Integrated device for casing damage well composite repair

A composite material and subsidy technology, applied in wellbore/well components, earth-moving drilling, etc., can solve the problems of high protection and requirements of the pipe body during the expansion process, increasing the difficulty of operation and handling, and inability to pull out.

Active Publication Date: 2019-03-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(4) During the construction process, the hydraulic cold extrusion expansion device of the expansion tube is relatively complicated, and the expansion cone is prone to be stuck in the expansion tube, which can neither be pulled out nor continued to expand and advance, which increases the difficulty of operation processing
(5) After expansion, a series of pipe string operations such as bottom drilling and plugging are required, with many process steps an

Method used

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  • Integrated device for casing damage well composite repair
  • Integrated device for casing damage well composite repair
  • Integrated device for casing damage well composite repair

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] This embodiment provides an integrated device for composite material subsidy for casing damaged wells, and its structural schematic diagram is as follows figure 1 shown, from figure 1As can be seen in the figure, the device includes a cable setting tool, a cable heating tool and a hanging and throwing tool;

[0098] Wherein, the cable seating tool includes a centralizer 4, an electromagnetic expansion disc 5, a rigid expansion head 11, an elastic expansion head 12 and a plug 13;

[0099] The hanging and throwing tool includes an upper end hanging throwing tool, a middle end hanging throwing tool and a lower end hanging throwing tool;

[0100] One end of the upper end of the hanging tool is connected to the cable 2 through the upper safety joint 3, and the other end of the upper hanging tool is connected to the centralizer 4;

[0101] One end of the mid-end hanging tool is connected to the centralizer 4, and the other end is connected to the electromagnetic expansion d...

Embodiment 2

[0112] This embodiment provides a self-expanding subsidy method for oil well casing (with an outer diameter of ф93.9mm-ф450mm), which uses the integrated device (tool set ) to achieve, the specific process flow diagram of the method is as figure 2 shown, from figure 2 It can be seen that it includes the following specific steps,

[0113] Step 101: the cable seat is placed on the bridge plug, which specifically includes connecting the working cable to the cable bridge plug, lowering the cable bridge plug into a reliable position below the casing damage section in the well, and driving the bridge plug to set to separate the lower part of the well from the upper casing damage section;

[0114] Step 102: Scraper treatment, specifically including connecting the working tubing to a mechanical scraper, or connecting the cable to an electric scraper and running it into the well, and scraping the inner surface of the casing damage section to be subsidized to remove the attached corr...

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Abstract

The invention provides an integrated device for casing damage well composite repair. The device comprises a cable seating placing tool, a cable heating tool, and a hanging releasing tool. The cable seating placing tool comprises a centering guide, an electromagnetic expansion disk, a rigid expansion head, an elastic expansion head and a plug. The hanging releasing tool comprises an upper end hanging releasing tool, a middle end hanging releasing tool, and a lower end hanging releasing tool. One end of the upper end hanging releasing tool is connected with a cable by an upper safe connector. The other end of the upper end hanging releasing tool is connected with the centering guide. One end of the middle end hanging releasing tool is connected with the centering guide. The other end of themiddle end hanging releasing tool is connected with the electromagnetic expansion disc. The electromagnetic expansion disk is connected with the upper end of the cable heating tool. The lower end of the cable heating tool is connected with one end of a lower safe connector. The other end of the lower safe connector is connected with the rigid expansion head by the lower end hanging releasing tool.The rigid expansion head is connected with the plug by the elastic expansion head.

Description

technical field [0001] The invention relates to an integrated device for composite material subsidy for casing damaged wells, and belongs to the technical field of casing damaged well treatment in oil and gas fields. Background technique [0002] Casing damaged wells refer to oil, gas and water wells with damaged casings. Generally, according to the nature of casing damage, it can be divided into casing deformed wells, casing faulted wells and casing broken leakage wells. The casing damage of oil, gas and water wells is an important factor affecting the stable production of oil fields. [0003] For wells with broken casings, the current treatment technologies mainly include water-separated oil production, chemical plugging, casing subsidies, small casing repairs, and sidetracking. The simplest and most economical method is water isolation, which is also the main technology at present. It mainly includes the following steps: set the mechanical packer above the target layer ...

Claims

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Application Information

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IPC IPC(8): E21B29/10E21B41/02E21B41/00
CPCE21B29/10E21B41/00E21B41/02
Inventor 李琼玮薛建强孙雨来程碧海杨立华谷成义戚建晶王小勇李慧杨会丽
Owner PETROCHINA CO LTD
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