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Underground device for reaming while drilling

A reamer and drilling-while-drilling technology, which is applied to drill bits, earthwork drilling, drilling equipment, etc., can solve problems such as low reaming efficiency, poor work safety, and high service costs of reamers, so as to ensure system stability and work High stability, the effect of preventing falling to the bottom of the well

Active Publication Date: 2019-01-18
南通谐铭科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, eye reamers have disadvantages of high service costs, low reaming efficiency, and poor work safety. In order to improve the safety and stability of downhole reaming operations, it is an inevitable development direction to develop new reamers.

Method used

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  • Underground device for reaming while drilling
  • Underground device for reaming while drilling
  • Underground device for reaming while drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The present invention will be further described below in conjunction with accompanying drawing:

[0013] See attached figure 1 , a downhole reamer while drilling includes an upper joint 1, a body, and a lower joint 11. The upper joint 1 is connected to the upper end of the body through threads, and the lower end of the body is connected with a lower joint 11 through threads. The upper end of the outer cylinder 3 and the lower end of the upper joint 1 An upper anti-drop ring 2 is installed between them, and a lower anti-drop ring 10 is installed between the lower end of the outer cylinder 3 and the upper end of the lower joint 11; the body includes an outer cylinder 3, an upper end spring 4, an upper piston 5, a lower piston a6, Lower piston b7, pin a8, lower end spring 9, lower anti-drop ring 10, O-ring a12, bypass valve 13, indexing mechanism 14, O-ring b15, nozzle 16, O-ring c17, pin b18 , knife wing 19, O-shaped seal ring d20 and central tube 21, on the central tube...

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Abstract

The invention relates to an underground device for reaming while drilling. The underground device for reaming while drilling comprises an upper joint, a body and a lower joint. The upper joint is connected to the upper end of the body through a thread, the lower joint is connected to the lower end of the body through a thread, when a high-pressure drilling fluid enters the cavity between the upperend of an indexing mechanism and a lower piston b from a peripheral small hole formed in the lower portion of a central pipe, the indexing mechanism is started and moves downward under the pressure effect of the drilling fluid so that the drilling fluid can reach the lower end of an upper piston a from a peripheral small hole of the central pipe, push the upper piston a upward move and thus pusha tool blade to outwards rotate around a pin b, the tool blade is unfolded and then obtain an enough large torque under the rotating effect of a drill column, and accordingly reaming operation is performed. The underground device for reaming while drilling can perform reaming while drilling and improve the well drilling efficiency and is suitable for reaming operation carried out under the condition of well hole diameter reduction, well hole irregularity or narrow and small circumferential space of a lower casing pipe.

Description

technical field [0001] The invention relates to a downhole reamer while drilling for oil and gas exploitation, and is especially suitable for conditions such as borehole diameter shrinkage, borehole irregularity, or casing casing casing circumferential space narrow and the like. Background technique [0002] In the process of oil and gas development and drilling, the depth of drilling is gradually deepened, and drilling is faced with more and more complex well structures and stratum structures, and the problems encountered are becoming more and more complicated. Due to the instability of the wellbore wall and the compression of the formation, it is often encountered that the diameter of the wellbore is reduced, which makes it difficult to continue the drilling process and the shrinkage of the horizontal wellbore. Conventional methods can only perform long-term reaming operations during drilling or when tripping out to achieve the purpose of removing shrinkage and wall repair...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/32E21B7/28
CPCE21B7/28E21B10/322
Inventor 田家林胡学华杨琳何虹志杨应林李居瑞朱志
Owner 南通谐铭科技有限公司
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