Adaptive intelligent well depth measurement device and measurement method

Abstract

The invention provides a self-adaptable type intelligent well depth measurement device and method. The device comprises a well-logging probe (101), a wire rope (108), a first pulley (104), a second pulley (105), a third pulley (107), a support (102), an incremental type photoelectric rotational encoder (103), a tension sensor (106), an electric wire rope winch (109) and a well depth measurement device controller (110). The self-adaptable type intelligent well depth measurement device and method have the following advantages that the device and method are used for measuring the depth of the well-logging probe under a well in real time in the processes of exploration, well logging and the like, and the advantages of good real-time performance, high measurement precision, high measurement efficiency, high measurement resolution ratio, self-adaptable measurement, intelligent measurement, flexible use and the like are achieved.

Description

technical field [0001] The invention relates to a well depth measuring device, in particular to an adaptive intelligent well depth measuring device and a measuring method. Background technique [0002] In the downhole visible light imaging operation, in order to determine the downhole position of the detection part imaged by the logging probe, it is necessary to accurately locate the position of the logging probe. [0003] At present, in the process of prospecting and logging, the methods used to measure the depth of the logging probe in the downhole in real time mainly include the following methods: [0004] (1) Use a measuring rope marked with a length mark to measure, and then manually record or visually observe the depth of the measuring rope, so as to obtain the depth of the logging probe. This measurement method has the disadvantages of low measurement efficiency and large depth measurement error. [0005] (2) The wire rope passes through the pulley, and the pulley i...

AI Technical Summary

Problems solved by technology

This measurement method has the following disadvantages: due to the limited machining accuracy and assembly requirements of the sensing circuit constructed by the Hall sensor, its resolution for depth measurement is very limited, for example, the number of output pulses of the Hall sensor per revolution of the pulley Usually 16 to 32

In practical applications, if the wire rope is retracted and retracted too fast, the depth measurement error will be larger than the first measurement method, and it is very difficult to control

[0006] It can be seen that the existing logging probe depth measurement schemes generally have many problems such as low measurement efficiency, large measurement error, low measurement resolution, and inflexible use.

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