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Tools for spray seal pressure and tubing strings containing them

A technology of tools and nozzles, which is applied in the field of tools and strings containing them, to achieve the effects of ensuring accuracy and precision, improving fracturing effects, and reducing operating costs

Active Publication Date: 2018-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Through the above method, although the stimulation of the reservoir can be completed, it is necessary to run multiple strings to complete the perforation and sand fracturing

Method used

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  • Tools for spray seal pressure and tubing strings containing them
  • Tools for spray seal pressure and tubing strings containing them
  • Tools for spray seal pressure and tubing strings containing them

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The present invention will be further described below in conjunction with accompanying drawing.

[0042] figure 1 The tool 100 for spray sealing pressure is shown in an initial state according to an embodiment of the invention. Such as figure 1 As shown, the tool 100 includes a cylindrical upper joint 1 , a nozzle sleeve 2 , a central rod 3 , a packer 4 , a lower joint 5 , a first inner cylinder 60 and a second inner cylinder 6 . Wherein, the upper joint 1 is configured in a cylindrical shape, and is used to connect with the tubing 8 to send the tool 100 into the reservoir, and the outer wall of the upper joint 1 is provided with a fracturing hole 9 communicating with the inside and outside. The nozzle cover 2 is arranged at the lower end of the upper joint 1 and is configured in a cylindrical shape. At the same time, a nozzle 7 communicating with the inside and outside is provided on the peripheral wall of the nozzle cover 2 . The central rod 3 is arranged on the l...

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PUM

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Abstract

The invention provides a tool used for spraying-sealing fracturing and a tubular column comprising the same. The tool comprises a barrel-shaped upper connector, a nozzle sleeve, a central rod, a packer, a lower connector, a first inner barrel arranged in the upper connector and a second barrel arranged in the nozzle sleeve, wherein the upper connector is provided with fracturing holes, and the nozzle sleeve is provided with nozzles. In an initial state, the fracturing holes are sealed by the first inner barrel, and the nozzles are blocked by the second inner barrel. After an inner cavity of the second inner barrel is sealed, pressure liquid is pumped into the tool, when first pressure is reached, the second inner barrel moves downwards to expose the nozzles, the packer is set, and at the moment, perforation can be conducted. After perforation is completed, pressure liquid is injected into an annulus, when second pressure is reached, the first inner barrel moves downwards to expose the fracturing holes, and fracturing operation can be conducted at the moment. By means of the tool, work efficiency can be improved, and the operation cost is lowered.

Description

technical field [0001] The invention relates to the technical fields of oil and gas well completion and reservoir reconstruction, and in particular to a tool for spray sealing pressure and a pipe string containing the same. Background technique [0002] With the advancement of exploration and development of unconventional oil and gas reservoirs, staged well completion fracturing technology, as the main production stimulation measure for unconventional oil and gas resources exploitation, is also developing rapidly. Completion staged fracturing technology can be used to stimulate reservoirs in a targeted manner, expand the oil drainage area of ​​oil and gas production layers, and improve oil and gas recovery. [0003] In the prior art, multi-stage and staged reservoir stimulation is usually carried out by perforating first and then fracturing. That is, in the process of reservoir stimulation, the perforating gun is first lowered to perform multi-stage and segmented perforatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/114E21B43/26E21B33/128
CPCE21B33/1285E21B43/114E21B43/26
Inventor 甘振维戚斌胡顺渠侯治民雷炜刘涛王磊潘敏滕汶江崔警宇周怡君
Owner CHINA PETROLEUM & CHEM CORP