Method and device for retracting and extending adjusting arm of flow measuring and adjusting instrument

Abstract

The invention discloses a method and a device for retracting and extending an adjusting arm of a flow measuring and adjusting instrument. In the method disclosed by the invention, a control motor (8) arranged in an adjusting support tube (12) is adopted for driving a screw rod (7) to rotate, the rotating screw rod (7) drives a nut assembly (6) to carry out linear motion, and the nut assembly (6) pulls or releases an adjusting arm assembly (1) hinged to the adjusting support tube (12) by virtue of a pull rod (4); and through pulling, the adjusting arm assembly (1) can be retracted to the inside of a groove (13) of the adjusting support tube (12). According to the invention, the control motor is adopted for realizing the controllable retracting and extending of the adjusting arm, the driving force is large, the controllability is good, and the reliability is higher than those of other existing retracting and extending modes; the motor is adopted for realizing the controllable retracting and extending of the adjusting arm, and the arm retracting time and the arm extending time are respectively only 40 seconds, therefore, the efficiency is high and the requirements of oil fields on high-efficiency measuring and adjusting can be met; and a function 'carrying out repeated measuring and adjusting on an operation of descending a well ' of the flow measuring and adjusting instrument is realized. The method and device disclosed by the invention are suitable for being applied to the retracting and extending of the adjusting arm of the flow measuring and adjusting instrument in an oilfield well.

Description

technical field [0001] The invention relates to a method for retracting and retracting an adjusting arm of a flow measuring and adjusting instrument and a device thereof, and belongs to the technical field of downhole flow measuring and adjusting instruments. Background technique [0002] Precisely controlling formation water injection is an important means to enhance oil recovery in oilfields. Due to the problem of interlayer interference in formation water injection, in order to accurately adjust the amount of formation water injection and improve the efficiency of flow measurement and adjustment, it is required that the adjustment arm of the flow measurement and adjustment instrument can be controlled to retract, so as to realize the "one trip downhole, repeated measurement and adjustment" Function. At present, the regulating arm of the flow measuring and adjusting instrument mostly adopts a single motor with a clutch to realize the retracting and retracting of the regul...

AI Technical Summary

Problems solved by technology

The speed of retracting and retracting the adjusting arm by single motor with clutch is relatively slow, the time is as long as several minutes, and the efficiency is low. Environmental cleaning conditions have a greater impact and poor reliability

Therefore, the retractable mode of the regulating arm of the existing flow measuring and adjusting instrument is still not ideal.

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