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Oil-pipe under-pressure dragging fracturing device and technology

A technology of dragging under pressure and tubing, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc. It can solve the problem of fracturing equipment and operating teams occupying a long time, unable to realize the operation of lifting and lowering the pipe string under pressure, Waste of fracturing fluid and other issues can be achieved to save spraying time, reduce equipment and labor costs, and improve construction efficiency

Inactive Publication Date: 2016-10-12
BEIJING YILONG HENGYE PETROLEUM ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, hydraulic jet fracturing has become a relatively mature fracturing technology, and the single-jet fracturing method has been used in various oilfields for many years. The supporting tools of this technology are simple and reliable, and the construction process is simple, but the pipe string cannot be lifted under pressure during construction. During operation, it is necessary to release the blowout until the wellhead has no pressure and then lift the tubing when transferring layer fracturing, resulting in long time occupation of fracturing equipment and operation team, low operation efficiency, and a large amount of fracturing fluid wasted and polluted during the pressure relief process. Environment etc.

Method used

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  • Oil-pipe under-pressure dragging fracturing device and technology
  • Oil-pipe under-pressure dragging fracturing device and technology

Examples

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Effect test

Embodiment Construction

[0033] During tubing dragging fracturing construction, an attachment is installed at the wellhead figure 1 Shown tubing drags fracturing wellhead device under pressure and goes into tubing 12 and accessory figure 2 The shown fracturing tool string and tubing are lowered into the downhole design layer, the packer 5 is set by pressure, and then the sand-containing liquid is injected at high pressure through the tubing 12, and the high-pressure liquid is ejected from the injector 7 to perform hydraulic injection. After drilling the target layer, the fracturing crew injects fracturing fluid from the circulation spool 16 to perform fracturing. During annular fracturing, oil pipe 12 simultaneously pumps fracturing fluid. Close slip preventer 14, close safety preventer 15. Jetting and fracturing operations are performed on purpose in accordance with hydrojetting procedures.

[0034] After the fracturing operation is completed and the pump is stopped, release the pressure between t...

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Abstract

The invention discloses an oil-pipe under-pressure dragging fracturing device and technology. The oil-pipe under-pressure dragging fracturing device comprises a fracturing tool and a fracturing wellhead device, wherein the fracturing tool comprises a choke plug (1), a sieve tube (2), a coupling (3), a double-severing backpressure check valve (4), a packer (5), a nipple (6), an injector (7), a first oil pipe nipple (8), a sand passing check valve (9), a second oil pipe nipple (10) and a working barrel (11), which are sequentially connected with one another in order; and the fracturing wellhead device comprises an annular blowout control device (13), a slip blowout control device (14) and a safety blowout control device (15). The invention further relates to the fracturing technology using the oil-pipe under-pressure dragging fracturing device.

Description

technical field [0001] The invention belongs to the field of oil and gas well development operations, and provides a new type of fracturing device. Specifically, the invention provides a oil pipe dragging fracturing device under pressure; Hip drag fracturing technology mainly includes snubbing operation technology and hydraulic jet fracturing technology. Background technique [0002] During the development of oil and gas wells, in order to open the production layer to increase the production of oil and gas, it is generally necessary to perform fracturing on the construction well during the development period. At present, hydraulic jet fracturing has become a relatively mature fracturing technology, and the single-jet fracturing method has been used in various oilfields for many years. The supporting tools of this technology are simple and reliable, and the construction process is simple, but the pipe string cannot be lifted under pressure during construction. During operati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
CPCE21B43/261
Inventor 康振才褚海
Owner BEIJING YILONG HENGYE PETROLEUM ENG TECH
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