Hydraulic synchronous control system for slippage of derrick and base of petroleum drilling machine

Abstract

The utility model discloses a hydraulic synchronous control system for slippage of a derrick and a base of a petroleum drilling machine, which comprises a synchronous control loop, a left cylinder control loop, a right cylinder control loop, a clamping control loop and an up-down slippage switching loop, the synchronous control loop comprises a synchronous control valve, one end of the synchronous control valve is connected with a flow distributing and collecting valve through a control pipeline, a flow distributing opening in one end of the flow distributing and collecting valve is connected with a hydraulic control reversing valve through a third hydraulic control one-way valve, an outlet control pipeline of the hydraulic control reversing valve is divided into two paths, one path is connected with a rodless cavity of the left hydraulic cylinder, and the other path is connected with a shuttle valve. Through the matching effect of the safety valve, the hydraulic control one-way valve, the displacement sensor and the like, four or more handles are not adopted for matching operation in the synchronous sliding process of the derrick and the base of the drilling machine any more, and practicability and more convenience are achieved. And meanwhile, the drilling machine derrick sliding efficiency is improved, operation is convenient, and synchronization precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of offshore oil drilling mechanical equipment, specifically to a kind of oil drilling rig mast, base slip hydraulic synchronous control system. BACKGROUND

[0002] With the continuous improvement of the degree of automation of oil drilling rig, its mast, base slip mode more and more uses hydraulic cylinder push-pull mode.In practical application, affected by the left and right weight of drilling rig mast, base, etc., left and right hydraulic cylinders are always out of sync during the drilling rig slip, which needs to be adjusted manually by hydraulic valve to make them synchronous.The traditional hydraulic synchronous control system has the following problems:

[0003] 1、Operation is complex, and safety and reliability are poor.When left and right hydraulic cylinders are out of sync and need to be adjusted, two hydraulic valve control handles need to be operated simultaneously;Or single-handle operation can be used to adjust left and right hydraulic cylinders to keep them synchronous, but two control handles are needed to cooperate with the action of left and right hydraulic cylinder synchronous extension and contraction, and the system cannot control the speed in real time.The above two traditional hydraulic synchronous control systems have many manual combination actions, and the operation is complex, which is easy to misoperate, and the safety and reliability are poor.

[0004] 2、Manual operation control, low work efficiency.In the process of adjusting left and right hydraulic cylinders to keep them synchronous, the traditional hydraulic synchronous control system uses the hydraulic cylinder that retracts and extends quickly to keep it synchronous with the hydraulic cylinder that extends slowly, which not only saves energy but also increases the time of drilling rig mast and base slip.

[0005] In summary: the traditional hydraulic synchronous control system has low degree of automation, complex operation, poor safety and reliability, and is not energy-saving, which cannot fully meet the safety operation requirements. INVENTION CONTENTS

[0006] The utility model aims at providing a kind of oil drilling rig mast, base slip hydraulic synchronous control system, with the characteristics of independent pressurization of clamping hydraulic cylinder, high-precision synchronization of slip, to solve the problems raised in the background art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of oil drilling rig mast, base slip hydraulic synchronous control system, including synchronous control loop, left cylinder control loop, right cylinder control loop, clamping control loop and up-down slip switching circuit;

[0008] The synchronization control circuit comprises a synchronization control valve, one end of the synchronization control valve is connected with a shunt and collecting valve through a control pipeline, one end of a shunt port of the shunt and collecting valve is connected with a second hydraulic control reversing valve through a third hydraulic control one-way valve, an outlet control pipeline of the second hydraulic control reversing valve is divided into two routes: one route is connected with a rodless cavity of a left hydraulic cylinder, and the other route is connected with a shuttle valve, one route of the shuttle valve is connected with a rod cavity of the left hydraulic cylinder, and the other route is connected with a pressure gauge; the other end of a shunt port of the shunt and collecting valve is connected to a rodless cavity of a right hydraulic cylinder through the second hydraulic control reversing valve;

[0009] The left cylinder control circuit comprises a left cylinder control valve, one route of an outlet of the left cylinder control valve is connected with a first hydraulic control reversing valve, and the first hydraulic control reversing valve is connected with a rod cavity of the left hydraulic cylinder; the right cylinder control circuit comprises a right cylinder control valve, one route of an outlet of the right cylinder control valve is connected with the first hydraulic control reversing valve, and the first hydraulic control reversing valve is connected with a rod cavity of the right hydraulic cylinder;

[0010] The clamping control circuit comprises a clamping cylinder control valve, the clamping cylinder control valve is connected with a pressure booster through a control pipeline, and the pressure booster is connected with the clamping cylinder through a first hydraulic control one-way valve.

[0011] Preferably, a displacement sensor is arranged on the left hydraulic cylinder, and a displacement sensor is arranged on the right hydraulic cylinder.

[0012] Preferably, the synchronization control valve is connected with the first hydraulic control reversing valve through a second hydraulic control one-way valve.

[0013] Preferably, a safety valve is arranged on an outlet pipeline of the pressure booster.

[0014] Preferably, a pressure regulating valve is arranged on an inlet pipeline of the synchronization control valve.

[0015] Preferably, a manual reversing valve is connected in parallel on an inlet and outlet pipeline of the first hydraulic control reversing valve.

[0016] The working process of the utility model is as follows:

[0017] The lifting process of the drilling rig derrick is divided into the following steps:

[0018] 1, drilling rig base synchronous slip: the operation box P, T port and hydraulic power source P, T port are connected correspondingly, the manual reversing valve handle is controlled to switch to the left lower slip, the synchronization control valve handle is guaranteed, high pressure oil enters the plug cavity of the left hydraulic cylinder and the right hydraulic cylinder through the shunt and collecting valve, the hydraulic control one-way valve and the hydraulic control reversing valve, the flow of the high pressure oil is evenly distributed through the shunt and collecting valve, the flow entering the left and right hydraulic cylinders is guaranteed to be the same, the hydraulic cylinders are extended synchronously, and the drilling rig base is synchronously slipped; meanwhile, high pressure oil enters the plug cavity of the clamping cylinder through the clamping cylinder control valve, the pressure booster and the hydraulic control one-way valve, and the pressure is increased to a preset value through the pressure booster, so that the clamping hydraulic cylinder does not slip before the derrick moves.

[0019] 2. Synchronous adjustment during the sliding of the rig base: taking the case that the left cylinder extends more as an example, the left cylinder can be accurately determined to extend more by observing the pressure gauges of the left and right cylinders, the control handle of the synchronous control valve is loosened first, the left and right cylinders stop synchronous sliding, and the hydraulic control check valve is closed. At this time, the right cylinder control valve is operated to change to the right position, high-pressure oil enters the plug cavity of the right cylinder through the right position of the right cylinder control valve and the hydraulic control reversing valve, ensuring that the left cylinder stops and the right cylinder slides, and the data on the corresponding pressure gauges of the left and right hydraulic cylinders are observed. In this way, the cylinder with smaller extension is pushed out by the control valve handle, and finally the left and right cylinders are synchronized, saving energy and sliding time.

[0020] 3. When the upper part of the derrick needs to slide, only the manual reversing valve handle needs to be controlled to switch to the right position for upper part sliding, and the rest of the operation mode is the same.

[0021] In addition, the base and the derrick are lifted in the same way.

[0022] The beneficial effects of the present utility model are:

[0023] (1) The safety valve, the hydraulic control check valve, the left cylinder control valve, the right cylinder control valve, the pressure control valve, the shunt and collector valve, the hydraulic control reversing valve, the pressure gauge and the displacement sensor cooperate to make the synchronous sliding process of the rig derrick and base no longer use 4 or more handle cooperation operations, and the utility is more convenient. At the same time, the efficiency of the rig derrick sliding is improved, the operation is convenient, and the synchronization accuracy is improved.

[0024] (2) The hydraulic control reversing valve and the hydraulic control check valve are used in cooperation to build a hydraulic system sequence control loop, simplify the operation process, and after the manual reversing valve is replaced by an electric control reversing valve, the electrical control principle is simplified, and the automatic control operation is simpler.

[0025] (3) The displacement sensor and the proportional reversing valve realize PID closed-loop control, and one-key sliding and remote sliding of the rig derrick and base can be realized.

[0026] (4) The pressure control valve of the booster is installed at the rear end of the booster to realize real-time supplement of the clamping cylinder pressure, and ensure that the clamping system is safer and more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a system principle diagram of the sliding hydraulic synchronous control of the present utility model;

[0028] Fig. 2 is an integrated operation box appearance diagram of the sliding hydraulic synchronous control of the present utility model;

[0029] In the figure: 1, left cylinder, 2, displacement sensor, 3, right cylinder, 4, pressure gauge, 5, booster, 6, clamping cylinder, 7, first hydraulic control check valve, 8, safety valve, 9, clamping cylinder control valve, 10, right cylinder control valve, 11, left cylinder control valve, 12, synchronization control valve, 13, pressure regulating valve, 14, second hydraulic control check valve, 15, manual reversing valve, 16, first hydraulic control reversing valve, 17, flow dividing and collecting valve, 18, third hydraulic control check valve, 19, second hydraulic control reversing valve, 20, shuttle valve. DETAILED DESCRIPTION

[0030] The utility model makes further detailed explanation in combination with the attached drawing.

[0031] As Figs. 1-2 The utility model discloses a kind of hydraulic synchronous control system of oil drilling derrick, base sliding, it includes synchronization control circuit, left cylinder control circuit, right cylinder control circuit, clamping control circuit and up-down sliding switching circuit;

[0032] Synchronization control circuit includes synchronization control valve 12, synchronization control valve 12 is connected with flow dividing and collecting valve 17 by control pipeline in one end, the one end shunt of flow dividing and collecting valve 17 is connected with second hydraulic control reversing valve 19 by third hydraulic control check valve 18, the outlet control pipeline of second hydraulic control reversing valve 19 is divided into two roads: one road is connected with the rodless chamber of left cylinder 1, another road is connected with shuttle valve 20, one road of shuttle valve 20 is connected with the rod chamber of left cylinder 1, another road is connected with pressure gauge 4;The other end shunt of flow dividing and collecting valve 17 is connected to the rodless chamber of right cylinder 3 by second hydraulic control reversing valve 19;Meanwhile, left cylinder 1 is equipped with displacement sensor 2, and right cylinder 3 is equipped with displacement sensor 2.

[0033] Left cylinder control circuit includes left cylinder control valve 11, and one road outlet of left cylinder control valve 11 is connected with first hydraulic control reversing valve 16, and first hydraulic control reversing valve 16 is connected with the rod chamber of left cylinder 1;Right cylinder control circuit includes right cylinder control valve 10, and one road outlet of right cylinder control valve 10 is connected with first hydraulic control reversing valve 16, and first hydraulic control reversing valve 16 is connected with the rod chamber of right cylinder 3;Clamping control circuit includes clamping cylinder control valve 9, and clamping cylinder control valve 9 is connected with booster 5 by control pipeline, and booster 5 is connected with clamping cylinder 6 by first hydraulic control check valve 7, while safety valve 8 is equipped on the outlet pipeline of booster 5.

[0034] Synchronization control valve 12 is connected with first hydraulic control reversing valve 16 by second hydraulic control check valve 14, while pressure regulating valve 13 is equipped on the inlet pipeline of synchronization control valve 12, and first hydraulic control reversing valve 16 is connected with manual reversing valve 15 in parallel on the inlet and outlet pipeline.

[0035] The working process of the utility model is as follows:

[0036] The drilling rig mast lifting process is divided into the following steps:

[0037] 1. Drilling rig base synchronous sliding: the P and T ports of the operation box are connected with the P and T ports of the hydraulic power source, the handle of the control handover valve 15 is controlled to switch to the left lower sliding, the handle of the synchronous control valve 12 is controlled to ensure that the high-pressure oil enters the plug cavity of the left cylinder 1 and the right cylinder 3 through the shunt manifold valve 17, the hydraulic control one-way valve 18 and the second hydraulic control handover valve 19; because the high-pressure oil is evenly distributed through the shunt manifold valve 17, the flow entering the left and right cylinders is ensured to be the same, the cylinders are synchronously extended, and the drilling rig base is synchronously slid; at the same time, the high-pressure oil enters the plug cavity of the clamping cylinder 6 through the clamping cylinder control valve 9, the pressure booster 5 and the hydraulic control one-way valve 7; because the pressure is increased to the preset value through the pressure booster 5, the clamping cylinder is ensured not to slip before the mast moves.

[0038] 2. Synchronous adjustment during the sliding of the drilling rig base: taking that the left cylinder 1 extends more during the sliding of the base as an example, the left cylinder is accurately judged to extend more by observing the left and right cylinder pressure gauges 4, the control handle of the synchronous control valve 12 is loosened first to switch to the O-shaped function in the middle position, the left and right cylinders stop synchronous sliding, and the hydraulic control one-way valve 14 is closed; at this time, the right cylinder control valve 10 is operated to switch to the right position, the high-pressure oil enters the plug cavity of the right cylinder 3 through the right position of the right cylinder control valve 10 and the first hydraulic control handover valve 16, the left cylinder 1 is ensured to stop, the right cylinder 3 slides, and the data on the corresponding pressure gauges of the left and right hydraulic cylinders are observed; in this way, the cylinder extending less is controlled by the handle of the control valve, and finally the left and right cylinders are ensured to be synchronous, energy is saved, and the sliding time is saved.

[0039] 3. When the upper part of the mast needs to slide, only the handle 15 of the control handover valve needs to be controlled to switch to the right upper sliding, and the rest of the operation modes are the same.

[0040] In addition, the base and the mast lifting process are the same.

[0041] The safety valve, the hydraulic control one-way valve, the left cylinder control valve, the right cylinder control valve, the pressure control valve, the shunt manifold valve, the hydraulic control handover valve, the pressure gauge and the displacement sensor are cooperated to make the synchronous sliding process of the drilling rig mast and the base no longer use 4 handles and more than 4 handles to operate, the utility is more convenient. Meanwhile, the efficiency of the drilling rig mast sliding is improved, the operation is convenient, and the synchronous precision is improved.

[0042] The above is only a preferred example of the utility model. It should be noted that for ordinary skilled persons in the art, under the technical inspiration provided by the utility model, as the common knowledge in the mechanical field, other equivalent variants and improvements can also be made, which should also be regarded as the protection range of the utility model.

Claims

1. A hydraulic synchronous control system for sliding of the derrick and base of an oil drilling rig, characterized in that: It includes a synchronization control circuit, a left cylinder control circuit, a right cylinder control circuit, a clamping control circuit, and an up-and-down sliding switching circuit; The synchronous control loop includes a synchronous control valve (12). One end of the synchronous control valve (12) is connected to a flow divider and combiner valve (17) via a control pipeline. One end of the flow divider and combiner valve (17) is connected to a second hydraulic directional valve (19) via a third hydraulic check valve (18). The outlet control pipeline of the second hydraulic directional valve (19) is divided into two paths: one path is connected to the rodless chamber of the left cylinder (1), and the other path is connected to the shuttle valve (20). One path of the shuttle valve (20) is connected to the rod chamber of the left cylinder (1), and the other path is connected to the pressure gauge (4). The other end of the flow divider and combiner valve (17) is connected to the rodless chamber of the right cylinder (3) via the second hydraulic directional valve (19). The left cylinder control circuit includes a left cylinder control valve (11), one outlet of which is connected to a first hydraulic directional valve (16), and the first hydraulic directional valve (16) is connected to the rod chamber of the left cylinder (1); the right cylinder control circuit includes a right cylinder control valve (10), one outlet of which is connected to the first hydraulic directional valve (16), and the first hydraulic directional valve (16) is connected to the rod chamber of the right cylinder (3); The clamping control circuit includes a clamping cylinder control valve (9), which is connected to the booster (5) through a control pipeline. The booster (5) is connected to the clamping cylinder (6) through a first hydraulic check valve (7).

2. The hydraulic synchronous control system for sliding of the derrick and base of an oil drilling rig according to claim 1, characterized in that: The left liquid cylinder (1) is equipped with a displacement sensor (2), and the right liquid cylinder (3) is equipped with a displacement sensor (2).

3. A hydraulic synchronous control system for sliding the derrick and base of an oil drilling rig according to claim 1 or 2, characterized in that: The synchronous control valve (12) is connected to the first hydraulic directional valve (16) through the second hydraulic check valve (14).

4. The hydraulic synchronous control system for sliding of the derrick and base of an oil drilling rig according to claim 3, characterized in that: A safety valve (8) is installed on the outlet pipeline of the booster (5).

5. The hydraulic synchronous control system for sliding of the derrick and base of an oil drilling rig according to claim 4, characterized in that: The synchronous control valve (12) is equipped with a pressure regulating valve (13) on its inlet pipe.

6. The hydraulic synchronous control system for sliding of the derrick and base of an oil drilling rig according to claim 5, characterized in that: Manual directional valves (15) are connected in parallel on the inlet and outlet pipelines of the first hydraulic directional valve (16).

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