WO2020034363A1 - 一种取芯钻机与牙钻联锁机构 - Google Patents

一种取芯钻机与牙钻联锁机构 Download PDF

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Publication number
WO2020034363A1
WO2020034363A1 PCT/CN2018/109033 CN2018109033W WO2020034363A1 WO 2020034363 A1 WO2020034363 A1 WO 2020034363A1 CN 2018109033 W CN2018109033 W CN 2018109033W WO 2020034363 A1 WO2020034363 A1 WO 2020034363A1
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WIPO (PCT)
Prior art keywords
latch
drill
hole
drill pipe
spring
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PCT/CN2018/109033
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English (en)
French (fr)
Inventor
谢和平
高明忠
张茹
陈领
张志龙
张泽天
鲁义强
李聪
何志强
华夏
明传剑
陆彤
彭高友
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四川大学
深圳大学
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Application filed by 四川大学, 深圳大学 filed Critical 四川大学
Publication of WO2020034363A1 publication Critical patent/WO2020034363A1/zh

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    • 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 a drilling core system, in particular to an interlocking mechanism of a core drill and a dental drill.
  • 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 core drilling rig Before the coring begins, the core drilling rig needs to be inserted into the dental drill to reach the core position. The rig needs to be fixed to limit the forward and circumferential movement of the rig. After the core is completed, the core rig needs to be recovered. The movement is not restricted, and the interlocking structure between the existing core drilling rig and the dental drill is complicated, and disassembly is inconvenient.
  • the invention aims to provide an interlocking mechanism of a core drilling machine and a dental drill, which can restrict the forward and circumferential movement of the drilling machine, without restricting the backward movement, simple structure, and convenient disassembly and assembly.
  • the invention discloses an interlocking mechanism for a coring drill and a dental drill, which comprises a coring drill and a dental drill.
  • the dental drill is hollow.
  • the outer wall of the coring drill is in sliding cooperation with the inner wall of the dental drill.
  • the inner wall of the dental drill has a locking groove.
  • the outer wall of the core drilling rig is provided with a latch slot, and the locking slot and the latch slot are provided in the axial direction.
  • the latch slot has a latch, the latch slot is connected with a rotating shaft, and the rotating shaft is arranged in the radial direction of the core drilling machine. There is a through hole at one end, the rotating shaft passes through the through hole, and the latch cooperates with the rotating shaft.
  • the inner side of the other end of the latch is provided with a spring hole A.
  • the spring hole A is a blind hole.
  • the spring hole A has a compression spring. The spring is in contact with the coring rig. When the spring bounces, the latch part is embedded in the locking groove.
  • the outer side surface of the latch includes an axial plane, a first inclined surface, and a second inclined surface.
  • the rear end of the first inclined surface is connected to the rear end surface of the latch.
  • the front end of the first inclined surface is connected to the rear end of the second inclined surface.
  • the rear end of the axial plane is connected, and the front end of the axial plane is connected to the front end surface of the latch.
  • the angle between the first inclined plane and the radial section is smaller than the angle between the second inclined plane and the radial section.
  • the distance from the through hole to the rear end of the latch is greater than the distance from the through hole to the front end of the latch, and the distance from the spring hole A to the rear end of the latch is less than the distance from the spring hole A to the front end of the latch.
  • the end surface is flat, and the front end surface of the latch is curved.
  • the spring hole A is within a projection range of the second oblique surface facing the inner side of the latch, the distance from the center of the through hole to the inner and outer sides of the latch is equal, and the axial plane is connected to the second oblique surface The distance from the rear end face of the latch is smaller than the distance from the front end face of the latch.
  • the core drilling rig includes a lock body and a seal ring
  • the latch groove is outside the lock body
  • a portion of the lock body behind the lock groove is thinner than a portion of the lock body in front of the lock groove
  • the seal ring It is connected to the lock body.
  • the seal ring is connected behind the latch groove.
  • the outer diameter of the seal ring is the same as the outer diameter of the front part of the lock groove.
  • the inner diameter of the front section of the seal ring gradually increases from back to front.
  • the inner diameter of the seal ring at the rear end face of the latch groove is greater than the outer diameter of the lock body, and the outer side of the latch is in contact with the inner wall of the seal ring.
  • the spring hole A is a round hole
  • the bottom of the latch groove is provided with a spring hole B
  • the spring hole B corresponds to the spring hole A
  • the hole diameters of the spring hole A and the spring hole B are the same.
  • the included angle between the first inclined surface and the radial section is 40 °
  • the included angle between the second inclined surface and the radial section is 85 °
  • the included angle between the inner wall of the front section of the seal ring and the radial section is 45 °.
  • the rotating shaft is a positioning pin
  • the core drilling rig is provided with a positioning hole radially, the positioning hole passes through the inside of the latch slot and penetrates the core drilling rig, and the length of the positioning pin is greater than the width of the latch slot. End in the positioning hole.
  • the two locking grooves face each other, the two locking grooves have two, and the two locking grooves face each other.
  • the dental drill includes a first drill pipe, a second drill pipe, and a third drill pipe from back to front.
  • the first drill pipe is detachably connected to the second drill pipe, and the second drill pipe and the third drill pipe may be detachably connected.
  • the front end of the first drill pipe is a male head
  • the rear end of the second drill pipe is a female head
  • the front end is a male head
  • the rear end of the third drill pipe is a female head
  • the inner diameter of the first drill pipe and the inner diameter of the third drill pipe Equally, the inner diameter of the second drill pipe is larger than the inner diameter of the third drill pipe, and the locking groove is surrounded by the inner wall of the second drill pipe, the front end face of the first drill pipe head, and the front end face of the third drill pipe female head.
  • the rear section of the latch is ejected by the spring and extends into the locking groove.
  • the core drill is locked in the dental drill and reaches the landing position.
  • the core drill cannot move in the forward and circumferential directions.
  • the outer side of the latch includes a first inclined surface and a second inclined surface.
  • the inner diameter of the contact point between the seal ring and the latch gradually increases from back to front. When the drill moves backward, it is more convenient to squeeze the latch and compress the spring;
  • the rotating shaft is a positioning pin.
  • the positioning pin passes through the positioning hole, the latch slot and the through hole on the latch, and the latch is fixed in the latch slot, which is convenient for disassembly;
  • the dental drill includes a first drill pipe, a second drill pipe and a third drill pipe.
  • the locking groove is surrounded by the inner wall of the second drill pipe, the front end face of the first drill pipe and the front end face of the third drill pipe female. , Easy to disassemble and repair.
  • FIG. 1 is a schematic diagram of the present invention
  • Figure 2 is a sectional view of A-B plane
  • Figure 3 is a schematic diagram of the latch
  • the interlocking mechanism of a coring drill and a dental drill disclosed in the present invention includes a coring drill and a dental drill.
  • the dental drill is hollow.
  • the outer wall of the coring drill is in sliding cooperation with the inner wall of the dental drill.
  • the locking groove 9 has two locking grooves 9 and the two locking grooves 9 are opposite to each other.
  • the dental drill includes a first drill pipe 1, a second drill pipe 7 and a third drill pipe 8 from the back to the front. Pipe 1 is detachably connected to the second drill pipe 7 and the second and third drill pipes 7 and 8 are detachably connected.
  • the front end of the first drill pipe 1 is a male head
  • the rear end of the second drill pipe 7 is a female head
  • the front end is Male head
  • the rear end of the third drill pipe 8 is the female head
  • the inner diameter of the first drill pipe 1 and the inner diameter of the third drill pipe 8 are equal
  • the inner diameter of the second drill pipe 7 is larger than the inner diameter of the third drill pipe 8
  • the locking groove 9 is provided by the second
  • the inner wall of the drill pipe 7 is surrounded by the front end face of the first drill pipe 1 and the front end face of the third drill pipe 8 female.
  • the locking groove 9 is provided along the axial direction.
  • the latch slots 10 There are two latch slots 10 on the outer wall of the core drilling rig.
  • the two latch slots 10 are opposite to each other.
  • the latch slots 10 are arranged in the axial direction.
  • the latch slots 10 have the latches 2 and the latch slots 10.
  • the rotating shaft is set along the radial direction of the core drilling rig.
  • the rotating shaft is a positioning pin.
  • the positioning pin passes through the through hole 3.
  • the latch 2 and the positioning pin rotate to cooperate.
  • the through hole 3 reaches the latch.
  • the distance from the back end of the 2 is greater than the distance from the through hole 3 to the front end of the latch 2.
  • the core drilling rig has radial positioning holes that pass through the inside of the latch slot 10 and the core drilling rig.
  • the length of the positioning pin is greater than the width of the latch slot 10.
  • the two ends of the positioning pin are in the positioning hole.
  • the spring hole A25 is a round hole.
  • the spring hole A25 is a blind hole.
  • the distance from the spring hole A25 to the rear end of the latch 2 is less than the spring hole A25 to the lock.
  • the distance between the front end of the latch 2 and the bottom of the latch groove 10 has a spring hole B.
  • the spring hole B corresponds to the spring hole A25.
  • the spring hole A25 and the spring hole B have the same diameter.
  • the compression spring 4 is installed in the spring hole A25 and the spring hole B. In the middle, the spring 4 is in contact with the core drilling rig and the latch 2. When the spring 4 is popped up, the latch 2 is partially embedded in the locking groove 9.
  • the core drilling rig includes a lock body 5 and a seal ring 6, the latch groove 10 is on the outer wall of the lock body 5, the part of the lock body 5 behind the latch groove 10 is thinner than the lock body 5 in front of the latch groove 10, and the seal ring 6 and the lock
  • the body 5 is connected, the seal ring 6 is connected behind the latch groove 10, the outer diameter of the seal ring 6 is the same as the outer diameter of the lock body 5 in front of the latch groove 10, the inner wall of the rear section of the seal ring 6 is in contact with the outer wall of the lock body 5, and the seal ring
  • the inner diameter of the front section 6 gradually increases from back to front.
  • the angle between the inner wall of the front section of the sealing ring 6 and the radial section is 45 °.
  • the front end surface of the sealing ring 6 is in front of the rear end surface of the latch groove 10 and behind the second inclined surface 23.
  • the inner diameter of the sealing ring 6 at the rear end face is larger than the outer diameter of the lock body 5 here.
  • the outer side of the latch 2 is in contact with the inner wall of the sealing ring 6.
  • the outer diameter of the sealing ring 6 is 99.6mm, the inner diameter is 82mm, and the length of the sealing ring 6 is 23mm.
  • the outer wall of the rear end of the sealing ring 6 has a chamfer of 3 mm ⁇ 45 °, and the outer diameter of the lock body 5 behind the latch groove 10 is 82 mm.
  • the outer side surface of the latch 2 includes an axial plane 24, a first inclined surface 22, and a second inclined surface 23.
  • the rear end of the first inclined surface 22 is connected to the rear end surface 21 of the latch, and the front end of the first inclined surface 22 is connected to the second inclined surface.
  • 23 rear end, the front end of the second inclined surface 23 is connected to the rear end of the axial plane 24, the front end of the axial plane 24 is connected to the front end surface of the latch, the rear end surface of the latch 21 is flat, the front end surface of the latch is curved, spring hole A25 and spring
  • the hole B is within the projection range of the second inclined surface 22 to the inner side of the latch 2. The distance from the center of the through hole 3 to the inner and outer sides of the latch 2 is equal.
  • the total length of the latch 2 is 131 mm.
  • the distance between the connection of the two inclined surfaces 23 to the rear end surface 21 of the latch is 42mm, the included angle between the first inclined surface 22 and the radial section is 40 °, the included angle between the second inclined surface 23 and the radial section is 85 °, and the curved surface of the front end of the latch
  • the radius is 11mm
  • the diameter of the through hole 3 is 10mm
  • the center of the arc of the front surface of the latch coincides with the center of the through hole 3
  • the diameter of the spring hole A25 is 13mm
  • the depth is 12mm
  • the distance from the center of the spring hole A25 to the rear end surface 21 of the latch is 20mm
  • latch 2 is 20mm wide and thick.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Drilling Tools (AREA)

Abstract

一种取芯钻机与牙钻联锁机构被公开。该牙钻中空，取芯钻机外壁与牙钻内壁滑动配合，牙钻内壁有锁紧槽（9），取芯钻机外壁有锁闩槽（10），锁紧槽（9）和锁闩槽（10）均沿轴向，锁闩槽（10）内有锁闩（2），锁闩槽（10）内连有转轴，转轴沿取芯钻机径向设置，锁闩（2）上有通孔（3），转轴穿过通孔（3），锁闩（2）与转轴转动配合，通孔（3）到锁闩（2）后端的距离大于通孔（3）到锁闩（2）前端的距离，锁闩（2）内侧面有弹簧孔A（25），弹簧孔A（25）为盲孔，弹簧孔A（25）内有压紧弹簧（4），弹簧（4）与取芯钻机接触，弹簧孔A（25）到锁闩（2）后端的距离小于弹簧孔A（25）到锁闩（2）前端的距离，弹簧（4）弹起时，锁闩（2）部分嵌入锁紧槽（9）。该取芯钻机与牙钻联锁机构可限制钻机向前和周向运动，而向后运动不受约束，结构简单，拆装方便。

Description

一种取芯钻机与牙钻联锁机构 技术领域
本发明涉及钻井取芯系统，尤其涉及一种取芯钻机与牙钻联锁机构。
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。
取芯开始前，需将取芯钻机伸入牙钻，到达取芯位置，钻机需要固定，限制钻机向前和周向运动，而取芯结束后，需回收取芯钻机，要使钻机向后运动不受限制，现有的取芯钻机与牙钻的联锁结构复杂，拆装不便。
发明内容
本发明旨在提供一种取芯钻机与牙钻联锁机构，可限制钻机向前和周向运动，而向后运动不受约束，结构简单，拆装方便。
为达到上述目的，本发明采用的技术方案如下：
本发明公开的取芯钻机与牙钻联锁机构，包括取芯钻机和牙钻，所述牙钻中空，取芯钻机外壁与牙钻内壁滑动配合，所述牙钻内壁有锁紧槽，所述取芯钻机外壁有锁闩槽，锁紧槽和锁闩槽均沿轴向设置，锁闩槽内有锁闩，锁闩槽内连有转轴，转轴沿取芯钻机径向设置，锁闩一端有通孔，转轴穿过通孔，锁闩与转轴转动配合，所述锁闩另一端的内侧面有弹簧孔A，所述弹簧孔A为盲孔，弹簧孔A内有压紧弹簧，弹簧与取芯钻机接触，弹簧弹起时，锁闩部分嵌入锁紧槽。
进一步的，所述锁闩外侧面包括轴向平面、第一斜面和第二斜面，第一斜面后端与锁闩后端面连接，第一斜面前端连接第二斜面后端，第二斜面前端与轴向平面后端连接，轴向平面前端连接锁闩前端面，所述第一斜面与径向截面的夹角小于第二斜面与径向截面的夹角。
进一步的，所述通孔到锁闩后端的距离大于通孔到锁闩前端的距离，所述弹簧孔A到锁闩后端的距离小于弹簧孔A到锁闩前端的距离，所述锁闩后端面为平面，锁闩前端面为弧面。
进一步的，所述弹簧孔A在第二斜面向锁闩内侧面的投影范围内，所述通孔孔心到锁闩内侧面和外侧面的距离相等，所述轴向平面与第二斜面连接处到锁闩后端面的距离小于到锁闩前端面的距离。
进一步的，所述取芯钻机包括锁体和密封圈，所述锁闩槽在锁体外壁，所述锁体在锁闩槽后方部分比锁体在锁闩槽前方部分细，所述密封圈与锁体连接，密封圈连接在锁闩槽后方，密封圈外径与锁体锁闩槽前方部分外径相同，所述密封圈前段内径从后到前逐渐增大，密封圈前端面在锁闩槽后端面前方且在第二斜面后方，锁闩槽后端面处密封圈的内径大于此处锁体外径， 锁闩外侧面与密封圈内壁接触。
进一步的，所述弹簧孔A为圆孔，所述锁闩槽槽底有弹簧孔B，所述弹簧孔B与弹簧孔A相对应，弹簧孔A和弹簧孔B孔径相同。
进一步的，所述第一斜面与径向截面夹角为40°，所述第二斜面与径向截面夹角为85°，所述密封圈前段内壁与径向截面夹角为45°。
进一步的，所述转轴为定位销钉，所述取芯钻机径向开有定位孔，所述定位孔穿过锁闩槽内部且贯穿取芯钻机，定位销钉长度大于锁闩槽宽度，定位销钉两端在定位孔内。
进一步的，所述锁紧槽有两个，两个锁紧槽正对，所述锁闩槽有两个，两个锁闩槽正对。
进一步的，所述牙钻从后到前包括第一钻管、第二钻管和第三钻管，第一钻管与第二钻管可拆卸连接，第二钻管和第三钻管可拆卸连接，第一钻管前端为公头，第二钻管后端为母头、前端为公头，第三钻管后端为母头，所述第一钻管内径和第三钻管内径相等，所述第二钻管内径大于第三钻管内径，所述锁紧槽由第二钻管内壁、第一钻管公头前端面和第三钻管母头前端面围绕而成。
本发明具有以下有益效果：
1、锁闩后段被弹簧弹出，伸入锁紧槽，将取芯钻机卡接在牙钻内，到达登陆位置，取芯钻机不能在向前和周向运动；
2、锁闩外侧面包括第一斜面和第二斜面，钻机向后运动时，锁闩压紧弹簧，使锁闩回到锁闩槽内，取芯钻机向后运动时不受约束；
3、密封圈与锁闩接触处内径从后到前逐渐增大，在钻机向后运动时，更方便挤压锁闩，压紧弹簧；
4、弹簧孔A和弹簧孔B固定弹簧位置，且安装方便；
5、转轴为定位销钉，定位销钉穿过定位孔、锁闩槽和锁闩上的通孔，将锁闩固定在锁闩槽内，拆装方便；
6、牙钻包括第一钻管、第二钻管和第三钻管，锁紧槽由第二钻管内壁、第一钻管公头前端面和第三钻管母头前端面围绕而成，拆装、检修方便。
附图说明
图1为本发明示意图；
图2为A-B面剖视图；
图3为锁闩示意图；
图中：1-第一钻管、2-锁闩、3-通孔、4-弹簧、5-锁体、6-密封圈、7-第二钻管、8-第三钻管、9-锁紧槽、10-锁闩槽、21-锁闩后端面、22-第一斜面、23-第二斜面、24-轴向平面、25-弹簧孔A。
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-图2所示，本发明公开的取芯钻机与牙钻联锁机构，包括取芯钻机和牙钻，牙钻中空，取芯钻机外壁与牙钻内壁滑动配合，牙钻内壁有锁紧槽9，锁紧槽9有两个，两个锁紧槽9正对，牙钻从后到前包括第一钻管1、第二钻管7和第三钻管8，第一钻管1与第二钻管7可拆卸连接，第二钻管7和第三钻管8可拆卸连接，第一钻管1前端为公头，第二钻管7后端为母头、前端为公头，第三钻管8后端为母头，第一钻管1内径和第三钻管8内径相等，第二钻管7内径大于第三钻管8内径，锁紧槽9由第二钻管7内壁、第一钻管1公头前端面和第三钻管8母头前端面围绕而成，锁紧槽9沿轴向设置。
取芯钻机外壁有锁闩槽10，锁闩槽10有两个，两个锁闩槽10正对，锁 闩槽10沿轴向设置，锁闩槽10内有锁闩2，锁闩槽10内有转轴，转轴沿取芯钻机径向设置，转轴为定位销钉，锁闩2上有通孔3，定位销钉穿过通孔3，锁闩2与定位销钉转动配合，通孔3到锁闩2后端的距离大于通孔3到锁闩2前端的距离，取芯钻机径向开有定位孔，定位孔穿过锁闩槽10内部且贯穿取芯钻机，定位销钉长度大于锁闩槽10宽度，定位销钉两端在定位孔内，锁闩2内侧面有弹簧孔A25，弹簧孔A25为圆孔，弹簧孔A25为盲孔，弹簧孔A25到锁闩2后端的距离小于弹簧孔A25到锁闩2前端的距离，锁闩槽10槽底有弹簧孔B，弹簧孔B与弹簧孔A25相对应，弹簧孔A25和弹簧孔B孔径相同，压紧弹簧4安装在弹簧孔A25和弹簧孔B中，弹簧4与取芯钻机和锁闩2接触，弹簧4弹起时，锁闩2部分嵌入锁紧槽9。
取芯钻机包括锁体5和密封圈6，锁闩槽10在锁体5外壁，锁体5在锁闩槽10后方部分比锁体5在锁闩槽10前方部分细，密封圈6与锁体5连接，密封圈6连接在锁闩槽10后方，密封圈6外径与锁体5在锁闩槽10前方部分外径相同，密封圈6后段内壁与锁体5外壁接触，密封圈6前段内径从后到前逐渐增大，密封圈6前段内壁与径向截面夹角为45°，密封圈6前端面在锁闩槽10后端面前方且在第二斜面23后方，锁闩槽10后端面处密封圈6的内径大于此处锁体5外径，锁闩2外侧面与密封圈6内壁接触，密封圈6外径为99.6mm，内径为82mm，密封圈6长度为23mm，密封圈6后端外壁有3mm×45°的倒角，锁体5在锁闩槽10后方部分外径为82mm。
如图3所示，锁闩2外侧面包括轴向平面24、第一斜面22和第二斜面23，第一斜面22后端与锁闩后端面21连接，第一斜面22前端连接第二斜面23后端，第二斜面23前端与轴向平面24后端连接，轴向平面24前端连接锁闩前端面，锁闩后端面21为平面，锁闩前端面为弧面，弹簧孔A25和弹 簧孔B在第二斜面22向锁闩2内侧面的投影范围内，通孔3孔心到锁闩2内侧面和外侧面的距离相等，锁闩2总长度为131mm，轴向平面24与第二斜面23连接处到锁闩后端面21的距离为42mm，第一斜面22与径向截面夹角为40°，第二斜面23与径向截面夹角为85°，锁闩前端面弧面半径为11mm，通孔3直径为10mm，锁闩前端面弧面的圆心与通孔3中心重合，弹簧孔A25直径为13mm，深12mm，弹簧孔A25孔心到锁闩后端面21的距离为20mm，锁闩2宽和厚均为20mm。
操作时，将两侧锁闩2压入锁闩槽10，使取芯钻机沿牙钻内壁向前滑，当锁闩2到达锁紧槽9位置时，压紧弹簧4将锁闩2弹起，两侧的锁闩2部分嵌入锁紧槽9内，锁闩2外侧面与锁紧槽9配合限制取芯钻机向前滑，锁闩2前、后侧面与锁紧槽9配合限制取芯钻机周向运动，锁闩2弹起后，锁闩2外侧面与密封圈6内壁斜面接触，限制锁闩2向外开启的位置，回收取芯钻机时，密封圈6内壁挤压第一斜面22和第二斜面23，压紧弹簧4，使锁闩2回到锁闩槽10内，取芯钻机向后运动。
当然，本发明还可有其它多种实施例，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. 一种取芯钻机与牙钻联锁机构，包括取芯钻机和牙钻，所述牙钻中空，取芯钻机外壁与牙钻内壁滑动配合，其特征在于：所述牙钻内壁有锁紧槽(9)，所述取芯钻机外壁有锁闩槽(10)，锁紧槽(9)和锁闩槽(10)均沿轴向设置，锁闩槽(10)内有锁闩(2)，锁闩槽(10)内连有转轴，转轴沿取芯钻机径向设置，锁闩(2)一端有通孔(3)，转轴穿过通孔(3)，锁闩(2)与转轴转动配合，所述锁闩(2)另一端的内侧面有弹簧孔A(25)，所述弹簧孔A(25)为盲孔，弹簧孔A(25)内有压紧弹簧(4)，弹簧(4)与取芯钻机接触，弹簧(4)弹起时，锁闩(2)部分嵌入锁紧槽(9)。
  2. 根据权利要求1所述的取芯钻机与牙钻联锁机构，其特征在于：所述锁闩(2)外侧面包括轴向平面(24)、第一斜面(22)和第二斜面(23)，第一斜面(22)后端与锁闩后端面(21)连接，第一斜面(22)前端连接第二斜面(23)后端，第二斜面(23)前端与轴向平面(24)后端连接，轴向平面(24)前端连接锁闩(2)前端面，所述第一斜面(22)与径向截面的夹角小于第二斜面(23)与径向截面的夹角。
  3. 根据权利要求1所述的取芯钻机与牙钻联锁机构，其特征在于：所述通孔(3)到锁闩(2)后端的距离大于通孔(3)到锁闩(2)前端的距离，所述弹簧孔A(25)到锁闩(2)后端的距离小于弹簧孔A(25)到锁闩(2)前端的距离，所述锁闩后端面(21)为平面，锁闩(2)前端面为弧面。
  4. 根据权利要求2所述的取芯钻机与牙钻联锁机构，其特征在于：所述弹簧孔A(25)在第二斜面(23)向锁闩(2)内侧面的投影范围内，所述通孔(3)孔心到锁闩(2)内侧面和外侧面的距离相等，所述轴向平面(24)与第二斜面(23)连接处到锁闩后端面(21)的距离小于到锁闩(2)前端面 的距离。
  5. 根据权利要求2所述的取芯钻机与牙钻联锁机构，其特征在于：所述取芯钻机包括锁体(5)和密封圈(6)，所述锁闩槽(10)在锁体(5)外壁，所述锁体(5)在锁闩槽(10)后方部分比锁体(5)在锁闩槽(10)前方部分细，所述密封圈(6)与锁体(5)连接，密封圈(6)连接在锁闩槽(10)后方，密封圈(6)外径与锁体(5)在锁闩槽(10)前方部分外径相同，所述密封圈(6)前段内径从后到前逐渐增大，密封圈(6)前端面在锁闩槽(10)后端面前方且在第二斜面(23)后方，锁闩槽(10)后端面处密封圈(6)的内径大于此处锁体(5)外径，锁闩(2)外侧面与密封圈(6)内壁接触。
  6. 根据权利要求1所述的取芯钻机与牙钻联锁机构，其特征在于：所述弹簧孔A(25)为圆孔，所述锁闩槽(10)槽底有弹簧孔B，所述弹簧孔B与弹簧孔A(25)相对应，弹簧孔A(25)和弹簧孔B孔径相同。
  7. 根据权利要求6所述的取芯钻机与牙钻联锁机构，其特征在于：所述第一斜面(22)与径向截面夹角为40°，所述第二斜面(23)与径向截面夹角为85°，所述密封圈(6)前段内壁与径向截面夹角为45°。
  8. 根据权利要求1所述的取芯钻机与牙钻联锁机构，其特征在于：所述转轴为定位销钉，所述取芯钻机径向开有定位孔，所述定位孔穿过锁闩槽(10)内部且贯穿取芯钻机，定位销钉长度大于锁闩槽(10)宽度，定位销钉两端在定位孔内。
  9. 根据权利要求1-9所述任一项的取芯钻机与牙钻联锁机构，其特征在于：所述锁紧槽(9)有两个，两个锁紧槽(9)正对，所述锁闩槽(10)有两个，两个锁闩(2)槽正对。
  10. 根据权利要求1所述的取芯钻机与牙钻联锁机构，其特征在于：所 述牙钻从后到前包括第一钻管(1)、第二钻管(7)和第三钻管(8)，第一钻管(1)与第二钻管(7)可拆卸连接，第二钻管(7)和第三钻管(8)可拆卸连接，第一钻管(1)前端为公头，第二钻管(7)后端为母头、前端为公头，第三钻管(8)后端为母头，所述第一钻管(1)内径和第三钻管(8)内径相等，所述第二钻管(7)内径大于第三钻管(8)内径，所述锁紧槽(9)由第二钻管(7)内壁、第一钻管(1)公头前端面和第三钻管(8)母头前端面围绕而成。
PCT/CN2018/109033 2018-08-13 2018-09-30 一种取芯钻机与牙钻联锁机构 WO2020034363A1 (zh)

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