Hydraulic elevator for oil drilling

Abstract

The utility model provides a kind of hydraulic elevator of petroleum drilling, it is related to petroleum drilling technology field, mainly used to solve the existing turnover type hydraulic elevator structure complex, the problem of inconvenient installation of lifting ring.This petroleum drilling hydraulic elevator includes elevator main body, movable door, supplement core, lifting ring, lifting lug and safety block hook, two guide pillars are horizontally provided on lifting ring, a slider is slidably arranged on two guide pillars, hydraulic motor is connected at the lower end of slider, hydraulic motor is coaxially arranged with lifting lug, and the output end of hydraulic motor has key connection transmission structure compatible with lifting lug.When hydraulic motor is separated from lifting lug, it is convenient to realize the installation of lifting ring in lifting lug;When hydraulic motor is combined with lifting lug, the turnover of hydraulic elevator can be realized.The utility model structure is simple, convenient to operate, and can balance partial load torque, avoid the bending and partial swing of lifting rod.

Description

Technical Field

[0001] This utility model specifically relates to a hydraulic lifting clamp for oil drilling, and pertains to the field of oil drilling and production technology. Background Technology

[0002] See attached document Figure 1 In oil drilling and production operations, hydraulic lifting clamps are mainly used to lift drill pipes, tubing, and other tubing strings. A hydraulic lifting clamp mainly consists of a clamp body 1, a movable door, a core, lifting lugs 2, and a safety hook 3. Lifting lugs 2 are used to connect to lifting rings 5, and the safety hook 3 is used to prevent the lifting rings 5 ​​from detaching from the lifting lugs 5.

[0003] Currently, most hydraulic lifting clamps cannot be rotated, which hinders the automation of drilling operations. Patent application number 201621348663.3 discloses a reversible hydraulic lifting clamp for oil drilling rigs. Although this hydraulic lifting clamp can rotate, it suffers from problems such as complex structure and the inability of the rotating cylinder to disengage from the hydraulic lifting clamp, leading to inconvenience in installing the lifting ring. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model discloses a hydraulic lifting clamp for oil drilling, employing the following technical solution: A hydraulic lifting clamp for oil drilling includes a clamp body, a movable door, a core filler, a lifting ring, a lifting lug, and a safety hook. Two guide posts are horizontally arranged on the lifting ring, and a slider is slidably arranged on the two guide posts. A hydraulic motor is connected to the lower end of the slider. The hydraulic motor is coaxially arranged with the lifting lug, and the output end of the hydraulic motor has a keyed transmission structure adapted to the lifting lug.

[0005] Further improve the technical solution: The lifting ring is a plate-shaped structure, and two guide posts are vertically fixed on the plate-shaped structure.

[0006] Further improve the technical solution: Set a limit structure at the end of the guide post.

[0007] Further improve the technical solution: mill a key connection structure with two parallel surfaces on the lifting lug.

[0008] Further improvement to the technical solution: A pair of balancing rods are installed on the hydraulic motor.

[0009] Further improve the technical solution: Set a counterweight on the balancing rod.

[0010] After implementing the above technical solution, the beneficial effects of this utility model compared to the prior art are: This utility model features a sliding hydraulic motor. When the hydraulic motor is separated from the lifting lug, it facilitates the installation of the lifting ring inside the lifting lug. When the hydraulic motor is combined with the lifting lug, the hydraulic lifting clamp can be flipped.

[0011] This utility model has a simple structure, is easy to operate, and can balance the off-center load moment, preventing the lifting rod from bending and swaying. Attached Figure Description

[0012] Appendix Figure 1 The diagram shown is a structural schematic of an existing hydraulic lifting clamp.

[0013] Appendix Figure 2 The diagram shown is a structural schematic of the hydraulic lifting clamp before installation.

[0014] Appendix Figure 3 The diagram shows the structure of the lug, guide post, and slider.

[0015] Appendix Figure 4 The diagram shown is a structural schematic of the hydraulic lifting clamp after installation.

[0016] Appendix Figure 5 The diagram shown is a schematic of the structure of this hydraulic lifting clamp after it has been flipped over.

[0017] In the attached diagram: 1. Lifting clamp body; 2. Lifting lug; 3. Safety hook; 4. Lifting rod; 5. Lifting ring; 6. Guide column; 7. Sliding block; 8. Hydraulic motor; 9. Balancing rod; 10. Counterweight; 11. Pipe column. Detailed Implementation

[0018] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. It should be noted that in the description of this utility model, terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation and positional relationship, and therefore should not be construed as a limitation of this utility model. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] A hydraulic lifting clamp for oil drilling is disclosed, relating to the field of oil drilling and production technology. It primarily addresses the problems of complex structures and inconvenient installation of lifting rings in existing reversible hydraulic lifting clamps. The composition and working principle of this invention are described in detail below.

[0020] See attached document Figure 2 The hydraulic lifting clamp of this utility model includes a lifting clamp body 1, a movable door, a core, a lifting lug 2, and a safety hook 3. The lifting clamp body 1, the movable door, and the core are all existing technologies and are used to clamp drill pipes, oil pipes, and other tubing strings 11. The lifting lug 2 is used to connect the lifting ring 5 and the lifting rod 4. The safety hook 3 is used to prevent the lifting ring 5 from falling out of the lifting lug 2.

[0021] To address the problems in the prior art, this invention features two horizontally arranged guide posts 6 on the lifting ring 5, with a slider 7 slidably mounted on each guide post 6. A hydraulic motor 8 is connected to the lower end of the slider 7. The hydraulic motor 8 is coaxially arranged with the lifting lug 2, and its output end has a keyed transmission structure adapted to the lifting lug 2. Moving the slider 7 allows the output end of the hydraulic motor 8 to connect with the lifting lug 2, thereby driving the hydraulic lifting clamp to rotate.

[0022] In this embodiment, a keyed connection structure with two parallel surfaces is milled onto the lifting lug 2. To prevent the slider 7 from falling off the guide post 6, a limit structure is provided at the end of the guide post 6.

[0023] See attached document Figure 3 In this embodiment, the lifting ring 5 is a plate-shaped structure with an annular hole at the bottom and a lifting rod 4 connected to the top. Two guide posts 6 are vertically fixed to the plate-shaped structure of the lifting ring 5.

[0024] Comparison Appendix Figure 2 and attached Figure 4 When installing the lifting ring 5, first slide the slider 7 outward to disengage the output end of the hydraulic motor 8 from the lifting lug 2. Then rotate the safety hook 3 downward to allow the lifting ring 5 to be installed inside the lifting lug 2. Finally, close the safety hook 3.

[0025] When the hydraulic clamp does not need to be flipped, slide the slider 7 outward to disconnect the output end of the hydraulic motor 8 from the lifting lug 2. When the hydraulic clamp needs to be flipped, slide the slider 7 inward to connect the output end of the hydraulic motor 8 to the lifting lug 2. At this time, the lifting ring 5 and the lifting rod 4 bear the eccentric load moment generated by the hydraulic clamp flipping column 11.

[0026] See attached document Figure 5 Although boom 4 is a rigid rod, bending and swaying can still occur when the hydraulic clamp tilts the tubing 11. To balance the off-center load moment, a pair of balancing rods 9 are installed on the hydraulic motor 8. The off-center load moment can be balanced by hand using the balancing rods 9, or by using counterweights, such as suspending counterweights 10 on the balancing rods 9, to balance the off-center load moment and prevent bending and swaying of boom 4.

[0027] It is worth noting that the content not described in detail in the above embodiments is prior art. It is also worth noting that any additions, subtractions, substitutions, and improvements made by those skilled in the art based on the structure and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hydraulic lifting clamp for oil drilling, comprising a clamp body, a movable door, a core filler, a lifting ring, lifting lugs, and a safety hook, characterized in that: Two guide posts are horizontally arranged on the lifting ring, and a slider is slidably arranged on the two guide posts. A hydraulic motor is connected to the lower end of the slider. The hydraulic motor is coaxial with the lifting lug, and the output end of the hydraulic motor has a keyed transmission structure adapted to the lifting lug.

2. The hydraulic lifting clamp for oil drilling as described in claim 1, characterized in that: The lifting ring is a plate-shaped structure, with two guide posts vertically fixed to the plate-shaped structure.

3. The hydraulic lifting clamp for oil drilling as described in claim 1, characterized in that: A limit structure is provided at the end of the guide post.

4. The hydraulic lifting clamp for oil drilling as described in claim 1, characterized in that: A keyed connection structure with two parallel surfaces is milled on the lifting lug.

5. The hydraulic lifting clamp for an oil drill as described in claim 1, characterized in that: A pair of balancing rods are installed on the hydraulic motor.

6. The hydraulic lifting clamp for an oil drill as described in claim 5, characterized in that: A counterweight is installed on the balancing rod.

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