Intelligent monitoring method aiming at well drilling overflowing and leakage

An intelligent monitoring and drilling technology, applied in wellbore/well components, earthwork drilling, flushing wellbore, etc., can solve the comprehensive utilization of sensor information and the lack of in-depth accident judgment, and the lack of comprehensive utilization of sensor methods and accident judgment, etc. problems, to achieve stable automatic monitoring work, low possibility of false alarms, and timely accident alarms

Inactive Publication Date: 2010-06-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, such monitoring technology only pays attention to the monitoring object and the selection of monitoring equipment, but the research on the comprehensive utilization of sensor information and accident judgment is not deep enough. For example, the Chinese patent No. 200610112449. In the "method", th

Method used

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  • Intelligent monitoring method aiming at well drilling overflowing and leakage
  • Intelligent monitoring method aiming at well drilling overflowing and leakage
  • Intelligent monitoring method aiming at well drilling overflowing and leakage

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Embodiment

[0031] An intelligent monitoring method for drilling overflow and lost circulation, figure 1 It is a block diagram of hardware equipment of the monitoring system corresponding to this method, wherein sensor 1, sensor 2 and sensor 3 respectively correspond to radar level gauge, pressure sensor and acoustic wave sensor.

[0032] Field equipment includes three liquid level sensors installed at the wellhead: (1) radar level gauge, used to monitor the liquid level during normal drilling and fluid flow; (2) pressure sensor, used to monitor the liquid level during tripping ; (3) Acoustic sensor, used to monitor the liquid level after lost circulation occurs. Among them, the radar level gauge is responsible for monitoring the depth from 0 meter to 1 meter from the liquid flow port, the pressure sensor monitors the depth from 1 meter to 8 meters from the liquid flow port, and the acoustic wave sensor monitors the depth greater than 8 meters from the liquid flow port.

[0033] The main...

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Abstract

The invention discloses an intelligent monitoring method aiming at well drilling overflowing and leakage, belonging to the well drilling monitoring technology. On the basis of the existing hardware device, the method comprehensively utilizes the information of a plurality of site sensors, imitates the experience of experts to put forward the reasonable judgment of accidents such as overflowing, leakage and the like as well as the regulation of alarm control, and realizes automatic monitoring and alarm control by a computer. By using the method, the capability of treating multiple information of the computer can be fully exerted, automatic monitoring wok can be realized under the unsupervised condition, leads the alarm of accidents to be more timely and accurate, reduces the probability offalse alarm, and well solves the problems in oil field well drilling production.

Description

technical field [0001] The invention relates to an automatic monitoring method for overflow and lost circulation accidents in the drilling process, and belongs to the technical field of drilling monitoring. Background technique [0002] In the process of oil drilling, overflow and lost circulation are frequent accidents. When the formation pore pressure is greater than the bottom hole pressure, the liquid in the formation pores will soak into the well, causing the liquid level of the mud pool to rise and cause overflow; if there is a leakage channel and a certain accommodation space in the formation, or the wellbore fluid column pressure is greater than the formation pore pressure , leakage will occur. The occurrence of overflow and lost circulation will bring great economic losses to drilling operations, and it is very easy to cause accidents and casualties. [0003] In order to reduce the losses caused by overflow and lost circulation, the existing solutions are mainly t...

Claims

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Application Information

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IPC IPC(8): E21B21/08
Inventor 赵清杰许伟村石小明
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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