CN210370533U - Combined continuous oil pipe connector - Google Patents
Combined continuous oil pipe connector Download PDFInfo
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- CN210370533U CN210370533U CN201921334585.5U CN201921334585U CN210370533U CN 210370533 U CN210370533 U CN 210370533U CN 201921334585 U CN201921334585 U CN 201921334585U CN 210370533 U CN210370533 U CN 210370533U
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- coiled tubing
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Abstract
The utility model relates to a modular continuous oil pipe connector belongs to oil development instrument technical field in the pit. The device consists of a lower joint, a rivet locking pipe and a slip locking device; the combined type continuous oil pipe connector has the advantages that the lower joint is arranged at one end of the rivet locking pipe in a threaded mode, the slip locking device is arranged at the other end of the rivet locking pipe in a threaded mode, the combined type continuous oil pipe connector is firm in structure and convenient to disassemble, the connecting strength between the connector and a continuous oil pipe is effectively improved through the rivet locking pipe and the slip locking device, and meanwhile the combined type continuous oil pipe connector can bear the tension, compression and torsion effects; along with the use of big pipe diameter coiled tubing increases gradually, this connector can be applicable to the coiled tubing of great pipe diameter, and the joint strength of connector can effectively guarantee the security that oil pipe and downhole tool are connected, has solved the problem that current connector joint strength is low, is particularly useful for being used for deep well, ultra-deep well or drilling operation.
Description
Technical Field
The utility model relates to a modular continuous oil pipe connector belongs to oil development instrument technical field in the pit.
Background
In various underground operation projects such as well drilling, well completion, well logging, well workover and the like, the connector is an important component for connecting the coiled tubing and an operation tool; coiled tubing, whether used in drilling or downhole operations, requires the use of specialized connectors to connect the tools for further downhole operations.
The conventional continuous oil pipe connectors include the following: for the traditional outer slip connector, slips are stressed in a single direction, and under the repeated action of bidirectional load of a continuous oil pipe, the slips and the continuous oil pipe are easy to displace, so that sealing failure is caused, even the continuous oil pipe slips from the slip of the connector, and underground accidents are caused; when the ring pressing type connector is connected with the coiled tubing, the welding ribs inside the coiled tubing need to be removed, and the inside of the coiled tubing is polished so as to be sealed; the inner slip connector has low connection strength, small tool drift diameter and easy throttling, and can only be used in occasions with small load and no requirement on the operation drift diameter of the continuous oil pipe; the dimple connector is susceptible to deformation of the tubing outer diameter under high loads, causing seal failure, and improvements are needed.
Disclosure of Invention
The utility model aims to provide a: the combined type continuous oil pipe connector is firm in structure and convenient to disassemble, can simultaneously bear the effects of tension, compression and torsion, and solves the problem of low connection strength of the existing connector.
The technical scheme of the utility model is that:
a combined continuous oil pipe connector comprises a lower joint, a rivet locking pipe and a slip locking device; the method is characterized in that: and a lower joint is arranged at one end of the rivet locking pipe through threads, and a slip locking device is arranged at the other end of the rivet locking pipe through threads.
The inside of lower clutch be provided with the step through-hole.
Locking rivets are uniformly distributed on the circumference of the rivet locking pipe in a staggered manner.
The slip locking device comprises a slip cylinder, a spiral slip, a slip control ring and a locking sleeve, wherein a spiral groove is formed in the inner wall of the slip cylinder, and the spiral slip is arranged in the spiral groove; an inner boss is arranged on a port at one end of the slip cylinder, a slip control ring is arranged on the inner boss, the slip control ring is fixedly connected with the spiral slip through a pin, one end of the slip control ring extends to the outer side of the slip cylinder, and a locking sleeve is arranged on the slip control ring extending to the outer side of the slip cylinder in a threaded mode.
The inner bottom surface of the spiral groove is arranged in an inclined manner.
The inner wall of the spiral slip is provided with slip teeth, and the end head of one end of the spiral slip is provided with a pin joint handle.
The slips control ring be the ring form, be provided with the pin bayonet lock on the inner wall of slips control ring, be provided with a plurality of sealing washers on the inner wall of the slips control ring of pin bayonet lock one side.
The locking sleeve is annular, and an inner boss is arranged on the locking sleeve.
The utility model has the advantages that:
the combined type continuous oil pipe connector is firm in structure and convenient to disassemble, the connection strength between the connector and a continuous oil pipe is effectively improved through the rivet locking pipe and the slip locking device, and meanwhile, the combined type continuous oil pipe connector can bear the tension, compression and torsion functions; along with the use of big pipe diameter coiled tubing increases gradually, this connector can be applicable to the coiled tubing of great pipe diameter, and the joint strength of connector can effectively guarantee the security that oil pipe and downhole tool are connected, has solved the problem that current connector joint strength is low, is particularly useful for being used for deep well, ultra-deep well or drilling operation.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a three-dimensional structure of the spiral slip of the present invention;
FIG. 3 is a schematic view of a three-dimensional structure of a slip control ring according to the present invention;
FIG. 4 is a schematic top view of the structure of FIG. 3;
FIG. 5 is a schematic cross-sectional view taken along the line A-A in FIG. 4;
fig. 6 is a schematic structural view of the present invention connected to a coiled tubing.
In the figure: 1. the slip comprises a lower connector, 2, a rivet locking pipe, 3, a locking rivet, 4, a slip cylinder, 5, a spiral slip, 6, a slip control ring, 7, a locking sleeve, 8, a pin connecting handle, 9, slip teeth, 10, a sealing ring, 11, a pin clamping pin, 12, a pin, 13 and a continuous oil pipe.
Detailed Description
The combined continuous oil pipe connector consists of a lower joint 1, a rivet locking pipe 2 and a slip locking device; a lower joint 1 is arranged at one end of the rivet locking pipe 2 in a threaded manner, and a sealing ring 10 is arranged between the rivet locking pipe 2 and the lower joint 1; the inside of lower clutch 1 is provided with the step through-hole, and the effect of step through-hole is: when the coiled tubing 13 enters the rivet locking pipe 2, the step through hole of the lower joint 1 can limit the coiled tubing 13, and the coiled tubing 13 is prevented from being guided into the rivet locking pipe 2 to be out of place or excessively displaced.
Be dislocation form equipartition on the circumference of rivet locking pipe 2 and be provided with locking rivet 3, locking rivet 3's effect is: the coiled tubing 13 led into the rivet locking pipe 2 is tightly pressed and locked, so that the coiled tubing 13 can be fixed, and the coiled tubing 13 is prevented from sliding in the rivet locking pipe 2.
Slips locking device is installed to rivet locking pipe 2's other end screw thread, slips locking device comprises a slips section of thick bamboo 4, spiral slips 5, slips control ring 6 and lock sleeve 7, be provided with the helicla flute on the inner wall of a slips section of thick bamboo 4, the inner bottom of helicla flute is personally submitted the slope form and is set up, be provided with spiral slips 5 in the helicla flute, 5 outer walls of spiral slips are the tapered cooperation of helicla flute on wide sawtooth left-hand thread and the slips section of thick bamboo 4 inner wall, in operation, spiral slips 5 can be along the helicla flute screw in to slips section of thick bamboo 4 of a.
The thread surface on the outer wall of the spiral slip 5 is narrow relative to the spiral groove, when the spiral slip 5 works, the spiral slip 5 can axially slide along the inner bottom surface of the spiral groove, and the inner bottom surface of the spiral groove is obliquely arranged, so that when the spiral slip 5 slides to the highest point of the inner bottom surface of the spiral groove, the spiral slip 5 is inwards shrunk under the extrusion action of the spiral groove.
Be provided with pin joint handle 8 on the end of 5 one ends of spiral slips, be provided with slips 9 on the inner wall of spiral slips 5, the effect of slips 9 is increase frictional force, and in operation, when spiral slips 5 takes place inward shrink, slips 9 on the 5 inner walls of spiral slips receive a radial effort, slips 9 can form the chucking state to leading-in to the inside coiled tubing 13 of spiral slips 5 to this makes and is connected the fastening between spiral slips 5 and the coiled tubing 13.
An inner boss is arranged on a port at one end of the slip cylinder 4, a slip control ring 6 is arranged on the inner boss, the slip control ring 6 is in a ring shape, a pin bayonet lock 11 is arranged on the inner wall of the slip control ring 6, the pin bayonet lock 11 of the slip control ring 6 is connected with a pin connecting handle 8 on the spiral slip 5 in a matching mode, and a fixed state is formed through a pin 12.
The inner wall of the slip control ring 6 on one side of the pin bayonet 11 is provided with a plurality of sealing rings 10, and the sealing rings 10 play a role in sealing between the slip control ring 6 and the continuous oil pipe 13.
One end of the slip control ring 6 extends to the outer side of the slip cylinder 4, a locking sleeve 7 is arranged on the slip control ring 6 extending to the outer side of the slip cylinder 4 in a threaded mode, the locking sleeve 7 is in a circular ring shape, an inner boss is arranged on the locking sleeve 7, and when the slip control ring fixing device works, the locking sleeve 7 can limit the slip control ring 6 on the slip cylinder 4, so that the slip control ring 6 and the slip cylinder 4 are in a fixed state.
When the combined type continuous oil pipe connector is used for deep well, ultra-deep well or well drilling work, the continuous oil pipe 13 and a downhole tool can be quickly connected through the connector, and the specific operation flow of connection is as follows:
firstly, the rivet locking pipe 2 is respectively installed with the lower connector 1 and the slip cylinder 4 in a threaded mode, after installation is completed, the slip control ring 6 and the spiral slip 5 are fixed through the pin 12, and after fixation is completed, the spiral slip 5 with the slip control ring 6 is screwed into the slip cylinder 4 along the spiral groove in the inner wall of the slip cylinder 4.
After the spiral slips 5 are screwed in place, the coiled tubing 13 is led in from the port of the slip control ring 6, the coiled tubing 13 enters the interior of the spiral slips 5 through the slip control ring 6, the coiled tubing 13 is continuously led forwards, the coiled tubing 13 penetrates through the spiral slips 5 and the slip cylinder 4 and enters the rivet locking pipe 2 until the end head of the coiled tubing 13 is in contact with the step through hole of the lower connector 1, the coiled tubing 13 moves in place, and the coiled tubing 13 stops moving.
After the end of the continuous oil pipe 13 is moved in place, because the pin joint stem 8 on the spiral slips 5 and the pin bayonet lock 11 on the slips control ring 6 are fixedly connected through the pin 12, through applying an external force action, the slips control ring 6 is lifted outwards in the axial direction, the slips control ring 6 drives the spiral slips 5 to slide on the inner bottom surface of the spiral groove, because the inner bottom surface of the spiral groove is in an inclined shape, when the spiral slips 5 slide to the highest point of the inner bottom surface, the spiral slips 5 is inwards contracted by the extrusion of the spiral groove, at the moment, the slip teeth 9 on the inner wall of the spiral slips 5 are acted by a radial force, the slip teeth 9 clamp the continuous oil pipe 13, and the spiral slips 5 and the continuous oil pipe.
Behind 5 chucking coiled tubing 13 of spiral slips, screw up lock sleeve 7, lock sleeve 7 can make slips control ring 6 form spacingly on a slips section of thick bamboo 4 to make slips control ring 6 and a slips section of thick bamboo 4 form the stationary condition, form fixedly to spiral slips 5 from this, prevent that spiral slips 5 from taking place to rotate in a slips section of thick bamboo 4 on the one hand, on the other hand makes spiral slips 5 can not produce the removal under the effect of coiled tubing 13 two-way force.
After the spiral slips 5 and the continuous oil pipe 13 are fixed, the locking rivet 3 on the rivet locking pipe 2 is pressed, and the continuous oil pipe 13 is pressed through the locking rivet 3, so that a fixed state is formed between the rivet locking pipe 2 and the continuous oil pipe 13.
The lower joint 1 is connected to the work tool, i.e., the connection of the connector is completed.
The combined type continuous oil pipe connector is firm in structure and convenient to disassemble, the connection strength between the connector and a continuous oil pipe is effectively improved through the rivet locking pipe and the slip locking device, and meanwhile, the combined type continuous oil pipe connector can bear the tension, compression and torsion functions; along with the use of big pipe diameter coiled tubing increases gradually, this connector can be applicable to the coiled tubing of great pipe diameter, and the joint strength of connector can effectively guarantee the security that oil pipe and downhole tool are connected, has solved the problem that current connector joint strength is low, is particularly useful for being used for deep well, ultra-deep well or drilling operation.
Claims (8)
1. A combined continuous oil pipe connector comprises a lower joint (1), a rivet locking pipe (2) and a slip locking device; the method is characterized in that: a lower joint (1) is installed on one end thread of the rivet locking pipe (2), and a slip locking device is installed on the other end thread of the rivet locking pipe.
2. The modular coiled tubing connector of claim 1, wherein: the inner part of the lower joint (1) is provided with a step through hole.
3. The modular coiled tubing connector of claim 1, wherein: the circumference of the rivet locking pipe (2) is uniformly provided with locking rivets (3) in a staggered manner.
4. The modular coiled tubing connector of claim 1, wherein: the slip locking device comprises a slip cylinder (4), a spiral slip (5), a slip control ring (6) and a locking sleeve (7), wherein a spiral groove (13) is formed in the inner wall of the slip cylinder (4), and the spiral slip (5) is arranged in the spiral groove (13); an inner boss is arranged on a port at one end of the slip cylinder (4), a slip control ring (6) is arranged on the inner boss, the slip control ring (6) is fixedly connected with the spiral slip (5) through a pin (12), one end of the slip control ring (6) extends to the outer side of the slip cylinder (4), and a locking sleeve (7) is installed on the slip control ring (6) extending to the outer side of the slip cylinder (4) in a threaded mode.
5. The modular coiled tubing connector of claim 4, wherein: the inner bottom surface of the spiral groove (13) is arranged in an inclined shape.
6. The modular coiled tubing connector of claim 4, wherein: the inner wall of the spiral slip (5) is provided with slip teeth (9), and one end head of one end of the spiral slip (5) is provided with a pin joint handle (8).
7. The modular coiled tubing connector of claim 4, wherein: the slip control ring (6) is in a circular ring shape, a pin clamping pin (11) is arranged on the inner wall of the slip control ring (6), and a plurality of sealing rings (10) are arranged on the inner wall of the slip control ring (6) on one side of the pin clamping pin (11).
8. The modular coiled tubing connector of claim 4, wherein: the locking sleeve (7) is annular, and an inner boss is arranged on the locking sleeve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921334585.5U CN210370533U (en) | 2019-08-16 | 2019-08-16 | Combined continuous oil pipe connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921334585.5U CN210370533U (en) | 2019-08-16 | 2019-08-16 | Combined continuous oil pipe connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210370533U true CN210370533U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921334585.5U Active CN210370533U (en) | 2019-08-16 | 2019-08-16 | Combined continuous oil pipe connector |
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| Country | Link |
|---|---|
| CN (1) | CN210370533U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110424902A (en) * | 2019-08-16 | 2019-11-08 | 长江大学 | A kind of combined type coiled tubing connector |
-
2019
- 2019-08-16 CN CN201921334585.5U patent/CN210370533U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110424902A (en) * | 2019-08-16 | 2019-11-08 | 长江大学 | A kind of combined type coiled tubing connector |
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