CN113889791B - Rotary sliding contact type central rod conductive device - Google Patents

Abstract

The invention discloses a rotating and sliding contact type central pole conducting device, comprising a first conducting mechanism, a second conducting mechanism, a first central pole and a second central pole, the first central pole and the second central pole are detachably connected , the first central rod is provided with a mounting groove A corresponding to the first conductive mechanism, the second central rod is provided with a mounting groove B corresponding to the second conductive mechanism, and the first central rod and the second When the central rod is connected, the first conductive mechanism and the second conductive mechanism are press-fitted to form a contact connection structure. The invention can avoid contact with external drilling fluid and other fluids, and ensure good insulation; establish a stable ground and bottom-hole information and power transmission channel; improve the problem of immature cable docking, and break through the traditional drill pipe electrification Only the limitation of weak electric signal transmission can be realized, so as to realize good power and signal transmission function.

Description

A rotating and sliding contact center rod conductive device

technical field

The invention relates to the technical field of oil exploitation equipment, in particular to a rotating sliding contact type central rod conducting device.

Background technique

With the rapid development of the global economy, the demand for oil has increased significantly, and the precision and speed of drilling have become the inevitable requirements of drilling and oil production technology. As for drilling technology, the more advanced ones are logging while drilling (LWD) and measurement while drilling (MWD). With the advancement of drilling technology, more and more detectors, instruments, and sensors are used in downhole drilling technology. These devices need to consume a lot of power when they work. At present, electromagnetic waves, sound waves and Mud pulse method, but the signal transmission of electromagnetic waves attenuates very fast, and the transmission of sound waves is susceptible to interference. The transmission rate of mud pulses is too low, so it is not stable and unsuitable; the transmission of electric energy is now the most commonly used bottom-hole generators or pre-prepared batteries. , although there are also cables hanging on the inner or outer wall of the drill pipe, and the cables are cut into sections and armored in the drill pipe, but the cable-to-cable docking technology is still immature. Wear and tear, whether drilling is carried out according to the predetermined trajectory, and whether the downhole power equipment can have sufficient electric energy, it is necessary to establish a stable ground and bottom-hole information and power transmission channel.

At present, for downhole power transmission, relevant research has only been carried out on drill pipes or drill strings, whose diameter is usually greater than 100mm. The wire butt joint method can simultaneously transmit power and signals. However, there is no relevant research on the design of power and signal transmission in the center rod of the coring machine. The diameter of the center rod is usually less than 35mm, which is different from the drill rod or drill string that needs to be rotated during work. pull action, but its extremely small size constraints make power delivery in it extremely difficult.

Contents of the invention

The purpose of the present invention is to provide a rotating and sliding contact type center rod conductive device, which can realize the transmission of electric power inside the center rod, avoid contact with fluids such as drilling fluids outside, and ensure good insulation; the two conductive mechanisms follow the center rod The docking and power conduction are completed at the same time as the connection, and a stable information and power transmission channel between the ground and the bottom of the well has been established; the problem of immature cable docking has been improved, and the traditional drill pipe power-on can only realize the limitation of weak current signal transmission. Thus, good power and signal transmission functions are realized.

In order to achieve the above object, the above-mentioned rotating and sliding contact type central pole conductive device provided by the present invention includes a first conductive mechanism, a second conductive mechanism, a first central pole, and a second central pole. The first central pole and the The second central rod is detachably connected, and the first central rod is provided with a mounting groove A corresponding to the first conductive mechanism, the first conductive mechanism is installed in the mounting groove A, and the second central rod is provided with a mounting groove A corresponding to the first The installation groove B corresponding to the two conductive mechanisms, the second conductive mechanism is installed in the installation groove B, and when the first central rod is connected to the second central rod, the first conductive mechanism and the second conductive mechanism are press fit to form contact connection structure.

Preferably, the first conductive mechanism includes a tailstock A, a conductive component A, an elastic component A, a sleeve A, a sliding seat A, and a conductive component B, and the tailstock A is connected to the tail of the sleeve A to connect the sleeve The tail end of A is sealed, the sliding seat A is slidably connected with the sleeve A, the elastic component A is arranged in the cavity surrounded by the tailstock A, the sleeve A, and the sliding seat A, and the elastic component A The two ends are in contact with the tailstock A and the sliding seat A respectively, one end of the conductive component A is installed in the center of the tailstock A, and the other end of the conductive component A can move through the center of the sliding seat A ; The conductive component B includes a ring body and a rod-shaped body, the rod-shaped body is connected to the ring-shaped body, the tailstock A has a through hole at the position corresponding to the rod-shaped body, and the ring-shaped body of the conductive component B is installed On the front of the sliding seat A, the rod-shaped body of the conductive component B passes through the sliding seat A and enters the cavity surrounded by the tailstock A, the sleeve A, and the sliding seat A and can pass through the tailstock A movably. Component A and conductive component B are not electrically connected to each other.

Further, the conductive component A is in the shape of a rod, one end of the conductive component A is provided with threads, and the threaded end of the conductive component A is installed in the center of the tailstock A.

Further, a plane is provided on the outer cylindrical surface of the sleeve A, and a matching plane is provided in the installation groove A of the first central rod, forming a combined structure for positioning and anti-rotation of the first conductive mechanism.

Further, the tailstock A, the sleeve A, and the sliding seat A are all insulating materials.

Further, the elastic component A is a spring or elastic body structure.

Preferably, the second conductive mechanism includes a tailstock B, a conductive component C, an elastic component B, a sleeve B, a sliding seat B, and a conductive component D, and the tailstock B is connected to the tail of the sleeve B to connect the sleeve B The tail end is sealed, the sliding seat B is slidably connected with the sleeve B, and the elastic component B is arranged in the cavity surrounded by the tailstock B, the sleeve B, and the sliding seat B. The two elastic components B The ends are in contact with the tailstock B and the sliding seat B respectively, one end of the conductive component C is installed on the tailstock B and the distance from the axis is equal to the radius of the annular body of the conductive component B, the conductive component C The other end passes through the sliding seat B, one end of the conductive component D is installed in the center of the sliding seat B, and the other end of the conductive component D passes through the sliding seat B and enters the tailstock B, the sleeve B, and the sliding seat B Inside the enclosed cavity and through the tailstock B, the conductive component D and the conductive component C are not electrically connected to each other.

Further, the conductive component C and the conductive component D are both rod-shaped, one end of the conductive component C is provided with a thread, the threaded end of the conductive component C is installed on the tailstock B, and one end of the conductive component D is set There are threads, and the threaded end of the conductive component D is installed in the center of the sliding seat B.

Further, a plane is provided on the outer cylindrical surface of the sleeve B, and a matching plane is provided in the installation groove B of the first central rod, forming a combined structure for positioning and anti-rotation of the second conductive mechanism.

Further, the tailstock B, the sleeve B, and the sliding seat B are all insulating materials.

Further, the elastic component B is a spring or elastic body structure.

Preferably, a side hole is opened on the side of the second central rod, one end of the wire is introduced into the second central rod through the side hole to complete the connection with the conductive device, and the other end of the wire is connected to the cable.

Compared with the prior art, the present invention has the following technical effects:

1. The present invention can realize the transmission of electric power inside the central rod, avoid contact with external drilling fluid and other fluids, and ensure good insulation;

2. The two conductive mechanisms of the present invention complete the docking and power conduction while the central rod is connected, and establish a stable information and power transmission channel between the ground and the bottom of the well;

3. The present invention solves the problem of immature cable connection, breaks through the limitation that the energized drill pipe can only transmit weak current signals, and thus realizes good power and signal transmission functions.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings that are required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is the overall sectional structure schematic diagram of embodiment;

Fig. 2 is a schematic diagram of the explosion structure of the first conductive mechanism and the second conductive mechanism;

Icons: 1-tailstock A, 2-conductive component A, 3-elastic component A, 4-sleeve A, 5-sliding seat A, 6-conductive component B, 7-tailstock B, 8-conductive component C , 9-elastic component B, 10-sleeve B, 11-conductive component D, 12-sliding seat B, 13-first central rod, 14-second central rod, 15-side hole.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the application is used, or the orientation or positional relationship of this application. The orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the product of the application is usually placed when it is used, is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must be Having a particular orientation, being constructed and operating in a particular orientation, and therefore not to be construed as limiting the application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In the description of the embodiments of this application, it should also be noted that unless otherwise specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a It is a detachable connection or an integral connection; it can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

Example

A rotary-sliding contact-type central pole conducting device, comprising a first conducting mechanism, a second conducting mechanism, a first central pole 13, and a second central pole 14, the first central pole 13 and the second central pole 14 are detachable connection, the first central rod 13 is provided with a mounting groove A16 corresponding to the first conductive mechanism, the first conductive mechanism is installed in the mounting groove A16, and the second central rod 14 is provided with a mounting groove A16 corresponding to the second conductive mechanism. The installation groove B17, the second conductive mechanism is installed in the installation groove B17, when the first central rod 13 and the second central rod 14 are connected, the first conductive mechanism and the second conductive mechanism are press fit to form a contact connection structure ; The first conductive mechanism includes a tailstock A1, a conductive component A2, an elastic component A3, a sleeve A4, a sliding seat A5, and a conductive component B6, and the tailstock A1 is connected with the tail of the sleeve A4 to connect the tail of the sleeve A4 Sealed, the sliding seat A5 is slidingly connected with the sleeve A4, the elastic component A3 is arranged in the cavity surrounded by the tailstock A1, the sleeve A4, and the sliding seat A5, and the elastic component A3 is a spring or elastic body structure , the two ends of the elastic component A3 are in contact with the tailstock A1 and the sliding seat A5 respectively, one end of the conductive component A2 is installed in the center of the tailstock A1, and the other end of the conductive component A2 can move through The center of the sliding seat A5; the conductive assembly B6 includes a ring body and a rod-shaped body, the rod-shaped body is connected on the ring-shaped body, and the position of the tailstock A1 corresponding to the rod-shaped body has a through hole, and the conductive assembly The annular body of B6 is installed on the front of the sliding seat A5, and the rod-shaped body of the conductive component B6 passes through the sliding seat A5 and enters the cavity surrounded by the tailstock A1, the sleeve A4, and the sliding seat A5 and can be movably worn. Through the tailstock A1, the conductive component A2 and the conductive component B6 are not electrically connected to each other; the conductive component A2 is rod-shaped, and one end of the conductive component A2 is provided with a thread, and the threaded end of the conductive component A2 is installed on the tailstock A1. center; the outer cylindrical surface of the sleeve A4 is provided with a plane, and the mounting groove A16 of the first central rod 13 is provided with a matching plane to form a positioning and anti-rotation combined structure of the first conductive mechanism, which plays a role in positioning and Prevent the rotation of the sleeve A4 during the installation process, resulting in the failure to complete the docking of the first conductive mechanism and the second conductive mechanism; the tailstock A1, the sleeve A4, and the sliding seat A5 are all insulating materials;

The second conductive mechanism includes a tailstock B7, a conductive component C8, an elastic component B9, a sleeve B10, a sliding seat B12, and a conductive component D11. The tailstock B7 is connected to the tail of the sleeve B10 to seal the tail end of the sleeve B10. The sliding seat B12 is slidably connected to the sleeve B10, the elastic component B9 is arranged in the cavity surrounded by the tailstock B7, the sleeve B10, and the sliding seat B12, and the elastic component B9 is a spring or elastic body structure. The two ends of the elastic component B9 are respectively in contact with the tailstock B7 and the sliding seat B12, and one end of the conductive component C8 is installed on the tailstock B7 and the distance from the axis is equal to the radius of the annular body of the conductive component B6 , the other end of the conductive component C8 passes through the sliding seat B12, one end of the conductive component D11 is installed in the center of the sliding seat B12, and the other end of the conductive component D11 passes through the sliding seat B12 and enters the tailstock B7, sleeve In the cavity surrounded by the barrel B10 and the sliding seat B12 and passing through the tailstock B7, the conductive component D11 and the conductive component C8 are not electrically connected to each other; the conductive component C8 and the conductive component D11 are both rod-shaped, and the conductive component C8 One end of the conductive component D11 is provided with a thread, and the threaded end of the conductive component C8 is installed on the tailstock B7, and one end of the conductive component D11 is provided with a thread, and the threaded end of the conductive component D11 is installed in the center of the sliding seat B12; the sleeve B10 A plane is provided on the outer cylindrical surface, and a matching plane is provided in the installation groove B17 of the first central rod 14 to form a combined structure for positioning and anti-rotation of the second conductive mechanism, which plays a role in positioning and preventing slipping during installation. The rotation of the cylinder B10 makes it impossible to normally complete the docking of the first conductive mechanism and the second conductive mechanism; the tailstock B7, the sleeve B10, and the sliding seat B12 are all insulating materials; the side of the second central rod 14 is provided with a side hole 15, and the side The hole 15 is used to bury the wire and lead the wire into the second central rod, wherein one end of the wire is introduced into the second central rod 14 through the side hole 15 to complete the connection with the conductive device, the other end of the wire is connected to the cable, and the cable is connected to the For external electrical equipment connection, the side holes 15 allow the wires to be introduced from the side of the second central pole 14 and connected to external equipment through cables.

In this embodiment, the first central rod 13 and the second central rod 14 are threadedly connected, the first conductive mechanism is installed in the installation groove A16 of the first central rod 13, and the second conductive mechanism is installed in the second central rod 14 in the mounting groove B17, and then through the corresponding screw connection of the first central rod 13 and the end of the second central rod 14, when the first central rod 13 and the second central rod 14 are connected, the first conductive mechanism and the second The conductive mechanism also completes the pressing contact at the same time, so that the conductive component A2 is in contact with the conductive component D11, and the conductive component B6 is in contact with the conductive component C8. Since the contact surface of the conductive component B6 and the conductive component C8 is ring-shaped, it can be ensured. During the tightening process, the conductive component B6 can keep in contact with the conductive component C8, and the sliding seat A5 and the sliding seat B12 respectively compress the elastic component A3 and the elastic component B9 during the tightening process, so that the elastic component A3 and the elastic component B9 After the first central rod 13 and the second central rod 14 are tightened, a pre-tightening force is generated, so as to ensure the stable contact between the conductive component A2 and the conductive component D11, the conductive component B6 and the conductive component C8 after the first central rod and the second central rod are tightened Reliable, thereby establishing a stable information and power transmission channel between the ground and the bottom of the well; and also making the application of the first conductive mechanism and the second conductive mechanism not only limited to a single type of the first center rod 13 and the second center rod 14, At the same time, it is also possible to avoid affecting the contact connection between the conductive component A2 and the conductive component D11, the conductive component B6 and the conductive component C8 due to the dimensional deviation between the first central rod 13 and the second central rod 14, that is, when the outer surface of the first central rod 13 When the threaded part is longer than the length of the internal threaded part of the second central rod 14, this situation can be avoided by sliding the sliding seat A5 to squeeze the elastic component A3, and the sliding seat B12 to slide and squeeze the elastic component B9, so that the first center can be reduced. The processing accuracy of the thread length of the rod 13 reduces the processing difficulty and improves the qualified rate of the workpiece.

By opening cavities and installation grooves inside the first center rod 13 and the second center rod 14, the transmission of power inside the center rod is realized, and contact with external drilling fluids and other fluids is avoided, ensuring good insulation; the conductive component A2 It is docked with the conductive component D11, the other end of the conductive component A2 and the conductive component D11 are respectively connected to the cable, the conductive component B6 is connected to the conductive component C8, and the other end of the conductive component B6 and the conductive component C8 are respectively connected to the cable. The docking and power conduction are completed while the central rod is connected, establishing a stable ground-bottom information and power transmission channel, and improving the problem of immature cable docking, thus realizing good power and signal transmission functions.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes All changes and modifications should belong to the scope of protection of the appended claims of the present invention.

Claims (8)

1. A rotating and sliding contact type center rod conduction device, characterized in that: comprising a first conduction mechanism, a second conduction mechanism, a first center rod (13), a second center rod (14), the first center The rod (13) is detachably connected to the second central rod (14), the first central rod (13) is provided with a mounting groove A (16) corresponding to the first conductive mechanism, and the first conductive mechanism is installed in the mounting groove In A (16), the second central rod (14) is provided with a mounting groove B (17) corresponding to the second conductive mechanism, and the second conductive mechanism is installed in the mounting groove B (17), and the first When the central rod (13) is connected to the second central rod (14), the first conductive mechanism and the second conductive mechanism are press-fitted to form a contact connection structure; The first conductive mechanism includes a tailstock A(1), a conductive component A(2), an elastic component A(3), a sleeve A(4), a sliding seat A(5), and a conductive component B(6), The tailstock A (1) is connected to the tail end of the sleeve A (4) to seal the tail end of the sleeve A (4), and the sliding seat A (5) is slidably connected to the sleeve A (4), The elastic component A (3) is arranged in the cavity surrounded by the tailstock A (1), the sleeve A (4) and the sliding seat A (5), and the two ends of the elastic component A (3) are respectively connected with Tailstock A(1) and sliding seat A(5) are in contact, one end of the conductive component A(2) is installed in the center of the tailstock A(1), and the other end of the conductive component A(2) can be Actively pass through the center of the sliding seat A (5); the conductive component B (6) includes a ring and a rod, the rod is connected to the ring, and the tail seat A (1) corresponds to The position of the rod-shaped body has a through hole, and the annular body of the conductive component B (6) is installed on the front of the sliding seat A (5), and the rod-shaped body of the conductive component B (6) passes through the sliding seat A ( 5) Enter the cavity surrounded by tailstock A (1), sleeve A (4) and sliding seat A (5) and move through the tailstock A (1), conductive component A (2) and conductive Components B (6) are not electrically connected to each other; The second conductive mechanism includes a tailstock B (7), a conductive component C (8), an elastic component B (9), a sleeve B (10), a sliding seat B (12), and a conductive component D (11). The tail end of the tailstock B (7) and the sleeve B (10) is connected to seal the tail end of the sleeve B (10), and the sliding seat B (12) is slidably connected with the sleeve B (10). The elastic component B (9) is arranged in the cavity surrounded by the tailstock B (7), the sleeve B (10), and the sliding seat B (12). B(7) and sliding seat B(12) are in contact, and one end of the conductive component C(8) is installed on the tailstock B(7) and the distance from the axis is equal to that of the conductive component B(6). The radius of the body, the other end of the conductive component C (8) passes through the sliding seat B (12), one end of the conductive component D (11) is installed in the center of the sliding seat B (12), the conductive component D The other end of (11) passes through the sliding seat B (12) into the cavity surrounded by the tailstock B (7), the sleeve B (10), and the sliding seat B (12) and passes through the tailstock B (7 ), the conductive component D (11) and the conductive component C (8) are not electrically connected to each other. 2. A rotary-sliding contact type central rod conductive device according to claim 1, characterized in that: the conductive component A (2) is rod-shaped, and one end of the conductive component A (2) is provided with a screw thread , the threaded end of the conductive component A(2) is installed in the center of the tailstock A(1). 3. A rotation-sliding contact type central rod conductive device according to claim 1, characterized in that: a plane is provided on the outer cylindrical surface of the sleeve A (4), and the first central rod (13) A matching plane is provided in the mounting groove A (16) to form a combined structure for positioning and anti-rotation of the first conductive mechanism. 4. A rotating-sliding contact-type central rod conductive device according to claim 1, characterized in that: the tailstock A (1), the sleeve A (4), and the sliding seat A (5) are all Insulation Materials. 5. A rotation-sliding contact type central rod conductive device according to claim 1, characterized in that: the conductive component C (8) and the conductive component D (11) are rod-shaped, and the conductive component C One end of (8) is provided with screw thread, and the threaded end of conductive component C (8) is installed on the tailstock B (7), and one end of described conductive component D (11) is provided with screw thread, and conductive component D (11) One end with thread is installed in the center of sliding seat B (12). 6. A rotation-sliding contact type central rod conductive device according to claim 1, characterized in that: a plane is provided on the outer cylindrical surface of the sleeve B (10), and the first central rod (14) A matching plane is provided in the mounting groove B (17) to form a combined structure for positioning and anti-rotation of the second conductive mechanism. 7. A rotating and sliding contact type central rod conductive device according to claim 1, characterized in that: the tailstock B (7), the sleeve B (10), and the sliding seat B (12) are all Insulation Materials. 8. A rotating-sliding contact-type center rod conductive device according to claim 1, characterized in that: a side hole (15) is opened on the side of the second center rod (14), and one end of the wire passes through the side hole ( 15) Introduce it into the second central rod (14) to complete the connection with the conductive device, and the other end of the wire is connected with the cable.

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