Marine geophysical prospecting instrument cable type rope winding and unwinding device

Abstract

The invention discloses a marine geophysical prospecting instrument cable type winding and unwinding rope holding device which comprises a main cable, a rope clip and an auxiliary cable, the rope clip is detachably connected with the main cable and the auxiliary cable and comprises a first clamping piece and a second clamping piece, and the first clamping piece and the second clamping piece are fixedly connected through a connecting shaft and are kept parallel in the axial direction; each of the first clamping piece and the second clamping piece comprises an upper clamping piece and a lower clamping piece which are oppositely arranged, the upper clamping piece and the lower clamping piece of the first clamping piece form a first holding hole at the first end part, the upper clamping piece and the lower clamping piece of the second clamping piece form a second holding hole at the first end part, the inner diameter of the first holding hole is smaller than the outer diameter of the main cable, and the inner diameter of the second holding hole is smaller than the outer diameter of the main cable. The inner diameter of the second holding hole is larger than the outer diameter of the main cable, and elastic assemblies are arranged at the positions, close to the second end, of the upper clamping piece and the lower clamping piece. The device is suitable for the collecting and releasing operation requirements of all nodes, can meet the requirements of the collecting and releasing operation of the cable type nodes with the water depth of 1000 meters to the picking and hanging device, and is widely applied to seismic exploration and acquisition operation of the nodes in the beach and shallow sea.

Description

Technical Field

[0001] The present invention relates to the technical field of marine seismic exploration, and particularly to a cable-type retractable and cable-gripping device for marine geophysical exploration instruments. Background Art

[0002] Marine seismic exploration is the main means to obtain seismic strata and seabed structures. By using the method of artificial seismic survey in seawater, geological data of the seabed is obtained, and oil and gas reserves are determined through special data processing and interpretation methods. Marine nodes are single and independent autonomous acquisition units. After years of development, they have become the mainstream acquisition method for marine seismic exploration.

[0003] During construction, multiple marine nodes are dropped to the seabed from a node ship according to a predetermined position. Generally speaking, when constructing in waters with a water depth less than 1000 meters, the nodes are connected by ropes. This facilitates retrieving the nodes from the seabed to the node operation ship for data downloading and charging operations, and a large number of marine nodes can be laid on the seabed, thus achieving the acquisition requirements of wide azimuth and high coverage times for seismic exploration.

[0004] Currently, the existing marine node retractable and cable-gripping systems are basically mainly based on the cable-type rope retractable and cable-gripping method, which is a relatively mature solution. Since the existing node and cable detachment and attachment structures basically adopt a C-ring structure, with C-type detachment and attachment rings provided at the node end and the cable end respectively, the degree of freedom of the detachment action is relatively high, manual operation is required, the detachment and attachment time is long, the work efficiency of marine node deployment and recovery is low. At the same time, changing the node deployment spacing is a complicated task, which is not conducive to the operation requirements of changing the node spacing in actual marine node acquisition operations.

[0005] Therefore, there is a need to improve the cable-type retractable and cable-gripping device for marine geophysical exploration instruments in the prior art. Summary of the Invention

[0006] In view of this, the purpose of the embodiments of the present invention is to propose a cable-type retractable and cable-gripping device for marine geophysical exploration instruments.

[0007] For the above purposes, an embodiment of the present invention provides a cable type retractable cable-gripping device for marine geophysical exploration instruments, including a main cable, a cable gripper, and a secondary cable. The first end of the cable gripper is detachably connected to the main cable, and the second end is detachably connected to the secondary cable. The cable gripper includes a first clamping member and a second clamping member. Wherein, the first clamping member and the second clamping member are fixedly connected by a connecting shaft and are arranged parallel to each other axially. Both the first clamping member and the second clamping member include an upper clamping piece and a lower clamping piece arranged opposite to each other. The upper clamping piece and the lower clamping piece of the first clamping member form a first holding hole at the first end, and the upper clamping piece and the lower clamping piece of the second clamping member form a second holding hole at the first end. The inner diameter of the first holding hole is smaller than the outer diameter of the main cable, and the inner diameter of the second holding hole is larger than the outer diameter of the main cable. Elastic components are provided at the positions of the upper clamping piece and the lower clamping piece close to the second end.

[0008] In some embodiments, a connecting ring is provided at the second end of the first clamping member for detachably connecting to the secondary cable.

[0009] In some embodiments, the second ends of each upper clamping piece and each lower clamping piece respectively extend towards the opposite side to form extension parts, and the longitudinal lengths of the upper clamping piece and the lower clamping piece are different.

[0010] In some embodiments, the longitudinal length of the upper clamping piece is greater than that of the lower clamping piece, and a connecting ring is provided on the extension part of the upper clamping piece of the first clamping group to connect the marine node.

[0011] In some embodiments, the elastic component is a plate spring, and the end of the plate spring is fixed to the upper clamping piece by a bolt fastener.

[0012] In some embodiments, in the first clamping member, the first end of the upper clamping piece is set as a semi-circular arc shape, and the first end of the lower clamping piece is set as an inverted semi-circular arc shape. The upper clamping piece and the lower clamping piece are closed in the clamping state to form a first holding hole.

[0013] In some embodiments, the inner hole of the first holding hole is set as an engaging tooth-shaped inner hole.

[0014] In some embodiments, in the second clamping member, the first end of the upper clamping piece is set as a semi-circular arc shape, and the first end of the lower clamping piece is set as an inverted semi-circular arc shape. The upper clamping piece and the lower clamping piece are closed in the clamping state to form a second holding hole.

[0015] In some embodiments, each upper clamping piece is provided with an upper connecting part, and each lower clamping piece is provided with a lower connecting part. In the clamping state, each upper connecting part coincides with each lower connecting part to form a connecting hole, and the connecting shaft respectively passes through the connecting holes to fixedly connect the first clamping member and the second clamping member.

[0016] In some embodiments, the width of the clamping piece of the first clamping member is greater than the width of the clamping piece of the second clamping member.

[0017] The present invention has at least the following beneficial technical effects:

[0018] There is no device on the main cable of the present invention, and a general cable can be used, which meets the requirements of the computer-controlled hanging node spacing, enables automated continuous picking and hanging, and greatly improves the production efficiency of the node retracting and releasing operation; the auxiliary cable structure solves the problem of the compatibility of different types of node retracting and releasing; the design of the first clip and the second clip avoids the situation where the node cannot be recovered in the case of the failure of the first clip, and improves the reliability of node recovery. This device meets the requirements of the retracting and releasing operations of all nodes, can meet the requirements of the retracting and releasing device for cable-type nodes in waters shallower than 1000 meters, and is widely used in the node seismic exploration acquisition operations in shallow waters and shoals. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiments can also be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the installation state of the cable gripper device provided by the present invention;

[0021] Figure 2 Schematic diagram of the cable gripper provided by the present invention;

[0022] Figure 3 Schematic diagram of the first clip and the second clip in the open state provided by the present invention;

[0023] Figure 4 Schematic diagram of the leaf spring provided by the present invention.

[0024] Description of the reference numerals in the drawings:

[0025] 101, main cable; 102, cable gripper; 103, auxiliary cable; 104, ocean node; 105, second clip (safety clip); 106, first clip (main clip); 107, leaf spring; 108, connecting shaft; 109, first holding hole; 110, second holding hole; 111, upper clip; 112, lower clip; 113, extension; 114, connecting ring DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to specific embodiments and the accompanying drawings.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs; the terms used in the specification of this invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the terms "length", "width", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position shown in the drawings, and are only for convenience of description and should not be construed as a limitation to the technical solution of this application.

[0028] The terms "comprising" and "having" and any variations thereof in the specification, claims and above-mentioned drawings of the present invention are intended to cover non-exclusive inclusion; the terms "first", "second", etc. in the specification, claims or above-mentioned drawings of the present invention are used to distinguish different objects and not for describing a specific order. The meaning of "a plurality" is two or more unless specifically and clearly defined otherwise.

[0029] In the specification, claims and above-mentioned drawings of the present invention, when an element is referred to as being "fixed to" or "mounted on" or "disposed on" or "connected to" another element, it can be directly or indirectly located on that other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to that other element.

[0030] In addition, the mention of "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears at various positions in the specification and 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.

[0031] As Figure 1 shown in the schematic diagram of the installation state of the cable-gripping device provided by the present invention, the cable-gripping device includes a main cable 101, a cable gripper 102, and a secondary cable 103. The first end of the cable gripper 102 is detachably connected to the main cable 101, and the second end is detachably connected to the secondary cable 103. The cable-gripping device is a device based on an automated ocean node and cable detachment and attachment. Ocean nodes 104 need to be installed on the main cable 101 at a preset spacing. One end of the cable-gripping device 102 provided by the present invention is connected to the main cable 101, and the other end is connected to the ocean node 104 through the secondary cable 103. Specifically, as Figure 2 shown in the schematic diagram of the embodiment of the cable gripper provided by the present invention, which includes:

[0032] The first clamping member 106 and the second clamping member 105, wherein the first clamping member 106 and the second clamping member 105 are fixedly connected by a connecting shaft 108 and are arranged parallel to each other axially. Both the first clamping member 106 and the second clamping member 105 include an upper clamping piece 111 and a lower clamping piece 112 which are arranged oppositely. The upper clamping piece 111 and the lower clamping piece 112 of the first clamping member 106 form a first holding hole 109 at the first end. The upper clamping piece 111 and the lower clamping piece 112 of the second clamping member 105 form a second holding hole 110 at the first end. The inner diameter of the first holding hole 109 is smaller than the outer diameter of the main cable 101, and the inner diameter of the second holding hole 110 is larger than the outer diameter of the main cable 101. The upper clamping piece 111 and the lower clamping piece 112 are provided with elastic components near the second end.

[0033] Further, the aperture of the first holding hole 109 of the first clamping member 106 in the closed state is smaller than the outer diameter of the main cable 101 in a specific proportion, so as to be able to hold the main cable 101. The inner diameter of the second holding hole 110 is larger than the outer diameter of the main cable 101, so that in the state where the first clamping member 106 fails, the cable gripper device 102 still remains connected to the main cable, so that the cable gripper device 102 can slide along the main cable 101 to the next cable gripper installation position to complete the recovery operation process, improving the reliability of the recovery operation.

[0034] Further, a connecting ring 114 is provided at the second end of the first clamping member 105. In some embodiments, the second ends of each of the upper clamping piece 111 and the lower clamping piece 112 extend towards the opposite side to form an extension part 113, and the longitudinal lengths of the upper clamping piece 111 and the lower clamping piece 112 are different. For example, for the first clamping member, its upper clamping piece 111 extends downward, and the lower clamping piece 112 extends upward to form the extension part 113 respectively. In order to achieve a larger opening angle of the release holding hole of the clamping member, the upper clamping piece 111 and the lower clamping piece 112 are designed to have different longitudinal lengths. In some embodiments, as Figure 2 shown, the longitudinal length of the upper clamping piece 111 is greater than that of the lower clamping piece 112. When the second end of the clamping member is pressed, the lower clamping piece 111 can be retracted into the area surrounded by the upper clamping piece 112 to achieve a larger opening angle. A connecting ring 114 is provided on the extension part 113 of the upper clamping piece 111 of the first clamping member 106 to connect the ocean node 104.

[0035] Further, the elastic component is a plate spring 107. The end of the plate spring 107 is fixed to the upper clamping piece 111 by a bolt fastener. In the state where the main cable 101 is engaged with the cable gripper 102, the elastic force generated by the plate spring 107 causes the main clamping holding hole 109 of the cable gripper 102 to hold the main cable 101, so that the cable gripper 102 maintains its relative position with the main cable 101 and generates a certain separation resistance from the cable to be fixed on the main cable 101. In addition, the plate spring has more durable extrusion resistance and better resilience effect.

[0036] Further, in the first clip 106, the first end of the upper clip 111 is arranged in a semi-circular arc shape, and the first end of the lower clip 112 is arranged in an inverted semi-circular arc shape. The upper clip 111 and the lower clip 112 are closed to form a first holding hole 109 in the clamped state, so as to hold the main cable 101. In some embodiments, the inner hole of the first holding hole 109 is arranged as a meshing tooth-shaped inner hole, and the shape of the meshing tooth-shaped inner hole designed according to the characteristics of the main cable 101 enhances the resistance to the lateral relative displacement of the main cable 101 and the cable gripper 102 in the held state.

[0037] Further, in the second clip 105, the first end of the upper clip 111 is arranged in a semi-circular arc shape, and the first end of the lower clip 112 is arranged in an inverted semi-circular arc shape. The upper clip and the lower clip are closed to form a second holding hole 110 in the clamped state.

[0038] Further, each upper clip 111 is provided with an upper connecting portion, and each lower clip 112 is provided with a lower connecting portion. In the clamped state, each upper connecting portion 111 coincides with each lower connecting portion 112 to form a connecting hole, and the connecting shaft 108 passes through the connecting holes respectively to fixedly connect the first clip 106 and the second clip 105.

[0039] Further, the clip width of the first clip is greater than that of the second clip. The first clip is set as the main clip, and the second clip is set as the safety clip. The greater width of the main clip can better hold the main cable and prevent sliding. The width of the safety clip is smaller, and on the premise of meeting the requirement of hooking the main cable, the size of the cable gripper is reduced as much as possible.

[0040] There is no device on the main cable of the present invention, and a general cable can be used, which meets the requirement of the computer-controlled hanging and mounting node spacing, can realize automatic continuous picking and hanging, and greatly improves the production efficiency of the node retracting and releasing operation. The auxiliary cable structure solves the problem of the compatibility of the retracting and releasing of different types of nodes. The design of the first clip (main clip) and the second clip (safety clip) avoids the situation that the node cannot be recovered in the case of the failure of the main clip, and improves the reliability of the node recovery. This device is applicable to the retracting and releasing operation requirements of all nodes, can meet the requirements of the picking and hanging device for the cable-type node retracting and releasing operation in water depths shallower than 1000 meters, and is widely used in the beach and shallow sea node seismic exploration and acquisition operation.

[0041] The usage method of the cable gripper of the present invention is as follows:

[0042] (1) Node hanging and mounting process

[0043] When the ocean node 104 needs to be hung on the main cable 101, the manipulator in the automatic mode of the detaching and attaching system or the cable releaser in the manual mode applies a certain force at the lower end of the cable gripper 102 to overcome the elastic force of the leaf spring 107, causing the cable holding end to open. After the main cable 101 enters the first cable holding hole 109 and the second cable holding hole 110, the applied force is released to complete the hanging on of the main cable 101.

[0044] (2) Node detachment process

[0045] When the node 104 needs to be detached from the main cable 101, the manipulator in the automatic mode of the detaching and attaching system or the cable releaser in the manual mode applies a certain force at the lower end of the cable gripper 102 to overcome the elastic force of the leaf spring 107, causing the cable holding end to open. The main cable 101 is disengaged from the first cable holding hole 109 and the second cable holding hole 110, and the applied force is released to complete the detachment from the main cable 101.

[0046] The above are the exemplary embodiments disclosed by the present invention. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments disclosed by the present invention as defined by the claims. The functions, steps, and / or actions of the method claims according to the disclosed embodiments herein do not need to be executed in any specific order. In addition, although the elements disclosed by the embodiments of the present invention can be described or claimed in an individual form, they can also be understood as multiple unless explicitly limited to the singular.

[0047] It should be understood that, as used herein, unless the context clearly supports exceptions, the singular form "a" is also intended to include the plural form. It should also be understood that the "and / or" used herein refers to any and all possible combinations of one or more of the related listed items.

[0048] The serial numbers of the disclosed embodiments of the present invention above are only for description and do not represent the superiority or inferiority of the embodiments.

[0049] Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope (including the claims) disclosed by the embodiments of the present invention is limited to these examples; under the concept of the embodiments of the present invention, the technical features between the above embodiments or different embodiments can also be combined, and there are many other variations in different aspects of the above embodiments of the present invention, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention shall be included within the protection scope of the embodiments of the present invention.

Claims

1. An ocean geophysical exploration instrument cable type retracting and releasing cable-gripping device, characterized in that Comprising: A main cable, a cable gripper, and an auxiliary cable. The first end of the cable gripper is detachably connected to the main cable, and the second end is detachably connected to the auxiliary cable. The cable gripper includes a first clip and a second clip. Wherein, the first clip and the second clip are fixedly connected by a connecting shaft and are arranged parallel in the axial direction. Both the first clip and the second clip include an upper clip and a lower clip arranged oppositely. The upper clip and the lower clip of the first clip form a first holding hole at the first end. The upper clip and the lower clip of the second clip form a second holding hole at the first end. The inner diameter of the first holding hole is smaller than the outer diameter of the main cable, and the inner diameter of the second holding hole is larger than the outer diameter of the main cable. Elastic components are provided at the positions of the upper clip and the lower clip close to the second end.

2. The ocean geophysical exploration instrument cable type retracting and releasing cable-gripping device according to claim 1, characterized in that A connecting ring is provided at the second end of the first clip for detachably connecting to the auxiliary cable.

3. The ocean geophysical exploration instrument cable type retracting and releasing cable-gripping device according to claim 2, characterized in that The second ends of each of the upper clip and the lower clip extend towards the opposite side respectively to form extension parts, and the longitudinal lengths of the upper clip and the lower clip are different.

4. The ocean geophysical exploration instrument cable type retracting and releasing cable-gripping device according to claim 3, characterized in that The longitudinal length of the upper clip is greater than that of the lower clip, and a connecting ring is provided on the extension part of the upper clip of the first clip group to connect to the ocean node.

5. The ocean geophysical exploration instrument cable type retracting and releasing cable-gripping device according to claim 1, characterized in that The elastic component is a leaf spring, and the end of the leaf spring is fixed to the upper clip by a bolt fastener.

6. The ocean geophysical exploration instrument cable type retracting and releasing cable-gripping device according to claim 1, characterized in that In the first clip, the first end of the upper clip is set as a semi-circular arc shape, and the first end of the lower clip is set as an inverted semi-circular arc shape. The upper clip and the lower clip are closed in the clamping state to form a first holding hole.

7. The ocean geophysical exploration instrument cable type retracting and releasing cable-gripping device according to claim 6, characterized in that The inner hole of the first holding hole is set as a meshing tooth-shaped inner hole.

8. The ocean geophysical exploration instrument cable type retracting and releasing cable-gripping device according to claim 1, characterized in that In the second clip, the first end of the upper clip is set as a semi-circular arc shape, and the first end of the lower clip is set as an inverted semi-circular arc shape. The upper clip and the lower clip are closed in the clamping state to form a second holding hole.

9. The ocean geophysical exploration instrument cable type retracting and releasing cable-gripping device according to claim 1, characterized in that Each upper clip is provided with an upper connecting part, and each lower clip is provided with a lower connecting part. In the clamping state, each upper connecting part coincides with each lower connecting part to form a connecting hole, and the connecting shaft passes through the connecting holes respectively to fixedly connect the first clip and the second clip.

10. The ocean geophysical exploration instrument cable type retracting and releasing cable-gripping device according to claim 1, characterized in that The clip width of the first clip is greater than the clip width of the second clip.

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