Static sealing device of multi-core suspension cable for coiled tubing operation

Abstract

The utility model discloses a multi-core suspension cable static sealing device for coiled tubing operation, which comprises a lower joint and a connecting joint which are sequentially connected in a sealing way, and through holes for a cable to pass through are arranged in the connecting joint and the connecting joint; a suspension mechanism is suspended on the lower joint; a hanging mechanism used for clamping and stripping a cable is arranged in the connecting joint, an upper joint is installed on the top of the connecting joint, a plurality of sealing holes are formed in the upper joint, and a cable core of the stripped cable penetrates out in a sealed mode through a sealing mechanism in the sealing holes. As the suspension mechanism is designed to lock the cable and the sealing mechanism is designed to seal and output, the upper part of the cable is statically sealed, and the lower part is suspended, so that the cable is suspended, fixed and sealed, and the problem of annular sealing between the cable at the tail end of the coiled tubing roller and the coiled tubing is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous tubing operation in oil and gas fields, in particular to a multi-core suspension cable static sealing device for continuous tubing operation. Background Art

[0002] When operating in oil and gas fields, the coiled tubing transmission logging has high timeliness, high success rate and good data quality, so it is suitable for the construction of high-angle wells and complex wells. With the further development of oil fields, the number of water injection wells is increasing. During the long-term water injection process, the conventional oil pipes and intelligent measuring and adjusting injectors will cause wall scaling and waxing in the water injection wells, which will cause the oil pipes to encounter obstructions, seriously affecting the demand for fine stratified water injection in the oil field, and the subsequent matching measuring and adjusting fees will also increase accordingly. In order to further improve the stratified fine water injection work and seek new water injection methods, the coiled tubing is used to replace the traditional oil pipe, getting rid of the cable and injector construction process under the traditional method. The coiled tubing integrates the cable inside the coiled tubing to realize the remote control of the intelligent measuring and adjusting injector for the dynamic stratified water injection in the downhole. However, in this process, it is necessary to seal the end of the coiled tubing and the internal cable. The internal parts of the current coiled tubing cable sealing head have high replacement costs, complex structures, complex and difficult installation and maintenance procedures, low reliability of the sealing mechanism, short reserved cable cores, and cannot be used multiple times, which is not convenient for logging operations. Utility Model Content

[0003] In view of the above defects or shortcomings, the purpose of the utility model is to provide a multi-core suspension cable static sealing device for continuous oil pipe operations.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A static sealing device for a multi-core suspended cable for continuous tubing operations comprises: a lower joint and a connecting joint which are sealed and connected in sequence, wherein the connecting joint and the connecting joint are provided with through holes for the cable to pass through; a hanging mechanism is hung on the lower joint; a hanging mechanism for clamping a stripped cable is provided in the connecting joint, an upper joint is installed on the top of the connecting joint, a plurality of sealing holes are provided on the upper joint, and the stripped cable core passes through the sealing mechanism in the sealing hole through the sealing seal.

[0006] The suspension mechanism comprises: a ferrule seat, a wire ring sleeve, and a ferrule which are sleeved on the cable;

[0007] The wire ring sleeve is clamped on the bottom of the ferrule seat. After the cable above the wire ring sleeve is stripped inside and outside, a stripped cable is formed. The outer layer cable of the stripped cable is clamped on the ferrule seat. The inner layer cable of the stripped cable passes through the ferrule and is bent and evenly distributed above the ferrule.

[0008] A pressure pad is installed on the ferrule.

[0009] The upper joint is sealed and installed on the top of the connecting joint. The sealing mechanism includes: a sealing packing and a pressure cap installed in the sealing hole. The cable core passes through the sealing packing and the pressure cap for output.

[0010] A copper gasket is also arranged between the sealing packing and the pressure cap.

[0011] A union nut is installed outside the connecting joint.

[0012] A second O-ring and a Parker retaining ring are installed between the connecting joint and the upper joint.

[0013] A first O-ring and a Parker retaining ring are installed between the lower joint and the connecting joint.

[0014] A cable support sleeve is installed on the inlet of the lower joint.

[0015] A hammer union nut is installed on the lower joint.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model provides a multi-core suspended cable static sealing device for continuous oil pipe operation. Due to the design of a suspension mechanism to lock the cable and a sealing mechanism to seal the output, the upper part of the cable can be statically sealed and the lower part can be suspended, thereby realizing cable suspension, fixation and sealing, and solving the problem of sealing the cable and the continuous oil pipe annulus at the end of the continuous oil pipe drum.

[0018] Furthermore, in the utility model, the cable is locked by the ferrule and the ferrule teeth of the ferrule seat to realize the cable suspension structure. The sealing of the stationary light rod can be realized by manually adjusting the pressure cap and compressing the packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a multi-core suspension cable static sealing device for continuous tubing operations of the utility model;

[0020] Figure 2 This is a schematic diagram of the lower joint structure of the utility model;

[0021] Figure 3 The utility model is a cable installation structure Figure 1 ;

[0022] Figure 4 The utility model is a cable installation structure Figure 2 ;

[0023] Figure 5 The utility model is a cable installation structure Figure 3 ;

[0024] Figure 6 The utility model is a cable installation structure Figure 4 ;

[0025] Figure 7 The utility model is a cable installation structure Figure 5 .

[0026] In the figure, 1 is the lower joint; 2 is the connecting joint; 3 is the cable support sleeve; 4 is the upper joint; 5 is the ferrule seat; 6 is the ferrule; 7 is the pressure cap; 8 is the pressure pad; 9 is the union nut; 10 is the copper washer; 11 is the sealing packing; 12 is the first O-ring; 13 is the second O-ring; 14 is the first Parker retaining ring; 15 is the second Parker retaining ring; 16 is the hammer union nut; 17 is the cable; 18 is the wire ring; 19 is the suspension mechanism; 41 is the sealing hole. DETAILED DESCRIPTION

[0027] The utility model will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0028] like Figure 1 As shown, the utility model provides a static sealing device for a multi-core suspension cable for continuous tubing operation, comprising: a lower joint 1 and a connection joint 2 which are sealed and connected in sequence, wherein the connection joint 2 and the connection joint 2 are provided with through holes for the cable 17 to pass through; a suspension mechanism is suspended on the lower joint 1; a suspension mechanism 19 for clamping and stripping the cable is provided in the connection joint 2, an upper joint 4 is installed on the top of the connection joint 2, and a plurality of sealing holes 41 are provided on the upper joint 4, and the stripped cable core passes through the sealing mechanism in the sealing hole 41 through the sealing mechanism. A first O-ring 12 and a first Parker retaining ring 14 are installed between the lower joint 1 and the connection joint 2.

[0029] Specifically, the suspension mechanism 19 in the present utility model comprises: a ferrule seat 5 sleeved on the cable 17, a wire ring 18, and a ferrule 6;

[0030] The wire ring sleeve 18 is engaged with the bottom of the ferrule seat 5. After the cable 17 above the wire ring sleeve 18 is stripped inside and outside, a stripped cable is formed. The outer layer of the stripped cable is engaged with the ferrule seat 5. The inner layer of the stripped cable passes through the ferrule 6 and is bent and evenly distributed above the ferrule 6. A pressure pad 8 is installed on the ferrule 6. The outer layer of the cable is stripped along the rotation direction of the cable above the wire ring sleeve 18, so that the stripped outer layer of the cable is evenly distributed in the ferrule seat. At the same time, the ferrule is inserted from the upper part of the cable and inserted into the ferrule seat. The inner layer of the cable is stripped along the rotation direction of the cable above the ferrule, and is bent and evenly distributed above the ferrule. After the installation of the suspension mechanism, the cable is fixed and suspended.

[0031] Preferably, a second O-ring 13 and a second Parker retaining ring 15 are installed between the connecting joint 2 and the upper joint 4 .

[0032] Furthermore, the upper joint 4 is sealed and installed on the top of the connecting joint 2, and the sealing mechanism includes: a sealing packing 11 and a pressure cap 7 installed in the sealing hole 41, and the cable core passes through the sealing packing 11 and the pressure cap 7 for output. A copper washer 10 is also arranged between the sealing packing 11 and the pressure cap 7, and a union nut 9 is installed outside the connecting joint 2. The upper joint 4, the union nut 9, the second O-ring 13, the second Parker retaining ring 15, the copper washer 10, the sealing packing 11, the pressure cap 7, and the connecting joint 2 realize the sealing of the cable bare rod through the sealing mechanism; the connecting joint 2 is connected and sealed with the connecting joint 2 through the copper washer 10, the sealing packing 11, the pressure cap 7 and the threaded union nut 9 provided by itself. The sealing packing 11 can adjust the compression degree through the pressure cap 7 to maintain the sealing effect. By installing the copper gasket, sealing packing and pressure cap into the multiple small holes of the upper joint, hanging the hammer union nut 16 on the upper joint, and pulling the whole down to install it into the connecting joint, a sealing structure with multiple small holes distributed more evenly for the force after the outer layer of the cable is stripped off is achieved.

[0033] The cable installation process specifically includes:

[0034] 1. If Figure 2 As shown, the cable 17 is inserted from the cable support sleeve 3, the hammer union nut 16, and the bottom of the lower joint 1, and then inserted into the ferrule seat 5 and the wire ring sleeve 18 in sequence, leaving enough cable at the top for sealing and wiring;

[0035] 2. If Figure 3 As shown, the outer layer of the cable is peeled off along the rotation direction of the cable above the wire ring sleeve 18;

[0036] 3. If Figure 4 As shown, lift the ferrule seat 5 so that the stripped outer layer of the cable is evenly distributed in the ferrule seat 5, and at the same time, insert the ferrule 6 from the upper part of the cable and insert it into the ferrule seat 5;

[0037] 4. If Figure 5 As shown, the inner layer of the cable is peeled off along the rotation direction of the cable above the ferrule 6, and is bent and evenly distributed above the ferrule 6;

[0038] 5. If Figure 6 As shown, pull the suspension structure seat into the lower joint 1, insert the sequence pressure pad 8 and the connecting joint 2 from the upper part of the cable 17 in sequence, and tighten the threads between the lower joint 1 and the connecting joint 2;

[0039] 6. If Figure 7 As shown, multiple cable cores are passed through the four sealing holes 41 of the upper joint, the upper joint 4 is installed in the connecting joint 2, and connected to the connecting joint 2 with a union nut 9. The copper washer 10, the sealing packing 11, and the pressure cap 7 are sequentially passed through the cable 41 and installed in the upper joint 4, and the pressure cap 7 is tightened.

[0040] It is obvious to those skilled in the art that the above-mentioned specific examples are only preferred schemes of the present invention. Therefore, the improvements and changes that may be made by those skilled in the art to certain parts of the present invention still reflect the principles of the present invention and achieve the purpose of the present invention, and all belong to the scope of protection of the present invention.

Claims

1. A multi-core suspension cable static sealing device for coiled tubing operations, characterized in that: include: A lower joint (1) and a connecting joint (2) are sealed and connected in sequence, wherein the connecting joint (2) and the connecting joint (2) are provided with through holes for the cable (17) to pass through; a hanging mechanism is suspended on the lower joint (1); a hanging mechanism (19) is provided in the connecting joint (2) for clamping the stripped cable; an upper joint (4) is installed on the top of the connecting joint (2), and a plurality of sealing holes (41) are provided on the upper joint (4), and the stripped cable core passes through the sealing mechanism in the sealing hole (41) through the sealing mechanism.

2. The multi-core suspension cable static sealing device for coiled tubing operation according to claim 1, characterized in that: The suspension mechanism (19) comprises: a ferrule seat (5) sleeved on the cable (17), a steel wire ring (18), and a ferrule (6); The steel wire ring sleeve (18) is engaged with the bottom of the ferrule seat (5), and the cable (17) above the steel wire ring sleeve (18) is stripped inside and outside to form a stripped cable. The outer layer cable of the stripped cable is engaged with the ferrule seat (5), and the inner layer cable of the stripped cable passes through the ferrule (6) and is bent and evenly distributed above the ferrule (6).

3. The multi-core suspension cable static sealing device for coiled tubing operation according to claim 2, characterized in that: A pressure pad (8) is installed on the clamping sleeve (6).

4. The multi-core suspension cable static sealing device for coiled tubing operation according to claim 1, characterized in that: The upper joint (4) is sealingly installed on the top of the connecting joint (2), and the sealing mechanism comprises: a sealing packing (11) and a pressure cap (7) installed in the sealing hole (41), and the cable core passes through the sealing packing (11) and the pressure cap (7) for output.

5. The multi-core suspension cable static sealing device for coiled tubing operation according to claim 4, characterized in that: A copper gasket (10) is also provided between the sealing packing (11) and the pressure cap (7).

6. The multi-core suspension cable static sealing device for coiled tubing operation according to claim 1 or 4, characterized in that: A union nut (9) is installed outside the connection joint (2).

7. The multi-core suspension cable static sealing device for coiled tubing operation according to claim 4, characterized in that: A second O-ring (13) and a Parker retaining ring (15) are installed between the connecting joint (2) and the upper joint (4).

8. The multi-core suspension cable static sealing device for coiled tubing operation according to claim 1, characterized in that: A first O-type sealing ring (12) and a first Parker retaining ring (14) are installed between the lower joint (1) and the connecting joint (2).

9. The multi-core suspension cable static sealing device for coiled tubing operation according to claim 1, characterized in that: A cable support sleeve (3) is installed on the inlet of the lower connector (1).

10. The multi-core suspension cable static sealing device for coiled tubing operation according to claim 1 or 9, characterized in that: A hammer union nut (16) is installed on the lower joint (1).

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