A special sending tool for well completion packer plug

Abstract

The invention discloses a feeding-in tool specialized for a well completion packer plug. The feeding-in tool is composed of an inner-layer structure, a middle-layer structure and an outer-layer structure. The outer-layer structure comprises an upper joint and an outer sleeve which are interconnected. The middle-layer structure comprises a connecting cylinder, a fixing pawl and a sphere seat. The inner side at the lower end of the outer sleeve is provided with a step surface. The connecting cylinder is arranged in the outer sleeve. The connecting cylinder is fixed to the outer sleeve through afixing ball. The lower end of the connecting cylinder is connected with the fixing pawl through a fixing pin. The outer side and the inner side at the lower end of the connecting cylinder are respectively provided with a step surface. The sphere seat is arranged at the inner side at the upper end of the connecting cylinder. The sphere seat is fixed to the connecting cylinder through a shearing pin. The feeding-in tool can realize wall entering and hand removing operations of the well completion packer plug.

Description

technical field [0001] The invention belongs to the technical field of oil and natural gas well completion, and more specifically relates to a special feeding tool for a well completion packer plug. Background technique [0002] When the completion packer is isolated and plugged, a plug tool is required for plugging. After plugging, the upper and lower pressure seals of the packer can be realized, ensuring the cleanliness of different intervals in the wellbore. Before the plug is operated, the plug feeding rod will be inserted into the plug recovery rod in advance. There is a pin hole on the feeding rod. The hole is aligned with the groove on the recovery rod and a shear pin is installed. The plug is connected by pins, and the force is limited. When the pipe string in the well is stuck, or the downhole is too fast, the external force acts on the position of the shear pin. Often, the plug does not reach the target position, and shears and separates from the feeding rod in adv...

AI Technical Summary

Problems solved by technology

Before the plug is operated, the plug feeding rod will be inserted into the plug recovery rod in advance. There is a pin hole on the feeding rod. The hole is aligned with the groove on the recovery rod and a shear pin is installed. The plug is connected by pins, and the force is limited. When the pipe string in the well is stuck, or the downhole is too fast, the external force acts on the position of the shear pin. Often, the plug does not reach the target position, and shears and separates from the feeding rod in advance. , the operation failed, and it was necessary to salvage the plug and go down the well again. The slow speed of going down the well also brought a lot of inconvenience to the site, mainly because of the high time cost

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