CN219286811U - Underground instrument connecting device capable of being butted at any circumferential angle - Google Patents

Abstract

The utility model provides a connection device for downhole instruments that can be docked at any circumferential angle, which includes a main body drill collar, a sensor is arranged inside the main body drill collar, and a main thread of the main body drill collar is arranged at the outer end of the main body of the drill collar. The outer end of the male thread of the main body drill collar is provided with a circuit cabin connected to the sensor; the sleeve type drill collar is connected with the main body drill collar, and one end of the sleeve type drill collar is provided with a The female thread matched with the screw thread, the other end is provided with a circular connector, and the circular connector is connected with other lower-end instruments; wherein, the outer end of the circuit cabin is provided with an arbitrary angle docking connector, and the circuit cabin The lead wire of the main body is connected to the circular connector through the butt connector at any angle, and when the male thread of the drill collar of the main body is rotated and disassembled with the female thread, the butt connector at any angle is always in a connected state .

Description

A downhole instrument connection device capable of docking at any circumferential angle

technical field

The utility model relates to a downhole instrument connecting device which can be docked at any circumferential angle, and belongs to the field of petroleum drilling engineering.

Background technique

In recent years, tools while drilling in the field of petroleum drilling engineering have gradually become a popular drilling technology and a key technology for efficient drilling.

A large part of the instrument while drilling is installed on the drill collar. One of the structures (as shown in Figure 1) is to process a male thread at one end along the axis of the main drill collar, and a circuit cabin is processed on the outside of the male thread. A sensor is installed on the main body drill collar inside the male thread. Several circuit compartment grooves are processed in the circumferential direction of the circuit cabin body outside the male thread, and the circuit cabin groove is connected with the sensor inside the male thread through the wire hole of the drill collar of the body, and the wire is drawn out from the outer end surface of the circuit cabin groove.

As part of the instrument while drilling, the main drill collar needs to be connected to other drill collars, and the wires in the circuit compartment need to be connected to the wires of other drill collars. In order to be able to connect with other drill collars, a sleeve drill collar with a female thread is required. The other end of the sleeve drill collar can be a male thread or a female thread. Connector, the connector has wires, and the wires are connected to the wires on the outer end surface of the circuit compartment groove of the main drill collar through the long holes along the axis of the drill collar. At this wire connection, the sleeve drill collar is opened in the radial direction. There is a wiring groove, and the wiring groove communicates with the deep and long hole for passing the line, and communicates with the outer end surface of the main body drill collar circuit cabin groove. In addition, in order to ensure the tightness of the instrument, a metal pressure sleeve is installed on the axially outer side of the drill collar circuit cabin of the main body. There are two sealing surfaces on the metal pressure sleeve, and an O-ring is installed in the sealing groove of the sealing surface. , these two sealing surfaces are respectively in contact with the corresponding sealing surfaces of the main body drill collar and the sleeve drill collar to isolate the mud for sealing.

At the junction groove, there are wires protruding from the outer end surface of the main drill collar circuit tank, and wires protruding from the deep and long hole of the sleeve drill collar. The two wires need to be electrically connected. Generally, this electrical connection is realized through wires or connectors.

Since the female thread of the sleeve drill collar and the male thread of the main drill collar need to be tightened with a fastening machine after docking, the outlet hole on the outer end surface of the circuit tank of the main drill collar and the wiring groove of the sleeve drill collar cannot be docked each time In addition, it is difficult to ensure that the above-mentioned outlet holes and wiring grooves are at the same position during processing, and the cost is high; thirdly, the main drill collar and the sleeve drill collar that are butted together It is not used in one-to-one matching, and each drill collar is required to be interchangeable, so it is more difficult to ensure that the outlet hole and the wiring groove are in the same position. Therefore, in theory, the angle formed by the straight line formed by the outlet hole and the center of the drill collar and the plane where the wiring groove is located (referring to the plane formed by the centerline of the wiring groove along the axial direction of the drill collar and the axis of the drill collar) is between 0° and 180° °. Therefore, the general electrical connector cannot realize the electrical connection at the junction slot.

The conventional method is to directly connect wires by welding. The specific method is: put the wire on the outer end surface of the circuit tank of the drill collar body on the protective tube, and reserve a sufficient length, push the sleeve type drill collar from the outside of the male thread of the drill collar body, and tighten it along the thread. In the inner hole at the other end of the sleeve-type drill collar, the wire is led out from the inside of the drill collar through the junction groove, and the wire is arranged in an arc shape, and the metal pressure sleeve is installed along the axis. In the wire groove, the wire of the drill collar body and the wire of the sleeve drill collar are connected by welding.

The disadvantage of this method is that the welding points need to be disconnected every time the wire welding is disassembled. Since the welding points cannot be reused, the welding points need to be cut off in the next assembly, so that the sleeve type When the wires in the deep and long holes of the drill collars are not long enough, it is necessary to replace the ring connector and the wires on the end face of the sleeve drill collar, which is laborious and laborious, and increases the cost; at the same time, in order to make the wires of the two drill collars vibrate downhole It is not damaged in the environment, it is necessary to use colloid to fix the wires at the junction slot, and the colloid needs to be removed during maintenance, which is very easy to damage the wires; in addition, you need to be very careful when installing the metal compression sleeve, otherwise the compression sleeve will be damaged In the case of the wire, the wire squeezed into the sealing surface of the metal gland will also cause damage to the sealing surface. When this happens, the instrument can only be processed and maintained, which affects work efficiency.

Utility model content

Aiming at the above-mentioned technical problems existing in the prior art, the utility model proposes a downhole instrument connection device that can be docked at any circumferential angle, which can realize electrical connection at any angle during the relative rotation docking process during installation, and improves the docking efficiency. Convenience, reliability and security.

The utility model proposes a downhole instrument connection device that can be docked at any circumferential angle, including:

The main body drill collar, the sensor is arranged inside the main body drill collar, the outer end of the drill collar main body is provided with the main body drill collar male thread, and the outer end of the main body drill collar male thread is provided with a circuit cabin connected to the sensor;

The sleeve type drill collar connected to the main body drill collar, one end of the sleeve type drill collar is provided with a female thread matching the male thread of the main body drill collar, and the other end is provided with a ring connector. Type connectors are connected to other lower-end instruments;

Wherein, the outer end of the circuit cabin is provided with a butt connector at any angle, and the wires of the circuit cabin are connected to the circular connector through the butt connector at any angle, and are connected to the main body drill collar. When the thread and the female thread are rotated and disassembled, the butt connector at any angle is always in a connected state.

A further improvement of the utility model is that the butt connector at any angle includes a half-ring connection assembly connected to the end of the circuit cabin, and a crimping connector connected to the circular connector; The ring connection assembly is connected with the crimping connector through a circular inclined coil spring.

A further improvement of the utility model is that the half-ring connection assembly includes a half-ring connection base connected to the circuit cabin, the half-ring connection base is provided with a coaxial connector female head, and the circuit The cabin body is provided with a coaxial connector male head, and the coaxial connector male head is connected to the coaxial connector female head;

A half-ring connector is arranged on the half-ring connection base, and the half-ring connector is connected to the canted coil spring.

A further improvement of the present utility model is that a first ring platform and a second ring platform are provided on the half-ring connection base, and a ring-shaped platform is formed between the first ring platform and the second ring platform to accommodate the half-ring platform. connectors and mounting slots for said canted coil springs;

The half-ring connector includes two semi-circular half-ring connector units, and the two half-ring connector units are fixed by O-rings after they are docked.

A further improvement of the utility model is that the half-ring connector unit includes a half-ring insulating base, and conductive metal is arranged on the half-ring insulating base, and the conductive metal leads out of the half-ring connector to be weldable. The ring connector solderable nipple is soldered to the coaxial connector female head.

A further improvement of the utility model is that a protruding structure is provided on one side of the half-ring connector, and a groove structure matching the protruding structure is provided on the first annular platform.

The further improvement of the utility model is that, the outer wall of the sleeve type drill collar is provided with a wiring groove, and a deep and long hole for passing the line is arranged between the wiring groove and the ring connector at the end; the ring type Connecting wires between the connector and the crimping connector are installed in the wiring groove and the deep long hole for passing wires.

A further improvement of the utility model is that the crimping connector includes a crimping connector insulating base, and the inside of the crimping connector insulating base is provided with a crimping connector conductive metal, and the crimping connector conductive metal The upper end is provided with a crimping connector which can be welded to connect with the connecting wire, and the lower end is provided with a crimping part in contact with the canted coil spring.

The further improvement of the utility model lies in that threaded holes are provided on both sides of the insulating base, and through holes are provided on the wiring groove; compression screws are provided in the through holes, and the compression screws pass through the the through hole and into the threaded hole.

A further improvement of the utility model is that the half-ring insulating matrix and the crimping connector insulating matrix are formed by injection extrusion of PEEK material.

Compared with the prior art, the utility model has the advantages of:

The downhole instrument connection device described in the utility model, which can be docked at any circumferential angle, can be connected with a crimping connector and a canted coil spring at any circumferential angle after the sleeve type drill collar is tightened with the main body drill collar. Realize electrical connection, solve the problem that traditional connectors cannot realize electrical connection here.

In the downhole instrument connection device described in the utility model, which can be docked at any circumferential angle, the use of half-ring connectors, inclined coil springs and crimping connectors can avoid the risk of unreliable electrical connection caused by repeated welding of wires and removal of colloids. .

In the downhole instrument connection device described in the utility model, which can be docked at any circumferential angle, the electrical connection and disconnection can be realized by installing and dismounting M4 screws, avoiding the gradual shortening of the wires caused by repeated welding, and increasing the length of each connector. service life. In addition, when using the wire welding method, you need to be very careful when installing the metal gland, otherwise the wire will be damaged by the gland. In addition, the wire squeezed into the sealing surface of the metal gland will also cause damage to the sealing surface. Use a half-ring The type connector avoids this situation and ensures the communication reliability of the instrument and the safety of downhole work.

Description of drawings

Preferred embodiment of the present utility model will be described in detail below in conjunction with accompanying drawing, in the figure:

Fig. 1 is the structural representation of the electrical connection mode of the instrument while drilling in the prior art;

Fig. 2 is a structural schematic diagram of a downhole instrument connection device that can be docked at any circumferential angle according to an embodiment of the present invention;

Fig. 3 is a structural schematic diagram of a half-ring connection assembly of an embodiment of the present invention;

FIG. 4 is a schematic structural view of a crimp connector according to an embodiment of the present invention;

In the figures, the same parts are given the same reference numerals.

The figures are not drawn to scale.

The meaning of each reference sign in the accompanying drawings is as follows:

100. Drill collar of main body, 110. Male thread of drill collar of main body, 120. Circuit compartment body, 130. Circuit compartment slot, 200. Sleeve type drill collar, 210. Ring connector, 220. Deep long hole for passing wire, 230 , Wiring groove, 300, metal compression sleeve, 310, metal compression sleeve large O-ring, 320, metal compression sleeve small O-ring, 330, wire, 400, half-ring connection assembly, 410, half-ring connector, 411, conductive metal, 412, conductive metal half ring part, 413, half ring connector weldable joint, 414, raised structure, 415, half ring insulating base, 420, half ring connection base, 421, first ring Taiwan, 422, second annular platform, 423, mounting groove, 424, groove structure, 430, inclined coil spring, 440, O-ring, 500, M10 screw, 610, crimping connector, 611, crimping connector Insulation base, 612, crimping connector conductive metal, 613, crimping part, 614, crimping connector weldable joint, 615, connecting wire, 620, compression screw, 710, coaxial connector female head, 720, Coaxial connector male.

Detailed ways

In order to make the technical solutions and advantages of the present utility model clearer, the exemplary embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part of the embodiments of the present invention, rather than exhaustive of all the embodiments. And in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

Fig. 2 schematically shows a downhole instrument connection device according to the utility model which can be docked at any circumferential angle, including: a main body drill collar 100, a sensor is arranged inside the main body drill collar 100, and a sensor is arranged at the outer end of the drill collar main body A main body drill collar male thread 110 is provided, and a circuit cabin 120 is provided outside the end of the main body drill collar male thread 110 . Several circuit cabin grooves 130 are processed in the circumferential direction of the circuit cabin body 120. The circuit cabin grooves 130 are connected with the sensors of the main body drill collar 100 through the wire passing holes of the main body drill collar 100, and lead wires are drawn out from the outer end surface of the circuit cabin groove 130.

The sleeve drill collar 200 is connected to the main drill collar 100 . One end of the sleeve drill collar 200 is provided with a female thread, and the female thread is matched with the male thread 110 of the drill collar of the main body. The other end of the sleeve drill collar 200 is provided with a circular connector 210, and the circular connector 210 is connected with other lower-end instruments.

Wherein, the outer end of the circuit cabin body 120 is provided with an arbitrary angle docking connector, and the wires of the circuit cabin body 120 are connected to the ring-type connector 210 through the arbitrary angle docking connector, and are connected to the main body When the male thread 110 of the drill collar is rotated and disassembled from the female thread, the butt connector at any angle is always in a connected state, and the sensor and the lower end instrument can be electrically connected at any angle on the circumference.

In one embodiment, the butt connector at any angle includes a half-ring connection assembly 400 connected to the end of the circuit compartment 120, and a crimp connector 610 connected to the ring connector 210; The half-ring connection assembly 400 is also provided with a beveled coil spring 430 , and the half-ring connection middle car is connected with the crimping connector 610 through the circular beveled coil spring 430 .

In the downhole tool connecting device that can be docked at any circumferential angle according to this embodiment, when the main body drill collar 100 and the sleeve type drill collar 200 are connected, they rotate with each other so that the female thread and the main body drill collar male thread 110 are butted. During the process, the canted coil spring 430 has a circular elastic structure, which can make the docking connector at any angle complete the docking at any angle when rotating.

In one embodiment, the half-ring connection assembly 400 includes a half-ring connection base 420 connected to the circuit compartment 120, the half-ring connection base 420 is provided with a coaxial connector female head 710, The circuit cabin body 120 is provided with a coaxial connector male head 720, and the coaxial connector male head 720 is connected with the coaxial connector female head 710; the coaxial connection female head is provided with a connecting circuit cabin body 120 connecting wires 615. A half-ring connector 410 is disposed on the half-ring connection base 420 , and the half-ring connector 410 is connected to the canted coil spring 430 .

The ring connection assembly is connected to the outer end of the circuit compartment 120 through a coaxial connection female and a coaxial connection male.

In one embodiment, the half-ring connection base 420 has a cylindrical or ring-shaped structure as a whole, and the outer diameter of the side where the coaxial connection female head is provided is larger, and the outer diameter of the other side is smaller. The side with the smaller outer diameter is provided with two annular bosses along the circumference, which are respectively the first annular boss 422 and the second annular boss. A mounting groove 423 is formed between the first annular platform 422 and the second annular platform, and the installation groove 423 is used for receiving the half-ring connector 410 and the canted coil spring 430 .

The coaxial connector female head 710 is connected and fastened to the half-ring connection base 420 through threads, and the half-ring connection base 420 is fastened to the outer end surface of the circuit compartment groove 130 of the drill collar body by 3 or more M10 screws At the same time, the coaxial connector male 720 on the outer end surface of the drill collar body circuit compartment groove 130 will be connected to the coaxial connector female 710 on the half-ring connection base 420 .

In this embodiment, the half-ring connector 410 includes two semi-circular half-ring connectors 410 units, and the two half-ring connectors 410 units are fixed by an O-ring 440 after being connected.

During installation, buckle the two half-ring connector units 410 in the installation groove 423 , close to one side of the first ring platform 422 , and place the canted coil spring 430 on the other side. After buckling the two half-ring connectors 410 units, the two half-ring connectors 410 are connected through the O-ring 440 .

In one embodiment, the half-ring connector unit 410 includes a half-ring insulating base 415 , and a conductive metal 411 is disposed on the half-ring insulating base 415 . The semi-ring insulating base 415 is used as a component carrying the conductive metal 411 . The conductive metal 411 leads out a half-ring connector weldable joint 413 , and the half-ring connector weldable joint 413 is welded to the coaxial connector female head 710 .

Preferably, the conductive metal 411 may be beryllium bronze or other metals with excellent electrical conductivity, and the outer layer may be plated with silver or gold to ensure the excellent electrical conductivity of the half-ring connector 410 . The semi-ring insulating matrix 415 is made of PEEK material, which not only acts as a carrier for the conductive metal 411, but also plays an insulating role to prevent short circuit in electrical connections.

In one embodiment, a protruding structure 414 is provided on the side of the half-ring connector 410 , and a groove structure 424 matching the protruding structure 414 is provided on the first annular platform 422 . During installation, the protruding structure 414 of the half-ring connector 410 is clamped in the groove structure 424 on the first ring platform 422, which can prevent the half-ring connector 410 from rotating and moving in the downhole vibration condition, avoiding Electrical connection failed.

In one embodiment, a wiring groove 230 is provided on the outer wall of the sleeve drill collar 200, and a deep long hole 220 is provided between the wiring groove 230 and the circular connector 210 at the end; The connecting wire 615 between the ring connector 210 and the crimping connector 610 passes through the wiring groove 230 and is arranged in the wire passing deep hole 220 .

In a preferred embodiment, the crimping connector 610 includes a crimping connector insulating base 611, and the inside of the crimping connector insulating base 611 is provided with a crimping connector conductive metal 612, and the crimping connection The upper end of the conductive metal 612 is provided with a crimping connector weldable joint 614 connected to the connecting wire 615 , and the lower end is provided with a crimping part in contact with the canted coil spring 430 . Preferably, the insulating base 611 of the crimping connector is made of PEEK material, which not only serves as a carrier for the conductive metal 411 , but also plays an insulating role to prevent short circuits in electrical connections. PEEK material and conductive metal 411 can be formed by injection extrusion under suitable temperature and pressure, and then the finished product can be obtained through post-finishing.

In one embodiment, threaded holes are provided on both sides of the insulating base, and a through hole is provided on the wiring groove 230; a compression screw 620 is provided in the through hole, and the compression screw 620 passes through the through hole and into the threaded hole. Preferably, the through hole is a stepped hole, and the outer part of the stepped hole has a larger outer diameter, which can accommodate the screw head of the compression screw 620 .

During installation, connect the wiring groove 230 and the crimp connector 610 through the compression screw 620, and connect the crimp connector 610 by screwing the compression screw 620, and make it contact and compress the oblique connector 610 after assembly. The coil spring 430, because the canted coil spring 430 has a certain degree of elasticity, the crimping connector 610 and the canted coil spring 430 can always be pressed and electrically connected after the assembly is completed and during downhole work.

In this embodiment, the compression screws 620 are preferably two M4 screws.

While preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and/or modifications that fall within the scope of the present utility model, and all changes and/or modifications made according to the embodiments of the present utility model shall be included in the scope of the present utility model. within the scope of protection.

Claims (10)

1. A downhole instrument connection device that can be docked at any circumferential angle, characterized in that it includes: The main body drill collar (100), the main body drill collar (100) is provided with a sensor, the outer end of the main body drill collar is provided with a main body drill collar male thread (110), and the outer end of the main body drill collar male thread (110) The end is provided with a circuit cabin (120) connected to the sensor; A sleeve type drill collar (200) connected to the main body drill collar (100), one end of the sleeve type drill collar (200) is provided with a female thread matched with the main body drill collar male thread (110), The other end is provided with a circular connector (210), and the circular connector (210) is connected to the lower end instrument; Wherein, the outer end of the circuit cabin (120) is provided with a butt connector at any angle, and the wires of the circuit cabin (120) are connected to the circular connector (210) through the butt connector at any angle. , and when the male thread (110) of the main body drill collar is rotated and disassembled with the female thread, the butt connector at any angle is always in a connected state. 2. The downhole instrument connecting device capable of docking at any circumferential angle according to claim 1, characterized in that, the docking connector at any angle includes a half-ring connection assembly connecting the end of the circuit cabin (120) (400), and the crimping connector (610) connecting the circular connector (210); the half-ring connection assembly (400) and the crimping connector (610) pass Inclined coil springs (430) are connected. 3. The downhole instrument connection device capable of docking at any circumferential angle according to claim 2, characterized in that, the half-ring connection assembly (400) includes a half-ring connection base connected to the circuit cabin (120) seat (420), the half-ring connection base (420) is provided with a coaxial connector female (710), and the circuit cabin (120) is provided with a coaxial connector male (720), so The coaxial connector male (720) is connected to the coaxial connector female (710); The half-ring connection base (420) is provided with a half-ring connector (410), and the half-ring connector (410) is connected to the inclined coil spring (430). 4. The downhole instrument connection device capable of docking at any circumferential angle according to claim 3, characterized in that, the half-ring connection base (420) is provided with a first annular platform (422) and a second annular platform, An installation groove (423) for accommodating the half-ring connector (410) and the canted coil spring (430) is formed between the first annular platform (422) and the second annular platform; The half-ring connector (410) includes two semi-circular half-ring connector (410) units, and the two half-ring connector (410) units are butted and fixed by O-rings (440). 5. The downhole instrument connecting device capable of docking at any circumferential angle according to claim 4, characterized in that, the half-ring connector (410) unit includes a half-ring insulating base (415), and the half-ring insulating base Conductive metal (411) is arranged on (415), and described conductive metal (411) draws half ring type connector weldable joint (413), and described half ring type connector weldable joint (413) and coaxial connector female The head (710) is welded and connected. 6. The downhole instrument connecting device capable of docking at any circumferential angle according to claim 5, characterized in that, one side of the half-ring connector (410) is also provided with a protruding structure (414), and the first A groove structure (424) matched with the protruding structure (414) is arranged on an annular platform (422). 7. The downhole instrument connecting device that can be docked at any circumferential angle according to claim 5 or 6, characterized in that, a wiring groove (230) is arranged on the outer wall of the sleeve drill collar (200), and the wiring groove (230) is A deep long hole (220) is provided between the groove (230) and the circular connector (210) at the end; the connection between the circular connector (210) and the crimp connector (610) The wires (615) are installed in the wiring groove (230) and the wire-passing deep slot (220). 8. The downhole instrument connection device capable of docking at any circumferential angle according to claim 7, characterized in that, the crimp connector (610) comprises a crimp connector insulating base (611), and the crimp connector The interior of the insulating base (611) is provided with a crimping connector conductive metal (612), and the upper end of the crimping connector conductive metal (612) is provided with a crimping connector that is connected to the connecting wire (615) and can be welded The lower end of the joint (614) is provided with a crimping part in contact with the canted coil spring (430). 9. The downhole instrument connecting device that can be docked at any circumferential angle according to claim 8, characterized in that threaded holes are provided on both sides of the insulating base, and through holes are provided on the wiring groove (230); A compression screw (620) is arranged in the through hole, and the compression screw (620) passes through the through hole and enters the threaded hole. 10. The downhole instrument connecting device capable of docking at any circumferential angle according to claim 9, characterized in that, the half-ring insulating base (415) and the crimping connector insulating base (611) are injection-molded extruded PEEK materials. Compression molding.

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