Coiled tubing high-voltage cable hanger for oil field

Abstract

The utility model relates to the technical field of oil field equipment, and discloses a coiled tubing high-voltage cable hanger for an oil field, which comprises a connecting and hanging joint pipe, a pressing screw is arranged in one end of the connecting and hanging joint pipe, and the surface of one end of the connecting and hanging joint pipe is in threaded connection with a pressure-bearing sealing bin pipe. A connecting piece is arranged at one end of the pressure-bearing sealing bin pipe, and the interior of one end of the pressure-bearing sealing bin pipe is in threaded connection with an isolation bin pipe. According to the coiled tubing high-voltage cable hanger for the oil field, cable communication and isolated sealing between the coiled tubing and the external environment are achieved through the arrangement of the connection hanging joint pipe, the pressing screw, the pressure-bearing sealing bin pipe and the isolation bin pipe, and when pressure exists in the coiled tubing, communication and sealing can be well achieved; and the situation that the pressure of the wellhead is higher and higher, sealing failure is caused, and communication signals are affected is avoided, and the pressure-bearing sealing and communication functions of the cable-penetrating continuous oil pipe under the internal pressure of 105 MPa can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field equipment, in particular to a continuous oil tubing high-voltage cable hanger for oil fields. Background Art

[0002] Oilfield production often requires coiled tubing (CT) to transport downhole instruments. This requires cables to power the instruments and transmit signals collected by the instruments to surface data processing equipment. This presents a sealing issue for the connection between the CT and the surface drum.

[0003] Existing coiled tubing cable hangers for oilfields are difficult to install on-site, requiring a high level of professional expertise. Furthermore, conventional rubber seals are typically used between the cable and the hanger. As wellhead pressures continue to rise, conventional low-pressure coiled tubing hangers are no longer sufficient. This makes it difficult to maintain internal cable communication and seal the coiled tubing itself in high-pressure environments. Utility Model Content

[0004] (1) Technical problems solved

[0005] The purpose of the present invention is to provide a high-voltage cable hanger for coiled tubing in oil fields, so as to solve the problem in the above background technology that it is difficult to solve the communication problem of the cable inside the coiled tubing and the sealing problem of the coiled tubing itself under high-pressure environment.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a continuous oil tubing high-voltage cable hanger for oil fields, including a connecting suspension joint pipe, a tightening screw is provided inside one end of the connecting suspension joint pipe, and a pressure-bearing sealing warehouse pipe is threadedly connected to the surface of the connecting suspension joint pipe at one end, and a connecting piece is provided at one end of the pressure-bearing sealing warehouse pipe.

[0008] As a further solution of the present invention, the internal thread of one end of the pressure-bearing sealed warehouse tube is connected to the isolation warehouse tube, and the surface of the isolation warehouse tube is slidably connected to the connecting piece, which facilitates the sealed connection.

[0009] As a further solution of the present invention, a fastening tube is sleeved on the surface of one end of the isolation warehouse tube, and a wiring warehouse tube is clamped inside the fastening tube, which is convenient for placing cables.

[0010] As a further solution of the present invention, the other end of the wiring bin tube is threadedly connected to the inside of one end of the isolation bin tube. The wiring bin tube is made of corrosion-resistant material, and the isolation bin tube facilitates sealing the internal cable of the continuous oil pipeline and the communication line of the ground acquisition processor.

[0011] As a further solution of the present invention, a ground acquisition processor communication line is provided inside the wiring warehouse tube, and an insulating rubber is provided on the surface of the ground acquisition processor communication line, which has wear-resistant and insulating properties.

[0012] As a further solution of the present invention, a limiting groove is provided on the surface of the wiring warehouse tube, and a sealing groove is provided on the surface of the isolation warehouse tube, and the sealing groove is convenient for installation with an external sealing component.

[0013] As a further solution of the present invention, an insulating layer is provided inside the pressure-bearing sealed warehouse pipe. The material of the insulating layer is insulating silicone grease, which is convenient for preventing the liquid in the continuous oil pipe from causing cable insulation failure.

[0014] (3) Beneficial effects

[0015] The utility model provides a coiled tubing high-voltage cable hanger for oil fields, which has the following beneficial effects:

[0016] The oil field uses a continuous tubing high-voltage cable hanger. By connecting the suspension joint pipe, tightening screws, pressure-bearing sealing warehouse pipes and isolation warehouse pipes, a pressure-bearing sealing warehouse pipe and an isolation warehouse pipe are added to the connection between the continuous tubing with the cable inside and the drum. The suspension joint pipe and the tightening screws are connected to fix the cable. At the same time, high-quality insulating silicone grease is filled in the pressure-bearing sealing warehouse pipe to prevent the liquid in the continuous tubing from causing cable insulation failure. The isolation warehouse pipe and the pressure-bearing sealing warehouse pipe are sealed with connectors to prevent high-voltage damage caused by pressure leakage. The wiring warehouse pipe facilitates the connection of the internal cable of the continuous tubing with the communication line of the ground acquisition processor, thereby achieving cable communication and isolation and sealing of the continuous tubing from the external environment. When there is pressure inside the continuous tubing, communication and sealing can be well achieved, avoiding the wellhead pressure from becoming increasingly high, resulting in seal failure and affecting its communication signal, which helps to achieve the pressure sealing and communication functions of the cable-through continuous tubing under an internal pressure of 105MPa. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the connection between the suspension joint pipe and the compression screw of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the isolation warehouse pipe and the wiring warehouse pipe of the utility model.

[0020] In the figure: 1. Connecting suspension joint pipe; 2. Tightening screw; 3. Pressure-bearing sealing warehouse pipe; 4. Connecting piece; 5. Isolation warehouse pipe; 6. Fastening pipe; 7. Wiring warehouse pipe; 8. Ground acquisition processor communication line; 9. Insulation layer. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 3 The utility model provides a technical solution: a coiled tubing high-voltage cable hanger for oil fields, comprising a connecting suspension joint pipe 1, a compression screw 2 is provided inside one end of the connecting suspension joint pipe 1, a pressure-bearing sealing warehouse pipe 3 is threadedly connected to the surface of the connecting suspension joint pipe 1, and a connecting piece 4 is provided at one end of the pressure-bearing sealing warehouse pipe 3. By connecting the suspension joint pipe 1, the compression screw 2, the pressure-bearing sealing warehouse pipe 3 and the isolation warehouse pipe 5, the pressure-bearing sealing warehouse pipe 3 and the isolation warehouse pipe 5 are added at the connection between the coiled tubing with the cable inside and the drum, the cable is fixed by connecting the suspension joint pipe 1 and the compression screw 2, and the pressure-bearing sealing warehouse pipe 3 is fixed at the same time. High-quality insulating silicone grease is installed to prevent the liquid in the continuous oil pipe from causing cable insulation failure. The isolation warehouse pipe 5 and the pressure-bearing sealing warehouse pipe 3 are sealed with a connector 4 to prevent high-pressure damage caused by pressure leakage. The wiring warehouse pipe 7 facilitates the connection of the internal cable of the continuous oil pipe with the communication line 8 of the ground acquisition processor, thereby achieving cable communication and isolation and sealing between the continuous oil pipe and the external environment. When there is pressure inside the continuous oil pipe, communication and sealing can be well achieved, avoiding the wellhead pressure becoming higher and higher, resulting in seal failure and affecting its communication signal, which helps to achieve the pressure-bearing sealing and communication functions of the cable-through continuous oil pipe under an internal pressure of 105MPa.

[0023] The internal thread of one end of the pressure-bearing sealed warehouse tube 3 is connected to the isolation warehouse tube 5, and the surface of the isolation warehouse tube 5 is slidably connected to the connecting piece 4. The setting of the connecting piece 4 plays a role in sealing the pressure-bearing sealed warehouse tube 3 and the isolation warehouse tube 5, avoiding pressure leakage at the connection point and preventing high-pressure damage caused by pressure leakage;

[0024] A fastening tube 6 is sleeved on the surface of one end of the isolation chamber tube 5, and a wiring chamber tube 7 is clamped inside the fastening tube 6. The arrangement of the wiring chamber tube 7 facilitates the connection between the internal cable of the coiled tubing and the communication line 8 of the surface acquisition processor.

[0025] The other end of the wiring bin tube 7 is threadedly connected to the inside of one end of the isolation bin tube 5. The wiring bin tube 7 is made of corrosion-resistant material, and the isolation bin tube 5 is provided to provide a seal.

[0026] The interior of the wiring warehouse pipe 7 is provided with a ground acquisition processor communication line 8, and the surface of the ground acquisition processor communication line 8 is provided with insulating rubber. Through the setting of the ground acquisition processor communication line 8, the function of signal transmission is played;

[0027] The surface of the wiring warehouse pipe 7 is provided with a limit groove, and the surface of the isolation warehouse pipe 5 is provided with a sealing groove. The setting of the limit groove plays a role in sealing the fastening pipe 6;

[0028] An insulating layer 9 is provided inside the pressure-bearing sealed warehouse pipe 3. The insulating layer 9 is made of insulating silicone grease. The setting of the insulating layer 9 prevents the liquid in the coiled tubing from causing cable insulation failure.

[0029] In the present invention, the working steps of the device are as follows:

[0030] Step 1: Add a pressure-sealing tube 3 and an isolation tube 5 to the connection between the coiled tubing (through which the cable passes) and the drum. Connect the suspension joint tube 1 and the compression screw 2 to secure the cable. Fill the pressure-sealing tube 3 with high-quality insulating silicone grease to prevent liquid in the coiled tubing from causing cable insulation failure.

[0031] The second step: Use the connector 4 to seal the isolation tank pipe 5 and the pressure-bearing sealing tank pipe 3 to prevent high-pressure damage caused by pressure leakage. The wiring tank pipe 7 facilitates the connection between the internal cable of the oil refill pipe and the ground acquisition processor communication line 8. It should be noted that the device structure and the accompanying drawings of the present invention mainly describe the principle of the present invention. In terms of the technology of this design principle, the settings of the device's power mechanism, power supply system and control system are not fully described. On the premise that those skilled in the art understand the principles of the above-mentioned utility model, they can clearly know the details of its power mechanism, power supply system and control system. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art.

[0032] The standard parts used can be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the components known to technical personnel in this field, their structures and principles can be known to these technical personnel through technical manuals or through conventional experimental methods.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coiled tubing high-voltage cable hanger for oil fields, comprising a connecting hanger joint pipe (1), characterized in that: A compression screw (2) is provided inside one end of the connecting suspension joint pipe (1), a pressure-bearing sealing warehouse pipe (3) is threadedly connected to the surface of one end of the connecting suspension joint pipe (1), and a connecting piece (4) is provided at one end of the pressure-bearing sealing warehouse pipe (3).

2. The coiled tubing high-voltage cable hanger for oil fields according to claim 1, characterized in that: One end of the pressure-bearing sealed warehouse tube (3) is internally threadedly connected to an isolation warehouse tube (5), and the surface of the isolation warehouse tube (5) is slidably connected to the connecting piece (4).

3. The coiled tubing high-voltage cable hanger for oil fields according to claim 2, characterized in that: A fastening tube (6) is sleeved on the surface of one end of the isolation warehouse tube (5), and a wiring warehouse tube (7) is clamped inside the fastening tube (6).

4. The coiled tubing high-voltage cable hanger for oil fields according to claim 3, characterized in that: The other end of the wiring bin tube (7) is threadedly connected to the interior of one end of the isolation bin tube (5), and the wiring bin tube (7) is made of a corrosion-resistant material.

5. The coiled tubing high-voltage cable hanger for oil fields according to claim 3, characterized in that: A ground acquisition processor communication line (8) is provided inside the wiring warehouse tube (7), and an insulating rubber is provided on the surface of the ground acquisition processor communication line (8).

6. The coiled tubing high-voltage cable hanger for oil fields according to claim 5, characterized in that: A limiting groove is provided on the surface of the wiring warehouse tube (7), and a sealing groove is provided on the surface of the isolation warehouse tube (5).

7. The coiled tubing high-voltage cable hanger for oil fields according to claim 1, characterized in that: An insulating layer (9) is provided inside the pressure-bearing sealed warehouse tube (3), and the insulating layer (9) is made of insulating silicone grease.

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