Device and method for integrating well dredging and well flushing, and well logging of cement bond well cementing quality

Abstract

The invention discloses a device and a method for integrating well dredging and well flushing, and well logging of cement bond well cementing quality. The device comprises a continuous oil pipe, an ordinary oil pipe or a drill rod which extend into a petroleum well to be connected from top to bottom, wherein the continuous oil pipe, the ordinary oil pipe or the drill rod is connected with a protecting pipe through a rotating connector, and an instrument bunch which is centralized through a pair of centralizers is arranged in a pipe cavity of the protecting pipe; the end part of the protecting pipe is connected with a gauge cutter; a piston which is connected with the rotating connector through a shear pin is arranged in the pipe cavity of the protecting pipe, and the piston is connected with the instrument bunch; a locking mechanism is arranged between the piston and a piston rod, and an unlocking mechanism is arranged on the gauge cutter. A technology comprises two stages of the well dredging and the well flushing, and the well logging of cement bond well cementing quality. The integrated technology technique reduces the number of times that equipment enters the well, reduces the amount of well logging equipment, shortens the well logging time, reduces the equipment investment, and has good market application prospects.

Description

technical field [0001] The invention relates to an oil field cementing quality testing technology, in particular to a cement cementing cementing quality testing technology and a construction device for oil well drilling and flushing, and is especially suitable for horizontal wells and high-inclination wells. Background technique [0002] The existing technology is that after the cement cementation is completed, the coiled tubing or ordinary tubing (or drill pipe) is used to go down the well with the well gauge, and the well drilling and well washing operations are carried out. After the operation is completed, the coiled tubing or ordinary tubing is pulled out from the downhole. (or drill pipe), and finally use a cable to connect a cement bonded cementing quality measuring instrument to go downhole to measure and evaluate the cementing quality. This method needs to go down the well twice, and the ground needs to be equipped with a logging vehicle. If it is a horizontal well ...

AI Technical Summary

Problems solved by technology

This method needs to go down the well twice, and the ground needs to be equipped with a logging vehicle. If it is a horizontal well or a highly deviated well, it also needs to be equipped with a horizontal well crawler. It takes a long time, the equipment is complicated, and professional logging technicians are required.

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