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Fracturing anti-roof tool

A technology of anti-roofing and tools, applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of difficult operation of high-pressure wells, failure of oil wells to be put into production in time, etc., to achieve simple and firm anchoring, safe tripping, good blocking effect

Pending Publication Date: 2019-08-16
LIAONING XINHUA INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fracturing anti-top tool to overcome the existing difficulties in high-pressure well operation and the problem that the oil well cannot be put into production in time after fracturing

Method used

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  • Fracturing anti-roof tool

Examples

Experimental program
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Embodiment Construction

[0012] See figure 1 , The upper joint 1 is threadedly connected with the upper transmission shaft 2, and the upper transmission shaft 2 is processed with a liquid inlet A and a keyway B. The fixing sleeve 3 is connected with the release sleeve 5 through the release pin 39-1. The thrust spring 51 is placed outside the fixed sleeve 3 . The key 6 is connected to the release sleeve 5 through the socket head cap screw 50 and put into the keyway B of the upper transmission shaft 2 . The fishing joint 4 is threadedly connected with the transmission sleeve 7 and is provided with a set screw 60 with a hexagonal cone end, and the inner hole of the fishing joint 4 is provided with a fishing thread C. The transmission sleeve 7 is processed with a keyway D, and is threadedly connected with the transmission joint 8, and placed on the outside of the upper transmission shaft 2. See figure 2 , The middle transmission shaft 21 is threadedly connected with the lower end of the upper transmi...

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PUM

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Abstract

The invention discloses a fracturing anti-roof tool, which comprises an upper drive shaft, a middle drive shaft, a lower drive shaft, an upper center tube, a lower center tube, an upper cone, a lowercone, slips, a side rubber cylinder, a middle rubber cylinder, a release ring, and a lower working cylinder. The fracturing anti-roof tool is characterized in that the fracturing anti-roof tool is connected to a release sleeve in a key mode and put into a key groove of the upper drive shaft; a ball groove is formed in the lower part of the middle drive shaft; a ball hole for placing a steel ball is formed in the upper center tube; the upper cone is fixed to a drive joint by deblocking pins, and the lower part of the upper cone is fixed to a locking ring groove of the upper center tube by usingan upper clamping ring; limit pins connected to the lower cone are located in pin grooves in a guide sleeve, and the inner ends of guide pins connected to the guide sleeve are located in pin groovesof the lower cone; a clamping spring is arranged in an installation groove in a fixing piston, and an inner cylinder of the release cylinder is provided with anti-inverted inclined teeth opposite to the direction of anti-inverted inclined teeth of the clamping spring. The fracturing anti-roof tool can prevent blowout during dismounting, the blocking effect is good, setting is convenient, anchoringis simple and firm, time is saved, the operating cost is lowered, and dismounting is safe.

Description

technical field [0001] The invention relates to a downhole tool for oil exploitation, in particular to a fracturing anti-roofing tool that does not need to be pulled out for a packer in a fracturing well, and can directly complete the plugging and blowout functions after fracturing, and can be lowered into an oil well pump for production at any time. Background technique [0002] In oil extraction, there are many oil wells that cannot be operated due to high pressure, especially after fracturing, the oil wells have a large amount of fluid output and high pressure, and cannot be operated and put into production. They can only be operated after pressure relief or under pressure. Significantly Increased production costs. Contents of the invention [0003] The purpose of the present invention is to provide a fracturing anti-top tool to overcome the existing problems of high-pressure well operation difficulties and the failure of the oil well to be put into production in time a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/127E21B43/26
CPCE21B33/1216E21B33/127E21B43/26
Inventor 梁伟成梁闯
Owner LIAONING XINHUA INSTR CO LTD
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