An oil-casing threaded connection air tightness detection packer

Abstract

The invention discloses a gas tightness test packer for screwed connection of an oil sleeve pipe. The gas tightness test packer is mainly composed of an upper hand ring, an upper fixing sleeve, an upper rubber sleeve, an upper spring, an upper piston, an upper central pipe, a connecting sleeve, a lower central pipe, a lower protective sleeve, a high-pressure air intake joint, an upper protective sleeve, four one-way valves, four distance rings, a lower piston, a lower spring, a lower rubber sleeve, a lower fixing sleeve and a guide cone. According to the gas tightness test packer, the structure is simple, the operation is convenient, assembling, using, maintaining and upkeep are convenient; the functions of synchronously stable setting and asynchronously de-blocking are achieved, the problem of bursting out from the oil sleeve pipe when the packer is de-blocking is solved, and the safety of the staff is ensured; the recovery rate of the detected gas is also greatly increased, waste isavoided, the cost is lowered, a secondary piston can be used to complete setting with low air pressure, meanwhile the de-blocking speed of the packer is also improved, and the normal operation of thesite is not affected.

Description

technical field [0001] The invention relates to a detection tool in the field of petroleum equipment, in particular to an oil-casing threaded connection air tightness detection packer. Background technique [0002] Due to the processing error of the oil and casing, bumping in transportation, non-standard operation of micro-corrosion, etc., it is easy to cause oil and gas leakage due to the failure of the threaded thread of the oil and casing. The development of gas field development technology has put forward higher requirements for drilling and completion, injection and production technology, etc., in order to ensure the sealing performance of the oil and casing in the well, gas-tight buckle oil and casing are widely used in the well completion oil layer casing and production string . Moreover, due to the continuous innovation, promotion and application of deep well and horizontal well exploration and development technologies, as well as the large-scale use of natural gas ...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems mentioned in the above-mentioned background technology, the present invention particularly provides a simple structure and easy maintenance and maintenance of an oil-casing threaded connection air-tightness detection packer, and solves the problem of the existing packer setting Unstable, slow unsealing speed, packer is easy to rush out when unsealing, etc.

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