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Carbon dioxide low-pressure manifold picking tool and application and fracture method thereof

A carbon dioxide, low-pressure manifold technology, applied in earth-moving drilling, wellbore/well components, and production fluids, etc., can solve the problems of complex connections, multiple low-pressure pipelines, and high safety risks, and achieve noise reduction, large-displacement supply, etc. The effect of liquid and high-efficiency liquid supply

Pending Publication Date: 2018-10-26
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a carbon dioxide low-pressure manifold skid, which overcomes the complex connection of low-pressure pipelines in the construction organization mode of carbon dioxide fracturing in the prior art, the long preparation time in the early stage, the heavy loading and unloading workload, and the difficulty of installation at the construction site. The problem of high dynamic intensity and high safety risk

Method used

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  • Carbon dioxide low-pressure manifold picking tool and application and fracture method thereof
  • Carbon dioxide low-pressure manifold picking tool and application and fracture method thereof
  • Carbon dioxide low-pressure manifold picking tool and application and fracture method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] This embodiment provides a carbon dioxide low-pressure manifold skid, including a skid seat 13, a bracket 4 is provided on the skid seat 13, a main pipe 1 is fixed on the support 4, and the main pipe 1 is arranged on both sides along the axial direction. Each is provided with a plurality of suction ports 11 and discharge ports 12, and the suction ports 11 and discharge ports 12 are provided with control valves 3 and supporting plugs, and the axial ends 9 of the main pipe 1 are closed by unions and plugs .

[0029] This carbon dioxide low-pressure manifold skid realizes the modular installation of low-pressure blocks, which can facilitate liquid control. Multiple control valves 3 can realize different configurations and buffering methods of liquid carbon dioxide, so that the device can complete the alternate supply of liquid during fracturing construction.

[0030] When organizing construction on site, place the manifold skid in a suitable position to quickly and effici...

Embodiment 2

[0032] On the basis of Embodiment 1, this embodiment provides a carbon dioxide low-pressure manifold skid. The top of the main pipe 1 is provided with multiple safety take-off openings, and each take-off opening is equipped with a safety valve 8 for setting the take-off pressure.

[0033] The top of the main pipe 1 is provided with an emptying ball valve 6 close to the two ends 9 in the axial direction. The lower extension pipe of the emptying ball valve 6 is inserted into the bottom of the main pipe 1, and there is a gap between them. The purpose is to ensure that the CO in the manifold 2 able to be completely emptied.

[0034] The safety valve 8 and the emptying ball valve 6 are used to ensure that the pressure is within a safe range and to release deposited carbon dioxide after the construction is completed. Evacuation pipe 7 makes direction upwards when releasing carbon dioxide, avoids air current to injure people.

[0035] The device is convenient for hoisting, can simp...

Embodiment 3

[0037] On the basis of Embodiment 2, this embodiment provides a carbon dioxide low-pressure manifold skid, and the emptying ball valve 6 is connected with a thin-walled round pipe 14 . The thin-walled round tube 14 can reduce the emptying noise.

[0038] The axial ends 9 of the main pipe 1 are composed of a male union 2, an eccentric head and a female plug 10 connected in sequence.

[0039] The supporting plug is fixed on the main pipe 1 through a chain 19, and the control valve 3 is an acid-resistant stainless steel butterfly valve with a low pressure of 2-3 MPa.

[0040] Described thin-walled circular tube 14 comprises circular tube body 15, and one end of described circular tube body 15 is provided with outer circle step 16, and the outer diameter of this outer circle step 16 is greater than the outer diameter of round tube body 15 middle parts, and described outer circle step 16 and the round pipe body 15 are transitionally connected by an arc 17 of R50-R100, and the othe...

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Abstract

The invention provides a carbon dioxide low-pressure manifold picking tool and an application and fracture method thereof. The carbon dioxide low-pressure manifold picking tool comprises a picking seat, a support is arranged on the picking seat, a main pipe is fixedly arranged on the support, two axial sides of the main pipe are provided with a plurality of suction inlets and outlets, control valves and mating end caps are arranged at the suction inlets and the outlets, and two axial ends of the main pipe are sealed by a union and a plug. In carbon dioxide fracture construction organization, modular installation of a low-pressure block can be realized, hosting is facilitated, on-site construction pipeline connection modes can be simplified, messy low-pressure pipeline connection is improved, manpower waste is decreased, speed and efficiency are increased, and construction cycle is shortened. Besides, the picking tool is provided with a safety valve and an emptying ball valve, and noisegenerated by airflow is reduced by a thin-walled circular pipe in emptying. Total corrosion resistance, low-temperature resistance and pressure-bearing levels of the picking tool are higher than those of a conventional distributor, and safe, efficient and large-displacement liquid supply requirements are met.

Description

technical field [0001] The invention belongs to the technical field of fracturing equipment for oil and gas wells, and in particular relates to a carbon dioxide low pressure manifold skid, its application and a fracturing method. Background technique [0002] In recent years, carbon dioxide fracturing technology has been more and more respected by oil companies at home and abroad, not only because carbon dioxide carries sand into the formation, it will cause little damage to the formation, but also because carbon dioxide does not cause any pollution whether it is on the ground or underground oil and gas reservoirs . [0003] At present, my country's carbon dioxide fracturing technology is in its infancy. On-site low-pressure pipelines are directly connected to booster pump trucks or closed sand mixing devices by storage tanks. This leads to a limited number of connected storage tanks and messy pipelines. Experienced technology Personnel also need to install pressure relief v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
CPCE21B43/164E21B43/26
Inventor 钟新荣兰建平车昊阳詹勇郭春峰刘广春姚伟张铁军柴龙夏玉磊叶赛邓斌奇郑松柏舒刚王科萌
Owner BC P INC CHINA NAT PETROLEUM CORP
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