A drilling rig leg control system

Abstract

The application discloses a drilling tower leg control system, and relates to the field of engineering machinery, which is used for optimizing the performance of an existing drilling tower leg control system. The system comprises a control element, including a leg handle, a one-way valve, an electromagnetic reversing valve and a leg oil cylinder, which are used for controlling the extension and retraction of left and right legs of the drilling tower; and a detection component, including a pressure sensor and a controller, which are used for detecting the extension and retraction position pressure of the left and right legs of the drilling tower. The technical scheme has the detection component and the control component, can judge the ground contact condition of the left and right legs according to the detected leg extension pressure, prevent the drilling tower from tilting and causing a dangerous accident due to unfirm ground contact during work, and ensure the reliability of the drilling machine work.

Description

TECHNICAL FIELD

[0001] The present application relates to a deep well rig control system, in particular to a drilling tower leg control system. BACKGROUND

[0002] The deep well rig is a special equipment for shallow resource exploitation, mainly used for drilling and exploitation of coal bed gas, shale gas, shallow oil, geothermal, underground water and other resources, with the advantages of large opening diameter and high drilling efficiency, and also applied to mine rescue, gas extraction and other special occasions.

[0003] The deep well rig mainly consists of a running chassis, a working device (including a drilling tower, a top drive power head, a tool winch, an unhooking device, a mud manifold), and a power, hydraulic, and electrical system, etc. components. The drilling rig drills a hole that is relatively deep (usually several hundred meters to several kilometers). In order to ensure the perpendicularity of the drilling hole, before work, the ground under the chassis of the drilling rig is first leveled and compacted, and then the front and rear and left and right legs on the four sides of the chassis are raised. If the ground cannot be leveled, the drilling rig can be leveled by the front, rear, and left and right legs, and then the working device of the drilling rig, i.e. the drilling tower, is erected vertically to the ground by a handle. The left and right legs of the drilling tower each have a leg, and the extension and retraction of the left and right legs are controlled by the extension and retraction of the left and right oil cylinders. Only when the left and right legs stably contact the ground can the drilling tower be perpendicular to the ground, thereby ensuring the stability of the drilling tower during drilling. The above technical solution can determine the contact of the left and right legs with the ground according to the detected extension pressure of the left and right legs, prevent the drilling tower from tilting during work, and prevent dangerous accidents, thereby ensuring the stability of the drilling tower and the reliability of the drilling rig. SUMMARY

[0004] The present application provides a control system with detection components and control components, which can determine the contact of the left and right legs with the ground according to the detected extension pressure of the left and right legs, prevent the drilling tower from tilting during work, and prevent dangerous accidents, thereby ensuring the stability of the drilling tower and the reliability of the drilling rig.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present application is as follows: a drilling tower leg control system, comprising a hydraulic control part, an electrical detection part and a hydraulic oil tank;

[0006] The hydraulic control part comprises a left leg control handle, a left leg check valve, a left leg solenoid valve, a left leg oil cylinder, a right leg control handle, a right leg check valve, a right leg solenoid valve, and a right leg oil cylinder;

[0007] The left leg control handle is connected to the rod cavity of the left leg oil cylinder through the left leg check valve; the left leg control handle is connected to the left leg solenoid valve through the left leg check valve, and the left leg solenoid valve is connected to the rodless cavity of the left leg oil cylinder; a left leg control hydraulic circuit is formed;

[0008] The right leg control handle is connected with the rod cavity of the right leg oil cylinder through the right leg one-way valve, the right leg control handle is connected with the right leg electromagnetic valve through the right leg one-way valve, and the right leg electromagnetic valve is connected with the rodless cavity of the right leg oil cylinder; and a right leg control hydraulic circuit is formed.

[0009] The hydraulic oil tank provides hydraulic oil for the left leg control handle and the right leg control handle through the oil filter respectively.

[0010] As a preferred scheme of the drilling tower leg control system, the electrical detection part comprises a left leg pressure sensor, a right leg pressure sensor and a controller.

[0011] The left leg pressure sensor is used for monitoring the pressure of the oil port of the rodless cavity of the left leg oil cylinder and transmitting the pressure signal to the controller, and the controller is electrically connected with the left leg electromagnetic valve.

[0012] The right leg pressure sensor is used for monitoring the pressure of the oil port of the rodless cavity of the right leg oil cylinder and transmitting the pressure signal to the controller, and the controller is electrically connected with the right leg electromagnetic valve.

[0013] As a preferred scheme of the drilling tower leg control system, the controller can input a pressure setting value.

[0014] When the pressure of the oil port of the rodless cavity of the left leg oil cylinder reaches the setting value, the controller receives the pressure signal of the left leg pressure sensor and outputs an electric signal to the left leg electromagnetic valve, so as to cut off the oil circuit of the rodless cavity of the left leg oil cylinder.

[0015] When the pressure of the oil port of the rodless cavity of the right leg oil cylinder reaches the setting value, the controller receives the pressure signal of the right leg pressure sensor and outputs an electric signal to the right leg electromagnetic valve, so as to cut off the oil circuit of the rodless cavity of the right leg oil cylinder.

[0016] As a preferred scheme of the drilling tower leg control system, the left leg one-way valve and the right leg one-way valve are both bidirectional control one-way valves.

[0017] The above technical scheme can judge the left and right leg ground contact conditions according to the detected leg extension pressure, prevent the drilling tower from tilting during work, prevent dangerous accidents, and ensure the stability of the drilling tower work and the reliability of the drilling machine work. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification are used to provide further understanding of the application, and the illustrative embodiments of the application and their descriptions are used to explain the application, and do not constitute improper limitations on the application;

[0019] Fig. 1 is a hydraulic control principle schematic diagram of the application.

[0020] Fig. 2 is the schematic diagram of the electrical control principle of the present application;

[0021] In the figure: 1-hydraulic oil tank, 2-left leg control handle, 3-left leg check valve, 4-left leg solenoid valve, 5-left leg pressure sensor, 6-left leg oil cylinder, 7-right leg solenoid valve, 8-right leg pressure sensor, 9-right leg oil cylinder, 10-right leg check valve, 11-right leg control handle, 12-oil filter, 13-controller. DETAILED DESCRIPTION

[0022] For the purpose, technical scheme and advantages of the implementation of the present application, the technical scheme of the embodiments of the present application will be described in more detail below in combination with the drawings of the embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.

[0023] As shown in Figs. 1-2 , a drilling tower leg control system comprises a hydraulic control part and an electrical control part.

[0024] The hydraulic control part comprises a left leg control handle 2, a left leg check valve 3, a left leg solenoid valve 4, a left leg oil cylinder 6, a right leg control handle 11, a right leg check valve 10, a right leg solenoid valve 7 and a right leg oil cylinder 9.

[0025] The A3 port of the left leg control handle 2 is connected with the rod cavity of the left leg oil cylinder 6 through the left leg check valve 3, the B3 port of the left leg control handle 2 is connected with the A1 port of the left leg solenoid valve 4 through the left leg check valve 3, and the A2 port of the left leg solenoid valve 4 is connected with the rodless cavity of the left leg oil cylinder 6; the A4 port of the right leg control handle 11 is connected with the rod cavity of the right leg oil cylinder 9 through the right leg check valve 10, the B4 port of the right leg control handle 11 is connected with the A1 port of the right leg solenoid valve 7 through the right leg check valve 10, and the A2 port of the right leg solenoid valve 7 is connected with the rodless cavity of the right leg oil cylinder 9.

[0026] The electrical detection part comprises: left leg pressure sensor 5, right leg pressure sensor 8, controller 13; the positive pole of direct current 24V power supply is connected to the 3, 4, 5, 119, 120, 121 ends of the controller 13 and the 1 end of the left leg pressure sensor 5 and the right leg pressure sensor 8 through a wire, the 4 ends of the left leg pressure sensor 5 and the right leg pressure sensor 8 are respectively connected to the 128 and 271 ends of the controller 13, the 1, 2, 116, 117, 118 ends of the controller 13 are connected to the negative pole of the 24V power supply, the 142 and 143 ends are respectively connected to the positive poles of the left leg electromagnetic valve 4 and the right leg electromagnetic valve 7, the negative poles of the left leg electromagnetic valve 4 and the right leg electromagnetic valve 7 are connected to the negative pole of the 24V power supply, the left leg pressure sensor 5 is installed at the M1 port of the left leg electromagnetic valve 4, the right leg pressure sensor 8 is installed at the M1 port of the right leg electromagnetic valve 7, and the pressures of the left leg oil cylinder 6 and the right leg oil cylinder 9 are respectively detected, that is, the pressures of the left and right legs are detected, so as to judge whether the left and right legs are completely grounded, once the left and right leg pressures reach the set value, the controller 13 outputs an electrical signal to the left leg electromagnetic valve 4 and the right leg electromagnetic valve 7, thereby cutting off the oil circuit of the left leg oil cylinder 6 and the right leg oil cylinder 9.

[0027] Working process: Since the large deep well drilling rig tower is high (usually more than ten meters), heavy, and the drilling hole is deep (usually more than 1000 meters), in order to ensure the stability of the drilling rig during work and the perpendicularity of the drilling hole, before work, first, the ground under the drilling rig chassis is flattened and compacted, then the front and rear and left and right legs of the drilling rig chassis are raised, if the ground cannot be flattened, the drilling rig is leveled by the front and rear and left and right legs of the drilling rig, and reliably grounded, then the working device of the drilling rig is raised by the handle, and the drilling tower is perpendicular to the ground, the left and right legs of the drilling tower are controlled by the extension and retraction of the left and right oil cylinders, and only when the left and right legs are stably grounded, the drilling quality can be ensured, and the drilling tower is prevented from tilting during work, and dangerous accidents are prevented.

[0028] When the left outrigger control handle 2 is operated upward, high pressure oil flows in from the P port of the left outrigger control handle 2, flows out from the A3 port, flows into the rod cavity of the left outrigger cylinder 6 through the left outrigger check valve 3, the hydraulic oil in the rodless cavity of the left outrigger cylinder 6 flows in through the A2 port of the left outrigger solenoid valve 4, flows out from the A1 port, flows in through the left outrigger check valve 3, flows in through the B3 port of the left outrigger control handle 2, flows out from the T port, and then flows into the hydraulic oil tank 1 through the oil filter 12. At this time, the left outrigger cylinder 6 retracts upward, the left outrigger retracts upward, and moves away from the ground. When the left outrigger control handle 2 is operated downward, high pressure oil flows in from the P port of the left outrigger control handle 2, flows out from the B3 port, flows into the A1 port of the left outrigger solenoid valve 4 through the left outrigger check valve 3, and then flows into the rodless cavity of the left outrigger cylinder 6 through the A2 port. The hydraulic oil in the rod cavity of the left outrigger cylinder 6 flows into the A3 port of the left outrigger control handle 2 through the check valve 3, flows out from the T port, and then flows into the hydraulic oil tank 1 through the oil filter 12. At this time, the left outrigger cylinder 6 extends downward, the left outrigger extends downward, and approaches the ground. When the left outrigger completely contacts the ground, the pressure in the rodless cavity of the left outrigger cylinder 6 gradually increases, and the value detected by the 4 end of the left outrigger pressure sensor 5 input to the 128 end of the controller 13 also gradually increases. When the value increases to the set value of the drilling machine, the controller 13 outputs an electric signal from the 142 end, the left outrigger solenoid valve 4 changes direction, at this time, the hydraulic oil in the rodless cavity of the left outrigger cylinder 6 cannot flow out, the pressure is kept constant, and the left outrigger maintains stable contact with the ground.

[0029] When the right outrigger control handle 11 is operated upwards, high-pressure oil flows in through port P and out through port A4, then flows into the rod chamber of the right outrigger cylinder 9 via the right outrigger check valve 10. Hydraulic oil in the rodless chamber of the right outrigger cylinder 9 flows in through port A2 and out through port A1 of the right outrigger solenoid valve 7, then flows in through the right outrigger check valve 10, then in through port B4 and out through port T of the right outrigger control handle 11, and finally flows into the hydraulic oil tank 1 via the oil filter 12. At this time, the right outrigger cylinder 9 retracts upwards, and the right outrigger retracts upwards, moving away from the ground. When the right outrigger control handle 11 is operated downwards, high-pressure oil flows in through port P and out through port B4, then flows into port A1 of the right outrigger solenoid valve 7 via the right outrigger check valve 10, and then flows into the right outrigger cylinder 1 via port A2. Hydraulic oil from the rodless chamber of the right outrigger cylinder 9 and the rod chamber of the right outrigger cylinder 9 flows through the right outrigger check valve 10 into port A4 of the right outrigger control handle 11, then flows out through port T, and finally flows into the hydraulic oil tank 1 through the oil filter 12. At this time, the right outrigger cylinder 9 extends downwards, and the right outrigger extends downwards to contact the ground. When the right outrigger is fully in contact with the ground, the pressure in the rodless chamber of the right outrigger cylinder 9 gradually increases. The value detected by the right outrigger pressure sensor 8 at terminal 4 to terminal 271 of the controller 13 also gradually increases. When it increases to the set value of the drilling rig, the controller 13 outputs an electrical signal at terminal 143, and the right outrigger solenoid 7 reverses. At this time, the hydraulic oil in the rodless chamber of the right outrigger cylinder 9 cannot flow out, the pressure remains constant, and the right outrigger remains in stable contact with the ground.

[0030] As can be seen from the above structure, the present invention effectively ensures that the left and right outriggers of the drilling rig are in full contact with the ground through hydraulic control of the machinery and electrical detection, preventing the drilling rig from tilting during operation and causing dangerous accidents, thus ensuring the reliability of the drilling rig.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A drilling rig leg control system, characterized by: Including hydraulic control part, electrical detection part and hydraulic oil tank (1); The hydraulic control part includes left support leg control handle (2), left support leg check valve (3), left support leg electromagnetic valve (4), left support leg oil cylinder (6), right support leg control handle (11), right support leg check valve (10), right support leg electromagnetic valve (7), right support leg oil cylinder (9); The left support leg control handle (2) is connected with the rod cavity of left support leg oil cylinder (6) through left support leg check valve (3); The left support leg control handle (2) is connected left support leg electromagnetic valve (4) through left support leg check valve (3), and the left support leg electromagnetic valve (4) is connected with the rodless cavity of left support leg oil cylinder (6), forms left support leg control hydraulic circuit;The right support leg control handle (11) is connected with the rod cavity of right support leg oil cylinder (9) through right support leg check valve (10), the right support leg control handle (11) is connected right support leg electromagnetic valve (7) through right support leg check valve (10), and the right support leg electromagnetic valve (7) is connected with the rodless cavity of right support leg oil cylinder (9), forms right support leg control hydraulic circuit;The oil return port of left support leg control handle (2) and right support leg control handle (11) is connected with hydraulic oil tank (1) through oil filter (12); The electrical detection part includes: left support leg pressure sensor (5), right support leg pressure sensor (8) and controller (13); The left support leg pressure sensor (5) is used to monitor the pressure of the rodless cavity oil port of left support leg oil cylinder (6), and the pressure signal is transmitted to controller (13), and the controller (13) is electrically connected with left support leg electromagnetic valve (4); The right support leg pressure sensor (8) is used to monitor the pressure of the rodless cavity oil port of right support leg oil cylinder (9) and transmits the pressure signal to controller (13), and the controller (13) is electrically connected with right support leg electromagnetic valve (7); The controller (13) can input pressure set value;When the pressure of the rodless cavity oil port of left support leg oil cylinder (6) reaches the set value, the controller (13) receives the pressure signal of left support leg pressure sensor (5), and outputs the electric signal to left support leg electromagnetic valve (4), so as to cut off the oil circuit of the rodless cavity of left support leg oil cylinder (6);When the pressure of the rodless cavity oil port of right support leg oil cylinder (9) reaches the set value, the controller (13) receives the pressure signal of right support leg pressure sensor (8), and outputs the electric signal to right support leg electromagnetic valve (7), so as to cut off the oil circuit of the rodless cavity of right support leg oil cylinder (9).

2. A drilling rig leg control system according to claim 1, characterised in that: The left support leg check valve (3) and right support leg check valve (10) are both bidirectional control check valve.

3. A drilling rig leg control system according to claim 1 or 2, characterised in that, It is applied to deep well drilling machine.

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