CN108915611B - Continuous pipe rope connector and implementation method - Google Patents
Continuous pipe rope connector and implementation method Download PDFInfo
- Publication number
- CN108915611B CN108915611B CN201811003778.2A CN201811003778A CN108915611B CN 108915611 B CN108915611 B CN 108915611B CN 201811003778 A CN201811003778 A CN 201811003778A CN 108915611 B CN108915611 B CN 108915611B
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- wire rope
- steel wire
- section
- rope
- continuous pipe
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 195
- 239000010959 steel Substances 0.000 claims abstract description 195
- 238000002347 injection Methods 0.000 claims abstract description 40
- 239000007924 injection Substances 0.000 claims abstract description 40
- 230000000149 penetrating effect Effects 0.000 claims abstract description 18
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 6
- 241001330002 Bambuseae Species 0.000 claims abstract description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 6
- 239000011425 bamboo Substances 0.000 claims abstract description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 27
- 230000000670 limiting effect Effects 0.000 claims description 23
- 230000002265 prevention Effects 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 7
- 230000004323 axial length Effects 0.000 claims description 6
- 244000261422 Lysimachia clethroides Species 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 8
- 210000002445 nipple Anatomy 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241000309551 Arthraxon hispidus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011378 penetrating method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
Abstract
The invention provides a continuous pipe rope connector and an implementation method thereof, the continuous pipe rope connector comprises a center rod, wherein the outer wall of the center rod is sequentially provided with a conical section, a cylindrical section and a diameter-reducing section from top to bottom, a C-ring slip with a saw tooth protruding thorn on the outer surface is sleeved on the conical section, the cylindrical section is connected with a locking sleeve through a first thread, and the lower end of the diameter-reducing section is connected with a steel wire rope pressing cap through a universal joint; the wire rope presses cap by rope cap short circuit, wire rope cap and wire rope briquetting to constitute, the wire rope cap is hollow through body, and its inner chamber divide into straight section of thick bamboo and cone section, and the one end of rope cap short circuit is connected in universal joint, and the other end inserts in the straight section of thick bamboo through the second screw thread of outer wall, and the cone section embeds the wire rope briquetting, and the wire rope briquetting center is offered the through-hole, and the through-hole is used for chucking wire rope tip. According to the invention, before the steel wire rope reaches the limit tension, the connector cannot be separated from the steel wire rope or the continuous pipe, meanwhile, the continuous pipe can be ensured to smoothly pass through the injection head, the operation efficiency of the continuous pipe is improved, and the operation risk of the continuous pipe penetrating pipe is reduced.
Description
Technical Field
The invention belongs to the technical field of underground tools for petroleum exploitation, and particularly relates to a continuous pipe rope connector and an implementation method thereof.
Background
At present, in the operation of a continuous pipe related well completion, besides the operation of a speed pipe column, a support and installation device is provided through the movement of a tower, in the operation of other continuous pipes, an oil pipe is pulled by a crane, an operator cooperates with a traditional pipe penetrating mode of penetrating the oil pipe at the top of an injection head, and construction risks such as difficult control of the process, ascending operation, long operation time below the injection head and the like exist. In order to solve the problem, through research and practice of related technologies, it is considered that a hydraulic winch system can be adopted to provide oil pipe penetrating power, personnel operate on the ground, a steel wire rope drives a continuous pipe to enter a pipe penetrating method of an injection head, risks of high-place operation, hoisting operation and the like of a construction site can be reduced, but a ground pipe penetrating operation mode is adopted, one technical key is that the steel wire rope is reliably connected with the continuous pipe under the action of pulling force, and a special connector is required to be matched.
The existing conventional continuous pipe connectors mainly comprise an outer clamping tile type connector, a ring pressing type connector and a groove/pit type connector, wherein the connectors can be reliably connected with a continuous pipe, but cannot be connected with a steel wire rope, and are not provided with structures such as C-ring slips, universal joints and the like; in addition, the connection strength of the connector, the steel wire rope and the continuous pipe needs to ensure that the connector cannot be separated from the steel wire rope or the continuous pipe when the steel wire rope reaches the limit tension.
Disclosure of Invention
The invention aims at solving the problems that the existing connector can only be connected with a continuous pipe and cannot be connected with a steel wire rope; secondly, when the steel wire rope reaches the limit tension, the connector cannot be separated from the steel wire rope or the continuous pipe; and thirdly, when the continuous pipe is pulled to pass through the injection head, the operation times or duration of operators at the top or bottom of the injection head are reduced, and the construction risk is reduced.
The invention provides a continuous pipe rope connector which comprises a center rod, wherein the outer wall of the center rod is sequentially provided with a conical section, a cylindrical section and a diameter-reducing section from top to bottom, the cylindrical section is connected with one end with the small diameter of the conical section, a C-ring slip is sleeved on the conical section, a sawtooth protruding thorn is arranged on the outer surface of the C-ring slip, the cylindrical section is connected with a locking sleeve through a first thread, and the front end of the diameter-reducing section is connected with a steel wire rope pressing cap through a universal joint;
the steel wire rope pressing cap consists of a rope cap short circuit, a steel wire rope cap and a steel wire rope pressing block, wherein the steel wire rope cap is a hollow through body, an inner cavity of the steel wire rope pressing cap is divided into two parts, namely a straight barrel section and a conical barrel section, the large diameter end of the conical barrel section is connected with the straight barrel section, one end of the rope cap short circuit is connected with a universal joint, the other end of the rope cap short circuit is inserted into the straight barrel section through a second thread of the outer wall, the steel wire rope pressing block is arranged in the conical barrel section, a through hole is formed in the center of the steel wire rope pressing block, and the through hole is used for clamping the end part of the steel wire rope.
Further, the locking sleeve is provided with a limiting hole along the radial direction, the limiting hole penetrates through the wall thickness of the locking sleeve and the first thread, and a limiting stable nail is inserted into the limiting hole.
Further, the universal joint is formed by a universal ball head and a universal ball head short joint, the universal ball head is positioned between the rope cap short joint and the central rod, the end face of the rope cap short joint is abutted with the outer spherical surface of the universal ball head, the end face of the central rod is inserted into the inner concave surface of the universal ball head through the third thread of the outer wall, the inner wall of the front end of the universal ball head short joint is in threaded connection with the rope cap short joint, and the inner wall of the rear end of the universal ball head is provided with a ball groove for placing the universal ball head.
Further, the outer wall of wire rope briquetting is the toper with the awl section of thick bamboo assorted of wire rope cap, and the axial length of wire rope briquetting is less than awl section of thick bamboo axial length, and the through-hole at wire rope briquetting center is equipped with two sections, is major diameter hole section and minor diameter hole section respectively, major diameter hole section and rope cap short circuit next-door neighbour, and when compressing tightly wire rope, major diameter hole section is used for holding the aluminum alloy cover of pouring.
Further, the diameter of the locking sleeve at the position of the limiting hole is equal to the diameter of the continuous pipe to be connected.
Further, the end face of one end of the center rod where the conical section is located is provided with a chamfer.
Further, a method of implementing a coiled tubing string connector includes the steps of:
step one, assembling a coiled tubing string connector
S101: placing one end of the steel wire rope into a square shell, pouring aluminum alloy to form an aluminum alloy sleeve, and taking out the steel wire rope;
s102: loading the steel wire rope pressing block into the cone section of the steel wire rope cap, taking the steel wire rope to enable the free end of the steel wire rope to sequentially pass through the through hole of the steel wire rope pressing block and the cone section of the steel wire rope cap, and penetrating out of the steel wire rope cap until one end of the steel wire rope, which is poured with the aluminum alloy sleeve, is clamped in the large-diameter hole section of the steel wire rope pressing block;
s103: the steel wire rope cap, the rope cap short joint and the universal ball joint are connected through threads in sequence, so that one end of the rope cap short joint props against the aluminum alloy sleeve, and the other end of the rope cap short joint props against the universal ball joint;
s104: sleeving the locking sleeve on the central rod through a first thread, and sleeving the C-ring slip on the central rod to enable the C-ring slip to be in a free loose state;
s105: connecting the central rod with the universal ball head through a third thread to complete the assembly of the continuous pipe rope connector;
step two, connecting the continuous pipe and the continuous pipe rope connector
S201: inserting the C-ring slip end of the continuous pipe rope connector into the continuous pipe until the part, with the diameter smaller than the diameter of the continuous pipe, of the locking sleeve is fully inserted into the continuous pipe;
s202: the C-ring slips are opened by moving towards the large diameter position of the conical section of the central rod through the upward buckling thrust of the locking sleeve, and the saw tooth protruding thorns of the C-ring slips are meshed with the inner surface of the continuous pipe;
step three, a steel wire rope pulls a continuous pipe rope connector connected with the continuous pipe to enter an injection head from a gooseneck frame, then sequentially passes through the top of the injection head, the center of an injection head chain and an injection head bottom blowout prevention box, and is freely bent in a limited space between the injection head blowout prevention box and the injection head prying frame bottom, so that the steel wire rope belt continuous pipe smoothly passes through the blowout prevention box;
and step four, disassembling the connection of the steel wire rope, the continuous pipe and the continuous pipe rope connector.
Further, the wire rope and the continuous pipe rope connector are fixed twice, namely, the conical barrel section of the wire rope cap is matched with the conical outer wall of the wire rope pressing block, so that the wire rope pressing block moves forwards along the conical surface of the conical barrel section to a conical space between the conical barrel section and the wire rope pressing block under the action of tensile force of the wire rope, the wire rope is pressed, the wire rope pressing block moves towards the large-diameter hole section, the wire rope is pressed more tightly, and the primary fixation of the wire rope and the continuous pipe rope connector is completed;
if the primary fixing fails, the aluminum alloy sleeve is clamped at the step position between the large-diameter hole section and the small-diameter hole section of the steel wire rope pressing block, the tensile force of the steel wire rope is born, the steel wire rope is prevented from being separated from the continuous pipe rope connector, and the secondary fixing of the steel wire rope and the continuous pipe rope connector is completed.
Further, the connection of the wire rope, the coiled tubing and the coiled tubing connector in the fourth step comprises the following steps:
the limiting stable nail is disassembled, the stopping action of the locking sleeve relative to the central rod is relieved, the first thread is broken off, the central rod moves towards the rear end relative to the locking sleeve, the ring slip is separated from the large-diameter part of the conical section of the central rod, the slip is restored to the original state by virtue of the elasticity of the slip, and the separation of the continuous pipe rope connector and the continuous pipe is completed;
the second thread is tripped, the rope cap nipple is separated from the steel wire rope cap, and the steel wire rope sequentially passes through the steel wire rope pressing block and the conical section of the steel wire rope cap to be pulled out from the steel wire rope cap, so that the separation of the steel wire rope and the continuous pipe rope connector is completed.
The invention has the beneficial effects that: according to the continuous pipe rope connector and the implementation method, firstly, the size of the cone section of the steel wire rope cap, the size of the steel wire rope pressing block, the maximum outer diameter of the locking sleeve and the maximum outer diameter of the central rod can be determined according to the inner diameter of the continuous pipe and the outer diameter of the steel wire rope, so that the connection of the steel wire ropes with various sizes and the continuous pipes with various sizes can be realized; secondly, through the movement of the C-ring slip on the conical surface, the engagement or separation of the saw teeth of the C-ring slip and the inner wall of the continuous pipe can be realized, and then the anchoring or the dismounting of the connector and the continuous pipe can be realized; furthermore, the locking sleeve is provided with a limiting hole, and after the locking sleeve is arranged at a designated position, the locking sleeve can be fastened through a stable nail; thirdly, the secondary fixation of the steel wire rope and the connector is realized through the matching of the large-diameter hole at the upper part of the steel wire rope pressing block and the aluminum alloy sleeve; fourth, can make the connector pass and prevent spouting the box after the universal joint head of connector, buckle to arbitrary direction, the connector area continuous tube of being convenient for passes smoothly and pours into first and prevents spouting the box. Therefore, the invention can effectively guide the ground pipe penetrating construction of the on-site continuous pipe, improve the working efficiency of the continuous pipe and reduce the risk of the pipe penetrating operation of the continuous pipe.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of a continuous tube rope connector.
Fig. 2 is a schematic illustration of a method of connecting and securing a coiled tubing string connector.
Fig. 3 is a schematic view of a method of removing a coiled tubing string connector.
Reference numerals illustrate:
1. a central rod; c, ring slips; 3. a locking sleeve; 4. a limiting hole; 5. universal ball head; 6. the universal ball head is connected in short; 7. rope cap short circuit; 8. a wire rope cap; 9. a steel wire rope pressing block; 10. a continuous tube; 11. an aluminum alloy sleeve; 12. limiting and stabilizing nails; 13. a wire rope; A. a first thread; B. a second thread; C. a third thread;
101. a conical section; 102. a cylindrical section; 103. a reducing section;
801. a straight barrel section; 802. a cone section;
901. a large diameter bore section; 902. a small diameter bore section.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples.
In the present invention, the upper, lower, left and right directions in the drawing are regarded as the upper, lower, left and right directions of the continuous tube rope connector described in the present specification, the front end and the rear end are the front end and the rear end indicated in the drawing, specifically, one end of the tube rope connector connected with the wire rope is the front end, and one end of the continuous tube is the rear end.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
as shown in fig. 1, the invention provides a continuous pipe rope connector, which comprises a central rod 1, wherein the outer wall of the central rod 1 is sequentially provided with a conical section 101, a cylindrical section 102 and a diameter reduction section 103 from top to bottom, the cylindrical section 102 is connected with one end of the conical section 101 with a small diameter, a C-ring slip 2 is sleeved on the conical section 101, a saw tooth protruding thorn is arranged on the outer surface of the C-ring slip 2, the cylindrical section 102 is connected with a locking sleeve 3 through a first thread A, and the front end of the diameter reduction section 103 is connected with a steel wire rope pressing cap through a universal joint; (the front end is the direction marked in figures 1, 2 and 3, specifically, the end of the tube rope connector connected with the steel wire rope is the front end and the end connected with the continuous tube is the rear end)
The steel wire rope pressing cap consists of a rope cap short circuit 7, a steel wire rope cap 8 and a steel wire rope pressing block 9, wherein the steel wire rope cap 8 is a hollow through body, an inner cavity of the steel wire rope pressing cap is divided into two parts, namely a straight barrel section 801 and a conical barrel section 802, the large diameter end of the conical barrel section 802 is connected with the straight barrel section 801, one end of the rope cap short circuit 7 is connected to a universal joint, the other end of the rope cap short circuit is inserted into the straight barrel section 801 through a second thread B of the outer wall, the steel wire rope pressing block 9 is arranged in the conical barrel section 802, a through hole is formed in the center of the steel wire rope pressing block 9, and the through hole is used for clamping the end part of a steel wire rope 13.
The invention aims to solve the problem of bearing connection between the steel wire rope and the oil pipe in the ground pipe penetrating operation of the continuous pipe, ensure that the connector cannot be separated from the continuous pipe before the steel wire rope reaches the limit tension, and simultaneously ensure that the oil pipe smoothly passes through the injection head. Specifically, the working principle (working process) of the continuous tube rope connector provided in this embodiment is as follows:
firstly, sequentially loading a steel wire rope pressing block 9 into a cone section 802 of a steel wire rope cap 8, sequentially penetrating the steel wire rope pressing block 9 and the cone section 802 from the other end of a steel wire rope 13 with one end poured with an aluminum alloy sleeve 11, and penetrating out from the front end of the steel wire rope cap 8 until one end poured with the aluminum alloy sleeve 11 is clamped in a large-diameter hole at the upper part of the steel wire rope pressing block 9, as shown in fig. 2; so far, the steel wire rope 13 is connected with the continuous pipe rope connector through the cooperation of the cone section 802 and the steel wire rope pressing block 9;
secondly, the steel wire rope cap 8, the rope cap nipple 7 and the universal joint are sequentially connected through the second thread B, so that after all threads at two ends of the rope cap nipple 7 are threaded, the front end of the rope cap nipple 7 props against the aluminum alloy sleeve 11 in the large-diameter hole at the upper part of the steel wire rope press block sleeve 9, the limiting effect is achieved on the aluminum alloy sleeve 14, the spherical surface at the rear end of the rope cap nipple 7 props against the universal joint, and the free rotation of the universal joint on the spherical surface is not affected; so far, the secondary fixation of the steel wire rope 13 and the continuous pipe rope connector is completed through the matching of the large-diameter hole at the upper part of the steel wire rope pressing block sleeve 9, the aluminum alloy sleeve 11 and the steel wire rope pup joint 7;
then, the locking sleeve 3 is connected with the central rod 1 through the first thread A, and the first thread A is screwed on the C-ring slip 2 to be in a free loose state; the universal joint is connected with the central rod 1 connected with the locking sleeve 3 through threads; so far, the connector assembly is completed; inserting the connector into the continuous tube 10 from the rear end of the connector until the small diameter portion of the lock sleeve 3 is fully inserted into the continuous tube 10; the C-ring slips 2 are opened by moving towards the large diameter position of the conical surface of the central rod 1 through the thrust of the locking sleeve 3, and the saw teeth of the C-ring slips 2 are meshed with the inner surface of the continuous pipe, so that the connector is connected with the continuous pipe 10; to this end, the connection of the connector to the coiled tubing 10 is completed.
It should be specifically noted that, the front end and the rear end in the embodiment are described according to the reference sign of fig. 1. The central rod 1 consists of structures such as a chamfer, a conical surface, a first thread A and the like, and the maximum outer diameter is slightly smaller than the inner diameter of the continuous pipe; the C-ring slip 2 is provided with saw teeth protruding thorns on the outer surface, through openings are formed in the axial direction, a certain angle inclination angle is formed in the inner surface, the C-ring slip is matched with the conical surface of the central rod 1, the connector and the continuous pipe 10 are connected by moving towards the rear end on the conical surface, meanwhile, elastic deformation can occur, and the connector and the continuous pipe 10 can be separated by means of elastic retraction when the C-ring slip is not acted by thrust; the locking sleeve 3 is connected with the central rod 1 through a first thread A and matched with the C-ring slip 2 and the conical surface to realize engagement or separation of sawteeth of the C-ring slip 2 and the inner wall of the continuous pipe 10, specifically, the locking sleeve 3 pushes the C-ring slip 2 to move towards the rear end on the conical surface, the C-ring slip 2 is opened, the sawteeth are engaged with the inner wall of the continuous pipe 10, the central rod 1 moves towards the rear end through the first thread A, the C-ring slip 2 moves forwards relatively and is separated from the large diameter part of the conical surface of the central rod 1, the C-ring slip 2 is retracted by virtue of elasticity, and the sawteeth are separated from the inner wall of the continuous pipe 10 to realize the disassembly of the connector; the steel wire rope pressing cap consists of a steel wire rope cap 8, a steel wire rope pressing block 9 and a rope cap short circuit 7 and is used for realizing the connection between a steel wire rope 13 with an aluminum alloy sleeve 11 at one end and a connector.
The coiled tubing string connector of the present embodiment is not limited to connecting coiled tubing or wire ropes of a specific size, and the size of the cone section 802 of the wire rope cap 8, the size of the inner hole of the wire rope press block 9, the maximum outer diameter of the locking sleeve 3 and the maximum outer diameter of the center rod 1 can be determined according to the inner diameter of the coiled tubing 10 and the outer diameter of the wire rope 13, so as to realize connection of the wire rope 13 of various sizes with the coiled tubing 10 of various sizes.
The continuous pipe rope connector can be reliably connected with a continuous pipe, can be connected with a steel wire rope, can ensure that the continuous pipe rope connector cannot be separated from the steel wire rope or the continuous pipe when the steel wire rope reaches the limit tension, further can ensure that the steel wire rope pulls the continuous pipe to pass through an injection head smoothly, realizes the ground pipe penetrating operation of the continuous pipe, further realizes safe and efficient installation of the continuous pipe, reduces the ascending operation times of operators, reduces the operation time of the operators at the top and below the injection head, greatly reduces construction risks, and can also be used for technical researches of continuous pipe operation by technicians.
Example 2:
on the basis of the embodiment 1, the locking sleeve 3 is provided with a limiting hole 4 along the radial direction, the limiting hole 4 penetrates through the wall thickness of the locking sleeve 3 and the first thread A, and a limiting stable nail 12 is inserted into the limiting hole 4.
The locking sleeve 3 is prevented from being loosened in the connecting process by fastening the limiting stabilizing nails 12 in the limiting holes 4, and the C-ring slips 2 slip to the small diameter position of the conical surface of the central rod 1, so that the connection is failed; meanwhile, excessive buckling of the locking sleeve 3 is prevented, so that the C-ring slip 2 is prevented from being damaged due to excessive stress; to this end, the connection of the connector to the coiled tubing 10 is completed.
Example 3:
on the basis of embodiment 1, the universal joint comprises universal bulb 5 and universal bulb short circuit 6, and universal bulb 5 is located between rope cap short circuit 7 and the center pole 1, the terminal surface of rope cap short circuit 7 and the outer sphere butt of universal bulb 5, the terminal surface of center pole 1 inserts the interior concave surface of universal bulb 5 through the third screw thread C of outer wall, the front end inner wall and the rope cap short circuit 7 threaded connection of universal bulb short circuit 6, and the ball groove of placing universal bulb 5 is seted up to the rear end inner wall. (the front and rear ends are the directions marked in fig. 1, 2 and 3, specifically, the end of the tube connector connected with the steel wire rope is the front end, and the end connected with the continuous tube is the rear end).
Specifically, the universal joint is composed of a universal ball head 5 and a universal ball head short joint 6, threads are arranged in the universal ball head 5 and are connected with the central rod 1, so that the universal joint can rotate in all directions and can be bent for a certain angle, and the connector can conveniently pass through the injection head smoothly.
Example 4:
on the basis of embodiment 1, the outer wall of the steel wire rope pressing block 9 is conical matched with the conical section 802 of the steel wire rope cap 8, the axial length of the steel wire rope pressing block 9 is smaller than that of the conical section 802, a through hole in the center of the steel wire rope pressing block 9 is provided with two sections, namely a large-diameter hole section 901 and a small-diameter hole section 902, the large-diameter hole section 901 is closely adjacent to the rope cap short circuit 7, and the large-diameter hole section 901 is used for accommodating the poured aluminum alloy sleeve 11 when the steel wire rope 13 is pressed.
The tip of the tapered section 802 and the tip of the wire rope weight 9 form a tapered space, and the tapered space allows the wire rope weight 9 to advance along the tapered surface to the tapered space when the wire rope is pulled, and the difference in length between the axial lengths of the wire rope weight 9 and the tapered section 802 is used as the distance of the tapered space. (the front and rear ends are the directions marked in fig. 1, 2 and 3, specifically, the end of the tube connector connected with the steel wire rope is the front end, and the end connected with the continuous tube is the rear end).
When the continuous pipe rope connector is fixedly connected with a steel wire rope, the conical section 802 in the steel wire rope cap 8 is matched with the outer surface of the steel wire rope pressing block 9, so that when the tensile force of the steel wire rope 13 acts, the steel wire rope pressing block 9 moves towards the front end of the connector along the conical surface, the inner hole of the steel wire rope pressing block 9 becomes smaller to press the steel wire rope 13, the steel wire rope pressing block 9 moves downwards, the steel wire rope 13 is pressed tightly, and one-time fixation of the steel wire rope 13 and the connector is realized; under the condition of primary fixing failure, the aluminum alloy sleeve 11 is clamped at the step position between the large-diameter hole section 901 and the inner hole of the steel wire rope pressing block 9, the tensile force of the steel wire rope 13 is born, the steel wire rope 13 is prevented from being separated from the connector, and secondary fixing of the steel wire rope 13 and the connector is realized.
Example 5:
on the basis of the embodiment 2, in order to avoid the overlong clamping of the continuous pipe 10 on the C-ring slips 2, the diameter of the locking sleeve 3 where the limiting hole 4 is positioned is equal to the diameter of the continuous pipe 10 to be connected. Specifically, when the continuous tube 10 is threaded over the continuous tube string connector, the connector is inserted into the continuous tube 10 from the rear end of the connector until the small diameter portion of the lock sleeve 3 is fully inserted into the continuous tube 10.
Example 6:
in order to smoothly insert the continuous pipe 10 on the continuous pipe rope connector on the basis of the embodiment 1, the end surface of the end of the central rod 1 where the conical section 101 is located is provided with a chamfer.
Example 7:
a method of implementing a coiled tubing string connector comprising the steps of:
step one, assembling a coiled tubing string connector
S101: placing one end of the steel wire rope 13 in a square shell, pouring aluminum alloy to form an aluminum alloy sleeve 11, and taking out the steel wire rope 13;
s102: the steel wire rope pressing block 9 is arranged in the cone barrel section 802 of the steel wire rope cap 8, the free end of the steel wire rope 13 sequentially passes through the straight barrel section 801 of the steel wire rope cap 8, the through hole of the steel wire rope pressing block 9, the cone-shaped space formed between the front end of the cone barrel section 802 and the front end of the steel wire rope pressing block 9, and the steel wire rope pressing block is penetrated out of the steel wire rope cap 8 until one end of the steel wire rope 13, in which the aluminum alloy sleeve 11 is poured, is clamped in the large-diameter hole section 901 of the steel wire rope pressing block 9;
s103: the steel wire rope cap 8, the rope cap short joint 7 and the universal ball joint short joint 6 are connected through threads in sequence, so that one end of the rope cap short joint 7 props against the aluminum alloy sleeve 11, and the other end props against the universal ball joint 5;
s104: sleeving a locking sleeve 3 on the central rod 1 through a first thread A, and sleeving a C-ring slip 2 on the central rod 1, so that the C-ring slip 2 is in a free loose state;
s105: connecting the central rod 1 with the universal ball head 5 through a third thread C to complete the assembly of the continuous pipe rope connector;
step two, connecting the continuous pipe and the continuous pipe rope connector
S201: inserting the C-ring slip 2 end of the continuous pipe rope connector into the continuous pipe 10 until the part, with the diameter smaller than the diameter of the continuous pipe 10, of the locking sleeve 3 is fully inserted into the continuous pipe 10;
s202: the C-ring slips 2 are opened by moving towards the large diameter position of the conical section 101 of the central rod 1 through the buckling thrust of the locking sleeve 3, and the sawtooth spurs of the C-ring slips 2 are meshed with the inner surface of the continuous pipe 10;
step three, a steel wire rope 13 pulls a continuous pipe rope connector connected with the continuous pipe 10 to enter an injection head from a gooseneck frame, then sequentially passes through the top of the injection head, the center of an injection head chain and a blowout prevention box at the bottom of the injection head, and is freely bent in a limited space at the blowout prevention box of the injection head and the bottom of a prying frame of the injection head, so that the steel wire rope 13 with the continuous pipe 10 smoothly passes through the blowout prevention box;
and step four, disassembling the connection of the steel wire rope 13, the continuous pipe 10 and the continuous pipe rope connector. The step of disassembling the steel wire rope 13, the coiled tubing 10 and the coiled tubing rope connector in the step four comprises the following steps:
removing the limit stable nail 12, releasing the stopping action of the locking sleeve 3 relative to the central rod 1, disassembling the first thread A, moving the central rod 1 relative to the locking sleeve 3 towards the rear end, separating the C-ring slip 2 from the large-diameter part of the conical section 101 of the central rod 1, and recovering the C-ring slip 2 to be original by virtue of elasticity of the C-ring slip 2 to complete the separation of the continuous pipe rope connector and the continuous pipe 10;
the second thread B is tripped, the rope cap pup joint 7 is separated from the steel wire rope cap 8, and the steel wire rope 13 is sequentially pulled out from the steel wire rope cap 8 through the conical space between the front end of the conical barrel section 802 and the steel wire rope pressing block 9, the steel wire rope pressing block 9 and the straight barrel section 801, so that the separation of the steel wire rope 13 and the continuous pipe rope connector is completed.
Specifically, the steel wire rope 13 and the continuous pipe rope connector are fixed twice, namely the conical barrel section 802 of the steel wire rope cap 8 is matched with the conical outer wall of the steel wire rope pressing block 9, so that when the tensile force of the steel wire rope 13 acts, the steel wire rope pressing block 9 moves forward along the conical surface of the conical barrel section 802 to a conical space between the conical barrel section 802 and the steel wire rope pressing block 9 to press the steel wire rope 13, the steel wire rope pressing block 9 moves towards the front end of the conical space, and the steel wire rope 13 is pressed more tightly, so that one-time fixation of the steel wire rope 13 and the continuous pipe rope connector is completed;
if the primary fixing fails, the aluminum alloy sleeve 11 is clamped at the step position between the large-diameter hole section 901 and the small-diameter hole section 902 of the steel wire rope pressing block 9, the tensile force of the steel wire rope 13 is born, the steel wire rope 13 is prevented from being separated from the continuous pipe rope connector, and the secondary fixing of the steel wire rope 13 and the continuous pipe rope connector is completed.
In summary, the invention provides a pipe rope connector for connecting a steel wire rope penetrating a continuous pipe and the continuous pipe in the construction operation of penetrating the continuous pipe on the ground, so that in the process of penetrating the continuous pipe on the ground by adopting a winch system, the transition connection between the steel wire rope leading the continuous pipe into an injection head and the continuous pipe is realized, the anchoring strength of a connector slip in an oil pipe meets the tension load requirement of the steel wire rope leading the continuous pipe into the injection head, and meanwhile, the connector is enabled to reach the top of the injection head, smoothly enter the chain center of the injection head and then enter the blowout prevention box at the bottom of the injection head, and then freely bend in the limited space of the blowout prevention box at the injection head and the bottom of the injection head, so that the steel wire rope continuous pipe smoothly passes through the blowout prevention box. The invention solves the effective connection of the steel wire rope and the continuous pipe under the working condition of tensile load, ensures that the steel wire rope pulls the continuous pipe to smoothly enter the chain center of the injection head from the gooseneck frame and smoothly pass through the whole injection head, provides tool guarantee for the ground penetrating continuous pipe operation by adopting a winch system, further realizes safe and efficient installation of the continuous pipe, avoids the auxiliary continuous pipe penetrating construction step of the top of the injection head by operators and the like, and can finish the installation of the continuous pipe connector under the condition that the injection head is not matched with a crane; the number of ascending operation times of operators is reduced, the operation time of the operators at the top and below the injection head is reduced, and the construction risk is greatly reduced.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention. The components and structures not specifically described in this embodiment are well known in the art and are not described in detail herein.
Claims (7)
1. A continuous pipe string connector comprising a central rod (1), characterized in that: the outer wall of the center rod (1) is sequentially provided with a conical section (101), a cylindrical section (102) and a diameter reduction section (103) from top to bottom, the cylindrical section (102) is connected with one end of the conical section (101) with a small diameter, a C-ring slip (2) is sleeved on the conical section (101), a sawtooth protruding thorn is arranged on the outer surface of the C-ring slip (2), the cylindrical section (102) is connected with a locking sleeve (3) through a first thread (A), and the front end of the diameter reduction section (103) is connected with a steel wire rope pressing cap through a universal joint;
the locking sleeve (3) is provided with a limiting hole (4) along the radial direction, and a limiting stable nail (12) is inserted into the limiting hole (4);
the steel wire rope pressing cap consists of a rope cap short joint (7), a steel wire rope cap (8) and a steel wire rope pressing block (9), wherein the steel wire rope cap (8) is a hollow through body, the inner cavity of the steel wire rope cap is divided into two parts, namely a straight barrel section (801) and a conical barrel section (802), the large diameter end of the conical barrel section (802) is connected with the straight barrel section (801), one end of the rope cap short joint (7) is connected to a universal joint, the other end of the rope cap short joint is inserted into the straight barrel section (801) through a second thread (B) of the outer wall, the steel wire rope pressing block (9) is arranged in the conical barrel section (802), a through hole is formed in the center of the steel wire rope pressing block (9), and the through hole is used for clamping the end part of a steel wire rope (13);
the universal joint consists of a universal ball head (5) and a universal ball head short joint (6), the universal ball head (5) is positioned between a rope cap short joint (7) and a central rod (1), the end face of the rope cap short joint (7) is abutted with the outer spherical surface of the universal ball head (5), the end face of the central rod (1) is inserted into the inner concave surface of the universal ball head (5) through a third thread (C) of the outer wall, the inner wall of the front end of the universal ball head short joint (6) is in threaded connection with the rope cap short joint (7), and the inner wall of the rear end of the universal ball head is provided with a spherical groove for placing the universal ball head (5);
the outer wall of wire rope briquetting (9) is the toper with the awl section of thick bamboo (802) of wire rope cap (8) assorted, and the axial length of wire rope briquetting (9) is less than awl section of thick bamboo (802) axial length, and the through-hole at wire rope briquetting (9) center is equipped with two sections, is major diameter hole section (901) and minor diameter hole section (902) respectively, major diameter hole section (901) are closely adjacent with rope cap short circuit (7), and when compressing tightly wire rope (13), major diameter hole section (901) are used for holding aluminium alloy cover (11) of pouring.
2. The coiled tubing string connector as defined in claim 1, wherein: the limiting hole (4) penetrates through the wall thickness of the locking sleeve (3) and the first thread (A).
3. The coiled tubing string connector as defined in claim 2 wherein: the diameter of the locking sleeve (3) where the limiting hole (4) is located is equal to the diameter of the continuous pipe (10) to be connected.
4. The coiled tubing string connector as defined in claim 1, wherein: the end face of one end of the center rod (1) where the conical section (101) is located is provided with a chamfer.
5. A method of implementing a continuous tube line connector as claimed in any one of claims 1 to 4, comprising the steps of:
step one, assembling a coiled tubing string connector
S101: placing one end of a steel wire rope (13) in a square shell, pouring aluminum alloy to form an aluminum alloy sleeve (11), and taking out the steel wire rope (13);
s102: loading a steel wire rope press block (9) into a conical section (802) of a steel wire rope cap (8), taking a steel wire rope (13) to enable the free end of the steel wire rope to sequentially pass through a straight section (801) of the steel wire rope cap (8), a through hole of the steel wire rope press block (9), and a conical space formed between the front end of the conical section (802) and the front end of the steel wire rope press block (9), and penetrating out of the steel wire rope cap (8) until one end of the steel wire rope (13) with an aluminum alloy sleeve (11) is clamped in a large-diameter hole section (901) of the steel wire rope press block (9);
s103: the steel wire rope cap (8), the rope cap short joint (7) and the universal ball joint (6) are connected through threads in sequence, so that one end of the rope cap short joint (7) is propped against the aluminum alloy sleeve (11), and the other end is propped against the universal ball joint (5);
s104: sleeving the locking sleeve (3) on the central rod (1) through a first thread (A), and sleeving the C-ring slip (2) on the central rod (1) to enable the C-ring slip (2) to be in a free loosening state;
s105: connecting the central rod (1) with the universal ball head (5) through a third thread (C) to complete the assembly of the continuous pipe rope connector;
step two, connecting the continuous pipe and the continuous pipe rope connector
S201: inserting the C-ring slip (2) end of the continuous pipe rope connector into the continuous pipe (10) until the part of the locking sleeve (3) with the diameter smaller than the diameter of the continuous pipe (10) is fully inserted into the continuous pipe (10);
s202: the C-ring slips (2) are opened by moving towards the large-diameter position of the conical section (101) of the central rod (1) through the buckling thrust of the locking sleeve (3), and the sawtooth spurs of the C-ring slips (2) are meshed with the inner surface of the continuous pipe (10);
step three, a steel wire rope (13) pulls a continuous pipe rope connector connected with a continuous pipe (10) to enter an injection head from a gooseneck frame, then sequentially passes through the top of the injection head, the chain center of the injection head and an injection head bottom blowout prevention box, and is freely bent in a limited space at the injection head blowout prevention box and the injection head pry frame bottom, so that the steel wire rope (13) with the continuous pipe (10) smoothly passes through the blowout prevention box;
and step four, disassembling the connection of the steel wire rope (13), the continuous pipe (10) and the continuous pipe rope connector.
6. The method for implementing the continuous tube rope connector according to claim 5, wherein the steel wire rope (13) and the continuous tube rope connector are fixed twice, namely, the conical barrel section (802) of the steel wire rope cap (8) is matched with the conical outer wall of the steel wire rope pressing block (9), so that when the steel wire rope (13) is acted by tension force, the steel wire rope pressing block (9) moves forward along the conical surface of the conical barrel section (802) to a conical space between the conical barrel section (802) and the steel wire rope pressing block (9), the steel wire rope (13) is pressed, the steel wire rope pressing block (9) moves towards the front end of the conical space, and the steel wire rope (13) is pressed tightly, so that one-time fixation of the steel wire rope (13) and the continuous tube rope connector is completed;
if the primary fixing fails, the aluminum alloy sleeve (11) is clamped at the step position between the large-diameter hole section (901) and the small-diameter hole section (902) of the steel wire rope pressing block (9), the tensile force of the steel wire rope (13) is born, the steel wire rope (13) is prevented from being separated from the continuous pipe rope connector, and the secondary fixing of the steel wire rope (13) and the continuous pipe rope connector is completed.
7. The method of implementing a coiled tubing string connector according to claim 5, wherein the step of removing the wire rope (13), the coiled tubing (10), and the coiled tubing string connector in step four comprises:
removing a limit stabilizing nail (12), relieving the retaining effect of the locking sleeve (3) relative to the central rod (1), unbuckling the first thread (A), enabling the central rod (1) to move towards the rear end relative to the locking sleeve (3), separating the C-ring slip (2) from the large-diameter part of the conical section (101) of the central rod (1), and recovering the C-ring slip (2) to be original by virtue of self elasticity to finish the separation of the continuous pipe rope connector and the continuous pipe (10);
the second thread (B) is tripped, the rope cap short circuit (7) is separated from the steel wire rope cap (8), and the steel wire rope (13) sequentially passes through a conical space between the front end of the conical section (802) and the steel wire rope pressing block (9), the steel wire rope pressing block (9) and the straight section (801) to be pulled out from the steel wire rope cap (8), so that the steel wire rope (13) is separated from the continuous pipe rope connector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811003778.2A CN108915611B (en) | 2018-08-30 | 2018-08-30 | Continuous pipe rope connector and implementation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811003778.2A CN108915611B (en) | 2018-08-30 | 2018-08-30 | Continuous pipe rope connector and implementation method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201301683Y (en) * | 2008-11-26 | 2009-09-02 | 大庆油田有限责任公司 | Tubing plug for preventing oil well or water well from blowout |
| CN102182409A (en) * | 2011-04-28 | 2011-09-14 | 中国石油天然气集团公司 | Continuous tube guiding device |
| CN102619484A (en) * | 2012-04-11 | 2012-08-01 | 中国石油集团川庆钻探工程有限公司钻采工程技术研究院 | Well wall coring while drilling tool |
| CN208594873U (en) * | 2018-08-30 | 2019-03-12 | 中国石油集团川庆钻探工程有限公司 | A kind of continuous pipe pipe rope connection |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT327845B (en) * | 1972-10-16 | 1976-02-25 | Sumitomo Metal Mining Co | DRILLING DEVICE |
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2018
- 2018-08-30 CN CN201811003778.2A patent/CN108915611B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201301683Y (en) * | 2008-11-26 | 2009-09-02 | 大庆油田有限责任公司 | Tubing plug for preventing oil well or water well from blowout |
| CN102182409A (en) * | 2011-04-28 | 2011-09-14 | 中国石油天然气集团公司 | Continuous tube guiding device |
| CN102619484A (en) * | 2012-04-11 | 2012-08-01 | 中国石油集团川庆钻探工程有限公司钻采工程技术研究院 | Well wall coring while drilling tool |
| CN208594873U (en) * | 2018-08-30 | 2019-03-12 | 中国石油集团川庆钻探工程有限公司 | A kind of continuous pipe pipe rope connection |
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