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Composite impactor

A technology of impactor and axial impact, which is applied in earthwork drilling, driving devices for drilling in boreholes, drilling equipment, etc., and can solve problems such as stick-slip of the drill string system, reduced drilling efficiency, and low ROP. Achieve the effects of not being easy to fail, reducing stick-slip phenomenon, and increasing ROP

Active Publication Date: 2021-02-23
SOUTHWEST PETROLEUM UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In deep and ultra-deep well drilling operations, due to the influence of factors such as differences in formation drillability, strong wear resistance of rocks, high compressive strength and shear strength of rocks, the mechanical penetration rate is low during drilling, and the lengthened The drill string system is prone to stick-slip phenomenon, which reduces the efficiency of drilling operations
The existing downhole impact tools are basically a single axial impact or a single torsional impact, and the effect is average

Method used

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Examples

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing.

[0031] figure 1 A composite impactor according to one embodiment of the present invention is schematically shown. It should be noted that the accompanying drawings of the present invention apply it to oil drilling, and it is not limited to this application only. Take the application in oil drilling as an example below. The two ends of the composite impactor are connected by threads, which is convenient for disassembly and assembly; the axial impact part of the composite impactor includes the impact hammer 6 located inside the upper shell 9, the center tube 5 and the middle tube 7 for moving and reversing the hammer 6, The fixed block 3 inserted on the upper end of the intermediate tube 7, the adjustment screw 21 assembled on the upper casing 9, and the spring 4 located between the fixed block 3 and the hammer 6; the hammer 6 of the axial impact part reciprocates up and do...

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Abstract

The invention belongs to the technical field of petroleum drilling, and particularly relates to a composite impactor. According to the specific technical scheme, the composite impactor is characterized in that the two ends of the composite impactor are detachably connected with an upper drilling tool and a drill bit in a threaded mode respectively, the composite impactor comprises an axial impactpart, a torsional impact part and an auxiliary part, an impact hammer of the axial impact part axially impacts an upper shell under the combined action of a spring and high-pressure drilling fluid togenerate axial impact force, a pendulum bob of the torsional impact part impacts a lower shell in a torsional mode under the action of high-pressure drilling fluid to generate torsional impact force,a reversing switch and a central pipe are connected together in an inserted mode, and meanwhile reversing is conducted on torsional impact and axial impact respectively. According to the composite impactor, the impact hammer and the pendulum bob are pushed by the high-pressure drilling fluid to generate axial impact and torsional impact respectively, the mechanical drilling speed is effectively increased, the stick-slip phenomenon at a drill string system or the drill bit is reduced, and the composite impactor is stable and reliable in an underground complex and variable environment.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, and in particular relates to a composite impactor. Background technique [0002] At present, with the gradual depletion of land shallow oil and gas resources, the development of deep wells, ultra-deep wells and new oil and gas resources has gradually become a trend. In deep and ultra-deep well drilling operations, due to the influence of factors such as differences in formation drillability, strong wear resistance of rocks, high compressive strength and shear strength of rocks, the mechanical penetration rate is low during drilling, and the lengthened The drill string system is prone to stick-slip phenomenon, which reduces the efficiency of drilling operations. The existing downhole impact tools are basically a single axial impact or a single torsional impact, and the use effect is average. [0003] Therefore, how to simultaneously generate axial and torsional impacts to increase the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/16E21B4/14
CPCE21B4/16E21B4/14
Inventor 田家林胡志超葛桐旭杨琳邢春雨唐磊
Owner SOUTHWEST PETROLEUM UNIV
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