Underground liquid level monitoring system and its method

A liquid level monitoring and liquid level technology, which is applied in earthwork drilling, wellbore flushing, wellbore/well components, etc., can solve the problems of insensitive monitoring of well kick and lost circulation accidents, slow change of mud filling level, and poor response Long time and other issues

Active Publication Date: 2007-02-07
北京德美高科科技股份有限公司
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AI Technical Summary

Problems solved by technology

This method of monitoring the liquid level of the mud tank has great disadvantages: First, the mud must flow from the wellhead through the overflow prevention pipe through the vibrating screen, and then flow back to the mud tank through the mud tank, so that the response required for monitoring well kick and lost circulation The time is long; secondly, due to the large volume of the mud tank, after a well kick or a well loss occurs, the mud filling level changes slowly, and the well kick and well loss accidents cannot be monitored sensitively

Method used

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  • Underground liquid level monitoring system and its method
  • Underground liquid level monitoring system and its method
  • Underground liquid level monitoring system and its method

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[0016] The components in the accompanying drawings are represented by the following reference signs: (1) well sealing device; (2) four-way internal and external valves; (3) casing head valves; (4) differential pressure liquid level gauge; (5) industrial control computer (6) loudspeaker; (7) mud pump; (8) mud tank; (9) shaft; (10) grouting pump; (11) cable; (12) mud water supply pipeline; (13) anti-overflow pipe; ( 14) pipeline; (15) sonar device; (16) radar liquid level gauge; (17) clamp-on flowmeter; (18) drill pipe; (19) drill pipe joint, (20) mud level in the well.

[0017] Such as figure 1 The monitoring method of the shown downhole liquid level monitoring system of the present invention is:

[0018] During the normal drilling / mud circulation process of the drilling rig, the liquid level in the wellbore is at the outlet of the overflow prevention pipe. At this time, the liquid level is monitored by the radar liquid level gauge (16) and the clamp-on flowmeter (17); the cla...

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Abstract

The invention relates to a under-well level detecting system and relative detecting method, wherein said system comprises: a radar level machine, a liquid difference machine and a sonar, while their liquid level measured data are transmitted to the control computer inside the well room, to control the pour pump, to measure and control the under-well liquid level. The invention can real-time detect the liquid level in each process, at right position.

Description

technical field [0001] The invention relates to a monitoring system used in drilling operations, in particular to a downhole liquid level monitoring system and a monitoring method thereof. Background technique [0002] In the process of oil drilling and workover, well kick and lost circulation are frequent accidents, which bring huge loss of personnel and financial resources to the oil industry. At present, the mud level is mainly monitored in the ground mud tank in China. An increase in the mud level in the mud tank indicates a well kick, and a decrease in the mud level indicates a well loss. This method of monitoring the liquid level of the mud tank has great disadvantages: First, the mud must flow from the wellhead through the overflow prevention pipe through the vibrating screen, and then flow back to the mud tank through the mud tank, so that the response required for monitoring well kick and lost circulation The time is long; secondly, due to the large volume of the m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/04E21B21/08
Inventor 余代美
Owner 北京德美高科科技股份有限公司
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