definition kelly hose quotation

A large-diameter (3- to 5-in inside diameter), high-pressure flexible line used to connect the standpipe to the swivel. This flexible piping arrangement permits the kelly (and, in turn, the drillstring and bit) to be raised or lowered while drilling fluid is pumped through the drillstring. The simultaneous lowering of the drillstring while pumping fluid is critical to the drilling operation.

A kelly hose is a piece of mining equipment. Specifically, it refers to a piece of equipment used in the mining of fluid or semi-fluid resources, such as oil and natural gas. The main purpose of a kelly hose is to allow the drill string to be raised and lowered at the same time that drill fluid is being pumped through it. This is important, as drill fluid is critical to the mining process.

In most cases, a kelly hose is classified as a large-diameter hose. This means that the inside diameter is usually between 3 and 5 inches (about 7.6 cm and 12.7 cm). This wide diameter allows for a significant rate of flow and reduces the likelihood of a blockage occurring in the hose.

The kelly hose must also be able to withstand large amounts of pressure. This applies primarily to the pressure of the fluid flowing through the hose. For this reason, it is often made of highly durable material and is generally reinforced with steel.

In a derrick or drilling rig, the kelly hose connects the standpipe, which is the rigid metal shaft that delivers the mining fluid, to the swivel, which is the piece that supports the weight of and controls the rotation of the drill string. Its purpose is to provide a flexible drilling fluid conduit, as a rigid conduit would be unable to move with the swivel and would therefore disallow movement of the drill string and, subsequently, the bit.

The drilling fluid, sometimes called drilling mud, carried by a kelly hose is critical to operations in several ways. It keeps the bit cool, which helps reduce friction and failure. It also cleans the bit and carries away drill cuttings so they cannot damage the drill assembly. Some varieties are used for additional purposes, such as preventing corrosion and providing hydrostatic pressure. Drilling fluid is not necessarily fluid, but may, in fact, be a solid, liquid, gas or other combined form.

The kelly hose is so named because of its connection with the kelly, the actual mechanical piece that ejects the drilling fluid over the drill string. It may alternatively be called a mud hose or a rotary hose. Failure can occur, despite the rugged construction of the hose. Such failure can lead to damage to the rig or a failure to operate. Failed kelly hoses must be repaired or replaced before mining operations can safely and effectively resume.

The rotary system includes all of the equipment used to achieve bit rotation. Originally, the main driver in the system of all rigs was the rotary table. The main parts of the rotary system with a rotary table are the swivel, kelly, and drillstring.

The rotary swivel (Fig. 1)serves two important functions in the drilling process. It is a connecting point between the circulating system and the rotary system. It also provides a fl uid seal that must absorb rotational wear while holding pressure. The upper section of the swivel has a bail for connection to the elevator hook, and the gooseneck of the swivel provides a downward-pointing connection for the rotary hose.

The kelly is the fi rst section of pipe below the swivel. The outside cross section of the kelly is square or (mostcommonly) hexagonal to permit it to be gripped easily for turning. Torque is transmitted to the kelly through kelly bushings, which fi t inside the master bushing of the rotary table. The kelly thread is right-handed on the lower end and left-handed on the upper end to permit normal right-hand rotation of the drillstring.

During drilling operations, in every connection, a new pipe is added below the kelly. To avoid premature wear in the kelly’s threads, a kelly saver sub is used between the kelly and the fi rst joint of drillpipe. Kelly cock valves are located on either end of the kelly.

Modern rigs use a topdrive to replace the kelly, kelly bushings, and rotary table. Drillstring rotation is achieved through hydraulic or electric motors. One type of topdrive is shown in Fig. 2

Heater hoses play a crucial role in a vehicle’s heating system, which operates in conjunction with the cooling system. Running engines produce a tremendous amount of heat that will need to be transferred away from the engine in order to prevent overheating and subsequent breakdowns. Heater hoses are responsible for carrying coolant to prevent overheating. Coolant or antifreeze flows through the engine, absorbs the excess heat, and carries the heat away from the engine. More specifically, heater hoses are responsible for transferring coolant away from the engine to the heater core, where the warm air can be blown inside the compartment of your vehicle by engaging the adjacent fan. Heater fans blow through the heater core to heat the vehicle and cool the antifreeze inside of it. The hoses transfer the coolant back into the path of the cooling system at a lower temperature so the coolant can continue to regulate consistent temperatures inside the engine.

Made of durable rubber, heater hoses are built to sustain the hot coolant that is carried from the engine to the heater core. Poor climate control is a sign of problems with your vehicle’s hoses. When your heater hoses near the end of their useful life, they will become hard and brittle or soft and mushy. If they crack, the coolant will leak and pool underneath your vehicle. When this happens, allow a member of our service staff to replace your heater hoses. A leaky hose means your heating system will not effectively heat your vehicle, and your cooling system will not have a proper supply of coolant. Leaky heater hoses can result in your engine overheating. As such, we encourage you to periodically inspect your heater hoses to determine the correct time to replace them.

Kelly Severide is a firefighter and the company officer for the second shift of Rescue Squad 3. Severide was previously known as a "ladies man", but has recently become more than that, with his character development and stable relationship. He is portrayed by Taylor Kinney.

Kelly is dedicated to his position in Rescue Squad and is proud to be there, happy that he did not need the help of his father to get where he is today.

Severide has many ex-girlfriends and flings, however the only relationships that seem to last are friendships, like those with his best friend Leslie Shay, his half-sister Katie Nolan and fellow firefighter Matt Casey. Recently, however, he has maintained a steady and healthy relationship with Stella Kidd. He also has two brothers from his father, Benny Severide"s marriage to his step-mother.

Kelly"s father Benny Severide was a member of Rescue Squad 4, alongside Wallace Boden and Henry Mills. When he was ten, his father walked out on the family, leaving Kelly with abandonment issues.

While meeting with his father, Severide spots Benny hugging a young lady believing the latter is cheating on his wife with her. Kelly then meets with Benny who tells him that he will succeed Boden as the new chief of fire house 51. This news leaves and shocked and angry with his father for trying to do that despite his close friendship with his chief. (A Power Move)

He was going for a run when his stepmother Beth for peers and discusses his father who has not been home in months, despite previously telling Kelly that he still was. He promises to speak with Benny for her on behalf of his half-brothers. While going on his jog, Severide comes across a secluded and empty construction site and encounters a young boy Nathan who has been trapped in a backhoe loader and is in dire need of assistance. After he notices the boy is wounded, he does his best to ensure that no more blood is lost while struggling to find a way to save him. The pair are trapped for the rest of the night, passing the time to talk. Kelly still learns that Nathan did this because his father who abandoned him was previously a construction worker and he wanted to learn how to do this on his own with him being able to relate because of his own father issues. Kelly is able to get free is able to cause the loader to flip back. Meanwhile, Shay who was looking for Kelly spots this and quickly arrives to his location. Severide stumbles out with Nathan in his arms, and the three race to the hospital. Shay and Severide sit wearily in the waiting room, rewarded by a chipper Nathan and his grateful mother. The long run and grueling night were worth every moment to Severide. (Joyriding)

He later confronts the young lady about her supposed affair with Benny until she reveals that Benny is her father, making her his half-sister, Katie Nolan. Very soon, Severide confronts his father and lashes out at him for everything. At the end, Benny acknowledges that Severide is right about him and apologizes for not being there for him. He also decides not to take the position of chief from Boden because of their friendship. Benny decides to go back to his wife and other sons but not before telling Kelly to get to know his sister. Soon Kelly goes to find Katie and formally meets his sister for the first time. (No Regrets)

Kelly continues to bond with Katie by having her over for dinner. He nearly walks in on her and Otis, after they kiss while playing the game Catan. Otis later asks for Kelly"s blessing to ask his sister out, after being really uncomfortable sneaking around behind his back, which he gives. (Shoved In My Face, Out With A Bang)

While at the firehouse, Kelly is approached by Katie on something. Katie has been offered a job opportunity in New York and it was a permanent situation. However she was unsure if she really wanted that because of their growing bond and her current relationship with Otis. During a blackout, he gets into altercation with a man named Vince Keeler. However, Katie is kidnapped by two men working with Keeler. (Tonight"s The Night)

His missing sister causes him to become determined to find her. He encounters one of the thugs and threatened him with a bat until he gives up Keeler. He found his sister in an abandoned building. He finds that she was attacked badly and he brings her to the hospital. Kelly wants to be there for his sister but is told to leave but not before telling her that he loves her. Kelly also gets into an argument with Mrs. Nolan who tells them it was his fault that Katie was hurt and he argues with her. He later apologized for this and she does the same to him. He is allowed to go to Katie and she tells Severide that even though she loves him, she"s accepting a job offer in another state and moves away. Before they part, brother and sister share one last hug.

Much later, Benny comes to Chicago to discuss the situation with Katie but is told his daughter already moved to get away from the drama. Benny tried to persist in talking to his son about the issue but Kelly told him if he cared so much then he would’ve stuck around. Kelly is angry when Lindsay reports to him that Vince Keeler, has been released. He gathered his comrades from squad three to help in going after Keeler something oldest wanted to take part in but Lindsay later tells him the Keeler went missing. (Keep Your Mouth Shut)

Kelly is called for the disappearance of Keeler. Voight takes to interrogating Kelly but he has nothing to give them. Kelly also has comrades keep quiet about his intended plans of revenge. That night, he dinner with his father and Shay, with Benny cooking up a fish that he caught in the lake. They discuss the case with the missing mobster Vince Keeler and he is told that the police are looking into firefighters. During this talk, Kelly is suspicious when Benny subtly implies that he had a role in the case something Kelly quietly picks up on. It is later confirmed Benny had been responsible for the murder of Vince Keller, when he arrived at 21st police district to speak to Hank Voight. Trudy Platt tells him that Voight was not around so he leaves his number. At a bar, he seems to confess to his involvement while preparing to turn himself in for his crimes. However, Voight understood his grief (being a father himself) and let him flee to Kenosha. (A Rocket Blasting Off)

Severide"s close and old friend Scott Rice is transferred to Squad 3. This raises tensions between him and Mills, who also wants his old spot back as he"s waiting for his medical clearance, but Rice gets there first. Scott tells Kelly that their old high school friend (April Sexton) is in town working at Chicago Med. In Forgiving, Relentless, Unconditional, Kelly explains why he passed some time at April"s house during his junior year: his father, Benny Severide, cheated on his mom with a school teacher (from Kelly and April"s school) in their own house. Mills is eventually transferred to Squad 3 again, but only stays a shift before deciding to leave to be with his family in North Carolina. Rice remains on Squad 3 until Otis starts to accuse him of being a "ducker" and avoiding tough calls. He initially claims there was a malfunction with his oxygen mask, which Otis and Cruz disprove. This causes great tension between Truck 81 and Squad 3, going as far as Severide nearly hitting Otis at Molly"s while defending Rice. However, the accusations prompt Severide to check the mask and he finds out Otis was telling the truth. Scott is dismissed from firehouse 51.

Kelly also develops a brief attachment to Detective Bianca Holloway at CPD when he tries to tell her that a missing body they find is a young girl who disappeared from his neighborhood a few years ago. She is initially irritated at his efforts in trying to identify the girl and tells him to back off. However, Severide turns out to be correct and later on, she asks him for a favor - to look after her son JJ while she prepares for a court hearing on a dangerous gang she had been investigating for years. He agrees, but doesn"t know about this until Antonio tells him about it. She tells Kelly she"s worried for her son"s safety and wants Kelly to look after him. He tells her she can drop him off anytime.

On the day of the hearing, she drops JJ off with Kelly for a few hours. However, CPD is soon at the firehouse and inform Severide that Detective Holloway was shot outside the court. He is upset to hear this, but insists that JJ stay with him until his aunt, who has requested that JJ not be told, has flown in from California. The officers agree and tell him to remain at the firehouse. The firehouse help JJ with a school project, trying to divert his attention from his mother, who he keeps asking to call. They let him film them for his "Day In The Life of a Firefighter" documentary and he tells them that now he just has to film his mom. A few hours later, Detective Crowley from CPD is back to tell him that Holloway died during surgery. He still insists that JJ stays with him until Mary (Bianca"s sister) is here and doesn"t let the other officer take him. Mary arrives later that night, and clearly upset and crying, asks Kelly to help her break the news to JJ. They take him to the briefing room next door and tell him with the whole firehouse watching from the window in the common room. He breaks down and Mary takes him away. Just before he leaves, Severide gives Pouch, their dog who has also grown close to JJ, to JJ as he cries in the car. He tells him he can visit or call anytime.

Severide is approaches by a fire chief from Springfield urging him to replace him on his position. Kelly seriously considers this, as he would love to start a relationship with Anna in Springfield. (An Agent of the Machine, Trading in Scuttlebutt, Purgatory) His hesitation is ended by Anna, who turns up in Chicago. Kelly finds her an open spot in Chicago Med (she works as a nurse). They"re happily dating and Severide even succeeds in making Anna feel like home. (Deathtrap, Telling Her Goodbye, Babies and Fools) Unfortunately, their happiness is short-lived, because Anna"s cancer returns. Kelly supports her in every way, but she dies anyways. Severide has a really hard time coping with her death, but eventually somehow manages to move on. (Take a Knee, Carry Their Legacy, Carry Me)

Stella moves in with Kelly. She tries to be cool with the idea of him dating, but she"s still jealous when he sleeps with Brett"s friend Hope Jacquinot.

After not seeing Severide for a few days, she grows concerned and suspects he is in Benny"s old cabin in the woods. When she goes to the cabin, Kelly answers the door and he tells her that she was right to break up with him because she deserves a better man, then he vows to be that better man and they make up. (

During Harold Capp polishing the original firehouse bell before they are called to a fire. During the call at an impound lot filled with toxic gas, Kelly watches as Capp is hit with a large wave of gas. Severide and Casey later learn that he has skipped treatment and gone missing, Will Halstead setting a deadline for them to find him. The two find Capp at his home, still suffering from the effects of the gas but after talking with him, they convince him to go back. Capp emerges from the room with glasses, telling them that he can no longer be a firefighter with his poor eyesight. However, Severide sees through this and states he is okay, with Capp revealing his ruse. Capp reveals that he will be fine in time and teases an amused Severide for being worried about him. The pair take Capp to Molly"s, where he is welcomed back. Hermann even offers free beers to celebrate Capp"s return, to the latter"s joy.

In Rattle Second City, the squad answer a call. Severide is nearly caught in the fire but it saved when Stella comes to his aid. At the house, Stella informs Kelly that Boden recommended that she take the lieutenant exam he supports her decision if she goes through with it. Stella also points out to Kelly that maybe something is going on with Casey and Brett, after the latter stays late at her home because of a stalker something that he takes note of.

During Smash Therapy, Kelly is approached by Casey to talk while smoking cigars. It was here the Kelly learned about Casey and Brett nearly hooking up being amused by this.

As an adult, Kelly still resents his father, but they gradually reach neutral terms. Kelly is also upset to learn that Benny had other children that he never told him about and lashed out at him for continuing his cycle of abandonment. Very soon, Benny meets him and acknowledges he was right about him while apologizing for his actions.

Kelly also realized that his father had something to do in the role of a missing gangster Vince Keeler who was responsible for kidnapping his sister Katie. However, Kelly likely did not confront his father on this because his father had done something right for their family.

Despite all his years of resentment towards Benny, Kelly ultimately showed that he did in fact love his father and was devastated by his death. Kelly paid his respects by giving a speech to Benny at his funeral.

From his childhood, he had a good relationship with his mother who was his primary parent after his father left. During a confrontation with his father, Kelly lashed out at his father for leaving him and his mother to struggle.

Initially, Kelly mistook Katie for his father"s mistress when he first saw them together until Katie reveals that she is his daughter. He is shocked to hear this, but is pushed by his father into meeting her and he awkwardly tells Katie that he is her older brother. At first, when the two talk, Katie thinks Kelly is a no show like their father, but he assures that he is not like their father and to see for herself.

In You Will Hurt Him, the siblings start to connect, with Kelly even being protective of her after seeing Otis flirt with her. Katie was also amused by him giving the “death stare“ to the latter. When Katie graduated from Cooking School, Kelly was the only member of her family to attend the ceremony and congratulated her, much to her joy. After the ceremony, Kelly told her that as her big brother he will be looking out for her from now on. To that end, he also organized a party for her at Molly"s, something she greatly appreciated and nearly cried tears of joy before hugging Kelly as thanks.

The two become close with Kelly referring to her as "Sis". After Katie is offered a job in New York, she confides in Kelly that she was unsure whether she really wants to take it because of their growing bond. Kelly appreciated her telling him and promise to talk more about it but Katie was kidnapped in Tonight"s The Night.

This caused him to become worried, so much that he went to Erin Lindsay for comfort in the crossover. Afterwards, he took matters into his own hands and attacked one of her abductors in Virgin Skin. Kelly soon locates his sister and brought her to the hospital, where he tells her he loves her and only wants for her to be okay. He also confronted her mother about her paying more attention to her stepchildren rather than Katie.

After getting hooked on pain pills, he saved Renée"s life and it resulted in them dating. She moved to Spain and he stayed behind. She is also known as "Renée 2" as his ex-fiancée was "Renée 1". She returns in the season 1 finale to tell Kelly that she is pregnant, hours after he learned that IVF with Shay didn"t work out. However, Severide soon figures out that the baby isn"t his which prompts Renée to depart, leaving Severide heartbroken.

Brittany Baker-Severide was Kelly"s first wife. The two first met at a craps table when Kelly goes on a weekend trip to Las Vegas and he asks for her help with betting due to her beginner"s luck. After their second roll of winning, he kisses her. The next Monday, Kelly shows up at Firehouse 51 wearing a wedding ring and seems ecstatic, telling all of his colleagues that he married Brittany, 24 hours after they met, at a Silver Bells Wedding Chapel.

Kelly and Brittany decide to end their marriage in Arrest in Transit, after Kelly realizes that although they love each other, he became Brittany"s escape from her parents after the loss of her sister. They split up at a train station and Kelly allowed Brittany to keep his ring, as a memento before he watched her head home to Florida.

Anna Turner was a patient with leukemia, who Kelly decided to help by donating his bone marrow to her. After this transplant, Anna and Kelly became close, and she eventually became his girlfriend. However, her illness got worse, and she dies in Carry Me. Kelly was there when she died, begging the doctors to revive her, but she had signed a DNR, preventing them from resuscitating her.

Severide was in a relationship with Stella until his father"s death. She told him she had been trying to work with him and take care of him, but he was not reciprocating and broke up with him. They got back together in I"m Not Leaving You and have been together ever since. Kelly has mentioned that he wants to stay with Stella forever, mentioning their children and grandchildren together.

Kelly Severide and Matthew Casey are coworkers and lieutenants at the fire station. At the beginning of season one, after the death of a close friend, they have some trouble getting along and often butt heads, but would come together for the sake of the house. By season 2, they have stopped blaming each other and get along very well. They are often seen putting themselves in danger to protect each other, such as when Kelly went into an unstable burning building to help Casey rescue his fiancée, Hallie. After Casey is injured in

Kelly and Leslie Shay are co-workers, best friends, and roommates. In Season 1, Shay was supplying Severide with pain medication to help with his neck injury. In God Has Spoken, Shay and Dawson are restocking the ambulance at the scene of an MVC when a flatbed tow truck blows a tire and hits the ambulance. Dawson only had minor injuries, but Shay sustained a major head injury. She survives, but Severide blames himself for the accident because they were restocking painkillers Shay had given to him. He felt better once she came back to work and the accident was never mentioned again. She also wants him to donate sperm for her to conceive a child.

In Season 2, when Kelly is interviewed by Voight about the disappearance of Keeler, Voight asks him if Shay is his girlfriend. He responds "She would be if she wasn"t a lesbian." Shay also said if she was not a lesbian then Kelly would be her choice of a man to date.

In I Am the Apocalypse, when Kelly is seriously injured during the Chicago Med incident, he"s shown to be having dreams about her laughing while he"s in surgery.

A kelly drive is a type of well drilling device on an oil or gas drilling rig that employs a section of pipe with a polygonal (three-, four-, six-, or eight-sided) or splined outer surface, which passes through the matching polygonal or splined kelly (mating) bushing and rotary table. This bushing is rotated via the rotary table and thus the pipe and the attached drill string turn while the polygonal pipe is free to slide vertically in the bushing as the bit digs the well deeper. When drilling, the drill bit is attached at the end of the drill string and thus the kelly drive provides the means to turn the bit (assuming that a downhole motor is not being used).

The kelly is the polygonal tubing and the kelly bushing is the mechanical device that turns the kelly when rotated by the rotary table. Together they are referred to as a kelly drive. The upper end of the kelly is screwed into the swivel, using a left-hand thread to preclude loosening from the right-hand torque applied below. The kelly typically is about 10ft (3m) longer than the drill pipe segments, thus leaving a portion of newly drilled hole open below the bit after a new length of pipe has been added ("making a connection") and the drill string has been lowered until the kelly bushing engages again in the rotary table.

The kelly hose is the flexible, high-pressure hose connected from the standpipe to a gooseneck pipe on a swivel above the kelly and allows the free vertical movement of the kelly while facilitating the flow of the drilling fluid down the drill string. It generally is of steel-reinforced rubber construction but also assemblies of Chiksan steel pipe and swivels are used.

The kelly is below the swivel. It is a pipe with either four or six flat sides. A rotary bushing fits around the flat sides to provide the torque needed to turn the kelly and the drill string. Rollers in the bushing permit the kelly free movement vertically while rotating. Since kelly threads would be difficult to replace, normally the lower end of the kelly has saver sub — or a short piece of pipe — that can be refurbished more cheaply than the kelly. Usually, a ball valve, called the lower kelly cock, is positioned between the kelly and the kelly saver sub. This valve is used for well control if the surface pressure becomes too high for the rotary hose or surface conditions.

According to the ″Dictionary of Petroleum Exploration, Drilling and Production″, ″[The] kelly was named after Michael J. (King) Kelly, a Chicago baseball player (1880-1887) who was known for his base running and long slides.″

In an effort to help those in the industry adopt a safety first mindset, Grainger, a supplier of MRO products to the oil and gas industry, offers the following guidelines:

Recognized as one of the most efficient high pressure hose safety restraints, the Whip Socks are designed to prevent injuries and severe fatalities in the event of a hose failure. Whip Sock’s name is inspired by the structure, the stocking style Hose Whip Stops device sits around a hose similar to a woven steel sock. The idea is to provide a grip on a hose over the larger area so to securing the hose and prevent it from whipping if a high-pressure accident causes the hose to release from its place.

There are several varieties of equipment to stop a hose from whipping around in case of unpredictable whipping hose accidents. Not only do the braided cable restraintshelp to protect the pipe from potential rapture, it also prevents the hose from whipping around.

Our Whip socks are used not only as air hose safety equipment but for other hose carrying agents as well. They can be incorporated in hose safety systems for a variety of applications where different substances are transferred through a hose at high-pressure, including; air, fluid, water, hydraulic, slurry, mud etc.

The whip sock is made for safety as its primary function. It features a unique construction that prevents unpredictable and potentially hazardous movement of a high pressure hose in the event of failure. Hence, the whip stop is ideal for any workplaces where personnel are in close working range with high pressure hoses.

The Raah Safety WHIP STOP is made from braided steel cable that wraps over the small pipe or hoses. The design is made in such a way that in case of pressure force is applied from the interior, the cable to tighten down on the hose, hence controlling the hose lashing.

The Make sure the Whip Stop has a good fit on the hose, lay it nice and flat. Once put on the hose make sure the netting diamonds are as wide as they are longer to create a nice tight fit. Once installed brace the hose and pull on the Whip Stop, it should not slide, if it slides it’s too big, you need to replace to the correct size Whip Stop. Regular inspection of the Whip Stop is advised once installed. Make sure the eyes are not elongated or ruptured or have any broken wires; Always lookout for rust on the Whip Sock or any individual strands broken. This means the whip stop has been under a load and needs to be pull out of service and replaced with a new Whip Stop.

The force calculator will give you the forces created during a failure with fluid.To calculate the force on hoses with air or gases, double the fluid reading.

Raah Safety supplies high pressure hose restraint systems, including; Whip Stops, hobble claims, whip checks, red iron sling and more. Contact us to find out more about the suitable hose restraint systems for your exact demands, or get customized tagging or pressure ratings. Place an order today and take advantage of our exceptional discounts on bulk purchases.

This invention relates to the apparatus for large diameter shaft drilled excavations. More particularly, it relates to the use of kelly bars for large diameter shaft drill excavations. Specifically, it relates to the use of a reverse telescopic kelly bar for large diameter shaft excavations.

In the drill shaft industry, kelly bars are used to transmit the twisting torque from the rotary machinery to the bit or drill tool. This gives the bit or drill tool the ability to turn and excavate the earthen materials directly below itself.

The outside cross-section of a kelly bar is usually square, although other shaped kellys are sometimes used, such as round or hexagonal. The purpose of the cross-section is to enable torque to be transmitted from the rotary table to the cutting bit. During drilling operations, the kelly bushings or drivers remain on the rotary. Torque is applied from the rotary table through the kelly bushing, and thence to the kelly bar itself. The kelly bar is free to slide through the kelly bushing so that the drill can be rotated and simultaneously lowered or raised during drilling operations.

The drill shaft industry is normally associated with shaft excavations that range from 12 inch diameter to 10 feet or more diameter shafts. Depths range from several feet to 100" or more. The bigger the diameter and greater the depth the bigger drill rigs and the larger kelly bars need to be.

The kelly bar is usually raised and lowered by a single line usually made of braided wire rope or steel cable. This line is used to lower the kelly bar with the tool attached into the shaft and to raise the kelly bar and tool with excavated materials to the surface. A single line is usually adequate on depths up to 100 feet. When the shaft diameters are very large, which requires large, heavy drilling tools, and the kelly bar with the spoil exceed single line pull limits then multiple lines can be used.

A variation of a single kelly bar is the telescopic kelly bar. Telescopic kelly bars are used in the industry to achieve greater depths in drilling. It may comprise two sections, one inside the other. The outer bar may be made of square tubing and the upper inner bar may be made of solid square or possibly hollow square tubing. A single line hoist cable may be connected to the upper inner kelly bar by a swivel. The outer large kelly bar rests on the inner smaller kelly bar and drives the inner kelly bar. The smaller inner kelly bar is attached to the excavation tool such as an auger. As the auger proceeds deeper in the excavation, both kelly bars are extended downward until the top of the outer larger kelly bar descends to the top of the drive rollers or drive bushings. At the moment the top of the outer kelly bar hits the top of the drive rollers, the inner kelly bar will telescope or extend further downward from the outer bar. As the excavation progresses with each trip into the hole the telescoping of the kelly bar extends the auger to the bottom of the excavation until you reach the limit of the extension of the kelly bar.

Another configuration on telescopic kelly bars is to hold the upper outside bar with one hoist line and the lower inner bar with a separate hoist line. The drill operator coordinates the hoisting and lowering of the bars.

As the size and weight of structures increase, larger shafts are required. Large shafts for tunnels or mines have been excavated using mining techniques. It may be hard to drill the larger shafts due to the limitations of the currently available equipment. Two factors that make the use of traditional drill shaft techniques for very large and deep excavations difficult are torque requirements and hoisting requirements. Where a typical drill shaft is less than 10 feet in diameter, tunnel shafts may go up to 30 feet in diameter and a depth greater than 200 feet. These larger dimensions call for larger and longer kelly bars so they can transmit the required torque to extended depths. Larger dimensions call for longer and heavier kelly bars. The use of these larger kelly bars means that single line pulls on cranes may not be adequate. The weight of a large kelly bar that transmits high torque to great depths can be greater than 30,000 lbs. If we add to this the weight of the tool and the muck or the spoil being lifted from the excavation, a total weight greater than 50,000 lbs. may be handled by the crane and cable supporting the kelly bar and tool. In order to handle the increased loads, a multiple part line may be implemented. The use of a multiple part line on a deep shaft would be impractical on a conventional telescoping kelly bar. A reason for this is that the shieve block connected to the upper inner kelly might not be able to extend and descend through the outer kelly bar unless the outer kelly bar has an extremely large bore or inside cross-section.

The present invention includes a reverse telescopic multi-section kelly bar capable of digging hundreds of feet deep necessary for the large diameters associated with tunneling or other large diameter deep shaft requirements. An objective of the present invention is to solve some of the problems associated with drilling large diameter deep shafts. The lower outer bar of the present invention is rigid and is attached to the drill tool, a straight hole may be drilled when a drill tool is used that is slightly larger in diameter than the largest cross-section of the lower outer bar. This could not be accomplished with a conventional telescopic kelly bar because the tool attaches to the smaller bar. Once the lower outer bar on a conventional telescopic kelly bar is fully extended it can no longer follow the drill tool, thus losing the lower outer bar rigidly at the top of the tool and losing an excavation that is slightly bigger than the longest cross-section of the kelly bar attached to the tool. Another objective of this invention is to allow drilling near perfect straight shafts. Another objective of this invention is to provide the operator full control of the kelly bars. An additional objective of this invention is the elimination of uncontrolled floating of kelly bars. Another objective of this invention is to allow handling of large muck quantities. These and other objects of the invention will be apparent to those skilled in this art from the following detailed description of a preferred embodiment of the invention.

The invention comprises a reverse telescopic kelly bar that includes an outer bar, any number of middle bars, and an upper inner bar. Each section has its own driver that either rests on top of the adjacent, lower larger diameter section or is engaged to the rotary. The entire assembly is suspended by a swivel attached to a multi-shieve traveling block. When a section is rotated, it is either rotated by its driver via the rotary or by the connected and adjacent lower and smaller diameter section. Upper inner lugs are provided on the inside of the hollow sections. These upper inner lugs are located near the upper part of the middle bar and lower outer sections so that they can receive torque, if required by the cross-section, when fully extended from one section to another section below the rotary. A thick ring is welded to the bottom of the middle section and upper inner section. The inside lugs and the bottom ring also act as a stop to hold the adjacent sections together when they are fully extended so that adjacent sections can be supported from the other. Depending on the cross-sectional shape, the sections also may have outside drive lugs to transmit torque from the rotary and to transmit torque to the upper inner lugs of the next larger bar. The sections may have slots (or holes) and pins to connect each bar together and support the hanging sections. Square sections or other multi-sided sections may not need upper inner or outer lugs for purposes of transmitting or receiving torque. A lug would be needed for hanging the bar on the heavy ring.

The present invention allows a drill operator to have visual contact to observe any section when necessary. It uses a reverse telescoping kelly bar as shown in FIGS. 1 and 4a. The reverse telescopic kelly bar assembly consists of an upper inner section 10, upper inner driver 30, middle section 12, middle driver 32, outer driver 34, lower outer section 14 and pins 5 and 7. Although three sections are shown, additional middle sections can be used. FIG. 1 shows the bar assembly configuration of the reverse telescopic kelly bar. Upper inner section 10 is comprised of outer drive lugs 8. Outer drive lugs 8 are designed to transmit torque to upper inner drive lugs 22 of middle section 12. An enlarged broken view of this is shown in FIG. 1a.

FIG. 1 and FIG. 1a show that at one end of the upper inner section 10 ring 20 is located. The object of ring 20 is to act as a stop between middle section 12 and upper inner section 10 when both bars are fully extended. Upper inner section 10 has slot 16 and slot 17 as shown in FIG. 1c. Slot 16 and slot 17 are holes that are designed to let a pin go through. This pin can be any kind of heavy duty pin. Slot 16 is designed to receive a pin that will hold together middle section 12 and upper inner section 10, as shown in FIGS. 2a, 4a and 4b. Slot 17 is designed to receive a pin that will hold together upper inner section 10 with middle section 12 and lower outer section 14 shown in FIG. 2a. Generally, the number of slots that it has is the number of sections of larger diameter that the reverse telescopic kelly bar has. Upper inner section 10 also has swivel 6 that is used to lift the whole assembly.

FIG. 2a shows a perspective view of the top of the assembly of the reverse telescopic kelly bar, a part of upper inner section 10 with its upper inner driver 30, middle section 12 with its upper inner driver 32, and the top section of lower outer section 14 with its outer driver 34 and rotary 80. It specifically shows the lower outer section 14 hanging on the outer driver 34. Upper inner section 10 is of a smaller diameter than the diameter of middle section 12, which is a smaller diameter than that of lower outer section 14. Upper inner driver 30 is of a square shape and is designed to rest on top of middle section 12. Middle driver 32 is composed of two parts, the two parts are shown on FIGS. 3b through 3d. The above part is a donut 35. The bottom part is a block 36. In the upper inner portion of donut 35, there is a hole 37 that is designed to specifically engage with the upper inner driver 30. Block 36 is located under donut 35. Block 36 is designed to rest on top of the lower outer section 14, as shown on FIG. 2a. The outer driver 34 is a two part embodiment. Outer driver 34 is engaging with rotary 80. A better description of outer driver 34 is shown on FIG. 3e. FIG. 2a also shows slots 21 and 21" of middle section 12 and slots 27 and 27" of lower outer section 14. Upper inner driver 30 transmits torque to upper inner section 10, middle driver 32 transmits torque to middle section 12 and outer driver 34 transmits torque to lower outer section 14.

FIG. 2b shows the whole kelly assembly when lower outer section 14 is fully extended. It shows middle driver 32 resting on top of outer driver 34, upper inner driver 30 resting on middle section 12, and upper inner section 10 inside middle section 12. A pin is inserted in slot 21 of middle section 12. The pin goes through slot 21 of middle section 12 and goes through slot 16 of upper inner section 10 as shown in FIG. 4b. While a pin is holding both sections together this pin is under considerable stress making it difficult to remove. In order to remove pin 5, pin 5" needs to be inserted in slot 21" in order to hang middle section 12 on middle driver 32. Once middle section 12 hangs on middle driver 32, the stress that pin 5 is under is relieved making it easier to remove pin 5.

To illustrate how the system works, a cross-section of all bars stacked together is shown on FIG. 4a. FIG. 4a shows upper inner section 10, middle section 12 within lower outer section 14. The bars are held together by pin 7 that goes through slot 27 of lower outer section 14, slot 21" of middle section 12 and slot 17 of upper inner section 10. Another pin 5 holds together middle section 12 and upper inner section 10. Pin 5 goes through slot 21" of middle section 12 and slot 16 of upper inner section 10. Upper inner driver 30 of upper inner section 10 rests on top of middle section 12. Middle driver 32 rests on top of lower outer section 14. Outer driver 34 of the lower outer section 14 rests inside rotary 80. Rotary 80 has direct engagement with outer driver 34. Rotary 80 transmits torque to the outer driver 34 which then transmits the torque to lower outer section 14. The three drivers rotate and turn the reverse telescopic kelly bar. Once the lower outer section 14 is drilled out or fully extended downwardly, as shown on FIG. 4 b, the process to release pin 7 which holds all three bars together begins. The first step is to hang lower outer section 14 as shown on FIG. 2a. This consists of inserting a pin 7" in slot 27 of lower outer section bar 14. After pin 7" has been inserted in slot 27, lower outer section 14 is then let to hang on outer driver 34. At this point, pin 7 is removed. Once pin 7 is removed, lower outer section 14 is released from middle section 12 and upper inner section 10. In order to drill deeper, the middle and upper inner bars or sections are lifted up as shown on FIG. 4c and pin 7" is then removed. Pin 5 goes through slot 21 of middle section 12 and slot 16 of upper inner section 10, holding the two bars together. Middle driver 32 then applies a rotating force to middle section 12 which in turn passes the rotating force to lower outer section bar 14. The drilling will continue, until the point middle section 12 cannot go any lower, as shown on FIG. 4d. In order to continue with the excavation, it is necessary to lift upper inner section 10 as shown in FIG. 4e. This is done by lifting middle section 12 so that pin 5" can be inserted in slot 21" of middle section 12 as shown in FIG. 2b. Once pin 5° is inserted in slot 21" of middle section 12, middle section 12 can hang on middle driver 32, as shown on FIG. 2b. When middle section 12 hangs on middle driver 32 the stress of pin 5 is released. At this point, pin 5 is retrieved. Upper inner section 10 is lifted as shown on FIG. 4e. Outer driver 34 then applies rotating force to middle driver 32, and middle driver 32 transmits the rotating force to upper inner driver 30. At this point, the rotating force that is passed to upper inner driver 30 is transmitted to upper inner section 10. The rotating force is transmitted from upper inner driver 30 to upper inner section 10, which then transmits rotation to middle section 12. Middle section 12 transmits rotation to lower outer section 14. The drilling will continue until the desired depth is accomplished or upper inner section 10 is unable to go any lower, as shown in FIG. 4f.

The foregoing is the preferred embodiment of the invention. However, various changes can be made in this system without departing from the scope of the invention. These changes can be the use of different cross-sectional bars other than those shown. This cross-section could be square or of other shaped cross-sections. These other cross-sections will not require drive lugs to transmit torque. The preferred embodiment should not be interpreted as limiting the scope of the invention.