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Sliding sleeve switch string and using method thereof

A sliding sleeve switch and pipe string technology, which is applied in the direction of mining fluid, earthwork drilling, cleaning equipment, etc., can solve the problem of poor cooperation between the switch tool lock block and the shoulder, reduce the reliability of the sliding sleeve switch tool string, and prevent scraping. cleanliness and other problems, to achieve the effect of alleviating downhole resistance, reducing the amount of use, and improving the firmness of the fit

Active Publication Date: 2016-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the direct step of the inner sleeve of the sliding sleeve, it is easy to form a dead angle at the step when the cementing plug is replaced, and the scraping is not clean, resulting in the retention and solidification of the cement slurry, which causes the phenomenon that the switch tool lock block and the shoulder are not firmly matched. , which reduces the reliability of the sliding sleeve switch tool string

Method used

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  • Sliding sleeve switch string and using method thereof
  • Sliding sleeve switch string and using method thereof
  • Sliding sleeve switch string and using method thereof

Examples

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing.

[0033] figure 1 A sliding sleeve switch string 10 according to the invention is schematically shown. The sliding sleeve switch string 10 includes a coiled oil tube 11 on which a pair of locking block tools 13 and 14 are arranged. The locking block tools 13 and 14 can protrude from the surface of the coiled tubing 11 so as to be used to open the sliding sleeve 39 (such as Figure 5 shown) and closing the sliding sleeve 39, for example, the locking block tool 13 is used to close the sliding sleeve 39, and the locking block tool 14 is used to open the sliding sleeve 39. exist figure 1 In the exemplary embodiment shown, the locking means 13 for closing the sliding sleeve 39 is arranged upstream of the locking means 14 for opening the sliding sleeve 39 . Inside the coiled tubing 11, a cleaning device 20 is provided downstream of the block tool. The cleaning device 20 includ...

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PUM

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Abstract

The invention relates to a sliding sleeve switch string, including a coiled oil tube, a pair of locking block tools which can protrude from the surface of the coiled oil tube and are respectively used to open and close the sliding sleeve are arranged on the coiled oil tube. Inside the coiled tubing, a cleaning device is arranged downstream of the locking block tool, and the cleaning device includes a cleaner that can protrude from the surface of the coiled tubing and a driver that drives the cleaner. By filling the coiled tubing with fluid at a certain flow rate, the cleaning device can first clean the inside of the sliding sleeve, and then the locking block tool is engaged with the sliding sleeve, which is then used to open or close the sliding sleeve. The working reliability of the sliding sleeve switch tool string is improved.

Description

technical field [0001] The invention relates to a fracturing device, in particular to a sliding sleeve switch string. The invention also relates to methods of using such slip-on switch strings. Background technique [0002] The growing demand for energy has led to more and more attention to unconventional energy sources such as low-permeability oil and gas reservoirs and shale oil and gas reservoirs. The development of low-permeability oil and gas reservoirs and shale oil and gas reservoirs has become an important growth point of the country's "12th Five-Year Plan" energy development. For these types of reservoirs, horizontal well staged fracturing methods have significant advantages for enhanced recovery. [0003] In the prior art, the sliding sleeve is usually opened and closed by lifting or lowering the pipe string through the cooperation between the locking block of the sliding sleeve switch tool string and the step of the inner sleeve of the sliding sleeve. However, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B37/00
Inventor 郭朝辉魏辽马兰荣朱玉杰高原
Owner CHINA PETROLEUM & CHEM CORP
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