A kind of anti-deviation fast drilling tool assembly
A drilling tool assembly and drill bit technology, which is applied in directional drilling and other directions, can solve the problems of limited popularization and application, performance impact, and high cost, and achieve the effects of wide application range, stable performance, and simple structure
Active Publication Date: 2015-12-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
The application effect of these systems is good, but the cost in the use process is too high, and when the formation is high-temperature and high-pressure, its performance is affected, and its popularization and application are also limited
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[0021] Such as figure 1 As shown, the anti-deviation fast drilling tool assembly includes: drill bit 1, eccentric deflection lever structure pup joint 2, drill collar 3, centralizer 4; drill bit 1, eccentric deflection lever structure pup joint 2, drill collar 3, centralizer 4 connected by threads in turn. When in use, the drill bit 4 is located at the bottom of the well and is used for rock-breaking drilling; the eccentrically deflected lever structure nipple 2, drill collar 3, and centralizer 4 are combined to form a combined structure for changing the force and cutting state of the drill bit, thereby changing Drilling trend; the centralizer 4 is connected to the drill tool assembly on its upper part.
[0022] The drill bit 1 is evenly distributed with cutting teeth 11 on the diameter gauge part 12 of the drill bit blade, and the drill bit cutting teeth 11 are used to strengthen the lateral cutting ability of the drill bit 1 . When the drill bit is subjected to the same ma...
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The invention belongs to the field of petroleum engineering and particularly relates to a deviation-preventing and fast-drilling drilling assembly. The deviation-preventing and fast-drilling drilling assembly comprises a drill bit, an eccentric deviation lever structure pup joint, a drill collar and a centralizer. The drill bit, the eccentric deviation lever structure pup joint, the drill collar and the centralizer are sequentially connected through threads. The deviation-preventing and fast-drilling drilling assembly is simple in structure and stable in performance, and no risk in other aspects is caused to drilling operation in the using process; organic unity of push type deviation prevention and directional deviation prevention is achieved, and the deviation prevention effect is excellent; the deviation prevention effect is more obvious when bit pressure is high, the bit pressure can be released, performances are not subject to influences of shaft bottom conditions, and the deviation-preventing and fast-drilling drilling assembly is favorable for improvement of the drilling speed; and the deviation-preventing and fast-drilling drilling assembly not only can be used for deviation correction, but also can be normally used for vertical shaft drilling and is wide in applied range.
Description
technical field [0001] The invention belongs to the field of petroleum engineering, and in particular relates to a downhole drilling tool assembly in oil and natural gas drilling operations, in particular to an anti-deflection drilling tool assembly for fast drilling. Background technique [0002] In the process of drilling oil and gas wells, direct exploration wells in high and steep formations and directional drilling in diameter sections have been a technical problem that has plagued the drilling industry. Currently proposed well deviation control tools include conventional drilling tools and automatic vertical drilling systems. Conventional drilling tools mainly include tower drilling tools, pendulum drilling tools, full-hole drilling tools, off-axis drilling tools, etc. These drilling tools are also called passive anti-deviation tools. Fully meet the requirements of deep wells, complex wells, high-steep structures and high-dip formations, and some require the sacrifice...
Claims
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IPC IPC(8): E21B7/04
Inventor 刘永旺管志川
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)