Pneumatic elevator for lifting tubular column

Abstract

The utility model belongs to the technical field of petroleum drilling operation, and discloses a pneumatic elevator for lifting a tubular column, which comprises an elevator main body, a crescent block and a pneumatic motor, the center of the elevator main body is provided with a core column, the outer side of the core column is provided with a crescent groove, and the crescent block is arranged in the groove. The crescent block is a crescent-shaped component with an opening, an incomplete gear is arranged on the outer side of the crescent block, and the included angle between the two ends of the gear and the center exceeds the needed rotation angle. The pneumatic motor is installed on the elevator body, a driving gear is installed on an output shaft of the pneumatic motor, the driving gear penetrates through a notch in the side face of the elevator body and is meshed with teeth of the crescent block, and the pneumatic motor controls the crescent block to rotate so as to open and close the tubular column. Transmission is carried out through the gear pair, the limiting block is arranged to control the rotation angle, the position of the crescent can be accurately judged by feeding back signals through the proximity switch, the crescent is prevented from being clamped and not running in place, automatic elevator control is achieved, and rapidness and convenience are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil drilling operations, and in particular relates to a pneumatic elevator for lifting and lowering a pipe column. Background Art

[0002] Elevators are tools used for drilling, completion and repairing in oil and gas production. Elevators are suspended on lifting rings and are used to hang pipes. They can hold drill pipes, casings, tubing and other pipes to lift or lower them. Elevators hang tubings and sink them into the oil well, or pull them out of the oil well to the ground. When lifting and lowering the tubing, hang lifting rings on both sides of the elevator, install the elevator safety pin, buckle the elevator on the tubing, close the opening of the elevator, and the tubing coupling on the top of the tubing is stuck by the elevator. The tubing can be lifted or lowered by lifting the elevator.

[0003] Existing elevators, such as the oil pipe elevator body with reduced operation steps disclosed in Chinese invention patent CN106382101B, require manual rotation of the lock pin handle when opening and closing the elevator, so that the lock pin handle rotates on the elevator, thereby rotating the crescent in the crescent groove to achieve the action of opening and closing the elevator. This method is time-consuming and labor-intensive, and it is difficult to quickly and efficiently complete the opening and closing of the elevator under some working conditions that are not convenient for manual operation. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the problem to be solved by the utility model is that the traditional elevator needs to manually rotate the lock pin handle, which is time-consuming and labor-intensive, and cannot realize remote control automatic opening and closing. The utility model provides a pneumatic elevator for pipe column lifting and lowering, which adopts pneumatic method to control the opening and closing state of the elevator, can be remotely operated, and is convenient and efficient.

[0005] In order to achieve the above object, the utility model provides a pneumatic elevator for lifting and lowering a pipe column, comprising: an elevator body, a crescent block, and a pneumatic motor. A core column is arranged at the center of the elevator body, a crescent-shaped groove is arranged on the outer side of the core column, and a crescent block is installed in the groove.

[0006] The crescent block is a crescent-shaped component with an opening, an incomplete gear is arranged on the outside, and the angle between the two ends of the gear and the center exceeds the required rotation angle.

[0007] The pneumatic motor is mounted on the elevator body, and a driving gear is mounted on the output shaft of the pneumatic motor. The driving gear passes through the notch on the side of the elevator body, and the driving gear meshes with the teeth of the crescent block. The pneumatic motor controls the crescent block to rotate so as to open and close the pipe column.

[0008] According to another embodiment of the utility model or the driving device of any of the aforementioned embodiments, it also includes a limit block, a notch is set on the crescent block, the limit block is detachably installed on the elevator body, the limit block passes through the notch, and limits the rotation angle when the pneumatic motor drives the crescent block to rotate.

[0009] According to another embodiment of the utility model or the driving device of any of the aforementioned embodiments, it also includes proximity switches, there are two proximity switches, which are contactless type, and the sensing signal is fed back to the control circuit to control the indicator light state or give a signal for the next operation.

[0010] According to a driving device according to another embodiment of the present invention or any of the aforementioned embodiments, the proximity switch is arranged below the driving gear, and the driving gear is provided with a groove for the proximity switch to detect the stroke.

[0011] According to another embodiment of the utility model or a driving device of any of the aforementioned embodiments, the proximity switch is arranged below the driving gear, a follower gear is fixedly installed under the driving gear, and the follower gear is provided with a notch for the proximity switch to detect the stroke.

[0012] According to another embodiment of the utility model or the driving device of any of the aforementioned embodiments, it further includes a manual reversing valve, and the manual reversing valve controls the direction and opening and closing of the starter motor.

[0013] According to another embodiment of the utility model or the driving device of any of the aforementioned embodiments, it further comprises a support plate, the support plate is vertically mounted on the side of the elevator body, and the pneumatic motor is mounted on the support plate.

[0014] Beneficial effects of the utility model:

[0015] The pneumatic elevator for pipe column lifting and lowering of the utility model adopts a pneumatic motor to drive the crescent block to rotate, thereby clamping and releasing the pipe columns such as drill pipes, casings and oil pipes. The transmission is carried out through a gear pair, a limit block is set to control the rotation angle, and a proximity switch feeds back a sensing signal to realize automatic control of the elevator, which is fast and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the pneumatic elevator for lifting and lowering a pipe column according to the utility model in an open state;

[0017] Figure 2 It is a cross-sectional schematic diagram of the pneumatic elevator for lifting and lowering a pipe column according to the utility model;

[0018] Figure 3 It is a top view schematic diagram of the follower gear described in the utility model;

[0019] Figure 4It is a top view schematic diagram of the pneumatic elevator for lifting and lowering the pipe string according to the utility model;

[0020] Figure 5 It is a three-dimensional schematic diagram of the pneumatic elevator for lifting and lowering a pipe string according to the utility model in a closed state;

[0021] Figure 6 It is an exploded schematic diagram of the assembly of the pneumatic elevator for pipe string lifting in the closed state according to the utility model;

[0022] In the figure: 1. Elevator body; 2. Crescent block; 3. Limit block; 4. Driving gear; 5. Core column; 6. Pneumatic motor; 7. Proximity switch; 8. Follower gear. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] like Figure 1 As shown, a pneumatic elevator for lifting and lowering a pipe column comprises: an elevator body 1, a crescent block 2, and a pneumatic motor 6. A core column 5 is arranged at the center of the elevator body 1, a crescent-shaped groove is arranged on the outer side of the core column 5, and the crescent block 2 is installed in the groove.

[0026] like Figure 3 , 5 As shown, the crescent block 2 is a crescent-shaped component with an opening, an incomplete gear is arranged on the outside, and the angle between the two ends of the gear and the center exceeds the required rotation angle. A notch is arranged on the crescent block 2, and the limit block 3 is detachably mounted on the elevator body 1. The limit block 3 passes through the notch to limit the rotation angle when the pneumatic motor 6 drives the crescent block 2 to rotate.

[0027] like Figure 2 , 4 As shown, the support plate is vertically mounted on the side of the elevator body 1, and the pneumatic motor 6 is mounted on the support plate. A driving gear 4 is mounted on the output shaft of the pneumatic motor 6, and the driving gear 4 passes through the notch on the side of the elevator body 1. The driving gear 4 meshes with the teeth of the crescent block 2. The pneumatic motor 6 controls the crescent block 2 to rotate so as to open and close the pipe column, and the manual reversing valve controls the direction and opening and closing of the starter motor. There are two proximity switches 7, which are mounted on both sides of the pneumatic motor 6. The proximity switches 7 are contactless, and the sensing signal is fed back to the control circuit to control the indicator light state or the next operation, providing safety instructions.

[0028] like Figure 2 , 3 As shown, the proximity switch 7 is arranged below the driving gear 4 , and a follower gear 8 is fixedly mounted below the driving gear 4 . The follower gear 8 is provided with a notch for the proximity switch 7 to detect the stroke.

[0029] Embodiment 2:

[0030] The other mechanisms are the same as those in the first embodiment, except that Figure 5 , 6 As shown, the proximity switch 7 is arranged below the driving gear 4 , and the driving gear 4 is provided with a groove for the proximity switch 7 to detect the stroke.

[0031] The working principle of this utility model:

[0032] The pneumatic elevator of the utility model mainly consists of an elevator body 1, a crescent block 2 with an incomplete gear, a driving gear 4, a pneumatic motor 6, a limit block 3, a manual reversing valve, etc. The limit block 3 is a fixed gasket for controlling the gear to be in place. The material of the elevator body 1 is 35Crmo, and the hardness is between HB280-310 after heat treatment. The materials of the crescent block 2 and the driving gear 4 are both 20Crmnti, and the surface quenching is 58-61HRC.

[0033] Taking the diameter of 75mm as an example, the applicable pipe column is: 2 7 / 8″, the rated load is: 100t, and the main body shape is: 450X176X250.

[0034] The working state of the elevator is divided into closed state, open state, and disconnected air pressure state, which are switched by a manual reversing valve. The difference between this series of elevators and ordinary elevators is that it is designed with a gear pair limit protection device, that is, a limit block 3. The limit block 3 is clamped in the groove of the crescent block 2 and stops rotating when it reaches the specified state. The pneumatic motor 6 provides a driving torque to rotate the drive gear 4 to drive the crescent block 2 to rotate. Since the working environment has oil, the crescent block 2 can rotate freely around the core column 5. The crescent block 2 is provided with incomplete external teeth, and the drive gear 4 can be complete external teeth or incomplete external teeth. The induction signal is fed back to the control circuit by controlling the contactless proximity switch 7 on both sides of the pneumatic motor 6. The red indicator light can be set to be on in the closed state, and the green indicator light can be set to be on in the open state.

[0035] Before use, the technicians at the well site should understand the principle of the elevator device, formulate a reasonable operation plan, and check whether the rotating parts of the elevator are flexible. Select the tools, utensils and equipment required for the operation, and check the technical performance of the tools, utensils and equipment used. The rated load of the elevator must be greater than the weight of the drill string, and the diameter of the elevator must match the diameter of the drill string used. Check whether the driving air circuit of the device is connected, whether the pneumatic joints, valve body, and valve core are intact, and whether the air circuit pressure is sufficient.

[0036] The above shows and describes the basic principles, main features and advantages of the utility model. The technicians in this industry should understand that the above implementation is only to illustrate the technical concept and characteristics of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it, and it cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A pneumatic elevator for lifting and lowering a pipe column, characterized in that: include: An elevator body (1), a crescent block (2), and a pneumatic motor (6). The elevator body (1) is provided with a core column (5) at its center, a crescent-shaped groove is provided on the outside of the core column (5), and the crescent block (2) is installed in the groove. The crescent block (2) is a crescent-shaped component with an opening, an incomplete gear is arranged on the outside, and the angle between the two ends of the gear and the center exceeds the required rotation angle. The pneumatic motor (6) is mounted on the elevator body (1), and a driving gear (4) is mounted on the output shaft of the pneumatic motor (6). The driving gear (4) passes through a notch on the side of the elevator body (1), and the driving gear (4) meshes with the teeth of the crescent block (2). The pneumatic motor (6) controls the crescent block (2) to rotate, thereby opening and closing the pipe column; It also comprises a limit block (3), a notch is arranged on the crescent block (2), the limit block (3) is detachably mounted on the elevator body (1), and the limit block (3) passes through the notch to limit the rotation angle when the pneumatic motor (6) drives the crescent block (2) to rotate.

2. A pneumatic elevator for lifting and lowering a pipe column according to claim 1, characterized in that: It also includes proximity switches (7). There are two proximity switches (7) which are contactless type. The sensing signal is fed back to the control circuit to control the state of the indicator light or give a signal for the next operation.

3. A pneumatic elevator for lifting and lowering a pipe column according to claim 2, characterized in that: The proximity switch (7) is arranged below the driving gear (4), and the driving gear (4) is provided with a groove for the proximity switch (7) to detect the stroke.

4. A pneumatic elevator for lifting and lowering a pipe column according to claim 2, characterized in that: The proximity switch (7) is arranged below the driving gear (4), a follower gear (8) is fixedly mounted below the driving gear (4), and the follower gear (8) is provided with a notch for detecting the stroke of the proximity switch (7).

5. A pneumatic elevator for lifting and lowering a pipe column according to claim 1, characterized in that: The utility model also comprises a manual reversing valve, wherein the manual reversing valve controls the direction and the opening and closing of the starter motor.

6. A pneumatic elevator for lifting and lowering a pipe column according to claim 1, characterized in that: It also includes a support plate, which is vertically mounted on the side of the elevator body (1), and the pneumatic motor (6) is mounted on the support plate.

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