Automatically adjusted drive jaw of pipe wrench

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to equipment used for servicing and repair of oil and gas wells, particularly, to mechanised pipe wrenches. Pipe wrench driven jaw comprises head designed to receive the hook with threaded end. Note here that said threaded end is secured to head end opposite the hook-like end with adjusting wrench equipped with hydraulic drive. Note here that adjusting wrench can be actuated by control unit for opening/closing the jaws or handling different-diameter pipes.

EFFECT: pipe wrench for fast handling of pipes.

20 cl, 16 dwg

 

Background of invention

1. The use of inventions

The present invention, in General, relates to equipment used for maintenance and repair oil and gas wells, and more specifically refers to the drive jaw pipe wrenches or pipe the keys of this type, which is used for screwing or unscrewing the threaded connection between the serially connected elements of the column from which it is harvested continuous pump-comisarow column is lowered into the wellbore during the development of underground deposits.

2. The level of technology

When drilling oil or gas wells it is usually necessary to create a long drill string. Because of the great length of these columns column section successively added to the drill string as they are lowered into the borehole from the drilling platform. It is common practice to use nodes pipe wrenches for the application of a predefined torque when screwing or unscrewing of the connection pipes of the drill string. Nodes pipe wrenches usually come on the platform, either on rails or suspended on a chain on the rig. Examples of known nodes pipe wrenches described in U.S. patent No. 5060542, 5386746 and 5868045 registered n the name Thomas D. Hauk. Description of U.S. patent No. 5060542, 5386746 and 5868045 incorporated into the present application in their entirety by reference.

For screwing or unscrewing the threaded pipe joints used the known nodes pipe wrenches, including active (or working) jaw pipe wrench by means of which the reported torque section of the column above or below the threaded connection, while the passive (or holding) the jaw of the pipe wrench reported reactive torque below or above the threaded connection, respectively, depending on whether to perform the Assembly or disassembly of the column. More specifically, in the known nodes, pipe wrenches, described in U.S. patent No. 5060542, 5386746 and 5868045, disclosed the use of the jaws, pipe wrenches, three levels, the jaw pipe wrenches at each level trigger when turning in a predefined direction in such a way as to create a stronger clamp pipe while turning it in the mentioned direction. The jaw of the upper and lower layers oriented in such a way as to rotate the pipe in one direction, while the jaw mid-level oriented in such a way as to rotate the pipe in the opposite direction. Upper, middle and lower jaw of the pipe wrench was placed at a distance from each other is in the vertical direction and connected together, forming a self-contained unit of the tool or pipe wrench. The upper and lower jaws of the pipe wrench fastened to the base frame, while the average jaw pipe wrench pivotally attached between the upper and lower jaws of the pipe wrench to the common frame.

To connect pipes of the upper section of the column was rotated, for example, torque tool to achieve the desired final tightening. Then the host pipe wrench regulated so that the upper jaw of the pipe wrench engaged with the section of the column located above the pipe connection. Then average the jaw of the pipe wrench was hooked with the section of the column, which is located slightly below the pipe connections. The lower jaw of the pipe wrench disposed below the connection of the tool, where it was next to the pipe, but was not geared with the pipe when performing the connection. Then the upper and middle jaw of the pipe wrench was pinching the pipe, after which the upper jaw Assembly pipe wrench rotated to perform the join. After that, the upper and middle jaw pipe wrench bred for release of the tightened connection of pipes.

For violations (or attenuation) of the connection before unscrewing, by unscrewing, by using conventional rotary tool, the host pipe wrench moved in the vertical is upravlenii thus, to average jaw pipe wrench engaged with the column slightly above the connection pipe, and the lower jaw of the pipe wrench engaged with the column a little below the bottom of the pipe connection. For loosening the upper jaw of the pipe wrench is usually disposed above the connection, but it did not enter in the pairing with the column. The middle and lower jaws of a pipe wrench, then pinched on the column above and below the pipe connections, respectively. The average jaw of the pipe wrench is then rotated counterclockwise to unscrewing or loosening of the connection.

Thus, the connection of pipes is performed by clamping the middle of the jaw of the pipe wrench on the lower part of the connection pipe, and used the upper and middle jaw of the pipe wrench to rotate the upper part of the connection pipe clockwise. Unscrewing the connection is performed by clamping the lower jaw of the pipe wrench on the bottom of the connection of the column and used the jaws of the pipe wrench of the middle and lower levels for rotating the upper part of the connection string counter-clockwise.

The jaw of modern nodes, pipe wrenches can be adjusted to the girth of pipes of different diameters. As indicated in the above U.S. patents, each jaw of the pipe wrench contains a hook with the end of the shank extends from the hook. The end of the shank provided with pain is Oh. The head is adapted for placement of the end of the shank of the hook. Allen node is located at the end of the head opposite the hook for threaded engagement with the end of the shank of the hook. The nut contains a handle by which facilitate manually turning the nut in either direction to pull-out and sadhane the end of the hook jaw pipe wrench for gripping pipes of different diameters. The relationship between the nut, the hook and the head is such that by rotating the nuts provide the dilution or mixing of the jaw of the pipe wrench to the desired position relative to a specific diameter of pipe connections.

For screwing or unscrewing of the connection of the drill string must be enclosed high torque over a large angle, which is applied by means of introduction in action of the jaws of the pipe wrench. Jaw pipe wrench, first put in action by providing a hydraulic clamping cylinder, which rotates the hook and head relative to each other, reducing and thus increasing the clamping jaws of the pipe wrench on the pipe. The initial pair of clamping cylinder pipe start the application torque than provide the opportunity for more efficient subsequent application of torque. Then use other hydraulic means is, for example, the hydraulic cylinder to generate torque for the application of torque.

As explained above, while the jaw known pipe wrenches include automated mechanisms to clamp the pipe and for the application of a large torque to the jaws of the pipe wrench, when using pipe wrenches according to the analogs and the prototype is still required manual control pipe wrenches to enable gripping of pipes of different diameters. For this reason, the commencement of the process of screwing and unscrewing each jaw of the pipe wrench is required to manually dissolve and reduce to enable gripping of pipes of different diameters. When using jaw pipe wrenches, which requires manual operation of adjusting the position of the jaws, additional time is required to perform these operations when executing processes associated with the screwing or unscrewing of pipes, and also increases the risk of injury to the operator, the control node of the pipe wrench.

The aim of the present invention is to provide a jaw pipe wrenches and nodes of the jaws, pipe wrenches, ensuring the reduction of time for screwing or unscrewing pipe connections and increase safety when performing operations using the alusta pipe wrenches by minimizing the contact of the operator with them.

Brief description of the invention

According to the invention the drive system of the jaws of the pipe wrench designed for engagement and application of large torque to the pipe with threaded connections, containing at least one pipe wrench containing a head and a hook to engage the pipe, adjusting wrench node for pull-out and sadhane hook a pipe wrench on head, motor, mechanically connected with the adjusting wrench node to drive the node to pull-out and sadhane hook a pipe wrench, and a control unit associated with the engine to control the engine.

The motor may be a hydraulic motor.

The control unit may include a user interface.

The hook may include a shank fitted on the end of the thread, the head contains a hole for introducing the end of the shank of the hook and pass the end of the shank through the hole in the head to engage the threaded end of the shank with the adjusting wrench node.

The adjusting nut Assembly can be pivotally attached to the head.

The swivel hook can bitsadmin head.

The drive system of the jaws of the pipe wrench may additionally NigeriaSat the host pipe wrench, containing at least three pipe wrench.

The drive system of the chel the TEI pipe wrench can optionally containing an Assembly of a support, containing the column extension, passing from one end of the column and containing a bearing block attached to the extension at its opposite end, to maintain the host pipe wrench.

According to the invention correspond with the jaw of the pipe wrench designed for engagement and application of large torque to the pipe with threaded joint, comprising, a hook having a shank, fitted with a threaded head, which is adapted for introduction into it of the threaded end of the shank of the hook, and adjusting wrenches node is equipped with a hydraulic drive, setuplayout with a threaded end of the shank of the hook located on the end of the head opposite the hook.

The adjusting nut Assembly can be hinged to the head.

The hook may be hinged to the head.

According to the invention is created automatically adjustable knot pipe wrench for engagement and application of large torques to a column section with a threaded connection, containing a support Assembly having a casing, an extension cord, passing from one end of the column and containing a bearing block attached to the extension at its opposite end, and a lot of pipe wrenches that contains the head, hook and adjusting wrenches node is equipped with a hydraulic drive, for pull-out and sadhane CRU is but a pipe wrench relative to the head.

The hook may include a shank fitted on the end of the thread, the head contains a hole for introducing the end of the shank of the hook and pass the end of the shank through the hole in the head to engage the threaded end of the shank with the adjusting wrench node.

The adjusting nut Assembly can be hinged to the head.

The hook may be hinged to the head.

The host pipe wrench may contain at least three pipe wrench.

According to the invention created a way to automatically control the size of the throat of the drive jaw pipe wrench for gripping pipes of different diameters, containing the following steps:

the introduction of a hydraulic motor for driving the adjusting nut site, geared threaded connection with a hook pivotally connected to the head Assembly for pull-out hook relative to the head;

the introduction gidravlicheskogo motor in the reverse direction to sadhane hook relative to the head with the introduction of the pipe into the mouth of the drive jaw pipe wrench;

off hydraulic motor when reaching the contact of the hook and head with a pipe;

reversing the direction of rotation of the hydraulic motor for a predetermined period of time for discharge of the hook and head from ruby on a pre-defined distance to the application of torque to the pipe.

In the implementation of the method can be applied pneumatic logic unit for determining a predetermined period of time reversing direction of rotation of the hydraulic motor for a given pipe diameter.

The hook and the head may include the holders of the clamping jaw, and the direction of rotation of the hydraulic motor reversiruyut contact holders clamping jaw in contact with the pipe.

The steps of the method can be performed using the control unit, put into effect by the user.

Brief description of drawings

The invention can be better understood as the result of acquaintance with the accompanying drawings. The components shown on the drawings are not necessarily made to scale, and are presented to illustrate the principles of the invention. In the drawings the same numbers of positions indicated corresponding parts in the various views.

1 shows a perspective view of one embodiment of an automatically controlled node pipe wrench mounted on the support.

Figure 2 is a detailed view of the automatically adjustable host pipe wrench, shown by the circle a in figure 1.

Figure 3 is a perspective view of one embodiment automatically adjustable drive jaw pipe wrench used in the host pipe wrench, represented the military in figure 1.

Figure 4 is a view in a disassembled state variable driving the jaw of the pipe wrench, presented in figure 3.

figure 5 is an additional view in a disassembled state of the controlled host controlled drive jaw pipe wrench, presented in figure 4.

Figure 6 - side view of the mixing unit, presented in figure 4.

7 - section 7-7 figure 6 adjusting the node.

On Fig is a top view of the automatically adjustable drive jaw of the pipe wrench in separated position.

Figure 9 - section 9-9 figure 6 drive jaw of the pipe wrench.

Figure 10 is a top view of the automatically adjustable drive jaw of the pipe wrench in a flattened position.

Figure 11 - section 11-11 in figure 10 drive jaw of the pipe wrench.

On Fig is a top view of the automatically adjustable drive the jaws of a pipe wrench, when the girth of its small-diameter pipes.

On Fig is a top view of the automatically adjustable drive the jaws of a pipe wrench, when the girth of its large diameter pipes.

On Fig is a block diagram of one example of an adjustable Assembly.

On Fig - schematic diagram of the components of the control circuit used to control the motor and reversing direction of motor movement, through the use of pneumatic logic devices, for discharge from the rear side is her clamping jaw from the chimneys.

On Fig - block diagram of automatic control system for a variety of actuating the jaws of the pipe wrench installed on an interlock for gripping pipes of various sizes.

Detailed description of the invention

1 shows a perspective view of a variant of implementation of the automatically controlled node 100 a pipe wrench, and self-regulating pipe mechanical key 102 mounted on the support Assembly 104. The support Assembly 104 consists of a solid support columns 106, containing the extension 108. C-shaped head 110 (or bearing block) is mounted on the end of the cable 108, opposite to the column 106, to maintain and hanging pipe mechanical key 102 and node 100 a pipe wrench over the mouth of oil wells.

On the column 106 of the support Assembly 104 mounted on the carriage 105. Using truck 105 through the use of hydraulic motors and cylinders can rotate the extension tube 108 relative to the column 106 in the horizontal direction and to move the extension 108 up and down along the column 106 in the vertical direction. Also through the use of hydraulic motors and cylinders can move the extension 108 in the longitudinal direction, in extended or retracted position of the C-shaped head 110 relative to the column 106. Through horizontal, the slight pressure from the beginning and longitudinal movement of the extension 108 and the C-shaped head 110 relative to the column 106 provide the opportunity using the support Assembly 104, adjusting the position of the controlled node 100 a pipe wrench, pipe and mechanical key 102 relative to the wellhead pits for doctrove and/or pipe connections. In addition, the C-shaped head 110 can be tilted relative to the extension 108 to allow the screwing and unscrewing of the connection tubes arranged not vertically but rejected at a small angle from the vertical.

In addition, the regulated node 100 a pipe wrench can be mounted on C-shaped head 110 through sets of connecting links, which can be provided with the possibility of rotation of the controlled node 100 a pipe wrench, outward to the left in a counterclockwise direction, when it is used for unscrewing pipe connections. Similarly, when assembling pipe joints with connecting links provide the ability to rotate the controlled node 100 a pipe wrench on the outside, to the right or in a clockwise direction.

Figure 2 shows a detailed view of an automatically controlled node 100 a pipe wrench, highlighted by a circle a in figure 1. As shown in figure 2, the node 100 a pipe wrench, in the illustrated example includes three jaws 200, 202, 204 pipe wrench mounted at a distance from each other in the vertical direction us-shaped head 110 of the extension 108, mounted on the support Assembly 104 so that each upper, middle and lower jaws 200, 202, 204 of the pipe wrench are located in the horizontal plane. The upper and lower jaws 200, 204 pipe wrench identical, in the illustrated example, and is oriented in the same direction so that the lower jaw 204 pipe wrench is located directly under the upper jaw 200 pipe wrench. The average jaw 202 pipe wrench mounted in the opposite direction relative to the upper and lower jaws 200, 204 pipe wrench and adapted to the application of torque to the pipe, put into the mouth of the jaw of the pipe wrench in the opposite direction to the upper and lower jaws 200, 204 pipe wrench. Mouths of the jaws of the pipe wrench of each set of jaws 200, 202, 204 of the pipe wrench are adjusted relative to each other position in a vertical direction at the circumference of the pipe and to communicate with pipe mechanical key 102 for screwing and unscrewing of the connection pipes for introduction or extraction of oil wells, over which hung the node 100 a pipe wrench, pipe and mechanical key 102.

In the variant presented in figures 1 and 2, all three jaws 200, 202, 204 pipe wrench identical, except that, as explained above, the average jaw 202 trubner the key is oriented in the opposite direction relative to the upper and lower jaws 200, 204 pipe wrench. For this reason, the detailed description of one jaw of the pipe wrench, apply to all illustrated the jaws of the pipe wrench. For convenience, the average jaw 202 pipe wrench described in detail below.

Figure 3 shows a perspective view of a variant of implementation of the automatically adjustable drive jaw 202 pipe wrench used in the node 100 a pipe wrench, presented in figure 1 and 2. Figure 4 shows a view in a disassembled state variable driving the jaw of the pipe wrench, presented in figure 3.

In the version presented on Figure 3, 4, jaw 202 pipe wrench contains a hook 302 having a shank 412, the end of which is threaded, the head 306 and adjusting wrenches node 304. Hook 302 pivotally connected to the cylinder 306. A regulating unit 304 hinged to the cylinder 306.

Jaw 202 pipe wrench further comprises two assemblies 316 and 318 holders clamping jaw to clamp pipe connections. For clamping pipes with high torque and pressure Assembly 316 of the holder clamping jaw hook pivotally connected to the hook 302, and the Assembly 318 holder clamping jaw heel pivotally connected with the pivoting block 308.

As shown in figure 3 and 4, the head 306 includes upper and lower plate 312 and 402, the upper and lower backup plate 310 and the upper and lower the second housing 404 hinges (called together the Assembly of plates"), which are connected together using welding processes through which create a solid Assembly of plates. These assemblies plates remote from each other in the horizontal direction so that they form a hole adapted for accommodation of the shank 412 hook 302. The upper and lower Assembly plates bonded to one another via a swivel block 308 clamping jaw and through bolts and nuts. Swivel block 308, the Assembly of the plates and the bolts and nuts are used to attach the Assembly of plates one to another to maintain a constant position between the Assembly plates, which contribute to the formation of apertures for passage of the shank 412.

The shank 412 hook 302 is flat with the top and bottom sides, and the upper and lower surfaces of the shank are located in horizontal planes near the top and bottom plates 312, 402. In General, vertical opposite side of the shank 412 part of the shank 412, remote from the hook end of the hook 302, threaded 414. Adjusting wrench node 304 of large diameter adapted for threaded to mate with the shank 412 hook 302. The interaction between the hook 302 and adjusting the node 304 is such that during the rotation of the adjusting node 304 jaw 202 pipe wrench is diluted or reduced to the desired on what ogene regarding specific diameter of pipe connections. In addition, a regulating unit hinged to the cylinder 306 so that the hook 302 and a regulating unit 304 rotates to a predetermined vertical axis relative to the head 306 through swivel adjustment node 304 with a head 306, located near the upper and lower swivel housings that use articulated sleeves 407, articulated fingers 408 and the holders 406 hinge bushings. Can also be used (optional) base plate 314 to install limit switches.

Figure 5 shows an additional view in a disassembled state of the mixing unit 304 adjustable drive jaw 202 pipe wrench, presented in figure 3 and 4. As shown in the drawing, a regulating unit 304 includes wrench node 502, designed for threaded mating with the end of the shank 412 hook 302. A stationary outer housing 504 is adapted to accommodate rotating wrench node 502. Node 502 is put into rotation by a hydraulic motor 506. All regulating unit 304 is attached to the cylinder 306 through the use of upper and lower swinging arms 508, 510 attached to the upper and lower parts of the outer casing 504 through the use of bolts 520, passed through the upper bearing blocks 512, 514 and lower bearing blocks 516, 518, loc is defined in the outer housing 504, and nuts 522. The free ends of swinging arms 508, 510 pivotally connected with the upper and lower housings 404 hinges, hinge bushings 406 and articulated fingers 408, 410 head 306 by means of the upper and lower pivot bearings 524, 526, respectively. The free ends of swinging arms 508, 510 have built articulated fingers 540, 542 protruding from them, which are introduced into holes 544, 546 of the upper and lower pivot bearings 524, 526 to allow rotation of the adjusting node 304 and hook 302 relative to the head 306.

Hydraulic motor 506 is attached to the outer housing 504 via a connecting plate 532, spacers 530 engine mount attached to the connecting plate 532 between the engine 506 and outer housing 504 by means of bolts 534 and washers 536. Allen node 502, the outer body 504, the connecting plate 532 and the spacer 530 for mounting motor contain (each component of) the center hole, which combine in the Assembly for the introduction of the hex shaft 528. One end of the hex shaft result in rotation of the engine 506, and the opposite end of the hex shaft 528 is associated with the node 502 for communicating the rotation of the wrench node 502 as clockwise and counterclockwise. To pair hex shaft 528 order of rotation of the node 502 combining Central hole in the node 502 done is but a hexagonal shape for reliable mates with the hexagonal shaft 528 and to facilitate rotation of the wrench node 502 via hex shaft 528.

Figure 6 depicts a side view of the adjusting nut node 304, presented in figure 4. In the assembled state wrench node 502 mostly located inside the outer casing 504. To the upper and lower parts of the outer casing 504 bolted 520 upper and lower rocker arms 508, 510. The upper and lower rocker arms 508, 510 pivotally connected to the hinge supports, 524, 526, respectively, for swivel adjustment node 304 with a head 306 as shown in figure 3.

The fastening of the connecting plate 532 to the outer housing 504 by means of bolts 534 and washers 536 additionally shown in Fig.6. To the connecting plate 532 is also attached spacer 530 for mounting the motor, whereby the hydraulic motor 506 is attached to the rear end of the adjusting node 304.

Figure 7 shows a section 7-7 on figure 6 of the mixing unit. Figure 7 shows the screw hole 702 in a regulating unit 304 to enter the threaded end of the shank 412 hook 302. The hole 702, on its circumference, threaded 704 for threaded engagement with the thread 414 at the end of the shank 412 hook 302. Next to the screw hole 702 is the cavity 706 containing side walls 708 and the end wall 710 for insertion end 414 of the shank of the hook 302 during retraction of the hook 302 in the pivoted position by rotation of the node 502 is about a clockwise direction, resulting in the end 414 of the shank enters the cavity 706.

On Fig, 9, 10, 11 depicts a drive jaw 202 pipe wrench in diluted and mixed positions, respectively. While preparing to capture the connection pipe hook 302 is moved to the extended position through the introduction of a hydraulic motor 506, which rotate the node 502. In the illustrated embodiment, the jaw 202 of the drive pipe wrench, you can cover the pipe a predetermined diameter, for example 3 inches (76.2 mm), without any additional adjustment. However, to cover the jaw 202 of the drive pipe wrench pipe of larger diameter than the predetermined diameter, jaw 202 of the drive pipe wrench should be diluted sufficiently wide to cover the larger diameters. Accordingly wrench node 502 rotates counterclockwise to move the shank 412 hook 320 output from the mixing unit 304, thus pushing the hook 302 in the raised position for engagement of the connecting pipes of larger diameter.

On Fig depicts a top view of the jaw 202 automatically controlled drive pipe wrench, with the hook 302 shown in separated position to cover the connection of pipes of larger diameter. Figure 9 shows a section along 9-9 figure 6 drive jaw pipe wrench, where the azan the end of the shank 412 hook 302, the speaker, so that only a small part of the end of the shank 412 is located in the cavity 706 node 502.

Similarly, figure 10 depicts a top view of the automatically adjustable drive jaw 202 pipe wrench in a flattened position, adapted to cover the pipe of smaller diameter, for example 3 inches (76.2 mm). Figure 11 shows a section along the 11-11 in figure 10 drive jaw pipe wrench, which shows the end of the shank 412 hook 302 allocated in such a way that the end of the shank 412 hook 302 is completely in the cavity 706 node 502.

On Fig depicts a top view of the automatically adjustable drive jaws 202 a pipe wrench, when the occupation of pipes of small diameter. On Fig depicts a top view of the automatically adjustable drive jaws 202 a pipe wrench, when the occupation of large diameter pipes. As shown in Fig and 13, by adjusting the node 304 can pull or push the Assembly of the hook through the use of a threaded coupling end of the shank 412 hook 302 to enable information jaw 202 pipe wrench to clamp tight enough to be grasped pipes 1200 small diameter, as represented in Fig, or to capture a large diameter pipe as shown in Fig.

On Fig presents a block diagram 1400 illustrating one example of the mixing unit 304. the La capture large-diameter pipes, drive the jaw 202 pipe wrench first to throw at step 1402 widely enough to cover the pipe of the appropriate diameter through the introduction of the hydraulic motor 506 in the direction in which the hook 302 extend in the direction from the head 306. After the introduction of the pipe into the drive jaw 202 pipe wrench (step 1404), the movement of the hydraulic motor 506 reversiruyut, reducing the drive jaw 202 pipe wrench, by moving the hook 302 inward toward the cylinder 306 until such time as the holders 316, 318 clamping jaw or come into contact with the pipe at step 1406. When the contact holders 316, 318 clamping jaws with the pipe operator turns off the hydraulic motor 506 at step 1408. When shutting down the engine 506, the system then uses pneumatic logic device to reverse the movement of the engine during a predetermined period of time for discharge of the holders of the clamping jaw in the direction from the pipe at a predetermined distance defined depending on the pipe diameter on the stage 1410.

On Fig presents a schematic diagram 1500 of the components of the control circuit used to control the hydraulic motor 1502. As shown in the drawing, the components of the control circuit contains a guide valve 1504, communicated with the number who eat 1502. Using the guide valve 1504 control the direction of rotation of the hydraulic motor 1502. In the composition of the components further includes the logical device 1506, which in this case is a logical device or the first and second controlled valves 1508 and 1510 delay timer "off" 1512, the delay timer "on" 1514 and single pole switch 1516 in two directions.

The control system is designed in such a way that it was used pneumatic logical device (logical device 1506 "or") to reverse the direction of rotation of the engine 1502 when the contact holders 316, 318 clamping jaws with the pipe. The direction of rotation of the engine reversiruyut for a predetermined period of time for discharge of the holders 316, 318 clamping jaw from the pipe at a predetermined distance, as shown in Fig, step 1410. In this description, when moving the holders of the clamping jaws 316, 318 in the direction of the tube, it is customary to say that the engine 1502 moves forward. When moving the holders of the clamping jaws 316, 318 in the direction from the pipe after contact with it, to say that the engine 1502 moves in the opposite direction (reverse).

To ensure movement of the engine 1502 forward enforce tropolys the th switch 1516, and pneumatic operated valves 1508, 1510 close, thus giving effect to the scheme of time consisting of time delays "on" and "off" 1514, 1512. Pneumatic single pole switch 1516 in two directions give effect to using a switch with a spring load, which is returned to the middle position when switched off.

As shown in Fig, to signal the movement of the engine 1502 in the opposite direction (reverse) include pneumatic pole switch 1516 in two directions, resulting in a direct connection of the switch 1615 guide valve 1504.

Diagram of the timing system consists of a timer delay 1512 "off" delay timer "on", each of which contains one channel for compressed air, one warning device and one output. While the timer signal on the reduction to zero of the pressure of compressed air; an inner valve provide compressed air for a predetermined period of time. After expiration of a predetermined period of time, the timer interrupts the connection of the inner valve and stops the flow of compressed air. Thus, the timer interrupts the supply of compressed air to directing valve 154 to stop the operation of the engine 1502 in the opposite direction.

When you initially turn on the system using the delay timer "on" provides a delay of supply of compressed air to the delay timer "off". This delay provides the ability to perform the timer "off" one time cycle for the initial creation of pressure in the circuit.

On Fig presents the block diagram of automatic control system for a variety of actuating the jaws 200, 202, 204 pipe wrench mounted on the support Assembly 104 (Fig 1 and 2) for gripping pipes of different sizes. Through the use of automatically-controlled actuation of the jaws 200, 202, 204 pipe wrench jaws of the pipe wrench can be remotely operated from the control panel, which, as shown in Fig may contain block 1602 management and user interface 1604. Block 1602 management adapted to the regulation of actuating the jaws 200, 202, 204 pipe wrench through management action, including the direction of movement of the engine 506, which is required for gripping pipes of different diameters. For example, using block 1602 control of the operator using the user interface 1604, dilute drive jaw of the pipe wrench to ensure a sufficiently wide throat to capture the joints of pipes of large diameter, which is required to assemble or disassemble with the help of Privod the x jaws 200, 202, 204 of the pipe wrench. Although dilution and mixing of actuating the jaws 200, 202, 204 pipe wrench, the operator can be controlled using the control unit 1602, block 1602 control can be equipped with a program that contains predefined settings for various sizes of pipes, which can be similar to pipe sizes 1200, presented at Fig. When this block 1602 management, on the basis of predefined settings, can dissolve drive the jaws 200, 202, 204 pipe wrench to ensure a sufficiently wide throat to grip pipe of this diameter by controlling the operation of the engine 506 (see figure 10). In addition, using block 1602 control, when the pipe is already covered by actuating the jaws 200, 202, 204 pipe wrench, you can turn the engine 506 to rotate the wrench node 502 to contact holders 316, 318 clamping jaws with the pipe. After contact holders 316, 318 clamping jaws with the pipe, then take away from the pipe by reversing the rotation of the motor for a predetermined period of time. Depending on the level of security the capabilities of the block 1602 control and programmed processes stored in memory, the user can fully or partially control the action of the engine 506 by the introduction and/or execute commands stored in memory block 1602 control the population.

When using block 1602 management in conjunction with many of actuating the jaws 202 a pipe wrench, as shown in Fig, regulation of the jaws of the pipe wrench can be performed simultaneously. In an alternative embodiment, the control of each jaw of the pipe wrench can be executed in sequence. In any case, thanks to the automatic regulation of the jaws of the pipe wrench (without the need for manual regulation) reduce to the minimum regulation. In addition, increase safety action of the jaws of the pipe wrench by reducing to a minimum the contact of the operator with the jaws of the pipe wrench.

Specialists in the art it should be clear (and they can appreciate it)that one or more processes, sub-processes or steps of the processes described with reference to Fig-15, can be controlled using hardware and/or software. If the process is performed using software, the software may reside in the memory storage device (not shown)in the respective electronic processor component or system, for example, in one or more functional components or modules, schematically presented in Fig and 15. Software the storage device may contain an ordered list of commands, which can be executed to perform logical functions (i.e., "logic", which may be implemented either in digital form such as digital circuitry; either as source code or in analog form such as analog circuitry; or in the form of an analog source such an analog electrical, sound or video signal), and may be selectively embodied in any machine-readable medium for use by or in conjunction with a system, apparatus, or device to execute commands or to use in conjunction with them, for example, system on the basis of a computer system containing a processor, or other system that may selectively to select commands from a system, apparatus, or device to perform commands and execute commands. In the context of this application under "machine-readable medium" is understood any means that can contain, store or communicate the program for use by the system, apparatus, or device to execute commands or in combination with them. Machine-readable medium may selectively be, for example, (but the medium composition is not limited to this list) electronic, magnetic, optical, electromagnetic, infrared or semiconductor system, apparatus or device. More specific examples (but, however, this is not the IP is ecyuiui list) machine-readable media include the following: a portable computer diskette (magnetic medium), random access memory (e-environment), a persistent storage device (e-environment), erasable programmable permanent memory or flash memory (electronic media) and a portable compact disc (optical). It should be noted that the machine-readable medium could even be paper or another appropriate medium, on which is printed the program, as the program can be electronically read, for example, by optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed, if necessary, and then stored in the computer's memory.

The above description of the implementation is presented for the purpose of illustration and description. It is not exhaustive and does not limit the claimed invention to the exact form disclosed in this description. Modifications and variants can be made in light of the above description or can be obtained in practice of the invention. For example, although in the above description and the drawings illustrates the use of a hydraulic motor 506 to drive the adjusting nut node 304, other types of motors used to rotate mechanically coupled components, for example, a pneumatic motor or electric is a mini-motor, can also be used to drive the adjusting nut node 304, the proposed invention. In addition, although in the above-illustrated examples of the implementation of the shows host pipe wrench, mounted on C-shaped head support Assembly containing the extension, the host pipe wrench can also be hung over the mouths of the wells and pits for the two tubes with the use of suspension systems, for example, regalement suspension system or other known suspension systems used in industry for hanging nodes pipe wrenches or nodes of the drive pipe wrenches over the mouths of the wells or pits for docrobot. In addition, the drive jaw pipe wrenches or pipe wrenches according to the invention may be sold separately as part of the host pipe wrench or as part of a system containing a support or suspension system, and the host pipe wrench, which may contain or not contain a pipe mechanical key. The claims and its equivalents defined the scope of the invention.

1. The drive system of the jaws of the pipe wrench for engagement and application of large torque to the pipe with threaded connections, containing at least one pipe wrench containing a head and a hook to engage the pipe, adjusting wrench node for pull-out and sadhane hook of trubs is th key relative to the head, a motor, mechanically connected with the adjusting wrench node to drive the node to pull-out and sadhane hook a pipe wrench, and a control unit associated with the engine to control the engine.

2. The drive system of the jaws of the pipe wrench according to claim 1, in which the motor is a hydraulic motor.

3. The drive system of the jaws of the pipe wrench according to claim 1, in which the control unit includes a user interface.

4. The drive system of the jaws of the pipe wrench according to claim 1, in which the hook includes a shank fitted on the end of the thread, the head contains a hole for introducing the end of the shank of the hook and pass passes the end of the shank through the hole in the head to engage the threaded end of the shank with the adjusting wrench node.

5. The drive system of the jaws of the pipe wrench according to claim 1, in which the adjusting nut Assembly pivotally connected to the head.

6. The drive system of the jaws of the pipe wrench according to claim 1, in which the hook is hinged to the head.

7. The drive system of the jaws of the pipe wrench according to claim 1, additionally containing a node of the pipe wrench, containing at least three pipe wrench.

8. The drive system of the jaws of the pipe wrench according to claim 7, further containing an Assembly of a support containing a column, the cable passing from one end of the t columns and contains the bearing block, attached to the extension at its opposite end, to maintain the host pipe wrench.

9. Driving the jaw of the pipe wrench for engagement and application of large torque to the pipe with threaded connections, containing a hook having a shank, fitted with a threaded head, which is adapted for introduction into it of the threaded end of the shank of the hook, and adjusting wrenches node is equipped with a hydraulic drive, setuplayout with a threaded end of the shank of the hook located on the end of the head opposite the hook.

10. Driving the jaw of the pipe wrench according to claim 9, in which the adjusting wrench node hinged to the head.

11. Driving the jaw of the pipe wrench of claim 10, in which the hook is hinged to the head.

12. Automatically adjustable knot pipe wrench for engagement and application of large torques to a column section with a threaded connection, containing a support Assembly having a casing, an extension cord, passing from one end of the column and containing a bearing block attached to the extension at its opposite end, and a lot of pipe wrenches that contains the head, the hook and the adjustment nut Assembly, equipped with a hydraulic drive, for pull-out and sadhane hook pipe wrench relative to the head.

13. The host pipe wrench on the .12, in which the hook includes a shank fitted on the end of the thread, the head contains a hole for introducing the end of the shank of the hook and pass the end of the shank through the hole in the head to engage the threaded end of the shank with the adjusting wrench node.

14. The host pipe wrench indicated in paragraph 12, in which the adjusting wrench node hinged to the head.

15. The host pipe wrench indicated in paragraph 12, in which the hook is hinged to the head.

16. The host pipe wrench on section 12, containing at least three pipe wrench.

17. A way to automatically control the size of the throat of the drive jaw pipe wrench for gripping pipes of different diameters, containing the following steps:
the introduction of a hydraulic motor for driving the adjusting nut site, geared threaded connection with a hook pivotally connected to the head Assembly for pull-out hook relative to the head;
the introduction of the hydraulic motor in the opposite direction to sadhane hook relative to the head, with the introduction of the pipe into the mouth of the drive jaw pipe wrench;
off hydraulic motor when reaching the contact of the hook and head with a pipe;
reversing the direction of rotation of the hydraulic motor for a predetermined period of time for which edenia hook and head from the pipe at a predetermined distance prior to the application of torque to the pipe.

18. The method according to 17, in which use pneumatic logic unit for determining a predetermined period of time reversing direction of rotation of the hydraulic motor for a given pipe diameter.

19. The method according to 17, in which the hook and the head contain the holders of the clamping jaw, and the direction of rotation of the hydraulic motor reversiruyut contact holders clamping jaw in contact with the pipe.

20. The method according to 17, in which the steps are performed using the control unit, put into effect by the user.



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to pipeline joints, for example, coupling and nipple joint. Machine comprises headstock (4), nipple clamp-and-revolve chick (5), rpm first transducer (6) of first element (1) arranged at headstock (4) and articulated with headstock (4) drive shaft, pipe (3) rpm transducer (7) to interact with pressure roller (8), clamp (9) arranged to slide along pipe (3) axis and force transducers (10) arranged at opposite sides of clamp (9). Said clamp (9) is equipped clamping chuck (11) rigidly jointed with rotary shaft (12) and two-arm lever (13) interacting with force transducers (10). Pipe (3) rests on supports (14) of frame (15). Machine control system (16) incorporates a display (17).

EFFECT: reliable tightening of the joint between two pipes.

2 dwg

FIELD: machine building.

SUBSTANCE: combined grab retraction control mechanism includes a gripping tool with radial gripping elements and a grab retraction control mechanism containing an annular housing with a central inner channel and a peripheral outer surface, stiff spokes and guide spokes located on the annular housing so that they can radially move from retracted position to engaged position. According to the method of enlarging the grab working range, the gripping tool is provided with radial gripping elements; the above grab retraction control method is provided; the item or the cylindrical gripping tool is installed in a central inner channel of the annular housing and the other item or the cylindrical griping tool around peripheral outer surface of the annular housing with spikes located in annular space between gripping elements of the gripping tool and the item. One end of each spoke is engaged with gripping elements, and the other end of each spoke is directly or indirectly engaged with the item; gripping elements of the gripping tool are moved radially so that gripping elements can exert pressure on the first end of each spoke. Besides, spokes are radially moved from retracted position to extended position and act as radial extension pieces of gripping elements of the gripping tool.

EFFECT: providing transfer of axial and torsional loads on the gripped tube item or from it; enlarging the grab working range.

16 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: hydraulic clamping device comprises a clamp set on a support inside a frame to which a hydraulic cylinder casing is rigidly fixed, the hydraulic cylinder includes a piston and is capable of producing force directed along the longitudinal axis of the hydraulic cylinder and applied to the clamp. An intermediate component is adjacent to the hydraulic cylinder piston and the clamp, one of its ends is fitted by a spherical end section included in the spherical support set in the piston.

EFFECT: reducing forces applied to hydraulic cylinder piston and pushing the clamp in the directions different from the hydraulic cylinder longitudinal axis.

8 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: method consists in movement of a housing of a continuous circulation tool to an adapter having a channel passing through it and intended for connection in a pipe string in the well and selective movement of drilling fluid between the housing and a side hole in the adapter; in addition, the continuous circulation tool includes a shutoff device, and actuation of a shutoff mechanism to introduce a shutoff element of the shutoff device through the side hole in the adapter for insulation of drilling fluid flow through at least one section of the channel. A system for carrying out well operations with continuous circulation of drilling fluid, which contains a continuous circulation tool interconnected with a tubular column of the well, which contains an adapter and is intended for selective shutoff of the drilling fluid flow to tubular column of the well, a pipe manipulating device near the adapter, which contains the following: a pipe wrench, pipe wrenches, a pipe wrench, a retaining wrench, a pipe wrench and a spinning wrench and a device for mechanised suspension and unscrewing of pipes.

EFFECT: maximum drilling speed.

34 cl, 27 dwg

FIELD: construction.

SUBSTANCE: support unit of a hydraulic wrench rotor includes support elements arranged in the body and contacting with the end surface of the geared rim and the cylindrical external surface of a split gear of the rotor, besides, support elements are made of two cylindrical support plates installed in the body and joined together, having cavities along the inner diameter in the place of their connection, at the same time the end surface of the geared rim and the cylindrical outer surface of the split gear of the rotor contact with appropriate surfaces of the support plates cavity arranged from a composite material.

EFFECT: increased reliability of device operation with simultaneous simplification of design and cheapening of assembly and repair.

4 dwg

FIELD: machine building.

SUBSTANCE: rotor assembly of hydraulic wrench includes a drive rotor located in the wrench housing and having a connector, rollers contacting the drive rotor and a split bushing with jaws with plates, which are installed in it. Assembly is provided with two moving jaws with plates, which are mirror-like located symmetrically relative to axis of split bushing with a fixed jaw; at that, moving jaws have shaped curved convex and concave surfaces contacting the rollers.

EFFECT: improving operating reliability of the device and improving the productivity owing to reducing the number of readjustments during operation with pipes with simultaneous simplification in operation.

1 dwg

FIELD: machine building.

SUBSTANCE: invention refers to tubular products gripping and manipulation tool. Gripping tool has gripping surface that is borne against movable gripping elements and control mechanisms for radial movement of the gripping surface from retracted to extended position. Gripping tool includes control mechanisms comprising at least one control mechanism with three cam clutches, which in its turn includes drive cam clutch receiving the input rotation and tending to the rotation transfer; intermediate cam clutch receiving the input rotation only from drive cam clutch; driven cam clutch receiving the input rotation only from intermediate cam clutch; drive cam pair acting between drive cam clutch and intermediate cam clutch so that input rotation is transmitted by drive cam pair from drive cam clutch to intermediate cam clutch, and driven cam pair acting between intermediate cam clutch and driven cam clutch so that input rotation from intermediate cam clutch is transferred by driven cam pair to driven cam clutch.

EFFECT: providing the control of axial and radial movements of gripping tool surface.

10 cl, 13 dwg

FIELD: machine building.

SUBSTANCE: required values of detachment pressure are determined on the basis of rod size and/or pipe dog type. The upper and lower limits for permissible values of rod detachment pressure may be calculated on the basis of the required pressure of detachment and/or rod size. Values of rod detachment pressure below the lower limit and above the upper limit specify the necessity to analyse the rod condition in order to identify whether this rod may be used repeatedly. The values of rod detachment pressure may be recorded as data of detachment pressure for subsequent assessment, including detection of improper unscrewing of rods and poor condition of a well.

EFFECT: invention provides for identification of pipes that require replacement.

25 cl, 13 dwg

FIELD: machine building.

SUBSTANCE: top drive comprises gripping device jointed thereto and arranged there under, and four grippers each being arranged on piston with gripping cylinder. Proposed method of pipe gripping above top drive comprises activating pistons and cylinders of above said device. Invention covers also top drive with drive shaft, component coupled with said shaft and gripping device with mouth suspended to top drive and provided with first splined element. Note here that said component has second splined element for engagement with first splined element to selectively decelerate component rotation for unlocking the joint with top drive driving shaft. Note also that gripper comprises two parts that move for opening the mouth. Proposed method comprises engaging said second splined element and decelerating component rotation for unlocking the joint.

EFFECT: normal operation of top drive, easier installation, smaller installation space.

30 cl, 6 dwg

FIELD: oil and gas production.

SUBSTANCE: heat breaker consists of base member and of steam generator. The latter has a handle connected to a case with bushings and screws. In the case there is installed a container consisting of a tubular electric heater, of heat carriers and of a shedding screen. Also, heat-insulating material and shutters equipped with the heat screen and movably connected to the case by means of loop are positioned between the case and the container. A mechanism of shutters opening consists of ears, a cable, a lever and springs closing the shutters. A mechanism of fluid supply to the heat carrier corresponds to a compartment with a removable cover wherein there is arranged a spring loaded tube with a valve, while a cover-stop is set above the container with screws.

EFFECT: reduced stress in threaded connections of pipes before their unscrewing, enhanced efficiency of threaded connections in oil pipes; upgraded quality and reliability of threaded connections during pipe unscrewing; increased service life of pipes.

6 dwg

FIELD: drilling oil and gas wells; devices for screwing and unscrewing casing pipes.

SUBSTANCE: proposed wrench includes power unit in form of electric motor, hydraulic pump with constant power regulator and tank filled with working medium. Actuating mechanism includes hydraulic motor, gearbox, rotor with pipe grip, movable doors with locks and hydraulic distributor. Constant power regulator is provided with delay unit in form of prestressed spring. Axial-flow piston-type pump is used as hydraulic pump; it is provided with movable unit with spring and its pistons are arranged in inclined position. Constant power regulator inlet is connected with main hydraulic line and its outlet is connected with cylindrical movable unit of hydraulic pump. Constant power regulator may be switched-off by delay unit. Regulator is switched on when output power of power unit and output of hydraulic pump reach the magnitudes preset by the following formulae: where N, are respectively output power and normal output power of power unit; Q are respectively output and nominal output of hydraulic pump; P are respectively pressure and nominal pressure of working medium in hydraulic line, k is proportionality factor equal to 1.

EFFECT: enhanced efficiency, reduced wear; increased universality factor.

4 dwg

FIELD: drilling equipment, particularly devices adapted to lower and lift drill string.

SUBSTANCE: device includes connection parts formed on drilling pipe sections, for instance as sleeve or male half of tool joint with tool-joint threads, rotary key for above members and supplementary means. Supplementary means have cavities with sensors and is built in drilling string. The means are also provided with detachable reinforcing clamp made as bails connected one to another. The bails are arch-shaped and plate-type and are pivotally connected one to another. Inner bail surfaces have extensions inserted in grooves formed in supplementary means so that groove dimensions correspond to that of bail extensions.

EFFECT: reduced size of lock connection and increased free space for measuring tools installation.

3 cl, 4 dwg

FIELD: mechanical engineering, particularly connecting or disconnecting drilling and casing pipe couplings or joints.

SUBSTANCE: key is divided into separate independent technological units and has upper and lower bodies with connectors in front parts thereof. Built in the front parts are toothed rotor wheels in which pipe clamping means are arranged. The key also has gear and intermediate gear assemblies, common drive to rotate and stop the pipes. The drive comprises differential and high-speed reduction gears with hydraulic motors. Upper body may be rotated about pipe clamping means axis to lift or lower thereof relative lower body. The body is provided with thread torqueing/loosening means, braking means and means to supply process lubricant to threaded nipple part of pipe to be screwed on. Lower body has thread torqueing/loosening means. The key also comprises positioner provided with horizontal and vertical key displacement mechanisms.

EFFECT: extended functional capabilities, reduced time to replace clamping members of upper and lower key executive tools and braking system members, increased reliability of device units, increased load-bearing capacity of pipe interlocks.

3 cl, 6 dwg

FIELD: mechanical engineering, particularly connecting or disconnecting pipe couplings or joints, spinning wrenches adapted to connect drilling and casing pipes.

SUBSTANCE: device comprises rotary gear with connector provided with pentahedral profile from inner side thereof and cartridge built in the pentahedral profile. The cartridge has upper and lower discs with four clamping means arranged between them in radial direction. The clamping means are made as shuttle mechanisms comprising bodies and jaws with hard-alloy dies. The bodies are built in guiding cartridges and may perform radial movement during rotary gear rotation. Movable pins are built in clamping device body. Projected pin ends mate projections made in cups. The cups are arranged between cartridge discs and provided with spring. Jaw with die is connected with the body by pin so that after pin disconnection the body may be removed from the guiding cartridge.

EFFECT: increased reliability along with increased load-bearing capacity.

2 cl, 3 dwg

FIELD: mechanical engineering, particularly drilling string and casing pipe connection equipment.

SUBSTANCE: method involves stopping one pipe and rotating another pipe for screwing and unscrewing of above pipes with the use of hydraulic drive and braking system to transmit differently directed torques with the same data along with reactive moment reduction by drive and braking system. Device comprises two coaxial power tongs. Each power tong includes body and pipe squeezing mechanism. The power tongs have common drive including high-speed reducer and differential block kinematically connected one to another. Differential block comprises body with outer and inner toothed crowns, planet carrier with three satellites installed on the carrier, the first tong arranged in body, driven gear kinematically connected to planet carrier and the second tong installed in the body and adapted to cooperate with corresponding gears of pipe squeezing mechanisms. Pipe squeezing mechanism of the first tong is fixedly secured to braking pulley of braking system installed on the first tong body. The braking system comprises four pressing shoes and cylindrical case with hydraulic cylinder for shoe pressing arranged so that cylindrical case may rotate with pulley and pipe squeezing mechanism of the first tong relative pipe squeezing mechanism axis. The cylindrical case is additionally provided with two rests. One rest is fixedly connected with cylindrical case and cooperates with two hydraulic cylinders, which are adapted for thread tightening/unfastening. Another rest is connected with cylindrical case by hinged axis and also cooperates with two other hydraulic cylinders, adapted for thread tightening/unfastening, which provides elimination of reverse reaction and increase of pipe squeezing mechanism torque and locking moment.

EFFECT: possibility to use one drive provided with differential gear to perform screwing/unscrewing operations.

2 cl, 2 dwg

FIELD: mechanical engineering, particularly means for connecting or disconnecting pipe couplings or joints.

SUBSTANCE: pipe wrench comprises body with openable flaps and locking mechanism, releasing rotor with jaws, braking means to provide automatic pipe clamping, hydraulic motor and tooth gears with satellites. The rotor comprises central and two side sectors. One side sector end has threaded orifice to receive regulator, which adjusts mutual sector location. The regulator is made as spherical threaded thrust having spherical part cooperating with end part of central rotor sector. Rotor-satellite spacing setting device, which specifies space between rotor and satellite axes is installed in wrench body. The spacing setting device is made as three cylindrical fingers cooperating with basic rotor surface and installed in threaded orifices formed in wrench body along longitudinal axis thereof. The fingers are also arranged in each openable flap at an angle to longitudinal axis.

EFFECT: increased operational reliability.

5 dwg

Tubular key // 2293837

FIELD: tubular keys.

SUBSTANCE: tubular key contains jaws with through grooves of "dovetail" type on end surface, replacement dies mounted therein, holders. On side surfaces of jaws, grooves of "dovetail" type are made, into which sliders are inserted for holding replacement dies along end surfaces. Through apertures are made in jaws, wherein spring-loaded holders for fastening sliders are inserted.

EFFECT: increased reliability of assembly for holding replacement dies of tubular key.

5 dwg

Machine spanner // 2295624

FIELD: deep drilling and maintenance of oil and gas wells.

SUBSTANCE: machine spanner contains greater and lesser jaws, jointly connected to handle-lever, which is provided with swivels for holding traction and insurance cables, holding toothed dies on aforementioned jaws, mounted in die holders, latch, jointly connected to larger jaw and adapted for interaction with lesser jaw. Larger jaw is made in form of one- or multi-layered (multi-row) packet of flexible resilient elements, on which a row of die holders is located. A packet of flexible resilient elements is made in form of highly durable ribbons or ropes, provided with eyes for connection of jaws to each other by means of fingers, and also with slit and handle-lever.

EFFECT: increased comfort of operation, decreased hazard of injury and increased lifetime.

4 cl, 7 dwg

FIELD: oil and gas well construction, particularly for casing pipes, flow strings and other technological pipes.

SUBSTANCE: pipe spinning-up method involves seating nipple end on one pipe in clutch end of another pipe, which is fixed from rotation; screwing-in nipple end of the first pipe into another one with increasing twisting moment; aligning mark formed on the first pipe with mark created on clutch end of another, fixed, pipe by rotation of nipple end of the first pipe as pipe ends touch each other; screwing-up nipple pipe end. Nipple pipe end at first is screwed-in by hand. Then above pipes are spun-up up to bringing clutch pipe end to level of transversal mark location on nipple pipe end or below above level. Screwing-up of nipple pipe end is carried out due to resilient deformation of thread members to obtain predetermined interference in threaded connection, seal belts and to achieve good air-tightness of pipe ends abutting each other by smooth shock free twisting moment increase at clutch end temperature of not more than 80°C up to bringing into register of nipple pipe end mark with additional mark formed at clutch end of fixed pipe and spaced apart from the first mark created on above pipe in pipe spinning-up direction, wherein the clutch pipe end is located at level of transversal mark formed at nipple pipe end or is below above end and spaced not more than 0.5 mm from above level.

EFFECT: possibility to demonstrate passed spinning-up stages and pipe assemblage termination due to provision of spaced marks bearing different information.

4 cl, 6 dwg

Sucker-rod tong // 2306403

FIELD: oil production, particularly Connecting or disconnecting pipe couplings or joints, namely means of mechanization of trips associated with sucker rods.

SUBSTANCE: sucker-rod tong comprises head with slot for sucker rod receiving and mounting orifices, handle connected to head to provide cooperation with carrier, fixer, which fixes tong engagement of sucker rod and torsion torque limiter, which limits torsion torque during sucker rod screwing together. Torsion torque limiter has torsion torque regulation means and includes resilient rod, clip and cutoff plate. Resilient rod is threadedly secured to box-like head and is off-centered with respect to sucker rod axis. Corner depression is formed at resilient rod end so that the depression is aligned with end thereof along depression radius. Roller secured to clip cooperates with the depression. Clip is installed on handle by means of pin and is spring-loaded towards handle pin as tong is installed in working position. Cutoff plate is installed on head. Cutoff plate has beveled part reverse to the corner depression of resilient rod. In working tong position roller of spring-loaded clip cooperates with the depression. Handle is supported by pin passing in mounting orifice of head and off-centered with respect to resilient rod and sucker rod axes.

EFFECT: improved operational conditions and decreased accident risk due to possibility to break mechanical connection between carrier and tong at predetermined tightening torque.

4 cl, 2 dwg

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