Hydraulic oil circuit system of a hydraulic elevator hook and method of operating the same

Abstract

The application discloses a hydraulic oil circuit system of a hydraulic elevator clamp and an operation method thereof, and belongs to the technical field of oil drilling. The system comprises a pressure detection device and a hydraulic feedback oil circuit. The pressure detection device is connected with a hydraulic valve group of the hydraulic elevator clamp through the hydraulic feedback oil circuit, and the hydraulic valve group is connected with an opening and closing driving oil cylinder of the hydraulic elevator clamp. The application further provides an operation method of the hydraulic oil circuit system of the hydraulic elevator clamp. The technical scheme of the application solves the technical problem of low work efficiency in the prior art, can feed back the real-time opening and closing state of the hydraulic elevator clamp, improves the work efficiency of the tripping operation, and realizes the feedback effect by using only one oil circuit, so that the oil circuit system occupies less oil circuit, is suitable for the modification of various new and old drilling machines, is convenient to maintain, and is suitable for promotion and application.

Description

Technical Field

[0001] This invention relates to the field of oil drilling technology, and in particular to a hydraulic lifting clamp oil circuit system and its operation method. Background Technology

[0002] Currently, with the development of oil drilling, more and more hydraulic machinery and equipment are being used in oil drilling operations, such as hydraulic jacks, power drill pipe tongs, power casing tongs, and steel drills. Among them, hydraulic jacks are used to lift drill strings and are an important piece of equipment in tripping in and out of the drill string.

[0003] Currently, the hydraulic jacks used on drilling rigs are driven by hydraulic valve groups and hydraulic circuits. They typically only have simple functions such as remote opening and closing. During tripping operations, the real-time opening and closing status of the hydraulic jacks cannot be fed back, requiring manual confirmation, which is very inconvenient and results in low work efficiency.

[0004] Therefore, there is an urgent need for a hydraulic lifting system with high working efficiency.

[0005] Invention patent CN114294274A discloses a hydraulic lifting clamp control system, including an open signal switch and a close signal switch. A hydraulic directional valve is also installed on the oil circuit of the open and close signal switches, controlling the two ends corresponding to the open and close signal switches to connect to a first oil circuit end and a second oil circuit end, respectively. The opening / closing of the indicator signal is achieved by changing the internal oil pressure. The patented solution monitors the opening or closing of the lifting clamp through the open and close signal switches and two different oil circuits, resulting in a complex oil circuit design.

[0006] Invention patent CN211038541U discloses a novel hydraulic lifting clamp with opening and closing signal indication, including a left door body, a right door body, hydraulic cylinder I and hydraulic cylinder II. One end of hydraulic cylinder I is connected to the right door body via a right connecting rod and a first pull rod, and the other end is connected to the left door body via a left connecting rod and a second pull rod. A latch connects the left and right door bodies. The end of the piston rod II of hydraulic cylinder II is sequentially connected to the latch via a pull head, a third pull rod, and a fourth pull rod. A rotatable connecting ring is installed on the door hinge inside the left door body. The tail of the third pull rod and the end of the fourth pull rod are both fixed to the connecting ring. A fork head is installed at the end of the piston rod I of hydraulic cylinder I. A fixing plate is installed in front of the end cover of hydraulic cylinder I. A push rod reversing valve I is fixed on the fixing plate. The push rod of the push rod reversing valve I is set towards the fork head. The push rod reversing valve I is also connected to the oil circuit of the oil circuit block I. A locking mechanism is also provided on the latch. The invention provides three signal outputs. A hydraulic signal is only generated when the door of the hanger is fully open. After the door is closed, two hydraulic signals are generated: the latch is closed and the latch pin is locked. The three hydraulic signal outputs are achieved through three different oil circuits to provide status feedback for the hanger. Summary of the Invention

[0007] The purpose of this invention is to overcome the problem that the real-time opening and closing status of the hydraulic hoist cannot be fed back during the drilling and tripping operations, and manual confirmation is required. This invention provides a hydraulic hoist oil circuit system and its operation method, thereby solving the technical problem of low efficiency in existing implementations.

[0008] On one hand, embodiments of the present invention provide an oil circuit system for a hydraulic lifting clamp, including a pressure detection device and a hydraulic feedback oil circuit. The pressure detection device is connected to the hydraulic valve group of the hydraulic lifting clamp via the hydraulic feedback oil circuit, and the hydraulic valve group is connected to the opening and closing drive cylinder of the hydraulic lifting clamp.

[0009] Furthermore, the hydraulic feedback circuit includes a feedback circuit and another feedback circuit.

[0010] Furthermore, one end of the feedback oil circuit is connected to the pressure detection device through a hydraulic valve group, and the other end of the feedback oil circuit is connected to one end of the feedback oil circuit through a top drive rotating head, and one end of the feedback oil circuit is connected to the hydraulic valve group.

[0011] Furthermore, the hydraulic circuit system also includes a hydraulic clamp opening and closing drive hydraulic circuit; the hydraulic clamp opening and closing drive hydraulic circuit includes an inlet oil circuit and a return oil circuit, the inlet end of the inlet oil circuit and the outlet end of the return oil circuit are connected to the back clamp oil circuit, and the outlet end of the inlet oil circuit and the inlet end of the return oil circuit are connected to the hydraulic valve group.

[0012] Furthermore, the top drive rotary head is connected to the top drive hydraulic station.

[0013] Furthermore, the feedback oil circuit, inlet oil circuit, and return oil circuit are all connected to the hydraulic valve assembly via quick-connect couplings.

[0014] Furthermore, hydraulic valve blocks are installed in the oil inlet and return lines; the hydraulic valve group is connected to the top drive hydraulic station.

[0015] Furthermore, the pressure detection device and hydraulic valve assembly are installed inside the hydraulic lifting clamp body box.

[0016] Furthermore, the pressure detection device is an explosion-proof pressure detection device, and the hydraulic valve assembly is an explosion-proof hydraulic valve assembly; the pressure detection device is a two-point pressure switch.

[0017] On the other hand, embodiments of the present invention provide an operation method for the hydraulic circuit system of a hydraulic lifting clamp.

[0018] Includes the following steps:

[0019] Step 1: When the hydraulic clamp needs to be opened, the hydraulic valve block connects the inlet and outlet oil circuits, controlling the opening and closing drive cylinder of the hydraulic clamp to drive the hydraulic clamp to open. At the same time, the hydraulic oil of the opening and closing drive cylinder reaches the double-point pressure switch through the hydraulic feedback oil circuit, and the second indicator light connected to the double-point pressure switch lights up.

[0020] Step 2: When the hydraulic clamp needs to be closed, the hydraulic valve block connects the inlet and outlet oil circuits, controlling the opening and closing drive cylinder of the hydraulic clamp to drive the hydraulic clamp to close. At the same time, the hydraulic oil from the opening and closing drive cylinder reaches the dual-point pressure switch through the hydraulic feedback oil circuit, and the first indicator light of the dual-point pressure switch illuminates.

[0021] The beneficial effects of the embodiments of the present invention are:

[0022] This invention provides a hydraulic circuit system for a hydraulic lifting clamp and its operating method. A separate hydraulic feedback circuit connects the opening and closing drive cylinder of the hydraulic lifting clamp. Based on the different oil pressures supplied to the hydraulic feedback circuit by the opening and closing drive cylinder when the hydraulic lifting clamp is opened or closed, a pressure detection device obtains the real-time oil pressure in the hydraulic valve manifold, thus determining the real-time opening and closing state of the hydraulic lifting clamp. This system does not interfere with other hydraulic circuits of the hydraulic lifting clamp, avoiding any impact on its operational performance. Compared to existing technologies, this hydraulic circuit system can provide real-time feedback on the opening and closing state of the hydraulic lifting clamp, improving the efficiency of drilling operations. Furthermore, this system uses only a single hydraulic circuit to achieve the feedback effect, requiring less hydraulic circuit space, making it suitable for retrofitting various new and old drilling rigs and facilitating maintenance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the hydraulic circuit system of the hydraulic lifting clamp of the present invention.

[0025] In the diagram, 1-pressure detection device; 2-hydraulic feedback oil circuit; 21-feedback oil circuit; 22-feedback oil circuit; 3-hydraulic valve group; 4-hydraulic valve group; 5-top drive rotary head; 6-oil inlet circuit; 7-oil return circuit; 8-quick-change connector; 9-hydraulic valve block; 10-hydraulic lifting clamp body box; 11-back clamp. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Reference Figure 1 A hydraulic lifting clamp's hydraulic circuit system includes a pressure detection device 1 and a hydraulic feedback circuit 2. The pressure detection device 1 is connected to a hydraulic valve group 3 of the hydraulic lifting clamp via the hydraulic feedback circuit 2, and the hydraulic valve group 3 is connected to an opening and closing drive cylinder (not shown) of the hydraulic lifting clamp (not shown).

[0028] The principle is as follows: when the hydraulic jack opens or closes, an independent hydraulic feedback oil circuit connects to the opening and closing drive cylinder of the hydraulic jack. Based on the different oil pressures supplied to the hydraulic feedback oil circuit 2 by the opening and closing drive cylinder when the hydraulic jack opens or closes, the real-time oil pressure in the hydraulic feedback oil circuit is obtained through the pressure detection device 1, thus determining the real-time opening and closing state of the hydraulic jack. This system does not interfere with other oil circuits of the hydraulic jack, avoiding any impact on the jack's operational performance. Compared to existing technologies, this oil circuit system can provide real-time feedback on the opening and closing state of the hydraulic jack, improving the efficiency of tripping in and out of the drill string. Furthermore, this system only requires a single oil circuit to achieve the feedback effect, occupying fewer oil circuits and is suitable for retrofitting various new and old drilling rigs, facilitating maintenance. Moreover, the operational status of the hydraulic jack can also be used to interlock and protect other drilling equipment, such as winches, top drives, and slips, ensuring the safe and stable operation of drilling operations.

[0029] like Figure 1 As shown, the hydraulic feedback circuit 2 includes feedback circuit 21 and feedback circuit 22. The first end of feedback circuit 21 is connected to the pressure detection device 1 via hydraulic valve group 4. Hydraulic valve group 4 can control the opening and closing of feedback circuit 21. The second end of feedback circuit 21 is connected to the first end of feedback circuit 22 via top drive rotary head 5. The second end of feedback circuit 22 is connected to hydraulic valve group 3. The top drive rotary head 5 has multiple connected oil ports. In addition to meeting the needs of the top drive, the top drive rotary head 5 also has several remaining oil ports. By setting up feedback circuit 21 and feedback circuit 22 and utilizing the remaining oil ports on the top drive rotary head 5, a hydraulic feedback circuit 2 is formed, facilitating installation.

[0030] like Figure 1As shown, the hydraulic lifting clamp system provided in this specific embodiment also includes a hydraulic lifting clamp opening and closing drive hydraulic circuit. The hydraulic lifting clamp opening and closing drive hydraulic circuit includes an inlet oil circuit 6 and a return oil circuit 7. The inlet end of the inlet oil circuit 6 and the outlet end of the return oil circuit 7 are connected to the back clamp 11 hydraulic circuit, and the outlet end of the inlet oil circuit 6 and the inlet end of the return oil circuit 7 are connected to the hydraulic valve group 3. Hydraulic valve blocks 9 are provided in the inlet oil circuit 6 and the return oil circuit 7, and the top drive rotating head 5 is connected to the top drive hydraulic station (not shown). The multiple remaining oil ports of the top drive rotating head 5 are used to connect to the hydraulic lifting clamp opening and closing drive hydraulic circuit, facilitating the layout of the hydraulic circuit and installation. The opening and closing state of the hydraulic lifting clamp is controlled by the hydraulic valve block 9, which controls the opening and closing of the inlet oil circuit 6 and the return oil circuit 7.

[0031] like Figure 1 As shown, the feedback oil circuit 22, the inlet oil circuit 6, and the return oil circuit 7 are all connected to the hydraulic valve group 3 via quick-connect couplings 8 with check valves. The quick-connect couplings 8 facilitate the connection and disconnection of the feedback oil circuit 22, the inlet oil circuit 6, and the return oil circuit 7 with the hydraulic valve group 3, thereby facilitating the use of different models of hydraulic lifting clamps, and preventing hydraulic oil leakage when disconnected.

[0032] The pressure detection device 1 is a two-point pressure switch. In this specific embodiment, when the hydraulic clamp is opened, the pressure signal value of the hydraulic feedback circuit 2 supplied by its opening and closing drive cylinder is 2200 psi; when the hydraulic clamp is closed, the pressure signal value of the hydraulic feedback circuit 2 supplied by its opening and closing drive cylinder is 1000 psi. The preset pressure signal values ​​of the two-point pressure switch are 900 psi and 2000 psi. The two-point pressure switch is electrically connected to a first indicator light (not shown) and a second indicator light (not shown). Considering the oil pressure loss of the hydraulic valve group 3, the hydraulic feedback circuit 2, and the hydraulic valve group 4, setting the preset pressure signal value of the two-point pressure switch to be less than the actual oil pressure supplied to the hydraulic feedback circuit by its opening and closing drive cylinder when the hydraulic clamp is opened and closed can improve the accuracy of the feedback. Specifically, when the hydraulic oil from the opening / closing drive cylinder reaches a pressure of 900 psi at the dual-point pressure switch via hydraulic feedback circuit 2, the first indicator light connected to the dual-point pressure switch illuminates, indicating that the hydraulic clamp is in the closed state. When the hydraulic oil from the opening / closing drive cylinder reaches a pressure of 2000 psi at the dual-point pressure switch via hydraulic feedback circuit 2, the first indicator light connected to the dual-point pressure switch does not illuminate, while the second indicator light illuminates, indicating that the hydraulic clamp is in the open state. This achieves accurate feedback of the opening and closing status of the hydraulic clamp.

[0033] The pressure detection device 1 is an explosion-proof pressure detection device, and the hydraulic valve assembly 4 is an explosion-proof hydraulic valve assembly. Specifically, the dual-point pressure switch is an explosion-proof dual-point pressure switch, meeting the explosion-proof requirements during hydraulic lifting operation. Both the dual-point pressure switch and the hydraulic valve assembly 4 are installed inside the hydraulic lifting machine body box 10.

[0034] Hydraulic valve group 4 is connected to the top drive hydraulic station. On the one hand, it can return the hydraulic oil in the hydraulic feedback oil circuit 2 to the top drive hydraulic station for continued use. On the other hand, it enables the hydraulic feedback oil circuit 2 to achieve the feedback effect.

[0035] The working principle of the hydraulic lifting clamp's oil circuit system provided in this invention is as follows: When the hydraulic lifting clamp needs to be opened, the hydraulic valve block 9 connects the inlet oil circuit 6 and the return oil circuit 7, controlling the opening and closing drive cylinder of the hydraulic lifting clamp to drive the hydraulic lifting clamp to open. At the same time, the hydraulic oil from the opening and closing drive cylinder reaches the dual-point pressure switch through the hydraulic feedback oil circuit 2, and the second indicator light electrically connected to the dual-point pressure switch illuminates. When the hydraulic lifting clamp needs to be closed, the hydraulic valve block 9 connects the inlet oil circuit 6 and the return oil circuit 7, controlling the opening and closing drive cylinder of the hydraulic lifting clamp to drive the hydraulic lifting clamp to close. At the same time, the hydraulic oil from the opening and closing drive cylinder reaches the dual-point pressure switch through the hydraulic feedback oil circuit 2, and the first indicator light electrically connected to the dual-point pressure switch illuminates.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A hydraulic lifting clamp's oil circuit system, characterized in that, It includes a pressure detection device and a hydraulic feedback oil circuit. The pressure detection device is connected to the first hydraulic valve group (3) of the hydraulic hoist through the hydraulic feedback oil circuit. The first hydraulic valve group (3) is connected to the opening and closing drive cylinder of the hydraulic hoist. The pressure detection device (1) is a two-point pressure switch, and the two-point pressure switch is electrically connected to a first indicator light and a second indicator light; The oil circuit system also includes a hydraulic clamp opening and closing drive oil circuit; the hydraulic clamp opening and closing drive oil circuit includes an inlet oil circuit (6) and a return oil circuit (7), the inlet end of the inlet oil circuit (6) and the outlet end of the return oil circuit (7) are connected to the back clamp (11) oil circuit, and the outlet end of the inlet oil circuit (6) and the inlet end of the return oil circuit (7) are connected to the first hydraulic valve group (3). When the hydraulic clamp needs to be opened, the inlet oil circuit (6) and the return oil circuit (7) are connected, and the hydraulic clamp opening and closing drive cylinder is controlled to drive the hydraulic clamp to open. At the same time, the hydraulic oil of the opening and closing drive cylinder reaches the double-point pressure switch through the hydraulic feedback oil circuit, and the second indicator light connected to the double-point pressure switch is lit. When the hydraulic hoist needs to be closed, the inlet oil circuit (6) and the return oil circuit (7) are connected, and the hydraulic hoist opening and closing drive cylinder is controlled to drive the hydraulic hoist to close. At the same time, the hydraulic oil of the opening and closing drive cylinder reaches the double-point pressure switch through the hydraulic feedback oil circuit, and the first indicator light connected to the double-point pressure switch is lit. The hydraulic feedback circuit (2) includes a first feedback circuit (21) and a second feedback circuit (22); One end of the first feedback oil circuit (21) is connected to the pressure detection device through the second hydraulic valve group (4), and the other end of the first feedback oil circuit (21) is connected to one end of the second feedback oil circuit (22) through the top drive rotating head (5). One end of the second feedback oil circuit (22) is connected to the first hydraulic valve group (3).

2. The hydraulic circuit system of the hydraulic lifting clamp according to claim 1, characterized in that, The top drive rotating head (5) is connected to the top drive hydraulic station.

3. The hydraulic circuit system of the hydraulic lifting clamp according to claim 2, characterized in that, The second feedback oil circuit (22), the inlet oil circuit (6) and the return oil circuit (7) are all connected to the first hydraulic valve group (3) through quick-change connectors (8).

4. The hydraulic circuit system of the hydraulic lifting clamp according to claim 3, characterized in that, The oil inlet (6) and oil return (7) are equipped with hydraulic valve blocks; the second hydraulic valve group (4) is connected to the top drive hydraulic station.

5. The hydraulic circuit system of the hydraulic lifting clamp according to claim 4, characterized in that, The pressure detection device (1) and the second hydraulic valve group (4) are installed inside the hydraulic lifting clamp body box (10).

6. The hydraulic circuit system of the hydraulic lifting clamp according to claim 5, characterized in that, The pressure detection device (1) is an explosion-proof pressure detection device, and the second hydraulic valve group (4) is an explosion-proof hydraulic valve group.

7. A method for operating a hydraulic lifting clamp's oil circuit system, based on the oil circuit system according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1: When the hydraulic hoist needs to be opened, the hydraulic valve block (9) connects the oil inlet (6) and the oil return (7) to control the opening and closing drive cylinder of the hydraulic hoist to open the hydraulic hoist. At the same time, the hydraulic oil of the opening and closing drive cylinder reaches the double-point pressure switch through the hydraulic feedback oil circuit (2), and the second indicator light connected to the double-point pressure switch lights up. Step 2: When the hydraulic hoist needs to be closed, the hydraulic valve block (9) connects the inlet oil circuit (6) and the return oil circuit (7) to control the opening and closing drive cylinder of the hydraulic hoist to drive the hydraulic hoist to close. At the same time, the hydraulic oil of the opening and closing drive cylinder reaches the double-point pressure switch through the hydraulic feedback oil circuit (2), and the first indicator light of the double-point pressure switch is lit.

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