CN219034642U - Composite connector - Google Patents

Abstract

The utility model relates to the technical field of continuous oil pipes and discloses a composite connector which comprises a structural component, slips and jackscrews, wherein the slips are arranged on the inner side of the structural component, the jackscrews are connected to the side wall of the structural component through threads, and the connected continuous oil pipe is inserted into the structural component and is fixed through the slips and the jackscrews; the number of the slips is two, namely an upper slip and a lower slip; the structure assembly further comprises a pressing sleeve, a connecting main body and a lower joint, wherein the pressing sleeve is connected with the upper end of the connecting main body through threads, the upper slips are limited between the pressing sleeve and the connecting main body, the lower joint is connected with the lower end of the connecting main body through threads, and the lower slips are limited between the lower joint and the connecting main body. The utility model is provided with the upper slip and the lower slip, and the two slips are provided with the anti-slip teeth with different inclinations, and meanwhile, the arrangement mode of jackscrews is optimized, so that the torque bearing capacity of the continuous oil pipe connector is greatly improved.

Description

Composite connector

Technical Field

The utility model relates to the technical field of continuous oil pipes, in particular to a composite connector.

Background

The coiled tubing is a tubing made of low-carbon alloy steel, has good flexibility, is also called a flexible tubing, and has a length of several kilometers. The continuous oil pipe operation equipment has the characteristics of pressurized operation and continuous running, is small in size, quick in operation period and low in cost, and plays an increasingly important role in oil and gas field exploration and development.

When coiled tubing is used, it is often necessary to use a special connector to connect the coiled tubing to conventional tubing, drill pipe, or other equipment. In the existing connector special for the coiled tubing, the end part of the coiled tubing is fixed on the connector through slips and a group of jackscrews which are arranged along the circumference, the torque bearing capacity is poor, and the application range of the coiled tubing technology is limited. Therefore, there is a need to design a coiled tubing connector that is more torque tolerant.

Disclosure of Invention

The present utility model improves the torque resistance of existing coiled tubing connectors by optimizing the existing coiled tubing connectors.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a composite connector comprises a structural component, slips and jackscrews, wherein the slips are installed on the inner side of the structural component, the jackscrews are connected to the side wall of the structural component through threads, and connected coiled tubing is inserted into the structural component and fixed through the slips and the jackscrews;

the number of the slips is two, namely an upper slip and a lower slip; oblique anti-slip teeth are processed on the inner walls of the upper slip and the lower slip, and the oblique directions of the anti-slip teeth on the upper slip and the lower slip are opposite;

the structure assembly further comprises a pressing sleeve, a connecting main body and a lower joint, wherein the pressing sleeve is connected with the upper end of the connecting main body through threads, the upper slips are limited between the pressing sleeve and the connecting main body, the lower joint is connected with the lower end of the connecting main body through threads, and the lower slips are limited between the lower joint and the connecting main body.

As a preferable scheme, the anti-slip teeth on the upper slip incline leftwards, and the anti-slip teeth on the lower slip incline rightwards.

Preferably, the inclination angle of the anti-slip teeth is 45 degrees.

As a preferable scheme, an annular space is arranged between the connecting main body and the connected coiled tubing, a sliding sleeve is arranged in the annular space, the outer side of the sliding sleeve is connected with the inner wall of the connecting main body through a spline, and the lower slip is wedged between the sliding sleeve and the coiled tubing from the lower end of the sliding sleeve;

and a sealing element is arranged in the annular space and clamped between the upper end face of the sliding sleeve and the connecting main body.

Preferably, the sealing member is a rubber ring.

Preferably, the sealing element is a component and comprises a group of O-shaped sealing rings which are axially arranged, and a hard spacer ring is arranged between two adjacent sealing rings.

Preferably, the hard spacer ring has a structure of polytetrafluoroethylene.

As a preferable scheme, a plurality of axial slots are processed on the upper slip and the lower slip, and the axial slots are uniformly distributed along the circumference;

preferably, the axial slits are divided into two types, namely an upward slit and a downward slit, and the upward slit and the downward slit are alternately arranged.

The jackscrews are at least two groups, and each group of jackscrews is arranged along the axis of the connecting main body;

each group of jackscrews at least comprises two jackscrews, and all jackscrews in each group are uniformly arranged along the circumference of the connecting main body;

and certain two jackscrews corresponding to each other in the two adjacent jackscrews are arranged in a staggered manner, and the staggered directions and angles are the same.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model is provided with the upper slip and the lower slip, and the two slips are provided with the anti-slip teeth with different inclinations, and meanwhile, the arrangement mode of jackscrews is optimized, so that the torque bearing capacity of the continuous oil pipe connector is greatly improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present utility model.

Fig. 2 is a partial enlarged view at a in fig. 1.

Fig. 3 is a schematic structural view of another embodiment at the seal.

Fig. 4 is a plan deployment view of the upper slips.

Fig. 5 is a view showing the arrangement of the jackscrews on the outer surface of the connecting body.

Reference numerals in the drawings: 1. a coiled tubing; 2. pressing the sleeve; 3. an upper slip; 4. a jackscrew; 5. a connecting body; 6. a rubber ring; 7. a sliding sleeve; 8. a lower slip; 9. a lower joint; 10. an O-shaped sealing ring; 11. a spacer ring; 12. cutting downwards; 13. upward slotting; 14. anti-slip teeth.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiment one:

as shown in fig. 1, the present embodiment includes a structural component, a slip and a jackscrew 4, the slip is installed on the inner side of the structural component, the jackscrew 4 is connected on the side wall of the structural component through threads, the connected coiled tubing 1 is inserted in the structural component, a conical mating surface is arranged between the slip and the structural component, the slip is tightened inwards under the action of the conical mating surface and is clamped on the outer wall of the coiled tubing 1, so that the coiled tubing 1 is clamped, and the tip of the jackscrew 4 is propped against the outer wall of the coiled tubing 1, so that the coiled tubing 1 can transmit torque. The above is a conventional structure used in the prior art, and will not be described here again.

As shown in fig. 1, the structural assembly further comprises a pressing sleeve 2, a connecting body 5 and a lower joint 9, wherein the pressing sleeve 2 is connected with the upper end of the connecting body 5 through threads, the upper slips 3 are limited between the pressing sleeve 2 and the connecting body 5, the lower joint 9 is connected with the lower end of the connecting body 5 through threads, and the lower slips 8 are limited between the lower joint 9 and the connecting body 5.

As shown in fig. 1, in the utility model, two slips are respectively called an upper slip 3 and a lower slip 8, and oblique anti-slip teeth 14 are processed on the inner walls of the upper slip 3 and the lower slip 8, so that the upper slip and the lower slip can limit the relative rotation between the continuous oil pipe 1 and the connecting main body 5 from two directions of the axial direction and the circumferential direction, thereby improving the capacity of transmitting torque of the connector of the continuous oil pipe 1 and bearing tensile load.

In addition, the inclination directions of the anti-slip teeth 14 on the upper slip 3 and the lower slip 8 are opposite, so that the connector of the continuous oil pipe 1 cannot relatively shift with the continuous oil pipe 1 along the trend of the anti-slip teeth 14 when transmitting torque, and the torque transmitting capacity of the connector of the continuous oil pipe 1 can be exerted to the greatest extent. In practice, the inclination angle of the anti-slip teeth 14 is 45 degrees, so that the ability of the coiled tubing 1 connector to bear tensile load and the ability to transmit torque are balanced.

In specific implementation, the anti-slip teeth 14 on the upper slip 3 incline leftwards, and when the relative rotation trend exists between the continuous oil pipe 1 and the upper slip 3, the leftward inclination can ensure that the thread between the pressing sleeve 2 and the connecting main body 5 can not be unscrewed.

As shown in fig. 1 and 2, an annular space is provided between the connecting body 5 and the connected coiled tubing 1, a sliding sleeve 7 is provided in the annular space, the outer side of the sliding sleeve 7 is connected with the inner wall of the connecting body 5 through a spline, and the lower slips 8 are wedged between the sliding sleeve 7 and the coiled tubing 1 from the lower end of the sliding sleeve 7. A sealing element is arranged in the annular space and clamped between the upper end face of the sliding sleeve 7 and the connecting main body 5. In the above-mentioned structure, the purpose of setting up sliding sleeve 7 is to utilize the cantilever weight of coiled tubing 1 lower extreme, compresses the lower terminal surface of sealing member through sliding sleeve 7, compares with the simple O type sealing washer 10 that adopts in the prior art, and the requirement to the surface quality of coiled tubing 1 reduces by a wide margin, even the surface wear of coiled tubing 1 still can guarantee the seal to improve the leakproofness between connecting body 5 and the coiled tubing 1.

In this embodiment, the seal is a rubber ring 6.

As shown in fig. 4, the upper slip 3 and the lower slip 8 are both provided with a plurality of axial slits, and each axial slit is uniformly distributed along the circumference. The axial slits are divided into two types, called upward slits 13 and downward slits 12, and the upward slits 13 and the downward slits 12 are alternately arranged. Through the design axial slit to inject the arrangement mode of axial slit, can make two upper and lower slips to the clamping force that coiled tubing 1 applyed more even, it is better to press from both sides tight effect, and the ability of transmission moment of torsion is also stronger.

As shown in fig. 5, the present utility model defines the arrangement of the jackscrews 4: at least two groups of jackscrews 4 are arranged, and each group of jackscrews 4 is arranged along the axis of the connecting main body 5; each group of jackscrews 4 comprises at least two jackscrews 4, and the jackscrews 4 in each group are uniformly arranged along the circumference of the connecting main body 5; certain two jackscrews 4 corresponding up and down in two adjacent jackscrews 4 are arranged in a staggered way, and the staggered directions and angles are the same. By the limitation, the jackscrews 4 are uniformly arranged in the circumferential direction and regularly staggered in the axial direction, so that the torque transmission capacity is enhanced, and the torque transmission capacity of the connector of the continuous oil pipe 1 can be increased to the greatest extent under the condition that the continuous oil pipe 1 is not crushed by adjusting the stress points of the continuous oil pipe 1 through the arrangement mode of the jackscrews 4.

Embodiment two:

the present embodiment differs from the first embodiment in the structure of the seal member.

In this embodiment, as shown in fig. 3, the sealing member is a component, and includes a group of O-rings 10 arranged along the axial direction, and a hard spacer ring 11 is disposed between two adjacent sealing rings. After the whole sealing member is compressed, the combination of the spacer ring 11 and the O-shaped sealing ring 10 can form multiple effective sealing, and the sealing performance is further improved.

In specific implementation, the hard spacer ring 11 has a structure of polytetrafluoroethylene.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a compound connector, includes structural component, slips and jackscrew (4), and the inboard at structural component is installed to the slips, and jackscrew (4) pass through threaded connection on structural component's lateral wall, are inserted in structural component by connecting coiled tubing (1) to fixed its characterized in that through slips and jackscrew (4):

the number of the slips is two, namely an upper slip (3) and a lower slip (8); oblique anti-slip teeth (14) are processed on the inner walls of the upper slip (3) and the lower slip (8), and the oblique directions of the anti-slip teeth (14) on the upper slip (3) and the lower slip (8) are opposite;

the structure assembly further comprises a pressing sleeve (2), a connecting main body (5) and a lower joint (9), wherein the pressing sleeve (2) is connected with the upper end of the connecting main body (5) through threads, the upper slips (3) are limited between the pressing sleeve (2) and the connecting main body (5), the lower joint (9) is connected with the lower end of the connecting main body (5) through threads, and the lower slips (8) are limited between the lower joint (9) and the connecting main body (5).

2. A composite connector according to claim 1, wherein: anti-slip teeth (14) on the upper slip (3) incline leftwards, and anti-slip teeth (14) on the lower slip (8) incline rightwards.

3. A composite connector according to claim 1, wherein: the inclination angle of the anti-slip teeth (14) is 45 degrees.

4. A composite connector according to claim 1, wherein: an annular space is arranged between the connecting main body (5) and the connected coiled tubing (1), a sliding sleeve (7) is arranged in the annular space, the outer side of the sliding sleeve (7) is connected with the inner wall of the connecting main body (5) through a spline, and the lower slips (8) are wedged between the sliding sleeve (7) and the coiled tubing (1) from the lower end of the sliding sleeve (7);

and a sealing element is arranged in the annular space and clamped between the upper end face of the sliding sleeve (7) and the connecting main body (5).

5. A composite connector according to claim 4, wherein: the seal is a rubber ring (6).

6. A composite connector according to claim 4, wherein: the sealing element is an assembly and comprises a group of O-shaped sealing rings (10) which are axially arranged, and a hard spacer ring (11) is arranged between two adjacent sealing rings.

7. A composite connector according to claim 6, wherein: the hard spacer ring (11) is made of polytetrafluoroethylene.

8. A composite connector according to any one of claims 1-7, wherein: a plurality of axial slots are processed on the upper slip (3) and the lower slip (8), and the axial slots are uniformly distributed along the circumference;

the axial slits are divided into two types, namely an upward slit (13) and a downward slit (12), and the upward slit (13) and the downward slit (12) are alternately arranged.

9. A composite connector according to any one of claims 1-7, wherein: the jackscrews (4) are at least two groups, and the jackscrews (4) of each group are arranged along the axis of the connecting main body (5);

each group of jackscrews (4) at least comprises two jackscrews (4), and all jackscrews (4) in each group are uniformly arranged along the circumference of the connecting main body (5);

certain two jackscrews (4) corresponding to each other in the two adjacent jackscrews (4) are arranged in a staggered way, and the staggered directions and angles are the same.

Images