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A horizontal open-hole well stimulation and completion string and its combined operation method

A technology for horizontal open hole and completion strings, which is applied in the direction of wellbore/well components, earthwork drilling, production fluid, etc., to achieve the effect of improving operation effect, enhancing effective support, and reducing the risk of pipe sticking

Active Publication Date: 2020-03-20
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, at present, there is a lack of a horizontal open-hole completion deflagration fracturing stimulation technology in China.

Method used

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  • A horizontal open-hole well stimulation and completion string and its combined operation method

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] as attached figure 1 As shown, a horizontal open hole stimulation and completion string includes a large-size drill pipe 2 arranged in the upper casing 1, and a circulating sliding sleeve 4 is connected to the large-size drill pipe 2. The large-size drill pipe 2 The lower part of 2, located below the circulation sliding sleeve 4, is connected with a perforated tailpipe 8 sleeved outside the large-size drill pipe 2 through a hydraulic liner hanger; the end of the large-size drill pipe 2 is connected with a The small-sized drill pipe 3 in the pipe 8, the small-sized drill pipe 3 is connected with: check valve 9, shock absorber 10, pressure detonator 11, delay device 12, and bullet holes without bullets Gun 13, perforating gun 14 combined with deflagration fracturing, gun tail 15.

[0030] The perforated tailpipe 8 adopts the whole section to be perforated, and t...

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Abstract

The invention discloses a horizontal open hole well production increasing well completion pipe column and a combined operation method. The horizontal open hole well production increasing well completion pipe column comprises a large drilling rod, a circulating sliding sleeve is connected to the large drilling rod, and the lower portion of the large drilling rod is connected with a punching tail pipe arranged on the exterior of the large drilling rod in a sleeving mode through a hydraulic tail pipe suspender. A small drilling rod located in the punching tail pipe is connected to the tail end ofthe large drilling rod, and the small drilling rod is sequentially connected with a single flow valve, a damping device, a pressure exploder, a delaying device, a perforation gun not loaded with bullets, a perforation and detonation fracturing combined operation perforation gun and a gun tail from top to bottom. According to the horizontal open hole well production increasing well completion pipecolumn and the combined operation method, combined operation of perforation and detonation fracturing of a horizontal open hole well and punching pipe well completion is achieved, the detonation fracturing technology application range is effectively expanded, the number of times of trip is decreased, the risks of downhole tool pressure impacting, drill clamping, various technological interferenceand the like are reduced, downhole operation safety is ensured, the combination of perforation and detonation fracturing of the large hole density, the large hole diameter and a certain phase angle is adopted, and the production increasing operation effect is improved.

Description

technical field [0001] The invention relates to the field of oil and gas field reservoir transformation technology and well completion, in particular to a horizontal open-hole well stimulation and completion pipe string and a joint operation method. Background technique [0002] Deflagration fracturing, also known as high-energy gas fracturing, has more than 30 years of research and application history in China. It has been applied on a large scale in various medium and low permeability oil reservoirs in China. The effect is outstanding. It is a low-cost key development of oilfields. Gas fracturing technology. However, at present, this technology is mainly used in casing perforated wells and open-hole wells with small inclination angles. There are no research and implementation cases in horizontal open-hole wells. The main problems are that the well wall is easy to collapse after operation, and the construction pipe string is easy to stick. At the same time, there are probl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/263E21B43/116
CPCE21B43/116E21B43/263
Inventor 孙林黄波易飞杨万有邹信波程心平周际永刘景超杨军伟金颢
Owner CHINA NAT OFFSHORE OIL CORP
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