Automatic setting mechanism for concentric seal-examining and testing adjusting instrument, and concentric seal-examining and testing adjusting instrument

Abstract

The invention discloses automatic setting mechanism for a concentric seal-examining and testing adjusting instrument, and the concentric seal-examining and testing adjusting instrument and relates tothe technical field of layered water injection of oil fields. The automatic setting mechanism comprises a shell, a first clutch mechanism, a first sliding sleeve, a second sliding sleeve, a second clutch mechanism, a first driving piece, a second driving piece and a pressure sensor; a first expansion mechanism and a second expansion mechanism are arranged on the side wall of the shell; the first clutch mechanism comprises a first shaft, a clutch sleeve, a first transmission sleeve, a cam, a second shaft and a first elastic piece; the first sliding sleeve can drive the clutch sleeve to move inthe vertical direction and is provided with a positioning mechanism; the second sliding sleeve is connected to the lower end of the first sliding sleeve in a threaded mode; the second clutch mechanismcomprises a second transmission sleeve arranged on the second sliding sleeve, a third sliding sleeve connected to the lower end of the second shaft, and a third shaft capable of making contact with the third sliding sleeve and making transmission with the third sliding sleeve; the first driving piece and the second driving piece are arranged on the side wall of the second sliding sleeve; and thepressure sensor is used for measuring the pressure between the first expansion mechanism and the second expansion mechanism.

Description

technical field [0001] The invention relates to the technical field of layered water injection in oilfields, in particular to an automatic setting mechanism for a concentric seal test and adjustment instrument and a concentric seal test and adjustment instrument. Background technique [0002] During the production and development of oilfields, along with the extraction of crude oil, the formation energy gradually decreases, which makes it more difficult to extract crude oil. In order to maintain formation energy and improve the utilization rate of oil formation, the loss of formation energy is replenished by injecting water into the formation, so as to achieve the purpose of continuous production of oil formation and increase the recovery rate of oil formation. At present, oilfield water injection can be divided into the following categories, including general water injection, eccentric water injection and concentric water injection. Among them, both eccentric water injecti...

AI Technical Summary

Problems solved by technology

Concentric water injection simplifies the operation process of eccentric water injection, but it usually takes 3 times to complete the operation.

Chinese patent application No. 201520507771.X and Chinese patent application No. 201521018241.5 respectively disclose a bridge-type concentric testing and testing integrated testing instrument and a bridge-type concentric testing and testing integrated control device. Concentric water injection well seal inspection, testing and adjustment integration, but the above-mentioned device has a high failure rate due to its complex internal structure

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