Soluble bridge plug fracturing technology pipe string and fracturing method thereof

A technology of process pipe string and soluble bridge, which is used in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problems of increasing operation cost, prolonging operation period, and high performance requirements of fast-drilling bridge plugs. High efficiency, reducing construction risks, and facilitating the effect of post-transformation operations

Active Publication Date: 2015-01-14
PETROCHINA CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This process has high requirements on the performance of the fast-drilling bridge plug. Once it is set, it cannot be discarded. The cable will be cut and fall into the well, causing downhole accidents.
This technology needs to use coiled tubing to drill bridge plugs, which will greatly increase the operating cost and prolong the operating cycle

Method used

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  • Soluble bridge plug fracturing technology pipe string and fracturing method thereof

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Experimental program
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Embodiment

[0012] refer to figure 1 Embodiments of the present invention are further described:

[0013] The lower end of the cable 1 of the pipe string in this process is connected to the magnetic locator 3 through the cable head 2, and the lower end of the magnetic locator 3 is connected to the weighting rod 4, the third-stage ignition head 5, the second-level perforating gun 6, the second-level ignition head 7, and the first-level Perforating gun 8, primary ignition head 9, setting tool 10 and soluble bridge plug 11.

[0014] The specific steps of the fracturing method of the soluble bridge plug fracturing process string are as follows:

[0015] 1) Drilling and flushing the well, deep operation, run in the soluble bridge plug tool string, adjust the depth in real time through the magnetic locator 3, lower the soluble bridge plug 11 to the design position and set the seal, and carry out the first stage of perforation and smooth casing Pipe fracturing construction;

[0016] Soluble b...

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Abstract

The invention discloses a soluble bridge plug fracturing technology pipe string and a fracturing method of the soluble bridge plug fracturing technology pipe string. The soluble bridge plug fracturing technology pipe string and the fracturing method are designed to improve construction efficiency and bring convenience to later transformation of oil-gas wells. The pipe string is connected with a cable head, a magnetic position indicator, a weighing rod, a three-level ignition head, a second-level perforating gun, a second-level ignition head, a first-level perforating gun, a first-level ignition head, a setting tool and a soluble bridge plug sequentially through cables. The processes of drifting, well washing, deeper operation, setting of the soluble bridge plug, perforation of sections, fracturing of light casing pipes, blowout, flow back of the bridge plug and well completion are implemented. The soluble bridge plug replaces a quick drilling bridge plug, construction risks of the cable operation can be reduced, the rest of parts of the bridge plug flow out of the ground through blowout after fracturing construction is finished, construction efficiency is high, the large diameter of casing pipes can be kept, and later transformation work of oil-gas wells is convenient.

Description

technical field [0001] The invention relates to a soluble bridge plug fracturing process pipe string and a fracturing method thereof, belonging to the technical field of oil and gas field fracturing. Background technique [0002] At present, the staged fracturing of horizontal wells in oil and gas fields mainly includes open hole packer, hydraulic sandblasting and hydraulic bridge plug and other technologies. The hydraulic bridge plug has the characteristics of reliable isolation, casing fracturing and staged fracturing without limitation. To the predetermined position, seal and release the bridge plug and separate from the perforating gun, lift the perforating gun to the perforation position, perform multi-cluster perforation according to the design, then lift the drilling tool to the wellhead, use low-viscosity clean water or mixed water The light casing fracturing operation was carried out, and the operation of multiple intervals was completed sequentially from bottom to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 姜勇赵振峰桂捷王效明胡相君白小佩张安康李旭梅
Owner PETROCHINA CO LTD
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