Novel single-core cable bridle

Abstract

The utility model is applicable to the field of petroleum, and particularly relates to a novel single-core cable headstall, which is characterized in that a shearing taper sleeve is fixed at the front end of a headstall base body through a weakness shearing pin, and the headstall base body is provided with a first connecting through hole; a cable connecting through hole is formed in the shearing taper sleeve, and a second connecting through hole corresponding to the first connecting through hole is formed in the inner wall of the shearing taper sleeve; the weakness shear pin is fixed in the first connecting through hole and the second connecting through hole in an embedded mode, the lower end of the weakness shear pin is provided with cable protection calipers, and the diameter of a pin column of the weakness shear pin is not larger than that of a connecting column of the cable protection calipers; and a protective sleeve is fixed on the outer side of the weak point shear pin through a screw. According to the utility model, the cable protection calipers are arranged at the lower end of the weakness shear pin, so that the possibility that the cable is scratched or cut off by external objects is effectively reduced, the pulling or twisting force of the cable can be effectively shared, the integrity of the cable is protected, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of petroleum, and particularly relates to a new type of single-core cable sub. Background Art

[0002] At the test site of an oilfield test well, a logging cable sub is required to connect a logging cable to a logging instrument.

[0003] The existing logging cable sub has weaknesses. Specifically, a cone wrapped with the outer armor of the logging cable is pressed against the upper joint of the logging cable sub by a compression cap. When the logging instrument gets stuck, the mechanical tension provided by the test winch is used to break the logging cable at the cone, realizing the separation of the logging cable from the logging cable sub.

[0004] The existing cable and the weakness are fixedly connected by a direct pressure method. During the exploration process, the weakness and the cable will vibrate, which will cause the cable to be damaged, and then cause the loss of sensor signals. The existing device adds a leather sleeve at the connection between the weakness and the cable to relieve the wear between the cable and the weakness. However, in the actual use process, due to the deep depth of the oilfield test well, the leather sleeve is easy to slip off. At the same time, during installation, the leather sleeve needs to be sleeved on one end of the cable, and then the leather sleeve is moved to the connection with the weakness, and the installation process is very cumbersome.

[0005] In summary, there is an urgent need for a new single-core cable sub to solve the problem that the connection between the cable and the weakness in the existing single-core cable sub is easily damaged, resulting in the loss of sensing signals. Content of the Utility Model

[0006] The embodiment of the utility model provides a new type of single-core cable sub, aiming to solve the problem that the connection between the cable and the weakness in the existing single-core cable sub is easily damaged, resulting in the loss of sensing signals.

[0007] The embodiment of the utility model is implemented as follows:

[0008] A new type of single-core cable sub includes:

[0009] A sub body, with a shear cone sleeve fixed at the front end through a weakness shear pin, and the sub body is provided with a first connection through hole;

[0010] The shear cone sleeve, with a cable connection through hole inside, and a second connection through hole corresponding to the first connection through hole on the inner wall;

[0011] The weakness shear pin is fixed in the first connection through hole and the second connection through hole by inlaying. The lower end of the weakness shear pin is provided with a cable protection clamp, and the diameter of the shear pin column of the weakness shear pin is not greater than the connection column of the cable protection clamp;

[0012] Among them, a protective sleeve is fixed outside the weak shear pin by screws.

[0013] Furthermore, a shear bushing is sleeved outside the weak shear pin.

[0014] Furthermore, the extrusion surface between the protective caliper at the lower end of the weak shear pin and the cable is arc-shaped.

[0015] Furthermore, a ring-shaped protective embedding groove is provided on the subsea cable connector body outside the first connection through hole.

[0016] Furthermore, the second connection through hole is a stepped through hole.

[0017] Furthermore, a conical guiding groove is provided at the rear end of the shear cone sleeve.

[0018] The beneficial effects achieved by the present utility model are as follows:

[0019] By providing a cable protection caliper at the lower end of the weak shear pin in the present utility model, the diameter of the pin column of the weak shear pin is not greater than the connecting column of the cable protection caliper. With the cable protection caliper provided at the lower end of the weak shear pin, the cable protection caliper can be firmly fixed on the cable, effectively reducing the possibility of the cable being scratched or cut by external objects, and can also effectively share the pulling or twisting force on the cable, protecting the integrity of the cable and extending the service life of the cable.

[0020] At the same time, by making the diameter of the pin column of the weak shear pin not greater than the connecting column of the cable protection caliper, when a fishing accident occurs to the logging tool stuck, by cutting off the weak shear pin, the shear cone sleeve is separated from the main body, so that the cable can be disengaged from the subsea cable connector, thus protecting the cable and facilitating the handling of the fishing accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the new single-core cable subsea cable connector provided by the present utility model;

[0022] Figure 2 is a partial enlarged schematic diagram of A of the present utility model.

[0023] Reference Numerals in the Drawings:

[0024] 100, single-core cable subsea cable connector;

[0025] 110, subsea cable connector body; 111, guiding groove; 120, shear cone sleeve; 130, weak shear pin; 131, screw; 132, shear bushing; 133, extrusion surface; 134, protective sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] In the present utility model, a cable protection caliper is provided at the lower end of the weak shear pin. The diameter of the pin column of the weak shear pin is not greater than that of the connecting column of the cable protection caliper. A cable protection caliper is provided at the lower end of the weak shear pin. The cable protection caliper can be firmly fixed on the cable, effectively reducing the possibility of the cable being scratched or cut by external objects, and can also effectively share the pulling or twisting force on the cable, protecting the integrity of the cable and extending the service life of the cable.

[0028] At the same time, the diameter of the pin column of the weak shear pin is not greater than that of the connecting column of the cable protection caliper. When a logging instrument gets stuck and needs to be salvaged, by cutting off the weak shear pin, the shear cone sleeve is separated from the main body, so that the cable can be disengaged from the logging cable master head, thereby protecting the cable and facilitating the handling of the salvage accident.

[0029] Example 1

[0030] Refer to Figure 1 , in the embodiment of the present utility model, the present embodiment provides a new type of single-core cable master head 100, including: a master head base body 110, a shear cone sleeve 120 is fixed at the front end through a weak shear pin 130, and the master head base body 110 is provided with a first connection through hole;

[0031] The shear cone sleeve 120 has a cable connection through hole inside, and a second connection through hole corresponding to the first connection through hole is provided on the inner wall;

[0032] The weak shear pin 130 is fixed in the first connection through hole and the second connection through hole by means of inlay. A cable protection caliper is provided at the lower end of the weak shear pin 130, and the diameter of the pin column of the weak shear pin 130 is not greater than that of the connecting column of the cable protection caliper;

[0033] Wherein, a protective sleeve 134 is fixed on the outside of the weak shear pin 130 by a screw 131.

[0034] In this embodiment, the single-core cable master head 100 is an important component for connecting a cable and a device. The single-core master head can be used to connect, fix and protect the cable. In the existing single-core cable master head 100, the connection between the cable and the weak point is prone to breakage, resulting in the loss of sensing signals.

[0035] See Figure 1, this embodiment provides a new type of single-core cable subsea connector 100, which specifically includes a subsea connector base body 110 for fixing the cable. The subsea connector base body 110 can be specifically made of heat-resistant and corrosion-resistant materials, including but not limited to stainless steel, carbon steel, and alloy steel. The specific material can be selected according to actual needs. The shape of the subsea connector base body 110 is a cylindrical shape with openings at both ends and a hollow middle. A first connection through-hole for fixing the weak point can be opened at the front end of the subsea connector base body 110. The cross-sectional shape of the first connection through-hole can be T-shaped, rectangular, or trapezoidal. The specific shape can be selected according to the shape of the actual weak point shear pin 130.

[0036] A cable passes through the subsea connector base body 110. The front end of the subsea connector base body 110 is threadedly connected to a drill pipe, and the rear end of the subsea connector is threadedly connected to a drilling pipe. Specifically, a shear cone sleeve 120 is fixed at the front end of the subsea connector base body 110 through a weak point shear pin 130. Among them, the weak point shear pin 130 is fixed to the upper end of the subsea connector base body 110 by inlaying, and the shear cone sleeve 120 is inlaid in the subsea connector base body 110. After the weak point shear pin 130 is fixed to the subsea connector base body 110, it is inlaid and connected to the shear cone sleeve 120. Among them, the material of the weak point shear pin 130 is alloy steel or stainless steel. The weak point shear pin 130 includes but is not limited to cylindrical and hexagonal shapes. In this embodiment, a cylindrical shape is preferably selected.

[0037] In another embodiment, a first connection through-hole is provided in the subsea connector base body 110 for fixing the weak point shear pin 130. The cross-sectional shape of the first connection through-hole can be rectangular or "T"-shaped. The specific shape can be selected according to actual needs.

[0038] Based on the above structure, when installing the shear cone sleeve 120, the shear cone sleeve 120 is inlaid in the subsea connector base body 110, and then the weak point shear pin 130 is fixed in the first connection through-hole, so that the shear cone sleeve 120 is fixedly connected to the subsea connector base body 110.

[0039] In another embodiment, the shear cone sleeve 120 is used to fix the cable. The shape of the shear cone sleeve 120 is cylindrical. The outer diameter of the shear cone sleeve 120 is smaller than the inner diameter of the subsea connector base body 110. A cable connection through-hole is provided inside the shear cone sleeve 120. A second connection through-hole corresponding to the first connection through-hole is provided on the inner wall of the shear cone sleeve 120. Based on the above structure, after the cable passes through the cable connection through-hole, the weak point shear pin 130 sequentially passes through the first connection through-hole and the second connection through-hole, and the weak point shear pin 130 presses against the cable. By further increasing the pressure of the weak current shear pin on the cable, the cable is pressed in the shear cone sleeve 120.

[0040] In yet another embodiment, the weak shear pin 130 is used to cut the cable. When the instrument gets stuck during oil well logging, the mechanical tension provided by the winch is utilized to break the logging cable at the sticking cone, achieving the separation of the logging cable from the logging cable pony head. The weak shear pin 130 is fixed in the first connection through-hole and the second connection through-hole by means of inlay. The weak shear pin 130 sequentially passes through the first connection through-hole and the second connection through-hole and is connected to the cable by extrusion.

[0041] A cable protection caliper is provided at the lower end of the weak shear pin 130. The protection caliper is used to protect the cable when it is extruded with the cable. The shape of the cable protection caliper can be arc-shaped, semi-circular, or other shapes. The specific shape can be selected according to the actual shape of the cable.

[0042] Furthermore, the diameter of the pin column of the weak shear pin 130 is not greater than the connecting column of the cable protection caliper. It is easy to understand that the diameter of the pin column of the weak shear pin 130 is less than or equal to the connecting column of the cable protection caliper. The upper end of the pin column of the weak shear pin 130 is connected to the protective sleeve 134 by extrusion, and the lower end of the pin column of the weak shear pin 130 is connected to the connecting column. When the instrument gets stuck during oil well logging, the mechanical tension provided by the winch is utilized to break the pin column of the weak shear pin 130, achieving the separation of the cable from the shear cone sleeve 120.

[0043] In another embodiment, a protective sleeve 134 is fixed to the outside of the weak shear pin 130 by screws 131. The shape of the protective sleeve 134 can be annular or cylindrical. The specific shape can be selected according to actual requirements. The protective sleeve 134 and the shear pin can be fixedly connected by inlay or by means of threads. The specific connection method can be selected according to actual requirements. The protective sleeve 134 is used to protect the weak electric shear pin and prevent the weak electric shear pin from falling off.

[0044] Based on the above, during installation, one end of the cable is passed through the shear cone sleeve 120, and the other end passes out from within the pony head base 110. Then, one end of the shear cone sleeve 120 is inlaid within the pony head base 110, and the shear cone sleeve 120 is rotated so that the centerlines of the first connection through-hole and the second connection through-hole are approximately coincident. Then, the weak shear pin 130 is sequentially passed through the first connection through-hole and the second connection through-hole and connected to the cable by extrusion. The pressure on the weak electric shear pin is further increased to make the cable closely adhere within the pony head base 110. When the instrument gets stuck during oil well logging, the mechanical tension provided by the winch is utilized to break the logging cable at the sticking cone, achieving the separation of the logging cable from the logging cable pony head.

[0045] By providing a cable protection caliper at the lower end of the weak shear pin 130, the diameter of the pin column of the weak shear pin 130 is not greater than that of the connecting column of the cable protection caliper. With the cable protection caliper provided at the lower end of the weak shear pin 130, the cable protection caliper can be firmly fixed on the cable, effectively reducing the possibility of the cable being scratched or cut by external objects. It can also effectively share the pulling or twisting force on the cable, protect the integrity of the cable, and extend the service life of the cable.

[0046] At the same time, the diameter of the pin column of the weak shear pin 130 is not greater than that of the connecting column of the cable protection caliper. When a stuck logging tool fishing accident occurs, by cutting off the weak shear pin 130, the shear cone sleeve 120 is separated from the main body, so that the cable can be disengaged from the logging cable master head, thereby protecting the cable and facilitating the handling of the fishing accident.

[0047] Example 2

[0048] See Figure 1 In the embodiment of the present utility model, a shear shaft sleeve 132 is sleeved outside the weak shear pin 130.

[0049] In this embodiment, a shear shaft sleeve 132 is sleeved outside the weak shear pin 130. Specifically, the shear shaft sleeve 132 is used to fix the weak shear pin 130. The shear shaft sleeve 132 is sleeved in the gaps between the weak shear pin 130 and the first connection through hole and between the weak shear pin 130 and the second connection through hole. During installation, the center lines of the first connection through hole and the second connection through hole are made to be approximately coincident, the shear shaft sleeve 132 is sleeved outside the weak electric shear pin, so that the weak electric shear pin and the shear shaft sleeve 132 are fixed together, and then the shear shaft sleeve 132 is sequentially embedded in the first connection through hole and the second connection through hole.

[0050] By providing the shear shaft sleeve 132, the gaps between the weak electric shear pin and the first connection through hole and the second connection through hole can be filled, avoiding damage to the weak electric shear pin due to shaking. At the same time, by providing the shear shaft sleeve 132, the shear shaft sleeve 132 is embedded in the first connection through hole and the second connection through hole, which can prevent the shear cone sleeve 120 from rotating along the master head base 110, avoid the fracture of the weak electric shear pin, and increase the safety performance of the device.

[0051] Example 3

[0052] See Figure 1 In the embodiment of the present utility model, the extrusion surface 133 between the cable protection caliper at the lower end of the weak shear pin 130 and the cable is arc-shaped.

[0053] In this embodiment, the extrusion surface 133 between the lower-end protection caliper of the weak-point shear pin 130 and the cable is arc-shaped. By setting the extrusion surface 133 between the protection caliper and the cable to be arc-shaped, the firmness between the weak-point shear pin 130 and the cable can be improved, preventing the cable from having poor contact or breaking due to external vibration or pulling during use. At the same time, the arc-shaped extrusion surface 133 can also evenly distribute the pressure, preventing the cable from being damaged due to excessive local pressure.

[0054] Example 4

[0055] See Figure 1 , in the embodiment of the present utility model, a ring-shaped protection groove is provided on the faucet base body 110 outside the first connection through hole.

[0056] In this embodiment, a ring-shaped protection groove is provided on the faucet base body 110 outside the first connection through hole. It is easy to understand that a protective sleeve 134 for protecting the weak-current shear pin is embedded in the groove. The shape of the protective sleeve 134 is complementary to the shape of the protection groove. After the weak-point shear pin 130 is embedded in the first connection through hole, the protective sleeve 134 is embedded in the protection groove.

[0057] By providing a ring-shaped protection groove and embedding a protective sleeve 134 in the groove, the weak-point shear pin 130 can be effectively protected, preventing it from being eroded and damaged by external sediment, blocking the erosion of dust, water vapor, etc., and extending its service life.

[0058] Example 5

[0059] See Figure 1 , in the embodiment of the present utility model, the second connection through hole is a stepped through hole.

[0060] In this embodiment, the second connection through hole is a stepped through hole. It should be explained that the number of steps of the stepped through hole is two. It is easy to understand that the cross-sectional shape of the two-step stepped through hole is T-shaped. The second connection through hole specifically includes an upper connection cavity and a lower connection cavity. The inner diameter of the upper connection cavity is larger than that of the lower connection cavity. After the weak-current shear pin is embedded in the lower connection cavity, the sealing performance between the weak-point shear pin 130 and the shear cone sleeve 120 can be ensured.

[0061] In this embodiment, the second connection through hole is a stepped through hole. On the one hand, it can play a positioning role when installing the weak-current shear pin, facilitating the installation of the weak-point shear pin 130; on the other hand, the weak-current shear pin is embedded and connected with the lower connection cavity, which can ensure the sealing performance between the weak-point shear pin 130 and the shear cone sleeve 120 and extend the service life of the device.

[0062] Example 6

[0063] SeeFigure 1 , in the embodiment of the present utility model, a conical guiding groove 111 is provided at the rear end of the shearing cone sleeve 120.

[0064] In this embodiment, a conical guiding groove 111 is provided at the rear end of the shearing cone sleeve 120. Since the conical design can gradually expand the channel diameter, the guiding groove 111 can reduce the entry resistance of the cable, making it easier for the cable to penetrate, avoiding the cable from being stuck or broken due to the small channel diameter, saving construction time and improving operation efficiency.

[0065] In the description of this specification, the description with reference to terms such as "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0066] In addition, the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A new type of single-core cable bridle, characterized in that: include: A bridle base body, a shear cone sleeve is fixed to the front end through a weak point shear pin, and the bridle base body is provided with a first connecting through hole; A shear cone sleeve, wherein a cable connection through hole is provided inside and a second connection through hole corresponding to the first connection through hole is provided on the inner wall; A weak point shear pin is fixed in the first connecting through hole and the second connecting through hole by means of inlaying, a cable protection clamp is provided at the lower end of the weak point shear pin, and the diameter of the weak point shear pin is not larger than the connection column with the cable protection clamp; Wherein, a protective sleeve is fixed on the outer side of the weak point shear pin by means of screws.

2. The new single-core cable bridle according to claim 1 is characterized in that: A shearing sleeve is embedded on the outer side of the weak point shearing pin.

3. The new single-core cable bridle according to claim 2 is characterized in that: The extrusion surface between the protective clamp and the cable at the lower end of the weak point shear pin is in an arc shape.

4. The new single-core cable bridle according to claim 1 is characterized in that: An annular protective embedding groove is provided on the bridle base outside the first connecting through hole.

5. The new single-core cable bridle according to claim 1 is characterized in that: The second connecting through hole is a step through hole.

6. The new single-core cable bridle according to claim 1 is characterized in that: A conical guide groove is arranged at the rear end of the shear cone sleeve.

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