rotary table drilling rig free sample

Special features?Some rotary tables cannot be used to rotatethe string, in which case the top drive isused. Some rotary tables are hydralically-driven to rotate with a low torque and lowspeed only. Above: Rotary table installed new.

The Oil Rig Online International Drilling Systems Academy Training Specialists 1.2 Rotary Table – Page 1 INTRODUCTION The large gap in the centre of the rotary bush- For this reason this way of drilling is mostlyThe rotary table used to be the way to drill in ings is referred to as the “bowl” due to its abandoned and replaced by top drives whichthe old days. There are still many rigs in the appearance. The bowl is where the slips are are covered in a later module.industry that use this technique, especially set to hold up the drill string during connec-on smaller land rigs where they don’t have tions and pipe trips as well as the point the drill On more modern rigs the rotary tables areenough space in the mast to house the travel- string passes through the floor into the well used for support use only. This means that ining block, hook, swivel and top drive. The bore. The rotary bushings connect to the Kelly the process of installing the drill bit or making/rotary tables installed on the modern rigs are bushings with either four pins or a square box breaking up pipe the rotary table can be used.now called rotary support tables and are connection to actually induce the spin required These so called rotary support tables do notdifferent in design and power/speed output. for drilling. The biggest downside of this meth- have the same capacity as the standard rotary od of drilling is that one can drill only one joint table; these usually have a maximum speed ofMost rotary tables are chain driven. These at the time plus back rimming is not possible. 25 rpm instead of 150 rpm.chains resemble very large bicycle chains.The chains require constant oiling while in Below: Gearbox rotary table with severely damaged teeth. The design of the rotary table knows four dif-operation to prevent excessive wear. Virtually ferent ways of powering the table. Electric (ACall rotary tables are equipped with rotary locks, or DC), hydraulic power or mechanically pow-one for each direction. Engaging the lock can ered by either the drawworks or on compoundeither prevent the rotary from turning in one rigs driven by the main engine’s power train.particular direction or from turning at all. Thisis commonly used by crews which don’t want Below: Rotary table installed new with anti-slip mats.to use a second pair of tongs to make up orbreak out pipe.

The rotary bushings are located at the centreof the rotary table. These bushings usuallyconsist of the master bushing and the insertbowls. These can generally be removed in twoseparate pieces to facilitate large items, i.e. Right: Pinion from gearboxdrill bits, to pass through the rotary table. severely damaged.

The Oil Rig Online International Drilling Systems Academy Training Specialists 1.2 Rotary Table – Page 2 Rotary Table Checklist • Ensure that safety matting fits around Drawings from the Rotary Table Checklist• Check the condition of the air brake the rotary table. housing. • Measure and record any wear on the• Check the condition of the chain and master bushings and inserts; record the sprockets (maximum chain stretch 3% position of the slips inside the drill pipe as per API RP 7F (2003) section A.3.5). inserts of the master bushings.• Ensure that the electrical cables and • Function-test the manual locking system junction boxes have an EX raating of the rotary table in both directions. required for zone 1. • Review the backlash measurement• Inspect the condition and operation of records. the gearbox; check the oil for possible contamination with water.• Review any oil analysis reports and record the frequency of the oil sampling. Cross-sectional model of rotary table air brake• Function test the rotary table at 120 rpm for 30 minutes in a clockwise rotation; check for heat development.• Function test in an anticlockwise rotation at slow speed (20 RPM) for a short period.• when function testing, allow time for the unit to warm through. Then check the noise and vibration levels. Do not run in reverser for prolonged periods.• Check the condition of the main bearing. Above: Rotary table and master bushing.• Ensure that the DC and/or AC motors draw cooling air form outside the hazard- ous areas and that spark arrestors are fitted on the discharge side of the DC motors or discharge outside the haszard- ous area. Example of wear limit on tapered bowls

The Oil Rig Online International Drilling Systems Academy Training Specialists 1.2 Rotary Table – Page 3Above: Cracks found on the outer sideof the master bushings.

The Oil Rig Online International Drilling Systems Academy Training Specialists 1.2 Rotary Table – Page 4Above: Cracks in the lugs of the split-typemaster bushings.

Above: Rotary table with clearly worn master bushings and master bushing drill pipe inserts.

Left: The pin and the slots of the rotary master bushings need to be measured to ensure that they are within the OEM maximum wear limits.

The Oil Rig Online International Drilling Systems Academy Training Specialists 1.2 Rotary Table – Page 5 Left: Measure the neck of the master bushing inserts to ensure they are still within the OEM maximum wear limits.

The Oil Rig Online International Drilling Systems Academy Training Specialists 1.2 Rotary Table – Page 6Above: Disassembled bearing of the rotary table. Top Right: The bearings and bearing raceNote, the lack of lubricaton and the condition of the for this rotary table are completely destroyed.balls and the bearing race.

The Oil Rig Online International Drilling Systems Academy Training Specialists 1.2 Rotary Table – Page 7 Below: Brake housings are often found badly corroded.

Above: Damaged race and balls Above Right: Air-operated brake of the rotary table within the rotary table bearing. a new housing installed. Due to the brake’s location, corrosion on the brake housings is often severe, and they need regular replacement.

The Oil Rig Online International Drilling Systems Academy Training Specialists 1.2 Rotary Table – Page 8Above: Older totary tables are often driven byDC motors that need spark arrestors fitted to thecooling-air outlets.

Above: Damaged race and balls Above: Rotary table DC motor equipped within the rotary table bearing. new spark arrestors. Note, the purge alarm sensor in between the spark arrestors.

The Oil Rig Online International Drilling Systems Academy Training Specialists 1.2 Rotary Table – Page 9Above Left: New hydraulically-driven rotary tableinstalled and the tracks of the Iron Roughnect on top.

Above: Bowl locks must be in good working order, expecially on rigs which do not use a top drive. The lociks are vedry important, despecially when high-torque levels are encountered due to deviated drilling operationsl

Above: Many rigs use auto slips. Their operation must be checked as well as their mechanical condition and the NDT reports.

The Oil Rig Online International Drilling Systems Academy Training Specialists 1.2 Rotary Table – Page 10

Cameron rotary tables range from 27 1/2 in to 60 1/2 in and feature a large oil capacity that adds to the unit"s durability. The rotary table includes a forged-steel fabricated housing and a heat-treated forged-steel turntable. Each rotary table is supplied with spiral-bevel, induction-hardened gears and two independent ratchet-type locks, with lever access from the top to lock the table in position.

In this simple diagram of a drilling rig, #20 (in blue) is the rotary table. The drill string, while the rotary table rotates it. (Note: Force is not actually applied from the top (as to push) but rather the weight is at the bottom of the drill string like a pendulum on a string.)

A rotary table is a mechanical device on a drilling rig that provides clockwise (as viewed from above) rotational force to the drill string to facilitate the process of drilling a borehole. Rotary speed is the number of times the rotary table makes one full revolution in one minute (rpm).

The rotary table is also called a turntable. Most rotary tables are chain driven. These chains resemble very large bicycle chains. The chains require constant oiling to prevent burning and seizing. Virtually all rotary tables are equipped with a rotary lock". Engaging the lock can either prevent the rotary from turning in one particular direction, or from turning at all. This is commonly used by crews in lieu of using a second pair of tongs to makeup or break out pipes. The rotary bushings are located at the center of the rotary table. These can generally be removed in two separate pieces to facilitate large items, e.g. drill bits, to pass through the rotary table. The large gap in the center of the rotary bushings is referred to as the "bowl" due to its appearance. The bowl is where the slips are set to hold up the drill string during connections and pipe trips as well as the point the drill string passes through the floor into the wellbore. The rotary bushings connect to the kelly bushings to actually induce the spin required for drilling.

Most recently manufactured rigs no longer feature rotary drives. These newer rigs have opted for top drive technology. In top drive, the drill string is turned by mechanisms located in the top drive that is attached to the blocks. There is no need for the swivel because the top drive does all the necessary actions. The top drive does not eliminate the kelly bar and the kelly bushings.

Rotary drilling uses a sharp, rotating drill bit to dig down through the Earth’s crust. Much like a common hand-held drill, the spinning of the drill bit allows for penetration of even the hardest rock.

The idea of using a rotary drill bit is not new. Archeological records show that as early as 3000 B.C., the Egyptians may have been using a similar technique. Leonardo Di Vinci, as early as 1500, developed a design for a rotary drilling mechanism that bears much resemblance to technology used today. Despite these precursors, rotary drilling did not rise in use or popularity until the early 1900s.

Although rotary drilling techniques had been patented as early as 1833, most of these early attempts at rotary drilling consisted of little more than a mule, attached to a drilling device, walking in a circle. It was the success of the efforts of Anthony Lucas and Patillo Higgins in drilling their 1901 Spindletop well in Texas that catapulted rotary drilling to the forefront of petroleum drilling technology.

While the concept for rotary drilling – using a sharp, spinning drill bit to delve into rock – is quite simple, the actual mechanics of modern rigs are quite complicated. In addition, technology advances so rapidly that new innovations are being introduced constantly.

The basic rotary drilling system consists of four groups of components –  the prime movers, hoisting equipment, rotating equipment and circulating equipment – that all combine to make rotary drilling possible.

The prime movers in a rotary drilling rig are those pieces of equipment that provide the power to the entire rig. Steam engines provided the power to the early drill rigs. Gas and diesel engines became the norm after World War II. Recently, while diesel engines still compose the majority of power sources on rotary rigs, other types of engines also are in use; more so in the oil and gas industry than in the water well sector. Natural gas or gasoline engines commonly are used, as are natural gas- or gasoline-powered reciprocating turbines, which generate electricity on-site. The resulting electricity is used to power the rig itself. The energy from these prime movers is used to power the rotary equipment, the hoisting equipment and the circulating equipment, and, on large rigs, may be used as well to provide incidental lighting, water and compression requirements not directly associated with drilling.

The hoisting equipment on a rotary rig consists of the tools used to raise and lower whatever other equipment may go into or come out of the well. The most visible part of the hoisting equipment is the derrick, which serves as a support for the cables (drilling lines) and pulleys (drawworks) that serve to lower or raise the equipment in the well.

For instance, in rotary drilling, the wells are made with long strings of drill pipe extending from the surface down to the drill bit. If a drill bit needs to be changed, either due to wear and tear or a change in the subsurface rock, the whole string of pipe must be raised to the surface.

In deep wells, the combined weight of the drill pipe, drill bit and drill collars may be in excess of thousands of pounds. The hoisting equipment is used to raise all of this equipment to the surface so that the drill bit may be replaced, at which point the entire chain of drill pipe is lowered back into the well. The height of a rig’s derrick often can be a clue as to the depth of the well being drilled. Drill pipe traditionally comes in 20-foot sections, which are joined together as the well is goes deeper and deeper. This means that even if a well is 1,200 feet deep, the drill string must still be taken out in 20-foot sections. However, if the derrick is tall enough, multiple joints of drill pipe may be removed at once, speeding up the process a great deal.

The rotating equipment on a rotary drilling rig consists of the components that actually serve to rotate the drill bit, which, in turn, sends the hole deeper and deeper into the ground. The rotating equipment consists of a number of different parts, all of which contribute to transferring power from the prime mover to the drill bit itself. The prime mover supplies power to the rotary, which is the device that turns the drill pipe, which, in turn, is attached to the drill bit. A component called the swivel, which is attached to the hoisting equipment, carries the entire weight of the drill string, but allows it to rotate freely.

Below the drill pipe are drill collars, which are heavier, thicker and stronger than normal drill pipe. The drill collars help to add weight to the drill string, right above the bit, to ensure there is enough downward pressure to allow the bit to drill through hard rock. The number and nature of the drill collars on any particular rotary rig can be altered depending on the down-hole conditions experienced while drilling.

The final component of rotary drilling consists of the circulating system. There are a number of main objectives of this system, including cooling and lubricating the drill bit, removing debris and cuttings, and coating the walls of the well with a mud type-cake. The circulating system consists of drilling fluid, which is circulated down through the well hole throughout the drilling process.

The components of the circulating system include drilling fluid pumps, compressors, related plumbing fixtures, and specialty injectors for the addition of additives to the fluid flow stream.

Rotary drilling, as opposed to percussion drilling, cuts by rotating a bit at the bottom of the hole. In addition to rotation, downward pressure must be exerted and continued as the bit cuts it way through the formation.

Part of the art of rotary drilling is to match the bit type and pull-down pressure with the formation, and the use of drilling fluids to maintain circulation to keep the hole clear of cuttings and the bit lubricated and cool. A rotating table turns the drill string via a kelly bar passing through the table and attached to the top joint of the drill string.

hydraulically driven top-head, top-head unit with pull-down chains (more recent top-head-drive rigs are completely hydraulically driven, eliminating the need for chains or cables to provide pull-down forces); and

When beginning a new hole, and oftentimes during drilling operations, pull-down pressure from the drill rig is applied. This pull-down force is achieved by a screw, cable or chain arrangement, or by hydraulic motors. Hydraulically powered pull-down actions usually are found on more recently manufactured drill rigs, with screw, cable and chain pull-down arrangements more commonly found on older rotary rigs.

The driller controls the pull-down pressure and, thus, the speed of penetration. It must be noted that part of the art of rotary drilling is the matching of pull-down pressure to the formation. Excessive pull-down pressure can damage drill bits, drill pipe and the trueness of the borehole. Thus, applying more pull-down pressure is not always the best drilling practice.

The International School of Well Drilling (ISWD) was established in May 2002 to serve the needs of the water well, environmental and geotechnical sectors of the drilling industry. Since opening, ISWD has trained students both nationally and internationally. These students have included those seeking to enter the drilling industry, and those currently employed at a junior level in the industry, as well as industry regulators and licensed well drillers seeking to further their knowledge.

Since 2005, the ISWD’s focus has shifted to offering training to those already in the water well drilling industry. Continuing education as a requirement for license renewal is required in 27 states. The remaining states are likely to join the majority over time. ISWD is proud to offer continuing education credits for the well drilling industry online.

Depending on the size of your drilling pipes, Forum offers clamp types C, T, CXL and AMP to ensure a perfect fit while making-up or breaking-out the string.

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Explore the various drilling rig parts rotary table products available for wholesale at Alibaba.com. Get a drilling rig parts rotary table for drilling water wells, water exploration holes, geological exploration, coal mines, and other kinds of mining. Some drilling rig parts rotary table options use caterpillar tread to move. Others use rubber tires, while others require a separate means of transport. Caterpillar tread propulsion can climb up to 25 degrees inclination. Some products in the range are capable of drilling over 200 meters, while others are only used for open-pit mining with depths of around 3 meters. Drilling can be done vertically downwards, horizontally, or in a slanting direction. Drilling speed depends on the power of the machine and the general hardness of the surface. The hole diameter can vary from 90mm to 200mm.

drilling rig parts rotary table options also include an air compressor, a mud pump, drilling rods of various sizes, connectors, and a drilling tower. Drilling is done using drill bits of various shapes, sizes, and compositions. You can choose between diamond bits, alloy ring-shaped bits, 3-wing alloy bits, PDC bits, and hammer bits. Each drill bit uses different drilling methods, including rotary, percussion, blast hole, and core drilling.

Smaller products have a lifting power of around 25 kilonewtons and weigh about 2,500kgs. They’re ideal for small-scale drillings such as farms and homes. Larger ones are faster with more power, making them ideal for commercial use. Browse through Alibaba.com and find a drilling rig parts rotary table that’s ideal for your work scope. Buy mine drilling rigs for your wholesale business at competitive prices. Chinese wholesalers provide you with customization options and great after-sales services.