Downhole yield increasing short section and oil and gas drilling yield increasing combined operation system and method

An oil and gas drilling and well drilling technology, which is applied in the field of oil and gas exploration, can solve the problems of low reliability of drilling and production stimulation, and achieve the effects of improving drilling efficiency, reducing fluid friction and improving efficiency

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a downhole stimulation nipple, oil and gas drilling and stimulation combined operation system and method to solve the problem of low drilling efficiency and low reliability of drilling and production stimulation in the prior art

Method used

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  • Downhole yield increasing short section and oil and gas drilling yield increasing combined operation system and method
  • Downhole yield increasing short section and oil and gas drilling yield increasing combined operation system and method
  • Downhole yield increasing short section and oil and gas drilling yield increasing combined operation system and method

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Embodiment 1

[0068] In order to solve the above-mentioned technical problems existing in the prior art, an embodiment of the present invention provides a downhole stimulation sub, which is applied to the downhole drilling stimulation sub-system in the oil and gas drilling stimulation system.

[0069] figure 2 It is a structural schematic diagram of an embodiment of the downhole stimulation sub of the present invention, image 3 for figure 2 The schematic diagram of the structure in the A-A direction, such as Figure 2-Figure 3 As shown, the downhole stimulation nozzle of this embodiment may include a housing 1, a radial jet channel 11, a high-pressure cutting nozzle 12 and a first medium axial channel M1.

[0070] In this embodiment, one end of the casing 1 is used to connect the coiled tubing in the downhole drilling and stimulation subsystem, and the other end of the casing 1 is used to connect the drill bit in the downhole drilling and stimulation subsystem. The radial jet channel ...

Embodiment 2

[0076] Such as figure 2 As shown, the valve body 3 of the downhole stimulation sub in this embodiment may include a limiting component 31 , an elastic component 32 and a sliding component 33 .

[0077] In this embodiment, the limiting component 31 is fixed on the housing 1 and is provided with a first opening; for example, the limiting component 31 can be fixed on the housing 1 through a bolt assembly. The limiting component 31 may adopt at least two "L" row limiting blocks, and there is a gap between two adjacent limiting blocks, and the gap between two adjacent limiting blocks may be used as the first opening. It is also possible to adopt a whole structure, and just open a hole in the middle.

[0078] One end of the elastic member 32 is located on the limiting member 31 and is provided with a second opening; in this embodiment, the elastic member 32 is preferably a spring, so that the central hole of the spring can be used as the second opening.

[0079]The sliding part 3...

Embodiment 3

[0089] In order to solve the above-mentioned technical problems existing in the prior art, an embodiment of the present invention provides an oil and gas drilling and production stimulation combined operation system.

[0090] Figure 5 It is a structural schematic diagram of an embodiment of the oil and gas drilling and production stimulation system embodiment of the present invention, as Figure 5 As shown, the oil and gas drilling and production stimulation system in this embodiment may include an uphole drilling control subsystem 100 and a downhole drilling and production stimulation system 101 .

[0091] The downhole drilling and stimulation combined operation subsystem 101 may include a coiled tubing 1011 , a drill bit 1012 and the downhole stimulation nipple 1013 of the above-mentioned embodiment.

[0092] The coiled tubing 1011 is provided with a composite cable connected with the above-mentioned well drilling control subsystem 100;

[0093] The drill bit 1012 is prov...

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Abstract

The invention discloses an underground stimulation pup joint and an oil and gas drilling stimulation combined operation system and method.The underground stimulation pup joint comprises a shell, a first medium axial channel, a radial jet flow channel formed in the shell and a high-pressure cutting nozzle arranged at the outer end of the radial jet flow channel; the valve body is arranged in the first medium axial channel, the motor driving mechanism corresponds to the valve body, the valve body is driven by the motor driving mechanism to act, so that the radial jet flow channel and the first medium axial channel are closed or communicated, and then switching between a high-pressure cutting nozzle and a rock breaking nozzle of a drill bit is completed; therefore, different operations can be carried out. By adopting the technology provided by the invention, the drilling efficiency and the reliability of drilling yield increase combination operation can be improved.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration, and in particular relates to an underground production stimulation nipple and an oil and gas drilling production stimulation combined system and method. Background technique [0002] my country is rich in low-grade resources with low permeability, accounting for more than 45%, which is the key field and direction of current oil and gas exploration and development. Compared with medium-high permeability oil and gas reservoirs, low-permeability and ultra-low-permeability oil and gas reservoirs have the characteristics of narrow pores, poor connectivity, and low permeability, and it is more difficult to realize economical and effective development. [0003] At present, the development of low-permeability and ultra-low-permeability oil and gas reservoirs generally adopts the combination of horizontal well drilling and staged fracturing, but there are still problems such as low recover...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/18E21B43/00E21B44/00E21B47/00
CPCE21B43/121E21B44/00E21B47/00E21B7/18
Inventor 耿黎东王敏生叶海超蒋海军光新军
Owner CHINA PETROLEUM & CHEM CORP
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