CN112993658A

CN112993658A - Electric signal connecting device for underwater high-pressure environment

Info

Publication number: CN112993658A
Application number: CN202110204202.8A
Authority: CN
Inventors: 耿淦; 时好振; 顾鹏
Original assignee: Schlumberger Oilfield Technologies Shandong Co ltd
Current assignee: Schlumberger Oilfield Technologies Shandong Co ltd
Priority date: 2021-02-24
Filing date: 2021-02-24
Publication date: 2021-06-18
Anticipated expiration: 2041-02-24
Also published as: CN112993658B

Abstract

The invention relates to the technical field of petroleum drilling, and provides an electric signal connecting device for an underwater high-pressure environment, wherein a male end assembly with a plurality of annular contacts is configured to be repeatedly engaged with and separated from a female end socket assembly with a corresponding plurality of annular contact assemblies; has the advantages that: the invention ensures that the annular contact is correctly aligned with the corresponding female end annular contact and has a telescopic sealing structure; the uninterrupted electric contact of a plurality of electric and data transmission lines is kept, the field service is flexible, the time is saved, and the operation is simple and convenient; the floating frame A and the mud scraping piston can axially move and can seal and protect a plurality of male end annular contact assemblies; the floating frame B can axially move and can seal and protect a plurality of female end annular contact assemblies.

Description

Electric signal connecting device for underwater high-pressure environment

Technical Field

The invention relates to the technical field of petroleum drilling, in particular to an electric signal connecting device for an underwater high-pressure environment.

Background

In a Logging While Drilling (LWD) instrument, a plurality of drill collars are connected end to end, one or more sensors are arranged in each drill collar, a battery for supplying power to the sensors is arranged in a single drill collar, the length of the battery is about 1m, and during drilling operation, the battery is generally considered to be better when the battery is farther away from a drill bit, and conversely, the sensor is better when the battery is closer to the drill bit, because data measured by the sensors is from a stratum around a near drill bit (including a stratum around the drill bit), the steering of the drill bit controlled by the driller is more effective. It is common to deploy batteries in drill collars remote from the sensor section because larger batteries can be deployed to improve the operational capabilities of various instruments. The drill collar sections are connected, and not only are electric connections, but also various signal data connections are available. The different data signals come from different sensors, such as acoustic sensors, nuclear magnetic resonance sensors, resistivity sensors, dielectric sensors, gamma ray depth detection sensors, etc., which are arranged inside different drill collars, forming a modular tool segment for LWD (logging while drilling). The required tool sections are generally selected for combination according to the actual drilling environment. Signal transmission lines between the plurality of tool segments are interconnected. LWD tools are exposed to drilling fluid pressures of up to 172MPa downhole and are simultaneously subjected to vibratory impacts (axial vibratory impact forces in the range of 500G) from the drilling tool, which results in electrical connections between tool segments becoming a failure point for the entire tool, and multiple transmission line connections are particularly susceptible to failure, resulting in short circuits between exposed contact surfaces. It is desirable to minimize the potential points of fluid ingress into the contact area and provide an inherent connection that can withstand small amounts of fluid ingress. In fact, at the joint of two drill collars, the distance for the male end to be screwed into the female end is not fixed, so that the distance for the male end to enter the female end is considered to be adjustable when the male-female end electrical signal connecting device is designed.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provide an electric signal connecting device for an underwater high-pressure environment.

The new technical scheme of the invention is as follows: an electric signal connecting device for an underwater high-pressure environment comprises a male end plug assembly and a female end socket assembly, wherein the female end socket assembly is connected with the male end plug assembly through a sealing ring, the male end plug assembly is fixed in a drill collar A through an expansion ring, the female end socket assembly is fixed in a drill collar B through a centering ring, and the drill collar B is in threaded connection with the drill collar A; the male-end plug assembly comprises an expansion ring, a plug barrel, a stabilizing wing A, a spring retainer ring A, a threaded cap, a high-pressure plug A, a large spring, a floating frame A, a small spring, an insulating barrel, an insulating core, an insulating sleeve A, an insulating sleeve B, a male-end first-second-level contact, a top-end contact and a mud scraping piston, wherein the high-pressure plug A is installed at one end in the expansion ring, the high-pressure plug A is fixed through the threaded cap, the other end of the high-pressure plug A is connected with three wires, one wire penetrates through the insulating core and is welded with the top-end contact, the other two wires are welded with the male-end first-second-level contact through a wire groove A in the insulating barrel, the other end of the expansion ring is connected with the plug barrel through a sealing ring and threads, the stabilizing wing A is sleeved on the plug barrel, and the end of the stabilizing wing A is fixed through the, the plug comprises a plug cylinder, a plug sleeve, a plug cover, an expansion ring, a floating frame A, an insulation sleeve B, a male end first-second contact, an insulation sleeve A and a top contact, wherein a large spring is arranged between one end of the floating frame A and the end part of the expansion ring; the female-end socket assembly comprises a righting ring, a socket barrel, a stabilizing wing B, a spring retainer ring B, a sealing ring, a top end pressing cap, a sliding spring pressing cap, a top end sliding spring sleeve, a floating frame B, a socket core barrel, a small insulating sleeve, a first-level and second-level contact sliding spring, a large insulating sleeve, a spring, a high-voltage plug B, a high-voltage plug C, a wiring barrel and a plug, wherein the righting ring is connected with the socket barrel through a thread and the sealing ring, the socket barrel is sleeved with the stabilizing wing B, the stabilizing wing B is fixed through the spring retainer ring B and is in contact with the inner wall of the drill collar B, one end of the righting ring is tightly pressed with the plug, the plug is connected with the inner wall of the socket barrel through the thread, one end of the plug and the socket barrel are fixed with the high-voltage plug C through the sealing ring, and the high-voltage plug C, the novel socket comprises three wires, wherein one wire is welded at one end of a high-voltage plug B, the other end of the high-voltage plug B is welded at one end of the wire, the other end of the wire is welded with a top-end sliding spring sleeve, the other two wires are welded with a secondary-contact sliding spring sleeve through a wire groove of a wire routing cylinder, a wire routing cylinder is fixed at the end part of the high-voltage plug C and the inner wall of the socket cylinder, the outer wall of the wire routing cylinder is provided with a wire groove B, the high-voltage plug B is fixed in the wire routing cylinder, the end part of the wire routing cylinder is provided with a socket core cylinder, the end part of the socket core cylinder is fixed through a top end pressing cap, the top end pressing cap is connected with the inner wall of the socket cylinder through a sealing ring and threads, a large insulating sleeve, a small insulating sleeve and a secondary-contact sliding spring sleeve are installed in the socket core cylinder, a secondary-contact sliding spring is, A floating frame B is arranged in the small insulating sleeve and the first-level and second-level contact sliding spring sleeve, a spring is arranged between the floating frame B and the high-voltage plug B, a top sliding spring sleeve is arranged at the other end of the floating frame B, a top sliding spring is arranged in the top sliding spring sleeve, the top sliding spring sleeve is fixed through a sliding spring pressing cap, the sliding spring pressing cap is connected with the end part of the floating frame B through threads, and the sliding spring pressing cap is fixed on the inner wall of the top pressing cap through a sealing ring.

The insulating sleeve A is conical.

The insulating sleeve B is cylindrical.

The high-pressure plug A and the high-pressure plug C are three-pin high-pressure plugs.

The high-pressure plug B is a single-needle high-pressure plug.

The insulating sleeve B is 2 groups.

The first-stage and second-stage contacts at the male end are 2 groups.

And the insulating sleeve B and the male end first-stage and second-stage contacts are alternately assembled.

The invention has the beneficial effects that: the present invention is a male plug assembly having a plurality of annular contacts repeatedly engaged and disengaged with a female receptacle assembly having a corresponding plurality of annular contacts. The male end plug is longitudinally resiliently movable to ensure proper alignment of the plurality of annular contacts with the corresponding plurality of female end annular contacts. Also included is a retractable seal structure for protecting the annular contacts and contact assemblies from external fluid. The device is used for (but not limited to) high-temperature (140 ℃ or lower), high-pressure (172 MPa or lower) and mechanical impact environment in a well, and can maintain uninterrupted electrical contact of a plurality of electrical and data transmission lines. The field service is flexible, the time is saved, and the operation is simple and convenient. The male end plug assembly comprises a shell with an opening at one end, and a plurality of male end annular contact assemblies which are in contact connection with a plurality of corresponding female end annular contact assemblies to establish connection and disconnection. The male end plug is arranged on a floating frame A, the floating frame A can move axially, a mud scraping piston is arranged between the floating frame A and the opening of the shell, the mud scraping piston can move axially, and before the plug is connected with the female end socket assembly, the mud scraping piston is isolated from the outside of the opening and can seal and protect a plurality of male end annular contact assemblies. The female-end socket assembly comprises a shell with an opening at one end, an internal female-end annular contact assembly and a floating frame B capable of moving axially, wherein a female-end annular contact is placed on the floating frame B and is in contact with a first contact of a male-end annular contact. Before the connector is connected with the male-end plug assembly, the floating frame B is equivalent to a mud scraping piston and is arranged at an opening position, the mud scraping piston is isolated from the outside of the opening, and the female-end annular contact assemblies can be sealed and protected.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of a in fig. 1.

Fig. 3 is a schematic structural view of a male plug assembly.

Fig. 4 is a schematic view of the structure of a portion of the components of the male plug assembly.

Fig. 5 is a schematic structural diagram of the movement of the mud scraping piston.

FIG. 6 is a schematic view of the male plug assembly in a drill collar A.

Fig. 7 is a schematic structural view of a female-end socket assembly.

Fig. 8 is a schematic structural diagram of B in fig. 7.

Fig. 9 is a schematic view of the structure of a portion of the female jack assembly.

Fig. 10 is a schematic structural diagram of the movement of the floating frame B.

FIG. 11 is a schematic view of the female socket assembly in collar B.

Wherein: 1. male plug component, 101, expansion ring, 102, plug cylinder, 103, stabilizing wing A, 104, spring retainer A, 105, mud scraping piston, 106, top end contact, 107, insulating sleeve A, 108, male end secondary contact, 109, insulating sleeve B, 110, small spring, 111, insulating core, 112, insulating cylinder, 112-1, wire groove A, 113, floating frame A, 114, large spring, 115, high pressure plug A, 116, screw cap, 2, female end socket component, 201, centering ring, 202, socket cylinder, 203, stabilizing wing B, 204, spring retainer B, 205, seal ring, 206, top end pressure cap, 207, floating frame B, 208, spring, 209, high pressure plug B, 210, socket cylinder, 210-1, wiring groove B, 211, high pressure wire plug C, 212, screw plug, 213, large insulating sleeve, 214, secondary slide spring, 215, secondary slide spring contact, 216. a small insulating sleeve 217, a socket core barrel 218, a top end sliding spring sleeve 219, a top end sliding spring 220, a sliding spring pressing cap 3, drill collars A and 4 and a drill collar B.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

An electric signal connecting device for an underwater high-pressure environment comprises a male end plug assembly 1 and a female end socket assembly 2, wherein the female end socket assembly 2 is connected with the male end plug assembly 1 through a sealing ring 205, the male end plug assembly 1 is fixed in a drill collar A3 through an expansion ring 101, the female end socket assembly 2 is fixed in a drill collar B4 through a centering ring 201, and the drill collar B4 is in threaded connection with the drill collar A3; the male plug assembly 1 comprises an expansion ring 101, a plug cylinder 102, a stabilizing wing A103, a spring retainer ring A104, a threaded cap 116, a high-pressure plug A115, a large spring 114, a floating frame A113, a small spring 110, an insulating cylinder 112, an insulating core 111, an insulating sleeve A107, an insulating sleeve B109, a male first-second contact 108, a top contact 106 and a mud scraping piston 105, wherein the high-pressure plug A115 is installed at one end in the expansion ring 101, the high-pressure plug A115 is fixed through the threaded cap 116, the other end of the high-pressure plug A115 is connected with three wires, one wire penetrates through the insulating core 111 and is welded with the top contact 106, the other two wires are welded with the first-second contact 108 at the male end through a wire groove A112-1 in the insulating cylinder 112, the other end of the expansion ring 101 is connected with the plug cylinder 102 through a sealing ring and threads, the stabilizing wing A103 is sleeved on the plug cylinder 102, the end part of the stabilizing wing A103 is fixed through a spring retainer ring A104, a floating frame A113 is installed in the plug cylinder 102, a large spring 114 is installed between one end of the floating frame A113 and the end part of the expansion ring 101, the other end of the floating frame A113 is sequentially provided with an insulating sleeve B109, a male end primary-secondary contact 108, an insulating sleeve A107 and a top end contact 106, mud scraping pistons 105 are installed outside the insulating sleeve B109, the male end primary-secondary contact 108, the insulating sleeve A107 and the top end contact 106 through sealing rings, the outer wall of each mud scraping piston 105 is installed on the inner wall of the plug cylinder 102 through a sealing ring, an insulating cylinder 112 is installed on the inner wall of the floating frame A113, and an insulating core 111 is installed on the inner wall of the insulating cylinder 112; the female-end socket assembly 2 comprises a righting ring 201, a socket barrel 202, a stabilizing wing B203, a spring retainer B204, a sealing ring 205, a top end pressing cap 206, a sliding spring pressing cap 220, a top end sliding spring 219, a top end sliding spring sleeve 218, a floating frame B207, a socket core barrel 217, a small insulating sleeve 216, a secondary contact sliding spring sleeve 215, a secondary contact sliding spring 214, a large insulating sleeve 213, a spring 208, a high-voltage plug B209, a high-voltage plug C211, a routing barrel 210 and a plug 212, wherein the righting ring 201 is connected with the socket barrel 202 through threads and sealing rings, the socket barrel 202 is sleeved with the stabilizing wing B203, the stabilizing wing B203 is fixed through the spring retainer B204, the stabilizing wing B203 is in contact with the inner wall of a drill collar B4, one end in the righting ring 201 is pressed with the plug 212, the plug 212 is connected with the inner wall of the socket barrel 202 through threads, one end of the plug 212 is fixed in the socket barrel 202 through the sealing ring 211, the high-voltage plug C211 is welded with three wires, one wire is welded at one end of a high-voltage plug B209, the other end of the high-voltage plug B209 is welded at one end of the wire, the other end of the wire is welded with a top sliding spring sleeve 218, the other two wires are welded with a second-level contact sliding spring sleeve 215 through a wire groove of a wire routing cylinder 210, the end of the high-voltage plug C211 and the inner wall of a socket cylinder 202 are fixedly provided with a wire routing cylinder 210, the outer wall of the wire routing cylinder 210 is provided with a wire groove B210-1, the high-voltage plug B209 is fixedly arranged in the wire routing cylinder 210, the end of the wire routing cylinder 210 is provided with a socket core cylinder 217, the end of the socket core cylinder 217 is fixed through a top pressing cap 206, the top pressing cap 206 is connected with the inner wall of the socket cylinder 202 through a sealing ring and threads, a large insulating sleeve 213, a small insulating sleeve 216 and a second-level contact sliding spring sleeve 215, a second-stage contact sliding spring 214 is welded in the second-stage contact sliding spring sleeve 215, a floating frame B207 is installed in the large insulating sleeve 213, the small insulating sleeve 216 and the second-stage contact sliding spring sleeve 215, a spring 208 is installed between the floating frame B207 and the high-pressure plug B209, a top end sliding spring sleeve 218 is installed at the other end of the floating frame B207, a top end sliding spring 219 is installed in the top end sliding spring sleeve 218, the top end sliding spring sleeve 218 is fixed through a sliding spring pressing cap 220, the sliding spring pressing cap 220 is connected with the end of the floating frame B207 through threads, and the sliding spring pressing cap 220 is fixed on the inner wall of the top end pressing cap 206 through a sealing ring.

The insulating sleeve A107 is in a conical shape.

The insulating sleeve B109 is cylindrical.

The high-pressure plug A115 and the high-pressure plug C211 are three-needle high-pressure plugs.

The high-pressure plug B209 is a single-needle high-pressure plug.

The insulating sleeves B109 are 2 groups.

The first and second contacts 108 are 2 groups.

The insulating sleeve B109 and the male-end secondary contact 108 are alternately assembled.

Male plug assembly 1:

before the male end plug assembly 1 is not engaged with the female end socket assembly 2, the mud scraping piston 105 is sealed with the plug cylinder 102 through a sealing ring; the wiper piston 105 is sealed with the tip contact 106, the insulating bush a107, the male-end one-secondary contact 108, and the insulating bush B109 by seal rings, and wipes the male-end contact by axial sliding. The top contact 106, the insulating sleeve A107, the male end first-stage and second-stage contact 108 and the insulating sleeve B form a contact insulating sleeve assembly, an insulating cylinder 112 and an insulating core 111, and are assembled on a floating frame A113, wherein the top contact 106 and the male end second-stage contact 108 (2) are welded with a lead R/Y/B (namely a red/yellow/blue lead), and the lead R/Y/B respectively passes through an inner hole of the insulating core 111 and a lead groove of the insulating cylinder 112; the floating frame A113 is sealed with the plug cylinder 102 through a sealing ring, and the floating frame A113 can axially slide in the plug cylinder 102; when the wiper piston 105 and the floating frame a113 slide in the axial direction, they are restored by the small spring 110 and the large spring 114. The three-pin high-pressure plug A115 is fastened to the expansion ring 101 through a threaded cap 116, and the expansion ring 101 is sealed with the plug cylinder 102 through a sealing ring.

After the male end plug assembly 1 is meshed with the female end socket assembly 2, the top end contact 106, the insulating sleeve A107, the male end first-second contact 108 and the insulating sleeve B109 are meshed with the female end slip ring contact assembly through the butt joint of the drill collar A3 and the drill collar B4, the mud scraping piston 105 and the floating frame A113 are pushed to axially slide, the small spring 110 and the large spring 114 are compressed, and when the male end plug assembly 1 is disengaged from the female end socket assembly 2, the small spring 110 and the large spring 114 push the mud scraping piston 105 and the floating frame A113 to reset.

Female-end socket assembly 2:

when the male plug assembly 1 is mated with the female receptacle assembly 2, the receptacle cylinder 202 is sealed with the plug cylinder 102 by a sealing ring, preventing the ingress of external mud. The stabilizing wing B203 is contacted with the inner wall of the drill collar B4, so that when the male-end plug assembly 1 is butted with the female-end socket assembly 2, the coaxiality of the male-end assembly and the female-end assembly is ensured, and the male-end assembly and the female-end assembly can be smoothly plugged.

Before the male plug assembly 1 is not engaged with the female plug assembly 2, the top press cap 206 presses against the jack cylinder 217, threadably tightens on the jack cylinder 202, and seals with the jack cylinder 202. The top end sliding spring 219 is embedded in the top end sliding spring sleeve 218 and is tightly pressed on the floating frame B207 through the sliding spring pressing cap 220, the top end sliding spring sleeve 218 is connected with the single-needle high-voltage plug B209 through a conducting wire, and the first-level contact sliding spring 214 and the second-level contact sliding spring sleeve 215 are welded to fix a spring contact assembly. Through the threaded connection of the top end pressing cap 206 and the socket barrel 202, the socket core barrel 217, the small insulating sleeve 216, the second-level contact sliding spring sleeve 215, the large insulating sleeve 213, the wiring barrel 210 and the three-pin high-voltage plug C211 are sequentially pressed in the socket barrel 202. The plug 212 is screwed to the socket barrel 202.

A spring is arranged between the floating frame B207 and the single-pin high-voltage plug B209, when the male-end plug assembly 1 is meshed with the female-end socket assembly 2, the top-end contact 106, the insulating sleeve A107, the first-second-level contact 108 of the male end and the insulating sleeve B109 push the sliding spring pressing cap 220, the top-end sliding spring 219, the top-end sliding spring sleeve 218, the floating frame B207, the socket core cylinder 217, the small insulating sleeve 216, the first-second-level contact sliding spring sleeve 215, the first-second-level contact sliding spring 214 and the large insulating sleeve 213 to compress the small spring 110, the large spring 114 and the female-end socket assembly 2 spring; ensuring that the three-level contacts (including the tip and the other two contacts) are fully engaged. When the male end plug assembly 1 is separated from the female end socket assembly 2, the small spring 110, the large spring 114, the spring effective pushing piece mud scraping piston 105, the floating frame A113 assembly, the sliding spring pressing cap 220, the top sliding spring 219, the top sliding spring sleeve 218 and the floating frame B207 are reset, and all levels of contacts of the male end plug assembly 1 and the female end socket assembly 2 are protected from short circuit among the contacts caused by pollution of sludge and the like.

Wire routing:

the wire routing mainly refers to the connection of the electric signal connecting device and wires of various logging sensor modules. Routing of the male-end plug assembly 1: the tip contact 106 is soldered to a wire (red line) which passes through the insulating core 111; the male-end first-second-level contact 108 is welded with a lead (yellow line and blue line), the lead passes through a lead groove A112-1 on an insulating cylinder 112 and extends to an inner hole of the insulating cylinder 112 through a hole at one end of the lead groove A112-1, the three leads are connected with a three-pin high-voltage plug A115 arranged at the tail end of the expansion ring 101 assembly, the other end of the three-pin high-voltage plug A115 is connected with a lead of a logging sensor module, and the wiring process of the male-end plug of the logging sensor module is completed.

Female-end socket assembly 2: the top end sliding spring sleeve 218 is welded with a lead (red line), the lead penetrates through the floating frame B207 and is welded with the single-needle high-pressure plug B209, and the other end of the single-needle high-pressure plug B209 is welded and connected with the three-needle high-pressure plug C211 through the lead (red line); the first-level contact sliding spring sleeve 215 is welded with a lead (yellow line and blue line), the lead passes through a lead groove B210-1 on the wiring barrel 210 and extends to an inner hole of the wiring barrel 210 through a hole at one end of the lead groove B210-1, the lead (yellow line and blue line) is welded with a three-pin high-voltage plug C211, the other end of the three-pin high-voltage plug C211 is connected with the lead of the logging sensor module, and the wiring process of the female-end socket of the logging module is completed.

Claims

1. The utility model provides an electric signal connection device for high pressure environment under water, includes public end plug subassembly (1) and female end socket subassembly (2), its characterized in that: the female-end socket assembly (2) is connected with the male-end plug assembly (1) through a sealing ring (205), the male-end plug assembly (1) is fixed in the drill collar A (3) through an expansion ring (101), the female-end socket assembly (2) is fixed in the drill collar B (4) through a righting ring (201), and the drill collar B (4) is in threaded connection with the drill collar A (3); the male-end plug assembly (1) comprises an expansion ring (101), a plug barrel (102), a stabilizing wing A (103), a spring retainer ring A (104), a threaded cap (116), a high-pressure plug A (115), a large spring (114), a floating frame A (113), a small spring (110), an insulating barrel (112), an insulating core (111), an insulating sleeve A (107), an insulating sleeve B (109), a male-end secondary contact (108), a top-end contact (106) and a mud scraping piston (105), wherein the high-pressure plug A (115) is installed at one end in the expansion ring (101), the high-pressure plug A (115) is fixed through the threaded cap (116), the other end of the high-pressure plug A (115) is connected with three wires, one wire penetrates through the insulating core (111) to be welded with the top-end contact (106), and the other two wires are welded with the male-end secondary contact (108) through a wire groove A (112-1) in the insulating barrel (112), the expansion ring (101) other end pass through sealing washer and screw thread and be connected with plug cylinder (102), plug cylinder (102) go up the cover and have and stabilize wing A (103), stable wing A (103) tip pass through circlip A (104) fixed, plug cylinder (102) in install floating frame A (113), floating frame A (113) one end and expansion ring (101) tip between install big spring (114), floating frame A (113) other end install insulating bush B (109), public end second grade contact (108), insulating bush A (107) and top end contact (106) in proper order, insulating bush B (109), public end second grade contact (108), insulating bush A (107) and top end contact (106) outside install through the sealing washer and scrape mud piston (105), scrape mud piston (105) outer wall install at plug cylinder (102) inner wall through the sealing washer, an insulating cylinder (112) is installed on the inner wall of the floating frame A (113), and an insulating core (111) is installed on the inner wall of the insulating cylinder (112); the female-end socket assembly (2) comprises a centralizing ring (201), a socket barrel (202), a stabilizing wing B (203), a spring retainer ring B (204), a sealing ring (205), a top end pressing cap (206), a sliding spring pressing cap (220), a top end sliding spring (219), a top end sliding spring sleeve (218), a floating frame B (207), a socket core barrel (217), a small insulating sleeve (216), a secondary contact sliding spring sleeve (215), a secondary contact sliding spring (214), a large insulating sleeve (213), a spring (208), a high-voltage plug B (209), a high-voltage plug C (211), a wiring barrel (210) and a screw plug (212), wherein the centralizing ring (201) is connected with the socket barrel (202) through threads and the sealing ring, the socket barrel (202) is sleeved with the stabilizing wing B (203), the stabilizing wing B (203) is fixed through the spring retainer ring B (204), and the stabilizing wing B (203) is in contact with the inner wall of the drill collar B (4), one end in the righting ring (201) is tightly pressed with a plug (212), the plug (212) is connected with the inner wall of the socket barrel (202) through threads, one end of the plug (212) and the inside of the socket barrel (202) are fixed with a high-pressure plug C (211) through a sealing ring, the high-pressure plug C (211) is welded with three leads, one lead is welded at one end of a high-pressure plug B (209), the other end of the high-pressure plug B (209) is welded at one end of the lead, the other end of the lead is welded with a top end sliding spring sleeve (218), the other two leads are welded with a two-stage contact sliding spring sleeve (215) through a lead groove of a wire routing barrel (210), the end part of the high-pressure plug C (211) and the inner wall of the socket barrel (202) are fixed with the wire routing barrel (210), and the outer wall of the wire routing barrel (210) is provided with a lead groove B (210-1), a high-voltage plug B (209) is fixed in the wiring barrel (210), a socket core barrel (217) is installed at the end of the wiring barrel (210), the end of the socket core barrel (217) is fixed through a top end pressing cap (206), the top end pressing cap (206) is connected with the inner wall of the socket barrel (202) through a sealing ring and threads, a large insulating sleeve (213), a small insulating sleeve (216) and a secondary contact sliding spring sleeve (215) are installed in the socket core barrel (217), a secondary contact sliding spring (214) is welded in the secondary contact sliding spring sleeve (215), a floating frame B (207) is installed in the large insulating sleeve (213), the small insulating sleeve (216) and the secondary contact sliding spring sleeve (215), a spring (208) is installed between the floating frame B (207) and the high-voltage plug B (209), and a top end sliding spring sleeve (218) is installed at the other end of the floating frame B (207), and a top end sliding spring (219) is arranged in the top end sliding spring sleeve (218), the top end sliding spring sleeve (218) is fixed through a sliding spring pressing cap (220), the sliding spring pressing cap (220) is connected with the end part of the floating frame B (207) through threads, and the sliding spring pressing cap (220) is fixed on the inner wall of the top end pressing cap (206) through a sealing ring.

2. An electrical signal connection device for underwater high pressure environments according to claim 1, wherein: the insulating sleeve A (107) is conical.

3. An electrical signal connection device for underwater high pressure environments according to claim 1, wherein: the insulating sleeve B (109) is cylindrical.

4. An electrical signal connection device for underwater high pressure environments according to claim 1, wherein: the high-pressure plug A (115) and the high-pressure plug C (211) are three-needle high-pressure plugs.

5. An electrical signal connection device for underwater high pressure environments according to claim 1, wherein: the high-pressure plug B (209) is a single-needle high-pressure plug.

6. An electrical signal connection device for underwater high pressure environments according to claim 1, wherein: the insulating sleeves B (109) are 2 groups.

7. An electrical signal connection device for underwater high pressure environments according to claim 1, wherein: the male end-secondary contact (108) is 2 groups.

8. An electrical signal connection device for underwater high pressure environment according to claim 1 or 6 or 7, characterized in that: the insulating sleeve B (109) and the male-end secondary contact (108) are alternately assembled.