Connector assembly and fishing device
By designing a connector assembly with a support base, movable retaining ring, and limiting components, the problem of the support base swinging outwards centrifugally under changes in cable tension was solved, thus achieving stability and safety of the cable connection and avoiding safety accidents.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA PETROCHEMICAL CORP
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-05
AI Technical Summary
When the cable is lifted, the cable experiences a change in tension, which causes the cable to release its own torque. This results in the cable rotating rapidly axially, causing the support of the connector assembly to swing outwards and detach from the quick connector, posing a safety risk.
A connector assembly was designed, including a support base, a movable retaining ring, and a limiting component. Through the rotational connection of the movable retaining ring and the cooperation of the limiting component, the support base is prevented from separating from the male connector under centrifugal force, thus ensuring the stability of the cable connection.
This effectively avoids safety accidents caused by the support base being thrown outward due to centrifugal force, ensures the stability and safety of the cable connection, and prevents the joint assembly from detaching.
Smart Images
Figure CN224200598U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil well fishing equipment technology, and in particular to a connector assembly and fishing device. Background Technology
[0002] Logging instruments are the core tools of well logging operations, enabling the collection of basic drilling data. Typically, logging instruments are connected to the logging host on the wellbore via cables to collect logging data. When a logging instrument becomes stuck in the wellbore, a center-through retrieval method is generally used to retrieve it. This method involves passing a cable through the center of the drill pipe, using the drill pipe to connect a retrieval tool, and lowering it into the well to retrieve the logging instrument. The cable serves to suspend the logging instrument.
[0003] In related technologies, when the cable is lifted, the change in tension causes the cable to release its own torque, resulting in rapid axial rotation of the cable. This causes the support seat of the connector assembly to be thrown outwards centrifugally and detach from the quick connector of the connector assembly, which can easily lead to safety accidents. Utility Model Content
[0004] This invention provides a connector assembly for preventing the support seat from being thrown outwards by centrifugal force when the cable is lifted.
[0005] In a first aspect, this utility model provides a connector assembly, comprising:
[0006] A quick connector, comprising a female connector and a male connector capable of connection, the female connector for connecting an surface cable and the male connector for connecting a downhole cable, wherein the downhole cable is connected to a measuring instrument;
[0007] A support base, wherein the side surface of the support base is an arc surface extending circumferentially along its own axis, the support base is provided with a first through hole extending through the support base along its axial direction, the first through hole for the male connector to pass through, and the side surface of the support base is also provided with a first notch communicating with the first through hole; and
[0008] A movable retaining ring is rotatably connected to the support base and surrounds the male connector. The movable retaining ring has a second notch. The movable retaining ring is configured to allow the opening of the second notch to coincide with or be offset from the opening of the first notch when rotated, so as to allow or prevent the male connector from leaving the first through hole through the first notch.
[0009] In some embodiments, the support base is provided with a limiting pin, and the movable retaining ring is provided with an arcuate groove. The limiting pin cooperates with the arcuate groove to allow the movable retaining ring to be rotatably connected to the support base.
[0010] In some embodiments, a retaining ring is also included around the male connector, the retaining ring being connected to the upper surface of the support base, the retaining ring having a third notch, the opening orientation of the third notch coinciding with the opening orientation of the first notch;
[0011] The fixed retaining ring has a limiting surface opposite to the upper surface of the support base, and the movable retaining ring is rotatably disposed between the upper surface of the support base and the limiting surface of the fixed retaining ring.
[0012] In some embodiments, a limiting component is also included, which is connected to the movable retaining ring and is used to limit the rotation of the movable retaining ring.
[0013] In some embodiments, the movable retaining ring is provided with a limiting hole, one end of the limiting hole penetrates the upper surface of the movable retaining ring opposite to the limiting surface, one end of the limiting component is disposed in the limiting hole, and the limiting surface is provided with a limiting groove;
[0014] The movable retaining ring rotates until the limiting groove is opposite to the limiting hole, and the other end of the limiting component extends out of the limiting hole and is embedded in the limiting groove to restrict the rotation of the movable retaining ring.
[0015] In some embodiments, the limiting component includes:
[0016] A telescopic member, one end of which is disposed within the limiting hole; and
[0017] A limiting member, which is connected to the other end of the telescopic member;
[0018] When the movable retaining ring rotates to the point where the opening of the second notch is misaligned with the opening of the first notch, the limiting groove is opposite to the limiting hole, and the telescopic member extends to push the limiting member to at least partially embed into the limiting groove, thereby restricting the rotation of the movable retaining ring.
[0019] In some embodiments, the groove wall of the limiting groove is spherical, and the limiting member is spherical.
[0020] When the movable retaining ring rotates to the point where the opening of the second notch is misaligned with the opening of the first notch, the limiting groove is opposite to the limiting hole, and the telescopic member extends to push the limiting member partially into the limiting groove to restrict the rotation of the movable retaining ring.
[0021] In some embodiments, the number of the limiting grooves is at least two, and the at least two limiting grooves are arranged circumferentially at intervals along the axis of the fixed retaining ring;
[0022] When the movable retaining ring rotates to the point where the opening orientation of the second notch coincides with or is offset from the opening orientation of the first notch, the limiting hole is respectively opposite to the two limiting grooves.
[0023] In some embodiments, the support base is provided with a handle located outside the rotation path of the movable retaining ring.
[0024] Secondly, this application also provides a salvage device, including the aforementioned joint assembly.
[0025] This application provides a joint assembly and a retrieval device, which, compared with the prior art, at least have the following advantages:
[0026] Beneficial effects:
[0027] The movable retaining ring can be rotated to a position where the opening of the second notch is misaligned with the opening of the first notch. The limiting effect of the movable retaining ring prevents the support from separating from the male connector from the side through the first notch, thus avoiding a safety accident caused by the support being thrown outward due to centrifugal force. Attached Figure Description
[0028] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.
[0029] Figure 1 This is a schematic diagram of the connector assembly provided in the embodiment of this application in the assembled state;
[0030] Figure 2 This is a schematic diagram of the support base and the fixed retaining ring provided in the embodiment of this application in the assembled state;
[0031] Figure 3 This is a schematic diagram of the structure of the movable retaining ring provided in the embodiment of this application from a first-view perspective;
[0032] Figure 4 This is a schematic diagram of the movable retaining ring provided in the embodiment of this application from a second perspective;
[0033] Figure 5 This is a schematic diagram of the fixed retaining ring provided in the embodiment of this application from the perspective of the exposed limiting surface;
[0034] Figure 6 A schematic diagram of the limiting component provided in the embodiments of this application.
[0035] Figure label:
[0036] 1-Connector assembly;
[0037] 11-Quick connector; 111-Female connector; 112-Male connector;
[0038] 12-Support base; 121-First through hole; 122-First notch; 123-Limit pin; 124-Handle;
[0039] 13-Modible retaining ring; 131-Second notch; 132-Circular arc groove; 133-Limiting hole;
[0040] 14-Fixed retaining ring; 141-Third notch; 142-Limiting groove;
[0041] 15-Limit component; 151-Telescopic component; 152-Limit component. Detailed Implementation
[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0043] In this application, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0044] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.
[0045] The technical solution of this application will be further described below with reference to specific embodiments and accompanying drawings.
[0046] This application provides a retrieval device (not shown in the figure), including a connector assembly 1 and a retrieval assembly (not shown in the figure), wherein the retrieval assembly is disposed at the bottom of the drill pipe.
[0047] The retrieval device provided in this application embodiment is suitable for through-hole retrieval operations. Through-hole refers to a cable passing through the inside of the drill pipe, with one end connected to the winch on the wellhead and the other end connected to the logging instrument downhole. The cable serves to suspend the logging instrument, preventing it from falling to the bottom of the well and creating a more complex retrieval scenario when the retrieval assembly is not retrieving it, thus increasing the difficulty of the retrieval process. After the drill pipe is lowered to the retrieval assembly to retrieve the logging instrument, the drill pipe is pulled back through the retrieval assembly to retrieve the logging instrument.
[0048] Please refer to the following: Figure 1 and Figure 2 The connector assembly 1 includes a quick connector 11, a support base 12, and a movable retaining ring 13. The quick connector 11 includes a female connector 111 and a male connector 112 that can be connected. The female connector 111 is used to connect an surface cable, and the male connector 112 is used to connect a downhole cable, wherein the downhole cable is connected to a measuring instrument. The side of the support base 12 is an arc surface extending circumferentially along its own axis. The support base 12 is provided with a first through hole 121 extending through the support base 12 axially, through which the male connector 112 passes. The side of the support base 12 is also provided with a first notch 122 communicating with the first through hole 121. The movable retaining ring 13 is rotatably connected to the support base 12 and is arranged around the male connector 112. The movable retaining ring 13 is provided with a second notch 131. The movable retaining ring 13 is configured such that when rotated, the opening orientation of the second notch 131 coincides with or is offset from the opening orientation of the first notch 122, so as to allow or prevent the male connector 112 from leaving the first through hole 121 through the first notch 122.
[0049] It should be noted that since the drill pipe is formed by connecting multiple rods in sequence, the distance the drill pipe travels down one end is approximately the same as the length of the rod being connected. Therefore, during the connection process, to ensure the cable remains inside the drill pipe, it can be artificially divided into an uphole cable and a downhole cable. One end of the uphole cable is connected to the female connector 111, and the other end is connected to the winch. One end of the downhole cable is connected to the male connector 112, and the other end is connected to the logging instrument.
[0050] When connecting the rods, the male connector 112 and the female connector 111 are separated. The winch is rotated to raise the surface cable, positioning the female connector 111 above the rod to be connected. When the rod to be connected moves above the wellbore, the winch is rotated to lower the surface cable, causing the female connector 111 to pass sequentially through the upper end and interior of the rod to be connected and extend beyond the lower end of the rod. During this process, the male connector 112 connects to the support base 12. The lateral dimension of the support base 12 is larger than the outer diameter of the rod, allowing the support base 12 to rest on the upper end of the rod located in the wellbore, thus suspending the logging instrument during this process.
[0051] Then, the female connector 111 extends out from the lower end of the rod to be connected and connects with the male connector 112, thereby indirectly connecting the surface cable and the downhole cable together to form a complete cable. At this time, the logging instrument can be suspended through the complete cable.
[0052] Understandably, since the lateral dimension of the support base 12 is larger than the outer diameter of the rod, the support base 12 needs to be removed to allow the rod to be connected to the downhole rod. Therefore, after the female connector 111 and male connector 112 are connected, the winch rotates to lift the complete cable upwards by one end, thereby moving the male connector 112 upwards by one end, facilitating the separation of the support base 12 from the male connector 112 from the side and upwards through the first notch 122. When the winch rotates to lift the complete cable upwards by one end, due to the suspension of the logging instrument, the cable will experience a large tension change, resulting in its own torque release, causing the cable to rotate rapidly axially. When the cable rotates, it drives the quick connector 11 to rotate, causing the support base 12 to be subjected to centrifugal force and thrown outwards, which can easily lead to a safety accident. To address this issue, this embodiment includes a movable retaining ring 13 rotatably connected to the support base 12. During the complete cable lifting process, the movable retaining ring 13 can be positioned where the opening orientation of the second notch 131 is offset from the opening orientation of the first notch 122. At this time, the limiting effect of the movable retaining ring 13 prevents the support base 12 from separating from the male connector 112 from the side via the first notch 122, thus avoiding a safety accident caused by the support base 12 being thrown outwards due to centrifugal force. After the cable torque is released, when the centrifugal force on the support base 12 decreases and it no longer tends to separate from the male connector 112, the movable retaining ring 13 can rotate to a position where the opening orientation of the second notch 131 coincides with the opening orientation of the first notch 122. At this time, the movable retaining ring 13 no longer limits the male connector 112, allowing the support base 12 to separate from the male connector 112 from the side via the first notch 122.
[0053] Please refer to the following: Figure 1 , Figure 2 and Figure 3 In some embodiments, the support base 12 is provided with a limit pin 123, and the movable retaining ring 13 is provided with an arc groove 132. The limit pin 123 cooperates with the arc groove 132 so that the movable retaining ring 13 is rotatably connected to the support base 12.
[0054] The circular arc groove 132 extends circumferentially along the rotation axis of the movable retaining ring 13, and the movable retaining ring 13 can rotate relative to the support base 12 through the cooperation of the limiting and the circular arc groove 132.
[0055] Please refer to it again. Figure 1 and Figure 2In some embodiments, the connector assembly 1 further includes a retaining ring 14 surrounding the male connector 112. The retaining ring 14 is connected to the upper surface of the support base 12. The retaining ring 14 has a third notch 141, the opening orientation of which coincides with the opening orientation of the first notch 122. The retaining ring 14 has a limiting surface opposite to the upper surface of the support base 12, and the movable retaining ring 13 is rotatably disposed between the upper surface of the support base 12 and the limiting surface of the retaining ring 14.
[0056] The limiting pin 123 can be set on the upper surface of the support base 12, and the arc groove 132 can be set on the upper surface of the movable retaining ring 13.
[0057] The movable retaining ring 13 is rotatably positioned between the upper surface of the support base 12 and the limiting surface of the fixed retaining ring 14. It effectively limits the movable retaining ring 13 in the axial direction of the support base 12, preventing it from moving relative to the support base 12 in the axial direction. Combined with the engagement of the limiting pin 123 and the arc-shaped sliding groove 132, it prevents the movable retaining ring 13 from moving relative to the support base 12 in a direction perpendicular to its axial direction. In other words, the restriction imposed by the upper surface of the support base 12, the limiting surface of the fixed retaining ring 14, and the engagement of the limiting pin 123 and the arc-shaped sliding groove 132 ensures that the movable retaining ring 13 can only rotate relative to the support base 12.
[0058] The opening orientation of the third notch 141 of the fixed retaining ring 14 is the same as that of the first notch 122. This allows the support base 12 to separate from the male connector 112 from the side and upward via the first notch 122, preventing the fixed retaining ring 14 from obstructing the male connector 112.
[0059] In some embodiments, the connector assembly 1 further includes a limiting component 15 connected to the movable retaining ring 13, which limits the rotation of the movable retaining ring 13.
[0060] By setting the limiting component 15, the movable retaining ring 13 can be prevented from rotating relative to the support base 12, thus avoiding the situation where the movable retaining ring 13 should be in a position where the opening orientation of the second notch 131 is misaligned with the opening orientation of the first notch 122, but when the support base 12 is rotated by centrifugal force, the movable retaining ring 13 rotates relative to the support base 12 to a position where the opening orientation of the second notch 131 coincides with the opening orientation of the first notch 122.
[0061] Please refer to the following: Figure 4 and Figure 5In some embodiments, the movable retaining ring 13 is provided with a limiting hole 133. One end of the limiting hole 133 penetrates the upper surface of the movable retaining ring 13 opposite to the limiting surface. One end of the limiting component 15 is disposed in the limiting hole 133, and the limiting surface is provided with a limiting groove 142. When the movable retaining ring 13 rotates until the limiting groove 142 is opposite to the limiting hole 133, the other end of the limiting component 15 extends out of the limiting hole 133 and is embedded in the limiting groove 142 to restrict the rotation of the movable retaining ring 13.
[0062] For example, when the movable retaining ring 13 rotates to the point where the opening orientation of the second notch 131 is misaligned with the opening orientation of the first notch 122, the limiting groove 142 is opposite to the limiting hole 133. One end of the limiting component 15 extends out of the limiting hole 133 and is embedded in the limiting groove 142, thereby preventing the movable retaining ring 13 from rotating relative to the support base 12. Please refer to the following: Figure 4 , Figure 5 and Figure 6 In some embodiments, the limiting component 15 includes a telescopic member 151 and a limiting member 152. One end of the telescopic member 151 is disposed within the limiting hole 133. The limiting member 152 is connected to the other end of the telescopic member 151. When the movable retaining ring 13 rotates to the point where the opening of the second notch 131 is misaligned with the opening of the first notch 122, the limiting groove 142 is opposite to the limiting hole 133, and the telescopic member 151 extends to push the limiting member 152 to at least partially embed into the limiting groove 142, thereby restricting the rotation of the movable retaining ring 13.
[0063] The telescopic component 151 can be a spring or other elastic component, and there is no limitation on it.
[0064] For example, when the movable retaining ring 13 rotates to the point where the opening orientation of the second notch 131 is misaligned with the opening orientation of the first notch 122, the limiting groove 142 is opposite to the limiting hole 133, and the telescopic member 151 extends to push the limiting member 152 to be at least partially embedded in the limiting groove 142, thereby preventing the movable retaining ring 13 from rotating relative to the support base 12.
[0065] When it is necessary to separate the support base 12 from the male connector 112, the telescopic member 151 shortens so that the limiting member 152 can leave the limiting groove 142, thereby allowing the movable retaining ring 13 to rotate relative to the support base 12.
[0066] Please continue reading. Figure 4 , Figure 5 and Figure 6 In some embodiments, the groove wall of the limiting groove 142 is spherical, and the limiting member 152 is spherical. When the movable retaining ring 13 rotates to the point where the opening of the second notch 131 is misaligned with the opening of the first notch 122, the limiting groove 142 is opposite to the limiting hole 133, and the telescopic member 151 extends to push the limiting member 152 partially into the limiting groove 142 to restrict the rotation of the movable retaining ring 13.
[0067] By configuring the shape of the limiting member 152 as a sphere and the shape of the groove wall of the limiting groove 142 as a spherical surface, when the limiting member 152 is partially embedded in the limiting groove 142, it can prevent the movable retaining ring 13 from rotating relative to the support seat 12. At the same time, when it is necessary to separate the support seat 12 from the male connector 112, it can reduce the difficulty for the limiting member 152 to overcome the force applied by the telescopic member 151 to shorten the telescopic member 151 and for the limiting member 152 to leave the limiting groove 142.
[0068] Please refer to it again. Figure 5 In some embodiments, the number of limiting grooves 142 is at least two, and at least two limiting grooves 142 are circumferentially spaced along the axis of the fixed retaining ring 14. When the movable retaining ring 13 rotates to the point where the opening orientation of the second notch 131 coincides with or is offset from the opening orientation of the first notch 122, the limiting hole 133 is opposite to the two limiting grooves 142 respectively.
[0069] For example, when the movable retaining ring 13 rotates to the point where the opening orientation of the second notch 131 is misaligned with the opening orientation of the first notch 122, one of the limiting grooves 142 is opposite to the limiting hole 133. One end of the limiting component 15 extends out of the limiting hole 133 and is embedded in the limiting groove 142, thereby preventing the movable retaining ring 13 from rotating relative to the support base 12 and causing the opening orientation of the second notch 131 to coincide with the opening orientation of the first notch 122.
[0070] When it is necessary to separate the support base 12 from the male connector 112, the end of the limiting component 15 separates from the limiting groove 142, and the movable retaining ring 13 rotates until the opening orientation of the second notch 131 coincides with the opening orientation of the first notch 122. At this time, the other limiting groove 142 is opposite to the limiting hole 133, and one end of the limiting component 15 extends out of the limiting hole 133 and is embedded in the limiting groove 142, thereby preventing the movable retaining ring 13 from rotating relative to the support base 12 and causing the opening orientation of the second notch 131 to be misaligned with the opening orientation of the first notch 122.
[0071] Please refer to it again. Figure 1 and Figure 2 In some embodiments, the support base 12 is provided with a handle 124, which is located outside the rotation path of the movable retaining ring 13.
[0072] For example, if the movable retaining ring 13 is rotatably disposed on the upper surface of the support base 12, then the handle 124 can be disposed on the side of the support base 12.
[0073] By providing a handle 124, it is convenient for the operator to hold the handle 124 and separate the support base 12 from the male connector 112 from the side through the first notch 122.
[0074] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A connector assembly, characterized in that, include: A quick connector, comprising a female connector and a male connector capable of connection, the female connector for connecting an surface cable and the male connector for connecting a downhole cable, wherein the downhole cable is connected to a measuring instrument; The support base has a side surface that is an arc surface extending circumferentially along its own axis. The support base is provided with a first through hole that penetrates the support base along its axial direction. The first through hole is for the male connector to pass through. The side surface of the support base is also provided with a first notch that connects to the first through hole. as well as A movable retaining ring is rotatably connected to the support base and surrounds the male connector. The movable retaining ring has a second notch. The movable retaining ring is configured to allow the opening of the second notch to coincide with or be offset from the opening of the first notch when rotated, so as to allow or prevent the male connector from leaving the first through hole through the first notch.
2. The connector assembly according to claim 1, characterized in that, The support base is provided with a limiting pin, and the movable retaining ring is provided with an arc-shaped sliding groove. The limiting pin cooperates with the arc-shaped sliding groove to allow the movable retaining ring to rotate and connect to the support base.
3. The connector assembly according to claim 1, characterized in that, It also includes a retaining ring surrounding the male connector, the retaining ring being connected to the upper surface of the support base, the retaining ring having a third notch, the opening orientation of the third notch coinciding with the opening orientation of the first notch; The fixed retaining ring has a limiting surface opposite to the upper surface of the support base, and the movable retaining ring is rotatably disposed between the upper surface of the support base and the limiting surface of the fixed retaining ring.
4. The connector assembly according to claim 3, characterized in that, It also includes a limiting component connected to the movable retaining ring, the limiting component being used to limit the rotation of the movable retaining ring.
5. The connector assembly according to claim 4, characterized in that, The movable retaining ring is provided with a limiting hole, one end of which penetrates the upper surface of the movable retaining ring opposite to the limiting surface. One end of the limiting component is disposed in the limiting hole, and the limiting surface is provided with a limiting groove. The movable retaining ring rotates until the limiting groove is opposite to the limiting hole, and the other end of the limiting component extends out of the limiting hole and is embedded in the limiting groove to restrict the rotation of the movable retaining ring.
6. The connector assembly according to claim 5, characterized in that, The limiting component includes: A telescopic member, one end of which is disposed within the limiting hole; and A limiting member, which is connected to the other end of the telescopic member; When the movable retaining ring rotates to the point where the opening of the second notch is misaligned with the opening of the first notch, the limiting groove is opposite to the limiting hole, and the telescopic member extends to push the limiting member to at least partially embed into the limiting groove, thereby restricting the rotation of the movable retaining ring.
7. The connector assembly according to claim 6, characterized in that, The groove wall of the limiting groove is spherical, and the limiting member is spherical. When the movable retaining ring rotates to the point where the opening of the second notch is misaligned with the opening of the first notch, the limiting groove is opposite to the limiting hole, and the telescopic member extends to push the limiting member partially into the limiting groove to restrict the rotation of the movable retaining ring.
8. The connector assembly according to claim 5, characterized in that, The number of the limiting grooves is at least two, and the at least two limiting grooves are arranged circumferentially at intervals along the axis of the fixed retaining ring. When the movable retaining ring rotates to the point where the opening orientation of the second notch coincides with or is offset from the opening orientation of the first notch, the limiting hole is respectively opposite to the two limiting grooves.
9. The connector assembly according to claim 1, characterized in that, The support base is provided with a handle, which is located outside the rotation path of the movable retaining ring.
10. A salvage device, characterized in that, Includes the connector assembly as described in any one of claims 1-9.