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While-drilling reamer for drilling and operation method

A reamer and drilling-while-drilling technology, which is applied to drill bits, earth-moving drilling, drilling equipment, etc., can solve the problems of large vibration, unreliable expansion and contraction of blades, and stuck blades.

Active Publication Date: 2021-01-22
BEIJING INST OF EXPLORATION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing movable reamer is often unreliable when the blade expands and contracts, the vibration is large during operation, the wellbore is irregular, and the blade is easily stuck during recovery, etc.

Method used

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  • While-drilling reamer for drilling and operation method
  • While-drilling reamer for drilling and operation method
  • While-drilling reamer for drilling and operation method

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] The embodiment of the present invention discloses a drill-while-drilling reamer, which includes an upper joint 1, a support pipe assembly, an upper piston outer tube 2, an upper piston 3, a movable blade mechanism, a lower piston 4, and a locking mechanism , ball catcher 5 and lower joint 6;

[0031] The support tube assembly includes a support outer tube 7 and a support inner tube 8 slidingly arranged in the support outer tube 7. One end of the support...

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Abstract

The invention discloses a while-drilling reamer for drilling and an operation method. The while-drilling reamer comprises an upper connector, a supporting pipe assembly, an upper piston outer pipe, anupper piston, a movable blade wing mechanism, a lower piston, a locking mechanism, a ball catcher and a lower connector; the supporting pipe assembly comprises a supporting outer pipe and a supporting inner pipe arranged in a second spring supporting outer pipe in a sliding mode; the movable blade wing mechanism comprises a drill bit blade wing and a connecting rod; the locking mechanism comprises a limiting outer pipe, a bayonet lock, a first spring and a threaded cap; one end of a second spring limiting outer pipe is connected with one end of the second spring supporting outer pipe, and theother end of the second spring limiting outer pipe is connected with a second spring lower connector; and a clamping groove matched with a second spring bayonet lock is formed in a piston rod of a second spring lower piston. The while-drilling reamer is used for expanding a specific stratum in a borehole in drilling, performing workover treatment after well completion or expanding a reservoir ofa production well, and the like, and needs to perform well bore structure transformation.

Description

technical field [0001] The invention relates to the technical field of drilling and reaming equipment, and more specifically relates to a drilling-while-drilling reamer and an operation method. Background technique [0002] The reamer while drilling is a downhole tool that can expand the wellbore while drilling downhole. This tool can change the structure of the well body, reduce the gap between the casing strings through reaming, increase the drilling speed of drilling, and effectively reduce the drilling cost; The diameter of the hole will cause problems such as stuck pipe and squeezed casing, which is very likely to cause serious drilling accidents. The use of downhole reamers while drilling can effectively solve complex drilling accidents caused by salt-gypsum layer creep and effectively protect casings. pipe to improve the safety of drilling; during cementing, through downhole reaming technology, without changing the size of the casing, the annular gap of the casing ca...

Claims

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Application Information

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IPC IPC(8): E21B10/32
CPCE21B10/322
Inventor 邓都都陈云龙蔡家品阮海龙赵义贾美玲刘协鲁李春梁涛刘海龙沈立娜吴海霞
Owner BEIJING INST OF EXPLORATION ENG
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