Method for adjusting thrust of hydraulic devices in real time
A technology of hydraulic device and real-time adjustment, applied in the field of hydraulic device, to achieve the effect of constant size and direction
Pending Publication Date: 2021-03-26
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology
[0004]
At present, there is no relevant technology that can ensure the magnitude and direction of the lateral force of the drill bit to be constant
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[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0046] figure 1 It is a schematic diagram of thrust distribution of a hydraulic device of the present invention. Such as figure 1 As shown, the first hydraulic device 1 , the second hydraulic device 2 and the third hydraulic device 3 are distributed on the rotary steering system 4 , they are on a p...
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The invention provides a method for adjusting thrust of hydraulic devices in real time. The method comprises the steps that S1, a coordinate system is established, and the y-axis direction is made tobe the same as the thrust F1 direction of the first hydraulic device; S2, the thrust F1 of the first hydraulic device, the thrust F2 of the second hydraulic device and the thrust F3 of the third hydraulic device are synthesized in the coordinate system, and synthesized resultant force sigma F is obtained; S3, a thrust coefficient K is obtained based on the synthesized resultant force sigma F and expected lateral resultant force F of a drill bit; S4, an initialized thrust value f0 is obtained based on the maximum value and the minimum value of the hydraulic devices; and S5, the thrust F1 of thefirst hydraulic device, the thrust F2 of the second hydraulic device and the thrust F3 of the third hydraulic device are obtained based on the expected lateral resultant force F of the drill bit, theincluded angle delta between the expected lateral resultant force F of the drill bit and the thrust F1 of the first hydraulic device, the initialized thrust value f0 and the thrust coefficient K. According to the method, the thrust of the three hydraulic devices can be adjusted in real time according to the positions, relative to the gravity high side, of the three hydraulic devices, and therefore the magnitude and direction of the lateral force of the drill bit are constant.
Description
technical field [0001] The invention relates to the technical field of hydraulic devices, in particular to a method for real-time adjusting thrust of a hydraulic device. Background technique [0002] The working principle of the push-on rotary steerable system is to adjust the thrust of the hydraulic device on the drilling instrument, so as to provide lateral force to the drill bit, and then control the wellbore trajectory. [0003] In the existing rotary steerable system, three hydraulic devices are distributed on the rotary steerable system at intervals of 120° on a plane. During the drilling process of the rotary steerable system, since the position of the three hydraulic devices relative to the high side of gravity is changing, it is necessary to adjust the thrust of the three hydraulic devices in real time so that the drill bit can get a force of constant magnitude and direction, so as to control the drill bit to the set position. direction to drill. [0004] At prese...
Claims
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Login to View More IPC IPC(8): E21B7/04
CPCE21B7/04
Inventor 杨斌刘焕雨白璟张德军唐雅琴孙炳章刘伟温杰文马慧斌焦刚岳步江李玮燕
Owner BC P INC CHINA NAT PETROLEUM CORP