Oil way system of hydraulic elevator and operation method of oil way system

Abstract

The invention discloses an oil way system of a hydraulic elevator and an operation method of the oil way system, and belongs to the technical field of petroleum drilling. The pressure detection device is communicated with a hydraulic valve set of the hydraulic elevator through a hydraulic feedback oil way, and the hydraulic valve set is communicated with an opening and closing driving oil cylinder of the hydraulic elevator. The invention further provides an operation method of the oil way system of the hydraulic elevator. According to the technical scheme, the technical problem that existing implementation work efficiency is low is solved, the real-time opening and closing state of the hydraulic elevator can be fed back, the work efficiency of tripping operation is improved, the feedback effect can be achieved only through one oil way, the number of occupied oil ways is small, and the oil way system is suitable for transformation of various new and old drilling machines, convenient to maintain and suitable for application and popularization.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling, and in particular to an oil circuit system of a hydraulic elevator and an operating method thereof. Background Art

[0002] At present, with the development of oil drilling, more and more hydraulic machinery and equipment are used in oil drilling operations, such as hydraulic elevators, power drill pipe tongs, power casing tongs, iron roughnecks, etc. Among them, hydraulic elevators are used to lift drill tools and are important equipment in drilling operations.

[0003] At present, the hydraulic elevators used on drilling rigs are driven by hydraulic valve groups and hydraulic oil circuits, and usually have only simple functions of remote opening and closing. During the drilling operation, the real-time opening and closing status of the hydraulic elevators cannot be fed back, and manual confirmation is required, which is very inconvenient and leads to low work efficiency.

[0004] Therefore, there is an urgent need for an oil circuit system of a hydraulic elevator with high working efficiency.

[0005] Invention patent CN114294274A discloses a hydraulic elevator control system, including an open signal switch and an off signal switch, wherein the oil circuits of the open signal switch and the off signal switch are also provided with a hydraulic directional valve, which controls the two ends corresponding to the open signal switch and the off signal switch to be connected to the first oil circuit end and the second oil circuit end respectively, and realizes the opening / closing of the indication signal by changing the internal oil pressure. The patent scheme realizes the monitoring of the opening or closing of the elevator by the open signal switch and the off signal switch and two different oil circuits, and the oil circuit design is complicated.

[0006] Invention patent CN211038541U discloses a new type of hydraulic elevator with opening and closing signal indication, including a left door body, a right door body, a cylinder I and a cylinder II, one end of the cylinder I is connected to the right door body through a right connecting rod and a first pull rod, and the other end is connected to the left door body through a left connecting rod and a second pull rod, and a latch is connected between the left door body and the right door body; the end of the piston rod II of the cylinder II is connected to the latch through a pull head, a third pull rod, and a fourth pull rod in sequence, and a rotatable connecting ring is installed on the door shaft arranged in the left door body, and the tail of the third pull rod and the end of the fourth pull rod are fixed on the connecting ring; the end of the piston rod I of the cylinder I is equipped with a fork head, and a fixing plate is installed in front of the end cover of the cylinder I, and a push rod reversing valve I is fixed on the fixing plate, and the push rod of the push rod reversing valve I is arranged toward the fork head, and the push rod reversing valve I is connected with the oil circuit of the oil circuit block I; and a locking mechanism is also arranged on the latch. The invention scheme sets up three signal outputs. Only when the door of the elevator is fully opened will there be a hydraulic signal. After the door is closed, there will be two hydraulic signals of latch closing and latch pin locking. The scheme has three hydraulic signal outputs to realize the state feedback of the elevator through three different oil circuits. Summary of the invention

[0007] The purpose of the present invention is to overcome the problem that during the above-mentioned drilling operation, the real-time opening and closing status of the hydraulic elevator cannot be fed back and manual confirmation is required, and to provide an oil circuit system of a hydraulic elevator and an operating method thereof, thereby solving the technical problem of low work efficiency of the existing implementation.

[0008] On the one hand, an embodiment of the present invention provides an oil circuit system of a hydraulic elevator, comprising a pressure detection device and a hydraulic feedback oil circuit. The pressure detection device is connected to a hydraulic valve group of the hydraulic elevator through the hydraulic feedback oil circuit, and the hydraulic valve group is connected to an opening and closing driving cylinder of the hydraulic elevator.

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

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

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

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

[0013] Furthermore, the feedback oil circuit, the oil inlet circuit and the oil return circuit are all connected to the hydraulic valve group through the quick-change connector.

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

[0015] Furthermore, the pressure detection device and the hydraulic valve group are installed in the hydraulic elevator body box.

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

[0017] On the other hand, an embodiment of the present invention provides a method for operating an oil circuit system of a hydraulic elevator. The following steps are involved: Step 1: When the hydraulic elevator needs to be opened, the oil inlet and oil return lines are connected through the hydraulic valve block to control the opening and closing drive cylinder of the hydraulic elevator to drive the hydraulic elevator 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 line, and the second indicator light electrically connected to the double-point pressure switch lights up. Step 2: When the hydraulic elevator needs to be closed, the oil inlet and oil return lines are connected through the hydraulic valve block to control the opening and closing drive cylinder of the hydraulic elevator to drive the hydraulic elevator 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 line, and the first indicator light electrically connected to the double-point pressure switch lights up.

[0018] The beneficial effects of the embodiments of the present invention are: The present invention provides an oil circuit system of a hydraulic elevator and an operation method thereof, wherein an opening and closing driving cylinder of the hydraulic elevator is connected through an independent hydraulic feedback oil circuit, and the oil pressure given to the hydraulic feedback oil circuit by the opening and closing driving cylinder is different according to whether the hydraulic elevator is opened or closed. The real-time oil pressure in the hydraulic valve manifold oil circuit is obtained through a pressure detection device, and then the real-time opening and closing state of the hydraulic elevator is obtained, and no interference occurs with other oil circuits of the hydraulic elevator, which can avoid affecting the action effect of the hydraulic elevator. Compared with the prior art, the oil circuit system can feedback the real-time opening and closing state of the hydraulic elevator, improve the work efficiency of the drilling operation, and the oil circuit system can achieve the feedback effect with only one oil circuit, occupying less oil circuits, and can be suitable for the transformation of various new and old drilling rigs, and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of the oil circuit system of the hydraulic elevator of the present invention.

[0021] In the figure, 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 rotating head; 6-oil inlet circuit; 7-oil return circuit; 8-quick-change connector; 9-hydraulic valve block; 10-hydraulic elevator body box; 11-back clamp. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Reference Figure 1An oil circuit system of a hydraulic elevator includes a pressure detection device 1 and a hydraulic feedback oil circuit 2. The pressure detection device 1 is connected to a hydraulic valve group 3 of the hydraulic elevator through the hydraulic feedback oil circuit 2, and the hydraulic valve group 3 is connected to an opening and closing driving cylinder (not shown) of the hydraulic elevator (not shown).

[0024] The principle is that when the hydraulic elevator is opened or closed, the opening and closing drive cylinder of the hydraulic elevator is connected through an independent hydraulic feedback oil circuit. When the hydraulic elevator is opened or closed, the opening and closing drive cylinder gives different oil pressures to the hydraulic feedback oil circuit 2. The real-time oil pressure in the hydraulic feedback oil circuit is obtained through the pressure detection device 1, and then the real-time opening and closing state of the hydraulic elevator is obtained, and it does not interfere with other oil circuits of the hydraulic elevator, which can avoid affecting the action effect of the hydraulic elevator. Compared with the prior art, the oil circuit system can feedback the real-time opening and closing state of the hydraulic elevator, improve the work efficiency of the drilling operation, and the oil circuit system can achieve the feedback effect with only one oil circuit, occupying less oil circuits, and can be suitable for the transformation of various new and old drilling rigs, which is easy to maintain. Furthermore, through the action state of the hydraulic elevator, interlocking protection can be achieved with other drilling equipment, such as winches, top drives, slips and other drilling equipment, to ensure the safe and stable operation of drilling operations.

[0025] like Figure 1 As shown, the hydraulic feedback oil circuit 2 includes a feedback oil circuit 21 and a feedback oil circuit 22. The first end of the feedback oil circuit 21 is connected to the pressure detection device 1 through the hydraulic valve group 4, and the hydraulic valve group 4 can control the conduction and closing of the feedback oil circuit 21. The second end of the feedback oil circuit 21 is connected to the first end of the feedback oil circuit 22 through the top drive rotating head 5, and the second end of the feedback oil circuit 22 is connected to the hydraulic valve group 3. The top drive rotating head 5 has a plurality of connected oil ports. On the basis of meeting the use of the top drive, the top drive rotating head 5 has a plurality of remaining oil ports. By setting the feedback oil circuit 21 and the feedback oil circuit 22 and then using the remaining oil ports on the top drive rotating head 5, a hydraulic feedback oil circuit 2 is formed, which is easy to install.

[0026] like Figure 1 As shown, the oil circuit system of the hydraulic elevator provided in this specific embodiment also includes a hydraulic elevator opening and closing drive oil circuit. The hydraulic elevator opening and closing drive oil circuit includes an oil inlet circuit 6 and an oil return circuit 7. The oil inlet end of the oil inlet circuit 6 and the oil outlet end of the oil return circuit 7 are connected to the oil circuit of the backup clamp 11, and the oil outlet end of the oil inlet circuit 6 and the oil inlet end of the oil return circuit 7 are connected to the hydraulic valve group 3. Among them, the oil inlet circuit 6 and the oil return circuit 7 are provided with a hydraulic valve block 9, 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 the hydraulic elevator opening and closing drive oil circuit, which is convenient for the layout of the oil circuit and also convenient for installation. The conduction and closing of the oil inlet circuit 6 and the oil return circuit 7 are controlled by the hydraulic valve block 9, thereby controlling the opening and closing state of the hydraulic elevator.

[0027] like Figure 1As shown, the feedback oil circuit 22, the oil inlet circuit 6 and the oil return circuit 7 are all connected to the hydraulic valve group 3 through a quick-change joint 8 with a one-way valve. The quick-change joint 8 can facilitate the connection and disconnection of the feedback oil circuit 22, the oil inlet circuit 6 and the oil return circuit 7 with the hydraulic valve group 3, thereby facilitating the use of different types of hydraulic elevators, and the hydraulic oil in the oil circuit will not leak when disconnected.

[0028] The pressure detection device 1 is a double-point pressure switch. In this specific embodiment, when the hydraulic elevator is opened, the pressure signal value of the oil pressure in the hydraulic feedback oil circuit 2 given by the opening and closing driving cylinder is 2200psi, and when the hydraulic elevator is closed, the pressure signal value of the oil pressure in the hydraulic feedback oil circuit 2 given by the opening and closing driving cylinder is 1000psi. The preset pressure signal values ​​of the double-point pressure switch are 900psi and 2000psi, and the double-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 oil circuit 2 and the hydraulic valve group 4, the preset pressure signal value of the double-point pressure switch is smaller than the actual oil pressure given to the hydraulic feedback oil circuit by the opening and closing driving cylinder when the hydraulic elevator is opened and closed, so as to improve the accuracy of feedback. Specifically, when the hydraulic oil of the opening and closing driving cylinder reaches the oil pressure of the double-point pressure switch through the hydraulic feedback oil circuit 2 and reaches 900psi, the first indicator light electrically connected to the double-point pressure switch lights up, and the hydraulic elevator is in the closed state. When the hydraulic oil of the opening and closing driving cylinder reaches the oil pressure of the double-point pressure switch through the hydraulic feedback oil circuit 2 and reaches 2000psi, the first indicator light connected to the double-point pressure switch does not light up, and the second indicator light lights up, and the hydraulic elevator is in the open state. In this way, accurate feedback of the opening and closing state of the hydraulic elevator is achieved.

[0029] The pressure detection device 1 is an explosion-proof pressure detection device 1, and the hydraulic valve group 4 is an explosion-proof hydraulic valve group. Specifically, the double-point pressure switch is an explosion-proof double-point pressure switch. The explosion-proof requirements during the operation of the hydraulic elevator are met. The double-point pressure switch and the hydraulic valve group 4 are both installed in the hydraulic elevator body box 10.

[0030] The 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, and on the other hand, it can enable the hydraulic feedback oil circuit 2 to achieve a feedback effect.

[0031] The working principle of the oil circuit system of a hydraulic elevator provided by a specific embodiment of the present invention is that when the hydraulic elevator needs to be opened, the oil inlet circuit 6 and the oil return circuit 7 are connected through the hydraulic valve block 9, and the opening and closing driving cylinder of the hydraulic elevator is controlled to drive the hydraulic elevator to open. At the same time, the hydraulic oil of the opening and closing driving cylinder reaches the double-point pressure switch through the hydraulic feedback oil circuit 2, and the second indicator light electrically connected to the double-point pressure switch is lit. When the hydraulic elevator needs to be closed, the oil inlet circuit 6 and the oil return circuit 7 are connected through the hydraulic valve block 9, and the opening and closing driving cylinder of the hydraulic elevator is controlled to drive the hydraulic elevator to close. At the same time, the hydraulic oil of the opening and closing driving cylinder reaches the double-point pressure switch through the hydraulic feedback oil circuit 2, and the first indicator light electrically connected to the double-point pressure switch is lit.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. An oil circuit system for a hydraulic elevator, characterized in that: It comprises a pressure detection device and a hydraulic feedback oil circuit, the pressure detection device is connected to a hydraulic valve group (3) of a hydraulic elevator through the hydraulic feedback oil circuit, and the hydraulic valve group (3) is connected to an opening and closing driving cylinder of the hydraulic elevator.

2. The oil circuit system of the hydraulic elevator according to claim 1, characterized in that: The hydraulic feedback oil circuit (2) comprises a feedback oil circuit (21) and another feedback oil circuit (22).

3. The oil circuit system of the hydraulic elevator according to claim 2, characterized in that: One end of the feedback oil circuit (21) is connected to the pressure detection device via the hydraulic valve group (4), the other end of the feedback oil circuit (21) is connected to one end of the feedback oil circuit (22) via the top drive rotary head (5), and one end of the feedback oil circuit (22) is connected to the hydraulic valve group (3).

4. The oil circuit system of the hydraulic elevator according to claim 3, characterized in that: The oil circuit system also includes an oil circuit for driving the opening and closing of a hydraulic elevator; the oil circuit for driving the opening and closing of a hydraulic elevator includes an oil inlet circuit (6) and an oil return circuit (7); the oil inlet end of the oil inlet circuit (6) and the oil outlet end of the oil return circuit (7) are connected to the oil circuit of the backup clamp (11); the oil outlet end of the oil inlet circuit (6) and the oil inlet end of the oil return circuit (7) are connected to the hydraulic valve group (3).

5. The oil circuit system of the hydraulic elevator according to claim 4, characterized in that: The top drive rotating head (5) is connected to the top drive hydraulic station.

6. The oil circuit system of the hydraulic elevator according to claim 5, characterized in that: The feedback oil circuit (22), the oil inlet circuit (6) and the oil return circuit (7) are all connected to the hydraulic valve group (3) via a quick-change joint (8).

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

8. The oil circuit system of the hydraulic elevator according to claim 7, characterized in that: The pressure detection device (1) and the hydraulic valve group (4) are installed in the hydraulic elevator body box (10).

9. The oil circuit system of the hydraulic elevator according to claim 8, characterized in that: The pressure detection device (1) is an explosion-proof pressure detection device, and the hydraulic valve group (4) is an explosion-proof hydraulic valve group; the pressure detection device (1) is a double-point pressure switch.

10. A method for operating an oil circuit system of a hydraulic elevator, characterized in that: The following steps are involved: Step 1: When the hydraulic elevator needs to be opened, the oil inlet circuit (6) and the oil return circuit (7) are connected through the hydraulic valve block (9), and the opening and closing drive cylinder of the hydraulic elevator is controlled to drive the hydraulic elevator 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 (2), and the second indicator light electrically connected to the double-point pressure switch is lit; Step 2: When the hydraulic elevator needs to be closed, the oil inlet circuit (6) and the oil return circuit (7) are connected through the hydraulic valve block (9), and the opening and closing drive cylinder of the hydraulic elevator is controlled to drive the hydraulic elevator 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 electrically connected to the double-point pressure switch lights up.

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