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.



 

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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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