Wrench with adjustable torque moment for pipe elements at oil deposit

FIELD: oil and gas industry.

SUBSTANCE: wrench with adjustable torque moment for pipe elements includes lower and upper grips, pivot bearing located between grips, actuation system connected between grips and system for measurement of actual radius or system for measurement of actual vector of force created with actuation system. At that, pivot bearing provides the possibility of turning upper and lower grips relative to each other by means of actuation system. Measurement method of torque moment at bringing the wrench into operation involves measurement of actual radius measured perpendicular to force vector and between force vector and rotation axis of pipe element, or measurement of actual force which is applied for action of torque moment on the connection, and calculation of torque moment on the basis of at least one measurement.

EFFECT: increasing operating efficiency of spinning wrench.

12 cl, 6 dwg

 

Scope

The present invention relates to keys with adjustable torque for pipe elements in the oil field, sometimes referred to as power grabs or tails for hard mechanical grip. These devices use when performing manipulations on the screwing or unscrewing of such tube elements drill holes as drill pipe, stabilizers and drill bits.

Prerequisites to the creation of inventions

When performing drilling operations and the descent of the tube elements in the oil field when sbencivu or razvenchivaet connection drill pipe, collars Burov, tubing, or similar items, use different types of keys with adjustable torque. Usually these keys, which are sometimes also called the power grips or tails for hard mechanical entrainment, include upper and lower grips, which consistently capture and release the upper and lower joints of drill pipe, with the upper and lower grippers are moved by way of rotation or movement-type scissors for screwing or unscrewing the threaded connection between the joints of drill pipe. For this purpose use the grips with a mechanical drive.

Some keys with adjustable torque upper grip and lower the second capture rotate relative to each other by means of the cylinder, creates a torque, which can be extended or retracted to the desired screwing or unscrewing drill pipe. System for gripping or engagement pipes on each capture uses moving heads, which include biscuits for grip tube. The head may be movable through various means, including, for example, hydraulic plungers raised to move the heads into engagement with the pipe, ensuring its grasping or clamping.

A brief statement of the substance of the invention

According to the aspect of the present invention is created to be applied to the pipe elements on oil field wrench with adjustable torque, containing the lower grip having a recess for placement of the pipe elements in the oil field along the axis passing through the recess, the upper grip having a recess and mounted on the bottom of the grip so that the deepening of the upper grip is located on deepening the bottom of the grip so that through them will be the axis crackers for gripping pipes located in the recesses of the upper grip and a lower grip and is able to operate between the extended position and retracted position, the rotary bearing located between the upper grip and a lower grip is m and enabling rotation of the upper grip and a lower grip relative to each other, the deepening remain arranged so that through them the axis system actuation, is connected between the upper grip and a lower grip and is able to create a force vector to actuate the upper grip and a lower grip to rotate on the swivel bearing at least a system to measure the actual radius, measured perpendicular to the force vector and between the force vector and the axis or system for measuring the actual force vector generated by the system trigger.

According to another aspect of the present invention created a method of measuring torque applied by the wrench with adjustable torque to the tube elements in the oil field when this key is actuated for the application of torque to the tubular element around the axis of rotation and contains the lower grip having a recess, through which during operation passes the axis of the top grip having a recess and mounted on the bottom of the grip so that the deepening of the upper grip is located on deepening the bottom of the grip so that through them will be the axis of rotation, crackers for gripping pipes located in the recesses of the upper grip and the bottom of the grip, swing bearing located between the top grip and a lower grip and allowing rotation of the upper grip and a lower grip relative to each other, the deepening remain arranged so that through the rotation axis, the system actuation, is connected between the upper grip and a lower grip and is able to create a force vector to actuate the upper grip and a lower grip to rotate on the swivel bearing, the method includes determining at least, the actual radius, measured perpendicular to the force vector and between the force vector and the axis of rotation of the tubular element, or the actual force applied to the impact torque on the connection, and calculating torque based on at least one dimension.

It should be borne in mind that other aspects of the present invention will be obvious to qualified experts in this field from the subsequent detailed description, in which various embodiments of the invention shown and described by illustration. It is clear that the invention allows the implementation of different variants of its implementation, and some of its details allow their modification in various other respects within the scope of the present invention. Accordingly, the drawings and the detailed description should be considered as bearing an illustrative, but not restrictive.

Brief description of drawings

<> In the drawings the same position indicate similar parts, on some aspects of the present invention presented in detail by way of example, and not to impose restrictions on the drawings showing the following:

figures 1A and 1B are views respectively in perspective and in plan from the top of the key with adjustable torque that is installed on the mounting structure;

figures 2A and 2B are views in perspective of the wrench with adjustable torque according to one embodiments of the invention, and figure 2A captures this key is shown in the neutral position, and figure 2B is in the first position of the transfer connection (creation) of torque;

figures 3A and 3B are schematic views of a linear system actuation, which can be used in the present invention, while figure 3A shows the gripper wrench with adjustable torque in the neutral position, and in figure 3B the grips of such a key is shown in the start position for torque transfer.

Detailed description of the various design options

The detailed description following, in conjunction with the accompanying drawings is intended to describe different embodiments of the present invention, but not intended is to represent only those cases which worked out by the inventor. The detailed description includes specific details to ensure a complete understanding of the present invention. However, qualified specialists in this field it is clear that the present invention can be implemented without these specific details.

The present invention, in General, refers to grips wrench with adjustable torque for drill pipes used for screwing or unscrewing the tube elements in the oil field at the same time they include dried for gripping pipes, descent or ascent which must be implemented.

To facilitate understanding of the device keys with adjustable torque, intended for drill pipe, it should be noted that such devices often include a hydraulic or pneumatic power upper and lower grips that are attached can be rotated to perform the movement type of movement of the scissors. Each of the clamps includes crackers, which act to engage or engages the pipe, descent or ascent which must be implemented.

In figures 1A-2B presents one of the options for the implementation of the key 10 with the actuator and adjustable torque, intended for drill pipe and executed according to us is oedema invention. The key 10 is shown associated with the floor 12 of the drilling rig support element, in this embodiment, the structure includes a shoulder 16, which includes passing the side supporting element 18 for the key. The key is associated with the rotational device 20, which is located above the key for rotation of the pipe. Although the invention is described as using power cylinders with hydraulic drive and hydraulic circuit for qualified professionals in this field will be quite obvious and it is clear that any or all of the actuators of this invention, alternatively, may be pneumatic, and together with them can be used conventional pneumatic circuit. As an option, can be used a screw or other actuators.

The key 10 includes an upper gripper 22 and the lower gripper 24, each of which can be virtually identical to another seizure and each of which includes a horizontally positioned housing 26 with the recess 28 at its edges for going down the used oil field pipe elements, descent or ascent which should be implemented, including, for example, joints of drill pipe, drill collars, tubing, casing liners, heads borax and something like that.

When the operation of the upper grip 22 can affect the upper pipe element 30 and the bottom is th grip 24 can affect the lower tubular element 31. To facilitate illustration of tubular parts 30, 31 are shown by imaginary lines of the circuit. When grasping the top of the grip 22 of the upper tubular element and grasping the lower gripping the lower tubular element grips 22 and 24 can be rotated relative to each other, it is often one of the grabs hold stationary, while the other gripper rotate relative to it, so as to screw or Unscrew the threaded connection between the pipe elements. The recess 28 is formed so that the tubular elements 30, 31 are passed through this deepening, in General, along the x-axis and for rotation grabs deepening would be located one above another.

Each grip includes many crumbs 34 for gripping pipes held by the housing 26 in the recess 28. Crackers include mounted on them teeth for gripping pipes. In the present embodiment, design crackers 34 is installed on the head 38, which is movable, for example by 39 hydraulic, pneumatic, screw drives, etc. to the x-axis or from it. So, crackers 34 can be advanced to position engages in the recess 28 or abstracted from the provisions of entrainment. In the present embodiment, design head the crumbs are located in the recess 28, to act is actually diametrically opposed to each other for gripping between them a tube element.

Each cylinder 38 rusk may be located at an angle or curved surface at a distance from each other is installed crackers 34 and so that the breadcrumbs are located along the arcuate path, so that, in General, to follow the outer surface of the capture tube element 30, while the outer surface, of course, also in General is arcuate. The angular location of crackers 34 at a distance from each other allows the introduction engages in spaced apart locations around the circumference of the tube element.

The upper gripper 22 can be rotated relative to the lower gripper 24 to move the grippers from the neutral position shown in figures 1 and 2A, in one of the provisions for the impact of torque with the purpose of screwing tube elements or unscrewing. Starting position for the application of torque with the purpose of screwing tube elements presented in figure 2B. To perform rotary action of exhaust and retractable linear system actuation can be rotated may be connected between the upper grip and a lower grip. In the present Varian is e implementation of the design of the linear system actuation includes a hydraulic unit 96, consisting of a piston double-action cylinder and mounted in the vicinity of the end housings 26 grips, remote from the heads 38 of crackers. Cylinder Assembly 96 is attached by its first end to the lower gripper 24 through a pivot pin 97A and bearing Assembly and its opposite end to the upper gripper 22 through pivot pin 97b and bearing unit. The node 96, consisting of a piston and cylinder, connects with each other the upper and lower clamps 22 and 24 so that by extending and lead generating torque of the node 96, depending on the time of nomination and lead heads with crackers, upper and lower tubular elements 30 and 31 can be captured and subjected to the action of torque for screwing or unscrewing the threaded connection between them.

Extension and abstraction of node 96 will cause the upper and lower clamps 22 and 24 will move to the position of application of torque and from this position, shown in figure 2B, and to the neutral position or through the neutral position shown in figure 2A. That is, in the case when the upper gripper 22 is centered with the lower gripper 24 or when the upper gripper 22 is moved to an angular position relative to the lower gripper 24, which represents a position of application of torque, shown in figure 2 is, the grips 22 and 24 will be moved by rotating, and after seizing the upper tube member and the lower tubular element through the use of crackers pipe elements can be rotated relative to each other.

The upper and lower clamps 22 and 24 can be connected can be rotated by a rotary bearing. In one embodiment, the implementation of the design of the swivel bearing, for example, includes the node 116 of the bearing rings. Node 116 may include a first partial ring 118 and the second partial ring 126, spaced in the outer direction from the recess 28, so that will not interfere with the movement of tube elements through the grips. This presents the embodiment, the design of the first partial ring 118 is attached to the housing 26 of the upper grip, and the second partial ring 126 is attached to the lower gripper 24. Rings 118 and 126 interlocked with each other at their boundary surfaces to create a rotary bearing, on which the upper grip and a lower grip can be rotated relative to each other. The boundary surface between the rings perceived power between the grips and can be rotated Orient the upper and lower clamps 22 and 24 so that they will rotate around the x-axis during the relative rotary movement is tion.

When seizures are properly centered with tubular elements 30, 31, used in the oil field, descent or ascent which must be carried out, the threaded connection between them will be located between the crackers 34 of the upper gripper 22 and crackers 34 of the lower grip, while the tubular elements will be, in General, along the axis X. In this position, the head 38 of crackers lower grip 24 can be actuated to grip between them the lower tubular element 31. Next, depending on whether the screwing of a threaded coupling or uncoupling, the node 96, consisting of a piston and cylinder and serving for the application of torque to bring or take away. During extension or discharge of the cylinder head 38 of the breadcrumbs at the top of the grip 22 will be in their allotted positions so that the upper gripper 22 can be rotated relative to the upper tubular element 30. Therefore, in the case of excepted the top of the grip 22 and is advanced or retracted to the initial position of node 96 depending on whether will be screwing the pipe or unscrewing, the upper gripper 22 can then be given in providing locking engagement with the upper tubular element 30 by extending heads for the location carried n them crackers with the aim of seizing the pipe element. After this happened, the upper pipe element 30 and the lower tubular element 31 can be reliably captured by the respective grippers. The node 96 may be actuated to move the upper and lower clamps 22 and 24 by means of rotation or hinge offset relative to each other, to apply torque to the joints 30 and 31 of the drill pipe clockwise or counterclockwise depending on whether or not to happen screwing on the threaded connection between the tubular elements or unscrewing the connection.

When performing the descent or ascent of the tube elements in the oil field may be desirable determining the torque exerted during the screwing or unscrewing. Although in some situations it may be acceptable rough calculation of the torque, in other situations it may be necessary or desirable to identify the actual supplied torque. The key with adjustable torque of this type, which is described above, the torque exerting under the action of the linear actuator between the upper and lower grips. Torque is calculated as the product of the force vector and a radius that is the distance from the point of application of force to the formed by the axis of rotation. This one is C variants of implementation of the design, if we turn to figures 3A and 3B, the torque applied by the wrench with adjustable torque can be calculated by first defining one or both of the actual radius, measured perpendicular to the force vector, which in the shown embodiment, the design represents the axis F of the linear actuator, and between the axis F of the linear actuator, creating force, and the x-axis, which represents the center of rotation of the tubular element, or the actual force applied to the impact torque in connection with the consideration of dynamic environments, which, for example, in the present case can be constructed by linear the actuator. Such measurements can be performed in one or more selected points in time during operation of the wrench with adjustable torque. In one embodiment, the implementation of the design control system key with adjustable torque/control this key may be repeated to perform measurement on each or both of the actual radius or the actual strength in the course of execution of work so that such measurements could be used to determine the torque. Repeated measurements can be performed in seconds or perhaps a few milliseconds, or more often, if it is continuous from the irenie is of interest. System control/management may accept and process measurement and to control the operation of the wrench with adjustable torque.

In the present embodiment, the design of the linear actuator shown in the form of a cylinder 196 connected to the lower gripper 124 by means of a swivel connection a and connected to the upper grip by means of a swivel connection 197b. To determine the actual radius perpendicular from the force vector, the axis F of the actuator to the x-axis, you should consider the fact that the radius changes as the cylinder performs a working stroke for promotion and assignment. For example, in the present embodiment, the design radius R1 between the axis F of the actuator and the x-axis in the initial position for screwing connection according to figure 3B is smaller than the radius R2 between the axis F of the actuator and the x-axis when the upper grip and a lower grip are in the neutral position shown in figure 3A. To determine the actual radius between the axis F of the actuator and the x-axis can be used by various devices and processes that can include the actual measurement of the radius by examining the position of the center of the wells, and the sensor for determining the position of the force vector. Alternatively, the actual range may be obtained using different parameters key is. The radius between the axis F of the actuator and the x-axis varies the stroke length of the cylinder. In particular, when the rod a cylinder nominate or assign relative to the housing 196b of the piston cylinder, the cylinder is rotated about its hinge locations a, 197b fastening respectively to the upper grip and a lower grip, and this causes movement of the drive axis of the cylinder relative to the axis X. Thus, when the cylinder performs a working stroke, the distance from the axis F of the cylinder to the center of the pipe element, the x-axis, also changes. If it is desirable to determine the actual radius in the course of execution of work it is desirable to perform the measurement of the radius that are in a specific relationship to various or all of the provisions of the stroke of the cylinder 196 wrench with adjustable torque. After this can be controlled by the length of the cylinder, so as to determine the actual radius. The length of stroke of the cylinder can be determined once or continuously during the course of execution of work by using any of various devices 198 to measure stroke length, such as those that provide real-time measurements, for example, through the use of a linear transducer, magnetostrictive sensor, variable reluctance, or a laser device or devices and the intent of the sound wave, designed for the cylinder. As soon as the measurements of the correlation of stroke length and radius configuration/geometry wrench with adjustable torque, they should not be changed during operation. Such measurements can be stored in the automated system for use in measurement of torque. For example, in one embodiment, the implementation of the design can be composed equation relating the stroke length of the actual radius. At any particular time or almost continuously, when the definition of torque is of interest, the actual length of the actuator can be determined and used together with the power to calculate the torque.

The actual force may be determined, for example, through consideration of factoring dynamic parameters during the operation of the impact torque, including, for example, resistance to back pressure, etc. When determining the actual force applied by the linear actuator, together with the cylinder can be used in different system 199 to determine the strength. In one embodiment, the implementation of a design system for determining forces, including at least one pressure sensor, which takes into account one or more of the back pressure and the pressure drop in Hydra the symbolic system, can be used for measuring forces on a continuous basis. In one embodiment, the implementation of the design, for example, can be used in a system that measures the pressure difference on the piston and, consequently, apply force, and it may include, for example, the sensor 200A pressure mounted near the cylinder with communication with the hydraulic line from the rod end to the perception of pressure, and the sensor 200b pressure mounted on the hydraulic lines from the side of the piston cavity. In another embodiment, the design can be applied to a system for measuring the deformation of the cylinder, for example, includes strain gauge s, mounted on a swivel a or 197b, which may, for example, to measure the force based on the deviation. In another embodiment, the design can be used in the pressure transducer of the type torque sensor, which is a cylinder for the job. Force can be continuously measured in real time, or in one or more selected points in time, when it is desirable for operation with the application of torque, and this measurement can be used to calculate the torque.

Calculating torque based on one or Wallpaper the actual radius and the actual force may improve performance by screwing or unscrewing of the connection and can be used when registering the operational data and the control system. Of course, to ensure accuracy can be used for calculating torque based on the actual radius and the actual power at certain times during the operation of the impact torque.

Since the actual torque, in General, is of interest in relation to its size, with the key provided to the connection pipe, which is exposed to torque may be interested in calculating the initial torque required for operation of the key, for example the torque required to actuate the upper grip and a lower grip to rotate relative to each other, for example, by a node 116 of the bearing rings. If the measured friction in the node 116, the requirement of the torque created by the friction can be excluded from the final calculation of torque. Alternatively, or in addition to this, as a bearing ring Assembly, it is desirable to choose a device with low friction in order to reduce the torque required for rotation of the upper gripper relative to the bottom of the grip.

The previous description of the disclosed embodiments of the construction is given for the preparation or use of this izobreteny the qualified specialists in this field. Various modifications of these designs will be understandable qualified specialists in this field, and the basic principles that are defined here can be applied to other variants of the design without deviating from the substance or scope of the invention. Thus, the present invention is not intended to limit the presented here options of design and must comply with the full scope consistent with the claims, reference to an element in the singular, for example, through the use of the definite article "a" or "an"is not "one and only"if it is not specifically listed, and "one or more". All structural and functional equivalents to the elements of the various embodiments of the construction disclosed in the course descriptions, which are known, or later become known qualified specialists in this field, designed for their embracing elements of the claims. In addition, none of the disclosed here is not intended for it to become public, regardless of whether there is an unambiguous statement of such disclosure in the claims. Element of the claims should not be construed under the provisions of 35 U.S.C., 112, sixth paragraph, e is whether the item will not be precisely determined using the phrase "means for" or "step for".

1. Wrench with adjustable torque for pipe elements in the oil field containing the lower grip having a recess for placement of a tube element located along an axis passing through the recess, the upper grip having a recess and mounted on the bottom of the grip so that the deepening of the upper grip is positioned above the recess of the lower grip, and through them passes the axis, designed to grip pipe crackers, located in the recesses of the upper grip and a lower grip, is able to operate in the movement between the extended position and retracted position, the rotary bearing is located between the upper grip and a lower grip, providing the opportunity rotation of the upper grip and a lower grip relative to each other, while the recesses remain positioned so that the through axle system actuation, is connected between the upper grip and a lower grip and is able to create a force vector for the propulsion of the upper grip and a lower grip to rotate on the swivel bearing at least a system to measure the actual radius, measured perpendicular to the force vector and between the force vector and the axis or system for measuring the actual force vector generated systems is th trigger.

2. The key according to claim 1, in which the system actuation contains a linear system and the system to measure the actual radius includes a device for measuring the length of the linear actuator between the upper grip and a lower grip when the action key, the system actuation contains a hydraulic drive system comprising a hydraulic cylinder with a piston, and a system for measuring factors of the actual forces in the pressure of the hydraulic system actuation or actuation contains a hydraulic drive system comprising a hydraulic cylinder with a piston, and a system for measuring factors of the actual forces in the fall pressure hydraulic drive system during operation, or system actuation contains linear drive system comprising a hydraulic cylinder with a piston, and a system for measuring the actual force includes a system for measuring the differential hydraulic pressure on the piston.

3. The key according to claim 1 or 2, in which the system for measuring the actual force includes a strain gauge associated with the system trigger.

4. The key according to claim 1 or 2, containing a system to measure the actual radius and system for measuring vector actually th power.

5. A method of measuring torque applied by the wrench with adjustable torque to the tube elements in the oil field when the actuation of the key for the effects of torque on the tubular element around the rotation axis, when this key contains the lower grip having a recess, through which in operation passes the axis of rotation, the upper grip having a recess and mounted on the bottom of the grip so that the deepening of the upper grip is located on deepening the bottom of the grip so that through them will be the axis of rotation, crackers for gripping pipes located in the recesses of the upper grip and a lower grip, the rotary bearing is located between the upper grip and a lower grip and allowing rotation of the upper grip and a lower grip relative to each other, and the recesses remain positioned so that through the rotation axis, the system actuation, is connected between the upper grip and a lower grip and is able to create a force vector for the propulsion of the upper grip and a lower grip to rotate on the swivel bearing, the method includes performing at least measure the actual radius, measured perpendicular to the force vector and between ve the Thor force and the axis of rotation of the tube element, or measure the actual force applied to the impact torque on the connection, and calculating torque based on at least one dimension.

6. The method according to claim 5, in which perform the actual measurement of the radius by obtaining data that establishes the relationship of the length of the linear actuator with measurements of radius, perform the measurement of the actual length of the linear actuator during the action of the wrench with adjustable torque, use the actual length of the linear actuator for extrapolation measure the actual radius, based on the data in this stage of the calculation the supplied torque based on the measurement of the radius.

7. The method according to claim 5 or 6, in which the system actuation contains a hydraulic drive system comprising a hydraulic cylinder with a piston, and exercise stage of measurement factors the actual strength in the back-pressure hydraulic drive system, or system actuation contains a hydraulic drive system comprising a hydraulic cylinder with a piston, and exercise stage of measurement factors the actual forces in the pressure drop of the hydraulic drive system in the course of execution of work, or system actuation contains a linear drive system, including the impact of the hydraulic cylinder with the piston, and stage measure the actual force includes measuring the difference of hydraulic pressure on the piston.

8. The method according to claim 5 or 6, in which the stage of measuring the actual force manages strain gauge associated with the system trigger.

9. The method according to claim 5 or 6, containing the actual radius and the actual torque.

10. The method according to claim 5 or 6, which further comprises determining the desired torque created by the friction of the swivel bearing and the exclusion of the desired torque created by the friction of the calculated torque.

11. The method according to claim 5 or 6, which further comprises a control key with adjustable torque based on the calculated torque.

12. A method of measuring torque applied by the wrench with adjustable torque to the tube elements in the oil field, with upper and lower hinge zone, the method includes the following stages: linking the upper and lower hinge zones around the anchor zone, located between them in such a way that the upper and lower hinge zone are rotated relative to each other, while the exciting part in each hinge zone surrounds the axis of rotation of the tubular element passing through it, and so sposoben for connection with the tubular element; create a vector force to actuate the upper and lower hinge zones for the implementation of the rotation around the anchor zone; performing at least measure the actual radius, measured perpendicular to the force vector and between the force vector and the axis of rotation of the tubular element, or measure the actual force applied to the impact torque on the connection, and calculating torque based on at least one dimension.
Priority items: 24.08.2006 according to claims 1-12.



 

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9 dwg

FIELD: oil-gas industry.

SUBSTANCE: invention relates to the oil production and can be used in round-trip at wells in remedial maintenance, to apply the torsional moment to pipes. The wrench for screwing and breaking out pipes contains the interconnected swivel joints (4, 5, 6), jaws (1, 2, 3) first of which (1) is connected to the handle (7) via the swivel joint (6), and the jaw closing block with one unit (9) installed at the handles (7) and another one is placed at the last jaw (3). The wrench is provided with the block controlling at least one distance L between swivel joints 4 and 5 or between swivel joints 4, 6 and the contact unit of the closing block.

EFFECT: structural design of wrench for screwing and breaking out pipes is simplified, while reliable closing of jaws, if their size deviates from the rate, is provided.

2 cl, 3 dwg

FIELD: drilling equipment, particularly drilling devices for round-trip operation mechanization during assembling or disassembling of drilling strings, casing pipes and flow strings.

SUBSTANCE: automatic pipe wrench comprises upper and lower pipe clamping devices, intermediate reducer, transmission gear 4, drive motor 5 and manometer 6. Transmission gear 4 includes differential reduction means 10 and speed selector coaxially installed inside cylindrical body. Speed selector includes toothed high-speed 11 and low-speed 12 half-couplings linked to high speed 13 and low speed shafts of differential reduction means 10 correspondingly. Sliding toothed half-coupling 14 cooperates with high-speed 11 and low-speed 12 half-couplings. Speed selector also has power cylinder 15 with spring-loaded piston 16. The power cylinder 15 is coaxial to toothed half-coupling 14 and cooperates therewith.

EFFECT: simplified structure, increased wrench capacity and manometer operation accuracy, decreased weight and size.

4 cl, 3 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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