Downhole cable connecting structure and wellhead cable quick-matching device

Abstract

The utility model discloses an underground cable connecting structure and a wellhead cable quick-matching device, and belongs to the technical field of cable connection, and the underground cable connecting structure comprises a fixing mechanism which is connected with a wellhead; the connecting mechanism is arranged in the fixing mechanism and is connected with an underground cable; the fixing mechanism comprises a fixing piece, a first connecting channel and a second connecting channel, wherein the first connecting channel and the second connecting channel are arranged in the fixing piece. Wherein the first connecting channel is vertically arranged in the fixing piece, the connecting mechanism is connected with the first connecting channel, and the second connecting channel is horizontally arranged. According to the utility model, the connecting mechanism connected with the underground cable is rotated to the preset position in the fixing mechanism, so that the connecting mechanism is conveniently connected with the ground cable, the technical problem of slow pairing of the ground cable and the underground cable is solved, and the technical effect of rapid pairing of the ground cable and the underground cable is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of cable joints, in particular to an underground cable connection structure and a wellhead cable quick matching device. Background Art

[0002] During the oil extraction process, various sensors and devices are usually installed at the wellhead, such as sensors, pumps, valves, etc., for monitoring the bottom hole conditions, collecting data or controlling operations. These devices need to be connected to the ground control system to monitor and control the bottom hole conditions in real time, and the wellhead cable connection device is an important component for connecting the wellhead equipment and the ground control system to ensure that signal transmission, data collection and control can be carried out normally and effectively in the oil wellhead.

[0003] In the prior art, when connecting the onshore cable and the offshore cable, the operation is relatively complex, and it is impossible to quickly connect the onshore cable and the offshore cable at the wellhead, which will not only increase the operation intensity of the operators, but also increase the working cycle. Summary of the Utility Model

[0004] To solve the above problems, in the first aspect of the present utility model, an underground cable connection structure is provided, including:

[0005] A fixing mechanism, which is connected to the wellhead;

[0006] A connecting mechanism, which is arranged in the fixing mechanism and is connected to the underground cable;

[0007] The fixing mechanism includes: a fixing member, and a first connection channel and a second connection channel arranged in the fixing member;

[0008] Wherein, the first connection channel is vertically arranged in the fixing member, the connecting mechanism is connected to the first connection channel, and the second connection channel is horizontally arranged.

[0009] In some embodiments, the connecting mechanism includes:

[0010] A connecting head, a third connection channel and a cable fixing member arranged in the connecting head;

[0011] Wherein, the connecting head is connected to the fixing member;

[0012] A guiding slideway adapted to the fixing member is arranged on the outer periphery of the connecting head, and a guiding member is arranged on the inner wall of the fixing member, and the guiding member is matched with the guiding slideway to turn the first connecting head to a preset orientation.

[0013] In some embodiments, the guiding slideway includes an inclined guiding section and a downward moving section connected to the guiding section and vertically arranged;

[0014] Among them, after the guiding section abuts against the guiding member, it is used to guide the connector to turn to a preset direction, and after the downward moving section abuts against the guiding member, it is used to guide the connector to slide down to a preset position.

[0015] In some embodiments, the guiding slideway is an inverted Y-shaped structure arranged vertically.

[0016] In some embodiments, the guiding section is spiral.

[0017] In some embodiments, the third connection channel is an L-shaped structure, and a plurality of groups of electrode heads are arranged in the third connection channel, and the electrode heads are L-shaped structures adapted to the third connection channel.

[0018] In some embodiments, the connection mechanism further includes: a first telescopic cylinder and a second telescopic cylinder; wherein, both the first telescopic cylinder and the second telescopic cylinder are hollow structures;

[0019] One end of the first telescopic cylinder is fixed in the fixing member;

[0020] The ends of the first telescopic cylinder and the second telescopic cylinder that are connected to each other are of a snap-fit structure.

[0021] In some embodiments, a connection hole is formed on the first telescopic cylinder, and a fixing pin adapted to the connection hole is formed on the second telescopic cylinder, and the fixing pin is connected to the connection hole for locking the first telescopic cylinder and the second telescopic cylinder to each other.

[0022] The second aspect of the present invention provides a wellhead cable quick matching device, including the downhole cable connection structure described in any one of the above solutions.

[0023] By adopting the above technical solutions, the present invention mainly has the following technical effects:

[0024] By rotating the connection mechanism connected to the downhole cable to a preset position in the fixing mechanism, so as to connect the connection mechanism with the wellhead cable, the technical problem of slow matching between the wellhead cable and the downhole cable is solved, and the technical effect of quickly matching the wellhead cable and the downhole cable is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a downhole cable connection structure of the present invention;

[0026] Figure 2 It is a partial structural schematic diagram of a downhole cable connection structure of the present invention;

[0027] Figure 3 It is a schematic structural diagram of a third connection channel in a downhole cable connection structure of the present invention;

[0028] Figure 4 This is a schematic structural view of the guiding slideway in a downhole cable connection structure of the present utility model;

[0029] Figure 5 This is a schematic structural view (from another perspective) of the guiding slideway in a downhole cable connection structure of the present utility model.

[0030] Among them, the meanings of the reference numerals are as follows:

[0031] 1. Fixing mechanism; 11. Fixing piece; 12. First connection channel; 13. Second connection channel;

[0032] 2. Connecting mechanism; 21. First connection head; 211. Fishing part; 212. Guiding slideway; 2121. Guiding section; 2122. Downward movement section; 22. Third connection channel; 221. Electrode head; 23. Cable fixing piece; 24. First telescopic cylinder; 241. Connection hole; 25. Second telescopic cylinder; 251. Fixing pin; Specific implementation manners

[0033] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the specification drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0034] Referring to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present utility model. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0035] Embodiment 1

[0036] Please refer to Figures 1 - 5 , the first aspect of the present utility model provides a downhole cable connection structure. When the downhole cable connection structure is actually applied, in order to connect the downhole cable to the wellhead, it includes: a fixing mechanism 1, the fixing mechanism 1 is connected to the wellhead; a connecting mechanism 2, the connecting mechanism is arranged in the fixing mechanism 1 and is connected to the downhole cable.

[0037] Further, the fixing mechanism 1 includes: a fixing member 11, and a first connection channel 12 and a second connection channel 13 provided in the fixing member 11. In one embodiment, the fixing member 11 can be connected to the equipment at the wellhead, so as to arrange the fixing mechanism 1 at the wellhead.

[0038] In some embodiments, the first connection channel 12 is vertically arranged in the fixing member 11, and the connection mechanism 2 is connected to the first connection channel 12, so as to fix the connection mechanism 2 in the fixing mechanism 1. The second connection channel 13 is horizontally arranged and is used to connect the on-well cable to the connection mechanism 2 in the fixing mechanism 1.

[0039] Further, the connection mechanism 2 includes: a connection head 21, a third connection channel 22 and a cable fixing member 23 provided in the connection head 21; wherein, the connection head 21 is connected to the fixing member 11, and the cable fixing member 23 is connected to the down-well cable, so as to connect the down-well cable to the wellhead.

[0040] In one embodiment, the top of the connection head 21 is a fishing part 211 that is wider at the top and narrower at the bottom. By designing the fishing part 211 into a funnel shape that is wider at the top and narrower at the bottom, on the one hand, the fishing part 211 is fixed to the top of the fixing member 11; on the other hand, the operator can also use fishing equipment to take out the connection mechanism 2 from the fixing mechanism 1, repair and maintain the connection mechanism 2, or install the connection mechanism 2 in the fixing mechanism 1.

[0041] Further, the connection head 21 is of a cylindrical structure, and a guiding slideway 212 adapted to the fixing member 11 is provided on its outer periphery. In one embodiment, a guiding member 111 is provided on the inner wall of the fixing member 11, and the guiding member 111 cooperates with the guiding slideway 212 to turn the connection head 11 to a preset orientation.

[0042] Further, the guiding slideway 212 includes an inclined guiding section 2121 and a downward moving section 2122 connected to the guiding section 2121 and arranged vertically; wherein, after the guiding section 2121 abuts against the guiding member 111, it is used to guide the first connection head 11 to turn to a preset direction, and after the downward moving section 2122 abuts against the guiding member 111, it is used to guide the connection head 21 to slide down to a preset position. In one embodiment, the guiding member 111 is a guiding pin. After the guiding pin abuts against the guiding section 2121, under the action of the self-gravity of the connection head 21, the connection head 21 will turn along the setting direction of the guiding section 2121 until the guiding pin slides into the downward moving section 2122, so that the connection head 21 slides into the fixing member 11 along the preset direction; by presetting the length of the downward moving section 2122, the connection head 21 is slid down to a preset position in the fixing member 11.

[0043] In one embodiment, the guiding slideway 212 is a vertically arranged inverted Y-shaped structure. It can be understood that by setting the tops of the two guiding sections 2121 to be close to each other, after any section of the guiding slideway 212 abuts against the guiding pin, the guiding pin can finally slide into the downward moving section 2122, thereby ensuring that the connector 21 can always slide into the fixing member 11 in the preset direction.

[0044] In one embodiment, the guiding section 2121 is spiral. By setting the guiding section 2121 to be spiral, the connector 21 can turn more smoothly.

[0045] Further, the third connection channel 22 is an L-shaped structure for accommodating the downhole cable and pulling the downhole cable to the wellhead. In one embodiment, a plurality of electrode heads 221 are provided in the third connection channel 22. The electrode heads 221 are L-shaped structures adapted to the third connection channel 221. The vertically arranged part thereof is connected to the downhole cable, and the horizontally arranged part thereof is connected to the surface cable.

[0046] In one embodiment, the cable fixing member 23 is connected to one end of the downhole cable, thereby connecting the downhole cable to the wellhead and fixing it in the third connection channel 22.

[0047] Further, the connecting mechanism 2 further includes: a first telescopic cylinder 24 and a second telescopic cylinder 25; wherein, both the first telescopic cylinder 24 and the second telescopic cylinder 25 are hollow structures. The downhole cable passes through the hollow parts of the first telescopic cylinder 24 and the second telescopic cylinder 25 in sequence and then is connected to the downhole equipment. Moreover, the first telescopic cylinder 24 and the second telescopic cylinder 25 have a certain stiffness and hardness, which can effectively avoid mechanical collision damage to the downhole cable, thereby playing a certain protective role.

[0048] In one embodiment, one end of the first telescopic cylinder 24 is connected to the fixing member 11 through a fixing pin, thereby fixing the first telescopic cylinder 24 in the fixing mechanism 1. In one embodiment, the end of the first telescopic cylinder 24 far from the cable fixing member 22 is connected to the second telescopic cylinder 25. By movably connecting the first telescopic cylinder 24 and the second telescopic cylinder 25 and adjusting the position of the second telescopic cylinder 25, an operating space is reserved for connecting the downhole cable, thereby enhancing the practicability.

[0049] Furthermore, one end of the first telescopic cylinder 24 and the second telescopic cylinder 25 connected to each other is a fastening structure, enabling the second telescopic cylinder 25 to slide along the first telescopic cylinder 24, thereby realizing the telescopic process after the connection of the first telescopic cylinder 24 and the second telescopic cylinder 25. In one embodiment, by making one end of the first telescopic cylinder 24 and the second telescopic cylinder 25 connected to each other a fastening structure, the telescopic process can be realized after the connection of the first telescopic cylinder 24 and the second telescopic cylinder 25, but they will not separate.

[0050] In one embodiment, a connection hole 241 is formed on the first telescopic cylinder 24, and a fixing pin 251 adapted to the connection hole 241 is provided on the second telescopic cylinder 25. An operator can lock the first telescopic cylinder 24 and the second telescopic cylinder 25 to each other by connecting the fixing pin 251 with the connection hole 241.

[0051] Embodiment 2

[0052] The second aspect of the present invention provides a wellhead cable quick matching device, including a downhole cable connection structure described in Embodiment 1.

[0053] Finally, it should be noted that: the embodiments disclosed in the present invention are only preferred embodiments of the present invention, and are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A downhole cable connection structure, characterized in that: include: A fixing mechanism connected to the wellhead; A connecting mechanism, which is arranged in the fixing mechanism and connected to the downhole cable; The fixing mechanism comprises: a fixing member, and a first connecting channel and a second connecting channel provided in the fixing member; Wherein, the first connecting channel is vertically arranged in the fixing member, the connecting mechanism is connected to the first connecting channel, and the second connecting channel is horizontally arranged.

2. A downhole cable connection structure according to claim 1, characterized in that: The connecting mechanism comprises: A connector, a third connecting channel and a cable fixing member provided in the connector; Wherein, the connector is connected to the fixing piece; A guide slideway matched with the fixing member is arranged on the outer periphery of the connecting head, and a guide member is arranged on the inner wall of the fixing member. The guide member cooperates with the guide slideway to turn the first connecting head to a preset position.

3. A downhole cable connection structure according to claim 2, characterized in that: The guide slideway comprises a guide section which is arranged obliquely, and a downward moving section which is connected to the guide section and arranged vertically; Wherein, after the guide section abuts against the guide member, it is used to guide the connector to turn to a preset direction, and after the downward moving section abuts against the guide member, it is used to guide the connector to slide down to a preset position.

4. A downhole cable connection structure according to claim 2, characterized in that: The guide slideway is a vertically arranged inverted Y-shaped structure.

5. A downhole cable connection structure according to claim 3, characterized in that: The guide section is spiral.

6. A downhole cable connection structure according to claim 2, characterized in that: The third connecting channel is an L-shaped structure. A plurality of groups of electrode heads are arranged in the third connecting channel. The electrode heads are L-shaped structures that match the third connecting channel.

7. A downhole cable connection structure according to claim 1, characterized in that: The connecting mechanism further includes: a first telescopic cylinder and a second telescopic cylinder; wherein the first telescopic cylinder and the second telescopic cylinder are both hollow structures; One end of the first telescopic cylinder is fixed in a fixing member; One end where the first telescopic tube and the second telescopic tube are connected to each other is a buckle structure.

8. A downhole cable connection structure according to claim 7, characterized in that: The first telescopic cylinder is provided with a connecting hole, and the second telescopic cylinder is provided with a fixing pin matched with the connecting hole. The fixing pin is connected to the connecting hole for locking the first telescopic cylinder and the second telescopic cylinder with each other.

9. A wellhead cable quick-matching device, characterized in that: The invention comprises the downhole cable connection structure according to any one of claims 1 to 8.

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