A pushing device in a transmission device for lowering and recovering vertical well logging instruments

Abstract

The invention provides a pushing device used in a transmission device for lowering and recovering a vertical well logging instrument, which includes a driving device, a transmission mechanism and a fixing device, and the driving device is provided with a fixing structure for fixing on a supporting device Above, the fixing device is connected with the driving device through the transmission mechanism, and the fixing device is provided with a clamping and fixing device to fix the instrument, and the transmission mechanism passes through the driving device, so that the instrument fixed on the fixing device is pushed to the well wall and Retraction; the logging instrument is clamped and fixed on the fixing device of the pushing device, so as to be pushed to the well wall by the driving device to perform measurement operations and return to the side of the support pipe. The pushing device provided by the present invention can well realize that the logging instrument is pressed against the well wall.

Description

technical field [0001] The invention relates to the field of geophysical well logging, in particular to a pushing device in a conveying device used for lowering and recovering vertical well logging instruments. Background technique [0002] As a new technology, geophysical logging technology has received more and more attention, and vertical well logging has developed rapidly under this situation. In order to learn more and more accurate geophysical information, geophysicists usually lower the logging instruments to designated locations downhole to monitor the downhole geophysical information in real time. At the same time, due to the high cost of logging instruments, in After completing the logging work, it often needs to be recovered to the ground for secondary use. Therefore, it is of far-reaching significance to design a conveyor device suitable for the lowering and recovery of vertical well logging tools. [0003] In well logging, for some measuring instruments, such a...

AI Technical Summary

Problems solved by technology

[0004] In the current design scheme of the pushing device, there are generally the following problems: (1) There is no buffer device in the pushing device, which leads to the fact that in some schemes, the instrument is easily squeezed and deformed after touching the well wall; in other schemes, the instrument is not designed. It can ensure that it can be pushed against the well wall; (2) The flexibility of the push arm is poor, and the posture of the logging instrument cannot be adjusted according to the actual well wall conditions, which leads to the inability of the instrument to closely fit the well wall; (3 ) Compatibility is poor, the pushing device can only work for specific logging tools, and cannot adapt to the pushing requirements of logging tools of different types and shapes; The scheme is not combined with the actual logging equipment or logging instruments, resulting in the pushing device not being used in the actual logging project

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