WO2020034350A1 - 岩芯钻取工具 - Google Patents

岩芯钻取工具 Download PDF

Info

Publication number
WO2020034350A1
WO2020034350A1 PCT/CN2018/108971 CN2018108971W WO2020034350A1 WO 2020034350 A1 WO2020034350 A1 WO 2020034350A1 CN 2018108971 W CN2018108971 W CN 2018108971W WO 2020034350 A1 WO2020034350 A1 WO 2020034350A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
drill bit
drilling tool
clamping jaws
stage blade
Prior art date
Application number
PCT/CN2018/108971
Other languages
English (en)
French (fr)
Inventor
谢和平
高明忠
张志龙
陈领
张茹
鲁义强
何志强
李聪
华夏
明传剑
彭高友
陆彤
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 WO2020034350A1 publication Critical patent/WO2020034350A1/zh

Links

Images

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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers

Definitions

  • the invention relates to the technical field of core drilling equipment, in particular to a 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.
  • Coring tools include coring drills and core catchers. After the coring drill is cut into the formation, the core is retained in the inner cylinder by the core catcher.
  • the existing core catcher can only take soft rocks and it is difficult to take hard rocks.
  • the blades of the existing core drilling tools have a slow cooling speed, fast tool wear, and short blade life.
  • the present invention aims to provide a core drilling tool.
  • the core catcher includes claws which are gathered upwards and inwards to facilitate the extraction of hard rocks.
  • a core drilling tool includes a core drilling tool, a core catcher and an inner core pipe, the core drilling tool comprises an outer core pipe and a hollow drill bit, and the drill bit is connected to the lower end of the outer core pipe;
  • the core catcher includes a ring-shaped base body and a plurality of claws.
  • the ring-shaped base body is coaxially installed on the inner wall of the lower end of the inner core tube.
  • the claws are evenly arranged on the ring-shaped base body.
  • the lower end of the claw is connected to the ring-shaped base body and the upper end of the claw is inward. Collapse; the lower end of the inner core tube extends to the bottom of the outer core tube, and the inner core tube and the outer core tube are clearance-fitted.
  • the drill bit includes 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 side wall of the outer drill bit.
  • three first-stage blades are provided at equal intervals in the circumferential direction, and 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.
  • outer core pipe and the outer wall of the drill are both provided with a spiral groove, and the spiral groove on the drill is continuous with the spiral groove on the outer core pipe.
  • the claw includes a vertical arm and an inclined arm manufactured integrally, the lower end of the vertical arm is connected to the annular base, the upper end of the vertical arm is connected to the lower end of the inclined arm, the upper end of the inclined arm is a free end, and the inclined arm is from below Tilt up and in.
  • the inclination angle of the inclined arm is 60 °.
  • the inner wall of the inner core tube is coated with graphene.
  • the graphene coating on the inner wall can reduce the friction coefficient of the core moving in the core tube, reduce the heat transfer and loss, and reduce the influence of external radiation on the core, improving the fidelity quality.
  • 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 claw and the annular base body are integrally manufactured, the annular base body is sheathed with an annular sleeve, and the annular base body is fixedly connected to the annular sleeve; the inner wall of the inner core tube has an annular groove adapted to the annular sleeve, and the annular sleeve is set in the annular groove.
  • the present invention has the following beneficial effects:
  • the mechanical jaws designed upward and inward are designed in the present invention. When the jaws are down, the jaws are easily stretched by the core, so that the core enters the inner core tube. When the jaws are upward, the jaws are difficult. Supported by the core, because the core cannot resist the large tensile force and the clamping action of the claw, the core is broken at the claw, and the fractured core will continue to go up with the claw to remain in the inner cylinder;
  • the drill bit is divided into two-level 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.
  • through holes are provided in the blade parts as coolant circuit holes, and the coolant can be sprayed out through the through holes to cool the blade, accelerate the cooling speed of the blade, reduce the wear of the tool, and extend the life of the blade;
  • 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 to prevent the fidelity tank from being contaminated;
  • the inner wall of the inner core tube is coated with graphene, which can reduce the friction coefficient of the core moving in the core tube, reduce the heat transfer and loss, and reduce the impact of external radiation on the core and improve the fidelity quality.
  • FIG. 1 is a schematic structural diagram of the present invention
  • FIG. 2 is a schematic structural diagram of an inner core tube
  • FIG. 3 is an enlarged view at A in FIG. 2; FIG.
  • FIG. 4 is a three-dimensional perspective view of a core catcher
  • Figure 5 is a sectional view of a core catcher
  • FIG. 6 is a schematic structural diagram of a core drilling tool
  • Figure 7 is a schematic structural view of a drill bit
  • FIG. 8 is a schematic structural diagram of an outer drilling cutter body
  • FIG. 9 is a schematic structural diagram of an inner drilling cutter body
  • the core drilling tool disclosed in the present invention includes a core drilling tool, a core catcher 1 and an inner core tube 2.
  • the core drilling tool includes an outer core tube 3 and a hollow drill bit 4. 4 is connected to the lower end of the outer core tube 3.
  • the core catcher 1 is provided on the inner wall of the lower end of the inner core tube 2.
  • the lower end of the inner core tube 2 extends to the bottom of the outer core tube 3 and fits with the outer core tube 3.
  • the core catcher 1 includes a ring-shaped base 11 and a plurality of claws 12.
  • the claws 12 are evenly disposed on the ring-shaped base 11.
  • the lower end of the claw 12 is connected to the ring-shaped base 11, and the upper end of the claw 12 faces inward. Collapse.
  • the number of the claws 12 can be set as required, and is not limited to the above number.
  • the claw 12 includes a vertical arm 121 and an inclined arm 122 which are integrally manufactured.
  • the lower end of the vertical arm 121 is connected to the annular base 11, the upper end of the vertical arm 121 is connected to the lower end of the inclined arm 122, and the upper end of the inclined arm 122 is a free end.
  • the arm 122 is inclined from the bottom up to the inside, and the inclination of the inclined arm 122 can be adjusted as required.
  • the inclination angle of the inclined arm 122 is 60 °, and the width of the claw 12 gradually decreases from the bottom to the top.
  • the thickness of the claw 12 is equal to the thickness of the annular base body 11, and the claw 12 and the annular base body 11 are manufactured integrally.
  • the annular base body 11 is provided with an annular sleeve 7, and the annular base body 11 is fixedly connected to the annular sleeve 7.
  • the inner wall of the inner core tube 2 is coated with graphene.
  • the inner core tube 2 includes a core sleeve 21 and a core sleeve 22.
  • the upper end of the core sleeve 22 is sleeved and fixed at the lower end of the core sleeve 21.
  • the inner wall of the core sleeve 22 is adapted to the annular sleeve 7.
  • the annular groove 7 is installed in the annular groove 23 with the free end of the claw 12 facing upward.
  • the free end of the claw 12 faces upward and is folded inward.
  • the drill 4 is a PCD tool. As shown in FIGS. 6 and 7, the drill 4 includes an inner drill 41 and an outer drill 42.
  • the inner drill 41 includes a first-stage blade 411 and a hollow inner drill body 412.
  • the lower end of the inner drill body 412 has a first-stage blade mounting groove 413 for installing the first-stage blade 411.
  • the first-stage blade installation groove 413 is opened at the lower end surface of the inner drill body 412.
  • the body 412 is provided with a coolant circuit hole 5 at the first-stage blade mounting groove 413.
  • the coolant circuit hole 5 is an arc-shaped hole that is opened at the front end surface of the drill 4 and communicates with the first-stage blade mounting groove 413.
  • the inner drill body 412 is provided with three first-stage blade installation grooves 413 at equal intervals in the circumferential direction, and each first-stage blade installation groove 413 is provided with a coolant circuit hole 5 and each first-stage blade installation groove 413 A first-stage blade 411 is installed in each of them.
  • the outer drill bit 42 includes a second-stage blade 421 and a hollow outer drill body 422.
  • the outer wall of the second-stage blade 421 has a second-stage blade installation groove 423 for installing the second-stage blade 421, and the second-stage blade installation groove 423 on the outer drill body 422 has a coolant circuit hole 5.
  • the coolant circuit hole 5 is a strip-shaped hole, and the strip-shaped hole communicates with the second-stage blade mounting groove 423.
  • the outer drill body 422 is provided with three second-stage blade mounting grooves 423 at equal intervals in the circumferential direction. Each second-stage blade mounting groove 423 is provided with a coolant circuit hole 5 and each second-stage blade mounting groove 423.
  • a second-stage blade 421 is installed in each of them.
  • the inner drill 41 is installed in the outer drill 42.
  • the outer drill body 422 has a first-stage blade avoidance gap 424 at a position corresponding to the first-stage blade 411.
  • the first-stage blade avoidance gap 424 opens at the front surface of the outer drill 42.
  • the cutting edge of the first stage blade 411 is exposed from the outer drill body 422 from the first stage blade avoidance gap 424.
  • a sealing ring 8 is provided on the inner wall of the inner drill body 412, and the sealing ring 8 is located above the first-stage blade 411.
  • the highly elastic annular sealing ring can be used to wrap the rock core during the core removal process to achieve the isolation and quality assurance effect and achieve moisture retention. 2. Shelf life goal.
  • the drill bit is divided into two-level blades.
  • a small hole is first drilled by the first-level blade 411 at the lower end, and then the hole is enlarged by the second-level blade 421 above, which can increase the drilling speed.
  • Through-holes are provided in the blade parts as the cooling liquid circuit holes 5, and the cooling liquid 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.
  • spiral grooves 6 are provided on the outer wall of the outer core pipe 3 and the outer drill body 422.
  • the spiral groove 6 on the outer drill body 422 is continuous with the spiral groove 6 on the outer core pipe 3.
  • the outer core tube 3 with a spiral groove 6 on the outer wall is equivalent to a spiral outer drill.
  • the sealing ring 8 Package to prevent the fidelity compartment from being contaminated.
  • the core enters the inner core tube 2 and passes through the middle of the core catcher 1.
  • the claw 12 is held open; the drilling is stopped Later, when pulling upwards, the claw 12 moves upward with the inner core tube 2 because the free end of the claw 12 is retracted. At this time, the claw 12 is difficult to be opened by the core. Because the core cannot resist a large pulling force and the card The free end of the jaw 12 is clamped inward, and the rock core is broken at the jaw 12, and the fractured core will continue to go up with the jaw 12 to remain in the inner core tube 2.

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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)

Abstract

公开了一种岩芯钻取工具，包括取芯钻具、捕芯器（1）和内芯管（2），取芯钻具包括外芯管（3）和空心的钻头（4），钻头包括二级刀片（411，421），二级刀片（411，421）处设有冷却液回路孔（5）；捕芯器（1）包括环形基体（11）和多个卡爪（12），环形基体（11）安装在内芯管（2）上，卡爪（12）均匀设置在环形基体（11）上，卡爪（12）上端向内收拢；内芯管（2）下端伸向外芯管（3）底部。通过设计朝上并向内收拢的卡爪（12），卡爪（12）下行时，卡爪（12）易被岩芯撑开，从而使岩芯进入内芯管（2）内；卡爪（12）上行时，卡爪（12）难以被岩芯撑开，由于岩芯不能抵抗较大的拉力以及卡爪（12）的夹紧作用，岩芯在卡爪（12）处被拉断，断裂的岩芯将随卡爪（12）继续上行从而保持在内芯管（2）中；在刀片部位设置冷却液回路孔（5），冷却液可以通过冷却液回路孔（5）喷出以冷却刀片，加快刀片的冷却速度，减少刀具的磨损，延长刀片的寿命。

Description

岩芯钻取工具 技术领域
本发明涉及岩芯钻取设备技术领域，尤其涉及岩芯钻取工具。
背景技术
在油田勘探过程中，岩芯是发现油气层和研究地层、生油层、储油层、盖层、构造等的重要资料，通过对岩芯的观察研究，可以直接地了解地下岩层的岩性、物性和含油、气、水产状特征。油田投入开发后，要通过岩芯进一步研究和认识油层沉积特征，储层的物性、孔隙结构、润湿性、相对渗透率、岩相特征，油层物理模拟和油层水淹规律；认识和掌握不同开发阶段、不同含水阶段油层水淹特征，搞清剩余油分布，为油田开发方案设计，层系、井网调整和加密井提供科学依据。
取岩芯是在钻井过程中使用特殊的取芯工具把地下岩石成块地取到地面上来，这种成块的岩石叫做岩芯，通过它可以测定岩石的各种性质，直观地研究地下构造和岩石沉积环境，了解其中的流体性质等。在矿产勘探和开发过程中，需要按地质设计的地层层位和深度，开展钻进工作，向井内下入取芯工具，钻取出的岩石样品。
取芯工具包括取芯钻具和捕芯器，取芯钻具切割进入地层后，用捕芯器将岩芯保持在内筒中，现有的捕芯器只能取软岩，难以取硬岩。此外，现有的取芯钻具的刀片冷却速度慢，刀具的磨损快，刀片的使用寿命短。
发明内容
本发明旨在提供岩芯钻取工具，捕芯器包括朝上向内收拢的卡爪，便于取硬岩。
为达到上述目的，本发明采用的技术方案如下：
岩芯钻取工具，包括取芯钻具、捕芯器和内芯管，所述取芯钻具包括外芯管和空心的钻头，钻头与外芯管的下端连接；
所述捕芯器包括环形基体和多个卡爪，环形基体同轴安装在内芯管下端的内壁上，卡爪均匀设置在环形基体上，卡爪下端与环形基体 连接，卡爪上端向内收拢；所述内芯管下端伸向外芯管底部，内芯管与外芯管间隙配合。
进一步的，所述钻头包括用于钻孔的第一级刀片和用于扩孔的第二级刀片。
进一步的，所述钻头包括内钻头和外钻头，所述内钻头安装在外钻头内，第一级刀片位于内钻头下端，第二级刀片位于外钻头外侧壁上。
优选地，所述第一级刀片在圆周方向等间隔设有三个，第二级刀片在圆周方向等间隔设有三个。
进一步的，钻头上第一级刀片和第二级刀片处均设有冷却液回路孔。
进一步的，所述外芯管和钻头外壁均设有螺旋槽，钻头上的螺旋槽与外芯管上的螺旋槽连续。
进一步的，卡爪包括一体制造的竖直臂和倾斜臂，所述竖直臂下端与环形基体连接，竖直臂上端与倾斜臂的下端连接，倾斜臂的上端为自由端，倾斜臂从下往上向内倾斜。
优选地，倾斜臂的倾斜角为60°。
其中，内芯管内壁有石墨烯涂层。内壁附加石墨烯涂层，可以减小岩芯在岩心筒内移动的摩擦系数，降低热量的传递散失，还可降低外部辐射对岩芯的影响，提高保真质量。
进一步的，钻头内壁设有密封圈，利用高弹性的环向密封圈，实现取芯过程中对岩芯的包裹，达到隔离保质效果，达到保湿、保质目标。
其中，卡爪与环形基体一体制造，环形基体外套装有环形套，环形基体与环形套固接；内芯管内壁有与环形套适配的环形槽，环形套装在环形槽中。
与现有技术相比，本发明具有以下有益效果：
1，本发明设计朝上并向内收拢的机械卡爪，当卡爪下行时，卡爪易被岩芯撑开，从而使岩芯进入内芯筒内；当卡爪上行时，卡爪难以被岩芯撑开，由于岩芯不能抵抗较大的拉力以及卡爪的夹紧作用，岩芯在卡爪处被拉断，断裂的岩芯将随卡爪继续上行从而保持在内筒中；
2，本发明中钻头分为二级刀片，由最下端的刀片首先钻小孔，再由上方的刀片扩孔，可以提高钻进速度，提高取芯效率；
3，本发明在刀片部位均设置通孔作为冷却液回路孔，冷却液可以通过该通孔喷出来冷却刀片，加快刀片的冷却速度，减少刀具的磨损，延长刀片的寿命；
4，在外芯管的外壁设置有与钻头连续的螺旋槽，随着外芯管旋入岩层，外芯管给取芯工具创造一个密闭空间，可防止保真舱被污染；
5，内芯管内壁有石墨烯涂层，可以减小岩芯在岩心筒内移动的摩擦系数，降低热量的传递散失，还可降低外部辐射对岩芯的影响，提高保真质量。
附图说明
图1是本发明的结构示意图；
图2是内芯管的结构示意图；
图3是图2中A处的放大图；
图4是捕芯器的三维立体图；
图5是捕芯器的截面图；
图6是取芯钻具的结构示意图；
图7是钻头的结构示意图；
图8是外钻刀体的结构示意图；
图9是内钻刀体的结构示意图；
图中：1-捕芯器、2-内芯管、3-外芯管、4-钻头、5-冷却液回路孔、6-螺旋槽、7-环形套、8-密封圈、11-环形基体、12-卡爪、21-岩芯筒、22-芯套管、23-环形槽、41-内钻头、42-外钻头、121-竖直臂、122-倾斜臂、411-第一级刀片、412-内钻刀体、413-第一级刀片安装槽、421-第二级刀片、422-外钻刀体、423-第二级刀片安装槽、424-第一级刀片避让缺口。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图，对本发明进行进一步详细说明。
如图1、6所示，本发明公开的岩芯钻取工具，包括取芯钻具、捕芯器1和内芯管2，取芯钻具包括外芯管3和空心的钻头4，钻头4与外芯管3的下端连接，捕芯器1设于内芯管2下端的内壁上，内芯管2下端伸向外芯管3底部并与外芯管3间隙配合。
如图4、5所示，捕芯器1包括环形基体11和多个卡爪12，卡爪12均匀设置在环形基体11上，卡爪12下端与环形基体11连接，卡爪12上端向内收拢。卡爪12有8-15个，优选地，卡爪12有12个。卡爪12的个数可根据需要设置，不限于上述个数。
卡爪12包括一体制造的竖直臂121和倾斜臂122，竖直臂121下端与环形基体11连接，竖直臂121上端与倾斜臂122的下端连接，倾斜臂122的上端为自由端，倾斜臂122从下往上向内倾斜，倾斜臂122的倾斜度可以根据需要调整。本实施方式中倾斜臂122的倾斜角为60°，卡爪12从下往上宽度逐渐变小。
其中，卡爪12的厚度与环形基体11的厚度相等，卡爪12与环形基体11一体制造。环形基体11外套装有环形套7，环形基体11与环形套7固接。内芯管2内壁有石墨烯涂层。如图2、3所示，内芯管2包括岩芯筒21和芯套管22，芯套管22上端套装固定在岩芯筒21的下端，芯套管22内壁有与环形套7适配的环形槽23，环形套7装在环形槽23中，卡爪12的自由端朝向上方。卡爪12自由端朝上并向内收拢，当岩芯从下往上穿过硬质的捕芯器1时卡爪12容易被撑开，反之则难。
钻头4为PCD刀具。如图6、7所示，钻头4包括内钻头41和外钻头42，内钻头41包括第一级刀片411和空心的内钻刀体412。如图9所示，内钻刀体412下端有用于安装第一级刀片411的第一级刀片安装槽413，第一级刀片安装槽413开口于内钻刀体412的下端面，内钻刀体412上第一级刀片安装槽413处有冷却液回路孔5，该冷却液回路孔5为弧形孔，弧形孔开口于钻头4的前端面并且与第一级刀片安装槽413连通。内钻刀体412上在圆周方向等间隔设有三个第一级刀片安装槽413，每个第一级刀片安装槽413处均设有冷却液回路孔5，每个第一级刀片安装槽413中均安装有第一级刀片411。
外钻头42包括第二级刀片421和空心的外钻刀体422。如图8所示，第二级刀片421外壁有用于安装第二级刀片421的第二级刀片安装槽423，外钻刀体422上第二级刀片安装槽423处有冷却液回路孔5，该冷却液回路孔5为条形孔，条形孔与第二级刀片安装槽423连通。外钻刀体422上在圆周方向等间隔设有三个第二级刀片安装槽423，每个第二级刀片安装槽423处均设有冷却液回路孔5，每个第二级刀片安装槽423中均安装有第二级刀片421。
内钻头41安装在外钻头42内，外钻刀体422上对应第一级刀片 411的位置有第一级刀片避让缺口424，第一级刀片避让缺口424开口于外钻头42的前端面，第一级刀片411的切削刃从第一级刀片避让缺口424处外露于外钻刀体422。
内钻刀体412内壁设有密封圈8，密封圈8位于第一级刀片411上方，利用高弹性的环向密封圈，实现取芯过程中对岩芯的包裹，达到隔离保质效果，达到保湿、保质目标。
本发明中钻头分为二级刀片，由最下端的第一级刀片411首先钻小孔，再由上方的第二级刀片421扩孔，可以提高钻进速度。在刀片部位均设置通孔作为冷却液回路孔5，冷却液可以通过该通孔喷出，来冷却刀片。本发明利用硬质合金锐口薄唇钻头切割岩层，减少取芯过程对地层的扰动，保证取芯完整度和质量。
如图1、6、8所示，外芯管3和外钻刀体422外壁均设有螺旋槽6，外钻刀体422上的螺旋槽6与外芯管3上的螺旋槽6连续。外壁设置螺旋槽6的外芯管3相当于螺旋外钻，随着外芯管3旋入岩层，外芯管3给取芯工具创造一个密闭空间，密封圈8在取芯过程中对岩芯的包裹，防止保真舱被污染。
工作时，随着钻头4的钻进，岩芯进入内芯管2中并从捕芯器1中间穿过，在岩心穿过硬质的卡爪12时会将卡爪12撑开；停钻后，向上提拉时，卡爪12随内芯管2向上移动，因为卡爪12自由端内收，此时卡爪12难以被岩芯撑开，由于岩芯不能抵抗较大的拉力以及卡爪12自由端的内收夹紧，岩芯在卡爪12处被拉断，断裂的岩芯将随卡爪12继续上行从而保持在内芯管2中。
当然，本发明还可有其它多种实施方式，在不背离本发明精神及其实质的情况下，熟悉本领域的技术人员可根据本发明作出各种相应的改变和变形，但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。

Claims (10)

  1. 岩芯钻取工具，其特征在于:包括取芯钻具、捕芯器(1)和内芯管(2)，所述取芯钻具包括外芯管(3)和空心的钻头(4)，钻头(4)与外芯管(3)的下端连接；
    所述捕芯器(1)包括环形基体(11)和多个卡爪(12)，环形基体(11)同轴安装在内芯管(2)下端的内壁上，卡爪(12)均匀设置在环形基体(11)上，卡爪(12)下端与环形基体(1)连接，卡爪(2)上端向内收拢；所述内芯管(2)下端伸向外芯管(3)底部，内芯管(2)与外芯管(3)间隙配合。
  2. 根据权利要求1所述的岩芯钻取工具，其特征在于：所述钻头(4)包括用于钻孔的第一级刀片(411)和用于扩孔的第二级刀片(421)。
  3. 根据权利要求2所述的岩芯钻取工具，其特征在于：所述钻头(4)包括内钻头(41)和外钻头(42)，所述内钻头(41)安装在外钻头(42)内，第一级刀片(411)位于内钻头(41)下端，第二级刀片(421)位于外钻头(42)外侧壁上。
  4. 根据权利要求2所述的岩芯钻取工具，其特征在于：所述第一级刀片(411)在圆周方向等间隔设有三个，第二级刀片(421)在圆周方向等间隔设有三个。
  5. 根据权利要求2、3或4所述的岩芯钻取工具，其特征在于：钻头(4)上第一级刀片(411)和第二级刀片(421)处均设有冷却液回路孔(5)。
  6. 根据权利要求1、2或3所述的岩芯钻取工具，其特征在于：所述外芯管(3)和钻头(4)外壁均设有螺旋槽(6)，钻头(4)上的螺旋槽(6)与外芯管(3)上的螺旋槽(6)连续。
  7. 根据权利要求1所述的岩芯钻取工具，其特征在于：卡爪(12)包括一体制造的竖直臂(121)和倾斜臂(122)，所述竖直臂(121)下端与环形基体(11)连接，竖直臂(121)上端与倾斜臂(122)的下端连接，倾斜臂(122)的上端为自由端，倾斜臂(122)从下往上向内倾斜。
  8. 根据权利要求7所述的岩芯钻取工具，其特征在于：倾斜臂(122)的倾斜角为60°。
  9. 根据权利要求1所述的岩芯钻取工具，其特征在于：内芯管(2)内壁有石墨烯涂层。
  10. 根据权利要求1或3所述的岩芯钻取工具，其特征在于：钻头(4)内壁设有密封圈(8)。
PCT/CN2018/108971 2018-08-13 2018-09-30 岩芯钻取工具 WO2020034350A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810918676.7A CN109138881B (zh) 2018-08-13 2018-08-13 岩芯钻取工具
CN201810918676.7 2018-08-13

Publications (1)

Publication Number Publication Date
WO2020034350A1 true WO2020034350A1 (zh) 2020-02-20

Family

ID=64792905

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/108971 WO2020034350A1 (zh) 2018-08-13 2018-09-30 岩芯钻取工具

Country Status (2)

Country Link
CN (1) CN109138881B (zh)
WO (1) WO2020034350A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112412374B (zh) * 2020-11-18 2022-06-10 重庆市二零五勘测设计有限公司 一种地质勘探系统及其施工方法
CN113482537B (zh) * 2021-07-14 2023-08-15 深圳大学 一种具有柔性钻头的钻探取芯装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101666217A (zh) * 2009-09-16 2010-03-10 刘宝林 绳索侧壁补心钻具
CN101761317A (zh) * 2010-01-19 2010-06-30 中国地质大学（武汉） 岩样取芯夹具
US20150233201A1 (en) * 2014-02-18 2015-08-20 Baker Hughes Incorporated Coring tools with improved reliability during core jams, and related methods
US9803441B2 (en) * 2012-11-08 2017-10-31 Flexidrill Limited Seated hammer apparatus for core sampling
CN206722783U (zh) * 2017-05-09 2017-12-08 刘黎旺 双壁钻杆用岩芯卡取机构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86200075U (zh) * 1986-01-06 1987-06-24 地质矿产部石油钻井研究所 液力送钻三筒式取心工具
FR2794842B1 (fr) * 1999-06-10 2001-09-28 Gaz De France Dispositif de securite universel et procede de protection d'une canalisation
CN102913162B (zh) * 2012-10-26 2015-06-24 宝鸡石油机械有限责任公司 深海沉积物连续保压取芯海底钻机及作业方法
DE202017105037U1 (de) * 2017-08-22 2017-08-28 SysBohr GmbH Bohrkrone

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101666217A (zh) * 2009-09-16 2010-03-10 刘宝林 绳索侧壁补心钻具
CN101761317A (zh) * 2010-01-19 2010-06-30 中国地质大学（武汉） 岩样取芯夹具
US9803441B2 (en) * 2012-11-08 2017-10-31 Flexidrill Limited Seated hammer apparatus for core sampling
US20150233201A1 (en) * 2014-02-18 2015-08-20 Baker Hughes Incorporated Coring tools with improved reliability during core jams, and related methods
CN206722783U (zh) * 2017-05-09 2017-12-08 刘黎旺 双壁钻杆用岩芯卡取机构

Also Published As

Publication number Publication date
CN109138881B (zh) 2019-11-05
CN109138881A (zh) 2019-01-04

Similar Documents

Publication Publication Date Title
US11788371B2 (en) Coring device
WO2020133724A1 (zh) 岩样保真取芯装置
WO2020133726A1 (zh) 岩样原位保真取芯系统
CN104196479B (zh) 一种用于绳索取心钻进的电磁随钻测量系统
US9822615B2 (en) Apparatus and method for jet perforating and cutting tool
CN109973035A (zh) 岩样保真取芯系统
WO2020034349A1 (zh) 硬岩取芯钻具
CN106088125B (zh) 沉井的刃脚正下方土体水下爆破取土装置及其方法
US3123157A (en) Recovery of drill cuttings from subsurface earth formations
WO2020034350A1 (zh) 岩芯钻取工具
US3814180A (en) Well fishing apparatus
CN203412537U (zh) 一种绳索取心钻具
AU2024200192A1 (en) Deployment of downhole sensing device(s)
WO2020034354A1 (zh) 割芯装置
CN209129536U (zh) 一种硬岩取芯钻具
CN208966232U (zh) 一种岩芯钻取工具
US10927640B2 (en) Single-trip wellbore liner drilling system
US11480048B2 (en) Seismic-while-drilling systems and methodology for collecting subsurface formation data
CN209228327U (zh) 取岩芯装置
CN209129565U (zh) 一种割芯装置
CN208967146U (zh) 取芯钻机液道启动机构
US2890861A (en) Underwater geophysical prospecting
US2540385A (en) Core drilling
US20120298355A1 (en) Logging While Pulling
CN215492535U (zh) 固定活塞回转取土器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18930369

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18930369

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 18930369

Country of ref document: EP

Kind code of ref document: A1