Drill stem connector automatic screwing control device and method
A technology of drill pipe joints and control devices, which is applied in the direction of automatic drilling control systems, fluid pressure actuators, drill pipes, etc., and can solve problems such as increased contact pressure on threaded meshing surfaces, excessive spinner torque, thread wear, etc. , to achieve the effect of reducing the friction of the turnbuckle, avoiding thread damage and reducing labor intensity
Active Publication Date: 2011-04-20
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0006] (2) Axial load control: The upward force generated by the high-pressure drilling fluid in the cavity causes the thread of the drill pipe joint to bear a large axial load, which causes the contact pressure on the thread mating surface to increase suddenly, causing too high Spinning torque, even lead to thread wear, sticking to failure, etc.
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Embodiment 1
[0043] Embodiment 1: Taking an automatic twisting control device for a drill pipe joint as an example, the present invention will be further described in detail.
[0044] refer to figure 1 . The drill pipe joint automatic spinner control device mainly consists of a constant pressure pump 1, four spinner motors 8, four balance compensation cylinders 20, a proportional reversing valve 4, a pressure compensator 5, an electromagnetic reversing valve 12, It consists of three proportional pressure reducing valves, two hydraulically controlled one-way valves, one two-way throttling / one-way valve 14, seven pressure sensors, one displacement sensor 21, one rotational speed sensor 9 and a fuel tank 22.
[0045] The model of constant pressure pump 1: JRR075CP; the model of rotary buckle motor 8: TG0280; the model of balance compensation cylinder 20: WYX01140L-1FY; the model of proportional reversing valve 4: DPZA-A-273-S3; Model: JPC-211 / 30; model of electromagnetic reversing valve 12:...
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The invention discloses a drill stem connector automatic screwing control device, which is used for automatically screwing a drill stem connector of a continuous and circulating drilling system for drilling. A constant-pressure pump is connected with a proportional pressure relief valve a and an electromagnetic directional valve; a pressure compensator is connected with the proportional pressure relief valve a and a screwing motor; the electromagnetic directional valve is connected with a hydraulic control one-way valve a and a hydraulic control one-way valve b; a double throttle / one-way valve is connected with a proportional pressure relief valve b, a proportional pressure relief valve c, the hydraulic control one-way valve a and the hydraulic control one-way valve b; and a pressure sensor a is connected with the proportional pressure relief valve a, the screwing motor, the proportional pressure relief valve b, the proportional pressure relief valve c and a balance compensation oil cylinder. The device has the advantages of eliminating motion interference and adverse effect of ejecting force of drilling fluid on the screwing control of a drill rod connector and avoiding screw damage in screwing by controlling the screwing motor and the balance compensation oil cylinder.
Description
technical field [0001] The invention relates to the field of drilling equipment in the petroleum industry, in particular to a control device and a control method for realizing automatic screwing of drill pipe joints in a continuous circulation drilling system. Background technique [0002] At present, the continuous circulation drilling system is an advanced drilling technology and equipment, which can maintain the continuous circulation of the drilling fluid during the single root connection, so as to achieve a stable equivalent circulation density and uninterrupted discharge of cuttings during the entire drilling period, avoiding Bottomhole pressure fluctuations caused by pump stop and pump cycle are eliminated, wellbore conditions and drilling safety are comprehensively improved, drilling accidents are greatly reduced, and the total ROP is increased. [0003] The automatic spinner control of drill pipe joint is one of the core technologies of the continuous circulation dr...
Claims
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IPC IPC(8): E21B44/00E21B19/18F15B15/18
Inventor 马青芳胡志坚王爱国肖建秋邵强
Owner BC P INC CHINA NAT PETROLEUM CORP