Electric control positive flow multi-mode control system of deep well drilling rig

Abstract

The invention discloses an electric control positive flow multi-mode control system for a deep well drilling rig, and belongs to the technical field of drilling rig electro-hydraulic control, the system comprises an electric control pump assembly, the electric control pump assembly comprises a first electric control pump, a second electric control pump, a third electric control pump and a fourth electric control pump, and each electric control pump comprises a displacement control valve and a pressure control valve; the first positive flow valve bank and the second positive flow valve bank are connected to different executing mechanisms through a plurality of one-way valves, overflow valves, reversing valves and selection valves, and the control system is used for controlling displacement control valves and pressure control valves of all electric control pumps in the electric control pump assembly. The reversing valves and the selection valves are arranged in the first positive flow valve set and the second positive flow valve set, so that full-electric-control positive flow multi-mode control is achieved; the controllability of the multi-mode control composite action is improved, and the action response speed and the working efficiency of the drilling machine are improved.

Description

Technical Field

[0001] The invention relates to an electric-controlled positive flow multi-mode control system for a deep well drilling rig, belonging to the technical field of drilling rig electro-hydraulic control. Background Art

[0002] Drilling rigs, such as rescue drilling rigs, are the main equipment for underground accident rescue and are increasingly widely used. They mainly rely on the rotation and feeding of the power head to achieve drilling construction. Depending on the different strata and construction processes, especially when driven by dual power heads, multiple actions are usually required. Due to the need for rescue, the requirements for action response speed and construction efficiency are increasing. At present, most domestic drilling rigs use load-sensitive systems, and the combination of multiple actions is prone to incoordination and slow action response speed, which cannot meet the requirements of efficient construction. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an electric-controlled positive flow multi-mode control system for a deep well drilling rig, increase the controllability of the multi-mode control compound action, and improve the action response speed and work efficiency of the drilling rig.

[0004] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides an electric-controlled positive flow multi-mode control system for a deep well drilling rig, comprising: The electronically controlled pump assembly includes electronically controlled pump 1, electronically controlled pump 2, electronically controlled pump 3 and electronically controlled pump 4, each electronically controlled pump includes a displacement control valve and a pressure control valve, the outlets of electronically controlled pump 1 and electronically controlled pump 2 are respectively connected to the P1 and P2 ports of the positive flow valve group 1, and the outlets of electronically controlled pump 3 and electronically controlled pump 4 are respectively connected to the P3 and P4 ports of the positive flow valve group 2; Positive flow valve group 1 and positive flow valve group 2, each of which comprises a plurality of one-way valves, overflow valves, reversing valves and selection valves, and the positive flow valve group 1 and positive flow valve group 2 are connected to different actuators through the plurality of one-way valves, overflow valves, reversing valves and selection valves, wherein the one-way valve is used to prevent the reverse flow of oil, the overflow valve is used to limit the maximum pressure of the valve group, the reversing valve is used to switch the flow direction of oil, and the selection valve is used to select whether to supply high-pressure oil to different actuators; The control system is used to control the displacement control valve and pressure control valve of each electronically controlled pump in the electronically controlled pump assembly, as well as the reversing valve and selection valve in the positive flow valve group 1 and the positive flow valve group 2, so as to realize full electronically controlled positive flow multi-mode control.

[0005] Further, the actuator includes a top drive motor, a top drive cylinder, a casing drive cylinder and a casing drive motor, the positive flow valve group 1 includes ports T1 and T2, ports A1 and B1, ports A2 and B2, and ports A3 and B3, and the positive flow valve group 2 includes ports T3 and T4, ports A4 and B4, ports A5 and B5, and ports A6 and B6, wherein: The T1 and T2 ports are connected to the hydraulic oil tank, the A1 and B1 ports are connected to the top drive motor, the A2 and B2 ports are connected to the top drive cylinder, and the A3 and B3 ports are connected to the casing drive cylinder; The T3 and T4 ports are connected to the hydraulic oil tank, the A4 and B4 ports are connected to the A1 and B1 ports of the top drive motor and the positive flow valve group, the A5 and B5 ports are connected to the A2 and B2 ports of the top drive cylinder and the positive flow valve group, and the A6 and B6 ports are connected to the casing drive motor.

[0006] Further, the positive flow valve group 1 includes a first one-way valve 51, a first relief valve 52, a sixth one-way valve 514, a first top drive rotation reversing valve 53, a top drive rotation selection valve 54, a fifth one-way valve 513, a first flow regeneration reversing valve 55, a first top drive lifting and releasing reversing valve 56, a second one-way valve 57, a first top drive lifting and releasing selection valve 511, a fourth one-way valve 512, a casing lifting and releasing reversing valve 58, a third one-way valve 59 and a casing lifting and releasing selection valve 510; The first one-way valve 51 is arranged between the P1 port and the first overflow valve 52 , the first overflow valve 52 is arranged between the T1 port and the T2 port, and the sixth one-way valve 514 is arranged between the P2 port and the first overflow valve 52 ; The first top drive rotation reversing valve 53 is arranged between the T1 port and the T2 port, and the first top drive rotation reversing valve 53 is connected to the top drive motor through the A1 port and the B1 port, the top drive rotation selection valve 54 is arranged between the P1 port and the first top drive rotation reversing valve 53, and the fifth check valve 513 is arranged between the P2 port and the first top drive rotation reversing valve 53; The first top drive lifting and releasing reversing valve 56 is arranged between the T1 port and the T2 port, and the first top drive lifting and releasing reversing valve 56 is connected to the top drive oil cylinder through the A2 port and the B2 port. One end of the first flow regeneration reversing valve 55 is connected to the T2 port, one end is connected to the B2 port through the fourth one-way valve 512, one end is directly connected to the B2 port, and the other end is connected to the first top drive lifting and releasing reversing valve 56. The second one-way valve 57 is arranged between the P1 port and the first top drive lifting and releasing reversing valve 56. The first top drive lifting and releasing selection valve 511 is arranged between the P2 port and the first top drive lifting and releasing reversing valve 56. The casing lifting and releasing reversing valve 58 is arranged between the T1 port and the T2 port, and the casing lifting and releasing reversing valve 58 is connected to the casing driving cylinder through the A3 and B3 ports. The third one-way valve 59 is arranged between the P1 port and the casing lifting and releasing reversing valve 58. The casing lifting and releasing selection valve 510 is arranged between the P2 port and the casing lifting and releasing reversing valve 58.

[0007] Further, the positive flow valve group 2 includes a seventh one-way valve 61, a second overflow valve 62, a thirteenth one-way valve 614, a second top drive rotation reversing valve 63, an eighth one-way valve 64, a twelfth one-way valve 613, a second flow regeneration reversing valve 65, a second top drive lifting and releasing reversing valve 66, a second top drive lifting and releasing selection valve 67, a tenth one-way valve 611, an eleventh one-way valve 612, a casing rotation reversing valve 68, a ninth one-way valve 69 and a casing rotation selection valve 610; The seventh one-way valve 61 is arranged between the P3 port and the second relief valve 62, the second relief valve 62 is arranged between the T3 port and the T4 port, and the thirteenth one-way valve 614 is arranged between the P4 port and the second relief valve 62; The second top drive rotary reversing valve 63 is arranged between the T3 port and the T4 port, and the second top drive rotary reversing valve 63 is connected to the top drive motor and the A1 and B1 ports of the positive flow valve group 1 through the A4 and B4 ports, the eighth check valve 64 is arranged between the P3 port and the second top drive rotary reversing valve 63, and the twelfth check valve 613 is arranged between the P4 port and the second top drive rotary reversing valve 63; The second top drive lifting and releasing reversing valve 66 is arranged between the T3 port and the T4 port, and the second top drive lifting and releasing reversing valve 66 is connected to the A2 and B2 ports of the top drive oil cylinder and the positive flow valve group 1 through the A5 and B5 ports, one end of the second flow regeneration reversing valve 65 is connected to the T4 port, one end is connected to the B5 port through the eleventh one-way valve 612, one end is directly connected to the B5 port, and the other end is connected to the second top drive lifting and releasing reversing valve 66, the second top drive lifting and releasing selection valve 67 is arranged between the P3 port and the second top drive lifting and releasing reversing valve 66, and the tenth one-way valve 611 is arranged between the P4 port and the second top drive lifting and releasing reversing valve 66; The sleeve rotation reversing valve 68 is arranged between the T3 port and the T4 port, and the sleeve rotation reversing valve 68 is connected to the sleeve driving motor through the A6 and B6 ports. The ninth one-way valve 69 is arranged between the P3 port and the sleeve rotation reversing valve 68. The sleeve rotation selection valve 610 is arranged between the P4 port and the sleeve rotation reversing valve 68.

[0008] Further, the control system includes five operation modes: normal mode, main lifting mode, main rotation mode and casing mode; In normal mode, the rotation of the top drive motor and the extension and retraction of the top drive cylinder are independently or compound controlled by the electronically controlled pump according to the signal from the operating handle; In the main lifting mode, according to the signal of the operating handle, the telescopic action of the top drive cylinder is controlled by the electronically controlled pump first, while the rotation action of the top drive motor is allowed; In the main rotation mode, the top drive motor's rotation is preferentially controlled by the electronically controlled pump, while the top drive cylinder's extension and retraction are allowed; In casing mode, the rotation of the top drive motor, the extension and retraction of the top drive cylinder, the rotation of the casing drive motor and the extension and retraction of the casing drive cylinder are simultaneously controlled by the electronically controlled pump, and these actions can be performed individually or in combination.

[0009] Furthermore, the system also includes a drilling mode. In the drilling mode, the extension and retraction speed of the top drive cylinder are increased by the first flow regeneration reversing valve and the second flow regeneration reversing valve.

[0010] Further, in the casing mode, at least one of the conventional mode, the main lifting mode or the main rotation mode can be opened synchronously.

[0011] Furthermore, the tripping mode can be turned on simultaneously with any other mode.

[0012] Furthermore, in any mode, the system allows stepless adjustment of the flow rate and maximum pressure supplied to the action currently being performed.

[0013] In a second aspect, the present invention provides a drilling rig, comprising the deep well drilling rig electrically controlled positive flow multi-mode control system as described in any one of the aforementioned items.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a deep well drilling rig electric positive flow multi-mode control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the electric positive flow multi-mode control system for a deep well drilling rig provided by the present invention; Figure 2 is a schematic diagram of an electronically controlled pump 1; Figure 3 is a schematic diagram of the second electronically controlled pump; Figure 4 is a schematic diagram of the electronically controlled pump 3; Figure 5 is a schematic diagram of the electronically controlled pump 4; Figure 6 It is a schematic diagram of positive flow valve group 1; Figure 7 It is a schematic diagram of positive flow valve group 2; Figure 8 Controller input and output diagram.

[0016] In the figure, 1, electronically controlled pump 1; 11, pump 1 displacement control valve; 12, pump 1 pressure control valve; 2, electronically controlled pump 2; 21, pump 2 displacement control valve; 22, pump 2 pressure control valve; 3, electronically controlled pump 3; 31, pump 3 displacement control valve; 32, pump 3 pressure control valve; 4, electronically controlled pump 4; 41, pump 4 displacement control valve; 42, pump 4 pressure control valve; 5, positive flow valve group 1; 51, first check valve; 52, first overflow valve; 53, first top drive rotary reversing valve; 54, top drive rotary selection valve; 55, first flow regeneration reversing valve; 56, first top drive lifting and releasing reversing valve; 57, second check valve; 58, casing lifting and releasing reversing valve; 59, third check valve; 510, casing lifting and releasing selection valve; 5 11. The first top drive lifting and releasing selection valve; 512. The fourth one-way valve; 513. The fifth one-way valve; 514. The sixth one-way valve; 6. The second positive flow valve group; 61. The seventh one-way valve; 62. The second overflow valve; 63. The second top drive rotation reversing valve; 64. The eighth one-way valve; 65. The second flow regeneration reversing valve; 66. The second top drive lifting and releasing reversing valve; 67. The second top drive lifting and releasing selection valve; 68. The casing rotation reversing valve; 69. The ninth one-way valve; 610. The casing rotation selection valve; 611. The tenth one-way valve; 612. The eleventh one-way valve; 613. The twelfth one-way valve; 614. The thirteenth one-way valve; 7. The top drive motor; 8. The top drive cylinder; 9. The casing drive cylinder; 10. The casing drive motor. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0020] Embodiment 1, as Figure 1-Figure 8 As shown, this embodiment introduces a deep well drilling rig electric positive flow multi-mode control system, including: like Figure 1-Figure 5 As shown, there are four electronically controlled pumps, each of which includes a displacement control valve and a pressure control valve. The outlets of electronically controlled pump 1 and electronically controlled pump 2 are respectively connected to the P1 and P2 ports of positive flow valve group 1 5. Pump 1 displacement control valve 11 is used to control the output flow of electronically controlled pump 1, and pump 1 pressure control valve 12 is used to limit the output pressure of electronically controlled pump 1. Pump 2 displacement control valve 21 is used to control the output flow of electronically controlled pump 2 2, and pump 2 pressure control valve 22 is used to limit the output pressure of electronically controlled pump 2 2; the outlets of electronically controlled pump 3 3 and electronically controlled pump 4 4 are respectively connected to the P3 and P4 ports of positive flow valve group 2 6. Pump 3 displacement control valve 31 is used to control the output flow of electronically controlled pump 3 3, and pump 3 pressure control valve 32 is used to limit the output pressure of electronically controlled pump 3 3. Pump 4 displacement control valve 41 is used to control the output flow of electronically controlled pump 4 4, and pump 4 pressure control valve 42 is used to limit the output pressure of electronically controlled pump 4 4. The positive flow valve group 15 includes a number of one-way valves, overflow valves, reversing valves and selection valves. The T1 and T2 ports of the positive flow valve group 15 are connected to the hydraulic oil tank, the A1 and B1 ports are connected to the top drive motor 7 and the A4 and B4 ports of the positive flow valve group 26, the A2 and B2 ports are connected to the top drive cylinder 8 and the A5 and B5 ports of the positive flow valve group 26, and the A3 and B3 ports are connected to the casing drive cylinder 9; the positive flow valve group 26 includes a number of one-way valves, overflow valves, reversing valves and selection valves. The T3 and T4 ports of the positive flow valve group 26 are connected to the hydraulic oil tank, the A4 and B4 ports are connected to the top drive motor 7 and the A1 and B1 ports of the positive flow valve group 15, the A5 and B5 ports are connected to the top drive cylinder 8 and the A2 and B2 ports of the positive flow valve group 5, and the A6 and B6 ports are connected to the casing drive motor 10.

[0021] like Figure 6As shown, the positive flow valve group 1 includes a first one-way valve 51, a first overflow valve 52, a sixth one-way valve 514, a first top drive rotation reversing valve 53, a top drive rotation selection valve 54, a fifth one-way valve 513, a first flow regeneration reversing valve 55, a first top drive lifting and releasing reversing valve 56, a second one-way valve 57, a first top drive lifting and releasing selection valve 511, a fourth one-way valve 512, a casing lifting and releasing reversing valve 58, a third one-way valve 59 and a casing lifting and releasing selection valve 510; the first one-way valve 514, a first overflow valve 52, a sixth one-way valve 514, a first top drive rotation reversing valve 53, a top drive rotation selection valve 54, a fifth one-way valve 513, a first flow regeneration reversing valve 55, a first top drive lifting and releasing reversing valve 56, a second one-way valve 57, a first top drive lifting and releasing selection valve 511, a fourth one-way valve 512, a casing lifting and releasing reversing valve 58, a third one-way valve 59 and a casing lifting and releasing selection valve 510; 1 is arranged between the P1 port and the first relief valve 52, the first relief valve 52 is arranged between the T1 port and the T2 port, the sixth check valve 514 is arranged between the P2 port and the first relief valve 52; the first top drive rotation reversing valve 53 is arranged between the T1 port and the T2 port, and the first top drive rotation reversing valve 53 is connected to the top drive motor through the A1 and B1 ports, the top drive rotation selection valve 54 is arranged between the P1 port and the first top drive rotation reversing valve 53, the fifth check valve 51 3 is arranged between the P2 port and the first top drive rotary reversing valve 53; the first top drive lifting and releasing reversing valve 56 is arranged between the T1 port and the T2 port, and the first top drive lifting and releasing reversing valve 56 is connected to the top drive oil cylinder through the A2 and B2 ports, one end of the first flow regeneration reversing valve 55 is connected to the T2 port, one end is connected to the B2 port through the fourth check valve 512, one end is directly connected to the B2 port, and the other end is connected to the first top drive lifting and releasing reversing valve 56, and the second check valve 57 is arranged between the P1 The casing lifting and releasing reversing valve 58 is arranged between the T1 port and the T2 port, and the casing lifting and releasing reversing valve 58 is connected to the casing driving cylinder through the A3 and B3 ports, the third one-way valve 59 is arranged between the P1 port and the casing lifting and releasing reversing valve 58, and the casing lifting and releasing selecting valve 510 is arranged between the P2 port and the casing lifting and releasing reversing valve 58.The first one-way valve 51 and the sixth one-way valve 514 prevent the high-pressure oil of the P1 and P2 ports from communicating with each other. The first overflow valve 52 limits the maximum pressure of the valve group and plays a safety role. The first top drive rotation reversing valve 53 is used to switch the rotation direction of the top drive motor 7. The top drive rotation selection valve 54 is used to select whether the high-pressure oil of the P1 port is supplied to the top drive motor 7. The fifth one-way valve 513 is used to prevent the oil from flowing in the opposite direction and plays the role of load holding and protecting the pump. The first top drive lifting and releasing reversing valve 56 is used to switch the running direction of the driving cylinder. The first top drive lifting and releasing selection valve 511 is used to select whether the high-pressure oil of the P2 port is supplied to the top drive cylinder 8. The second one-way valve 57 is used to prevent the oil from flowing in the opposite direction and plays the role of load holding and protecting the pump. The first flow regeneration reversing valve 55 is used to regenerate the flow and Auxiliary oil return, when the top drive cylinder 8 large chamber oil intake and small chamber oil return, the first flow regeneration reversing valve 55 works in the upper position, at this time the small chamber return oil enters the large chamber through the flow regeneration valve, increasing the cylinder extension speed, when the top drive cylinder 8 small chamber oil intake and large chamber oil return, the first flow regeneration reversing valve 55 works in the lower position, at this time the cylinder large chamber oil can return to the oil tank through the flow regeneration valve, reducing the return oil back pressure, reducing power loss; the fourth one-way valve 512 is used to prevent the top drive large chamber oil from flowing in reverse during flow regeneration; the casing lifting and releasing reversing valve 58 is used to switch the running direction of the casing drive cylinder 9, the third one-way valve 59 is used to prevent the oil from flowing in reverse, and plays the role of load holding and protecting the pump, and the casing lifting and releasing selection valve 510 is used to select whether the high-pressure oil at the P2 port is supplied to the casing drive cylinder 9.

[0022] like Figure 7As shown, the positive flow valve group 2 includes a seventh one-way valve 61, a second overflow valve 62, a thirteenth one-way valve 614, a second top drive rotation reversing valve 63, an eighth one-way valve 64, a twelfth one-way valve 613, a second flow regeneration reversing valve 65, a second top drive lifting and releasing reversing valve 66, a second top drive lifting and releasing selection valve 67, a tenth one-way valve 611, an eleventh one-way valve 612, a casing rotation reversing valve 68, a ninth one-way valve 69 and a casing rotation selection valve 610; the seventh one-way valve 61 is arranged at the P3 port and The second overflow valve 62 is arranged between the T3 port and the T4 port, and the thirteenth check valve 614 is arranged between the P4 port and the second overflow valve 62; the second top drive rotary reversing valve 63 is arranged between the T3 port and the T4 port, and the second top drive rotary reversing valve 63 is connected to the top drive motor and the A1 and B1 ports of the positive flow valve group 1 through the A4 and B4 ports, the eighth check valve 64 is arranged between the P3 port and the second top drive rotary reversing valve 63, and the twelfth check valve 613 is arranged between the P3 port and the second top drive rotary reversing valve 63. The second top drive lifting and releasing reversing valve 66 is arranged between the P4 port and the second top drive rotary reversing valve 63; the second top drive lifting and releasing reversing valve 66 is arranged between the T3 port and the T4 port, and the second top drive lifting and releasing reversing valve 66 is connected to the A2 and B2 ports of the top drive oil cylinder and the positive flow valve group 1 through the A5 and B5 ports, one end of the second flow regeneration reversing valve 65 is connected to the T4 port, one end is connected to the B5 port through the eleventh one-way valve 612, one end is directly connected to the B5 port, and the other end is connected to the second top drive lifting and releasing reversing valve 66, the second top drive lifting and releasing The selection valve 67 is arranged between the P3 port and the second top drive lifting and releasing reversing valve 66, and the tenth one-way valve 611 is arranged between the P4 port and the second top drive lifting and releasing reversing valve 66; the casing rotation reversing valve 68 is arranged between the T3 port and the T4 port, and the casing rotation reversing valve 68 is connected to the casing drive motor through the A6 and B6 ports, the ninth one-way valve 69 is arranged between the P3 port and the casing rotation reversing valve 68, and the casing rotation selection valve 610 is arranged between the P4 port and the casing rotation reversing valve 68.The seventh one-way valve 61 and the thirteenth one-way valve 614 prevent the high-pressure oil at the P3 and P4 ports from communicating with each other. The second overflow valve 62 limits the maximum pressure of the valve group and plays a safety role. The second top drive rotation reversing valve 63 is used to switch the rotation direction of the top drive motor 7. The eighth one-way valve 64 and the twelfth one-way valve are used to prevent the oil from flowing in reverse, and play a role in load holding and protecting the pump. The second top drive lifting and releasing reversing valve 66 is used to switch the running direction of the drive cylinder. The second top drive lifting and releasing selection valve 67 is used to select whether the high-pressure oil at the P3 port is supplied to the top drive cylinder 8. The tenth one-way valve 611 is used to prevent the oil from flowing in reverse, and plays a role in load holding and protecting the pump. The second flow regeneration reversing valve 65 is used to regenerate flow and assist in oil return. The top drive cylinder 8 is filled with oil in the large cavity. When the small cavity returns oil, the second flow regeneration reversing valve 65 works in the upper position. At this time, the return oil from the small cavity enters the large cavity through the flow regeneration valve, increasing the extension speed of the cylinder. When the top drive cylinder 8 enters the small cavity and returns oil to the large cavity, the second flow regeneration reversing valve 65 works in the lower position. At this time, the oil in the large cavity of the cylinder can return to the oil tank through the flow regeneration valve, reducing the return oil back pressure and reducing power loss; the eleventh one-way valve 612 is used to prevent the reverse flow of the oil in the large cavity of the top drive during flow regeneration; the casing rotation reversing valve 68 is used to switch the running direction of the casing drive motor 10, the ninth one-way valve 69 is used to prevent the oil from flowing in reverse, and plays the role of load holding and protecting the pump. The casing rotation selection valve 610 is used to select whether the high-pressure oil at the P4 port is supplied to the casing drive cylinder 9.

[0023] like Figure 8 As shown, the deep well drilling rig electric positive flow multi-mode control system adopts full electric control, positive flow control, and is mainly divided into five modes: normal mode, main lifting mode, main rotation mode, casing mode and tripping mode.

[0024] Normal mode: This mode includes two actions, rotation of the top drive motor 7 and extension and retraction of the top drive cylinder 8. When each action is operated separately, the four electronically controlled pump displacement control valves and pressure control valves obtain corresponding currents according to the handle signal, the corresponding reversing valves are synchronously reversed, and the corresponding selection valves are energized; when the two actions are combined, the electronically controlled pump 1 and the electronically controlled pump 2 supply oil to the top drive motor 7, the corresponding electronically controlled pump displacement control valves and pressure control valves obtain corresponding currents according to the top drive rotation handle signal, the positive flow valve group 1 5 top drive rotation reversing valve and the top drive rotation selection valve 54 are energized, the electronically controlled pump 3 3 and the electronically controlled pump 4 4 supply oil to the top drive cylinder 8, the corresponding electronically controlled pump displacement control valves and pressure control valves obtain corresponding currents according to the top drive lifting and releasing handle signal, and the positive flow valve group 2 6 top drive lifting and releasing reversing valve and the top drive lifting and releasing selection are energized.

[0025] Main lifting mode: This mode includes two actions, rotation of the top drive motor 7 and extension and retraction of the top drive cylinder 8. When each action is operated separately, the four electronically controlled pump displacement control valves and pressure control valves obtain corresponding currents according to the handle signal, the corresponding reversing valves are reversed synchronously, and the corresponding selection valves are energized; when the two actions are combined, the electronically controlled pump 2 supplies oil to the top drive motor 7, the corresponding electronically controlled pump displacement control valve and pressure control valve obtain corresponding currents according to the top drive rotation handle signal, the positive flow valve group 1 5 top drive rotation reversing valve is energized, and the top drive rotation selection valve 54 is not energized, the electronically controlled pump 1, the electronically controlled pump 3 3 and the electronically controlled pump 4 4 supply oil to the top drive cylinder 8, the corresponding electronically controlled pump displacement control valve and pressure control valve obtain corresponding currents according to the top drive lifting and releasing handle signal, the positive flow valve group 1 5 and the second top drive lifting and releasing reversing valve are energized, and the corresponding top drive lifting and releasing selection valve 511 is not energized and 67 is energized.

[0026] Main rotation mode: This mode includes two actions, rotation of the top drive motor 7 and extension and retraction of the top drive cylinder 8. When each action is operated separately, the four electronically controlled pump displacement control valves and pressure control valves obtain corresponding currents according to the handle signal, the corresponding reversing valves are synchronously reversed, and the corresponding selection valves are energized; when the two actions are combined, the electronically controlled pump 2, the electronically controlled pump 3 and the electronically controlled pump 4 supply oil to the top drive motor 7, and the corresponding electronically controlled pump displacement control valves and pressure control valves obtain corresponding currents according to the top drive rotation handle signal, the positive flow valve group 1 5 and the second top drive rotation reversing valve are energized, and the top drive rotation selection valve 54 is not energized, and the electronically controlled pump 1 supplies oil to the top drive cylinder 8, and the corresponding electronically controlled pump displacement control valves and pressure control valves obtain corresponding currents according to the top drive lifting and releasing handle signal, the positive flow valve group 1 5 top drive lifting and releasing reversing valve is energized, and the top drive lifting and releasing selection valve 511 is not energized.

[0027] Casing mode: This mode includes four actions: rotation of top drive motor 7, extension and retraction of top drive cylinder 8, rotation of casing drive motor 10 and extension and retraction of casing drive cylinder 9. When the top drive motor 7 rotates or the top drive cylinder 8 retracts and retracts independently, the four electronically controlled pump displacement control valves and pressure control valves obtain corresponding currents according to the handle signal, the corresponding reversing valves are synchronously reversed, and the corresponding selection valves are energized; when the casing drive motor 10 rotates independently, electronically controlled pump 3 3 and electronically controlled pump 4 4 supply oil to the action, the corresponding electronically controlled pump displacement control valves and pressure control valves obtain corresponding currents according to the casing rotation handle signal, and the positive flow valve group 2 6 casing rotation reversing valve 68 obtains The casing rotation selection valve 610 is energized; when the casing drive cylinder 9 is extended and retracted separately, the electronically controlled pump 1 and the electronically controlled pump 2 supply oil to the action, and the corresponding electronically controlled pump displacement control valve and pressure control valve obtain corresponding current according to the casing lifting and releasing handle signal, the positive flow valve group 15 casing lifting and releasing reversing valve 58 is energized, and the casing lifting and releasing selection valve 510 is energized; when the top drive motor 7 rotates and the top drive cylinder 8 is extended and retracted at the same time, one of the first three modes can be selected at the same time, and the oil supply method is determined according to the selected mode; when the casing drive motor 10 rotates and the casing drive cylinder 9 is extended and retracted at the same time, the electronically controlled pump 1 and the electronically controlled pump 2 supply oil to the casing drive cylinder 9 supplies oil, and the electronically controlled pump three 3 and the electronically controlled pump four 4 supply oil to the casing drive motor 10, which is the same as the control when acting alone; when the top drive cylinder 8 and the casing drive cylinder 9 act at the same time, the electronically controlled pump one 1 and the electronically controlled pump two 2 supply oil to the casing drive cylinder 9, and the corresponding electronically controlled pump displacement control valve and pressure control valve obtain corresponding current according to the signal of the casing lifting and releasing handle, the positive flow valve group one 5 casing lifting and releasing reversing valve 58 is energized, the casing lifting and releasing selection valve 510 is energized, the electronically controlled pump three 3 and the electronically controlled pump four 4 supply oil to the top drive cylinder 8, and the corresponding electronically controlled pump displacement control valve and pressure control valve obtain corresponding current according to the signal of the top drive lifting and releasing handle, and the positive flow valve group two 6 top drive The lifting and releasing reversing valve and the top drive lifting and releasing selection valve 67 are energized; when the top drive motor 7 and the casing drive motor 10 are in action at the same time, the electric control pump 1 and the electric control pump 2 2 supply oil to the top drive motor 7, and the corresponding electric control pump displacement control valve and pressure control valve obtain corresponding current according to the top drive rotation handle signal, the positive flow valve group 1 5 top drive rotation reversing valve and the top drive rotation selection valve 54 are energized, the electric control pump 3 3 and the electric control pump 4 4 supply oil to the casing drive motor 10, and the corresponding electric control pump displacement control valve and pressure control valve obtain corresponding current according to the casing rotation handle signal, the positive flow valve group 2 6 casing rotation reversing valve 68 is energized, and the casing rotation selection valve 610 is energized;When the four actions are in action at the same time, pump 1 supplies oil to the casing drive cylinder 9, and the corresponding electronically controlled pump displacement control valve and pressure control valve obtain corresponding current according to the signal of the casing lifting and releasing handle, the positive flow valve group 15 casing lifting and releasing reversing valve 58 is energized, and the casing lifting and releasing selection valve 510 is not energized. Pump 2 supplies oil to the top drive motor 7, and the corresponding electronically controlled pump displacement control valve and pressure control valve obtain corresponding current according to the signal of the top drive rotation handle, the positive flow valve group 15 top drive rotation reversing valve is energized, and the top drive rotation selection valve 5 4 is not powered, pump three supplies oil to the casing drive motor 10, the corresponding electric control pump displacement control valve and pressure control valve obtain corresponding current according to the casing rotation handle signal, positive flow valve group 2 6 casing rotation reversing valve 68 is powered, and casing rotation selection valve 610 is not powered, pump four supplies oil to the top drive cylinder 8, the corresponding electric control pump displacement control valve and pressure control valve obtain corresponding current according to the top drive lifting and releasing handle signal, positive flow valve group 2 6 top drive lifting and releasing reversing valve is powered, and top drive lifting and releasing selection valve 67 is not powered. ;

[0028] Drilling mode: In this mode, the top drive can be quickly lifted and lowered. When this mode is turned on, when the top drive cylinder 8 is extended, the corresponding positive flow valve group flow regeneration valve is energized, and the return oil flow from the small cavity of the top drive cylinder 8 is regenerated into the large cavity, and the extension speed is further improved. When the top drive cylinder 8 is retracted, the corresponding positive flow valve group flow regeneration valve is energized, and the oil in the large cavity of the cylinder can be returned through the top drive lifting and releasing reversing valve and the flow regeneration valve at the same time, thereby reducing the return oil back pressure and reducing energy loss.

[0029] Among them, in the casing mode, the conventional mode, the main lifting mode or the main rotation mode can be opened synchronously; the drilling mode can be opened simultaneously with other modes.

[0030] In any mode, the supply flow and maximum pressure of the currently executed action can be adjusted steplessly.

[0031] Functional description: Electronically controlled pump: The electronically controlled pump displacement control valve controls the pump output flow according to the electric proportional handle signal, and the electronically controlled pump pressure control valve limits the pump pressure according to the set value or the electric proportional knob signal.

[0032] Positive flow valve: The reversing valve switches the direction of action, the selection valve selects the oil supply pump by switching the valve core, the one-way valve prevents the oil from flowing in reverse or replenishing, and the overflow valve is used to protect the system from overpressure.

[0033] The deep well drilling rig electrically controlled positive flow multi-mode control system provided by the present invention can be used for drilling rig equipment such as deep well drilling rigs.

[0034] Embodiment 2: The embodiment of the present invention further provides a drilling rig, comprising the deep well drilling rig electronically controlled positive flow multi-mode control system described in any one of Embodiment 1.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A deep well drilling rig electric positive flow multi-mode control system, characterized in that: include: The electronically controlled pump assembly includes electronically controlled pump 1, electronically controlled pump 2, electronically controlled pump 3 and electronically controlled pump 4, each electronically controlled pump includes a displacement control valve and a pressure control valve, the outlets of electronically controlled pump 1 and electronically controlled pump 2 are respectively connected to the P1 and P2 ports of the positive flow valve group 1, and the outlets of electronically controlled pump 3 and electronically controlled pump 4 are respectively connected to the P3 and P4 ports of the positive flow valve group 2; Positive flow valve group 1 and positive flow valve group 2, each of which comprises a plurality of one-way valves, overflow valves, reversing valves and selection valves, and the positive flow valve group 1 and positive flow valve group 2 are connected to different actuators through the plurality of one-way valves, overflow valves, reversing valves and selection valves, wherein the one-way valve is used to prevent the reverse flow of oil, the overflow valve is used to limit the maximum pressure of the valve group, the reversing valve is used to switch the flow direction of oil, and the selection valve is used to select whether to supply high-pressure oil to different actuators; The control system is used to control the displacement control valve and pressure control valve of each electronically controlled pump in the electronically controlled pump assembly, as well as the reversing valve and selection valve in the positive flow valve group 1 and the positive flow valve group 2, so as to realize full electronically controlled positive flow multi-mode control.

2. The deep well drilling rig electric positive flow multi-mode control system according to claim 1 is characterized in that: The actuator includes a top drive motor, a top drive cylinder, a casing drive cylinder and a casing drive motor, the positive flow valve group 1 includes ports T1 and T2, ports A1 and B1, ports A2 and B2, and ports A3 and B3, and the positive flow valve group 2 includes ports T3 and T4, ports A4 and B4, ports A5 and B5, and ports A6 and B6, wherein: The T1 and T2 ports are connected to the hydraulic oil tank, the A1 and B1 ports are connected to the top drive motor, the A2 and B2 ports are connected to the top drive cylinder, and the A3 and B3 ports are connected to the casing drive cylinder; The T3 and T4 ports are connected to the hydraulic oil tank, the A4 and B4 ports are connected to the A1 and B1 ports of the top drive motor and the positive flow valve group, the A5 and B5 ports are connected to the A2 and B2 ports of the top drive cylinder and the positive flow valve group, and the A6 and B6 ports are connected to the casing drive motor.

3. The deep well drilling rig electric positive flow multi-mode control system according to claim 1, characterized in that: The positive flow valve group 1 includes a first one-way valve 51, a first relief valve 52, a sixth one-way valve 514, a first top drive rotation reversing valve 53, a top drive rotation selection valve 54, a fifth one-way valve 513, a first flow regeneration reversing valve 55, a first top drive lifting and releasing reversing valve 56, a second one-way valve 57, a first top drive lifting and releasing selection valve 511, a fourth one-way valve 512, a casing lifting and releasing reversing valve 58, a third one-way valve 59 and a casing lifting and releasing selection valve 510; The first one-way valve 51 is arranged between the P1 port and the first overflow valve 52 , the first overflow valve 52 is arranged between the T1 port and the T2 port, and the sixth one-way valve 514 is arranged between the P2 port and the first overflow valve 52 ; The first top drive rotation reversing valve 53 is arranged between the T1 port and the T2 port, and the first top drive rotation reversing valve 53 is connected to the top drive motor through the A1 port and the B1 port, the top drive rotation selection valve 54 is arranged between the P1 port and the first top drive rotation reversing valve 53, and the fifth check valve 513 is arranged between the P2 port and the first top drive rotation reversing valve 53; The first top drive lifting and releasing reversing valve 56 is arranged between the T1 port and the T2 port, and the first top drive lifting and releasing reversing valve 56 is connected to the top drive oil cylinder through the A2 port and the B2 port. One end of the first flow regeneration reversing valve 55 is connected to the T2 port, one end is connected to the B2 port through the fourth one-way valve 512, one end is directly connected to the B2 port, and the other end is connected to the first top drive lifting and releasing reversing valve 56. The second one-way valve 57 is arranged between the P1 port and the first top drive lifting and releasing reversing valve 56. The first top drive lifting and releasing selection valve 511 is arranged between the P2 port and the first top drive lifting and releasing reversing valve 56. The casing lifting and releasing reversing valve 58 is arranged between the T1 port and the T2 port, and the casing lifting and releasing reversing valve 58 is connected to the casing driving cylinder through the A3 and B3 ports. The third one-way valve 59 is arranged between the P1 port and the casing lifting and releasing reversing valve 58. The casing lifting and releasing selection valve 510 is arranged between the P2 port and the casing lifting and releasing reversing valve 58.

4. The deep well drilling rig electric positive flow multi-mode control system according to claim 1, characterized in that: The positive flow valve group 2 includes a seventh one-way valve 61, a second overflow valve 62, a thirteenth one-way valve 614, a second top drive rotation reversing valve 63, an eighth one-way valve 64, a twelfth one-way valve 613, a second flow regeneration reversing valve 65, a second top drive lifting and releasing reversing valve 66, a second top drive lifting and releasing selection valve 67, a tenth one-way valve 611, an eleventh one-way valve 612, a casing rotation reversing valve 68, a ninth one-way valve 69 and a casing rotation selection valve 610; The seventh one-way valve 61 is arranged between the P3 port and the second relief valve 62, the second relief valve 62 is arranged between the T3 port and the T4 port, and the thirteenth one-way valve 614 is arranged between the P4 port and the second relief valve 62; The second top drive rotary reversing valve 63 is arranged between the T3 port and the T4 port, and the second top drive rotary reversing valve 63 is connected to the top drive motor and the A1 and B1 ports of the positive flow valve group 1 through the A4 and B4 ports, the eighth check valve 64 is arranged between the P3 port and the second top drive rotary reversing valve 63, and the twelfth check valve 613 is arranged between the P4 port and the second top drive rotary reversing valve 63; The second top drive lifting and releasing reversing valve 66 is arranged between the T3 port and the T4 port, and the second top drive lifting and releasing reversing valve 66 is connected to the A2 and B2 ports of the top drive oil cylinder and the positive flow valve group 1 through the A5 and B5 ports, one end of the second flow regeneration reversing valve 65 is connected to the T4 port, one end is connected to the B5 port through the eleventh one-way valve 612, one end is directly connected to the B5 port, and the other end is connected to the second top drive lifting and releasing reversing valve 66, the second top drive lifting and releasing selection valve 67 is arranged between the P3 port and the second top drive lifting and releasing reversing valve 66, and the tenth one-way valve 611 is arranged between the P4 port and the second top drive lifting and releasing reversing valve 66; The sleeve rotation reversing valve 68 is arranged between the T3 port and the T4 port, and the sleeve rotation reversing valve 68 is connected to the sleeve driving motor through the A6 and B6 ports. The ninth one-way valve 69 is arranged between the P3 port and the sleeve rotation reversing valve 68. The sleeve rotation selection valve 610 is arranged between the P4 port and the sleeve rotation reversing valve 68.

5. The deep well drilling rig electric positive flow multi-mode control system according to claim 1, characterized in that: The control system includes five operation modes: normal mode, main lifting mode, main rotation mode and casing mode; In normal mode, the rotation of the top drive motor and the extension and retraction of the top drive cylinder are independently or compound controlled by the electronically controlled pump according to the signal from the operating handle; In the main lifting mode, according to the signal of the operating handle, the telescopic action of the top drive cylinder is controlled by the electronically controlled pump first, while the rotation action of the top drive motor is allowed; In the main rotation mode, the top drive motor's rotation is preferentially controlled by the electronically controlled pump, while the top drive cylinder's extension and retraction are allowed; In casing mode, the rotation of the top drive motor, the extension and retraction of the top drive cylinder, the rotation of the casing drive motor and the extension and retraction of the casing drive cylinder are simultaneously controlled by the electronically controlled pump, and these actions can be performed individually or in combination.

6. The deep well drilling rig electric positive flow multi-mode control system according to claim 1, characterized in that: The system also includes a tripping mode, in which the extension and retraction speeds of the top drive cylinder are increased by the first flow regeneration reversing valve and the second flow regeneration reversing valve.

7. The deep well drilling rig electric positive flow multi-mode control system according to claim 1, characterized in that: In the casing mode, at least one of the conventional mode, the main lifting mode or the main rotation mode can be opened synchronously.

8. The deep well drilling rig electric positive flow multi-mode control system according to claim 6, characterized in that: The Tripping mode can be turned on at the same time as any other mode.

9. The deep well drilling rig electric positive flow multi-mode control system according to claim 1, characterized in that: In any mode, the system allows stepless adjustment of the flow rate and maximum pressure supplied for the action currently being performed.

10. A drilling rig, comprising the deep well drilling rig electrically controlled positive flow multi-mode control system according to any one of claims 1 to 9.

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