WO2020062741A1 - Trépan composite efficace approprié pour une strate de puits profond difficile à forer - Google Patents

Trépan composite efficace approprié pour une strate de puits profond difficile à forer Download PDF

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Publication number
WO2020062741A1
WO2020062741A1 PCT/CN2019/072903 CN2019072903W WO2020062741A1 WO 2020062741 A1 WO2020062741 A1 WO 2020062741A1 CN 2019072903 W CN2019072903 W CN 2019072903W WO 2020062741 A1 WO2020062741 A1 WO 2020062741A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill bit
nozzle
drill
fixed
crown
Prior art date
Application number
PCT/CN2019/072903
Other languages
English (en)
Chinese (zh)
Inventor
刘清友
曾松
毛良杰
王国荣
Original Assignee
西南石油大学
成都理工大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 西南石油大学, 成都理工大学 filed Critical 西南石油大学
Priority to CA3050791A priority Critical patent/CA3050791C/fr
Publication of WO2020062741A1 publication Critical patent/WO2020062741A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids

Definitions

  • the invention relates to the technical field of a PDC speed-up bit structure, in particular to a high-efficiency composite bit for deep well difficult to drill formations.
  • DC bit and diamond bit are more and more widely used in petroleum and geological drilling. It can obtain good use effect and good economic benefits in hard formations, and has been widely valued by the petroleum and geological circles.
  • the design of conventional PDC and diamond drills is based on the principle of balanced design, and crown shapes such as deep cones and double cones are used as passive anti-tilt technology. They are applied to the design and play a certain centering and stabilizing role.
  • the PDC bit is mainly composed of a bit body (matrix), PDC cutting teeth, a nozzle, a gauge material, and a connecting body.
  • the PDC cutting teeth are used to cut the ground to achieve drilling.
  • the nozzle is a hydraulic channel between the inner cavity of the bit and the outside.
  • the main role of the nozzle is to clean the bottom of the well, to remove rock cuttings from the bottom of the well, to prevent the mud bit of the drill bit, to reduce repeated cutting, and to improve the efficiency of rock breaking.
  • the high-speed rotating bit body drives the PDC cutting teeth to rotate at high speed.
  • the PDC cutting teeth cut hard formations, while the fluid ejected from the nozzles expels debris from the well.
  • the purpose of the present invention is to overcome the shortcomings of the prior art, and provide an efficient compound formation of deep well difficult to drill formations with compact structure, improved rock breaking efficiency, prolonged PDC cutting tooth life, avoiding nozzles blocked by rocks or debris, and low manufacturing cost. drill.
  • an efficient composite drill bit in deep well difficult to drill formations comprising a drill bit body, a roller cone and a nozzle anti-blocking mechanism, a fluid cavity is provided in the drill bit body, and a bottom of the drill body is provided with A crown, a cone drill is fixed on the bottom surface of the crown and located at the center thereof; a plurality of nozzles distributed around the cone drill are provided on the bottom surface of the crown, and each nozzle is in communication with the fluid cavity A plurality of main blades are fixed on the bottom surface of the crown and in the circumferential direction of the drill body, and a secondary blade is fixed between two adjacent main blades; There are a plurality of PDC cutting teeth, and a roller is also fixed on the main blade.
  • the roller includes a cone fixed on the top surface of the main blade.
  • the outer surface of the cone is sequentially fixed from the small end to the large end.
  • a circle of insert teeth, disc teeth and milling teeth are provided, and the exposure heights of the insert teeth, disc teeth and milling teeth are greater than the exposure height of the PDC cutting teeth;
  • a fluid cavity is arranged above each nozzle Nozzle anti-blocking mechanism in body, nozzle anti-blocking mechanism package Hollow steel pipe, discharge plate, push plate, spring and plug, the plug is fixed in the nozzle, a guide hole is opened in the plug, and a hollow steel pipe that can move up and down is installed in the guide hole, and the upper end of the hollow steel pipe extends
  • a push plate is welded in the fluid cavity, and the push plate is located in the fluid cavity, the lower end portion of the hollow steel pipe extends into the nozzle, and a discharge plate is welded outside the extension end, and the discharge plate is located in the nozzle,
  • a spring is also sleeved on
  • the auxiliary blade is fixed on the bottom surface of the crown, and the auxiliary blade and the main blade are welded together.
  • the main blades are evenly distributed on the crown.
  • the crown includes at least three main blade wings.
  • the discharge plate is arranged parallel to the push plate.
  • the hollow steel pipe is arranged parallel to the axis of the drill body.
  • An internal thread is provided in the nozzle, and an external thread is provided on the outside of the plug.
  • the external thread and the internal thread of the plug are connected and fixed on the nozzle.
  • the cross section of the roller is triangular, semi-circular, trapezoidal or wedge-shaped.
  • the invention has the following advantages: the invention has a compact structure, improves rock breaking efficiency, prolongs the service life of PDC cutting teeth, prevents the nozzle from being blocked by rocks or debris, and has low manufacturing cost.
  • Figure 1 is a half cross-sectional view of the present invention
  • Figure 2 is a bottom view of Figure 1;
  • FIG. 3 is a schematic cross-sectional view of a roller
  • FIG. 4 is a partially enlarged view of part I in FIG. 1;
  • a high-efficiency composite drill bit in deep well difficult to drill formations includes a drill bit body 1, a roller 2 and a nozzle blocking mechanism.
  • the drill bit body 1 is provided with a fluid cavity 3, and the drill bit body 1
  • a crown portion 4 is provided at the bottom, and a cone drill bit 5 is fixed on the bottom surface of the crown portion 4 and located at the center thereof.
  • the bottom surface of the crown portion 4 is provided with a plurality of nozzles 6 distributed around the cone drill bit 5, Each nozzle 6 is in communication with the fluid cavity 3, and a plurality of main blades 7 are fixed on the bottom surface of the crown 4 and along the circumferential direction of the drill body 1.
  • the main blades 7 are evenly distributed in this embodiment.
  • the crown 4 includes at least three main blades 7, and the auxiliary blades 8 are fixed between two adjacent main blades 7. A plurality of the main blades 7 are fixed along the length direction.
  • the main blade wing 7 is also fixed with a roller 2.
  • the cross section of the roller 2 is triangular, semi-circular, trapezoidal, or wedge-shaped.
  • the roller 2 includes a roller 2 fixed on the top surface of the main blade 7.
  • the dew-height of the teeth 13 is greater than the dew-height of the PDC cutting teeth 9; a nozzle anti-blocking mechanism located in the fluid cavity 3 is provided above each of the nozzles 6.
  • the nozzle anti-blocking mechanism includes a hollow steel pipe 14, a discharge plate 15, a push plate 16, a spring 17, and a plug 18.
  • the plug 18 is fixed in the nozzle 6, and a guide hole 19 and a guide hole 19 are opened in the plug 18.
  • a hollow steel pipe 14 that can be moved up and down is installed in the inner slide.
  • the hollow steel pipe 14 is arranged parallel to the axis of the drill body 1.
  • the upper end of the hollow steel pipe 14 extends into the fluid cavity 3, and a push plate 16 is welded at the extended end.
  • the plate 16 is located in the fluid cavity 3, and the lower end portion of the hollow steel pipe 14 extends into the nozzle 6, and the outside of the extended end is welded with a discharge plate 15, the discharge plate 15 is arranged parallel to the push plate 16, and the discharge plate 15 is located at the nozzle
  • a spring 17 is also sleeved on the hollow steel pipe 14. One end of the spring 17 is fixed on the bottom surface of the fluid cavity 3, and the other end of the spring 17 is fixed on the bottom surface of the push plate 16.
  • the auxiliary blade 8 is fixed on the bottom surface of the crown 4, and the auxiliary blade 8 and the main blade 7 are welded together.
  • the nozzle 6 is provided with an internal thread
  • the plug 18 is provided with an external thread. The external thread and the internal thread of the plug 18 are connected and fixed on the nozzle 6.
  • the worker operates a high-pressure pump on the ground, and pumps high-pressure fluid into the fluid cavity 3 through the high-pressure pump. Some of the high-pressure fluid hits the top surface of the push plate 16, and another part of the high-pressure fluid passes directly through the hollow.
  • the inner cavity of the steel pipe 14 and the nozzle 6 finally act on the bottom of the well, and the fluid reduces the temperature of the PDC cutting teeth to ensure its normal operation. If the debris generated during drilling blocks the nozzle 6, the high-pressure fluid hitting the top surface of the push plate 16 exerts a downward force on the push plate 16 to drive the hollow steel pipe 14 to move downward along the guide hole 19 and compress at the same time
  • the spring 17 further drives the unloading plate 15 to move downwards.
  • the unloading plate 15 discharges the debris stuck in the nozzle 6 downward to the outside of the nozzle 6 and blocks the lower port of the nozzle 6 to prevent the debris from entering into it. Effectively prevents nozzle blockage, thereby ensuring that the PDC cutting teeth can be continuously cooled and further ensuring the smooth progress of rock breaking.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un trépan composite efficace approprié pour une strate de puits profond difficile à forer, comprenant un corps de trépan (1), un cône (2) et un mécanisme anti-blocage de buse. Une cavité de fluide (3) est formée dans le corps de trépan (1). Une couronne (4) est disposée en bas du corps de trépan (1). Un trépan conique (5) est disposé à demeure au centre de la surface inférieure de la couronne (4). Une pluralité de buses (6) réparties autour du trépan conique (5) sont formées sur la surface inférieure de la couronne (4). Chaque buse (6) est en communication avec la cavité de fluide (3). Une pluralité de pales principales (7) sont disposées à demeure sur la surface inférieure de la couronne (4) dans la direction circonférentielle du corps de trépan (1). Une lame auxiliaire (8) est disposée à demeure entre deux lames principales adjacentes (7). Le trépan composite est de structure compacte et a un faible coût de fabrication, et peut améliorer l'efficacité de rupture de roche, prolonger la durée de vie de dents de coupe PDC, et éviter que la buse ne soit bloquée par la roche ou des débris.
PCT/CN2019/072903 2018-09-26 2019-01-24 Trépan composite efficace approprié pour une strate de puits profond difficile à forer WO2020062741A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA3050791A CA3050791C (fr) 2018-09-26 2019-01-24 Foret mixte haute efficacite destine a une formation difficile a forer dans un puits profond

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811126683.XA CN109057715A (zh) 2018-09-26 2018-09-26 一种切削硬质地层的复合pdc提速钻头
CN201811126683.X 2018-09-26

Publications (1)

Publication Number Publication Date
WO2020062741A1 true WO2020062741A1 (fr) 2020-04-02

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PCT/CN2019/072903 WO2020062741A1 (fr) 2018-09-26 2019-01-24 Trépan composite efficace approprié pour une strate de puits profond difficile à forer

Country Status (2)

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CN (1) CN109057715A (fr)
WO (1) WO2020062741A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109057715A (zh) * 2018-09-26 2018-12-21 西南石油大学 一种切削硬质地层的复合pdc提速钻头
CN110374517A (zh) * 2019-06-17 2019-10-25 河北锐石钻头制造有限公司 一种新型防堵pdc钻头
CN111608589B (zh) * 2020-05-19 2022-09-09 中国石油化工股份有限公司 一种井底应力诱导卸荷钻头及其提高钻井速度方法
CN111894466B (zh) * 2020-07-20 2021-03-05 盐城市荣嘉机械制造有限公司 一种石油勘探开采的牙轮钻头
CN113882809B (zh) * 2021-12-06 2022-02-08 山东金锐石油装备有限公司 一种具有可伸缩的切削副齿组件的pdc钻头及使用方法

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CN203783470U (zh) * 2014-04-29 2014-08-20 大庆市联盛科技有限公司 一种新型石油勘探pdc钻头
CN203835276U (zh) * 2014-05-04 2014-09-17 胜利油田盛辉石油技术开发有限责任公司 一种pdc钻头
CN205063831U (zh) * 2015-10-16 2016-03-02 贾建伟 一种防堵金刚石复合片钻头
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CN109057715A (zh) * 2018-09-26 2018-12-21 西南石油大学 一种切削硬质地层的复合pdc提速钻头

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CN2421403Y (zh) * 1999-12-24 2001-02-28 西南石油学院 复合齿形牙轮钻头
US20110162893A1 (en) * 2010-01-05 2011-07-07 Smith International, Inc. High-shear roller cone and pdc hybrid bit
CN201908577U (zh) * 2010-11-02 2011-07-27 武汉亿斯达工具有限公司 一种防堵型金刚石钻头
CN202055758U (zh) * 2011-05-24 2011-11-30 岳红 钻头喷嘴防堵器
CN102434105A (zh) * 2011-11-30 2012-05-02 四川深远石油钻井工具有限公司 具有旋切破岩功能的复合钻头
CN202767886U (zh) * 2012-07-25 2013-03-06 湖南天鹰科技集团有限公司 用于牙轮钻头可换喷嘴芯的喷嘴座
CN203783470U (zh) * 2014-04-29 2014-08-20 大庆市联盛科技有限公司 一种新型石油勘探pdc钻头
CN203835276U (zh) * 2014-05-04 2014-09-17 胜利油田盛辉石油技术开发有限责任公司 一种pdc钻头
CN205063831U (zh) * 2015-10-16 2016-03-02 贾建伟 一种防堵金刚石复合片钻头
CN107606159A (zh) * 2017-09-21 2018-01-19 四川川石金刚石钻头有限公司 一种pdc钻头水眼防堵结构
CN109057715A (zh) * 2018-09-26 2018-12-21 西南石油大学 一种切削硬质地层的复合pdc提速钻头

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