A Drilling System Based on Double-Wall Drill Rod
A double-walled drill pipe and drilling technology, which is applied to the direction of drill pipe, drilling equipment, and driving devices for drilling in boreholes, and can solve problems such as inability to change the diameter
Active Publication Date: 2019-11-05
CHINA PETROCHEMICAL CORP +3
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Problems solved by technology
When it is necessary to change the outer diameter of the variable diameter stabilizer, various remote control methods will have a certain impact on normal drilling, and it is impossible to change the diameter while drilling
Method used
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Embodiment Construction
[0021] The present invention will be further described below in conjunction with accompanying drawing:
[0022] Refer to attached figure 1 , a drilling system based on double-walled drill pipe includes a drill bit 15, a conventional drilling tool 14, a hydraulic tool 13, a double-walled drill pipe 9, a double-walled drill pipe collar 8, and a diversion pressurized piston 7 from bottom to top. , blowout preventer group 10, top drive adapter device 4 and top drive 2, and supporting mud tank 5, drilling pump 6, auxiliary pump 3, and hose 1.
[0023] Refer to attached figure 2 , the double-walled drill rod 9 is composed of an inner drill rod 91 and an outer drill rod 90, an annular gap A92 is formed between the inner drill rod 91 and the outer drill rod 90, and the channel A95 inside the inner drill rod is an axial through hole; the outer drill rod Threads are processed up and down at 90, the outer drill rods 90 are connected up and down through threads, and the inner drill rod...
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The invention discloses a drilling system based on a double-wall drill rod. The drilling system based on the double-wall drill rod comprises a drill bit, a conventional drill tool, a hydraulic-driving tool, the double-wall drill rod, a diversion pressing piston, a blowout preventer set, a top drive adapter device, a top driver, a slurry tank and a drilling pump. In the drilling process, the drilling pump drains drilling liquid, the drilling liquid sequentially passes through an upper annular space of the diversion pressing piston, a double-wall drill rod duct in the lower portion of the diversion pressing piston, the conventional drill tool and the drill bit, the drilling liquid is drained out of the drill bit and passes through a lower annular space of the diversion pressing piston, a double-wall drill rod duct in the upper portion of the diversion pressing piston, a duct of the top drive adapter device and the top drive by carrying rock fragments, and finally the drilling liquid returns to a vibrating screen through a water hose. The drilling system based on the double-wall drill rod has the advantages that the diversion pressing piston adheres to the double-wall drill rod, and the pressure difference generated by the upper annular space and the lower annular space can push the diversion pressing piston and the double-wall drill rod to apply downward pressure so as to apply drilling pressure on the drill bit; and through an independent hydraulic control channel from the mouth of a well to downhole tools, a control channel and a real-time continuous control method are provided for the downhole tools.
Description
technical field [0001] The invention relates to the technical field of petroleum drilling equipment, in particular to a drilling system based on a double-walled drill pipe. Background technique [0002] With the deepening of petroleum exploration and development, the proportion of directional wells, horizontal wells and extended reach wells is increasing. Long horizontal section drilling technology has been widely used at home and abroad, mainly due to its good input-output ratio. At present, the drilling cost of horizontal wells in foreign countries has dropped to 1.2 to 2.0 times that of vertical wells, while the output is 4 to 8 times that of vertical wells; foreign countries have drilled extended-reach wells with a horizontal displacement exceeding 10,000 meters, while domestic ones can only complete horizontal displacements Extended reach well of about 4000m. The following complex situations exist in the process of directional well and horizontal well drilling. One s...
Claims
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IPC IPC(8): E21B4/20E21B17/042E21B21/00
CPCE21B4/20E21B17/042E21B21/00
Inventor 朱焕刚曹强宋荣荣李建成赵绪龙苗智瑜孙宇赵鹏赵亚坤许强邓霖
Owner CHINA PETROCHEMICAL CORP