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Method for accurately measuring depth in through bit logging

A well logging and depth technology, applied in the directions of measurement, earthwork drilling, borehole/well components, etc., can solve problems such as complex procedures, low measurement efficiency and accuracy, and many depth measurement parameters, so as to achieve high measurement efficiency and excellent results. Accurate, easy-to-operate results

Active Publication Date: 2013-03-20
吉辰智能设备集团有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to propose an electromagnetic wave transmission method for well logging instrument information, a method for accurately measuring depth in drilling, logging, and drilling, logging, and drilling. The problem of low efficiency and accuracy

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Embodiment Construction

[0015] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0016] The method of accurately measuring the depth in well logging through the drill bit. During logging operations, the actions of lowering the drill pipe are: the elevator puts the drill pipe, lifts the drill pipe and pulls it to the wellhead drill pipe, makes up the hydraulic tongs, and lowers the drill pipe. Rod, put slips, release elevator and finally lift elevator, install speed sensor on hydraulic tongs and elevator to monitor the vibration of the two tools, when the vibration changes suddenly, the elevator will hold the drill pipe and buckle up , start to calculate the hook displacement after the hydraulic tongs are buckled up, until the elevator is released, this distance is the depth of going down the well.

[0017] like figure 1 , figure 2 As shown, h is the gap between the two small ...

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Abstract

The invention relates to a method for accurately measuring depth in through bit logging. During logging, a drill pipe is sequentially run by the following steps of running the drill pipe by an elevator, lifting and pulling the drill pipe to the drill pipe position at a wellhead, making up by a pair of hydraulic tongs, running the drill pipe, setting a slip, releasing the elevator, and finally lifting the elevator. The hydraulic tongs and the elevator are respectively provided with a sensor, and the sensors are used for monitoring the shakes of the hydraulic tongs and the elevator. When the shakes suddenly change, the elevator clamps the drill pipe and then makes up the drill pipe, the displacement of a large hook is calculated after the elevator completes making up until the elevator is released, and the distance is the logging depth. Grains of a logging large rope are detected by an optical pulse transmitter and an optical pulse receiver, a subsequently measured optical signal is converted into a pulse signal, the obtained pulse codes are identified, then the displacement value of the large hook in the process from the making-up of the hydraulic tongs to the releasing of the elevator is obtained, and further the displacement value of the logging depth is obtained. The method has the advantages that the operation is simple, the measuring efficiency is high, and the results are more accurate.

Description

technical field [0001] The invention relates to the technical field of well logging, in particular to a method for accurately measuring depth in well logging through a drill bit. Background technique [0002] With the continuous development of logging technology, new methods and new instruments have been gradually popularized and applied. In recent years, through-drilling logging technology has matured, and through-bit logging technology has basically replaced ordinary logging and logging while drilling, and has become a common technical means for logging operations. [0003] In the process of drilling, mud logging, and logging through the drill bit, accurate depth measurement is required. Without accurate depth, the measurement of downhole instruments is meaningless. The traditional depth measurement needs to measure the depth by measuring multiple factors such as the diameter of the large rope, the number of turns of the large rope on the drum, the diameter of the drum, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/04
Inventor 黄文帜高怀雪苏航
Owner 吉辰智能设备集团有限公司
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