Underground operation integrated shaft processing tool and method

Abstract

The invention discloses an underground operation integrated shaft processing tool and method. The processing tool comprises a check valve, a drift size gauge, a sealing rubber cup and a pipe scraper which are sequentially connected from top to bottom, wherein the drift size gauge is provided with a plurality of high-pressure jet cleaning holes which are through in the radial direction. The aperture of each high-pressure jet cleaning hole is 3mm. The high-pressure jet cleaning holes are spirally and uniformly distributed in the drift size gauge. A pipe shoe is connected to the lower end of thepipe scraper. The pipe scraper comprises a pipe scraper body and a scraper, and the scraper is arranged on the outer wall of the pipe scraper body. According to the underground operation integrated shaft processing tool, casing pipe scraping, high-pressure fluid flushing and drafting process are integrated to realize the continuous and efficient well wall cleaning function. The integrated construction of drafting process, pipe scraping and flushing is realized, the construction period is shortened, and the operation time is improved. The purposes of prevention, handling, and improvement of shaft environment are realized, and the risks of obstacles and blocking in subsequent construction are reduced.

Description

technical field [0001] The invention relates to a construction tool for oil and water well workover operations in an oil field, in particular to an integrated wellbore processing tool and method for downhole operations. Background technique [0002] The oil field has entered the late stage of ultra-high water-cut development, and with the water content rising, the salinity of the produced liquid is high; due to various conditions in the water injection well, factors such as unqualified injected water quality are very easy to form scaling on the inner wall of the casing. [0003] The main factors that cause the poor cleanliness of the inner wall of the wellbore are as follows: [0004] 1. High salinity of output and injected water. [0005] 2. The oil well is waxed, and the hard wax adheres to the inner wall of the casing. [0006] 3. Drilling plug remains cement after plugging. [0007] Impact on oil and water wells: [0008] 1. Scale and hard wax aggravate the corrosion...

AI Technical Summary

Problems solved by technology

[0006] 3. Drill plug residual cement after plugging

[0008] 1. Scale and hard wax aggravate the corrosion degree and speed of the casing, resulting in a decrease in the compression resistance of the casing, resulting in casing damage such as casing corrosion, perforation, and leakage

[0009] 2. Cause the packer to slip and seal, fail, cause invalid procedures and even cause engineering accidents

[0010] 3. The downhole tool is blocked or stuck

[0012] 1. Well drilling: Running the drilling gauge is only to detect the inner diameter of the casing, and has little effect on cleaning the inner wall of the casing. Scaling and hard wax will also cause resistance and jamming

[0013] 2. Casing scraping: Conventional scrapers perform well cleaning after scraping or in place, and the treatment effect is not good

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