Drilling fluid uninterrupted circulation control equipment for low-pressure-consumption well drilling

Abstract

The invention discloses drilling fluid uninterrupted circulation control equipment for low-pressure-consumption well drilling. The equipment comprises an electric control gate valve, an electric control throttle valve, a manual gate valve, a high-pressure manifold, a pressure sensor, a slurry filtering device, a control system cabinet and a skid-mounted device, and the high-pressure manifold comprises a high-pressure straight pipe, a high-pressure bent pipe, a flange conversion union joint and a square block connecting piece. And the equipment parts are connected through flanges. By means of the equipment, two flow channels are provided for drilling fluid circulation, continuous circulation of drilling fluid can be achieved by switching the flow channels under the condition of low pressure consumption, an operator completes switching of the drilling fluid circulation flow channels by controlling an electric control valve in the equipment through a control system cabinet, one-button type automatic switching can be achieved, and the operation cost is reduced. The device is large in inner flow channel drift diameter, low in pressure consumption and high in automation degree, the whole device is integrated into a skid-mounted device, assembly, disassembly and transportation are very convenient, and the device is suitable for being used on an offshore drilling platform.

Description

Technical Field

[0001] The invention relates to the field of oil drilling, in particular to the technical field of uninterrupted circulation of drilling fluid in drilling technology, and specifically to an uninterrupted circulation control device for drilling fluid with low pressure loss. Background Art

[0002] The drilling fluid uninterrupted circulation drilling technology can maintain the circulation of drilling fluid during the process of connecting and removing the drill string, avoiding a series of complex problems caused by stopping the pump operation. It can be widely used in the fields of narrow density window wells, deep wells, underbalanced wells, large displacement wells and high temperature and high pressure wells. However, the current drilling fluid uninterrupted circulation equipment has a low degree of automation, high pressure loss, high operating costs, and brings more dangers to operators. Therefore, it is necessary to develop uninterrupted circulation control equipment with high automation and low pressure loss. Summary of the invention

[0003] The purpose of the present invention is to provide two flow channels for drilling fluid circulation, and the flow channels can be switched under low pressure loss to realize uninterrupted circulation of drilling fluid. The operator controls the electric control valve inside the equipment through the control system cabinet to complete the switching of the drilling fluid circulation flow channel, which can realize one-button automatic switching and reduce the operation cost. The internal flow channel of this equipment has a large diameter, low pressure loss, and a high degree of automation. The whole set of equipment is integrated into a skid, which is very convenient for assembly, disassembly and transportation, and is suitable for use on offshore drilling platforms.

[0004] The present invention provides a low-pressure-loss drilling fluid uninterrupted circulation control device, which solves the above-mentioned problems.

[0005] A technical solution adopted by the present invention is: to provide a low-pressure-loss drilling fluid uninterrupted circulation control device, the device includes an electrically controlled gate valve, an electrically controlled throttle valve, a manual gate valve, a high-pressure manifold, a pressure sensor, a mud filter, a control system cabinet, and a skid-mounted frame. The high-pressure manifold includes a high-pressure straight pipe, a high-pressure elbow, a flange conversion union, and a square block connector; the electrically controlled gate valve includes a first electrically controlled gate valve, a second electrically controlled gate valve, a third electrically controlled gate valve, a fourth electrically controlled gate valve, a fifth electrically controlled gate valve, and a sixth electrically controlled gate valve; the electrically controlled throttle valve includes a first electrically controlled throttle valve, a second electrically controlled throttle valve, and a third electrically controlled throttle valve; the manual gate valve includes a first manual gate valve, a second manual gate valve, and a third manual gate valve; the high-pressure straight pipe includes a first high-pressure straight pipe, a second high-pressure straight pipe, a third high-pressure straight pipe, a fourth high-pressure straight pipe, a fifth high-pressure straight pipe, a sixth high-pressure straight pipe, and a seventh high-pressure straight pipe. Straight pipe, eighth high-pressure straight pipe; the high-pressure bent pipe includes a first high-pressure bent pipe and a second high-pressure bent pipe; the flange conversion union includes a first flange conversion union, a second flange conversion union, a third flange conversion union, a fourth flange conversion union, a fifth flange conversion union; the square block connector includes a first square block connector, a second square block connector, a third square block connector, a fourth square block connector, a fifth square block connector, and a sixth square block connector; the pressure sensor includes a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor; the mud filtering device is connected to the first flange conversion union as a mud input port; the control system cabinet collects and outputs pressure sensor data, and the control system cabinet controls the opening and closing of the electric control valve; a lifting hole is provided on the top of the skid-mounted frame, and a forklift hole is provided on the bottom of the skid-mounted frame.

[0006] The low-pressure-loss drilling fluid uninterrupted circulation control device provides two circulation channels, a main circulation channel and a side circulation channel, for the circulation of the drilling fluid. The first electrically controlled gate valve and the first electrically controlled throttle valve control the main circulation channel, and the second electrically controlled gate valve and the second electrically controlled throttle valve control the side circulation channel. Among them, the uninterrupted circulation control device for low-pressure drilling drilling fluid is provided with a separate pump replenishment inlet, the third electrically controlled gate valve controls the replenishment of the main circulation flow channel, and the fourth electrically controlled gate valve controls the replenishment of the side circulation flow channel; Among them, the low-pressure-loss drilling fluid uninterrupted circulation control device is provided with a pressure relief output port, the fifth electrically-controlled gate valve controls the pressure relief of the main circulation flow channel, the sixth electrically-controlled gate valve controls the pressure relief of the side circulation flow channel, and the third electrically-controlled throttle valve controls the pressure of the pressure relief output port; Among them, the low-pressure consumption drilling fluid uninterrupted circulation control equipment is provided with an emergency backup passage, and the first manual gate valve, the second manual gate valve, and the third manual gate valve control the opening and closing of the emergency backup passage.

[0007] Among them, the first high-pressure straight pipe is connected with the first electrically controlled throttle valve and the second square block connector respectively, the second high-pressure straight pipe is connected with the third manual gate valve and the mud filtering device respectively to form an emergency backup passage; the third high-pressure straight pipe is connected with the third electrically controlled gate valve and the second square block connector respectively to form a main circulation fluid replenishment passage, the fourth high-pressure straight pipe is connected with the fourth electrically controlled gate valve and the sixth square block connector respectively to form a side circulation fluid replenishment passage, the seventh high-pressure straight pipe is connected with the sixth square block connector and the fourth flange conversion joint to form a separate pump fluid replenishment input port; the fifth high-pressure straight pipe is connected with the second electrically controlled throttle valve and the fifth square block connector respectively to form a side circulation passage, the sixth high-pressure straight pipe is connected with the fifth square block connector and the third flange conversion joint to form a side circulation output port; the eighth high-pressure straight pipe is connected with the fourth square block connector and the third electrically controlled throttle valve respectively to form a pressure relief passage.

[0008] Among them, the first high-pressure elbow is connected with the fifth electrically controlled gate valve and the fourth square block connector to form a main circulation pressure relief passage, and the second high-pressure elbow is connected with the second electrically controlled gate valve and the second electrically controlled throttle valve to form a side circulation passage.

[0009] Among them, the first flange conversion is connected to the mud filtering device by a n-type joint to form a mud input port, the second flange conversion is connected to the third-party block connector by a n-type joint to form a main circulation channel output port, and the fifth flange conversion is connected to the third electronically controlled throttle valve by a n-type joint to form a pressure relief output port.

[0010] Among them, the low-pressure-loss drilling drilling fluid uninterrupted circulation control equipment is equipped with a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor; the first pressure sensor is arranged on the outer wall of the mud filtering device; the second pressure sensor is arranged on the third square block connector; the third pressure sensor is arranged on the fifth square block connector; the fourth pressure sensor is arranged on the fourth square block connector.

[0011] Wherein, the control system cabinet adopts electric control to realize equipment control.

[0012] Wherein, a mud filter net is arranged inside the mud filter device.

[0013] Wherein, a lifting hole is arranged at the top of the skid-mounted frame, and a forklift hole is arranged at the bottom of the skid-mounted frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides two flow channels for drilling fluid circulation through the above equipment, and can switch the flow channels under low pressure loss to achieve uninterrupted circulation of drilling fluid. The operator controls the electric control valve inside the equipment through the control system cabinet to complete the switching of the drilling fluid circulation flow channel, which can achieve one-button automatic switching and reduce the operating cost. The internal flow channel of this equipment has a large diameter, low pressure loss, and a high degree of automation. The whole set of equipment is integrated into a skid, which is very convenient to assemble, disassemble and transport, and is suitable for use on offshore drilling platforms. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention. Figure 1 It is a right-side view system structure diagram of a low-pressure-loss drilling fluid uninterrupted circulation control device according to an embodiment of the present invention.

[0016] Figure 2 It is a rear side view system structure diagram of a low pressure loss drilling drilling fluid uninterrupted circulation control device according to an embodiment of the present invention.

[0017] Figure 3 It is a left-side perspective system structure diagram of a low-pressure-loss drilling fluid uninterrupted circulation control device for drilling according to an embodiment of the present invention.

[0018] Description of labels: 1. The third square block connector; 2. The second pressure sensor; 3. The second manual gate valve; 4. The second square block connector; 5. The first high-pressure straight pipe; 6. The first electric-controlled throttle valve; 7. The first electric-controlled gate valve; 8. The first square block connector; 9. The second electric-controlled gate valve; 10. The second high-pressure elbow; 11. The seventh high-pressure straight pipe; 12. The sixth square block connector; 13. The third electric-controlled gate valve; 14. The third high-pressure straight pipe; 15. The first flange conversion union; 16. The second high-pressure straight pipe; 17. The fifth electric-controlled gate valve; 18. The third manual gate valve; 19. The second flange conversion union; 20. The fourth flange conversion union head; 21 third flange conversion union; 22 second electric control throttle valve; 23 sixth electric control gate valve; 24 fourth square block connector; 25 control system cabinet; 26 skid-mounted frame; 27 mud filtering device; 28 fifth flange conversion union; 29 first pressure sensor; 30 third electric control throttle valve; 31 sixth high-pressure straight pipe; 32 fifth square block connector; 33 fourth high-pressure straight pipe; 34 fourth electric control gate valve; 35 fifth high-pressure straight pipe; 36 first manual gate valve; 37 fourth pressure sensor; 38 third pressure sensor; 39 first high-pressure elbow; 40 eighth high-pressure straight pipe. DETAILED DESCRIPTION

[0019] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0020] Please refer to the attached Figure 1 , Attachment Figure 2 And attached Figure 3 The technical solution of the present invention provides a low-pressure-loss drilling fluid uninterrupted circulation control device, including an electric-controlled gate valve, an electric-controlled throttle valve, a manual gate valve, a high-pressure manifold, a pressure sensor, a mud filter, a control system cabinet, and a skid-mounted frame. The high-pressure manifold includes a high-pressure straight pipe, a high-pressure elbow, a flange conversion union, and a square block connector; the electric-controlled gate valve includes a first electric-controlled gate valve 7, a second electric-controlled gate valve 9, a third electric-controlled gate valve 13, a fourth electric-controlled gate valve 34, and a fifth electric-controlled gate valve. The electric-controlled throttle valve includes the first electric-controlled throttle valve 6, the second electric-controlled throttle valve 22, and the third electric-controlled throttle valve 30; the manual gate valve includes the first manual gate valve 36, the second manual gate valve 3, and the third manual gate valve 18; the high-pressure straight pipe includes the first high-pressure straight pipe 5, the second high-pressure straight pipe 16, the third high-pressure straight pipe 14, the fourth high-pressure straight pipe 33, the fifth high-pressure straight pipe 35, the sixth high-pressure straight pipe 31, the seventh high-pressure straight pipe 11, and the eighth high-pressure straight pipe 40; the high-pressure elbow comprises a first high-pressure elbow 39 and a second high-pressure elbow 10; the flange conversion union comprises a first flange conversion union 15, a second flange conversion union 19, a third flange conversion union 21, a fourth flange conversion union 20, and a fifth flange conversion union 28; the square block connector comprises a first square block connector 8, a second square block connector 4, a third square block connector 1, a fourth square block connector 24, a fifth square block connector 32, and a sixth square block connector 12; the pressure sensor comprises a first pressure sensor 29, a second pressure sensor 2, a third pressure sensor 38, and a fourth pressure sensor 37; the mud filtering device 27 is connected to the first flange conversion union 15 as a mud input port; the control system cabinet 25 collects and outputs pressure sensor data, and the control system cabinet controls the opening and closing of the electric control valve 25; a hoisting hole is provided on the top of the skid-mounted frame 26, and a forklift hole is provided on the bottom of the skid-mounted frame 26.

[0021] In the technical solution of the present invention, the diameter of the main circulation flow channel which is often in use is 89 mm, and the overall layout is optimized so that the main circulation flow channel only turns twice, thus meeting the demand for low pressure loss.

[0022] The valve, the high-pressure manifold, the square block connector and the joints are all connected by flange connection.

[0023] The low-pressure-loss drilling fluid uninterrupted circulation control device is provided with three output ports and two input ports, and the output ports and the input ports are connected by unions, which is convenient for actual installation and disassembly.

[0024] The output port includes a main circulation output port, a side circulation output port and a pressure relief output port.

[0025] The input port includes a mud input port and a separate pump liquid replenishment input port.

[0026] A preferred technical solution in the present technical solution is that the low-pressure-loss drilling fluid uninterrupted circulation control device is provided with a separate pump replenishment inlet, and a separate pump replenishment method can be adopted.

[0027] The mud filter device 27 is provided with a filter screen inside, and the filter screen removes large particles in the mud to prevent the large particles from entering the equipment and causing damage.

[0028] The control system cabinet is installed in the skid-mounted frame 26 and adopts an electric control method, with two modes: automatic control and manual control.

[0029] In addition, the main circulation flow channel is controlled by the first electrically controlled gate valve 7 and the first electrically controlled throttle valve 6, and the side circulation flow channel is controlled by the second electrically controlled gate valve 9 and the second electrically controlled throttle valve 22. The electrically controlled gate valve is responsible for controlling the opening and closing of the flow channel, and the electrically controlled throttle valve is responsible for adjusting the flow and pressure in the flow channel.

[0030] The low-pressure-loss drilling fluid uninterrupted circulation control equipment is provided with four pressure sensors, including a first pressure sensor 29, a second pressure sensor 2, a third pressure sensor 38, and a fourth pressure sensor 37. The first pressure sensor 29 is installed on the outer wall at the inlet of the mud filter device 27 to monitor the pressure at the mud inlet, the second pressure sensor 2 is installed on the outer wall of the third square block connector 1 to monitor the main circulation channel pressure, the third pressure sensor 38 is installed on the outer wall of the fifth square block connector 32 to monitor the side circulation channel pressure, and the fourth pressure sensor 37 is installed on the outer wall of the fourth square block connector to monitor the pressure of the pressure relief channel.

[0031] The working principle of the low pressure loss drilling fluid uninterrupted circulation control device in the technical solution of the present invention will be described below in conjunction with specific embodiments: The first flange conversion union 15 is connected to the mud input pipeline, and the mud enters the mud filtering device 27 through the first flange conversion union 15. The filtered mud flows through the first manual gate valve 36, the first square block connector 8, the first electric-controlled gate valve 7, the first electric-controlled throttle valve 6, the first high-pressure straight pipe 5, the second square block connector 4, the second manual gate valve 3, the third square block connector 1, and finally flows out from the second flange conversion union 19, which is the main circulation flow channel.

[0032] When it is necessary to switch the drilling fluid flow channel, the side circulation flow channel is replenished first. There are two replenishment methods to choose from: one is a single pump replenishment method, that is, the fourth flange conversion is connected to a single small-displacement pump by the nipple joint 20, the small-displacement pump and the fourth electrically controlled gate valve 34 are opened, and the mud flows in from the fourth flange conversion by the nipple joint, and flows through the seventh high-pressure straight pipe 11, the sixth square block connector 12, the fourth high-pressure straight pipe 33, and the fourth electrically controlled gate valve 34 in sequence to replenish the side circulation; the other is a double-circulation replenishment method, that is, a part of the mud is diverted through the main circulation flow channel to replenish the side circulation flow channel, the second electrically controlled gate valve 9 and the second electrically controlled throttle valve 22 are opened, the mud is diverted from the first square block connector 8, and flows through the second electrically controlled gate valve 9, the second high-pressure elbow 10, and the second electrically controlled throttle valve 22 in sequence to replenish the side circulation flow channel.

[0033] After the fluid replenishment is completed, close the relevant components opened during the fluid replenishment operation, completely close the first electrically controlled gate valve 7 and the first electrically controlled throttle valve 6, completely open the second electrically controlled gate valve 9 and the second electrically controlled throttle valve 22, switch the flow channel to the side circulation flow channel, open the fifth electrically controlled gate valve 17 and the third electrically controlled throttle valve 30 to release the pressure in the main circulation flow channel, and then close the fifth electrically controlled gate valve 17 and the third electrically controlled throttle valve 30.

[0034] Similarly, controlling the opening and closing of the corresponding valves can also realize the switching of the side circulation flow channel to the main circulation flow channel.

[0035] Through the technical solution of the present invention, automatic control of uninterrupted circulation of mud is achieved under low pressure loss. The equipment can realize one-button automatic switching of mud flow channels, reducing labor costs. This set of equipment has a large internal flow channel diameter, low pressure loss, high degree of automation, high safety performance, and the whole set of equipment is integrated into a skid, which is very convenient for assembly, disassembly and transportation, and is suitable for use on offshore drilling platforms.

[0036] The present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the structure and principle of the present invention. The present invention may be improved and varied, and these improvements and variations shall all fall within the protection scope of the appended claims of the present invention.

Claims

1. A low pressure loss drilling fluid uninterrupted circulation control device, characterized in that: It includes an electrically controlled gate valve, an electrically controlled throttle valve, a manual gate valve, a high-pressure manifold, a pressure sensor, a mud filtering device, a control system cabinet, and a skid-mounted frame. The high-pressure manifold includes a high-pressure straight pipe, a high-pressure elbow, a flange conversion union, and a square block connector; the electrically controlled gate valve includes a first electrically controlled gate valve, a second electrically controlled gate valve, a third electrically controlled gate valve, a fourth electrically controlled gate valve, a fifth electrically controlled gate valve, and a sixth electrically controlled gate valve; the electrically controlled throttle valve includes a first electrically controlled throttle valve, a second electrically controlled throttle valve, and a third electrically controlled throttle valve; the manual gate valve includes a first manual gate valve, a second manual gate valve, and a third manual gate valve; the high-pressure straight pipe includes a first high-pressure straight pipe, a second high-pressure straight pipe, a third high-pressure straight pipe, a fourth high-pressure straight pipe, a fifth high-pressure straight pipe, a sixth high-pressure straight pipe, a seventh high-pressure straight pipe, and an eighth high-pressure straight pipe; the high-pressure elbow includes a first a high-pressure elbow and a second high-pressure elbow; the flange conversion union includes a first flange conversion union, a second flange conversion union, a third flange conversion union, a fourth flange conversion union and a fifth flange conversion union; the square block connector includes a first square block connector, a second square block connector, a third square block connector, a fourth square block connector, a fifth square block connector and a sixth square block connector; the pressure sensor includes a first pressure sensor, a second pressure sensor, a third pressure sensor and a fourth pressure sensor; the mud filtering device is connected to the first flange conversion union as a mud input port; the control system cabinet collects and outputs pressure sensor data, and the control system cabinet controls the opening and closing of the electric control valve; a lifting hole is provided on the top of the skid-mounted frame, and a forklift hole is provided on the bottom of the skid-mounted frame.

2. The low pressure loss drilling fluid uninterrupted circulation control device according to claim 1 is characterized in that: The low-pressure consumption drilling fluid uninterrupted circulation control device provides two main and side circulation flow channels for drilling fluid circulation, the first electrically controlled gate valve and the first electrically controlled throttle valve control the main circulation flow channel, and the second electrically controlled gate valve and the second electrically controlled throttle valve control the side circulation flow channel; the low-pressure consumption drilling fluid uninterrupted circulation control device is provided with a separate pump replenishment input port, the third electrically controlled gate valve controls the replenishment of the main circulation flow channel, and the fourth electrically controlled gate valve controls the replenishment of the side circulation flow channel; the low-pressure consumption drilling fluid uninterrupted circulation control device is provided with a pressure relief output port, the fifth electrically controlled gate valve controls the pressure relief of the main circulation flow channel, the sixth electrically controlled gate valve controls the pressure relief of the side circulation flow channel, and the third electrically controlled throttle valve controls the pressure of the pressure relief output port; the low-pressure consumption drilling fluid uninterrupted circulation control device is provided with an emergency backup passage, and the first manual gate valve, the second manual gate valve, and the third manual gate valve control the opening and closing of the emergency backup passage.

3. The low pressure loss drilling fluid uninterrupted circulation control device according to claim 1 is characterized in that: The first high-pressure straight pipe is respectively connected with the first electrically controlled throttle valve and the second square block connector, the second high-pressure straight pipe is respectively connected with the third manual gate valve and the mud filtering device to form an emergency backup passage; the third high-pressure straight pipe is respectively connected with the third electrically controlled gate valve and the second square block connector to form a main circulation fluid replenishment passage, the fourth high-pressure straight pipe is respectively connected with the fourth electrically controlled gate valve and the sixth square block connector to form a side circulation fluid replenishment passage, the seventh high-pressure straight pipe is respectively connected with the sixth square block connector and the fourth flange conversion joint to form a separate pump fluid replenishment input port; the eighth high-pressure straight pipe is respectively connected with the fourth square block connector and the third electrically controlled throttle valve to form a pressure relief passage; the fifth high-pressure straight pipe is respectively connected with the second electrically controlled throttle valve and the fifth square block connector to form a side circulation passage, and the sixth high-pressure straight pipe is respectively connected with the fifth square block connector and the third flange conversion joint to form a side circulation output port.

4. The low pressure loss drilling fluid uninterrupted circulation control device according to claim 1 is characterized in that: The first high-pressure elbow is connected to the fifth electrically controlled gate valve and the fourth square block connector to form a main circulation pressure relief passage, and the second high-pressure elbow is connected to the second electrically controlled gate valve and the second electrically controlled throttle valve to form a side circulation passage.

5. The low pressure loss drilling fluid uninterrupted circulation control device according to claim 1 is characterized in that: The first flange conversion union is connected to the mud filtering device to form a mud input port, the second flange conversion union is connected to the third rectangular block connector to form a main circulation flow channel output port, and the fifth flange conversion union is connected to the third electronically controlled throttle valve to form a pressure relief output port.

6. The low pressure loss drilling fluid uninterrupted circulation control device according to claim 1 is characterized in that: The low-pressure-loss drilling fluid uninterrupted circulation control equipment is provided with a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor; the first pressure sensor is arranged on the outer wall of the mud filtering device; the second pressure sensor is arranged on the third square block connecting piece; the third pressure sensor is arranged on the fifth square block connecting piece; the fourth pressure sensor is arranged on the fourth square block connecting piece.

7. The low pressure loss drilling fluid uninterrupted circulation control device according to claim 1 is characterized in that: The control system cabinet uses electric control to achieve equipment control.

8. The low pressure loss drilling fluid uninterrupted circulation control device according to claim 1 is characterized in that: A mud filter net is arranged inside the mud filter device.

9. The low pressure loss drilling fluid uninterrupted circulation control device according to claim 1 is characterized in that: The top of the skid-mounted frame is provided with a hoisting hole, and the bottom of the skid-mounted frame is provided with a forklift hole.

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