Combined staged fracturing device, asynchronous double-path extraction system and method

A segmented fracturing and conveying device technology, which is applied in the direction of mining fluid, earthwork drilling, drilling equipment, etc., can solve the problems of low gas drainage efficiency in soft and low-permeability coal seams, and achieve shortened operation cycle, shortened operation cycle, The effect of improving fracturing efficiency

Active Publication Date: 2021-10-22
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects and deficiencies in the prior art, the present invention provides a combined segmental fracturing device, an asynchronous two-way drainage system and method to solve the technical problem of low gas drainage efficiency in broken, soft and low-permeability coal seams in the prior art

Method used

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  • Combined staged fracturing device, asynchronous double-path extraction system and method
  • Combined staged fracturing device, asynchronous double-path extraction system and method
  • Combined staged fracturing device, asynchronous double-path extraction system and method

Examples

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Embodiment 1

[0044] Compliance with the above technical solutions, such as Figures 2 to 4 , The present embodiment provides a downhole coiled tubing fracturing segment joint, downhole coiled tubing apparatus comprising a transport platform, the transport platform downhole coiled tubing apparatus 1 in the lateral front-to-rear lift cylinder with a vertically disposed sequentially 2, the power delivery device downhole coiled tubing BOP lift crane 3 and 4, the drum 2 is provided with a lift cylinder 5, with about a downhole coiled tubing 6 on the drum 5, the downhole coiled tubing is provided on the power transmission device 3 lifts continuous downhole tubing power transfer device 7, provided with a blowout preventer BOP lift 4 8;

[0045] BOP 8 and 9 is connected to the orifice means, the orifice device 9, 8 and the BOP power downhole coiled tubing annulus formed between the conveying device 7; 6 coiled tubing downhole in coiled tubing downhole in a power driven conveyor device 7 reciprocate bac...

Embodiment 2

[0058] like Figure 5 , The present embodiment provides a two-way asynchronous staged fracturing combined gas drainage system comprising a disclosed embodiment of the downhole coiled tubing joint Example staged fracturing apparatus further comprises a downhole fracturing fluid shunt device 21, downhole fracturing fluid shunt device 21 and the ground input terminal connected to the output of the coiled tubing 22, a first output terminal of a downhole fracturing fluid shunt device 21 is connected to the annulus of sand fracturing fluid conduit 13, 21 downhole fracturing fluid shunt device a second output terminal through the coiled tubing downhole hydraulic fluid injection conduit 23 in communication with the downhole coiled tubing 6. the coiled tubing downhole hydraulic fluid injection conduit is provided with a coiled tubing downhole fluid delivery control valve 26, annulus 13 sand fracturing fluid conduit 23 It is provided with an annulus of sand fracturing fluid delivery control ...

Embodiment 3

[0068] Pumping the present embodiment the target coal seam mining a seam of high gas coal, the coal seam consistent coefficient f is 0.3, the gas content of the coal seam 14 ~ 20m 3 / T, is a high gas outburst, a serious threat to the safety of coal.

[0069] like figure 1 , The present embodiment provides a two-way asynchronous staged fracturing combined gas drainage method, the method disclosed in Example 2 Combined dual asynchronous staged fracturing implemented gas drainage system, comprising the steps of:

[0070] Step 1, in the coal seam, the coal seam is covered with a migration roadway and the construction of multiple orientation drilled holes, and then the next sleeve is completed;

[0071] In the present embodiment, as it is preferred, according to the distance between holes of the neighboring directional length of 50 ~ 60m long drilling arrangement, the design depth of hole 300 ~ 800m, divided into five segments fracturing, coiled tubing outer diameter surface is 82.6mm...

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Abstract

The invention discloses a combined staged fracturing device, system and method for an underground continuous oil pipe. The device comprises an underground continuous oil pipe device transportation platform, a roller, an underground continuous oil pipe power conveying device and a blowout preventer, wherein the roller is arranged on the underground continuous oil pipe device transportation platform and wound with the underground continuous oil pipe; the underground continuous oil pipe power conveying device drives the underground continuous oil pipe to reciprocate front and back in an annulus formed by an orifice device, the blowout preventer and the underground continuous oil pipe power conveying device. The system comprises the combined staged fracturing device for the underground continuous oil pipe and an underground fracturing fluid distribution device, wherein the input end of the underground fracturing fluid distribution device is connected with the fracturing fluid output end of a ground continuous oil pipe, and the output end of the underground fracturing fluid distribution device is communicated with an annulus sand fracturing fluid pipeline and the underground continuous oil pipe. The invention further discloses the combined staged fracturing method for the underground continuous oil pipe. According to the method, combined operation of orifice pressure non-blowout type perforation and annulus injection fracturing is realized, and the staged fracturing operation period of underground long drilling is shortened.

Description

Technical field [0001] The present invention belongs to the technical field of coal mine gas extracts, and the apparatus and method involving gas extract, and is specifically involved in a combined segmental fracturing device, asynchronous dual-circuit extraction system and method. Background technique [0002] Ground coalbed methane development and coal mine underground negative gas extract is a conventional means of coal-block gas, but the existing ground coalbed methane development method has high investment cost, long pumping cycle, low extractivity, large terrain limit Disadvantage; under the coal mine underground, gas in the coal mine is small due to the restriction of the operating environment conditions under the well, and the disadvantage of the equipment is difficult, the equipment is transported, the coal seam is poor. Using the large-scale sand fracturing technology in the development of ground coalbed methane can increase the precise positioning advantage of the lowe...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B43/267E21B43/114E21B19/22E21B43/00
CPCE21B43/26E21B43/2607E21B43/267E21B43/114E21B19/22E21B43/006
Inventor 刘磊张群姜在炳程斌舒建生降文萍杨建超李浩哲
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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