Water injection propulsion method and controllable water injection thruster for horizontal well testing instrument

Abstract

The invention discloses a water injection propelling method for a horizontal well testing instrument and a controllable water injection propeller. The water injection propelling method for the horizontal well testing instrument and the controllable water injection propeller are mainly applied to well logging of horizontal wells in an oil field or highly-deviated wells with the deviated angles of over 60 degrees. The propeller is controlled to be powered on / off through a ground well logging numerical control system, and the testing instrument is propelled to a testing target layer segment by the aid of pressure of wellhead water injection. The testing instrument is connected to the upper portion or the lower portion of the controllable water injection propeller and goes down into an oil pipe, and the controllable water injection propeller can be controlled to be powered on / off through the ground well logging numerical control system; when the controllable water injection propeller is powered off, water is injected into the oil pipe from a wellhead for pressurization so that the injected water can propel the controllable water injection propeller to drive the testing instrument to move downwards; in this way, the controllable water injection propeller and the testing instrument can be controlled to be lifted up or dropped down on the ground, the controllable water injection propeller is convenient to use, and the amount of the injected water is small. Accordingly, the problem of propelling a testing instrument in an oil pipe of a horizontal well and a highly-deviated well in the prior art is solved, a means is provided for production logging in the horizontal well and highly-deviated well, and production management is facilitated.

Description

technical field [0001] The invention relates to a well pushing method and a propulsion tool of a horizontal well testing instrument, in particular to a water injection propelling method and a controllable water injection thruster of the horizontal well testing instrument, which are mainly used in the testing of horizontal wells in oilfields or highly deviated wells exceeding 60 degrees. During the well operation, the switch of the thruster is controlled by the surface logging numerical control system, and the test instrument is pushed to the test target interval with the help of the pressure of water injection at the wellhead. Background technique [0002] With the deepening of oilfield exploration and development and the development of drilling technology, the number of horizontal wells and highly deviated wells in the oil area is increasing year by year, and the workload of horizontal well logging increases accordingly. Since the test instrument is lowered in the oil well ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a water injection propelling method and a controllable water injection thruster for horizontal well testing instruments, so as to solve the problem of propelling the testing instruments in the tubing of horizontal wells and highly deviated wells at present, and to provide a new solution for the production of horizontal wells and highly deviated wells. Logging provides means to facilitate production management

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