WO2020034349A1 - Outil de carottage de roche dure - Google Patents

Outil de carottage de roche dure Download PDF

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Publication number
WO2020034349A1
WO2020034349A1 PCT/CN2018/108970 CN2018108970W WO2020034349A1 WO 2020034349 A1 WO2020034349 A1 WO 2020034349A1 CN 2018108970 W CN2018108970 W CN 2018108970W WO 2020034349 A1 WO2020034349 A1 WO 2020034349A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill bit
stage blade
drilling tool
hard rock
rock core
Prior art date
Application number
PCT/CN2018/108970
Other languages
English (en)
Chinese (zh)
Inventor
谢和平
张茹
张志龙
陈领
高明忠
鲁义强
何志强
李聪
华夏
明传剑
陆彤
彭高友
Original Assignee
四川大学
深圳大学
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 四川大学, 深圳大学 filed Critical 四川大学
Publication of WO2020034349A1 publication Critical patent/WO2020034349A1/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
    • E21B10/02—Core bits
    • 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
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • 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
    • 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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors

Definitions

  • the invention relates to the technical field of core drilling equipment, in particular to a hard rock core drilling tool.
  • cores are important data for discovering oil and gas layers and studying formations, oil layers, reservoirs, caps, structures, etc. By observing and studying cores, you can directly understand the lithology and physical properties of underground rocks. And oily, gas, aquatic characteristics.
  • Coring is the use of special coring tools to pull underground rocks into the ground during drilling. This type of rock is called a core, which can be used to determine various properties of the rock and intuitively study the underground structure. And rock sedimentary environment, and understand the fluid properties. In the process of mineral exploration and development, it is necessary to carry out drilling according to the stratigraphic level and depth of the geological design, run core tools into the well, and drill out the rock samples.
  • the drilling tool is an indispensable tool for core extraction.
  • the existing core drills have a slower drilling speed and low core removal efficiency.
  • the core drill's blades have slow cooling speeds, fast tool wear, and the use of blades. Short life.
  • the invention aims to provide a hard rock core drilling tool, the drill bit of which has a secondary blade, which can increase the drilling speed and improve the coring efficiency; by setting a coolant circuit hole, the cooling blade can be accelerated and the service life of the blade can be extended.
  • a hard rock core drilling tool includes a hollow drill bit including a first stage blade for drilling and a second stage blade for reaming.
  • the drill bit includes an inner drill bit and an outer drill bit, the inner drill bit is installed in the outer drill bit, the first-stage blade is located at the lower end of the inner drill bit, and the second-stage blade is located on the outer wall of the outer drill bit.
  • the position of the outer drill bit corresponding to the first-stage blade has a first-stage blade avoidance gap, and the first-stage blade avoidance gap is opened at the front surface of the outer drill bit.
  • the hard rock core drilling tool further includes an outer core tube, the drill bit is installed at the lower end of the outer core tube, the outer core tube and the outer wall of the bit are provided with spiral grooves, the spiral groove on the drill bit and the spiral on the outer core tube The grooves are continuous.
  • three first-stage blades are provided at equal intervals in the circumferential direction.
  • three second-stage blades are provided at equal intervals in the circumferential direction.
  • a coolant circuit hole is provided at the first-stage blade and the second-stage blade on the drill bit.
  • the coolant circuit hole at the second-stage blade is a bar-shaped hole.
  • the coolant circuit hole at the first-stage blade is an arc-shaped hole, and the arc-shaped hole is opened at the front face of the drill.
  • a seal ring is provided on the inner wall of the drill bit, and a highly elastic hoop seal ring is used to realize the encapsulation of the rock core during the coring process, thereby achieving the isolation and quality assurance effects and achieving the goals of moisture retention and quality retention.
  • the drill is a PCD tool.
  • the present invention has the following beneficial effects:
  • the drill bit is divided into two grade blades. A small hole is first drilled by the lowermost blade, and then the hole is enlarged by the upper blade, which can increase the drilling speed and the core removal efficiency.
  • the carbide thin-lip drill is used. Cutting the rock formation, reducing the disturbance of the core formation process to ensure the core integrity and quality;
  • Through holes are set as coolant circuit holes in the blades. Coolant can be sprayed through the through holes to cool the blades, speed up the cooling speed of the blades, reduce the wear of the tools, and extend the life of the blades.
  • the outer wall of the outer core pipe is provided with a spiral groove continuous with the drill bit. As the outer core pipe is screwed into the rock formation, the outer core pipe creates a closed space for the coring tool, which can prevent the fidelity tank from being contaminated;
  • the inner wall of the drill bit is provided with a sealing ring.
  • the highly elastic annular sealing ring is used to achieve the encapsulation of the rock core during the core removal process, to achieve the isolation and quality assurance effect, and to achieve the goals of moisture retention and quality assurance.
  • Figure 1 is a schematic structural view of a drill bit
  • FIG. 2 is a schematic structural diagram of an outer drill body
  • FIG. 3 is a schematic structural diagram of an inner drilling cutter body
  • FIG. 4 is a schematic structural diagram when a drill bit is installed on an outer core tube
  • the hard rock core drilling tool disclosed in the present invention includes a hollow drill bit 1, and the drill bit 1 is a PCD cutter.
  • the drill bit 1 includes a first-stage blade 2 for drilling and a second-stage blade 3 for reaming.
  • the drill 1 includes an inner drill 11 and an outer drill 12.
  • the inner drill 11 includes a first-stage blade 2 and a hollow inner drill body 111. As shown in FIG. 3, the lower end of the inner drill body 111 is provided with a first-stage blade mounting groove 112 for installing the first-stage blade 2.
  • the first-stage blade installation groove 112 is opened at the lower end surface of the inner drill body 111.
  • the first stage blade mounting groove 112 on the body 111 is provided with a coolant circuit hole 6.
  • the coolant circuit hole 6 is an arc-shaped hole that is opened at the front face of the drill 1 and communicates with the first-stage blade mounting groove 112.
  • the inner drill body 111 is provided with three first-stage blade mounting grooves 112 at equal intervals in the circumferential direction, and each first-stage blade mounting groove 112 is provided with a coolant circuit hole 6 and each first-stage blade mounting groove 112 Each has a first-level blade 2 installed.
  • a sealing ring 8 is provided on the inner wall of the inner drill body 111, and a highly elastic annular sealing ring is used to realize the wrapping of the rock core during the core removal process, thereby achieving the isolation and quality assurance effect and achieving the goals of moisture retention and quality retention.
  • the outer drill bit 12 includes a second-stage blade 3 and a hollow outer drill body 121.
  • the outer wall of the second-stage blade 3 has a second-stage blade installation groove 122 for installing the second-stage blade 3
  • the second-stage blade installation groove 122 on the outer drill body 121 has a coolant circuit hole 6.
  • the coolant circuit hole 6 is a strip-shaped hole, and the strip-shaped hole communicates with the second-stage blade mounting groove 122.
  • the outer drill body 121 is provided with three second-stage blade mounting grooves 122 at equal intervals in the circumferential direction.
  • Each second-stage blade mounting groove 122 is provided with a coolant circuit hole 6 and each second-stage blade mounting groove 122.
  • the inner drill bit 11 is installed in the outer drill bit 12, and the outer drill body 121 has a first-stage blade avoidance gap 7 at a position corresponding to the first-stage blade 2.
  • the first-stage blade avoidance gap 7 is opened on the front surface of the outer drill bit 12.
  • the cutting edge of the first-stage blade 2 is exposed from the outer drill body 121 at a position where the first-stage blade avoids the notch 7.
  • the thickness of the blade in this embodiment is 3.2 mm.
  • the drill bit is divided into two-stage blades.
  • a small hole is first drilled by the first-stage blade 2 at the lower end, and then the hole is enlarged by the second-stage blade 3 above, which can increase the drilling speed.
  • Through-holes are provided as cooling fluid circuit holes 6 at the blade positions, and cooling fluid can be sprayed through the through-holes to cool the blades.
  • the invention uses a hard alloy sharp mouth thin lip drill bit to cut the rock formation, reduces the disturbance of the core formation to the formation, and ensures the integrity and quality of the coring.
  • the hard rock core drilling tool further includes an outer core tube 5.
  • the drill 1 is installed at the lower end of the outer core tube 5, and the upper end of the outer drill body 121 is connected to the lower end of the outer core tube 5.
  • the outer core pipe 5 and the outer wall of the outer drill body 121 are both provided with a spiral groove 4.
  • the spiral groove 4 on the outer drill body 121 is continuous with the spiral groove 4 on the outer core pipe 5.
  • An outer core tube 5 provided with a spiral groove 4 on the outer wall is equivalent to a spiral outer drill.
  • the seal ring 8 Package to prevent the fidelity compartment from being contaminated.

Landscapes

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

Abstract

La présente invention concerne un outil de carottage de roche dure, comprenant un tube carottier externe (5) et un trépan creux (1), le trépan (1) étant installé sur une extrémité inférieure du tube carottier externe (5), les parois externes du tube carottier externe (5) et le trépan (1) comportant chacun une rainure en spirale (4), et la rainure en spirale (4) sur le trépan (1) et la rainure en spirale (4) sur le tube carottier externe (5) étant continues ; le trépan (1) comprend un trépan interne (11) et un trépan externe (12), le trépan interne (11) est installé dans le trépan externe (12), une extrémité inférieure du trépan interne (11) comporte une lame de premier étage (2), une paroi externe du trépan externe (12) comporte une lame de second étage (3), et des trous d'un circuit de refroidissement (6) sont disposés au niveau de la lame de premier étage (2) et de la lame de second étage (3).
PCT/CN2018/108970 2018-08-13 2018-09-30 Outil de carottage de roche dure WO2020034349A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810917788.0A CN108930517B (zh) 2018-08-13 2018-08-13 硬岩取芯钻具
CN201810917788.0 2018-08-13

Publications (1)

Publication Number Publication Date
WO2020034349A1 true WO2020034349A1 (fr) 2020-02-20

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PCT/CN2018/108970 WO2020034349A1 (fr) 2018-08-13 2018-09-30 Outil de carottage de roche dure

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CN (1) CN108930517B (fr)
WO (1) WO2020034349A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109973035B (zh) * 2018-12-26 2024-04-12 深圳大学 岩样保真取芯系统
CN109973034B (zh) * 2018-12-26 2024-04-19 深圳大学 岩样原位保真取芯系统
CN110714720B (zh) * 2019-11-04 2020-11-24 重庆地质矿产研究院 一种页岩气开采勘测用钻孔装置
CN112112575B (zh) * 2020-09-17 2022-09-30 中煤科工集团西安研究院有限公司 一种适用于地面钻孔的碎软煤层密闭取芯钻头

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CN103097642A (zh) * 2010-09-13 2013-05-08 长年Tm公司 具有一体化扩孔器的孕镶钻头
WO2012115287A1 (fr) * 2011-02-21 2012-08-30 Ehwa Diamond Industrial Co., Ltd. Manchon aléseur pour exploitation minière
CN203614040U (zh) * 2013-12-25 2014-05-28 东北石油大学 一种取心钻头
CN203756038U (zh) * 2014-04-11 2014-08-06 西北综合勘察设计研究院 一种钻探用高采心率双管取心钻具
CN106948784A (zh) * 2017-03-28 2017-07-14 国家深海基地管理中心 潜水器用钴结壳取芯钻头
CN107916895A (zh) * 2017-12-25 2018-04-17 重庆九州探矿机械技术开发有限公司 一种多功能钻头

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Publication number Publication date
CN108930517A (zh) 2018-12-04
CN108930517B (zh) 2024-03-22

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