A drilling tool and its drilling method

A drilling tool and drilling technology, which is applied to drilling equipment, wellbore/well components, drilling with liquid/gas jets, etc., can solve problems such as drag pressure in extended-reach wells, and achieve large-displacement circular well washing, The effect of increasing the drilling pressure, increasing the water power and the impact force of the pulsed cavitation jet

Active Publication Date: 2018-08-28
CHINA PETROCHEMICAL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing tools all use one of the speed-up mechanisms, and cannot solve the dragging phenomenon in extended-reach wells

Method used

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  • A drilling tool and its drilling method
  • A drilling tool and its drilling method

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Embodiment Construction

[0014] Attached below figure 1 , attached figure 2 The present invention is further described:

[0015] attached figure 1 And attached figure 2 Among them, a drilling tool includes a spline outer cylinder 4, a spline mandrel 5, an anti-drop cylinder 7, a pulse generator 8, and a drill bit 9. The spline outer cylinder 4 has a cylindrical structure, the upper end and the lower end are respectively processed with threads, and the inside is processed with an internal spline, and a bypass channel 3 passing through the wall of the spline outer cylinder 4 is processed between the internal spline and the upper end thread; The anti-falling cylinder 7 has a cylindrical structure, the upper end is processed with threads, and the lower end has a step protruding toward the inside of the anti-falling cylinder 7; the spline mandrel 5 is externally processed with external splines, and the lower part is processed with threads to connect with the pulse generator 8. There is an outer conve...

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Abstract

The invention discloses a well-drilling tool and a well-drilling method thereof. The well-drilling tool comprises a spline outer drum, a spline mandrel, an anti-dropping drum, an impulse generator and a drill bit. A bypass drill way communicating the outer drum of the spline outer drum is machined on the spline outer drum. The lower part of the spline mandrel is connected with the impulse generator. The lower end of the impulse generator is connected with the drill bit. The spline mandrel is connected with the spline outer drum via a spline so that torque transfer and up-down sliding motion can be achieved. The spline mandrel drives the bypass drill way to move up and down along the spline outer drum. Therefore, a switch of a bypass port is controlled. The well-drilling tool and the well-drilling method thereof have following beneficial effects: the well-drilling tool is simple in structure and helps achieve communication and separation of annular space inside and outside of a drill column; small-displacement well-drilling and large-displacement well-washing are achieved; by fully utilizing impact force of pulse cavitating jet, drilling pressure is increased by fulfilling the function of hydraulic pressurization; and mechanical drilling speed for well-drilling is improved.

Description

technical field [0001] The invention relates to the field of drilling tools, in particular to a drilling tool and a drilling method thereof. Background technique [0002] Drilling engineering is a project with large investment and high risk in the development of oil and gas reservoirs, and its cost accounts for more than 50% of the cost of exploration and development. Rock breaking technology is the core content of oil and gas drilling technology. The efficiency of rock breaking directly determines the drilling speed and cost, and also determines the economic benefits of drilling engineering. With the deepening of my country's oil and gas exploration and development, the number of deep wells and ultra-deep wells is increasing. When the well depth increases, the problems of low drilling speed, high cost and long cycle are very prominent, which seriously affect the exploration and development speed of the entire oil and gas field. Especially in deep formations, the mechanica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/18E21B21/00E21B17/02
Inventor 孙宇朱焕刚李建成杨德京宋荣荣李晓万秀琦韩玉华段光辉赵亚坤邓霖许强
Owner CHINA PETROCHEMICAL CORP
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