A dynamic control system and method for adaptive downhole drilling tool face
A tool face and drilling tool technology, which is applied to the automatic control system of drilling, drilling equipment, earth-moving drilling, etc., can solve the problems of effective control of the tool face and wellbore trajectory of difficult drilling tools, affecting the drilling progress, and increasing the drilling cost. , to achieve simple and fast measurement or estimation, improve drilling efficiency, and reduce accuracy requirements
Active Publication Date: 2018-02-13
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
Obviously, this method will affect the drilling schedule, reduce work efficiency, and increase drilling costs
In addition, in the conventional sliding steerable drilling process, because the drill string of the sliding steerable drilling system does not rotate, it is easy to generate a large frictional torque
For the wellbore with clear formation conditions, the frictional torque can be overcome by rotating the top drive according to the well depth and the combination characteristics of the drilling tool; but for the large slenderness ratio flexible drill string system, it is difficult to control the tool face and the wellbore trajectory. achieve effective control
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[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0037] Such as figure 1 As shown, the dynamic control system of the present invention includes a data acquisition module 101, a user input module 102, a multibody dynamics modeling module 103, an adaptive model correction module 104, a tool face estimation module 105, a control law generation module 106, and a control information An output module 107 , an execution module 108 , a dangerous state judging module 109 , a measurement information output module 110 and a system output module 111 .
[0038] Among them, the data collection module 101 transmits the collected working state measurement information of the drilling system to the multibody dynamics modeling module 103, the adaptive model correction module 104, the control law generation module 106, the dangerous state judgment module 109 and the measurement information output module. 110. In this...
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A dynamic control system and method for an adaptive downhole drilling tool face, the dynamic control system includes a data acquisition module, a control strategy input module, a drilling model information input module, a multi-body dynamics modeling module, an adaptive model correction module, Tool surface estimation module, control law generation module, execution module and dangerous state judgment module. The user inputs the control strategy and drilling model, the data acquisition module collects the drilling conditions of the system, the multi-body dynamics modeling module performs multi-body dynamics modeling based on the drilling model, and the adaptive model correction module corrects the multi-body dynamics model based on the drilling conditions , the tool face estimation module and the control law generation module calculate the control law of the control actuator based on the control strategy, drilling situation and the revised multi-body dynamic model; the dangerous state judgment module sends an alarm when the system is in a dangerous state. The invention can be widely used in the real-time and dynamic control of the tool face of the power drilling tool during downhole directional drilling.
Description
technical field [0001] The invention relates to a control system and method of an oil and gas field downhole drilling tool, in particular to a dynamic control system and method for an adaptive downhole drilling tool face based on a multi-body dynamics model. Background technique [0002] Sliding drilling using angled drilling tools is a commonly used drilling method in petroleum directional drilling. Due to changes in formation lithology, changes in mud pump speed, wear of drill bits and power drilling tools, etc., the tool face of downhole drilling tools is prone to drift, which will cause the wellbore trajectory to deviate from the designed trajectory. When the ground engineer finds that the tool face of the drilling tool drifts, the conventional treatment method is to immediately stop the drilling and lift the drilling tool, adjust the tool face of the drilling tool to the required position, and then go down and continue drilling. Obviously, this method will affect the d...
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IPC IPC(8): E21B44/00
Inventor 张凤久周建良程载斌何保生曹砚锋李汉兴武广瑷李峰飞
Owner CHINA NAT OFFSHORE OIL CORP