CN113803002A - Operation machine with pressure - Google Patents

Abstract

The application discloses area presses workover rig belongs to petrochemical technical field. The high-pressure operation machine comprises a sealing assembly and a clamping mechanism, wherein the sealing assembly is provided with a pipe column channel, a pipe column can move along the pipe column channel, the clamping mechanism is used for clamping the pipe column, and the clamping mechanism can drive the pipe column to be lifted or lowered from a first end of the pipe column channel. And a pipeline opening and closing part is arranged between the sealing component and the clamping mechanism, and under the condition that the pipe cable is arranged on the surface of the pipe column, the pipe cable can be separated from or attached to the pipe column from the pipeline opening and closing part. The scheme can solve the problem that the operation machine under pressure cannot be suitable for hoisting or lowering a pipe column with a cable or a pipeline.

Description

Operation machine with pressure

Technical Field

The application belongs to the technical field of petrochemical industry, concretely relates to pressure operation machine.

Background

With the yearly popularization of the application of the operation technology under pressure, the application field of the operation machine under pressure is gradually expanded. Specifically, the under-pressure operation machine can be used for under-pressure hoisting or lowering of a pipe column, under-pressure fishing, under-pressure milling and the like.

In the related art, the operation under pressure is mainly used for a pipe column without a control cable or a control pipeline on the surface of the pipe column. For a tubular string provided with a downhole safety valve or an electrical submersible pump, a control cable or pipeline of the downhole safety valve or the electrical submersible pump is arranged on the surface of the tubular string along the tubular string. Since the operation machine with pressure in the related art needs to clamp the surface of the pipe string to lift or lower the pipe string, the cable or pipeline on the surface of the pipe string is easily damaged.

Disclosure of Invention

The purpose of the embodiment of the application is to provide a pressure operation machine, can solve the problem that the pressure operation machine can not be applicable to the tubular column of taking cable or pipeline and lift by crane or transfer among the correlation technique.

In order to solve the technical problem, the present application is implemented as follows:

a kind of operating machine under pressure used for hoisting or lowering the tubular column, including seal assembly and fixture, the seal assembly has tubular column channels, the tubular column can move along the tubular column channel, the fixture is used for clamping the tubular column, and the fixture can drive the tubular column to hoist or lower from the first end of the tubular column channel;

a pipeline split-combination part is arranged between the sealing component and the clamping mechanism,

under the condition that the surface of the pipe column is provided with the pipe cable, the pipe cable can be separated from or attached to the pipe column from the pipeline splitting and combining part.

The technical scheme adopted by the invention can achieve the following beneficial effects:

in the high-pressure operation machine disclosed by the embodiment of the invention, the pipeline opening and closing part is positioned between the sealing component and the clamping mechanism, and the pipe cable can be separated from or attached to the pipe column from the pipeline opening and closing part. In the process of hoisting the pipe column, the pipe cable arranged on the surface of the pipe column can be separated from the pipe column from the pipeline split-joint part and penetrates out of the pipe column channel from the pipeline split-joint part; in the process of lowering the pipe column, the pipe cable is attached to the pipe column from the pipeline opening and closing part and enters the pipe column channel, and then the pipe column is lowered together. According to the scheme, the high-pressure operation machine can utilize the pipeline splitting and combining part to enable the surface of the pipe column at the clamping position of the clamping mechanism to be free of the pipe cable in the pipe column hoisting or lowering process, so that the pipe cable is prevented from being damaged by the clamping mechanism in the pipe column hoisting or lowering process. It should be noted that the umbilical of the surface of the pipe string described in the present application may be a control cable or a control line installed on the surface of the pipe string. Therefore, the high-pressure operation machine can be suitable for hoisting or lowering a pipe column with a cable or a pipeline.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic illustration of a high pressure work machine in a first perspective of the disclosure according to one embodiment of the disclosure;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic illustration of a tubing string running through a pipeline junction-junction according to one embodiment of the disclosure;

FIG. 4 is a schematic illustration of a seal assembly disclosed in one embodiment of the present invention in a first perspective view;

FIG. 5 is a schematic cross-sectional view of a seal assembly according to one embodiment of the present disclosure;

FIG. 6 is an enlarged view of a portion of the first place in FIG. 5;

FIG. 7 is an enlarged view of a second portion of FIG. 5;

FIG. 8 is a schematic cross-sectional view of a piston embodying the disclosure;

FIG. 9 is a schematic cross-sectional view of a connector according to one embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of a catheter disclosed in accordance with an embodiment of the invention;

FIG. 11 is a schematic view of a filter ring according to an embodiment of the present invention from a first perspective;

FIG. 12 is a schematic cross-sectional view of a filter ring according to an embodiment of the present invention;

fig. 13 is an enlarged view at a in fig. 12.

In the figure: 100-a tubular string; 110-an umbilical; 200-a seal assembly; 210-a first blowout preventer; 220-a second blowout preventer; 230-a telescoping section; 231-a cylinder barrel; 2311-a first balancing port; 2312-a second balancing port; 2313-first groove; 2314-second groove; 232-a piston rod; 233-a piston; 2331-a first bump; 2332-a second protrusion; 234-a catheter; 2341-positioning the boss; 235-a filter ring; 2351-a filtration pore; 236-cylinder cover; 240-string passage; 250-a connector; 251-a positioning groove; 300-a clamping mechanism; 310-a first clamping assembly; 320-a second clamping assembly; 330-a first drive member; 340-a second driving member; 350-a support frame; 400-pipeline split-joint part; 410-connecting column.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to fig. 1 to 13.

Referring to fig. 1 to 3, an embodiment of the present invention discloses a live working machine for hoisting or lowering a pipe string 100. Specifically, the work machine includes a seal assembly 200 and a clamping mechanism 300. The sealing assembly 200 is a basic structure, and can provide a mounting base for the clamping mechanism 300.

Referring to fig. 3 and 5, the seal assembly 200 is provided with a string passage 240, and the string 100 is movable along the string passage 240. The gripping mechanism 300 is used to grip the tubular string 100, and the gripping mechanism 300 can drive the tubular string 100 to be lifted or lowered from the first end of the tubular string passage 240. The gripping mechanism 300 is of many types, for example: a wedge clamping mechanism, a spiral clamping mechanism, an eccentric clamping mechanism, a hinge clamping mechanism and the like. For this reason, the present embodiment does not limit the specific kind of the chucking mechanism 300.

Referring to fig. 1 and 2, a line coupling part 400 is provided between the sealing assembly 200 and the clamping mechanism 300, and when the umbilical 110 is provided on the surface of the string 100, the umbilical 110 may be separated from or attached to the string 100 from the line coupling part 400. Illustratively, the line branching and joining portion 400 may be provided with an opening that may communicate with the string passage 240 such that the umbilical 110 may pass out of or into the string passage 240 through the opening. Illustratively, during hoisting of the tubular string 100, the downhole portion of the tubular string 100 may be passed out of the seal assembly 200 along the tubular string passage 240, and the umbilical 110 at the surface of the tubular string 100 is disconnected from the tubular string 100 as the umbilical 110 disposed at the surface of the tubular string 100 is moved to the line branching and joining section 400. During lowering of the tubular string 100, the tubular string 100 and the umbilical 110 pass into the seal assembly 200 along the tubular string passage 240. After the tubing string 100 is moved to the line combiner 400, the umbilical 110 first engages the surface of the tubing string 100 so that the tubing string 100 and the umbilical 110 may enter the seal assembly 200 along the tubing string passageway 240 and reach the well.

Illustratively, the line branching and joining part 400 may be a gap provided between the sealing assembly 200 and the clamping mechanism 300, or an opening or a channel formed by components between the sealing assembly 200 and the clamping mechanism 300, so that the umbilical 110 may be routed along the gap, the opening or the channel between the sealing assembly 200 and the clamping mechanism 300, and thus the umbilical 110 may be separated from or attached to the surface of the tubular string 100.

The kinds of the umbilical 110 are many, and specifically, the umbilical may be an information transmission cable, an energy supply cable, a gas transmission pipeline, a liquid transmission pipeline, or the like. For this reason, the present embodiment does not limit the specific kind of umbilical 110.

In the process of hoisting the pipe string 100, the high-pressure working machine according to the embodiment can separate the umbilical 110 on the surface of the pipe string 100 from the pipe line splitting and combining part 400, so that the umbilical 110 can penetrate out from the pipe line splitting and combining part 400, the umbilical 110 is prevented from moving to the clamping mechanism 300 along with the pipe string 100, and the umbilical 110 on the surface of the pipe string 100 is prevented from being damaged by the clamping mechanism 300. In the process of lowering the pipe string 100, the umbilical 110 may enter the pipe string passage 240 from the pipeline branching and joining section 400, and the umbilical 110 may be lowered along with the pipe string 100. Since the pipeline splitting and combining part 400 is located between the clamping mechanism 300 and the sealing assembly 200, the umbilical 110 can be prevented from being damaged by the clamping mechanism 300. Therefore, the high pressure working machine according to the above embodiment may be used for hoisting or lowering the surface of the pipe string 100 with the control cable or pipe. It should be noted that the high-pressure working machine disclosed in the above embodiment can also be used for hoisting or lowering the pipe string 100 without a control cable or a pipeline.

Referring to fig. 1 and 2, the clamping mechanism 300 includes a first clamping assembly 310, a second clamping assembly 320, and a retainer, wherein the first clamping assembly 310 and the second clamping assembly 320 are disposed on the sealing assembly 200 along the axial direction of the pipe string passage 240, and the second clamping assembly 320 is disposed on a side of the first clamping assembly 310 away from the sealing assembly 200, so that the first clamping assembly 310 and the second clamping assembly 320 can respectively clamp different positions of the pipe string 100. The first gripper assembly 310 is movable relative to the seal assembly 200 in the axial direction of the tubular string passage 240 to effect hoisting or lowering of the tubular string 100 by the first gripper assembly 310 being relatively far from or close to the seal assembly 200.

Illustratively, the first clamping assembly 310 may be switchable between a first position and a second position, with the first clamping assembly 310 moving from the second position to the first position, the first clamping assembly 310 gradually approaching the second clamping assembly 320. As the first clamping assembly 310 moves from the first position to the second position, the first clamping assembly 310 gradually moves away from the second clamping assembly 320.

The hoisting string 100 may include the following steps:

at step 101, the second gripper assembly 320 is closed such that the second gripper assembly 320 can grip the fixed tubular string 100.

Step 102, opening the first clamping assembly 310;

in step 103, the first clamping assembly 310 is controlled to move to the second position, i.e. the first clamping assembly 310 is controlled to move to a direction close to the sealing assembly 200. Illustratively, the first clamping assembly 310 may be controlled to move to the second position.

104, closing the first clamping assembly 310 so that the first clamping assembly 310 can clamp the fixed pipe string 100;

step 105, opening the second clamping assembly 320;

at step 106, the first clamping assembly 310 is controlled to move to the first position, i.e., the first clamping assembly 310 is controlled to move away from the sealing assembly 200. Optionally, the first clamping assembly 310 is controlled to move to the first position.

The above steps can be performed multiple times to achieve hoisting the tubular string 100.

Lowering the tubular string 100 may include the following steps:

at step 201, the second gripper assembly 320 is closed such that the second gripper assembly 320 can grip the fixed tubular string 100.

Step 202, opening the first clamping assembly 310;

in step 203, the first clamping assembly 310 is controlled to move to the first position, i.e., the first clamping assembly 310 is controlled to move away from the sealing assembly 200. Optionally, the first clamping assembly 310 is controlled to move to the first position.

Step 204, closing the first clamping assembly 310 so that the first clamping assembly 310 can clamp the fixed pipe string 100;

step 205, opening the second clamping assembly 320;

at step 206, the first clamping assembly 310 is controlled to move to the second position, i.e., the first clamping assembly 310 is controlled to move in a direction approaching the sealing assembly 200. Optionally, the first clamping assembly 310 is controlled to move to the second position.

The above steps may be performed multiple times to effect lowering of the tubular string 100.

It should be noted that the above embodiments only disclose an alternative embodiment of hoisting the tubular string 100 or lowering the tubular string 100, and the sequence of the steps can be adjusted as required during the actual operation. For this reason, the above embodiments do not limit the operation steps of the high pressure working machine for hoisting the pipe string 100 or lowering the pipe string 100 according to the present application.

Illustratively, the second clamping assembly 320 is movable relative to the seal assembly 200 along the axial direction of the string passage 240, and a stopper is disposed on the second clamping assembly 320 and/or the seal assembly 200 for limiting the second clamping assembly 320 to move along the axial direction of the string passage 240. In this embodiment, the distance between the second gripping assembly 320 and the seal assembly 200 can be adjusted by controlling the second gripping assembly 320 to move along the axial direction of the string passage 240, so that the distance between the second gripping assembly 320 and the seal assembly 200 is increased or decreased.

For convenience of illustration, the above steps 101 to 106 are defined as a hoisting cycle; steps 201 to 206 are defined as a drop cycle. The high-pressure working machine according to the above embodiment can adjust the moving distance of the pipe string 100 in a single hoisting cycle or a lowering cycle by the movement of the second clamping assembly 320. And, the height of the high pressure working machine can also be adjusted by adjusting the position of the second clamping assembly 320. For example, in the case that the working space of the high-pressure working machine is limited, or the pipe string 100 does not need to be lifted or lowered, the distance between the second clamping assembly 320 and the sealing assembly 200 can be reduced, so that the height of the high-pressure working machine is reduced, and the occupied space of the high-pressure working machine is reduced.

Illustratively, in the case where the second clamp assembly 320 moves to a predetermined position relative to the seal assembly 200, the second clamp assembly 320 may be limited by a stopper to move in the axial direction of the string passage 240. Further, the second gripper assembly 320 may grip the fixed tubular string 100 to prevent the tubular string 100 from moving downhole with the first gripper assembly 310 open.

There are many configurations of the limiting member. Illustratively, the retaining member may be a pin, a detent, a chuck, or the like. Therefore, the present embodiment does not limit the specific structure of the limiting member.

Referring to fig. 1 and 2, the gripping mechanism 300 further includes a first driving member 330 and a second driving member 340, the first driving member 330 is connected to the first gripping assembly 310, and the first driving member 330 can drive the first gripping assembly 310 to move along the tubular string 100 toward or away from the second gripping assembly 320. The second drive member 340 is coupled to the second gripper assembly 320, and the second drive member 340 can drive the second gripper assembly 320 in a direction along the tubular string 100 away from or toward the seal assembly 200. The first and second driving members 330 and 340 are of many kinds, for example: the first driving member 330 may be a hydraulic cylinder, a rack and pinion mechanism, a gear mechanism, a lead screw mechanism, etc., and for this reason, the present embodiment does not limit the kinds of the first driving member 330 and the second driving member 340. Illustratively, the limiting member for limiting the movement of the second clamping assembly 320 along the axial direction of the string passage 240 may be the second driving member 340. In particular, in case the second driving member 340 has a self-locking function, the position of the second clamping assembly 320 relative to the sealing assembly 200 may then be defined by the self-locking function of the second driving member 340.

In an alternative embodiment, the number of first drives 330 may be at least two, with at least two first drives 330 disposed about respective axes of the tubular string passage 240. Further, at least two first driving members 330 are uniformly distributed around the corresponding axis of the tubular string passage 240, so that the first clamping assembly 310 is stressed uniformly, and the bending deformation caused by the uneven stress of the first clamping assembly 310 can be avoided. Likewise, the number of second drives 340 may be at least two, with at least two second drives 340 disposed about corresponding axes of the string passage 240. Further, at least two second driving members 340 are uniformly distributed around the corresponding axis of the tubular string passage 240, so that the second clamping assembly 320 is stressed in a balanced manner, and bending deformation caused by uneven stress of the second clamping assembly 320 is avoided.

Referring to FIG. 2, in an alternative embodiment, each of the first gripping assembly 310 and the second gripping assembly 320 includes at least one slip set such that each of the first gripping assembly 310 and the second gripping assembly 320 may grip the tubular string 100 via the slip sets. Optionally, the first gripping assembly 310 includes a first slip set and a second slip set, the first slip set and the second slip set being disposed along the axial direction of the tubular string 100, wherein the first slip set is configured to overcome the force of the tubular string 100 in a direction away from the bottom hole, and the second slip set is configured to overcome the weight of the tubular string 100, such that the first gripping assembly 310 may provide forces in both directions up the tubular string 100 or down the tubular string 100. Further, the second gripping assembly 320 may include a third slip set and a fourth slip set disposed along the axial direction of the tubular string 100. Wherein the third slip set is configured to overcome forces in a direction of the pipe string 100 away from the bottom hole and the fourth slip set is configured to overcome the weight of the pipe string 100 such that the second gripping assembly 320 may provide forces in both directions up the pipe string 100 or down the pipe string 100.

Referring to fig. 1, the clamping mechanism 300 further includes a support bracket 350, and the support bracket 350 may provide a mounting base for the base structure to the first driving member 330, the second driving member 340, the first clamping assembly 310 and/or the second clamping assembly 320. Alternatively, the support bracket 350 may be connected to the seal assembly 200, and the first driving member 330 and the second driving member 340 may be disposed on the support bracket 350. Referring to fig. 1, the supporting frame 350 may be fixedly disposed on the sealing assembly 200, thereby providing support for the first driving member 330 and the second driving member 340. In particular, the support bracket 350 may be coupled to the seal assembly 200 by screws. The first driving member 330 and the second driving member 340 may be fixedly disposed on the supporting frame 350.

In an alternative embodiment, the first driving member 330 and the second driving member 340 are both telescopic cylinders, so that the first clamping assembly 310 and the second clamping assembly 320 are driven to move along the axial direction of the pipe string 100 relative to the sealing assembly 200 by the extension or contraction of the telescopic cylinders. Specifically, a first end of the first driving member 330 is connected to the first clamping assembly 310, and a second end of the first driving member 330 is connected to the supporting frame 350. A first end of the second driving member 340 is connected to the second clamping assembly 320, and a second end of the second driving member 340 is connected to the supporting bracket 350.

In an alternative embodiment, the seal assembly 200 may be sealingly engaged with a surface of the tubing string 100 to prevent fluid from leaking out of the line junction 400 for operation under pressure. In particular, the seal assembly 200 may be provided with a sealing mechanism, such as a blowout preventer, to sealingly engage a surface of the tubular string 100 through the blowout preventer. Referring to fig. 1-4, a seal assembly 200 may include a first blowout preventer 210, a second blowout preventer 220, and a telescoping portion 230. The first blowout preventer 210 is disposed at a first end of the telescopic portion 230, the second blowout preventer 220 is disposed at a second end of the telescopic portion 230, the first clamping assembly 310 is connected to the first blowout preventer 210 and/or the first end of the telescopic portion 230, and the first clamping assembly 310 can drive the telescopic portion 230 to extend or shorten. With the first gripper assembly 310 closed and moving the tubular string 100, the second gripper assembly 320 and the second blowout preventer 220 are open, and the first blowout preventer 210 is closed; with the first gripper assembly 310 open and moving relative to the tubular string 100, the first blowout preventer 210 is open and the second gripper assembly 320 and the second blowout preventer 220 are closed.

The hoisting string 100 may include the following steps:

at step 301, the second gripper assembly 320 is closed such that the second gripper assembly 320 can grip the fixed tubular string 100.

Step 302, closing the second blowout preventer 220 to seal the second blowout preventer 220 with the surface of the tubular string 100;

step 303, opening the first clamping assembly 310;

step 304, the first blowout preventer 210 is opened to prevent the tubular string 100 from being forcibly pulled out of the first blowout preventer 210.

In step 305, the first driving member 330 is controlled to drive the first clamping assembly 310 to move to the second position, i.e., the first clamping assembly 310 is driven by the first driving member 330 to move to a direction close to the sealing assembly 200. Specifically, the first driving member 330 may be controlled to drive the first clamping assembly 310 to move to the second position.

Step 306, closing the first gripping assembly 310 so that the first gripping assembly 310 can grip the fixed tubular string 100;

step 307, closing the first blowout preventer 210 to seal the first blowout preventer 210 from the surface of the tubular string 100;

step 308, opening the second clamping assembly 320;

step 309, opening the second blowout preventer 220;

3010, the first driving member 330 is controlled to drive the first clamping assembly 310 to move to the first position, that is, the first clamping assembly 310 is driven by the first driving member 330 to move away from the sealing assembly 200. Alternatively, the first driving member 330 may be controlled to drive the first clamping assembly 310 to move to the first position.

The above steps can be performed multiple times to achieve hoisting the tubular string 100.

Lowering the tubular string 100 may include the following steps:

at step 401, the second gripper assembly 320 is closed such that the second gripper assembly 320 may grip the fixed tubular string 100.

Step 402, closing the second blowout preventer 220 to seal the second blowout preventer 220 from the surface of the tubular string 100;

step 403, opening the first clamping assembly 310;

the first blowout preventer 210 is opened 404 to prevent the tubular string 100 from being forcibly pulled out of the first blowout preventer 210.

Step 405, the first driving member 330 is controlled to drive the first clamping assembly 310 to move to the first position. Specifically, the first driving member 330 may be controlled to drive the first clamping assembly 310 to move to the first position.

Step 406, closing the first gripping assembly 310 so that the first gripping assembly 310 can grip the fixed tubular string 100;

step 407, closing the first blowout preventer 210 to seal the first blowout preventer 210 with the surface of the tubular string 100;

step 408, opening the second clamping assembly 320;

step 409, opening the second blowout preventer 220;

step 4010, the first driving member 330 is controlled to drive the first clamping assembly 310 to move to the second position. Alternatively, the first driving member 330 may be controlled to drive the first clamping assembly 310 to move to the second position.

The above steps may be performed multiple times to effect lowering of the tubular string 100.

It should be noted that the above embodiments only disclose an alternative embodiment of hoisting the tubular string 100 or lowering the tubular string 100, and the sequence of the steps can be adjusted as required during the actual operation. For this reason, the above embodiments do not limit the operation steps of the high pressure working machine for hoisting the pipe string 100 or lowering the pipe string 100 according to the present application.

The high-pressure working machine according to the above embodiment can alternately seal the tubular string 100 by the first blowout preventer 210 and the second blowout preventer 220, and prevent the tubular string 100 from being forcibly pressed in or pulled out of the first blowout preventer 210 and/or the second blowout preventer 220 in the process of lowering or hoisting the tubular string 100, so that the purpose of protecting the first blowout preventer 210 and the second blowout preventer 220 in the high-pressure working machine can be achieved.

Referring to fig. 1 and 2, a pipeline split 400 is provided with at least two connection columns 410, the connection columns 410 being spaced around the tubular string 100, with a first end of the connection columns 410 being connected to the first clamping assembly 310 and a second end of the connection columns 410 being connected to the first blowout preventer 210. Specifically, the umbilical 110 may be passed out of or into the gap between the connection strings 410 to effect separation or engagement of the umbilical 110 from the tubular string 100.

Illustratively, the connection strings 410 may be evenly distributed along the circumference of the tubular string 100 to ensure that the first blowout preventer 210 and the first clamp assembly 310 are evenly stressed.

Referring to fig. 3 to 7, the telescopic part 230 may include a cylinder 231, a piston rod 232, a piston 233, and a guide pipe 234. The guide pipe 234 is disposed in the cylinder 231, and a first end of the guide pipe 234 is connected to a first end of the cylinder 231. The piston rod 232 and the piston 233 are both located in the cylinder 231, and the piston rod 232 and the piston 233 are both sleeved on the guide pipe 234. The piston 233 is in sealing engagement with the guide 234, and the piston 233 is in sealing engagement with the inner wall of the cylinder 231. Illustratively, the piston 233 may be in sealing engagement with the outside of the conduit 234. A first end of the piston rod 232 is connected to the piston 233, a second end of the piston rod 232 is connected to the first blowout preventer 210 and/or the first clamping assembly 310, and the piston rod 232 can slide the piston 233 along the cylinder 231. Illustratively, the piston 233 may be slidably sealed with the conduit 234 and the cylinder 231. In an alternative embodiment, the outer side wall and the inner side wall of the piston 233 are provided with sealing grooves, and sealing rings are arranged in the sealing grooves, so that the piston 233 is slidably sealed with the guide pipe 234 and the cylinder 231 respectively through the sealing rings.

In the above embodiment, the clearance between the cylinder 231 and the piston rod 232 is sealed by the piston 233, thereby preventing liquid leakage. The second end of the piston rod 232 is connected to the first blowout preventer 210 and/or the first clamping assembly 310, so that the first clamping assembly 310 can drive the first blowout preventer 210 to move synchronously, and further, the surface of the tubular string 100 can be sealed by the first blowout preventer 210 in the process that the tubular string 100 is driven by the first clamping assembly 310 to move, and the tubular string 100 is prevented from being forcibly pulled out or pressed in from the first blowout preventer 210. The guide pipe 234 can reduce the pressure applied to the piston 233, thereby not only ensuring the sealing performance between the piston 233 and the cylinder 231, but also prolonging the service life of the piston 233.

In an alternative embodiment, the support bracket 350 may be connected to the cylinder 231. Referring to fig. 1 and 4, the cylinder 231 is provided with a boss, and the support bracket 350 may be fixedly disposed on the boss. The supporting frame 350 is fixedly connected to the cylinder 231, so that the first driving member 330 can drive the first clamping assembly 310 and drive the piston rod 232 to move by using the first clamping assembly 310.

In an alternative embodiment, piston 233 sealingly engages the surface of conduit 234 to prevent well fluid from escaping along the gap between piston rod 232 and conduit 234. Further, the gap between piston rod 232 and conduit 234 communicates with tubing string passage 240 to equalize the pressure within the gap between piston rod 232 and conduit 234. Specifically, during extension of the telescoping portion 230, liquid or gas in the gap between the piston rod 232 and the conduit 234 may enter the string passage 240. During shortening of bellows 230, liquid or gas may enter the gap between piston rod 232 and conduit 234 from tubing string passage 240.

In an alternative embodiment, the first end of the cylinder 231 is provided with a first equalizing port 2311, and the gap between the conduit 234 and the cylinder 231 communicates with the first equalizing port 2311. The second end of the cylinder 231 is provided with a second balance port 2312, and the gap between the piston rod 232 and the cylinder 231 communicates with the second balance port 2312.

In the above embodiment, the pressure in the gap between the guide pipe 234 and the cylinder 231 can be balanced by the first balancing port 2311 during the expansion or contraction of the bellows 230 by providing the first balancing port 2311. Specifically, during extension of the bellows 230, gas or liquid in the gap between the conduit 234 and the cylinder 231 may be vented from the first equalizing port 2311. During shortening of the bellows 230, liquid or gas may enter the gap between the conduit 234 and the cylinder 231 from the first equalizing port 2311. Likewise, the second equalizing port 2312 may equalize the pressure in the gap between the piston rod 232 and the cylinder 231 during extension or contraction of the bellows 230.

In an alternative embodiment, the telescoping portion 230 further comprises a pressurization tube and a pressure relief tube. The pressurizing pipe is connected to the second equalizing port 2312 to add high-pressure liquid or gas into the gap between the piston rod 232 and the cylinder 231 through the pressurizing pipe. The pressure relief pipe is connected to the first equalizing port 2311 to discharge the liquid or gas in the gap between the conduit 234 and the cylinder 231 through the pressure relief pipe. Specifically, the pressurizing pipe may be connected to an air pump or a hydraulic pump to supply high-pressure gas or liquid through the air pump or the hydraulic pump.

In the above embodiment, the driving force of the first driving member 330 to drive the first clamping assembly 310 can be reduced by adding high-pressure liquid or gas to the gap between the piston rod 232 and the cylinder 231, and then balancing the high pressure in the well with the high-pressure liquid or gas in the gap between the piston rod 232 and the cylinder 231. By using the pressure relief pipe to discharge the liquid or gas in the gap between the conduit 234 and the cylinder 231, the formation of high pressure or negative pressure in the gap between the conduit 234 and the cylinder 231 can be avoided, and the sliding of the piston rod 232 and the piston 233 in the cylinder 231 can be facilitated.

Referring to fig. 5 to 8, in an alternative embodiment, a first protrusion 2331 is formed at a side of the piston 233 adjacent to the first end of the cylinder 231, a first groove 2313 is formed at the first end of the cylinder 231, and the first equalizing port 2311 is communicated with a side wall or a bottom of the first groove 2313. In the case where the piston 233 moves to the first end of the cylinder 231, the first protrusion 2331 may be at least partially inserted into the first groove 2313; in the case where the piston 233 moves to the second end of the cylinder 231, the first protrusion 2331 is separated from the first groove 2313.

In the above embodiment, when the piston 233 moves towards the first end of the cylinder 231 and the first protrusion 2331 is at least partially inserted into the first groove 2313, the flow rate of the liquid or gas in the gap between the cylinder 231 and the conduit 234 from the first equalizing port 2311 is reduced, so that the resistance of the piston 233 moving towards the first end of the cylinder 231 is increased to play a role of buffering, that is, the piston 233 forms a damping structure towards the first end of the cylinder 231 to reduce the impact force of the piston 233 and the first end of the cylinder 231, thereby achieving the purpose of protecting the piston 233 and the cylinder 231.

Referring to fig. 5 to 8, in an alternative embodiment, a second protrusion 2332 is formed at one side of the piston 233 close to the second end of the cylinder 231, a second groove 2314 is formed at the second end of the cylinder 231, and the second balance port 2312 is communicated with the side wall or the bottom of the second groove 2314; the second protrusion 2332 may be at least partially inserted into the second groove 2314 in case the piston 233 moves to the second end of the cylinder 231, and the second protrusion 2332 is separated from the second groove 2314 in case the piston 233 moves to the first end of the cylinder 231.

In the above embodiment, when the piston 233 moves towards the second end of the cylinder 231 and the second protrusion 2332 is at least partially inserted into the second groove 2314, the flow rate of the liquid or gas in the gap between the cylinder 231 and the piston rod 232 from the second equalizing port 2312 is reduced, so that the resistance of the piston 233 moving towards the second end of the cylinder 231 is increased, so as to play a role of buffering, that is, the piston 233 forms a damping structure towards the second end of the cylinder 231, so that the impact force of the piston 233 and the second end of the cylinder 231 is reduced, and the purpose of protecting the piston 233 and the cylinder 231 is achieved.

Referring to fig. 5 to 8, the first protrusion 2331 may be an annular protrusion and the first groove 2313 may be an annular groove. In particular, both the annular protrusion and the annular groove may surround the conduit 234. Further, the number of the first balance ports 2311 may be at least two, and each of the first balance ports 2311 may be distributed along a circumferential direction of the annular groove. The first protrusion 2331 and the first groove 2313 are annularly arranged, so that the stability of the first protrusion 2331 can be improved, and the first protrusion 2331 is prevented from being bent.

Of course, the shape of the first protrusion 2331 is many, for example: a cone shape, a cylinder shape, an arc shape, etc., and for this reason, the present embodiment does not limit a specific shape of the first protrusion 2331.

Referring to fig. 7, the first groove 2313 may be an annular gap between the guide pipe 234 and the cylinder 231. The first protrusion 2331 may be an annular protrusion that fits against the surface of the conduit 234, and the conduit 234 may be used to provide support for the first protrusion 2331 to prevent the first protrusion 2331 from bending and deforming, thereby ensuring the stability of the first protrusion 2331.

Referring to fig. 5 to 8, the second protrusion 2332 may be an annular protrusion and the second groove 2314 may be an annular groove. In particular, both the annular protrusion and the annular groove may surround the conduit 234. Further, the number of the second balance ports 2312 may be at least two, and each of the second balance ports 2312 may be distributed along the circumferential direction of the annular groove. The second protrusion 2332 and the second groove 2314 are annularly formed, so that the stability of the second protrusion 2332 can be improved, and the first protrusion 2331 can be prevented from being bent.

Of course, the shape of the second protrusion 2332 is many, for example: a cone shape, a cylinder shape, an arc shape, etc., and for this reason, the present embodiment does not limit a specific shape of the second protrusion 2332.

Referring to fig. 6 and 7, the telescopic part 230 further includes a cylinder cover 236, and the cylinder cover 236 is disposed at the second end of the cylinder 231 and connected to the second end of the cylinder 231. Optionally, the cylinder head 236 includes an insert, which may be at least partially inserted into the gap between the cylinder tube 231 and the piston rod 232. Further, the cylinder head 236 may be in sealing engagement with the cylinder bore 231. The manner in which the cylinder head 236 sealingly engages the cylinder barrel 231 is numerous and may be sealed, for example, by a gasket. The present embodiment does not limit the structure of the cylinder head 236 in sealing engagement with the cylinder tube 231.

Referring to FIG. 6, in an alternative embodiment, second groove 2314 may be an annular gap between cylinder head 236 and piston rod 232. The second protrusion 2332 may be an annular protrusion which is attached to the surface of the piston rod 232, and the piston rod 232 may be used to provide support for the second protrusion 2332, so as to prevent the second protrusion 2332 from bending and deforming, and ensure the stability of the second protrusion 2332.

Referring to fig. 5, 7, 9 and 10, the sealing assembly 200 may further include a connecting member 250, the connecting member 250 being connected to the first end of the cylinder 231, and a positioning groove 251 being provided at an end of the connecting member 250 connected to the cylinder 231. The one end that pipe 234 and cylinder 231 link to each other is provided with location boss 2341, and location boss 2341 is embedded in constant head tank 251 at least partially, and the location boss 2341 surface is contradicted with the cell wall of constant head tank 251 spacing. Specifically, the guide pipe 234 may be stopped against the end surface of the first end of the cylinder 231 by the positioning boss 2341 to achieve the axial positioning of the guide pipe 234. The positioning boss 2341 is at least partially embedded in the positioning groove 251, so that the outer surface of the positioning boss 2341 abuts against the groove wall of the positioning groove 251 for limiting, and the guide pipe 234 can be coaxial with the cylinder 231. In particular, the connection member 250 may be a connection flange.

In an alternative embodiment, the positioning groove 251 may be disposed on the end surface of the first end of the cylinder 231, or the positioning groove 251 may be disposed on both the end surface of the first end of the cylinder 231 and the connecting member 250. For this reason, the present application does not limit the positioning groove 251 to be provided to the connection member 250.

In the above embodiment, the positioning and installation of the guide pipe 234 can be realized only by connecting the connecting member 250 with the cylinder 231, which not only improves the assembly precision of the guide pipe 234 and the cylinder 231, but also reduces the installation difficulty of the guide pipe 234.

Referring to fig. 11 to 13, the bellows 230 may further include a filter ring 235. A filter ring 235 is disposed at the second end of conduit 234. Specifically, filter ring 235 may be fixedly attached to the second end of conduit 234 by screws. Optionally, the outer diameter of the filter ring 235 is larger than the outer diameter of the conduit 234, the filter ring 235 is provided with a filter hole 2351, and the filter hole 2351 is communicated with the gap between the conduit 234 and the piston rod 232, so that the filter hole 2351 can be used for balancing the pressure in the gap between the conduit 234 and the piston rod 232, so as to avoid negative pressure or high pressure in the gap between the conduit 234 and the piston rod 232, and reduce the resistance of the expansion part 230 to extend or shorten. In addition, the filter ring 235 can prevent particles from entering the gap between the conduit 234 and the piston rod 232 in the well, so as to prevent the particles from affecting the sealing performance between the piston 233 and the conduit 234.

Referring to fig. 13, the first end of the filter hole 2351 is an end close to the gap between the guide pipe 234 and the piston rod 232, the second end of the filter hole 2351 is an end far from the gap between the guide pipe 234 and the piston rod 232, and the caliber of the first end of the filter hole 2351 is greater than that of the second end of the filter hole 2351.

In the above embodiment, the aperture of the first end of the filter hole 2351 is larger than the aperture of the second end of the filter hole 2351, so that the relatively large particles in the well can be prevented from entering the gap between the conduit 234 and the piston rod 232, and the particles in the gap between the conduit 234 and the piston rod 232 can be discharged conveniently.

In an alternative embodiment, the number of filter apertures 2351 is multiple, and the filter apertures 2351 are distributed about the axis of the filter ring 235 in the filter ring 235. Specifically, the filter apertures 2351 may be evenly distributed about the axis of the filter ring 235 to facilitate the discharge of particulate matter within the gap between the conduit 234 and the piston rod 232.

In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (14)

1. A under-pressure working machine is characterized in that the under-pressure working machine is used for lifting or lowering a pipe column (100), the under-pressure working machine comprises a sealing assembly (200) and a clamping mechanism (300),

the sealing assembly (200) is provided with a pipe column channel (240), the pipe column (100) can move along the pipe column channel (240), the clamping mechanism (300) is used for clamping the pipe column (100), and the clamping mechanism (300) can drive the pipe column (100) to be lifted or lowered from the first end of the pipe column channel (240);

a pipeline split-combination part (400) is arranged between the sealing component (200) and the clamping mechanism (300),

when the umbilical (110) is provided on the surface of the string (100), the umbilical (110) can be separated from or attached to the string (100) from the line junction/junction unit (400).

2. The band pressure working machine according to claim 1, wherein the clamping mechanism (300) comprises a first clamping assembly (310), a second clamping assembly (320) and a retainer,

the first clamping assembly (310) and the second clamping assembly (320) are arranged on the sealing assembly (200) along the axial direction of the pipe string passage (240), the second clamping assembly (320) is positioned on one side of the first clamping assembly (310) far away from the sealing assembly (200),

the first clamping assembly (310) and the second clamping assembly (320) are movable relative to the sealing assembly (200) along the axial direction of the string passage (240), the stopper is arranged on the second clamping assembly (320) and/or the sealing assembly (200), and the stopper is used for limiting the second clamping assembly (320) to move along the axial direction of the string passage (240).

3. The band pressure working machine according to claim 2, wherein the clamping mechanism (300) further comprises a first drive member (330) and a second drive member (340),

the first driving member (330) is connected with the first clamping assembly (310), and the first driving member (330) can drive the first clamping assembly (310) to move towards or away from the second clamping assembly (320) along the pipe string (100);

the second driving member (340) is connected with the second clamping assembly (320), and the second driving member (340) can drive the second clamping assembly (320) to move along the pipe string (100) to a direction far away from or close to the sealing assembly (200).

4. The band pressure working machine according to claim 3, wherein the clamping mechanism (300) further comprises a support bracket (350), the support bracket (350) is connected to the seal assembly (200), and the first driving member (330) and the second driving member (340) are disposed on the support bracket (350).

5. The pressurized working machine according to claim 2, characterized in that the sealing assembly (200) comprises a first blowout preventer (210), a second blowout preventer (220) and a telescopic part (230), the first blowout preventer (210) is arranged at a first end of the telescopic part (230), the second blowout preventer (220) is arranged at a second end of the telescopic part (230), the first clamping assembly (310) is connected with the first blowout preventer (210) and/or the first end of the telescopic part (230), and the first clamping assembly (310) can bring the telescopic part (230) to extend or shorten;

the second clamping assembly (320) and the second blowout preventer (220) are opened and the first blowout preventer (210) is closed under the condition that the first clamping assembly (310) is closed and drives the pipe string (100) to move;

with the first gripper assembly (310) open and moving relative to the tubular string (100), the first blowout preventer (210) is open, and the second gripper assembly (320) and the second blowout preventer (220) are closed.

6. The machine according to claim 5, wherein the manifold split (400) is provided with at least two connection columns (410), the connection columns (410) being spaced around the tubular string (100), and wherein a first end of the connection columns (410) is connected to the first clamping assembly (310) and a second end of the connection columns (410) is connected to the first blowout preventer (210).

7. The band pressure working machine according to claim 5, characterized in that the telescopic part (230) comprises a cylinder (231), a piston rod (232), a piston (233) and a duct (234), the duct (234) is arranged in the cylinder (231), and a first end of the duct (234) is connected with a first end of the cylinder (231);

the piston rod (232) and the piston (233) are located in the cylinder (231), the piston rod (232) and the piston (233) are sleeved on the guide pipe (234), the piston (233) is in sealing fit with the inner wall of the cylinder (231), the first end of the piston rod (232) is connected with the piston (233), the second end of the piston rod (232) is connected with the first blowout preventer (210) and/or the first clamping assembly (310), and the piston rod (232) can drive the piston (233) to slide along the cylinder (231).

8. The band pressure working machine according to claim 7, characterized in that the first end of the cylinder (231) is provided with a first balancing port (2311), the gap between the duct (234) and the cylinder (231) communicating with the first balancing port (2311);

the second end of the cylinder barrel (231) is provided with a second balance port (2312), and a gap between the piston rod (232) and the cylinder barrel (231) is communicated with the second balance port (2312).

9. The band pressure working machine according to claim 8, wherein the telescopic part (230) further comprises a pressurizing pipe and a pressure relief pipe, the pressurizing pipe is connected with the second balance port (2312) to add high pressure liquid or gas into the gap between the piston rod (232) and the cylinder (231) through the pressurizing pipe;

the pressure relief pipe is connected to the first equalizing port (2311) to discharge the liquid or gas in the gap between the pipe (234) and the cylinder (231) through the pressure relief pipe.

10. The band pressure working machine according to claim 9, characterized in that the piston (233) is provided with a first protrusion (2331) at a side close to the first end of the cylinder (231), the first end of the cylinder (231) is provided with a first groove (2313), and the first balance port (2311) is communicated with a side wall or a groove bottom of the first groove (2313); the first protrusion (2331) may be at least partially embedded in the first groove (2313) with the piston (233) moved to the first end of the cylinder (231); -the first protrusion (2331) is disengaged from the first groove (2313) in case the piston (233) is moved to the second end of the cylinder (231); and/or the presence of a gas in the gas,

a second protrusion (2332) is arranged on one side, close to the second end of the cylinder barrel (231), of the piston (233), a second groove (2314) is formed in the second end of the cylinder barrel (231), and the second balance port (2312) is located on the side wall or the groove bottom of the second groove (2314) and communicated with the groove bottom; the second protrusion (2332) may be at least partially inserted into the second groove (2314) in case the piston (233) is moved to the second end of the cylinder (231), and the second protrusion (2332) is separated from the second groove (2314) in case the piston (233) is moved to the first end of the cylinder (231).

11. The band pressure working machine according to claim 10, wherein the first protrusion (2331) is an annular protrusion and the first groove (2313) is an annular groove;

the second protrusion (2332) is an annular protrusion and the second groove (2314) is an annular groove.

12. The band pressure working machine according to claim 7, characterized in that the sealing assembly (200) further comprises a connecting piece (250), the connecting piece (250) is connected with the first end of the cylinder (231), the end of the connecting piece (250) connected with the cylinder (231) and/or the first end of the cylinder (231) is provided with a positioning groove (251),

one end of the guide pipe (234) connected with the cylinder barrel (231) is provided with a positioning boss (2341), at least part of the positioning boss (2341) is embedded in the positioning groove, and the outer surface of the positioning boss (2341) is abutted against the groove wall of the positioning groove (251) for limiting.

13. The band pressure working machine according to claim 7, characterized in that the telescopic part (230) further comprises a filter ring (235), the filter ring (235) being arranged at the second end of the duct (234), and the outer diameter of the filter ring (235) being larger than the outer diameter of the duct (234),

the filter ring (235) is provided with filter holes (2351), the filter holes (2351) being in communication with a gap between the conduit (234) and the piston rod (232).

14. The machine of claim 13, wherein the first end of the filter aperture (2351) is an end proximate to a gap between the conduit (234) and the piston rod (232), the second end of the filter aperture (2351) is an end distal from the gap between the conduit (234) and the piston rod (232), and the first end of the filter aperture (2351) has a larger caliber than the second end of the filter aperture (2351).

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