Method and device for drill string running and pulling in well
FIELD: oil and gas industry.
SUBSTANCE: claimed group of inventions is related to method and device for round-trip well operations. The device for drill string running and pulling in a well comprises at least two pulling-and-running devices. Pulling-and-running devices are installed near opening at the drill site intended for string receipt. Notwithstanding one or several more pulling-and-running devices each pulling-and-running device is made to fix the string or the string section and to move the string or the string section in axial direction as well as to rotate the string section around its axis during axial movement. Each pulling-and-running device is equipped with pipe grab installed over opening at the drill site and made to move the string in axial direction. The pipe grab comprises a unit that ensures detachable connection with the string, prevents its rotation and a unit that is installed at or close to the string end and made to prevent rotation of the string section around its axis and to move the string section in axial direction. At that units of the pipe grab are made so that they may be removed from motion path of one or several running-and-pulling devices.
EFFECT: invention ensures reduction of round-trip time and improvement of automatic control over these operations.
5 cl, 2 dwg
The technical field to which the invention relates.
The proposed device for lowering and lifting the pipe string, in particular a device containing at least two interacting tripping device, which is installed near the holes at the drill site, intended for the reception of the column, and which are made with the capability of independently from each other or in concert with each other to fix the column with the ability to detach and move the column in the direction of its axis and also to move the section of the column in the direction of the axis of the column and rotate the specified partition columns around the axis of the column.
The level of technology
The replacement of manual operations with pipes on drilling rigs for motorized and remotely controlled operations during exploration and industrial drilling, in particular for oil and gas, the efficiency when running or lifting of the drill string on the so-called operations running, lifting the drill string (tripping), or similar transactions with other columns of the pipe, such as casing, decreased significantly. While manual screwing or unscrewing 60-sectional columns were usually performed for one hour, at the present time, productivity has fallen by half. When deepwater drilling and during drilling squag the n with increasing depth now used in a very long drill string, if this ever increasing need to reduce the time of lowering and lifting and lowering the cost of performing these operations.
According to the modern technology of descent of the drill string in the well drill string is going step by step from sections containing one, two or three pipe connections. Part of the drill string which is lowered into a borehole (or riser that connects well with the installation on the surface, if the drilling is done in the sea), is suspended from the rig floor using a wedge mechanism (V-grip), and the drill string is lengthened to a new section of the column, which descends from the catwalk to the pipe on the drill string, and is joined by means of machine pipe wrench, thus preventing rotation of the drill string due to the fixing part protruding above the drilling platform that holds the key. After the new section of the column is attached to the drill string, the drill string is lowered to a height corresponding to the height of the added section of the column, and the process repeats. When lifting this sequence of operations is performed in reverse order.
When the drill string is stopped to add or remove a column section, there is a danger that the drill string may become stuck in the borehole due to the differential pressure is in the borehole, or fragments of the open part of the well can be separated and rasklinivat drill string, etc., This danger will cost you a lot of time to release the drill string; a drill string may have to be removed to repair the damage.
From WO 03/102350 known drilling rig is made with the possibility of Assembly and disassembly of the well pipe and including machine pipe wrench intended for rotation of the upper section of the column that holds the key intended for fixing the lower downhole pipe and wedge Assembly installed on the rig floor and is designed for the suspension of the drill pipe. Machine pipe wrench and holding the key can be moved in the axial direction of the borehole pipe.
SA 2207832 describes a method of removing from a well rod, which is a composite column casing, for example rod deep pump. Describes how a column section and boom section alternately vivenciada of the drill string and rod, respectively, by means of retaining key machine and a pipe wrench.
From WO 2005/056975 known machine pipe wrench with a one-piece guide sleeve surrounding the vertical Central axis of the drilling centre and the drill string. Machine pipe wrench, which is used together with placed below UD is rivalship key can move in the vertical direction to place the pipe connection that is required to disassemble or connect.
US 5060542 describes machine pipe wrench, comprising three gripping jaws, of which only the combination of the two jaws is functional during the entire time required to assemble or disassemble drill string. This is ensured by the fact that the native pipe wrench can move vertically to adjust the position of the corresponding pair of clamping jaws on the pipe connection.
In the following description, the terms "column" and "section columns" are not limited only to the drillstring or casing, but include all types of columns of tubes formed by the struts of the sections of the columns, which are connected to the drilling rig and gradually move down as you increase the length of the column.
Disclosure of inventions
The objective of the invention is to eliminate or reduce at least one of the disadvantages of the known prior art.
This task is solved in accordance with the following description and the appended claims.
The invention relates to a device for performing a tripping operation, usually for lowering the drill string into the well to lift the drill string from the well, or for planting, and possibly lifting the casing. The device contains at least two interacting tripping device, which is installed near the hole of the well to the rig floor and each of which provides fixing columns, move columns in the axial direction and rotation of the column section from moving in the axial direction with respect to the column, so as to attach the section of the column to the column and disconnect the section of the column from the column, respectively, while the column is lowered into the hole or raised from the well, and one or more other lifting devices are moved into position to capture the next section of the column, you want to attach to the column or to disconnect from the column, respectively, when the previous section columns are fully attached to the column or detached from the column, respectively. Thanks to this alternate action of at least two lifting devices made according to the invention provides the possibility of continuous descent or lifting during installation or removal and, thus, increases the performance compared to mechanized tripping of the prior art.
The first aspect of the invention, in particular, relates to a device for lifting operations to the / establishment, which contains two or more acting in concert with each other lifting devices, installed at the openings of the wells on the drilling site, which is intended to receive the column, with each lifting device independently from one or more other or in concert with one or more other lifting devices provides fixation of the column or column section, move the column or column section in its axial direction and rotation of the column section around the axis of the column while moving in the axial direction of the column.
Tripping device can be equipped with pipe grip, which can be located above the bore hole at the drill site and are able to move in the direction of the axis of the column, with pipe grip contains a tool that provides a rigid connection with the column, with the possibility of rotation and detached and which can withstand the weight of the column, and means mounted on the end or near the end of the column and capable of rotating section of the column around the axis of the column and move the section of the column in the direction of the axis of the column.
Tool pipe grip, designed for fixing the column and the column section and the rotating section of the column can be designed in such a way that it was removed from the trajectory of the one or more other interacting tripping devices.
Each is runny capture can be connected with the lift, which is designed to move the tubular grip and fixed column or section of the column, respectively, in the direction of the axis of the column.
At least one tripping device may be provided with a pipe manipulator.
The second aspect of the invention, in particular, relates to a method for performing lifting operations, with the specified method includes the following operations:
a) the column is suspended with the possibility of disconnection in the first tripping device and lowered in the direction of the axis of the column in the well.
b) the first section of the column is suspended with the possibility of disconnection in the second tripping device;
C) the specified section of the column is moved, with its end, which must be attached to the column, is directed to the corresponding end of the column and the section of the column is rotated relative to the column and is moved in the axial direction until, until there is a rigid connection with the column during continuous movement of the column in the direction of its axis;
g) the first lifting device is detached from the column during continuous movement of the column in the direction of its axis to place the lengthening of the column;
d) the second section of the column is suspended with the possibility of disconnection in the first tripping device, and you is within each group operation), described for the first section of the column;
e) a second lifting device is detached from the column and the operation is performed g), described for the first tripping device; and
W) operations b) to (e) are repeated during continuous movement of the column for the following sections of the column up until the column will not have the desired length.
This method may also include the operation:
C) column rises from the well by performing operations (a)-f) in reverse order.
Brief description of drawings
Below is a description of a preferred embodiment of the invention with reference to the accompanying drawings, on which:
figure 1 is a side view schematic diagram of the device according to the invention; and
figure 2 is a top view of the device of figures 1 and pipe manipulator designed to move the column sections between the stand pipe and the center of the drilling site.
The implementation of the invention
Rig 2, including the so-called drilling pad 21 with a hole 211 wells on the drilling site, intended for the transmission devices used during the drilling of the well 5, which passes down into the underground reservoir 6, the first and second lifting devices 3, 3'. From rig 2 in the direction of the well is known column 1, designed to move the tool (not shown) for the development of wells 5, for example a so-called drill string with the drill bit. An alternative to this column 1 may be a casing, which must be installed in the borehole 5.
Column 1 is assembled from several sections 11, 11' of the column. Reference number 11 indicates the first section of the column, which is attached to the end 12 of the pillar 1, and reference number 11 indicates a second section of the column, following the first section 11 of the column in the column 1. Sections 11, 11' columns include known means for detachable connection, for example the ends respectively with the inner and outer threaded sections.
Tripping device 3, 3' are functionally identical, and each includes a tubular grip 31, which is connected with the lift 32, intended for vertical movement of the pipe gripping 31 along the guide 33 machine pipe wrench.
Pipe gripper 31 is supplied with the machine trumpet key 311, which is designed to rotate the section 11, 11' of the column relative to the column 1 at a predetermined torque. Holding the key 312 is designed for consistent use with machine trumpet key 311 so that, when a native pipe wrench 311 is located at the lower end of section 11.11 is the' columns, you want to attach to the column 1 or detach from column 1 that holds the key 312 can be positioned in the upper end 12 of the pillar 1 for hanging columns, usually directly under the ledge of a threaded coupling. Holding the key 312 is designed for fixation of the column 1 with the possibility of disconnection, when the section 11, 11' of the column is screwed to attach to the column 1 or otentials to detach from the column 1, as well as for hanging column 1 in the tripping device 3, 3' to lower or raise the column 1 by means of the lift 32 tripping device 3, 3'. Pipe gripper 31 is designed in such a way that at least in the working position the centers of machine pipe wrench 311 and retaining key 312 coincides with the Central axis of the column 1.
Machine pipe wrench 311 and retaining key 312 may be deduced from their working area in the radial direction from the Central axis of the column 1 to skip moving vertically tubular grip 31, which in the working position is connected with the column 1 or section 11, 11' of the column. This is schematically shown in figure 2, where the parts of the machine pipe wrench 311 and retaining key 312 covering the convoy, turned away from the column 1.
Pipe manipulator 34 is designed so that the sections 11, 11' of the column was peremeschat settled between rack for tubes 4 and the working area of the tripping device 3, 3' in order to provide the tripping device 3, 3' sections 11, 11' of the column with the installation of the column 1 or to remove section 11 of the column when disassembling the column 1.
Each tripping device 3, 3" is intended for connection sections 11, 11' of the column to the column 1, while column 1 continuously falls through the hole 211 of the borehole on the drill site or to detach the sections 11, 11' of the column from the column 1, while column 1 continuously rises from the hole 211 of the borehole on the drill site.
The specified connection during continuous movement of the column 1 is provided tubular arm 34, which places the first section of the column 11 together with the corresponding attached tool, for example with the drill bit section of the drill string in the center of the drill pad 21, which is tubular grip 31 of the first tripping device 3 and by means of retaining key 312 captures the upper end of the section 11 of the column. Pipe gripper 31 is lowered along the guide 33 machine pipe wrench. At the same time pipe grip 31 of the second tripping device 3" rises up to take second section 11" column, and it holds the key 312 captures the upper end of the second section 11' of the column. The second section 11' of the column is moved to the stop in the upper end of the first section 11 is Ronny, which is constantly omitted, and machine pipe wrench pipe 311 grip 31 of the first tripping device 3 captures the lower end of the second section 11' of the column. When pipe grip 31 of the second tripping device 3' weakens hard coverage around the second section 11' of the column, but retains a position that stabilizes the position of the section 11' of the column, the second section 11' of the column starts to rotate under the action of the machine pipe wrench 311 of the first tripping device 3. After performing a connection with a pre-installed torque tube grip 31 of the second tripping device 3' is again tightly covers the second section 11" column, with the first lifting device 3 is detached from the column 1 and is moved in the vertical direction in order to adopt a new section 11 of the column.
When lifting and dismantling of the column 1 of the above described operations are performed in reverse order.
Thanks to the concerted movements and continuous descent or, alternatively, the lifting columns 1, achieved the desired effect, namely the mounting or Dismounting, respectively, of the column without constant stops the movement of the column during the execution of the so-called tripping operation.
1. Device for lowering and lifting the pipe string in the well containing at least Fe is tripping device (3,
3'), which is installed near the hole (211) on the rig floor which is intended for reception of the column (1), characterized in that each lifting device (3, 3'), regardless of one or more other lifting devices, with the ability to capture column (1) or section (11) of the column and move the column (1) or section (11) of the column in its axial direction and to rotate the section (11) of the column around the axis of the column (1) during axial movement of the column (1), providing, thus, in the common operation of the Assembly or disassembly of the column (1),
each lifting device (3, 3') is provided with a pipe gripper (31), which is mounted above the opening (211) on the rig floor and is arranged to move in the axial direction of the column (1),
and pipe grip (31) includes a means (311), which provides a detachable connection with the column (1) to prevent its rotation, and which can withstand the weight of the column (1), and means (312) installed on the end (12) or near the end (12) of the column (1) and rotatably section (11) of the column around the axis of the column (1) and move the section (11) of the column in the axial direction of the column (1),
this means (311, 312) of the pipe gripper (31) intended for fixing columns (1) and section (11) of the column, and the e for rotation section (11) of the column, designed in such a way that they can be removed from the trajectory of the one or more other lifting device (3, 3').
2. The device under item 1, characterized in that each tubular grip (31) is connected with the lift (32), which is designed to move the pipe gripper (31) and fixed columns (1) or section (11) of the column in the axial direction of the column (1).
3. The device under item 1, characterized in that at least one of the lifting device (3, 3') is provided with a tubular arm (34).
4. A way of lowering and lifting the pipe string in the well containing the operation (a), according to which hung, with removable, column (1) in the first tripping device (3) and put it in the axial direction of the column (1) in the hole (5),
characterized in that it also contains the following:
b) suspend, with the possibility of disconnection, the first section (11) of the column in the second tripping device (3'), and used the first and second lifting device (3, 3') are functionally identical;
C) moving the first section (11) of the column, while its end, which must be attached to the column (1), is directed to the appropriate end (12) of the column (1), and rotate the section (11) of the column relative to the column (1) from moving in the axial direction until until is going to be installed in rigid connection with the column (1), during continuous movement of the column (1) in its axial direction;
g) removing the first lifting device (3) from column (1) during continuous movement of the column (1) in its axial direction to place the lengthening of the column (1);
d) hung, with the possibility of disconnection, the second section (11') of the column in the first tripping device (3) and perform the operation), as for the first section (11) of the column;
e) disconnect the second lifting device (3') from columns (1) and perform an operation g), as for the first tripping device (3); and
g) repeating operations (b) to (e) for the following sections (11') of the column up until column (1) will not have the desired length.
5. The method according to p. 4, characterized in that
C) raise the column (1) of the bore (5) by performing operations (a)-f) in reverse order.
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to equipment used for servicing and repair of oil and gas wells, particularly, to mechanised pipe wrenches. Pipe wrench driven jaw comprises head designed to receive the hook with threaded end. Note here that said threaded end is secured to head end opposite the hook-like end with adjusting wrench equipped with hydraulic drive. Note here that adjusting wrench can be actuated by control unit for opening/closing the jaws or handling different-diameter pipes.
EFFECT: pipe wrench for fast handling of pipes.
20 cl, 16 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to pipeline joints, for example, coupling and nipple joint. Machine comprises headstock (4), nipple clamp-and-revolve chick (5), rpm first transducer (6) of first element (1) arranged at headstock (4) and articulated with headstock (4) drive shaft, pipe (3) rpm transducer (7) to interact with pressure roller (8), clamp (9) arranged to slide along pipe (3) axis and force transducers (10) arranged at opposite sides of clamp (9). Said clamp (9) is equipped clamping chuck (11) rigidly jointed with rotary shaft (12) and two-arm lever (13) interacting with force transducers (10). Pipe (3) rests on supports (14) of frame (15). Machine control system (16) incorporates a display (17).
EFFECT: reliable tightening of the joint between two pipes.
FIELD: machine building.
SUBSTANCE: combined grab retraction control mechanism includes a gripping tool with radial gripping elements and a grab retraction control mechanism containing an annular housing with a central inner channel and a peripheral outer surface, stiff spokes and guide spokes located on the annular housing so that they can radially move from retracted position to engaged position. According to the method of enlarging the grab working range, the gripping tool is provided with radial gripping elements; the above grab retraction control method is provided; the item or the cylindrical gripping tool is installed in a central inner channel of the annular housing and the other item or the cylindrical griping tool around peripheral outer surface of the annular housing with spikes located in annular space between gripping elements of the gripping tool and the item. One end of each spoke is engaged with gripping elements, and the other end of each spoke is directly or indirectly engaged with the item; gripping elements of the gripping tool are moved radially so that gripping elements can exert pressure on the first end of each spoke. Besides, spokes are radially moved from retracted position to extended position and act as radial extension pieces of gripping elements of the gripping tool.
EFFECT: providing transfer of axial and torsional loads on the gripped tube item or from it; enlarging the grab working range.
16 cl, 8 dwg
FIELD: machine building.
SUBSTANCE: hydraulic clamping device comprises a clamp set on a support inside a frame to which a hydraulic cylinder casing is rigidly fixed, the hydraulic cylinder includes a piston and is capable of producing force directed along the longitudinal axis of the hydraulic cylinder and applied to the clamp. An intermediate component is adjacent to the hydraulic cylinder piston and the clamp, one of its ends is fitted by a spherical end section included in the spherical support set in the piston.
EFFECT: reducing forces applied to hydraulic cylinder piston and pushing the clamp in the directions different from the hydraulic cylinder longitudinal axis.
8 cl, 6 dwg
FIELD: oil and gas industry.
SUBSTANCE: method consists in movement of a housing of a continuous circulation tool to an adapter having a channel passing through it and intended for connection in a pipe string in the well and selective movement of drilling fluid between the housing and a side hole in the adapter; in addition, the continuous circulation tool includes a shutoff device, and actuation of a shutoff mechanism to introduce a shutoff element of the shutoff device through the side hole in the adapter for insulation of drilling fluid flow through at least one section of the channel. A system for carrying out well operations with continuous circulation of drilling fluid, which contains a continuous circulation tool interconnected with a tubular column of the well, which contains an adapter and is intended for selective shutoff of the drilling fluid flow to tubular column of the well, a pipe manipulating device near the adapter, which contains the following: a pipe wrench, pipe wrenches, a pipe wrench, a retaining wrench, a pipe wrench and a spinning wrench and a device for mechanised suspension and unscrewing of pipes.
EFFECT: maximum drilling speed.
34 cl, 27 dwg
SUBSTANCE: support unit of a hydraulic wrench rotor includes support elements arranged in the body and contacting with the end surface of the geared rim and the cylindrical external surface of a split gear of the rotor, besides, support elements are made of two cylindrical support plates installed in the body and joined together, having cavities along the inner diameter in the place of their connection, at the same time the end surface of the geared rim and the cylindrical outer surface of the split gear of the rotor contact with appropriate surfaces of the support plates cavity arranged from a composite material.
EFFECT: increased reliability of device operation with simultaneous simplification of design and cheapening of assembly and repair.
FIELD: machine building.
SUBSTANCE: rotor assembly of hydraulic wrench includes a drive rotor located in the wrench housing and having a connector, rollers contacting the drive rotor and a split bushing with jaws with plates, which are installed in it. Assembly is provided with two moving jaws with plates, which are mirror-like located symmetrically relative to axis of split bushing with a fixed jaw; at that, moving jaws have shaped curved convex and concave surfaces contacting the rollers.
EFFECT: improving operating reliability of the device and improving the productivity owing to reducing the number of readjustments during operation with pipes with simultaneous simplification in operation.
FIELD: machine building.
SUBSTANCE: invention refers to tubular products gripping and manipulation tool. Gripping tool has gripping surface that is borne against movable gripping elements and control mechanisms for radial movement of the gripping surface from retracted to extended position. Gripping tool includes control mechanisms comprising at least one control mechanism with three cam clutches, which in its turn includes drive cam clutch receiving the input rotation and tending to the rotation transfer; intermediate cam clutch receiving the input rotation only from drive cam clutch; driven cam clutch receiving the input rotation only from intermediate cam clutch; drive cam pair acting between drive cam clutch and intermediate cam clutch so that input rotation is transmitted by drive cam pair from drive cam clutch to intermediate cam clutch, and driven cam pair acting between intermediate cam clutch and driven cam clutch so that input rotation from intermediate cam clutch is transferred by driven cam pair to driven cam clutch.
EFFECT: providing the control of axial and radial movements of gripping tool surface.
10 cl, 13 dwg
FIELD: machine building.
SUBSTANCE: required values of detachment pressure are determined on the basis of rod size and/or pipe dog type. The upper and lower limits for permissible values of rod detachment pressure may be calculated on the basis of the required pressure of detachment and/or rod size. Values of rod detachment pressure below the lower limit and above the upper limit specify the necessity to analyse the rod condition in order to identify whether this rod may be used repeatedly. The values of rod detachment pressure may be recorded as data of detachment pressure for subsequent assessment, including detection of improper unscrewing of rods and poor condition of a well.
EFFECT: invention provides for identification of pipes that require replacement.
25 cl, 13 dwg
FIELD: machine building.
SUBSTANCE: top drive comprises gripping device jointed thereto and arranged there under, and four grippers each being arranged on piston with gripping cylinder. Proposed method of pipe gripping above top drive comprises activating pistons and cylinders of above said device. Invention covers also top drive with drive shaft, component coupled with said shaft and gripping device with mouth suspended to top drive and provided with first splined element. Note here that said component has second splined element for engagement with first splined element to selectively decelerate component rotation for unlocking the joint with top drive driving shaft. Note also that gripper comprises two parts that move for opening the mouth. Proposed method comprises engaging said second splined element and decelerating component rotation for unlocking the joint.
EFFECT: normal operation of top drive, easier installation, smaller installation space.
30 cl, 6 dwg
FIELD: 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.
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.
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.
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
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