WO2021218253A1 - 一种矿山用内防喷保瓦斯接头 - Google Patents

一种矿山用内防喷保瓦斯接头 Download PDF

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Publication number
WO2021218253A1
WO2021218253A1 PCT/CN2021/073845 CN2021073845W WO2021218253A1 WO 2021218253 A1 WO2021218253 A1 WO 2021218253A1 CN 2021073845 W CN2021073845 W CN 2021073845W WO 2021218253 A1 WO2021218253 A1 WO 2021218253A1
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Prior art keywords
blowout prevention
pipe section
section
prevention valve
valve cover
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PCT/CN2021/073845
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English (en)
French (fr)
Inventor
高明忠
陈领
李佳南
李聪
何志强
赵乐
杨明庆
吴年汉
余波
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四川大学
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Priority to US17/997,275 priority Critical patent/US20230175339A1/en
Publication of WO2021218253A1 publication Critical patent/WO2021218253A1/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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/12—Valve arrangements for boreholes or wells in wells operated by movement of casings or tubings
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
    • 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
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/05—Flapper valves

Definitions

  • the invention relates to the field of coal mine tunnel core equipment, in particular to an internal blowout-proof and gas-preserving joint for mines.
  • Coal seam gas content and coal seam gas pressure are the main indicators for predicting the outburst risk area of outburst coal seams and verifying regional effects.
  • Coal seam gas content is usually measured by surface coalbed methane content measurement, geological survey gas content measurement, underground coal seam drilling and core drilling and other methods. Determination.
  • the core remover is usually composed of an inner tube assembly and an outer tube assembly. There is a gap between the inner tube assembly and the outer tube assembly, which leads to a higher risk of gas leakage.
  • a blowout prevention box at the top of the drill pipe is often used to prevent it. Gas leaks, but gas still exists in the drill pipe, causing safety hazards in the coring operation.
  • the invention aims to provide an internal blowout-proof and gas-preserving joint for mines, which has the function of automatically closing when coring the coal seam of the mine, reduces gas leakage, and allows large-diameter tools to pass through.
  • the invention discloses an internal blowout prevention and gas-preserving joint for mines, which comprises a body, which is installed at the bottom of a drill rod, and the body includes a valve pipe section and a connecting pipe section arranged from top to bottom.
  • the bottom of the valve pipe section is inserted into the top of the connecting pipe section, and the bottom end of the valve pipe section
  • the bottom surface of the valve pipe section is provided with a blowout prevention valve cover.
  • the edge of the blowout prevention valve cover rotates to connect to the bottom edge of the valve pipe section.
  • the bottom surface of the blowout prevention valve cover is provided with a torsion spring. The other end is connected to the inner wall of the connecting pipe section.
  • the bottom of the valve pipe section is a male section
  • the top of the connecting pipe section is a female section
  • the bottom of the connecting pipe is an outlet section
  • the inner diameter of the female section is larger than the outlet section
  • the blowout prevention valve cover can be an elastically deformable structure
  • blowout prevention valve cover When the blowout prevention valve cover is in the open state, the blowout prevention valve cover is curved, and the blowout prevention valve cover is close to the inner wall of the female head section.
  • the blowout prevention valve cover When the blowout prevention valve cover is closed, the blowout prevention valve cover is plate-shaped.
  • it further comprises a cylindrical pin, which is arranged on the bottom surface of the blowout prevention valve cover, and the cylindrical pin penetrates the blowout prevention valve cover and the torsion spring.
  • valve pipe section and the connecting pipe section are threadedly connected, and the top of the outer wall of the male section and the top of the inner wall of the female section are provided with mutually adapted threads.
  • the sealing surface of the blowout preventer valve seat is a first inclined surface whose diameter gradually increases from top to bottom
  • the sealing surface of the blowout preventer valve cover is a second inclined surface
  • the first inclined surface is adapted to the second inclined surface
  • the invention can reduce gas leakage.
  • the invention has a simple structure and good reliability.
  • the present invention can allow large diameter tools to pass through.
  • Figure 1 is a cross-sectional view of the internal blowout prevention and gas protection joint when it is opened;
  • Figure 2 is a cross-sectional view of the internal blowout prevention and gas protection joint when it is closed;
  • Figure 3 is a schematic diagram of coring work.
  • the present invention discloses an internal blowout prevention gas joint suitable for core removers.
  • the internal blowout prevention and gas-preserving joint includes a valve pipe section 701 and a connecting pipe section 702.
  • the valve pipe section 701 and the connecting pipe section 702 are detachably connected.
  • the top of the connecting pipe section 702 is a female section 703, and the bottom of the connecting pipe section 702 is an outlet section 704.
  • the inner diameter of the female section 703 is larger than the outlet section 704, and the inner diameter of the outlet section 704 is larger than the outer diameter of the inner pipe assembly.
  • the bottom of the valve pipe section 701 is a male header section 705, and the bottom end of the valve pipe section 701 is a blowout prevention valve seat 706.
  • the bottom surface of the valve pipe section 701 is provided with a blowout prevention valve cover 707.
  • the bottom surface of the valve cover 707 is provided with a torsion spring 708.
  • One end of the torsion spring 708 is connected to the blowout prevention valve cover 707, and the other end of the torsion spring 708 is connected to the inner wall of the female header section 703.
  • the sealing surface of the blowout prevention valve seat 706 gradually increases in diameter from top to bottom.
  • the first inclined surface 710, the sealing surface of the blowout prevention valve cover 707 is a second inclined surface 711, and the first inclined surface 710 is adapted to the second inclined surface 711,
  • a cylindrical pin 709 is provided.
  • the cylindrical pin 709 is provided on the bottom surface of the blowout preventer valve cover 707.
  • the cylindrical pin 709 penetrates between the blowout preventer valve cover 707 and the torsion spring 708.
  • the blowout prevention valve cover 707 can be a deformable structure. When the blowout prevention valve cover 707 is pushed open by the inner pipe assembly, the blowout prevention valve cover 707 can become an arc shape, and then close to the inner wall of the female header section 703, so that the device structure More compact.
  • Continuous catheter operation equipment includes reel device 1, transfer device 2,
  • the reel device 1 is used to transfer pulling components 8 such as ropes and continuous pipes,
  • the transfer device 2 includes an injection head 9, a blowout prevention box 5, and a drill rod driving device 6.
  • the drill rod driving device 6 drives the outer tube assembly of the core remover to rotate and press down through the drill rod 4, and the blowout prevention box 5 is installed on the drill rod. 4, to prevent gas eruption, the injection head 9 drives the pulling assembly 8 to complete the lifting movement of the inner tube assembly 10 of the core remover 3.
  • the pulling assembly 8 passes through the blowout prevention box 5 and enters the drill rod 4.
  • the drill rod driving device 6 is used to clamp the outer periphery of the top of the drill rod 4, and after the pulling assembly 8 is connected to the inner tube assembly 10, the inner tube assembly 10 is inserted and lowered from the drill rod 4 to make the inner tube assembly 10 into the outer tube assembly,
  • blowout prevention valve cover 707 When the inner pipe assembly 10 enters the inner blowout prevention and gas protection joint, the blowout prevention valve cover 707 is in a horizontal state under the action of the torsion spring 708, and the inner blowout prevention and gas protection joint is in a closed state.
  • the inner pipe assembly 10 When the inner pipe assembly 10 enters the inner blowout prevent gas joint, the inner pipe assembly 10 opens the blowout preventer valve cover 707. Because the blowout preventer valve cover 707 is a structure that is easy to deform, the blowout preventer valve cover 707 is tightly attached to the inner blowout preventer.
  • blowout prevention valve cover 707 When the inner pipe assembly 10 exits the inner blowout prevent and gas protection joint, the blowout prevention valve cover 707 is restored to a horizontal state under the action of the torsion spring 708, the blowout prevention valve cover 707 is restored to a flat state, and the inner blowout prevention and gas protection joint is closed.

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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)
  • Pipe Accessories (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

一种矿山用内防喷保瓦斯接头被公开。该接头包括本体，本体安装在钻杆（4）底部，本体包括自顶至底设置的阀门管段（701）、连接管段（702），阀门管段（701）底部插入连接管段（702）顶部；阀门管段（701）底端为防喷阀座（706），阀门管段（701）底面设有防喷阀盖（707），防喷阀盖（707）边沿转动连接阀门管段（701）底面边沿，防喷阀盖（707）底面设有扭簧（708），扭簧（708）一端连接防喷阀盖（707）底面，扭簧（708）另一端连接连接管段（702）内壁。该接头在对矿山煤层取芯作业时，具有自动关闭的功能，减少瓦斯的泄漏，允许大口径工具通过。

Description

一种矿山用内防喷保瓦斯接头 技术领域
本发明涉及煤矿坑道取芯装备领域，尤其涉及一种矿山用内防喷保瓦斯接头。
背景技术
我国既是煤炭生产大国，也是煤炭消费大国，煤炭是我国重要的基础能源和原料。煤层瓦斯含量和煤层瓦斯压力是突出煤层突出危险性区域预测和区域效果检验的主要指标，煤层瓦斯含量通常采用地面煤层气含量测定、地勘瓦斯含量测定、矿井井下煤层钻孔取芯等方法进行测定。
取芯器通常由内管总成和外管总成组成，内管总成和外管总成之间存在间隙，导致瓦斯泄漏风险较高，目前常常使用设于钻杆顶端的防喷盒阻止瓦斯泄漏，但钻杆内依旧存在瓦斯，导致取芯操作存在安全隐患。
在矿山煤层进行取芯作业时，通常需要多次经过钻杆内部上提、下放取芯器，在上提、下放取芯器过程中，钻杆内孔连通孔底和外部环境，经常会造成瓦斯泄漏，现有技术中防泄漏主要采用球阀、锥阀等形式，上述阀门的内孔不允许大直径工具通过，只允许气体等流体介质通过。
发明内容
本发明旨在提供一种矿山用内防喷保瓦斯接头，在对矿山煤层取芯作业时，具有自动关闭的功能，减少瓦斯的泄漏，允许大口径工具通过。
为达到上述目的，本发明是采用以下技术方案实现的：
本发明公开一种矿山用内防喷保瓦斯接头，包括本体，本体安装在钻杆底部，本体包括自顶至底设置的阀门管段、连接管段，阀门管段底部插入连接管段顶部，阀门管段底端为防喷阀座，阀门管段底面设有防喷阀盖，防喷阀盖边沿转动连接阀门管段底面边沿，防喷阀盖底面设有扭簧，扭簧一端连接防喷阀盖底面，扭簧另一端连接连接管段内壁。
优选的，阀门管段底部为公头段，连接管段顶部为母头段，连接管底部为出口段，母头段内径大于出口段。
优选的，公头段的长度与防喷阀盖直径的和≤母头段的长度。
优选的，防喷阀盖可以是可以弹性变形的结构，
当防喷阀盖处于开启状态下，防喷阀盖为弧形，防喷阀盖贴靠母头段内壁，
当防喷阀盖处于关闭状态下，防喷阀盖为板状。
优选的，还包括圆柱销，圆柱销设于防喷阀盖底面，圆柱销贯穿防喷阀盖、扭簧。
优选的，阀门管段和连接管段螺纹连接，公头段外壁顶部和母头段内壁顶部均设有相互适配的螺纹。
优选的，防喷阀座的密封面为自顶至底直径逐渐增大的第一斜面，防喷阀盖的密封面为第二斜面，第一斜面适配第二斜面。
本发明的有益效果：
1、本发明可以减少瓦斯的泄漏。
2、本发明结构简单，可靠性好。
3、本发明能够允许大直径工具通过。
附图说明
图1为内防喷保瓦斯接头开启时的剖视图；
图2为内防喷保瓦斯接头关闭时的剖视图；
图3为取芯工作的示意图。
图中：1-卷盘装置、2-传递装置、3-取芯器、4-钻杆、5-防喷盒、6-钻杆驱动装置、701-阀门管段、702-连接管段、703-母头段、704-出口段、705-公头段、706-防喷阀座、707-防喷阀盖、708-扭簧、709-圆柱销、710-第一斜面、711-第二斜面、8-牵拉组件、9-注入头、10-内管总成。
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1～3所示，本发明公开了一种适用于取芯器的内防喷瓦斯接头，
内防喷保瓦斯接头包括阀门管段701、连接管段702，阀门管段701与连接管段702可拆卸连接，阀门管段701底端为公头，连接管段702顶端为母头，
连接管段702顶部为母头段703，连接管段702底部为出口段704，母头段703内径大于出口段704，出口段704内径大于内管总成外径，
阀门管段701底部为公头段705，阀门管段701底端为防喷阀座706，阀门管段701底面设有防喷阀盖707，防喷阀盖707边沿转动连接阀门管段701底面边沿，防喷阀盖707底面设有扭簧708，扭簧708一端连接防喷阀盖707，扭簧708另一端连接母头段703内壁，防喷阀座706的密封面为自顶至底直径逐渐增大的第一斜面710，防喷阀盖707的密封面为第二斜面711，第一斜面710适配第二斜面711，
为了更好的固定扭簧708与防喷阀盖707，设有圆柱销709，圆柱销709设 于防喷阀盖707底面，圆柱销709贯穿防喷阀盖707、扭簧708中间，
公头段705的长度与防喷阀盖707直径的和≤母头段703的长度，当本发明处于开启状态下，即防喷阀盖707处于竖直状态时，防喷阀盖707还处于母头段703内，
防喷阀盖707可以是可以变形的结构，当防喷阀盖707被内管总成顶开时，防喷阀盖707可以变为弧形，进而贴紧母头段703内壁，使得装置结构更加紧凑。
连续导管作业装备包括卷盘装置1、传递装置2，
卷盘装置1用于传递绳索、连续导管等牵拉组件8，
传递装置2包括注入头9、防喷盒5、钻杆驱动装置6，钻杆驱动装置6通过钻杆4驱动取芯器的外管总成转动、下压，防喷盒5设于钻杆4顶端，防止瓦斯喷发，注入头9驱动牵拉组件8进而完成取芯器3的内管总成10的升降运动，牵拉组件8穿过防喷盒5进入钻杆4。
实际工作时，使用钻杆驱动装置6卡住钻杆4顶部外周，将牵拉组件8连接内管总成10后，将内管总成10从钻杆4放入、下降，使得内管总成10进入外管总成，
当内管总成10进入内防喷保瓦斯接头前，防喷阀盖707在扭簧708的作用下处于水平状态，内防喷保瓦斯接头处于关闭状态，
当内管总成10进入内防喷保瓦斯接头后，内管总成10顶开防喷阀盖707，由于防喷阀盖707为容易形变的结构，防喷阀盖707贴紧内防喷保瓦斯接头内壁，
当内管总成10退出内防喷保瓦斯接头后，防喷阀盖707在扭簧708的作用下恢复水平状态，防喷阀盖707恢复为平板状态，内防喷保瓦斯接头关闭。
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 (7)

  1. 一种矿山用内防喷保瓦斯接头，其特征在于：包括本体，本体安装在钻杆底部，本体包括自顶至底设置的阀门管段、连接管段，阀门管段底部插入连接管段顶部，阀门管段底端为防喷阀座，阀门管段底面设有防喷阀盖，防喷阀盖边沿转动连接阀门管段底面边沿，防喷阀盖底面设有扭簧，扭簧一端连接防喷阀盖底面，扭簧另一端连接连接管段内壁。
  2. 根据权利要求1所述的接头，其特征在于：阀门管段底部为公头段，连接管段顶部为母头段，连接管底部为出口段，母头段内径大于出口段。
  3. 根据权利要求2所述的接头，其特征在于：公头段的长度与防喷阀盖直径的和≤母头段的长度。
  4. 根据权利要求3所述的接头，其特征在于：防喷阀盖可以是可以弹性变形的结构，
    当防喷阀盖处于开启状态下，防喷阀盖为弧形，防喷阀盖适配母头段内壁，
    当防喷阀盖处于关闭状态下，防喷阀盖为板状。
  5. 根据权利要求1所述的接头，其特征在于：还包括圆柱销，圆柱销设于防喷阀盖底面，圆柱销贯穿防喷阀盖、扭簧。
  6. 根据权利要求2所述的接头，其特征在于：阀门管段和连接管段螺纹连接，公头段外壁顶部和母头段内壁顶部均设有相互适配的螺纹。
  7. 根据权利要求1～6中任一所述的接头，其特征在于：防喷阀座的密封面为自顶至底直径逐渐增大的第一斜面，防喷阀盖的密封面为第二斜面，第一斜面适配第二斜面。
PCT/CN2021/073845 2020-04-27 2021-01-26 一种矿山用内防喷保瓦斯接头 WO2021218253A1 (zh)

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Application Number Priority Date Filing Date Title
US17/997,275 US20230175339A1 (en) 2020-04-27 2021-01-26 Internal blowout-prevention gas-retaining connector for mine

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CN202010345496.1A CN111485854A (zh) 2020-04-27 2020-04-27 一种矿山用内防喷保瓦斯接头
CN202010345496.1 2020-04-27

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