Interlocking control system for power elevator and power slip

Abstract

The invention relates to an interlocking control system for a power elevator and a power slip, which belongs to the field of pneumatic control and comprises an elevator cylinder and a slip cylinder. An elevator one-way valve, an elevator pneumatic control one-way valve and an elevator hand-operated direction valve are sequentially arranged on the first air inlet pipe in the air inlet direction, an elevator stop valve is further arranged on the first air inlet pipe and connected with the elevator pneumatic control one-way valve in parallel, the air outlet end of the elevator air cylinder is connected with a first air outlet pipe, and the air outlet end of the elevator air cylinder is connected with a second air outlet pipe. The first air outlet pipe is connected with an elevator stroke valve and connected with an elevator manual reversing valve through a first branch pipe. By the adoption of the pneumatic principle, reliability of operation under the complex well drilling environment is achieved, and pipeline connection between the control cabinet and the elevator and between the control cabinet and the slip is simplified.

Description

Technical Field

[0001] The invention relates to an interlocking control system for a power elevator and a power slip, and belongs to the field of pneumatic control. Background Art

[0002] During the drilling process, power elevators and power slips (chucks) are important equipment for fixing and lifting pipes. Since elevators and slips usually need to be operated in coordination, in order to prevent accidental contact and misoperation of the equipment, which may lead to safety hazards, interlocking is usually achieved through an integrated electrical control solenoid reversing valve.

[0003] The Chinese invention patent with publication number CN118187806A discloses a power elevator and power slip safety redundant interlocking system, including a control system, the control system is electrically connected to the elevator buckle sensor, elevator load sensor and elevator opening solenoid valve installed on the elevator body, the slip closing sensor, slip load sensor and slip opening solenoid valve installed on the slip body, the control system installed inside the driller's room control cabinet, and the instrument system installed inside the instrument control cabinet. The invention solves the problem that the existing interlocking system cannot determine the correctness of the switch signal and cannot achieve safety interlocking after the sensor fails, improves the system's fault diagnosis capability for the sensor system, realizes safe operation, and achieves the purpose of safe and efficient production. However, in the prior art, due to the shortcomings of electrical flammability, explosion, and susceptibility to interference, the requirements for electrical equipment are extremely high for special working conditions such as high oil and gas concentration and salt spray, and it is difficult to adapt to complex drilling environments.

[0004] Therefore, there is a need for an interlocking control system for power elevators and power slips to achieve reliability in operation under complex drilling environments. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to overcome the deficiencies of the prior art, an interlocking control system for a power elevator and a power slip is provided to achieve operational reliability in a complex drilling environment.

[0006] The technical solution adopted by the present invention to solve the above-mentioned problem is: an interlocking control system for a power elevator and a power slip, comprising an elevator cylinder and a slip cylinder, the air inlet end of the elevator cylinder is connected with a first air inlet pipe, the first air inlet pipe is provided with an elevator one-way valve, an elevator air-controlled one-way valve and an elevator manual reversing valve in sequence along the air inlet direction, the first air inlet pipe is also provided with an elevator stop valve, the elevator stop valve is connected in parallel with the elevator air-controlled one-way valve, the air outlet end of the elevator cylinder is connected with a first air outlet pipe, the first air outlet pipe is connected with an elevator stroke valve, and the first air outlet pipe is connected with the elevator manual reversing valve through a first branch pipe; The air inlet end of the slip cylinder is connected to a second air inlet pipe, on which a slip one-way valve, a slip air-controlled one-way valve and a slip manual reversing valve are sequentially arranged along the air inlet direction, a slip stop valve is also arranged on the second air inlet pipe, and the slip stop valve is connected in parallel with the slip air-controlled one-way valve, the air outlet end of the slip cylinder is connected to a second air outlet pipe, the second air outlet pipe is connected to a slip stroke valve, and the second air outlet pipe is connected to the slip manual reversing valve through a second branch pipe; The elevator stroke valve is connected to the slip air-controlled one-way valve via a first connecting pipe, and the first connecting pipe is provided with an elevator air release valve; The slip travel valve is connected to the elevator air-controlled one-way valve via a second connecting pipe, and a slip air release valve is provided on the second connecting pipe; The air intake end of the first air intake pipe and the air intake end of the second air intake pipe are both connected to an air intake manifold, and the air intake manifold is connected to an air source.

[0007] Preferably, the elevator deflation valve is connected to an elevator signal display.

[0008] Preferably, a slip signal display is connected to the slip vent valve.

[0009] Preferably, a triplet is provided on the air intake manifold.

[0010] Preferably, the triplex consists of three parts: a filter, a pressure regulating valve and a lubricator.

[0011] Preferably, the number of the elevator cylinders and the number of the slip cylinders are both plural.

[0012] Preferably, the number of the elevator cylinders and the number of the slip cylinders are four.

[0013] Preferably, a pressure gauge is provided at the output end of the intake manifold.

[0014] Preferably, the formula for the system pressure and the sizes of the elevators and slips is P=aD, where P represents the system pressure, a represents the coefficient, and D represents the diameter of the elevators and slips.

[0015] Preferably, a is 0.6.

[0016] Compared with the prior art, the advantages of the present invention are: The invention discloses an interlocking control system for a power elevator and a power slip, which adopts a pneumatic principle, realizes the reliability of operation in a complex drilling environment, and simplifies the pipeline connection between a control cabinet and the elevator and the slip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram of an interlocking control system for a power elevator and a power slip of the present invention; Figure 2 It is the control flow chart of clamping state; Figure 3 This is the control flow chart for the unclamped state.

[0018] in: Elevator cylinder 1, slip cylinder 2, air intake manifold 3, air source 4, triple joint 5, pressure gauge 6; A first air inlet pipe 101, an elevator check valve 102, an elevator pneumatic check valve 103, an elevator manual reversing valve 104, an elevator stop valve 105, a first air outlet pipe 106, an elevator stroke valve 107, a first branch pipe 108, a first connecting pipe 109, an elevator deflation valve 110, and an elevator signal display 111; The second air inlet pipe 201, the slip one-way valve 202, the slip air-controlled one-way valve 203, the slip manual reversing valve 204, the slip stop valve 205, the second air outlet pipe 206, the slip stroke valve 207, the second branch pipe 208, the second connecting pipe 209, the slip air release valve 210, and the slip signal display 211. DETAILED DESCRIPTION

[0019] like Figure 1-3 As shown, an interlocking control system for a power elevator and a power slip in this embodiment includes an elevator cylinder 1 and a slip cylinder 2, the number of the elevator cylinder 1 and the number of the slip cylinder 2 are both multiple, and the number of the elevator cylinder 1 and the number of the slip cylinder 2 are specifically four; The air inlet end of the elevator cylinder 1 is connected with a first air inlet pipe 101, on which an elevator one-way valve 102, an elevator pneumatic one-way valve 103 and an elevator manual reversing valve 104 are sequentially arranged along the air inlet direction, and an elevator stop valve 105 is also arranged on the first air inlet pipe 101, and the elevator stop valve 105 is connected in parallel with the elevator pneumatic one-way valve 103. The air outlet end of the elevator cylinder 1 is connected with a first air outlet pipe 106, on which an elevator stroke valve 107 is connected, and the first air outlet pipe 106 is connected to the elevator manual reversing valve 104 through a first branch pipe 108; The air inlet end of the slip cylinder 2 is connected with a second air inlet pipe 201, on which a slip one-way valve 202, a slip air-controlled one-way valve 203 and a slip manual reversing valve 204 are sequentially arranged along the air inlet direction, and a slip stop valve 205 is also arranged on the second air inlet pipe 201, and the slip stop valve 205 is connected in parallel with the slip air-controlled one-way valve 203, and the air outlet end of the slip cylinder 2 is connected with a second air outlet pipe 206, on which a slip stroke valve 207 is connected, and the second air outlet pipe 206 is connected with the slip manual reversing valve 204 through a second branch pipe 208; The elevator stroke valve 107 is connected to the slip gas-controlled one-way valve 203 through a first connecting pipe 109, and an elevator deflation valve 110 is provided on the first connecting pipe 109, and an elevator signal display 111 is connected to the elevator deflation valve 110; The slip stroke valve 207 is connected to the elevator pneumatic one-way valve 103 via a second connecting pipe 209, a slip venting valve 210 is provided on the second connecting pipe 209, and a slip signal display 211 is connected to the slip venting valve 210; The air inlet end of the first air inlet pipe 101 and the air inlet end of the second air inlet pipe 201 are both connected to the air inlet manifold 3, the air inlet manifold 3 is connected to the air source 4, and a triplet 5 is arranged on the air inlet manifold 3. Here, the triplet 5 consists of three parts: a filter, a pressure regulating valve and a lubricator. The filter is used to remove impurities and moisture in the air to ensure that the air entering the pneumatic system is clean. The pressure regulating valve is used to adjust the pressure of the gas to ensure that the air pressure in the system is stable within a set range. The lubricator provides lubricating oil for the pneumatic components to ensure that the pneumatic components are sufficiently lubricated during operation, thereby reducing wear and friction and extending the life of the equipment. The output end of the intake manifold 3 is provided with a pressure gauge 6, through which the air pressure is detected; The interlock control system is installed in the control area of ​​the drilling platform. The elevator cylinder 1 is connected to the elevator. The elevator is opened and clamped by extending and retracting the elevator cylinder 1. The slip cylinder 2 is connected to the slip. The slip is opened and clamped by extending and retracting the slip cylinder 2. The control personnel manually controls the elevator stop valve 105 and the slip stop valve 205 to close to control the interlock between the elevator and the slip, that is, the interlock function is turned on; the control personnel manually controls the elevator stop valve 105 and the slip stop valve 205 to open to control the action of the elevator or the slip alone, that is, the interlock function is released; The interlock control system retracts the elevator cylinder 1 or the slip cylinder 2, and opens the elevator stroke valve 107 or the slip stroke valve 207 through a mechanical connection; When the elevator stroke valve 107 is opened, the slip gas-controlled one-way valve 203 is opened, and the gas enters the slip manual reversing valve 204, thereby controlling the slip cylinder 2 to extend and realize the slip opening; When the slip stroke valve 207 is opened, the elevator pneumatic control check valve 103 is opened, and the gas enters the elevator manual reversing valve 104, thereby controlling the elevator cylinder 1 to extend, and the elevator is opened; That is, the elevator cylinder 1 and the slip cylinder 2 can be retracted at the same time, but cannot be extended at the same time. Specifically, the elevator cylinder 1 and the slip cylinder 2 are two types of cylinders, one of which can be extended only when the other cylinder is fully retracted; The slips or elevators can confirm the signal clamping position by adjusting the position of the slip travel valve 207 or the elevator travel valve 107; The extension and retraction of the slip cylinder 2 and the elevator cylinder 1 are controlled by the slip manual reversing valve 204 and the elevator manual reversing valve 104 .

[0020] When the slip manual reversing valve 204 and the elevator manual reversing valve 104 control the slip cylinder 2 and the elevator cylinder 1 to retract and do not touch the slip stroke valve 207 or the elevator stroke valve 107, at this moment, the elevator pneumatic check valve 103 or the slip pneumatic check valve 203 does not work, that is, the elevator pneumatic check valve 103 or the slip pneumatic check valve 203 is closed, and the gas cannot pass through the pipelines, so the pneumatic components cannot be operated. When the slip cylinder 2 and the elevator cylinder 1 continue to retract and touch the slip stroke valve 207 or the elevator stroke valve 107, at this moment, the slip pneumatic check valve or the slip pneumatic check valve 203 is opened, and the gas passes through the pipeline to operate the pneumatic components.

[0021] The elevator signal display 111 and the slip signal display 211 display colors when there is gas flowing in, and do not display colors when there is gas flowing out; In the clamping state, the elevator stroke valve 107 or the slip stroke valve 207 is touched. At this moment, the touched elevator stroke valve 107 or the slip stroke valve 207 is opened, and the gas passes through the elevator air release valve 110 or the slip air release valve 210. At this moment, the elevator signal display 111 and the slip signal display 211 display colors, that is, the clamping state is met and a signal is displayed.

[0022] When the elevator manual reversing valve 104 or the slip manual reversing valve 204 controls the elevator cylinder 1 or the slip cylinder 2 to extend, at this moment, the elevator stroke valve 107 or the slip stroke valve 207 is touched to close, and the original elevator signal display 111 and the slip signal display 211 show the internal air pressure, which is discharged through the elevator air release valve 110 or the slip air release valve 210. At this moment, the elevator signal display 111 and the slip signal display 211 do not display color, that is, they meet the unclamped state and no signal is displayed.

[0023] According to the above pneumatic interlocking principle, after the manual reversing valve 104 of the elevator controls the pneumatic elevator to clamp, the elevator signal display 111 changes color, and at the same time, the air circuit controls the air-controlled one-way valve 203 of the slip to open. At this moment, the manual reversing valve 204 of the slip can be controlled to operate the slip to open or close. Similarly, after the manual reversing valve 204 of the slip controls the pneumatic slip to clamp, the slip signal display 211 changes color, and at the same time, the air circuit controls the air-controlled one-way valve 103 of the elevator to open. At this moment, the manual reversing valve 104 of the elevator can be controlled to operate the elevator to open or close.

[0024] Pressure holding function: The elevator check valve 102 or the slip check valve 202 is used to maintain the system pressure of the elevator or the slip separately, so as to ensure that the elevator and the slip can maintain the necessary clamping and locking pressure for a short time in the case of gas failure or emergency shutdown, thereby preventing accidental sticking of the slip from causing damage to the equipment or the pipe string, and effectively improving the safety and stability of the system; The system pressure is determined by the size of the elevators and slips. According to the formula P=aD, P represents the system pressure, a represents the coefficient, and D represents the diameter of the elevators and slips. The larger the size of the elevators and slips, the larger the applicable drill pipe is, and the greater the required system pressure is. The value of a depends on environmental factors, such as humidity, temperature, downhole pressure, rock formation type, etc. Usually, a is a constant of 0.6, 0.7, 0.8, 0.9, etc. The greater the drilling difficulty, the greater the value of a. Taking a as 0.6 as an example, the relationship between system pressure and elevator and slip dimensions is shown in Table 1: Table 1: Relationship between system pressure and elevator and slip dimensions

[0025] Taking a as 0.7 as an example, the relationship between system pressure and elevator and slip dimensions is shown in Table 2: Table 2: Relationship between system pressure and elevator and slip dimensions

[0026] Taking a as 0.8 as an example, the relationship between system pressure and elevator and slip dimensions is shown in Table 3: Table 3: Relationship between system pressure and elevator and slip dimensions

[0027] Taking a as 0.9 as an example, the relationship between system pressure and elevator and slip dimensions is shown in Table 4: Table 4: Relationship between system pressure and elevator and slip dimensions

[0028] In Tables 1 to 4, the elevator and slip sizes are diameters in mm, and the system pressure represents the air pressure in bar; Here, it should be noted that a chuck cylinder can be provided separately, and the chuck cylinder is connected to the chuck. The pneumatic operation principle of the chuck cylinder is the same as that of the slip cylinder 2. The functions of the slip and the chuck are both to hold the pipe column. The chuck is used on the turntable, and the slip is used under the turntable. In summary, the interlocking control system for power elevators and power slips adopts the pneumatic principle, realizes the reliability of operation in complex drilling environments, and simplifies the pipeline connection between the control cabinet and the elevators and slips.

[0029] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. An interlocking control system for a power elevator and a power slip, comprising an elevator cylinder (1) and a slip cylinder (2), characterized in that: The air inlet end of the elevator cylinder (1) is connected to a first air inlet pipe (101); an elevator non-return valve (102), an elevator pneumatic non-return valve (103) and an elevator manual reversing valve (104) are sequentially arranged on the first air inlet pipe (101) along the air inlet direction; an elevator stop valve (105) is also arranged on the first air inlet pipe (101); the elevator stop valve (105) is connected in parallel with the elevator pneumatic non-return valve (103); the air outlet end of the elevator cylinder (1) is connected to a first air outlet pipe (106); the first air outlet pipe (106) is connected to an elevator stroke valve (107); the first air outlet pipe (106) is connected to the elevator manual reversing valve (104) via a first branch pipe (108); The air inlet end of the slip cylinder (2) is connected to a second air inlet pipe (201); a slip one-way valve (202), a slip air-controlled one-way valve (203) and a slip manual reversing valve (204) are sequentially arranged on the second air inlet pipe (201) along the air inlet direction; a slip stop valve (205) is also arranged on the second air inlet pipe (201); the slip stop valve (205) is connected in parallel with the slip air-controlled one-way valve (203); the air outlet end of the slip cylinder (2) is connected to a second air outlet pipe (206); the second air outlet pipe (206) is connected to a slip stroke valve (207); the second air outlet pipe (206) is connected to the slip manual reversing valve (204) via a second branch pipe (208); The elevator stroke valve (107) is connected to the slip air-controlled one-way valve (203) via a first connecting pipe (109), and the first connecting pipe (109) is provided with an elevator air release valve (110); The slip stroke valve (207) is connected to the elevator air-controlled one-way valve (103) via a second connecting pipe (209), and a slip air release valve (210) is provided on the second connecting pipe (209); The air intake end of the first air intake pipe (101) and the air intake end of the second air intake pipe (201) are both connected to an air intake manifold (3), and the air intake manifold (3) is connected to an air source (4).

2. An interlocking control system for power elevators and power slips according to claim 1, characterized in that: The elevator deflation valve (110) is connected to an elevator signal display (111).

3. The interlocking control system for power elevators and power slips according to claim 1, characterized in that: The slip air release valve (210) is connected to a slip signal display (211).

4. The interlocking control system for power elevators and power slips according to claim 1, characterized in that: The air intake manifold (3) is provided with a triplet (5).

5. An interlocking control system for power elevators and power slips according to claim 4, characterized in that: The triplex (5) consists of three parts: a filter, a pressure regulating valve and a lubricator.

6. The interlocking control system for power elevators and power slips according to claim 1, characterized in that: The number of the elevator cylinders (1) and the number of the slip cylinders (2) are both plural.

7. The interlocking control system for power elevators and power slips according to claim 1, characterized in that: The number of the elevator cylinders (1) and the number of the slip cylinders (2) are specifically four.

8. An interlocking control system for power elevators and power slips according to claim 1, characterized in that: A pressure gauge (6) is provided at the output end of the intake manifold (3).

9. The interlocking control system for power elevators and power slips according to claim 1, characterized in that: The formula for the system pressure and the sizes of elevators and slips is P=aD, where P represents the system pressure, a represents the coefficient, and D represents the diameter of the elevators and slips.

10. An interlocking control system for power elevators and power slips according to claim 9, characterized in that: The a is taken as 0.6.

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