Multi-body dynamic quick analysis modeling method for rotary steering drilling system

A technology of rotary steerable drilling and multi-body dynamics, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as long research and development cycle, high research and development costs, and difficulties in predicting and controlling mechanical properties of wellbore trajectories.

Active Publication Date: 2011-05-18
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

[0005] At present, the development of rotary steerable tools in my country still adopts the traditional design method, that is, the cycle of product design-prototype development-test-modification design-prototype manufacture-test, each link is accompanied by the design, manufacture and test of the physical prototype , long

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  • Multi-body dynamic quick analysis modeling method for rotary steering drilling system
  • Multi-body dynamic quick analysis modeling method for rotary steering drilling system
  • Multi-body dynamic quick analysis modeling method for rotary steering drilling system

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] like figure 1 As shown, the present invention uses the theory and method of multi-body dynamics to establish an accurate mechanical model of the rotary steerable drilling system. Steering performance of the rotary steerable drilling system when drilling parameters, different drilling combinations, drill bit types and steering tool working parameters, so as to optimize the design of the lower drilling tool combination, predict and control the wellbore trajectory in real time. The steps are as follows:

[0034] 1) According to the structural information of the drilling system, the mechanical model of the structural unit is established, which mainly includes the following parts:

[0035] (1) Top drive unit 1: Coupling the motion equation of the motor into the mechanical model of the drilling system;

[0036] (2) Drill pipe unit: the dynamic equ...

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Abstract

The invention relates to a multi-body dynamic quick analysis modeling method for a rotary steering drilling system. The method comprises the following steps of: (1) establishing a structural unit mechanical model according to structural information of the drilling system; (2) establishing constraint models which comprises a speed constraint model, an angular velocity constraint model, a rigid body-beam clamped constraint model and a beam-beam clamped constraint model; (3) establishing an acting force model; (4) establishing a drilling system parameterized model; and (5) importing a computation model file into a multi-body dynamic simulation program to perform dynamic analysis of the drilling system so as to finish modeling. Since the mechanical model of the drilling system is established on the basis of a multi-body dynamic basic principle, rotary motion and dynamic analysis of rotary steering whole well drill string system are realized, and a well bore path is dynamically predicted. The method can be widely applied to the fields of oil-gas fields and coal bed methane exploitation.

Description

technical field [0001] The invention relates to a modeling method, in particular to a multi-body dynamics rapid analysis modeling method of a rotary steerable drilling system. Background technique [0002] In directional drilling, rotary steerable technology has significant advantages over other directional control technologies. The Rotary Steerable System (RSS: Rotary Steerable System) completely abandons the traditional slide-steering method, and automatically, continuously and flexibly adjusts the well deviation and azimuth while the drill string is rotating, which greatly improves the drilling speed and safety. Trajectory control has high precision, which is a guiding method to meet the development needs of closed-loop automatic drilling. RSS has yielded benefits in many field applications worldwide, however the surface driven and steerable driven approach of RSS has also resulted in increased drilling problems. The use of RSS has brought about a major problem, that is...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 蒋世全程载斌任革学周建良何保生杨蔡进李汉兴管楠祥
Owner CHINA NAT OFFSHORE OIL CORP
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