overshot oil and gas brands

Tianhe Oil Group Co. Ltd. is a global group. We are specialized in the production of drilling tools, including R&D, production, selling, leasing, maintenance and services. Tianhe has 5 main businesses spread across the globe in more than 50 countries in the world.

Tianhe Oil Group management prioritize its people, technology, continuous improvement and building brand awareness. Our mission is to continuously strive innovation and improvement and expand our business in the oilfield. We increased the investment in technology research and development, always looking to provide our global customers with the best technical products and services.

Tianhe Oil Group strongly believes and promotes Total Quality Management, implements the ISO quality management system, HSE management system and API standards. Our manufacturing facilities are well equipped with four automated induction heat treatment lines and dozens of other types of heat treatment ovens and well furnaces (Box type, well type, carburizing heat treatment furnace) to ensure full coverage of heat treatment required by the different products.

So far, Tianhe Oil Group has established strong business relationships with over 200 international oil & gas companies in supporting the top 50 oil producing countries. For example, we have partnered with Schlumberger, Halliburton, Baker Hughes, Weatherford, Shell, NOV, etc.

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Highly specialized position skilled in the rigging-up, running tools in and out of the hole and the related procedures associated with retrieval of tools, drill string, and equipment in the well bore.

Rigging up and running tools in and out of the borehole and related procedures associated with retrieval of tools, drill string and equipment in the borehole.

More Subsea Oil and Gas Companies, Products, Projects, Drilling Rigs and JobsROVOTICSRovotics is based in the United Arab Emirates , Rovotics was formed in 2011 when a group of experienced ROV technical experts felt the market was lacking advanced systems that harnessed the latest technology, provided…

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Jakarta, IndonesiaJakarta, the capital and largest city of Indonesia, on the northwest coast of Java, at the mouth of the Ciliwung River. Jakarta is a separate metropolitan area with provincial status. The urban area has grown into…

Rio de Janeiro, BrazilRio de Janeiro, Brazil is a city in Brazil, and the capital of the state of Rio de Janeiro, located on the west side of the entrance to Baía de Guanabara. The metropolitan region has…

Perth, AustraliaPerth is the oil capital and the largest city in Australia"s largest state Western Australia. Perth"s 1.5 million inhabitants correspond to more than two thirds of the state"s inhabitants. Western Australia is one-third the size…

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In the modern era of oil & gas production, oil companies, drilling contractors, and drilling equipment providers have been focusing more than ever on optimizing drilling and production processes. Most of these improvements focus on cost efficiency, reduced process turnover time, safety, and meeting the ever-increasing levels of environmental controls mandated by statutory and regulatory bodies. Today’s tooling requires reliable operation in the harshest climates, seismic design, resistance to sour gas, as well as ever-increasing temperature and pressure ranges.

Mechanical Research & Design, Inc. specializes in a wide variety of oil & gas drilling and production tooling, from weld and bolt on seal housings to complete design-build drilling stack solutions. We specialize in pressure rated, industry certified, drill through and well control solutions as well as the ancillary structural equipment that supports these product solutions. Our products can be found on and offshore all around the globe supporting land-rigs, offshore platforms, and drill ships. We began by designing and manufacturing mud containment seal housings over 20 years ago and most of our equipment is still in operation, providing maximum flexibility, adjustability, and reliability for decades yet to come.

Mechanical Research & Design, Inc. prides itself on rapid engineering and manufacturing response from custom design adaptations to conventional drilling stacks and systems, and including rapid certification turn-around. Our staff is trained and experienced in the design and fabrication of many offshore drill plant solutions from the drill floor through down hole tooling. We provide an expansive array of drill through stacks and equipment utilizing our SEALFAST® Sealing Connectors; lifting and handling equipment; stack up and make-up platforms for dual purpose; well control equipment support structures; and a host of other customized tools you won’t find anywhere else in one location.

By utilizing our time-tested SEALFAST® inflatable and mechanical seals and packers, we are able to offer many flexible and configurable drilling stack solutions. Our products allow users to adjust for the height, angular alignment, and eccentricities in the drilling stack with unparalleled speed and efficiency. Our, fixed, telescoping, and spherical adjustment riser and mud flow line systems can be designed to accommodate down hole pressures from 5-2000 psig pressure ratings, with process mud temperatures of up to 300° F. Our active sealing technology continues to provide optimal sealing on mandrels and reducing faces, even if they corrode and wear over time, leading to lower maintenance costs

Mechanical Research & Design, Inc. designs and manufactures an assortment of fully certified Diverter and BOP support, restraint, lift, and storage equipment. Most units come certified for offshore portable equipment lifting and can include rated tie-down to deck structural steel for divert and upthrust events. Units can be adapted for integral nozzle load restraint for mud flow lines and safety rated work platforms. These frames are also used as make-up and load-rated hang-off platforms for surface drilling stacks.

Drilling riser and conductor make-up, hang-off, and stack-up support frames and modules are critical to drilling operations. We fabricate modular deck-slot frames rated to API® structural codes and for use in seismic zones, integrating to existing structural steel for weight and upthrust load transmission. Many of these frames can support dual operations such as lift/lower operations, conductor string cement verification, and manual to automated riser centralizer solutions. In addition to this, Mechanical Research & Design, Inc. provides hydraulic lifting and running tools, split handling clamps and spiders, and through bore access covers for safety. Most of these units can also carry Lloyd’s®, DNV®, or ABS® certifications.

We also design and manufacture an assortment of controls, enclosures, and hose management equipment solutions for offshore use. From ASME® certified pneumatic and hydraulic control panels to CSA®, UL®, and Atex® Hazloc Electrical Panels, we can provide most customized options for low and high pressure maintenance and monitoring for offshore portable or fixed location use. To support our panels, we provide manual and automated hose management systems and fire-rated umbilicals with API® certifications.

No matter your specific application within the oil and gas industry, Mechanical Research & Design, Inc. can meet your needs with a combination of specialized product lines and specialized applications of standard products. We feature a wide range of standard products ideal for use both on and offshore, such as our weld testing and isolation repair solutions. In addition to the oil and gas sector, our solutions can be found in nearly any industry that requires sealing, pressure testing, isolation, packaging, or part handling. We can customize most of our standard solutions to fit any unique need.

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A downhole tool used in fishing operations to engage on the outside surface of a tube or tool. A grapple, or similar slip mechanism, on the overshot grips the fish, allowing application of tensile force and jarring action. If the fish cannot be removed, a release system within the overshot allows the overshot to be disengaged and retrieved.

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Internal catch and pack-off parts are determined by the diameter of the fish. Each Logan Oil Tools Series 150 Overshot assembly is designed for a maximum catch diameter. A Spiral Grapple, Spiral Grapple Control, and a Type A Packer are used in the overshot bowl when the diameter of the fish is near the published maxi mum catch diameter of the overshot. When the diameter of the fish is considerably below the maximum catch diameter of the overshot (usually 1/2"), a Basket Grapple, a Mill Control Packer, or Basket Grapple Control are used in the overshot bowl.

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In today"s market of tight budgets, marginal fields and demanding time constraints, every hour of non-productive time is expensive. AsiaPac Oil & Gas is the service provider our customers should call on to get their operations back onto critical path and moving ahead.

With a fleet of new equipment, the most experienced and technically proficient team available, and a dedication and commitment you won"t find anywhere else, call us the next time your operation needs obstructions or debris removed from your well. We are on hand 24 hours a day, 7 days a week and ready to respond.

I debated on where to go next, but at the end of the day the most widely used fishing tool has to be an overshot. Some will say why not a spear? Well if you must ask, always go with the strongest fishing tool you can run to catch the fish. And if you run a spear, never plug the I.D. of your fish by breaking it off. Done with that!

The info that follows has been taken from the manuals published on overshots. I realize that paper manuals are a thing of the past, yes, yes at one time fishing tool hands carried massive catalog brief cases full of reference material. Now you have the luxury of your laptop loaded with information. If you have never sat down and read an overshot manual, now might be a good time.

The overshot is highly versatile and efficient tool. There are several different types of overshots, however each overshot is designed to engage a specific size of tubing, pipe, coupling, tool joint, drill collar or smooth OD tool.

The original overshot was developed by Bowen Oil Tools, which is now part of NOV. One thing I will point out is that in the catalogs you will see more than one assembly number for a given OD of Overshot, this came about due to the two locations developing their own variations. I found this information on NOV’s website and thought it was interesting to share.

In the early 1930s, the consequences of the stock market crash prompted S.R. Bowen to consider starting a company in Houston, where oil exploration and drilling was accelerating. In the early spring of 1934, his son Walter and a friend formed Bowen Company of Texas.

Bowen™ became a leader in innovation with the creation of the first overshot, the Series 150, in 1935. This tool set the standard for fishing equipment, and the quick acceptance of the tool assured the company partners that their business would be successful. The company continued to create new products, building a reputation for their well tool design and construction.

Currently there are several manufacturers of overshots, NOV (Bowen), Rubicon (Logan) and Applied Oil Tools (Gotco). These overshots are designated by a series number as follows:Series 10 - Sucker Rod Overshot

Overshots may be identified by one of the following, known as “type”:Full Strength (FS) - engineered to withstand all pulling, jarring and torsional strain

The basic overshot (from top down) consists of a top sub, a bowl, grapple, control, and a guide. In addition to the basic components, some overshots (Series 10 and 150) can be dressed with either a:Spiral grapple used if the fish diameter is near the maximum catch of the overshot, or a

The Series 150 Overshot features the ability to packoff on the fish. When the circulating packoff is not used, the fluid circulates down the drillpipe, aroundthe top outside of the fish, through the slip or grapple assembly, around the guide shoe and up the annulus.

When the circulating packoff is used, the annular space between the top outside of the fish and the inside of the lower part of the overshot is packed off, diverting the fluid flow down into the fish, making it easier to release and recover the fish. Packoffs usually are not high pressure devices but will often withstand sufficient pressure to establish circulation through the fish. Third party high pressure packoffs are available from various sources.

The extension can be installed between the top sub and the bowl of the Series 10, 70, and 150 overshots. It is used to extend the overshot bowl to:Allow the grapple to catch farther down on a fish that may be necked down at the top by having been pulled in two, or latched by an overshot and released several times, or to

A stop ring must be used where a fish OD reduces immediately below the catch area to allow the grapple to bite on full-size pipe.Example - catching a Hydril upset or EUE collar. If the upset of collar should pass completely through the grapple, the overshot may not be releasable.

If a stop ring is needed and the grappledoes not have a built-in stop, a stop ring can be run above the grapple, in the area between the Top Sub pin and the Grapple.

The Series 10 Sucker Rod Overshot is designed to engage and recover sucker rods, couplings, and similar items from inside tubing strings.Basket grapples are recommended for fishing for hardened and ground boxes (Sucker Rod Box).

The Series 20 Sucker Rod Overshot is a short catch tool which provides a means for engaging the exposed portion of a fish too short to be engaged with a Series 10 overshot.Uses basket grapples only

The Series 70 Short Catch Overshot is designed to engage the exposed portion of a fish too short to engage with Series 150 overshots.Uses basket grapple only

The Series 150 Releasing and Circulating Overshot is used to engage, packoff, and retrieve twisted-off lost tubing, drillpipecoupling, tool joint, casing or other similar fish.

Special Grapples:Nitraloy grapples may be available from some vendors. It is available only in the most popular sizes and is not commonly used on standard pipe.

A right hand wicker grapple converts a normal right release overshot to left hand release. This grapple is used where you expect to apply excessive right hand torque to release a packer, safety joint, etc. Note: Overshot will have to be released by left hand rotation.

Grapple Controls:Basket Grapple control packers have built in packoffs. These packoffs will hold various amounts of pressure, depending on the size of the fish and the condition of the packoff after engaging the fish.

High Pressure Packoff Assemblies:The High Pressure Packoff Assembly is an accessory to the Series 150 Overshots. It is used when high pressure circulation to the fish is required. It consists of a packoff sub with packing and packing rings and is installed between the top sub and bowl of the overshot. By running the packoff sub above the bowl, this design prevents the application of high internal pressures to the overshot bowl. The design of the High Pressure Packoff Assembly allows pressures two to three times the standard overshot packoff to be applied to the fish.

This information comes directly from the NOV manual for the Wide Catch Overshot. This is probably the first and only change to this common tool I know of in my career.

The Wide Catch Overshot provides the strongest tool available to externally engage, pack-off, and pull a fish that has been significantly worn. This tool has similar rugged design features and construction as the industry standard, Bowen Series 150 overshot, with the ability to interchange the Bottom Guide with the full range of existing components used with the standard Bowen Series 150 overshot.

In service, the Wide Catch Overshot (WCOS) takes a positive grip over a large area of fish and is capable of withstanding heavy pulling, torsion, and jarring strains without damage to the tools or the fish.

The WCOS has been designed to significantly increase the catch range of the OD of the fish to be caught, compared to the standard overshot. This enables a greater opportunity for a successful fishing operation in a reduced number of trips, thus reducing overall intervention costs for the operator. In addition to the large catch range, the WCOS has the ability to seal across very large extrusion gaps at both standard and high pressure and provide full circulation through the fish, should it be required.

New coarse threads have been introduced at the connection between the top sub and bowl to allow for quick assembly while maximizing the torsion and tensile strength.

Connections between the Top Sub/Bowl and Extension Sub have been designed to create a seal. This will prevent the connection from washing out should the overshot be required to be flowed through for a long period of time. In order to lock the Top Sub/Extension Sub to the Bowl from backing off during operation, set screws have become standard and will gall the threads should the connection break free.

The operation of all overshots is identical. The exception being that the Series 150 carries a packoff which provides circulation through the fish. First, determine that the overshot is properly assembled and dressed with the proper size grapple. Make up the overshot on the fishing string (normally it is run connected to the bottom of the bumper sub) and run it into the well. As the top of the fish is reached make sure circulation has been established to clear overshot ID of any plugging. Lower the overshot onto the top of the fish with no rotation at first. A 5,000 pound set down weight will be sufficient to engage the grapple. While lowering the overshot over the top of the fish watch for pressure build up, shut off pumps if any pressure build up is noticed. Should any back pressure be noticed, release the back pressure to allow the grapple to engage the fish. By elevating the string it can be determined, if the grapple went over and engaged the fish. If unable to work overshot over top of fish without rotation, then slowly rotate the fishing string to the right and gradually lower the overshot over the fish. Combined rotation and lowering over top of the fish are important to keep the grapple in the release position. This provides the maximum clearance between the grapple and fish. While lowering the overshot over the top of the fish, watch for torque build up and an increase in pump pressure. A pump pressure build up indicates the overshot has gone over the top of the fish thereby reducing the flow area. Stop rotation (continued rotation could dull the wickers of the grapple) enabling the grapple to set. Allow the right hand torque to slack out of the string and then pull on the string by elevating the string to set the grapple.

To release from the fish, bump down, then simultaneously rotate to the right and slowly elevate the fishing string. It is best to have a clean fishing top before running the overshot.

When you can’t reliably engage your fish with drillpipe, rely on the reliability and flexibility of fishing internal and external engagement tools from Baker Hughes.

Externally engage, pack off, and pull a fish with our wide range of overshot tools. The first fishing choice when screwing into the fish is not an option, our overshot tools are simply designed but ruggedly built. Choose from options including:

Kelo socket overshots are proven to catch small-diameter workstrings and sucker rods inside casing as well as recover coiled tubing that has parted and remains in hole.

The t-dog, mouse-trap, and flipper-dog (TMF) overshot can be dressed in three different ways for different washover applications. Deploy the t-dog assembly option to washover and recover mud-stuck or sanded-up square-collared pipe in one trip. Use the mouse-trap assembly to catch sucker rods, integral joint tubing, or cables. And with the flipper-dog assembly, you can confidently catch a fish with different ODs.

Hydraulic casing spears are run above a mechanical or hydraulic inside casing cutter, allowing cutting and casing pulling in one trip. The spears are set and released hydraulically for ease of operation and no need for mechanical intervention.

Type B™ and Type D™ casing and tubing spears retrieve a full range of casing sizes. The design of these spears affords easy dressing for alternate casing sizes, simple field-dressing to change the release setting, and fast, effective release—all of which help improve the efficiency of your fishing operations.

The Type E™ casing spearprovides effective casing retrieval in the most severe downhole environments. With its heavy-duty, high-strength design and simple construction you’re assured reliable performance and easy operation and maintenance for a wide variety of casing sizes and weights.