Drilling leakage zone position recognition system

Abstract

The invention provides a drilling leakage zone position recognition system, which can be used for judging the accurate leakage occurring position. An externally embedded measuring pup joint is used; by measuring three parameters of the pressure, the flow rate and the temperature of an annular space, the drilling fluid leakage occurring position is measured and comprehensively analyzed, so that theleakage zone position is accurately obtained; and through a radio frequency technology, stored data is fast read. The instrument is arranged in a position near a drilling bit in a pup joint form; theleakage parameters are recorded and stored; then, a radio frequency tag is used for reading the data; and the read data are processed and analyzed on the ground. The technology has small influence onthe drilling construction; and the well control risk is favorably reduced.

Description

technical field [0001] The invention relates to an instrument for petroleum drilling, in particular to an instrument for measuring leakage layers. Background technique [0002] During oil and gas drilling, lost circulation is usually a complex and thorny problem. After the leakage occurs, it is necessary to accurately determine the location of the leakage layer as soon as possible, so as to take effective plugging measures in time and ensure the normal drilling. my country began to develop leakage measurement instruments in the 1970s. Most of these instruments were developed with the help of the principle of fluid dynamics. It either converts the fluid flow when the leakage occurs into the displacement of the diaphragm for measurement, or uses the turbine flowmeter to measure Principle for flow measurement. Only in recent years has the technology of using multiple methods to complement each other to measure the missing position, and the accuracy has been greatly improved. ...

AI Technical Summary

Problems solved by technology

However, there are still some problems in these methods. For example, the cable or drill pipe is used to measure after lost circulation, which has certain risks. For example, the collapse of the well wall can easily cause pipe sticking accidents, and the construction is also relatively complicated; It is necessary to perform tripping operations after leakage occurs, and then run into the instrument for measurement

This not only increases the risk of well control, but also makes the construction complicated and cumbersome

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