Machine spanner

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

 

Now the present invention relates to the field of deep drilling and servicing of oil and gas wells and, in particular, is a machine key, intended for use in zakreplenii, securing, make up and break out of the castle, coupling, and other threaded joints of drill columns and other (including tubing and casing) of the downhole oilfield tubular goods when spoke-lifting operations during drilling and repair of wells.

Known machine keys of different designs and sizes, used for screwing, unscrewing, re-tensioning and fastening borehole pipes in progress tripping (see, for example, "Handbook of overhaul of oil and gas wells", the authors Assasin, Savilov etc., M., "Nedra", 1973, p.93...96, and "Handbook of oilfield equipment, the authors Ehink, Asipahybol etc., M., "Nedra", 1983, str...182).

Also known machine key AS the USSR №793746, publ. 07.01.81, BI №1, 1981

See, in addition, the key KMT-M on the website WWW.EQP.RU in Annex I, as well as the key patent N 41735 from 23.03.95,

The lack of these keys is in the performance of heavily loaded parts of complex configuration method for steel castings high alloy steel with subsequent termoobrabotki is Oh. Due to the high load key, the limited strength of the material and the presence of difficult-to-remove casting defects such keys have to do with elevated margins. The keys difficult, inconvenient in use that increases the risk of injury when working with them. In addition, these keys are in contact with the pipe at a limited number of points and significantly damage its surface.

For the prototype of the proposed technical solutions can be adopted widespread razvenchivayuschie (high torque) chain key company Houston Engineers. Inc (see the Composite catalog of oil field equipment and services. 1995-96, Volume 2. Page 646 - Annex II).

This key includes the major and minor jaws, pivotally connected with the lever-handle, gripper dies on said jaws and a latch pivotally fastened with a large jaw and adapted to interact with a small jaw.

This key provides a wide angle of coverage of pipe with minimal damage to the pipe surface. However, it has a limited lifetime due to the presence of a large number of relatively thin hinge fingers, which quickly lose their mobility, since they operate outside of elasticity of the material in abrazivosoderzhaschih, corrosive environment. Such fingers couldn't meet the operating conditions (high C is grassendorf, poor lubrication)that makes such keys are not adapted to long-term cyclic operation in terms of execution tripping the drilling and maintenance of oil and gas wells.

The main technical task, which directed the claimed technical solution is to eliminate the above drawbacks and prototype and the creation of such a machine key, which design with relative ease would be the weight of the key, increasing convenience in use, reducing the risk of injury, increased reliability and longer service life in terms of compliance with tripping in the process of drilling and servicing of oil and gas wells.

Solving the above technical problem is achieved by the fact that the claimed native key includes the major and minor jaws, pivotally connected with the lever-handle, serrated gripping dies on said jaws installed in the other hand, and a latch pivotally fastened with a large jaw and adapted to interact with a small jaw. A characteristic design feature key is that most jaw made in the form of single or multi - layer (multi-row) package flexible elastic elements, such as high strength tapes having lugs for connection is alusta through my fingers between them, and with latch and lever-arm.

The other hand made a self-elasticity of the specified flexible elastic elements and due to turn in their sockets.

The lever-arm and a small jaw made of heat-treated hot - or cold-rolled plates, interconnected by means of the fingers, and (in the case of the lever) swivels for attaching the traction and safety ropes.

In addition, a large jaw of the wrench can be fitted arch insert which is bonded these flexible elastic elements.

The possibility of technical implementation of this present invention is proved by the extensive use in domestic and foreign practice tripping the drilling and maintenance of oil and gas wells machine keys with the locking of the jaws and multi polyspastny lifting devices containing steel rope, and the application for suspension of vehicles multilayer packages springs.

Technical characteristics which are distinctive for the claimed design machine key can be implemented by using the tools that are used in various fields, in particular in oilfield engineering (flexible elastic elements, including high-strength tape, wire, ropes, Ter is obrabotannye plate, fingers, mounting device, swivels and the like).

Reflected in the claims technical features necessary and sufficient for providing the solution of this problem is the creation of machine key, and the relative simplicity of construction, easier, more convenient operation, more safe, more durable and reliable.

In the future the present the invention is illustrated by examples of its execution is shown diagrammatically on the accompanying drawings on which:

Figure 1 - schematic illustration of the machine key in accordance with the proposed technical solution for casing pipes of large diameter (for example, 245 mm and above).

Figure 2 - schematic representation of the inventive machine key for drill and casing pipes with arched insert in large jaw (nominal diameter range from 95 to 203 mm).

Figure 3 is a view along arrow a on the latch, shown in figure 1.

4 is a schematic illustration of the inventive machine key for tubing, casing and drill pipes with arched insert in large jaw (conditional diameters ranging from 48 to 203 mm).

5 is a cross-section In In on a number of flexible elements figure 4.

6 is a rough place I figure 1 is a multilayer package from the increased amount of more thin flexible tape.

Fig.7 - lever-arm machine is ljuca, depicted in figure 1 (type B).

Machine key in accordance with the invention contains most 1 (figure 1) and small 2 jaw connected with the lever-arm 3 by means of pivot pins 4 and 5. The jaws 1 and 2 in the other hand 6 and 7 in a known manner established gripping toothed die 8. The latch 9 of a known type using the adjustable finger 10 is fastened with a large jaw 1 and is adapted to interact with a small jaw 2. Large jaw 1 is implemented as a single layer or multi - layer package high-strength flexible elastic elements 11, consisting, for example, of high-strength tape, provided with lugs 12 and 13 for connecting the jaw 1 with the lever-arm 3 and the latch 9 by means of pivot pins 4 and 10. Small jaw 2 is made, for example, from a set of heat-treated hot - or cold rolled plates interconnected in a known manner, and with the lever-arm 3 is articulated through the finger 5. The lever-arm 3, also from a set of heat-treated hot - or cold rolled plates with swivels 15 for securing the traction 16 and 17 safety ropes.

Figure 1 shows the machine key to work with casing pipes of large diameter, for example 245 mm and above.

Bearing elements large jaw 1 is made of high-strength tape, placed in the package 11 in one or more layers, on what oterom hosted a number of other hand 6, equipped with toothed plates 8. The other hand 6 are tilting in contact with the pipe 18.

The adjust to any misalignment of the other hand is achieved by the elasticity of the flexible element 11 and a turning point in their nests. With this design is the large jaw provides increased angle of coverage of the pipe 18, which is especially important for working with pipes of relatively large diameter (245 mm and above) to reduce damage to the pipe surface.

Figure 2 shows the performance of the machine key to work with several pipes of smaller diameter (for example, for conditional diameters of drill and casing pipes from 95 to 203 mm). Here also, the bearing elements are large jaw and her eyes (respectively, 11, 12, 13) made of high-strength tape, placed in service in one or more layers that are bonded together in a known manner with an arched insert 19 is placed on the outside of the pipe 18 and overlying through plates 8 mounted in self-aligning the other hand 6, located on a support package of high-strength tape 14, is also connected with the arched insert 19.

Figure 3 represents a view along arrow a in the latch 9, depicted in figure 1, 2.

Figure 4 shows the performance of the key for working with tubing, casing and drill pipes (conditional range of pipes 48 to 203 mm). In this case, carry what s the elements of the large jaw made up of multiple series of steel rope or wire 20 (see the cross section of figure 5), laid on the arch box 21, placed on the outside of the pipe 18 and overlying via the supporting element 22 by means of the dies 8, mounted in self-aligning in their nests the other hand 7.

Figure 6 shows the performance of load-bearing elements jaw and her eyes of a multilayer stack of high-strength tape a small thickness.

7 shows a preferred implementation of the lever-arm from heat-treated hot - or cold-rolled plates, interconnected by means of fingers 4 (in section did not get) and 5, as well as swivels 15 traction and safety ropes 16, 17.

The key works as follows. The key is suspended from the wellhead to the long suspension (not shown), is fed to the pipe, held at the Elevator or in Klenova capture.

After snapping it on the pipe 18 with the latch 9 (1, 2, 3) to the lever-arm 3 by means of the traction rope 16 in a known manner (for example, using hydro or pneumonectomies not shown) is applied force, and a gripping jaw 1 (with power elements 11, 20, arched inserts and the support elements 19, 21, 14, 22) are tightened on the pipe 18, providing the necessary clamp to the surface of the toothed plates 8, planted in the other hand 6 and 7 to transmit the required torque. As clear as the x drawings, articulated fingers 4, 5, 10, lugs 12, 13, swivels 15 are necessary elements in the power circuit. When the breakage of the traction rope 16 safety rope 17 protects against injury to the operator.

If in a traditional key, made of cast parts, necessary efforts clamp plates to the pipe is achieved by a specific ratio of the shoulders in the jaws and the lever-handle, key, consisting of high-strength flexible elements are regularities inherent in the tape brakes or belt transmission, in which the tension of the branches of the flexible link have a power dependence on the angle of coverage of a flexible element in the pipe. Because the angle of coverage of pipe links the real key is higher than the traditional, efforts clamp plates and the voltage levels of the key are significantly reduced.

Thus, the advantages of the proposed design are achieved due to the fact that:

the key has a simplified configuration of load-bearing parts, not requiring the use of foundry technology or complex dies,

- in load-bearing parts of the power flows are perceived high strength heat-treated steel strip, for example, of spring-spring steel (can be other material of appropriate strength) or more strings of non-rigid steel rope, enveloping the guide arch insert, giving the desired shape on the hoist, supporting details can only be formed from high-strength tape, bearing on himself the other hand, thus achieving the effect of reducing the weight parameters (strength characteristics of cast steel, traditionally used for the manufacture of parts of the key, and high strength, for example, steel strip spring steel differ by more than 2.5 times)

- eyes of the power units are formed by bending the hinge fingers of the same high strength tape or rope (you may also attach to the ribbon separately performed eyelets known methods of mechanical fastening, welding, etc.),

the other hand together with dice made tilting of the pipe as the flexible tape or rope, and by adding the appropriate configuration of their bearing surfaces.

1. Machine key, including the major and minor jaws, pivotally connected with the lever-arm, which is supplied with swivels for attaching the traction and safety ropes, gripping toothed die on said jaws installed in the other hand, latch, hinge fastened with a large jaw and adapted to interact with a small jaw, characterized in that big jaw made in the form of single or multi - layer (multi-row) package flexible elastic elements, which razmeshena the other hand, this package flexible elastic elements in the form of high-strength tapes or cables with lugs for connection of the jaws by means of the fingers with each other and with latch and lever-arm.

2. Machine key according to claim 1, wherein the other hand made a self-elasticity of the flexible elastic elements.

3. Machine key according to claim 1, characterized in that it is the lever-arm is made of heat-treated hot - or holodnokatny plates, interconnected by means of the fingers.

4. Machine key according to claim 1, characterized in that its large jaw feature arched insert which is bonded a flexible elastic elements.



 

Same patents:

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

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

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 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 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: 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: 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

The invention relates to a device for screwing and unscrewing the casing OCTG pipes in the process tripping when drilling oil and gas wells

The invention relates to a device for screwing and unscrewing the casing OCTG pipes in the process tripping in the development of oil and gas wells casing strings

The invention relates to the field of oil production, namely the means of mechanization tripping associated with pump rods

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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