Well-drilling butt-joint conductive wire-passing joint structure

Abstract

The utility model provides a well drilling butt joint conductive wire-passing joint structure, a male joint and a female joint realize auxiliary sealing through synchronous two-stage thread pair screwing, two sealing O-shaped rings on the male joint and the female joint realize main sealing, and sealing insulation hard contact rings are arranged on the outer wall of the male joint and the inner wall of the female joint. The first-stage thread is located between the first-stage thread and the second-stage thread Wire holes are arranged in the male joint and the female joint, and male joint embedded wires and female joint embedded wires are respectively embedded in the sealing insulation hard contact ring. After contacting, the hard contact copper ring extrudes the metal contact ring sleeve along with screwing-on of the threads, and tight contact of the male connector metal contact body and the female connector metal contact body is achieved. The joint is simple in structure, and solves the problem of stress concentration of sealing insulation and joint conducting ring positions. High-speed real-time transmission of data and power supply to underground instruments can be realized, and the bottleneck of data transmission and underground power supply in the current drilling informatization and intelligentization process can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wire harnesses, and in particular relates to a drilling butt-jointed conductive wire joint structure. Background Art

[0002] Oil drilling presents numerous challenges stemming from heterogeneity, uncertainty, non-structural nature, and non-quantitative nature. Addressing these "black box" engineering issues urgently requires information technology, intelligent technology, and contemporary high-end science and technology. Intelligent drilling theory and technology will rise to the challenge and develop rapidly. Oil drilling, completion, and production are entering a phase of informatization, intelligence, and automation, and are experiencing rapid growth. With the expansion of offshore oil and gas resources in my country and the increasing demand for developing complex onshore oil and gas fields and difficult-to-recover and difficult-to-produce reserves, underbalanced drilling of complex well structures (horizontal wells, extended reach wells, and multilateral wells) and gas drilling are steadily developing. The growing development of modern rotary steerable drilling technology, advanced geosteering drilling based on logging while drilling and seismic while drilling, and downhole diagnostics and control of drilling dynamic parameters are increasingly making wireless measurement while drilling technologies like mud pulse incapable of meeting the requirements of these new drilling technologies.

[0003] Mud pulses, due to their low transmission rate, cannot meet the requirements of information-based drilling. Wireless electromagnetic wave transmission methods, however, remain limited to shallow wells due to the severe attenuation of electromagnetic waves in the wellbore formation. Testing of smart tubing and smart flexible coiled tubing has shown that their mechanical properties are far inferior to those of drill pipe, limiting their application to shallow wells. Therefore, wired transmission via smart drill pipe is the fundamental solution to intelligent drilling. Utility Model Content

[0004] The purpose of the utility model is to solve the sealing problem of drill pipe joints and the hard contact problem between joints in the prior art.

[0005] To achieve the above-mentioned object, the present application provides a drilling butt joint conductive wire joint, comprising a female joint and a male joint, wherein the female joint and the male joint are screwed together by a first thread and a second thread axially spaced apart, and an upper shoulder surface and a lower shoulder surface are designed at both ends of the female joint and the male joint;

[0006] A female connector wire hole is provided in the female connector, and a sealed insulating hard contact ring is installed in the female connector wire hole; a male connector wire hole is provided in the male connector, and a sealed insulating hard contact ring is installed in the male connector wire hole;

[0007] The sealed insulating hard contact ring includes a terminal, which is connected to one end of the banana plug stem through a thread. The other end of the banana plug stem is inserted into a compressible rubber insulating sleeve. A non-metallic insulating sleeve is fixed to the banana plug stem. Two sealing O-rings are installed on the upper and lower sides of the non-metallic insulating sleeve. The metal contact ring is bonded to the compressible rubber insulating sleeve using high-temperature adhesive or injection molding.

[0008] There are four sealing O-rings on the outer wall of the male connector, and the four sealing O-rings are respectively located on the upper and lower sides of the sealing insulating hard contact ring;

[0009] Furthermore, both the male connector and the female connector are metal parts.

[0010] Furthermore, a positioning hole is installed on the metal contact ring.

[0011] Furthermore, two positioning posts are provided on the sealing insulating hard contact ring.

[0012] Beneficial effects:

[0013] 1. The dual-stage thread and dual-top structure make the mechanical properties of the joint better than those of ordinary drill pipe joints. On the other hand, the sealing insulating hard contact ring is arranged between the dual-stage threads to solve the problem of stress concentration during the stress process of the sealing insulating hard contact ring.

[0014] 2. The sealing insulating hard contact ring is designed with a retractable structure, ensuring reliable hard contact between connectors and compensating for dimensional errors caused by processing, ensuring reliable contact and reliable electrical conduction. Two positioning posts are designed on the sealing insulating hard contact ring to assist with installation and prevent rotation of the sealing insulating hard contact ring, which could cause insulation failure. In addition to the dual-stage threading to seal the sealing insulating hard contact ring, a sealing ring is also designed on the connector to ensure a reliable seal.

[0015] 3. This connector features a simple structure and low cost. While ensuring power, signal, and torque transmission, it addresses stress concentration issues in the seal insulation and conductive ring of the connector. It enables high-speed, real-time data transmission and power supply to downhole instruments, resolving bottlenecks in data transmission and downhole power supply during the current informatization and intelligentization of drilling. This realization of downhole informatization and intelligentization can significantly improve drilling efficiency and safety, reduce oilfield exploration and development costs, and better serve oil and gas exploration and development. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the assembly drawing provided by the utility model;

[0017] Figure 2 The utility model provides Figure 1 A partial enlarged view of

[0018] Figure 3 This is a schematic diagram of the composition of the sealed insulating hard contact ring provided by the utility model;

[0019] Figure 4 This is a three-dimensional model diagram of the sealed insulating hard contact ring provided by the utility model;

[0020] Figure 5 This is a cross-sectional view of the female connector provided by the present utility model;

[0021] Figure 6 This is a cross-sectional view of the male connector provided by the present utility model.

[0022] Figure markings: 1-female connector, 101 female connector wire hole, 2-male connector, 201-male connector wire hole, 3-first-stage thread, 4-second-stage thread, 5-upper shoulder surface, 6-lower shoulder surface, 7-sealing insulating hard contact ring, 701-terminal, 702-banana plug rod, 703-metal contact ring, 704-non-metallic insulating sleeve, 705-compressible rubber insulating sleeve, 706-positioning column, 8-sealing O-ring. DETAILED DESCRIPTION

[0023] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0024] The structure of the present utility model is described in detail below with reference to the accompanying drawings.

[0025] Please refer to Figures 1-6 A drilling docking conductive wire joint structure includes a female joint 1 and a male joint 2. The female joint 1 and the male joint 2 are both metal parts. The female joint 1 and the male joint 2 are screwed together by a first thread 3 and a second thread 4 arranged axially at intervals to achieve auxiliary sealing; the female joint 1 and the male joint 2 achieve main sealing through a sealing O-ring 8, and the first-level thread 3 and the second-level thread 4 are commonly used sealing threads for drilling.

[0026] An upper shoulder surface 5 and a lower shoulder surface 6 are designed at both ends of the female connector 1 and the male connector 2. The female connector 1 and the male connector 2 are in hard contact through the upper shoulder surface 5 and the lower shoulder surface 6 after the connector is tightened, which can reduce the torque borne by the double-stage thread and increase the torsional resistance of the connector.

[0027] A female connector wire hole 101 is provided in the female connector 1, a sealed insulating hard contact ring 7 is installed in the female connector wire hole 101, and a female connector pre-buried wire is embedded in the sealed insulating hard contact ring 7 in the female connector 1;

[0028] A male connector wire hole 201 is provided in the male connector 2 , a sealed insulating hard contact ring 7 is installed in the male connector wire hole 201 , and a male connector pre-buried wire is pre-buried in the sealed insulating hard contact ring 7 in the male connector 2 .

[0029] Electrical conduction is achieved by passing pre-buried wires through male and female connectors 2 and 1, respectively, through male and female connector wire holes 201 and 101, and then welding them to terminal 701 on sealed, insulating, and hard contact ring 7. The sealed, insulating, and hard contact rings 7 in female and male connectors 1 and 2 are arranged symmetrically, located between first and second threads 3 and 4.

[0030] During the double-stage thread tightening process, the sealing, insulating, hard-contact rings 7 on the female connector 1 and male connector 2 are bonded to the female connector 1 and male connector 2, respectively. During this process, the sealing, insulating, hard-contact rings 7 on the female and male connectors 1 and 2 gradually come into contact, achieving electrical continuity and connecting the conductors to the next stage of drill pipe. The first-stage threads 3 and second-stage threads 4 on either side of the sealing, insulating, hard-contact ring 7 respectively provide voltage reduction, sealing insulation, and torque transmission, resulting in relatively uniform stress levels on the sealing, insulating, hard-contact ring 7. The torsional force of the threads at both ends securely envelops the central sealing, insulating, hard-contact ring 7, effectively addressing high vibration issues.

[0031] The sealing insulating hard contact ring 7 includes a terminal 701, which is threadedly connected to one end of a banana plug stem 702. The other end of the banana plug stem 702 is inserted into a compressible rubber insulating sleeve 705. A non-metallic insulating sleeve 704 is fixed to the banana plug stem 702, positioned between the terminal 701 and the compressible rubber insulating sleeve 705. Two sealing O-rings 8 are mounted on the upper and lower sides of the non-metallic insulating sleeve 704. A metal contact ring 703 is bonded to the compressible rubber insulating sleeve 705 using high-temperature adhesive or injection molding. Mounting holes are provided in the metal contact ring 703 for positioning the sealing insulating hard contact ring 7 with the female connector 1 and the male connector 2. In addition to the terminal, the sealing insulating hard contact ring 7 is also designed with two positioning posts 706 to assist in positioning and prevent the sealing insulating hard contact ring 7 from rotating relative to the connector, which could damage the terminal 701 and cause insulation failure.

[0032] Metal contact ring 703 and banana plug stem 702 are in contact with each other through the banana plug head, allowing for axial movement. During thread tightening, after metal contact ring 703 and banana plug stem 702 come into contact, further tightening of the thread causes metal contact ring 703 to squeeze compressible rubber insulating sleeve 705, causing metal contact ring 703 to move relative to banana plug stem 702. Furthermore, during this compression process, the two sealing insulating hard contact rings 7 squeeze their compressible rubber insulating sleeves 705 against the end faces of metal contact ring 703, wrapping the metal surfaces and achieving secondary sealing and insulation. A sealing O-ring 8 is mounted on the non-metallic insulating sleeve 704 to stabilize terminal 701, reduce vibration, and provide a seal.

[0033] The metal contact ring 703 of the sealed insulating hard contact ring 7 can move relative to the banana plug rod 702, so as to compensate for the gap between the joints after the joints are tightened, thereby ensuring reliable electrical conduction.

[0034] Four sealing O-rings 8 are provided on the outer wall of the male connector 2, and the four sealing O-rings 8 are respectively located on the upper and lower sides of the sealing insulating hard contact ring 7. The main seal between the male connector 2 and the female connector 1 is achieved by the four sealing O-rings 8.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A drilling butt joint conductive wire joint structure, characterized in that: The female connector and the male connector are connected by a first thread and a second thread that are axially spaced apart, and an upper shoulder surface and a lower shoulder surface are designed at both ends of the female connector and the male connector; A female connector wire hole is provided in the female connector, and a sealed insulating hard contact ring is installed in the female connector wire hole; a male connector wire hole is provided in the male connector, and a sealed insulating hard contact ring is installed in the male connector wire hole; The sealed insulating hard contact ring includes a terminal, which is connected to one end of the banana plug stem through a thread. The other end of the banana plug stem is inserted into a compressible rubber insulating sleeve. A non-metallic insulating sleeve is fixed to the banana plug stem. Two sealing O-rings are installed on the upper and lower sides of the non-metallic insulating sleeve. The metal contact ring is bonded to the compressible rubber insulating sleeve using high-temperature adhesive or injection molding. Four sealing O-rings are provided on the outer wall of the male connector, and the four sealing O-rings are respectively located on the upper and lower sides of the sealing insulating hard contact ring.

2. The drilling butt joint conductive wire joint structure according to claim 1, characterized in that: Both the male and female connectors are metal parts.

3. The drilling butt joint conductive wire joint structure according to claim 1, characterized in that: Positioning holes are installed on the metal contact ring.

4. The drilling butt joint conductive wire joint structure according to claim 1, characterized in that: Two positioning columns are provided on the sealing insulating hard contact ring.

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