CN112993689A

CN112993689A - Underground measuring tool and electric connector thereof

Info

Publication number: CN112993689A
Application number: CN202110176896.9A
Authority: CN
Inventors: 药晓江; 丁元皓; 尚捷; 卢华涛; 李辉; 罗玉霖; 王清华; 姜东�; 崔爱贞; 孙宝阳
Original assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Current assignee: China Oilfield Services Ltd; China National Offshore Oil Corp CNOOC
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-06-18
Anticipated expiration: 2041-02-07
Also published as: CN112993689B

Abstract

A downhole measurement tool and an electrical connector therefor, the electrical connector comprising a first connection assembly comprising an insulating sleeve configured in a cylindrical shape; the conducting ring is sleeved outside the insulating sleeve; the second connecting assembly comprises a first insulating seat, a second insulating seat and a third connecting assembly, wherein the first insulating seat is arranged on the outer side of the conducting ring, a straight channel is arranged inside the first insulating seat, and one end of the channel is provided with an opening facing the conducting ring; the conductive block is arranged in the straight channel and can slide along the straight channel, and one end of the conductive block can extend out of the opening; and the elastic piece is arranged in the first insulating seat and is used for applying elastic force close to the conductive ring to the conductive block. The electric connector has simple structure and is easy to produce and maintain.

Description

Underground measuring tool and electric connector thereof

Technical Field

The present invention relates to petroleum engineering technology, and is especially one kind of underground measuring tool and its electric connector.

Background

During drilling, downhole tools while drilling are used to measure various data. Every instrument sets up in a nipple joint alone in the underground, for example engineering parameter measurement nipple joint, formation parameter measurement nipple joint, power supply nipple joint in the pit, directional well nipple joint etc. these nipple joints connect into the instrument cluster in the pit in proper order. And a hydroelectric generator is arranged in the underground power supply nipple and used for supplying power to other underground instruments.

A string of downhole tools is typically provided with a line connecting each downhole tool. The line can transmit electric power and communication signals between instruments.

Subs typically include downhole tools, mounting frames, and drill collars. The drill collar is cylindrical, and the installation framework and the underground instrument are arranged in the drill collar. The mounting framework is fixed on the inner wall of the drill collar, and the underground instrument is fixed on the mounting framework.

The drill collars of two adjacent short sections are connected together through threads, and the two drill collars are communicated through a radial sliding ring or an axial sliding ring. Meanwhile, the circuit connection between the installation framework and the drill collar is realized through a radial slip ring or an axial slip ring. The axial slip ring and the radial slip ring are complex in structure, the processing technology is difficult to maintain and repair when in use.

Disclosure of Invention

The application provides an electric connector which is simple in structure and easy to produce and maintain. The electrical connector includes:

a first connecting component comprising

An insulating sleeve configured in a cylindrical shape;

the conducting ring is sleeved outside the insulating sleeve;

a second connecting assembly comprising

A first insulating seat arranged at the outer side of the conducting ring and internally provided with a straight channel, wherein the first insulating seat is provided with a first through hole

One end of the channel is provided with an opening facing the conductive ring;

the conductive block is arranged in the straight channel and can slide along the straight channel, and one end of the conductive block can extend out of the opening;

and the elastic piece is arranged in the first insulating seat and is used for applying elastic force close to the conductive ring to the conductive block.

The first connection assembly is mounted to the first barrel having a small diameter and electrically connects the cable within the first barrel to the conductive ring. And mounting the second connecting assembly on the second cylinder with the larger diameter, and electrically connecting the cable in the second cylinder with the conductive block. When the first cylinder body is inserted into the second cylinder body, the conductive block is tightly pressed on the conductive ring under the action of the elastic force exerted by the elastic piece, and the conductive ring and the conductive block form stable electric connection, so that cables in the first cylinder body and the second cylinder body are communicated. Compared with the existing radial sliding ring and axial sliding ring, the electric connector has the advantages of simpler structure, smaller production difficulty and simpler maintenance and repair.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.

Drawings

The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not limit the disclosure.

FIG. 1 is a schematic front view of a downhole measurement tool in an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view taken along plane A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at D;

FIG. 5 is an enlarged view of a portion of FIG. 2;

FIG. 6 is a schematic cross-sectional view taken along plane C-C of FIG. 2;

fig. 7 is a partial enlarged view at E in fig. 6.

Detailed Description

As shown in fig. 1, 2, fig. 1, 2 show a downhole measurement tool 1. Such a downhole measuring tool 1 comprises a first part 3, a second part 2 and an electrical connector 4. The first component 3 and the second component 2 may be an instrument-mount skeleton and a drill collar, respectively. The first part 3 comprises a first cylinder 31. The second part 2 comprises a second cylinder 21. The first cylinder 31 and the second cylinder 21 are both cylinders. The outer diameter of the first cylinder 31 is smaller than the inner diameter of the second cylinder 21. The second cylinder 21 is fitted around the first cylinder 31. The first cylinder 31 and the second cylinder 21 are coaxially disposed. The outer diameter of the first cylinder 31 is smaller than the inner diameter of the second cylinder 21. A first cable (not shown) may be disposed within first barrel 31. A second cable (not shown) may be disposed within the second barrel 21. The electrical connector 4 is used to electrically connect the first cable in the first barrel 31 and the second cable in the second barrel 21.

As shown in fig. 3, 4 and 5, the first cylinder 31 is provided with an installation groove 521. The mounting groove 521 is formed by radially inwardly recessing the outer circumferential surface of the first cylinder 31. The mounting groove 521 is annular and is disposed coaxially with the first cylinder 31. A first wire passage 311 is provided in a side wall of the first cylinder 31. The first wire passage 311 may extend in an axial direction of the first cylinder 31. The first wire passage 311 extends to the bottom of the mounting groove 521. A communication hole 312 is formed between the first wire passage 311 and the mounting groove 521, and opposite ends of the communication hole 312 are respectively communicated with the mounting groove 521 and the first wire passage 311.

As shown in fig. 2 and 5, the second cylinder 21 is provided with a mounting hole 212. The mounting hole 212 radially penetrates the side wall of the second cylinder 21. The inward end of the mounting hole 212 is aligned with the mounting groove 521 of the first cylinder 31. A second wire passage 211 is further disposed in the second cylinder 21. The second wire passage 211 may extend in the axial direction of the second cylinder 21. One end of the second wire passage 211 extends to the mounting hole 212 and communicates with the mounting hole 212.

As shown in fig. 4, the electrical connector 4 includes a first connection assembly 6 and a second connection assembly 5. A first connection assembly 6 is provided on the first part 3 and a second connection assembly 5 is provided on the second part 2. The first connection assembly 6 comprises an insulating sleeve 51 and a conductive ring 52. The insulating sleeve 51 is cylindrical. The insulating sheath 51 may be made of an insulating material such as plastic, rubber, ceramic, mica, etc. The insulating sleeve 51 is fitted over the first cylinder 31. The insulating bush 51 is fitted into the mounting groove 521. The insulating sleeve 51 has a through hole. The through hole communicates with the communication hole 312 of the first cylinder 31. The conductive ring 52 is circular. The conductive ring 52 is a good conductor. The conductive ring 52 may be made of a metal material, such as aluminum, copper, silver, iron, and alloys thereof. The conductive ring 52 is fitted over the insulating sleeve 51. The insulating sleeve 51 separates the conductive ring 52 from the first cylinder 31.

The second connecting assembly 5 includes a first insulating base 61, a second insulating base 62, a first pad 65, a second pad 66, a conductive block 63, and a resilient member 64. The first insulating base 61, the second insulating base 62, the conductive block 63 and the elastic member 64 are disposed in the mounting hole 212 of the second cylinder 21. The first insulating base 61 and the second insulating base 62 are made of insulating materials, such as plastic, ceramic, mica, and the like.

The first insulating base 61 is fixed in the mounting hole 212. The first insulator base 61 has a straight channel 611. The straight channel 611 extends in the radial direction of the second cylinder 21 and also in the radial direction of the conductive ring 52. One end of the straight channel 611 faces the conductive ring 52 and the end of the straight channel 611 facing the conductive ring 52 has an opening 612. The second insulating holder 62 is disposed in the straight channel 611 at an end of the straight channel 611 facing away from the opening 612. The second insulating base 62 is fixedly connected with the first insulating base 61. The second insulating base 62 and the first insulating base 61 may be connected by screws.

The first pad 65, the second pad 66, the conductive block 63, and the elastic member 64 are disposed in the straight channel 611. The conductive block 63 is a good conductor, and the conductive block 63 may be made of metal. The conductive block 63 is in clearance fit with the straight channel 611. The conductive block 63 can slide along the straight channel 611. One end of the conductive block 63 protrudes from the opening 612 through the through channel 611. One end of the conductive block 63 extending out of the straight channel 611 abuts against the conductive ring 52.

The first block 65 includes a washer 651. The washer 651 is annular. The washer 651 and the second pad block 66 of the first pad block 65 are disposed between the conductive block 63 and the second insulating block 62. The first pad 65 abuts on one end of the conductive block 63 facing the second insulating base 62. The first pad 65 can follow the conductive block 63. The second pad 66 abuts against one end of the second insulating base 62 facing the conductive block 63. The elastic member 64 may be a compression spring or a disc spring. One end of the elastic member 64 abuts against the first pad 65, and the other end of the elastic member 64 abuts against the second pad 66. The resilient member 64 is in a compressed state. The elastic member 64 applies an elastic force to the conductive block 63 via the first pad 65 to approach the conductive ring 52.

The conductive block 63 is pressed against the conductive ring 52 after receiving the elastic force, thereby achieving reliable electrical connection between the conductive block 63 and the conductive ring 52.

One end of the first cable may extend into the mounting groove 521 along the first wire passage 311 and the communication hole 312 and be connected with the conductive ring 52. One end of the second cable passes through the second wire passage 211 into the mounting hole 212 and is electrically connected to the conductive block 63. Thus, the first cable in the first barrel 31 and the second cable in the second barrel 21 are electrically connected to each other through the electrical connector 4. When the first cylinder 31 and the second cylinder 21 are assembled together, the conductive ring 52 can be contacted with the conductive block 63 only by inserting the first cylinder 31 into the second cylinder 21, so that the installation is convenient.

In one exemplary embodiment, the conductive block 63 is further provided with an electrical post 632. The electrical post 632 and the conductive block 63 may be integrally formed structures. Electrical posts 632 are good conductors. The electric connecting column 632 is in a straight bar shape. Electrical posts 632 extend from the middle of the end of conductive block 63 facing away from opening 612 in a direction facing away from opening 612. The electric post 632 extends in the same direction as the straight channel 611.

The second pad block 66 is ring-shaped, and a through hole is formed in the middle of the second pad block 66. The middle of the second insulating base 62 is provided with a through hole. The electric connection post 632 passes through the through holes of the gasket 651, the second cushion block 66 and the second insulating base 62 in sequence. The end of the electrical post 632 extending out of the second insulator base 62 may be used to connect a first cable.

In an exemplary embodiment, conductive block 63 is also provided with a conductive contact 631. Conductive contact 631 is disposed at an end of conductive block 63 facing conductive ring 52. The conductive contacts 631 may be made of a copper alloy or a silver-based alloy. The conductive contact 631 may be provided in plurality. The plurality of conductive contacts 631 each abut against an outer peripheral surface of the conductive ring 52.

In an exemplary embodiment, the first block 65 further includes a sleeve 652. The sleeve 652 may be a right circular cylinder. The sleeve 652 is fitted over the electrical post 632 and has one end attached to the washer 651 of the first spacer 65. The other end of the sleeve 652 extends through the second spacer 66 into the through hole of the second insulator seat 62. The elastic member 64 is fitted over the sleeve 652. In this way, the elastic member 64 is constrained to only extend and retract along the sleeve 652.

In an exemplary embodiment, as shown in FIG. 5, the insulating sleeve 51 is provided with a first annular groove 511. The first annular groove 511 is formed by an outer circumferential surface of the insulating sleeve 51 being depressed inward. The first annular groove 511 is disposed coaxially with the insulating sleeve 51. The cross-section of the first annular groove 511 may be rectangular. The conductive ring 52 is embedded in the first annular groove 511.

The conductive ring 52 is covered by the insulating sleeve 51 except the outer peripheral surface of the conductive ring, so that the conductive ring 52 and the first cylinder 31 can be further isolated from each other to prevent electric leakage.

In an exemplary embodiment, the conductive ring 52 is further provided with a second annular groove 521. The second annular recess 521 is formed by an outer circumferential surface of the conductive ring 52 being recessed inward. The second running groove is arranged coaxially with the conductive ring 52. The conductive contact 631 is recessed within the second annular recess 521 and the conductive contact 631 abuts a bottom surface of the second annular recess 521.

In an exemplary embodiment, the first insulating base 61 is further provided with a radially protruding connection portion 633. The connection portion 633 may be provided in a ring shape. The mounting hole 212 of the second cylinder 21 is a stepped hole. One end of the connecting portion 633 abuts against the hole shoulder. The connecting part 633 is connected with the hole shoulder by a screw. Thus, the first insulating holder 61 can be stably mounted to the second cylinder 21.

In an exemplary embodiment, as shown in fig. 5 and 6, the first component 3 further comprises an insulating cylinder 32 and a mounting screw 33. The first cylinder 31 is provided with an axially extending threaded hole. The insulating sleeve 51 is provided with a first through hole 522. The first through hole 522 and the screw hole are aligned with each other. The conductive ring 52 is further provided with a second through hole 512. The second through hole 512 may be a stepped hole with a small diameter section of the second through hole 512 proximate to the first through hole 522 of the conductive ring 52. The second through hole 512 and the first through hole 522 are aligned with each other. The insulating cylinder 32 has a cylindrical shape. The insulation tube 32 passes through the first through hole 522 and the second through hole 512 in sequence. The diameter of the nut of the mounting screw 33 is larger than the diameter of the small-diameter section of the second through hole 512 and smaller than the diameter of the large-diameter section of the second through hole 512, the mounting screw 33 penetrates through the insulating cylinder 32 and is screwed into the screw hole, and the nut of the mounting screw 33 abuts against the hole shoulder of the second through hole 512. The mounting screw 33 connects the first cylinder 31, the insulating sleeve 51 and the conductive ring 52 together. The insulating cylinder 32 separates the conductive ring 52 from the mounting screw 33 to prevent leakage of electricity from the conductive ring 52.

In an exemplary embodiment, as shown in fig. 4, the second component 2 further comprises a sealing cover 22. The sealing cover 22 is of a generally plate-like configuration. The sealing cap 22 is attached to the second cylinder 21. The sealing cover 22 covers an end of the mounting hole 212 facing away from the conductive ring 52 and seals the mounting hole 212. Thus, the fluid outside the second cylinder 21 is blocked outside the seal cap 22 and is difficult to enter the mounting hole 212.

It will be appreciated that the first component 3 and the second component 2 are not limited to the applications described in the above embodiments, and that the first component 3 and the second component 2 may also be two drill collars that are threaded into each other, and the electrical connector 4 may connect cables in the two drill collars.

The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.

The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive concept as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not to be restricted except in light of the attached claims and their equivalents. Further, various modifications and changes may be made within the scope of the appended claims.

Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.

Claims

1. An electrical connector, comprising:

a first connecting component comprising

An insulating sleeve configured in a cylindrical shape;

the conducting ring is sleeved outside the insulating sleeve;

a second connecting assembly comprising

The first insulating seat is arranged on the outer side of the conducting ring, a straight channel is arranged in the first insulating seat, and one end of the channel is provided with an opening facing the conducting ring;

2. The electrical connector of claim 1, wherein the through channel extends in a radial direction of the conductive ring.

3. An electrical connector as claimed in claim 1 wherein the end of the conductive block facing the conductive ring is provided with a conductive contact which abuts the conductive ring.

4. The electrical connector of claim 1, further comprising a second dielectric holder, a first spacer and a second spacer;

the second insulating seat is fixed at one end of the straight channel, which is far away from the opening;

the first cushion block comprises

The gasket is arranged in the straight channel and is abutted against one end, facing the second insulating seat, of the conductive block;

the second cushion block is arranged in the straight channel and is abutted against the second insulating seat;

and two opposite ends of the elastic piece are respectively abutted to the gasket and the second cushion block.

5. The electrical connector of claim 4, wherein the second insulating base and the second pad are provided with through holes at the middle portions thereof;

the conductive block is also provided with an electric connecting post, and the electric connecting post extends towards the second insulating seat from one end of the conductive block towards the second insulating seat;

the electric connecting column sequentially penetrates through the second cushion block and the through hole of the second insulating seat;

the first cushion block further comprises a sleeve connected with the gasket, the sleeve is sleeved on the electric connecting column and sequentially penetrates through the second cushion block and the through hole of the second insulating seat;

the elastic piece is sleeved on the sleeve.

6. The electrical connector of claim 4, wherein the outer peripheral surface of the insulating sleeve is recessed inwardly to form a first annular groove, the first annular groove being disposed coaxially with the insulating sleeve;

the conductive ring is embedded in the first annular groove.

7. The electrical connector of claim 3, wherein the outer peripheral surface of the conductive ring is recessed inwardly to form a second annular groove, the second annular groove being disposed coaxially with the conductive ring;

the conductive contact is abutted against the bottom surface of the second annular groove.

8. A downhole measurement tool comprising an electrical connector according to any of claims 1 to 7.

9. The downhole measurement tool of claim 8, further comprising:

the first component comprises a first cylinder, wherein the outer peripheral surface of the first cylinder is inwards sunken to form an annular mounting groove which is coaxial with the first cylinder;

the second component comprises a second cylinder body, and the second cylinder body is provided with a mounting hole which radially penetrates through the second cylinder body and one end of which is aligned with the mounting groove;

wherein, insulating cover suit is in on the first barrel and be located in the mounting groove, second coupling assembling installs in the mounting hole, first insulator seat with the second barrel links to each other.

10. The downhole measurement tool of claim 9, wherein the first component further comprises a mounting screw and an insulating cylinder sleeved over the mounting screw,

the mounting screw is used for connecting the first cylinder body, the insulating sleeve and the conducting ring, and the insulating cylinder is used for separating the conducting ring from the mounting screw.