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Downhole self-priming particle jet drilling device based on Venturi effect

A Venturi effect, self-priming technology, applied in liquid/gas jet drilling, drilling equipment, drill bits, etc., can solve the problems of high drilling cost, short service life of drilling tools, slow drilling speed, etc., and achieve enhanced start-up and Effects of purification, increased ROP, and low manufacturing and use costs

Active Publication Date: 2020-09-15
NORTHEAST GASOLINEEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of drilling deep wells and hard formations, there are generally a series of problems in oilfields at home and abroad, such as slow drilling speed, short service life of drilling tools, long drilling cycle, and high drilling costs, which affect the overall economic benefits of exploration and development. Therefore, research on new efficient drilling methods for deep wells and hard formations has become an important research direction for oil and gas drilling, and plays an important role in the efficient acquisition of formation oil and gas resources

Method used

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  • Downhole self-priming particle jet drilling device based on Venturi effect
  • Downhole self-priming particle jet drilling device based on Venturi effect
  • Downhole self-priming particle jet drilling device based on Venturi effect

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the present invention will be further described:

[0022] combine figure 1 , figure 2 , image 3 , Figure 4 As shown, this downhole self-priming particle jet drilling device based on the Venturi effect includes an upper joint 1, a nozzle 2, a liquid inlet chamber 3, a throat pipe 4, a diffuser pipe 5, and a lower joint 6. The upper end of the liquid inlet chamber 3 has an inner Thread 12, threaded with the upper joint 1, the inner cavity of the upper joint 1 is composed of the horn section 7 and the nozzle section, the outer part of the corresponding upper joint of the nozzle section is a reduced diameter section, the nozzle section is an equal diameter section, and the nozzle 2 is threaded with the nozzle section , the nozzle 2 and the nozzle section extend into the liquid inlet chamber 3, and the flow rate of the inflowing liquid can be changed by adjusting the size of the nozzle 2; the liquid inlet chamber 3 has tw...

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Abstract

The invention relates to a downhole self-priming particle jet drilling device based on the Venturi effect. The lower joint, the upper end of the liquid inlet chamber is threadedly connected with the upper joint, the inner cavity of the upper joint is composed of a horn section and a nozzle section, the outer part of the upper joint corresponding to the nozzle section is a reduced diameter section, the nozzle section is an equal diameter section, and the nozzle and the nozzle section are threadedly connected , the nozzle and the nozzle section extend into the liquid inlet chamber, the upper channel of the nozzle is a horn channel, the lower channel is a cylindrical channel, and the liquid inlet chamber has a liquid inlet hole; The throat pipe is arranged on a coaxial line, and the lower end of the diffusion pipe is connected with the lower joint. The invention can take the cuttings sucked from the annular space as impact particles, greatly improve the mechanical drilling speed, is suitable for the deep hard formation, and can effectively improve the rock breaking speed.

Description

Technical field: [0001] The invention relates to a drilling device used in the fields of petroleum engineering, mining engineering, geotechnical engineering, etc., and specifically relates to an underground self-priming particle jet drilling device based on the Venturi effect. Background technique: [0002] With the continuous depletion of shallow oil and gas resources in our country, the current focus of oil and gas exploration and development has shifted to deep hard formations and oil and gas fields under complex geological conditions. During the drilling process, the hardness and drilling difficulty of deep well formations are increasing, so how to increase the drilling speed in hard formations has become one of the recognized worldwide problems. In the process of drilling deep wells and hard formations, there are generally a series of problems in oilfields at home and abroad, such as slow drilling speed, short service life of drilling tools, long drilling cycle, and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/18E21B10/60E21B10/61
CPCE21B7/18E21B10/60E21B10/61
Inventor 李玮李世昌孙玉学张继红赵健吴红军
Owner NORTHEAST GASOLINEEUM UNIV
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