Cable lifting and lowering device and its braking device

Abstract

This invention discloses a cable retrieval device, comprising: a braking device including: a locking disc, a friction plate, a protective cover, at least one adjusting member, a brake lever, and a locking block; the locking disc is mounted on a drum, and its outer periphery is provided with unidirectionally inclined serrations; one end of the adjusting member is disposed on the protective cover, and the other end is disposed on the friction plate, maintaining a certain distance between the friction plate and the drum; the brake lever is hinged to the friction plate; the locking block is connected to the brake lever via a connecting rod; when the brake lever changes from a tensioned state to a relaxed state, the friction plate drives the brake lever to reset under the restoring force of the adjusting member, and the brake lever drives the locking block to contact the locking disc via the connecting rod; when the brake lever changes from a relaxed state to a tensioned state, the brake lever drives the locking block to separate from the locking disc via the connecting rod. The cable retrieval device of this invention can retrieve flexible rope-like objects from underground to the surface or lower them into the well and achieve automatic braking.

Description

Technical Field

[0001] This invention relates to the field of oil and gas extraction equipment technology, and in particular to a cable raising and lowering device and its braking device used in well workover operations. Background Technology

[0002] Oilfield well repair and retrieval operations often require retrieving cables, wire ropes, and other rope-like objects that have fallen into the well. Currently, once these objects are retrieved, they are typically retrieved and deployed manually.

[0003] However, manually retrieving and releasing rope-type objects is not only laborious, time-consuming, and inefficient, but also poses safety hazards and cannot meet the needs of actual production.

[0004] Therefore, it is necessary to develop a specialized tool that can lift or lower flexible rope-like objects from the ground into the well, and achieve automatic braking, eliminating manual labor and improving construction safety and work efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a cable jacking device and its braking device, which can jack up flexible rope-like objects from the ground or lower them into the well and achieve automatic braking, thereby improving construction safety, preventing personnel injury accidents, improving work efficiency, and shortening the construction cycle.

[0006] The above-mentioned objectives of the present invention can be achieved by the following technical solutions:

[0007] A cable lifting device, comprising:

[0008] The braking device includes: a locking disc, friction pads, a protective cover, at least one adjusting element, a brake lever, and a locking block;

[0009] The locking disc is used to be installed on the roller, and the outer periphery of the locking disc is provided with unidirectional inclined serrations;

[0010] One end of the adjusting member is disposed on the protective cover, and the other end is disposed on the friction plate, so that a certain interval distance is maintained between the friction plate and the roller;

[0011] The brake lever and the friction plate are hinged together;

[0012] The locking block is connected to the brake lever via a connecting rod;

[0013] When the brake lever changes from a tightened state to a released state, the friction pad drives the brake lever to reset under the restoring force of the adjusting member, and the brake lever drives the locking block to contact the locking disc through the connecting rod;

[0014] When the brake lever changes from the released state to the tightened state, the brake lever drives the locking block to separate from the locking disc via the connecting rod.

[0015] In a preferred embodiment, the adjusting member comprises a plurality of adjusting members, which are spaced apart along the extension direction of the friction plate.

[0016] In a preferred embodiment, the adjusting element is an adjusting spring.

[0017] In a preferred embodiment, the braking device further includes a positioning part fixed on the base, the positioning part being provided with a pin hole for connecting the friction plate and the brake lever.

[0018] A cable lifting device includes: a braking device, a roller, and a power mechanism. The braking device includes: a locking disc, a friction plate, a protective cover, at least one adjusting element, a brake lever, and a locking block.

[0019] The locking disc is used to be installed on the roller, and the outer periphery of the locking disc is provided with unidirectional inclined serrations;

[0020] One end of the adjusting member is disposed on the protective cover, and the other end is disposed on the friction plate, so that a certain interval distance is maintained between the friction plate and the roller;

[0021] The brake lever and the friction plate are hinged together;

[0022] The locking block is connected to the brake lever via a connecting rod;

[0023] When the brake lever changes from a tightened state to a released state, the friction pad drives the brake lever to reset under the restoring force of the adjusting member, and the brake lever drives the locking block to contact the locking disc through the connecting rod;

[0024] When the brake lever changes from the released state to the tightened state, the brake lever drives the locking block to separate from the locking disc via the connecting rod.

[0025] In a preferred embodiment, the adjusting member comprises a plurality of adjusting members, which are spaced apart along the extension direction of the friction plate.

[0026] In a preferred embodiment, the adjusting element is an adjusting spring.

[0027] In a preferred embodiment, the braking device further includes a positioning part fixed on the base, the positioning part being provided with a pin hole for connecting the friction plate and the brake lever.

[0028] In a preferred embodiment, the power mechanism is a hydraulic pump, which is connected to the roller drive to drive the roller to rotate.

[0029] In a preferred embodiment, the cable lifting device further includes a base, and the locking block is fixed to the base by a pin.

[0030] The features and advantages of this invention are as follows: The cable retrieval device provided in this application mainly improves the braking device. An adjusting member is provided between the protective cover and the friction plate to maintain a certain distance between the friction plate and the drum; the brake lever is hinged to the friction plate; the locking block is connected to the brake lever via a connecting rod; when the brake lever changes from a tensioned state to a release state, the friction plate drives the brake lever to reset under the restoring force of the adjusting member, and the brake lever drives the locking block to contact the locking disc via the connecting rod; when the brake lever changes from a release state to a tensioned state, the brake lever drives the locking block to separate from the locking disc via the connecting rod. The cable retrieval device provided in this application can retrieve flexible rope-like objects from the well to the surface or lower them into the well and achieve automatic braking, improving construction safety, preventing personnel injury accidents, and improving work efficiency and shortening the construction cycle. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a side view of a cable lifting device according to an embodiment of this application;

[0033] Figure 2 This is a front view of a cable lifting device according to an embodiment of this application.

[0034] 1. Lock disk;

[0035] 2. Friction plates;

[0036] 3. Protective cover;

[0037] 4. Adjusting components;

[0038] 5. Brake lever;

[0039] 6. Lock block;

[0040] 7. Roller;

[0041] 8. Hydraulic pump;

[0042] 9. Connecting rod;

[0043] 10. Base. Detailed Implementation

[0044] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art fall within the scope defined by the appended claims.

[0045] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] The purpose of this invention is to provide a cable retrieval device that can retrieve flexible rope-like objects from underground to the surface or lower them into the well and achieve automatic braking, thereby improving construction safety, preventing personnel injury accidents, increasing work efficiency, and shortening the construction cycle.

[0048] Cable retrieval devices are primarily used in oil, gas, and water wells as auxiliary devices at the wellhead for retrieving cables, wire ropes, and other rope-like tools. When retrieving rope-like tools, a fixed pulley is installed at the wellhead, and one end of the rope is passed through the pulley and secured to a drum. The drum has evenly distributed spiral grooves for winding cables or other rope-like objects. A hydraulic pump is located on the lower side of the drum, driven by the hydraulic power source of the workover rig, which in turn rotates the drum.

[0049] Please see Figure 1 and Figure 2 The cable lifting device provided in this application embodiment may include: a braking device, a roller 7, and a power mechanism.

[0050] The braking device includes: a locking disc 1, a friction plate 2, a protective cover 3, at least one adjusting member 4, a brake lever 5, and a locking block 6; the locking disc 1 is mounted on the roller 7, and the outer periphery of the locking disc 1 is provided with unidirectionally inclined serrations; one end of the adjusting member 4 is provided on the protective cover 3, and the other end is provided on the friction plate 2, so that the friction plate 2 and the roller 7 maintain a certain distance; the brake lever 5 is hinged to the friction plate 2; the locking block 6 is connected to the brake lever 5 through a connecting rod 9; when the brake lever 5 changes from a tensioned state to a relaxed state, under the restoring force of the adjusting member 4, the friction plate 2 drives the brake lever 5 to reset, and the brake lever 5 drives the locking block 6 to contact the locking disc 1 through the connecting rod 9; when the brake lever 5 changes from a relaxed state to a tensioned state, the brake lever 5 drives the locking block 6 to separate from the locking disc 1 through the connecting rod 9.

[0051] In the cable lifting device provided in this specification, the braking device has been significantly improved. Specifically, multiple adjusting members 4 can be installed on the cover 3. Specifically, the multiple adjusting members 4 can be spaced apart along the extension direction of the friction plate 2. When the friction plate 2 is generally arc-shaped, the multiple adjusting members 4 can be spaced apart along the circumference of the friction plate 2. Specifically, the adjusting member 4 can be in the form of an adjustable spring. Of course, the adjusting member 4 can also be in other forms that can adjust the restoring force; those skilled in the art can make adaptive replacements or improvements based on this adjusting spring.

[0052] In one implementation, such as Figure 1 As shown, the braking device can be equipped with three adjusting springs. One end of each adjusting spring is fixed to the cover 3, and the other end is hung on the friction plate 2. By adjusting the spring force, a certain distance is maintained between the friction plate 2 and the roller 7.

[0053] The locking disc 1 has evenly distributed unidirectional inclined sawtooth teeth and is fixed to the roller 7. The brake lever 5 and the friction plate 2 can be connected by a pin. The locking block 6 is connected to the brake lever 5 by a connecting rod 9. The locking block 6 can be fixed to the base 10 by a pin, and pulling the brake lever 5 back and forth will move the locking block 6 back and forth.

[0054] When lifting rope tools, releasing the brake lever 5 causes the friction plate 2 to cause the brake lever 5 to rebound under the action of the adjusting spring. The brake lever 5, through the connecting rod 9, causes the locking block 6 to contact the locking disc 1. The roller 7 drives the locking disc 1 to rotate. Although the unidirectional inclined sawtooth on the disc is in contact with the locking block 6, it does not affect the rotation. Once the lifting stops, the rope tool, relying on its own weight, drives the roller 7 to rotate in the opposite direction, and the locking block 6 engages with the sawtooth of the locking disc 1, achieving automatic braking.

[0055] When lowering rope-type tools, tighten the brake lever 5. The brake lever 5, through the connecting rod 9, causes the locking block 6 to separate from the locking disc 1. The rope's own weight drives the drum 7 to rotate, continuously lowering it into the well. When the speed is too high and speed control is needed, continue tightening the brake lever 5, causing the friction plate 2 to engage with the drum 7. The degree of engagement can be adjusted by tightening the brake lever 5 to achieve the desired lowering speed. To stop lowering, release the brake lever 5; the locking block 6 engages with the serrated edge of the locking disc 1, achieving automatic braking.

[0056] In one embodiment, the braking device may further include a positioning part fixed to the base 10. The positioning part is provided with a pin hole for connecting the friction plate 2 and the brake lever 5. Specifically, during installation, the base 10 may be provided with a positioning part, which may be provided with a pin hole. The brake lever 5 may be provided with a mating part for inserting into the pin hole. When the brake lever 5 is operated, the brake lever 5 can rotate relative to the pin hole of the positioning part, thereby driving the friction plate 2 to rotate.

[0057] In one embodiment, the power mechanism can be a hydraulic pump 8, which is connected to the roller 7 for driving the roller 7 to rotate. When the power mechanism is a hydraulic pump 8, it can provide a stable driving force to the roller 7.

[0058] In one embodiment, the cable lifting device further includes a base 10, and the locking block 6 is fixed to the base 10 by a pin. When the locking block 6 is fixed to the base 10 by the pin, the locking block 6, which is connected to the brake lever 5 via the connecting rod 9, can be driven to move back and forth when the brake lever 5 is pulled. The back and forth movement of the locking block 6 can lock and release the locking disc 1.

[0059] The cable retrieval device provided in this application mainly improves the braking device. An adjusting element 4 is installed between the protective cover 3 and the friction plate 2 to maintain a certain distance between the friction plate 2 and the drum 7. The brake lever 5 is hinged to the friction plate 2. The locking block 6 is connected to the brake lever 5 via a connecting rod 9. When the brake lever 5 changes from a tensioned state to a relaxed state, the friction plate 2 drives the brake lever 5 to reset under the restoring force of the adjusting element 4. The brake lever 5 then drives the locking block 6 to contact the locking disc 1 via the connecting rod 9. When the brake lever 5 changes from a relaxed state to a tensioned state, the brake lever 5 drives the locking block 6 to separate from the locking disc 1 via the connecting rod 9. The cable retrieval device provided in this application can retrieve flexible rope-like objects from the well to the surface or lower them into the well and achieve automatic braking, improving construction safety, preventing personnel injuries, increasing work efficiency, and shortening the construction cycle.

[0060] Any numerical values ​​cited herein include all values ​​ranging from a lower limit to an upper limit, increasing by one unit, with at least two units between any lower and any higher value. For example, if the quantity of a component or a process variable (e.g., temperature, pressure, time, etc.) is described as ranging from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, it is intended to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in this specification. For values ​​less than 1, a unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1, etc. These are merely examples intended for explicit expression, and it can be assumed that all possible combinations of values ​​listed between the minimum and maximum values ​​are similarly explicitly stated in this specification.

[0061] Unless otherwise stated, all ranges include the endpoints and all numbers between them. The terms "approximately" or "about" used with ranges apply to both endpoints of the range. Thus, "approximately 20 to 30" is intended to cover "approximately 20 to approximately 30," including at least the specified endpoints.

[0062] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified elements, components, parts, or steps, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional.

[0063] Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of "a" or "an" to describe an element, component, part, or step does not imply the exclusion of other elements, components, parts, or steps.

[0064] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0065] The above descriptions are merely a few embodiments of the present invention. Although the embodiments disclosed in the present invention are as described above, the content is only for the purpose of facilitating understanding of the present invention and is not intended to limit the present invention. Any person skilled in the art to which this invention pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in the present invention. However, the patent protection scope of the present invention shall still be determined by the scope defined in the appended claims.

Claims

1. A braking device for a cable lifting and lowering device, characterized in that, The cable hoisting device is used in oil and gas wells, and the braking device includes: a locking disc, friction pads, a protective cover, at least one adjusting element, a brake lever, and a locking block; The locking disc is used to be installed on the roller, and the outer periphery of the locking disc is provided with unidirectional inclined serrations; One end of the adjusting member is disposed on the protective cover, and the other end is disposed on the friction plate, so that a certain interval distance is maintained between the friction plate and the roller; The brake lever and the friction plate are hinged together; The locking block is connected to the brake lever via a connecting rod; When the brake lever changes from a tightened state to a released state, the friction pad drives the brake lever to reset under the restoring force of the adjusting member, and the brake lever drives the locking block to contact the locking disc through the connecting rod; When the brake lever changes from the released state to the tightened state, the brake lever drives the locking block to separate from the locking disc through the connecting rod; When lifting the rope tool, the brake lever is released, and the friction plate causes the brake lever to rebound under the action of the adjusting component. The brake lever, through the connecting rod, causes the locking block to contact the locking disc. The roller drives the locking disc to rotate, and the unidirectional inclined serrations on the locking disc engage with the locking block without affecting the rotation. Once the lifting stops, the rope tool, relying on its own weight, drives the roller to rotate in the opposite direction, and the locking block engages in the serrations of the locking disc, achieving automatic braking. When lowering rope-type tools, tighten the brake lever, which, through the connecting rod, causes the locking block to separate from the locking disc; the rope's own weight drives the drum to rotate, continuously lowering it into the well; when speed control is needed, continue tightening the brake lever, causing the friction plate to engage with the drum; the degree of engagement is adjusted by regulating the brake lever's force, thus regulating the lowering speed; when it is necessary to stop lowering, release the brake lever, and the locking block engages with the serrations of the locking disc, achieving automatic braking.

2. The braking device of the cable lifting and lowering device as described in claim 1, characterized in that, The adjusting element comprises multiple elements, which are spaced apart along the extension direction of the friction plate.

3. The braking device of the cable lifting and lowering device as described in claim 2, characterized in that, The adjusting element is an adjusting spring.

4. The braking device of the cable lifting and lowering device as described in claim 1, characterized in that, The braking device also includes a positioning part fixed on the base, and the positioning part is provided with a pin hole for connecting the friction plate and the brake lever.

5. A cable lifting and lowering device, characterized in that, The cable hoisting device is used in oil and gas wells, and includes a braking device, a drum, and a power mechanism. The braking device includes: a locking disc, friction pads, a protective cover, at least one adjusting element, a brake lever, and a locking block; The locking disc is used to be installed on the roller, and the outer periphery of the locking disc is provided with unidirectional inclined serrations; One end of the adjusting member is disposed on the protective cover, and the other end is disposed on the friction plate, so that a certain interval distance is maintained between the friction plate and the roller; The brake lever and the friction plate are hinged together; The locking block is connected to the brake lever via a connecting rod; When the brake lever changes from a tightened state to a released state, the friction pad drives the brake lever to reset under the restoring force of the adjusting member, and the brake lever drives the locking block to contact the locking disc through the connecting rod; When the brake lever changes from the released state to the tightened state, the brake lever drives the locking block to separate from the locking disc through the connecting rod; When lifting the rope tool, the brake lever is released, and the friction plate causes the brake lever to rebound under the action of the adjusting component. The brake lever, through the connecting rod, causes the locking block to contact the locking disc. The roller drives the locking disc to rotate, and the unidirectional inclined serrations on the locking disc engage with the locking block without affecting the rotation. Once the lifting stops, the rope tool, relying on its own weight, drives the roller to rotate in the opposite direction, and the locking block engages in the serrations of the locking disc, achieving automatic braking. When lowering rope-type tools, tighten the brake lever, which, through the connecting rod, causes the locking block to separate from the locking disc; the rope's own weight drives the drum to rotate, continuously lowering it into the well; when speed control is needed, continue tightening the brake lever, causing the friction plate to engage with the drum; the degree of engagement is adjusted by regulating the brake lever's force, thus regulating the lowering speed; when it is necessary to stop lowering, release the brake lever, and the locking block engages with the serrations of the locking disc, achieving automatic braking.

6. The cable lifting device as described in claim 5, characterized in that, The adjusting element comprises multiple elements, which are spaced apart along the extension direction of the friction plate.

7. The cable lifting device as described in claim 6, characterized in that, The adjusting element is an adjusting spring.

8. The cable lifting device as described in claim 5, characterized in that, The cable lifting device also includes a base, and the locking block is fixed to the base by a pin.

9. The cable lifting device as described in claim 8, characterized in that, The braking device also includes a positioning part fixed on the base, and the positioning part is provided with a pin hole for connecting the friction plate and the brake lever.

10. The cable lifting device as described in claim 5, characterized in that, The power mechanism is a hydraulic pump, which is connected to the drum drive and is used to drive the drum to rotate.

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