Top drive and method of pipe holder

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

 

The present invention relates to a device top drive, the way you grip the pipe and method facilitate the removal of items from the drive shaft of the top drive.

In drilling a well bore in the construction of oil or gas wells, or geothermal wells, or wells with fresh water and similar drill bit mounted on the end of the drill string that is rotated to drill the borehole through the formation.

A top drive for drilling boreholes such as oil and gas wells, is one of two common types of devices for drilling boreholes, the other of which is the rotor. Drilling rig having a rotor, in General, contains supporting structure of the tower with the crown block at the top. Traveling block movably suspended from the crown block by means of a rope, supplied drilling rig winch. The hook or the adapter unit can be hung on the traveling block on stroph. Leading drill pipe is suspended from the hook on the traveling block. The lower end of the leading drill pipe is attached to the drill string. The lower end of the drill string has the layout of the bottom of the drill string carrying a drill bit. Drill string and drill bit are located in the barrel of drilling the well and go down from the surface. Leading drill pipe is rotated in the borehole the rotor.

The top drive device, in General, contains the main body, which houses the motor for rotating the drive shaft with the sub connected to a single pipe, a candle or column pipe. Pipes can be any of the following: drill pipe, casing pipe, pipe liner, pipe high quality or any other pipe used in the construction, operation, and repair of all wells, such as oil and gas wells. The top drive device, in General, installed, essentially, a vertical monorail on the derrick of the drilling rig. A top drive is raised and lowered by the hoist rope passing through the crown block on the traveling block connected to the top drive device through a hook or adapter unit which can be attached to a traveling block on stroph. The rope wound on the drum and is etched using a winch, commonly known as drawworks. The top drive device, therefore, can be used for flights pipe in the wellbore and out, rotating the drill string to facilitate the drilling of a well bore and rotation of single tubes or candles pipe relative to the pipe string suspended in the well bore for threaded connection or disconnection of the pipes from the pipe columns for lengthening the sludge is shortening the pipe string. Top drive adapter has a lever, which is suspended from a pair of the lever. The Elevator is suspended on strobach attached to the upper actuator to facilitate manipulation of the pipe tool and match the sub to connect to it and detach from it. The top drive device can also be used in conjunction with passive or active and/or rotary pipe wrenches to facilitate connection or disconnection of the pipe tool from the column pipe tool.

An important factor is the ability to control pressure in the wellbore relative to the pressure in the reservoir. In some conditions, the driller may consider necessary underbalanced drilling, the pressure exerted on the reservoir into the wellbore below the internal pressure of the reservoir fluid. Thus, if there is sufficient porosity and permeability, formation fluids enter the wellbore. Drilling speed usually increases with approach to the conditions of the depression. However, the driller may deem necessary drilling on repression, in which the pressure in the well bore exceeds the pressure of fluid in the reservoir. This excess pressure is required to prevent fluid reservoir (oil, gas or water) in the wellbore. However, excessive repression m which may seriously slow down the process of drilling an effective hardening rocks in the stalk zone wells and limiting removal of drilling cuttings under the bit. In addition, the high pressure repression combined with bad qualities of the mud can cause problems sticking under the action of pressure difference. As pressure reservoirs vary from one reservoir to another, while the drilling fluid has a relatively constant density, repression varies from one zone to another. The driller can change drilling conditions from depression to repression by changing the density of the drilling fluid by the application of weights to increase or decrease the density of the mud.

If the well pressure is not managed appropriately, the drilling rate is not maximized. In the worst case, the borehole may collapse due to lack of pressure in the wellbore. This case is more likely when drilling through special types of layers.

In the past, the circulation of the drilling fluid was stopped during fastening or unfastening a single link or candles drill pipe. The inlet valve or the check valve under the leading drill pipe is used to maintain pressure in the drill string during fastening or unfastening. However, the valve should be attached and detached. Thus, there is intermittent circulation, although the pressure in the well, essentially, supported a noticeable boost the pressure changes.

Often is the preferred maintenance of drilling cuttings in suspension in the drilling fluid to facilitate moving it from the drill bit and prevent it from falling back into the wellbore. The termination of circulation of the drilling fluid may cause the precipitation of the drilled rock. To combat this, many known systems have been made more of the heavier fluid, often increasing the viscosity of the fluid. As a result, there is a need for greater power injection on the surface to move more dense fluid medium; but this increase efforts injection can lead to the creation of excess pressure at the well bottom, which can cause formation damage and loss of fluid at the bottom.

The system of continuous circulation, developed and disclosed in the publication WO 98/16716, provides for the circulation of drilling mud during the fastening and unfastening of the pipe with a column of tubes. This publication discloses, inter alia, the use of the upper set of pipe dies for contact and seal around the pipe, to be connected with the column, the lower set of pipe dies for contact and seal around the pipe on the upper part of the column in the well to create a chamber between it and a blank plate for isolation of camera IU the remote end pipe nipple, subject to connection and coupling pipe on the upper part of the column for the education of the upper and lower chambers. The inlet of the mud is in the lower chamber between the set of the deaf dice and the second set of pipe dies. The flow of the drilling fluid is also connected with the upper end of the pipe, subject to accession, thus, to complete the connection of the lower pipe dies are included in the operation and compacted around the upper end of the tubing in the wellbore, and deaf dice are included in the work for the formation of the bottom of the camera around the top of the drill string. Drilling mud enable passage in the lower chamber and the circulation in the upper part of the drill string. The drilling fluid passes through the drill string to the drilling bit and returns through the annular space formed by the drillstring and the wellbore. The drilling fluid is processed on the shale shakers, centrifuges and the like for removal of drilling cuttings, if necessary, additives are added, and then the circulation in the lower chamber. At this time, the pipe or pipe candle down into the upper part of the system of continuous circulation. The upper pipe dies are included in the work to seal over the pipe. The upper end of the pipe or tube candle is attached to the inlet drilling rest the RA, and the drilling fluid passes into the upper chamber when the operation of the valve. The pressure of the drilling fluid at the moment, essentially the same in the upper and lower chambers. Opens a blank die and the nipple end of the pipe or tube candle is put in the clutch the upper end of the column pipe and screwed and decrased to perform the join. Drilling mud from the camera can be reset and open the upper and lower tube plates to allow descent of the pipe columns with added pipe or tube candle in the hole. Thus, the circulation is continuous through the column pipe and the annular space when connections are made and sever.

Made various improvements to the system for continuous circulation, which includes conducting continuous circulation during drilling, thus ensuring the continuation of the continuous drilling, while the pipe is connected or disconnected from the column. It is suitable for drilling with drill pipe or casing pipe.

Elevators use of such works for the election of carrying pipes and facilitate the movement of tube elements from one place to another.

The prior art discloses various devices capture pipe tool, top drives, usage is used with such systems. Some of the known device top drive have a power top drive and the gripping system of pipes to accommodate pipes and pin clamps for contact and grip the pipe installed in the system capture. In one aspect, each clip has an attached device with hydraulic cylinder, managed and involved in the work to move the clamp into engagement with the pipe and deducing from it. Internal blowout preventer can be used to protect against pressure rise in the pipe, such as drill pipe or casing pipe, when performing drilling operations. Internal blowout preventer can be placed under the top drive, connecting thread with the drive shaft of the top drive.

The patents of the prior art discloses a wide variety of such systems, including, without limitation this only as an example, the system disclosed in U.S. patent No. 7055594 and in the references cited in this patent, and systems disclosed in U.S. patent№№ 2950639; 3902385; 4346629; 4458768; 5433279; 6276450; 4813493; 6705405; 4800968; 4878546; 4,753,300; 6536520; 6679333.

U.S. patent 7,055,594 discloses a device of the grip tube and the top drive device, and, in some aspects, a system for drilling with a top drive, at least in some aspects with the block top drive, the gripping system of pipes under nl is com top drive, having an open mouth for placement of pipes subject to capture by the capture system pipes, and at least in some aspects, the gripping system having a body with first and second clamps movably connected to him the power cylinder, movably attached to each clamp to move the clamp and then to rotate the pipe. In one aspect, the disclosed systems capture of a pipe body, a first clamp movably coupled to the housing, the second clamp movably coupled to the housing, the first power cylinder, movably attached to the first clamp, the second power cylinder, movably connected to a second clamp, the first power cylinder to move the first clamp to secure the pipe and the second power cylinder to move the second clamp to secure the pipe, while the first and second power cylinders rotate the pipe.

U.S. patent 7281451 discloses methods and apparatus for fastening and unfastening of the pipe joints in the pipe string. In some aspects, the layout of the pipe wrench includes an adjustable mechanical pipe and holding pipe wrenches, United with a barbell torque. Clamps, pipe wrenches can be placed around the perimeter of the support elements located between adjacent terminals, essentially on a full circle of 360 g is adosow. The hydraulic system can evenly distribute the hydraulic fluid and pressure to bring the clamps into action. Mechanical pipe wrench may include adjustable rotor driven at least three engines. The rotor can be selectively physically to stop the rotation or movement of one or more tabs of the rotor. Additionally, the layout of the pipe wrench may include a lock that prevents the inclusion of the work drive motor until the latches of the rotor will not be powered to unlock the rotor. In addition, trailing clamps can attach pipe wrenches and the rotor, when closed, and breaking the coupling device can help the connection of the engine with a rotary pump. Disclosed is a device for manipulation of the first pipe and the second pipe during operation of fastening and unfastening, including: pipe wrench with clamps, radially arranged in the rotating element and move to the center to capture the first pipe, with each clip is driven essentially the same flow rate of the fluid, independently adjustable total pressure limiter, and the retaining element to capture the second pipe and prevent its rotation.

U.S. patent No. 3902385 reveals the bonding tool and rusk is alinia pipe locks for fastening and unfastening the threaded tubular locks, includes two layout capture made with the possibility of coverage and capture of two pipe sections, respectively, each having two clamp pivotally connected together for movement into open and closed positions, with two layouts grip mounted for rotation about the axis of the pipe by means of the actuators with the actuator preferably includes two devices with the power cylinders, each of which operates in one direction of rotation against the direction of rotation of the other layout capture essentially on the location of the hinge between its two terminals. In one aspect of the disclosed tool for performing rotation of the two tubes with screw locks around the axis of the pipe, one relative to another, comprising: a first layout of a capture made with the possibility of extension to the coverage of the first pipe and its capture and includes two clamps and the first swivel fastening clamps together for relative swinging movement about the axis of the first hinge between an open and a closed position, the second layout of the grip, made with the possibility of extension to the coverage of the second pipe and its capture, and includes two additional clamp and the second swivel fastening clamps together for relative swinging plumage is of edenia around the axis of the second hinge between an open and a closed position; power actuating unit for the application of force to two related pages, causing rotation of the tubes relative to each other; two swivel, placed essentially combining one axis relative to another position with the possibility of opening clamps both layouts capture; and emphasis, supported by clamping one layout capture and concatenate with emphasis on the appropriate terminal on the other layout capture the relative transmission of force closing from one clip to another clip, when the two layouts are in the position of the opening relative to each other.

According to the present invention the device created by the top drive with the top drive and an exciting device that is connected to a top drive located under him and having a body and a mouth for the reception of a pipe, is subject to seizure, and four gripper to engage the pipe, you want to capture.

Preferably, two of the four grippers are arranged at obtuse angles around the neckline. Preferably, the other two of the four grippers are arranged at obtuse angles around the neckline. Most preferably, two of the four grippers located at obtuse angles around the neck, located in the first part of the body, and the other two of the four grippers located at an obtuse at the Lamy around the neckline, located in the second part of the housing, and the first portion is selectively moved from the second part. Preferably, the first portion is separable from the other parts. Preferably, the part is half of the housing. Preferably, the first part is pivoted relative to the second part. In some aspects, the body is a one piece, in other aspects of the case consists of two separable halves.

Preferably, at least one of the gripper movably connected to the housing. Preferably, the piston cylinder is used to move at least one of the grippers. Preferably, the piston and cylinder have a double action, so using it is possible to move at least one of the clamps to the pipe and from it. Preferably, the grippers mounted on arms attached to the housing can be rotated.

Preferably, the gripper is suspended from the top drive, the at least one pipe with high resistance torque, preferably, at least two pipes with high resistance torque. The pipe may have a rectangular cross-section. Preferably, at least one pipe with high resistance torque is readign the th to provide moving a gripping device to the upper actuator and from him. Preferably, the pipe with high resistance torque is telescopic. Preferably, the pipe with high resistance torque contains the external top and inner bottom, sliding in the outer upper part. Preferably, the piston and cylinder are used for expanding tubes with high resistance torque.

Preferably, the housing further comprises a slotted element, slotted element for mating with a corresponding splined element on another part. Preferably, the other part is internal to the blowout preventer.

Preferably, the top drive device further comprises a lifting device for lifting a gripping device so that the grooved element engages with a corresponding splined element on the other part for selective engagement. Preferably, the neck is round and slotted element passes through the perimeter of the neck. Preferably, the housing includes two halves, slotted element is located on one half. Preferably, the capture device holds the pipe part of the tool suspended on the inside the blowout preventer, and a drive shaft of the top drive rotates to disconnect the internal promuovi rasovogo preventer from the drive shaft. The first half of the housing is moved from the second half to move the internal blowout preventer from the gripping device. Preferably, the top drive includes a drive shaft and an internal blowout preventer connected to the drive shaft. Internal blowout preventer is connected directly or indirectly through a sub or something. Preferably, the internal blowout preventer has a main section and a tube section which is hooked on it, while the main site is located between the top drive and casing gripping device.

Preferably, the grippers are moved simultaneously to grip the pipe in the mouth of a gripping device. In one aspect, each gripper has an attached device with hydraulic cylinder selectively controlled and included in the work to move the gripper in an exciting engagement with the pipe and the pipe or to move it from gripping engagement with the pipe.

The present invention also created a way of capturing the pipes under the top drive with the movement of the pipe element in gripping device located below the upper actuator and having a body having an orifice for placing of the pipe, is subject to seizure, and four clamps C is Ceplene pipe, you want to capture, and the grippers movably connected to the housing and the grip pipe four grippers exciting system.

Preferably, the housing has two parts, and the method includes moving at least one of the parts to open the neckline. Preferably, the upper actuator has a drive shaft and an internal blowout preventer connected to the drive shaft. Preferably, the housing has a first spline element and the internal blowout preventer has a second slotted element, and the method includes coupling the first spline element with the second spline element. Preferably, the gripper is located on a lifting device for lifting specified device, gripping the pipe relative to the second spline element for engagement of the first spline element to facilitate breaking of the connection between the internal blowout-preventer and drive shaft, and the method further comprises lifting a gripping device to engage the primary spline element secondary spline member and breaking the connection between the internal blowout-preventer and drive shaft.

Preferably, the gripper is designed to maintain the internal blowout preventer, disconnected the t of the driving shaft, and the first part that is moved from the second part, for opening the cap for removal of the internal blowout preventer from the capture system, and the method further comprises moving the first part from the second part, the first part supports the internal blowout preventer, and the movement of internal blowout preventer from the first part.

The present invention also created a top drive, a top drive having a drive shaft, the part that engages with the drive shaft, and the casing is suspended from the top drive, wherein the frame includes a first slotted item, and the item has a second slotted element for engagement with the first sliceby element for selective spin-down parts to facilitate its separation from the drive shaft of the top drive.

Preferably, the housing is an exciting device for selective capture of pipes. Preferably, the item is internal to the blowout preventer. Preferably, the first spline element contains the slots located on the concave surface. Preferably, the concave surface is a section of a circle, preferably passing through the circumference of between 90 and 270 degrees and, preferably, essentially 180 degrees or illegal is acetelyne greater than 180 degrees, so if the item based on the first spline element, he supported the item, and the loss of detail from it is less likely.

Preferably, the second spline element contains the slots located on the convex surface. Preferably, the convex surface is a complete circle that goes around the perimeter of the part. Preferably, the second slotted element fixedly mounted relative to the parts, and the screw connection. Preferably, the first splined surface is located on the edge of the jutting up out of the case.

Preferably, the housing includes a nozzle for placement of the pipe, the first splined surface is located adjacent to the neck. Preferably, the casing is made of two parts, the first spline element is located at least on one of the parts, the parts are premeschenie to open the cap to facilitate removal of the cap part. Preferably, the housing is moved to the upper actuator and from him for selective connection of the first spline element with the second spline element and detach from it.

Preferably, the first and second slotted element contain slots located essentially vertically, preferably, so that the splines are engaged, when the housing is moved vertically to the top of the actuator to engage the first spline element with the second spline element.

The present invention also created a method for facilitating the removal of the details connected with the drive shaft of the top drive with the engagement of the first spline element body, suspended from the top drive, the second spline element part, and the rotation of the drive shaft of the top drive to detach items from the drive shaft. In General, provided by the threaded connection between the drive shaft and the item.

Preferably, the method further comprises a bearing part on the spline element. Preferably, the method further comprises the bearing parts on the body. Preferably, the method further comprises attaching the auxiliary winch rope to detail and remove items from a position of alignment with the top drive.

For a better understanding of the present invention as described below with reference to the accompanying drawings, which depict the following:

in Fig. 1 shows an isometric view of part of the drilling rig with top drive device containing the gripper according to the present invention;

in Fig. 2A shows an isometric view of the device of the top drive with the exciting device according to the present invention;

in Fig. 2B shows a side view of the top drive device shown in Fig. 2 is;

in Fig. 3A shows a side view of part of the drilling rig according to the present invention;

in Fig. 3B shows a top view of the drilling rig shown in Fig. 3A;

in Fig. 4 shows an enlarged front view of the device of the upper actuator shown in Fig. 2A;

in Fig. 5A shows a side view of the device of the top drive with the exciting device according to the present invention;

in Fig. 5B shows an isometric view of the device of the upper actuator shown in Fig. 5A;

in Fig. 5C shows an isometric view of the device of the upper actuator shown in Fig. 5A;

in Fig. 5D shows an enlarged isometric view of the device of the upper actuator shown in Fig. 5A;

in Fig. 5E shows a top view of the device of the upper actuator shown in Fig. 5A;

in Fig. 5F shows an isometric view of the device of the upper actuator shown in Fig. 5A;

in Fig. 5G shows a top view cross-section of the device at the top of the actuator shown in Fig. 5A;

in Fig. 5H shows an isometric view with removed top part of the top drive device shown in Fig. 5A; and

in Fig. 6 shows a front view of a gripping device according to the present invention.

In Fig. 1 shows a device 10 ve is knego drive, according to the present invention, which includes a drill Assembly 20 with the top drive is suspended on the tower 12. A possible system 30 continuous circulation relies on the rig floor 14, and a part of the safety sub 22 protrudes upward from the system 30. The safety sub 22 is connected to the drill Assembly 20 top drive and rotates them. The Elevator 40 is suspended under the drill Assembly 20 top drive. An exciting device 50 according to the present invention (shown schematically) is suspended from the drilling unit 20, and the Elevator 40 is suspended from the device 50. Any suitable known Elevator can be used with the device 50 for gripping pipes. The device 50 (any, according to the present invention) is suspended on the drill Assembly 20 on strobach 18 and the Elevator 40 is suspended from the device 50 on strobach 24.

The system according to the present invention can use the lines of the hydraulic drive for an existing top drive and/or other existing devices rig (for example, but without limitation this pipe manipulator), driller's console, buttons, computer and management tools can be used to control a gripping device according to the present invention. Alternatively, you can use a completely separate hydraulic power pack is Alenia and/or management tool, which, in one aspect, the remote system RS.

The gripper according to the present invention can be used with the systems disclosed in application U.S. No. 11/140462 filed 28.05.2005, No. 10/870,700, filed 16.06.2004, No. 10/877949 filed 24.06.2004, No. 10/872337 filed 18.06.2004, and No. 10/862787 filed 7.06.2004, fully incorporated in the present description for all purposes and are available in the publication file no WO 2005/121493, also fully incorporated herein for all purposes.

In Fig. 2A - 2B shows a top drive device according to the present invention, having a housing 112 swivel hanging on strobach 113 on the bracket 116. The bracket 116 is connected to traveling block (not shown). Gear 120 mounted on the dividing plate 121, based on the housing 112 of the swivel. The motor 130 is connected with a gear 120, it is possible to use any suitable engine. Brake system 140 connected to the motor 130 is in the cover 144, through which passes a gander 146 connected to the hose (KH) swivel (adjacent to the service loop (SL)through which the drilling fluid. System 198 extension creates a horizontal displacement device top drive.

The motor 130 has an output shaft driving the master spindle of the drilling rig through the motor 130, the gear is eradico 120, the dividing plate 121, the housing 112 swivel, locking system 160 and truck clutch 170. The lower end 158 of the spindle is connected by thread with system 90 protivovospalitel mud connected with safety sub 92. System 100 according to the present invention for selective capture of a pipe suspended from the cargo coupling 170. Stropy 172 hung Elevator 174 to the adapter 189 the lever.

The system 110 of the counterweight (which can hold the weight of the entire system during planting pipe into the coupler includes two compensator 114 loads, each with an upper end connected to the lever 113, and the lower end connected to the housing 112 of the swivel. Each compensator 114 includes the layout of the piston/cylinder. System 129 deviations of the lever creates a selective deflection of the lever 172 and, thus, the selective movement and deflection of the Elevator 174 and moving the tube or pipe candles resting on the Elevator 174 to the axis of the wellbore and from it. The tabs 94 stropu fixed stropy 172 on the adapter 189 the lever 189. Deflecting stropy hydraulic cylinders 128 swivel attached between the load sleeve 170 (connected with eyelets a) and levers 128b. Each coupling 124 swivel connected with the lower end of the lever 128b and clamp 126 fastened to lever 172. If necessary, the roller fingers 127 passes is drawn through the clamp 126 to facilitate the movement of stropu 172 in the clamps 126.

Protective fencing 173 and 174 are laterally service site 199. Service area 199 is connected with the possibility of disconnection with rear protection at the top and turning on the lower section of the fencing so that it can be rotated and lowered, creating a platform on which may be placed staff to access various components on the rear of the protective fence. If necessary, the service platform may have a plot with a recess to facilitate the posting of pipe tools and facilitate the movement of pipe outside the service area.

The device TDS top drive can be adjustably set on the beam 182 (or "pipe with a high resistance to torsion"). Horizontal offset provides extension system 198 includes liner torque transmission. Extension system 198 together with the top drive device attached thereto, is moved vertically on the beam 182. Each hour 285 is a telescopic stand with the outside 285o and the inner part 285i.

In Fig. 3A and 3B shows a portion of the drilling rig that contains the device TS top drive according to the present invention on the tower D. the Device TS top drive is suspended on hoisting block BB, suspended by a derrick D in the usual way. As shown in the IG. 3A, the Elevator 174 carries a tubular candle TT, which includes two drill pipe 143. Candle TT moved from a raised platform with multiple bonded candles 149 in position of alignment with the axis of the shaft 147 wells. The lower end 144 to doctrove can be used, for example, to bond the candles. The driller controls the drilling console 141 driller.

In Fig. 4 shows a system 100 for selectively fastening pipe tool, such as drill pipe or casing pipe. The system 100 can be an integrated device, or to have two halves, hinged together. The upper ends of the outer part of the frame, 285 system 100 is connected with the connecting structures of the coupling 194 fingers a and fingers 285b - with connection structures of the cargo clutch 170 and the lower ends of the inner parts 285i rack is bolted to the system 100. The inner part 285i rack is moved in the outer parts of 285o racks for telescopic steps to ensure that the movement of the system 100 up and down.

In one aspect, the system 100 has a dual opposite halves connected together by removable fingers so that the system 100 can be opened. Also both halves can be rastrapati, allowing the movement stands for undocking, providing access to details of the uprights and to other system components. In some of the which aspects of the two halves are identical, facilitating replacement and minimizing the number of required spare parts and equipment.

In Fig. 5A - 5H illustrates the device 500 top drive according to the present invention with a gripping device 600 according to the present invention. The adapter 502 the lever under the system 504 engine/gear connected with cargo coupler 512 and has stropy 506, bearing the Elevator 510. Telescopic rack 516 is connected to the device 600.

The device 500 top drive includes an upper internal blowout preventer 522. Plug slotted element 524 slotted a on the upper internal blowout-preventer 522 can be connected with the splined sleeve 604 slotted a, between which are placed slots a. The device 600 can be raised up on the counters 516 so that the splined sleeve 604 engaged with the detachable slotted element 524 for use in detaching the connection between the drive shaft 528 devices top drive and the upper internal blowout-preventer 522. After unscrewing the upper internal blowout preventer 522 of the device 600, which includes a slotted sleeve 604, supports the upper internal blowout preventer 522. Splined sleeve 604 is located on one side 612 of the device 600, as described below, this half 612 may Donatist out the underside of the device top drive, to products supported by the device 600, such as the entire block valves or, for example, shows the upper internal blowout preventer 522 can be lifted and removed, for example, by using the auxiliary winch rope.

The device 600 has two halves 612, 614, swivel attached to the supports 518 racks 516 many fingers 519. Central fingers 521 also attach half 612, 614 to the supports 518 racks. Remove finger 519 allows half of 612 or 614 device 600 grip to rotate around the remaining fingers 519 (when appropriate remote Central fingers 521). When all remote fingers, you can remove half of 612, 614. As shown in Fig. 5D, the finger 519, holding one end of the half 612, removed, as well as the Central fingers 521 to half 612 could turn around the remaining fingers 519, while it carries the upper internal blowout preventer 522, disconnected from the shaft 528 (with sleeve 604, which is connected with the detachable slotted element 524 and the bearing of the upper internal blowout preventer 522).

Rack 516 are telescopic racks, creating an adjustable length. The lower part 516b racks are moved in the upper parts of a racks in and out of them (see, for example, Fig. 5A, 5C) (although the scope of the present invention provides for the use and continuous atelescope the standard stand).

Half of the guide cone 533 and 535 facilitate centering of the pipe tool. Guide cone 533, 535 also facilitates alignment of the capture device around the pipe tool to be attached to a drive shaft 528.

In Fig. 5G shows a portion of the internal layout of the gripping device 600. Each half 612, 614 has two casing 641, 642 (half 612) and 643, 644 (half 614). Capture 650 is placed movably in each of the casings 641-644.

Each capture 650 includes a movable piston 652 with holder 654 dice attached thereto by bolts 656. Seal 662 seals the junction of the housing/piston, and the seal 664 seals the junction of the mount/piston between 668 mount and the piston 652. Each holder 654 dice is a dice 672 mounted thereon. Each casing 641-644 has openings for the fluid PF and PO for supplying fluid under pressure to move the piston 652 to move the dice 672 engages the TB pipe and out to capture the device 600. Pistons 652 is moved on the rod 678.

As shown in Fig. 5G, each piston 652 is moved so that its corresponding plate 672 is engaged with the pipe TB, holding the TB pipe in the center of the gripping device 600. With acceptable system CS control fluid under pressure from the source FS fluid (e.g. hydraulic W is dcost or working gas of the pneumatic system acts on the pistons 652. This can be done so that the piston 652 moved simultaneously, in unison, or not.

In Fig. 5H shows an alternative structure of the device 600 to move four grippers in engagement with the pipe. Four capture 700 is installed on the casing 702. The housing 702 has openings 704 to accommodate the lower sections of bearing struts (similar racks 516).

Each capture 700 has a housing 712 to the first end 714, a swivel mounted on the finger 716, the second end 718 and hole 722, through which passes the rod 724. Each rod 724 has a holder 726 die (die 728)attached to it.

The lever 732 runs from each holder 726 die. Each lever 732 has an end, a swivel mounted on the casing 702 rotary finger 734. Each rod 724 is connected with the inner piston P (one piston is shown in dashed lines). The movement of the piston P moves the rod 724 to move the holders 726 die to the pipe in the center of the device 700 grip tube and from it. When moving rod 724 each arm 732 is rotated around the respective rotary stopper 734, and each casing 712 grip is rotated about its respective finger 716. Fluid under pressure to move the piston P is fed along the lines 738, 739.

In Fig. 6 shows a system 800 according to the present invention, which includes exciting is the system 802 according to the present invention (any disclosed herein, for example, system 100). Rack 804 connect system 802 device 810. When rotating the device 810 rotates the system 802 and the pipe, which is fastened system 802. Rack 804 shown not telescopic but telescopic masts can be used.

Rack 516 in some aspects are relatively more massive than rack similar to the rack 285 (Fig. 2). In some aspects, the rack 516 have a larger cross-section than the racks, similar relatively flat racks 285, and/or are longer than the rack similar to the rack 285, and made more massive in order to better counteract the torque acting on the gripping system, based on the rack.

The present invention thus created in some but not necessarily all, embodiments of the exercise device top drive unit with a top drive system, exciting the pipe connected to the top drive unit and below it.

The present invention thus created in some but not necessarily all, embodiments of the exercise device top drive unit with a top drive system, exciting the pipe connected to the top drive unit and under him and having a housing, four gripper movably connected to the housing, four device is and with the power cylinders, one movably attached to each of the grippers, and the device with the power cylinders are used to move the grippers to secure pipe tool, such as drill pipe.

The present invention thus created in some but not necessarily all, embodiments of the implementation of the system, exciting the pipe connected to the top drive unit, and having a housing, four gripper movably connected to the housing, four devices with the power cylinders, one movably attached to each of the grips, with the device with the power cylinders are designed to selectively move the clamps to secure the pipe, such as drill pipe. In this exciting system, the grippers can be moved in unison and at the same time.

According to the present invention there are four capture, evenly spaced around the opening or neck of the placement of the pipe (e.g., ninety degrees). In another aspect, the volume of the present invention includes two adjacent hooks on opposite halves of the capture system, arranged at an acute angle (see seizures And, B, in Fig. 5G), and two grip on one half, arranged at an obtuse angle (see seizures And C, Fig. 5G). With the arrangement shown in Fig. 5G, the size DD can be reduced, and relatively less space may be occupied by the capture system according to the present invention, in some aspects facilitates the installation of such a system between the bearing streami.

The present invention thus created in some but not necessarily all, embodiments implement the methods of capture tube under the top drive unit, which includes the moving parts of the pipe system, exciting the pipe below the top drive unit.

The present invention thus created in some but not necessarily all, embodiments of the exercise device top drive system, exciting the pipe connected to the top drive device, and having a housing in which is housed a pipe, you want to capture, and four of the grip to lock the tube, movably connected to the housing. The present invention thus created in some but not necessarily all, embodiments of the exercise device top drive system, exciting the pipe connected to the top drive device, and having a housing, a first gripper movably coupled to the housing, the second gripper movably coupled to the housing, the third gripper movably coupled to the housing, the fourth gripper movably connected to pusam, the first power cylinder, movably connected with the first grip, a second power cylinder, movably connected with the second capture, the third power cylinder, movably connected with the third seizure, the fourth power cylinder, movably connected with the fourth capture, each power cylinder designed to move its corresponding capture for fixing pipes. Such a system may include one or some, in any possible combination, of the following: first grip located at the first angle to the second grip, which is an acute angle, the second angle to the third capture, which is an obtuse angle, the case of exciting the system consists of a first half and a second half, the first half is detachable from the second half; and/or slotted element of the first half casing, slotted element for mating with a corresponding splined element on another part.

The present invention thus created in some but not necessarily all embodiments, implementation, system, exciting the pipe with the case where the pipe is subject to seizure, and four gripper to grip the pipe, is subject to seizure, and the grippers movably connected to the housing. Such a system may include one or some, in any possible combination is x, of the following: the system has four capture containing the first gripper movably coupled to the housing, the second gripper movably coupled to the housing, the third gripper movably coupled to the housing, the fourth gripper movably coupled to the housing, the first power cylinder, movably attached to the first grip, a second power cylinder, movably attached to the second capture, the third power cylinder, movably attached to the third seizure, the fourth power cylinder, movably attached to the fourth capture, with each power cylinder adapted to move its respective gripper for fixing pipes, with grips are moved simultaneously or independently are not in unison; the first capture is below the first angle to the second grip, which is an acute angle, the second angle to the third capture, which is an obtuse angle; case exciting system has a first half and a second half, the first half is detachable from the second half; and/or slotted element of the first half casing, slotted element for mating with a corresponding splined element on another part.

The present invention thus created in some but not necessarily all, embodiments implement a method for capturing tubes at the beginning of the upper actuator, includes moving portions of the pipe gripping system located beneath the top drive unit and having a housing in which is housed a pipe, you want to capture, and four gripper to engage the pipe, is subject to seizure, and the grippers movably connected to the housing and the grip pipe four grippers exciting system.

The present invention thus created in some but not necessarily all, embodiments of the implementation methods for exciting system to hold the first element and facilitate disconnection of the first element from the second element, the first element is connected by a thread with the second element, a gripping system has a housing with a primary spline structure on it, and the first element has a secondary spline structure, and the method includes the engagement of the primary slot secondary structure with slotted structure and preventing thereby the rotation of the first element relative to the exciting system.

1. A top drive, comprising upper actuator (20) and the gripper (100, 600), United with the upper actuator (20)located beneath him and having a body and a mouth for receiving captured pipes, characterized in that it contains four capture (650, 672) for hooking captured pipes, each of which is located on arsne with cylinder (643, 652) to move to engage the pipe.

2. The device according to claim 1, characterized in that at least two of the four hooks (650, 672) are at an obtuse angle around the neckline.

3. The device according to claim 2, wherein the other two of the four hooks (650, 672) are at an obtuse angle around the neckline.

4. The device according to claim 3, characterized in that two of the four grippers located at an obtuse angle around the neck, placed in the first part (612), and the other two of the four grippers located at an obtuse angle around the neck, located in the second part (614) housing, and the first part of the case is made with selective movement from its second part.

5. The device according to claim 4, characterized in that the first part (612) housing pivoted relative to the second part, (614).

6. Device according to any one of claims 1 to 5, characterized in that at least one of the grippers (650, 672) is located at United with the body (600) to rotate the lever.

7. Device according to any one of claims 1 to 5, characterized in that the piston and cylinder have a double action, so using it is possible to move at least one of the clamps to the pipe and from it.

8. Device according to any one of claims 1 to 5, characterized in that the gripper (100, 600) is suspended on the upper actuator (20) is a, at least one pipe (o, 285i) with high resistance torque.

9. The device according to claim 8, characterized in that at least one pipe (o, 285i) with high resistance torque is sliding to provide moving a gripping device (100, 600) to the top drive and from him.

10. Device according to any one of claims 1 to 5, characterized in that it further comprises slotted element (604) on the housing is designed for mating with a corresponding splined element on another part.

11. The device according to claim 9, characterized in that it further comprises a lifting device (a, 285i) for lifting a gripping device (100, 600) for input spline element engages with a corresponding splined element on the other part for selective engagement, in this case, preferably, the neck is round, slotted element (604) runs along the perimeter of the cap, the housing includes two halves (612, 614) and the grooved element is located on one of the halves.

12. Device according to any one of claims 1 to 5, characterized in that the upper actuator (20) includes a drive shaft and coupled with it the internal blowout preventer (90).

13. The device according to item 12, characterized in that the internal blowout preventer has a main plot and pipe section suspended on it, when this is m main site is located between the upper actuator (20) and the casing gripping device (100, 600).

14. Device according to any one of claims 1 to 5, characterized in that the grippers (650, 672) are simultaneously moved.

15. The way you grip the pipe below the upper actuator (20) using a device according to one of claims 1 to 14, containing the activation of the pistons and cylinders (643, 652, 712) to move the four hooks (650, 672) for engagement of the pipe.

16. The method according to item 15, wherein the device is used with a housing having two parts (612, 614), and moves at least one of the housing parts to open the neckline.

17. The device of the top drive with the top drive (20)having a drive shaft (528), item (522)connected with the drive shaft (528)and the gripper (100, 600) for selective capture of a pipe having a mouth for receiving the pipe, suspended from the top drive (20), and containing the first spline element located near the neckline, while part (522) has a second slotted element (524) for engagement with the first spline element for selective spin-down parts for ease of unfastening the connection with the drive shaft (528) top drive, with the gripper (100, 600) contains two parts (612, 614), moved to open the cap to facilitate removal of the specified details.

18. The device according to 17, characterized in that the first spline element is located on one side (612).

19. The device according to 17, characterized in that the item is internal to the blowout preventer.

20. The device according to 17, characterized in that the first spline element contains the slots located on the concave surface.

21. The device according to 17, characterized in that the second spline element contains the slots located on the convex surface.

22. Device according to any one of p-21, characterized in that the first splined surface is located on the edge of the jutting up out of the case.

23. Device according to any one of p-21, characterized in that the gripper (100, 600) are able to move to the upper actuator (20) and from him for selective engagement and disengagement of the first and second splined members.

24. Device according to any one of p-21, characterized in that the first and second slotted contain elements arranged essentially vertically in the slots.

25. Way facilitate the removal of the details connected with the drive shaft (528) top drive (20) of the device top drive containing and absorbing device (100, 600)having a mouth for receiving the pipe element is suspended from the upper actuator (20), containing the first spline element located near the neckline, and the specified item (522)having a second slotted element (524), and having two parts (612, 614), moved to open the cap to facilitate removal of specified items, containing engages the second spline element (524) with the first spline element details (522) and slow rotation details for unfastening the connection details (522) from drive shaft (528).

26. The method according A.25, characterized in that the first spline element is located on one side (612), which held item (522).

27. The method according A.25, characterized in that it further comprises a support part (522) on the first spline element.

28. The method according to item 27, characterized in that it further comprises a support part (522) on the case.

29. The method according to item 27 or 28, characterized in that it further comprises attaching the cable to the workpiece (522) and removing items from a position of alignment with the upper actuator (20).

30. The method according to item 27 or 28, characterized in that the part (522) is internal to the blowout preventer and further comprises a connection preventer with the drive shaft.



 

Same patents:

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: process engineering.

SUBSTANCE: invention relates to automation of pipe running and pulling in oil extraction. Proposed device comprises drilling data base that stores records about pipe elements, controlled-torque wrench with rotation drive, and controller. In screwing off, controller detects records in drilling data base on type of pipe elements to allow wrench torque control or that of rotary device to connect additional pipe section to pipe casing, or to screw off joint between pipe elements in compliance with parametres of given pipe elements joint. Various components of drilling unit incorporate transducers, magnitudes transmitted by said transducers being controlled. Simultaneously with screwing off/on jobs, timers are initiated. When magnitudes red by transducers fall beyond preset range, or when performance of aforesaid jobs last too long to completion, emergent situations originate.

EFFECT: acceleration of jobs at drilling site.

26 cl, 3 dwg

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

FIELD: transport.

SUBSTANCE: device for moving, connecting and disconnecting pipe section with pipe column contains pipe engagement assembly made capable to be connected with driving shaft of upper drive to transfer torque during pipe section spinning up/down. Herewith, pipe engagement assembly has self-engaging ball and cone assembly made capable to engage with pipe section. Ball and cone assembly is resistive to both static and dynamic load and is configured to carry total weight of pipe column during simultaneous rotation and vertical movement of the pipe column in a well. Pipe engagement assembly may be made interchangeable with internal or external pipe section gripper with power disengager controlled by hydraulic or pneumatic system, and with locking mechanism. Ball and cone assembly contains multiple balls with at least one direction inside multiple cones; herewith, multiple cones are oriented in at least two different directions. The claim also includes methods for engagement and disengagement of pipe section with pipe column using the said device.

EFFECT: reduced labour input for round trip operations.

28 cl, 8 dwg

FIELD: gas-and-oil industry.

SUBSTANCE: hydraulic key for starting screw of drilling column consists of two successively installed sections: first one hinged on bracket of drill tower and second one with fixed jaw, of movable jaw, of rocking arm, of hydro-cylinders for supply, lock, and start and of limit switch installed between bracket and first section. The first section has a slot wherein a centre pin of the second section enters. One lever of the rocking arm is pivotally connected to the movable jaw, its central part is connected to the second section, while the lock hydro-cylinder is positioned on the second lever of the rocking arm coupling it with the second section. The hydro-cylinder of supply is arranged on the drill tower and the first section; the hydro-cylinder of start is positioned on the first and second sections. Also the hydraulic key is equipped with an additional limit switch installed between the first and the second sections. Axis of the hydro-cylinder of start forms angle 45÷90° with a straight line passing through contact points of the jaw of the second section with the drilling column; also points of fixture of the hydro-cylinder of start on the first section and points of fixture of the first section on the bracket coincide.

EFFECT: increased reliability and automatic control of hydraulic key operation.

2 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: drive, rotating chuck kinematically tied with drive, and unit of fixation and axial feed of pump rod are mounted on foundation. The rotating chuck corresponds to end flanges coaxially arranged and rigidly tied, and to two rings installed between the flanges; the chuck is inserted between rings of a separator. The separator is equipped with offset cams arranged on axes and has slots and lugs correspondingly interacting with lugs and recesses of the cams.

EFFECT: expanded process functionality and arsenal of stationary tools for tube bases and repair shops of oil industry enterprises.

3 cl, 4 dwg

FIELD: oil and gas production.

SUBSTANCE: round-trip device comprises oil-well tubing, a pipe wrench pipe wrenchand a spider accommodating elements provided with both hardened profiled, and the smooth unhardened surfaces to interact. The invention provides designing of the hardened profiled elements on external surface patches of the oil-well tubing within interface with the oil-well tubing and spider which are provided by the elements with the smooth unhardened surfaces.

EFFECT: higher reliability of the current equipment by decreasing the probability of parting and dropping the various fragments of the round-trip device.

FIELD: oil and gas production.

SUBSTANCE: fixing mechanism includes a pair of clamping jaws, rods and hydraulic cylinder as drive, which are connected to them. At that, mechanism also includes the lever installed with possibility of being turned, longitudinal rod and reverse lever. At that, hydraulic cylinder is connected to the lever, one end of which is connected to rod connected to the first clamping jaw, and its other end is connected by means of longitudinal rod to reverse lever connected by means of rod to the second clamping jaw.

EFFECT: improving operating reliability and reducing the cost owing to simplified device design.

2 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production, particularly to design of devices for piping elements fastening, installed on automatic drilling tongues, meant for screwing/loosening pipes thread connections. Device for piping elements fastening contains drive rotor gear with connector, which meshed to drive gear and additional rotor gear, installed in alignment with the first one. At that on rotor gear fixed coil with rope wrapped around, equipped with backward string mechanism, and guiding rollers, made for rope movement direction guiding, and on the additional rotor gear installed carrier, needed for rope end fixing.

EFFECT: device allows to work with all the pipe types, used in oil-and-gas production, also allows without special operations switch from one pipe type to another, which allows to fasten and automatise boring rig descending - lifting up operations.

6 dwg

FIELD: mining.

SUBSTANCE: invention refers to boring equipment, particularly to boring stationary spinning wrenches for screwing and unscrewing drill pipes of oil assortment. Here is disclosed the stationary spinning wrench consisting of a case, of lower and upper pipe clamping devices installed therein, of a driven engine (hydro-motor), of a gear box, of a torque gage, of a breaking device, of a support column, and of a remote control panel. Also the gear box is made four-stage, where there is obtained an optimal combination of torque and number of revolutions for each of operations: screwing, tightening, releasing and unscrewing joints of pipes facilitating increased efficiency of the wrench operation. Notably, the gear box has two intermediate shafts and two movable friction clutches operated by means of hydro-cylinders. The torque gage includes the hydro-cylinder installed between the case of the gear box and the case of the wrench; the torque gage equalizes reactive force from the gear box at screwing and tightening joints with hydraulic pressure force in the internal cavity of the hydro-cylinder; the torque gage also includes a manometer measuring pressure in the hydro-cylinder and an automatic relief valve.

EFFECT: upgraded efficiency, reliability and quality of executed operations and reduced power consumption of spinning wrench operation.

2 cl, 9 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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