WO2020151206A1 - 一种导流钻杆 - Google Patents

一种导流钻杆 Download PDF

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Publication number
WO2020151206A1
WO2020151206A1 PCT/CN2019/096401 CN2019096401W WO2020151206A1 WO 2020151206 A1 WO2020151206 A1 WO 2020151206A1 CN 2019096401 W CN2019096401 W CN 2019096401W WO 2020151206 A1 WO2020151206 A1 WO 2020151206A1
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Prior art keywords
pressure relief
hole
rod body
channel
drill pipe
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PCT/CN2019/096401
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English (en)
French (fr)
Inventor
朱传奇
袁安营
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安徽理工大学
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Publication of WO2020151206A1 publication Critical patent/WO2020151206A1/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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/18—Pipes provided with plural fluid passages

Definitions

  • the invention relates to the technical field of coal mining, in particular to a diversion drill pipe.
  • the invention provides a diversion drill pipe, which can actively reduce the gas concentration at the bottom of the hole in the drilling process in time and gradually reduce the gas concentration in the coal seam borehole, thereby ensuring the safe construction of the borehole.
  • the present invention provides a diversion drill pipe, which includes a rod body, an air inlet channel and a pressure relief channel are opened inside the rod body along the direction in which the rod body extends, and a pressure relief valve is arranged in the pressure relief channel A pressure relief hole matched with the pressure relief valve is opened on the rod body.
  • the air inlet channel is a circular hole that is coaxial with the rod body along the axis of the rod body, and the pressure relief channel includes a plurality of mutually independent sub-discharge channels opened around the air inlet channel.
  • Pressure channel, each of the sub-pressure relief channels is provided with the pressure relief valve and the pressure relief hole.
  • a plurality of the sub-pressure relief channels are symmetrically arranged around the air inlet channel.
  • the rod body is formed by connecting a plurality of divided rod bodies in series.
  • a plurality of the sub-rods are connected by threads.
  • the pressure relief hole is opened on the innermost sub-rod body relative to the drilled hole, and the pressure relief hole is a hole that is perpendicularly opened from the outer wall of the rod body into the pressure relief channel.
  • a pressure relief channel is provided, and a pressure relief valve is arranged in the pressure relief channel.
  • Figure 1 is a schematic structural diagram of a diversion drill rod provided by an embodiment of the present invention.
  • Figure 2 is a partial cross-sectional view of a diversion drill rod provided by an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a module of a diversion drill pipe provided in the first embodiment of the present invention, which includes a rod body 1, and the inside of the rod body 1 is provided with an air inlet channel 2 and a pressure relief channel 3 along the extending direction of the rod body 1.
  • a pressure relief valve 4 is provided in the pressure relief channel 3, and a pressure relief hole 5 matched with the pressure relief valve 4 is opened on the rod body 1.
  • compressed air enters the bottom of the hole through the air inlet channel 2, and the motor drives the rod body 1 to rotate.
  • the coal powder broken by the drill bit rotates with the drill bit to form a coal flow, which flows out of the hole along the hole wall under wind pressure.
  • the gas in the borehole flows into the pressure relief channel 3 through the pressure relief hole 5.
  • the pressure relief valve opens and the gas is discharged out of the hole through the pressure relief channel 3.
  • the gas pressure in the borehole is high, the gas flow in the pressure relief channel 3 can be adjusted by drilling a drill pipe with a larger pressure relief valve threshold, and the pressure can be gradually relieved to prevent a large amount of sudden gas movement from causing damage to equipment and personnel.
  • the threshold of the pressure relief valve 4 can be selected, for example, 0.1MPa, 0.3MPa, 0.5MPa, 0.7MPa, etc., and the pressure relief valve 4 that matches the threshold can be selected according to specific needs, which can effectively avoid the occurrence of nozzle holes. .
  • the air inlet channel 2 is a circular hole that is coaxial with the rod body 1 along the axis of the rod body 1, and the pressure relief channel 3 includes a plurality of mutually independent openings around the air inlet channel 2
  • Each of the sub-pressure relief channels 31 is provided with a pressure relief valve 4 and a pressure relief hole 5.
  • the plurality of sub-pressure relief channels 31 are symmetrically arranged around the air inlet channel 2.
  • FIG. 2 there may be, for example, two sub-pressure relief channels 31, which are respectively located symmetrically on both sides of the air inlet channel 2, and the sub-pressure relief channels 31 are symmetrically arranged around the air inlet channel 2, so that the drill The pressure discharge in the hole is more even, and the stability of the drill pipe drilling is improved.
  • four sub-pressure relief channels 31 or more may be used, and the specific number is set according to actual needs.
  • the rod body 1 is formed by a plurality of divided rod bodies 11 connected in series.
  • the multiple sub-rods 11 are connected by threads.
  • the rod body 1 is formed by connecting a plurality of sub-rods 11 in series, which can be spliced according to specific drilling length needs to improve the flexibility of on-site response.
  • the sub-rods 11 may be connected by threads, for example.
  • the pressure relief hole 5 is opened on the innermost sub-rod 11 relative to the borehole, and the pressure relief hole 5 is a hole that is perpendicularly opened from the outer wall of the rod 1 to the pressure relief channel 3.
  • the pressure relief hole 5 is opened on the split rod body 11 at the innermost side of the borehole, which can effectively discharge the gas in the borehole out of the borehole, avoiding secondary accumulation of gas in the borehole and affecting the drilling effect.

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  • 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

一种导流钻杆，其包括杆体（1），杆体（1）的内部沿着杆体（1）延伸的方向开设有进风通道（2）以及卸压通道（3），卸压通道（3）内设置有卸压阀（4），杆体（1）上开设有与卸压阀（4）相配合的卸压孔（5）。通过设置卸压通道（3），在卸压通道（3）内设置卸压阀（4），当钻孔内压力超过压力阈值时主动及时降低打钻过程中孔底的瓦斯浓度，杜绝瓦斯超限，防治喷孔、卡钻等事故，同时能逐渐降低钻孔内的瓦斯浓度，防止大量瓦斯突然运动，有效地保证煤层钻孔的安全施工。

Description

一种导流钻杆 技术领域
本发明涉及煤矿开采技术领域，尤其涉及一种导流钻杆。
背景技术
在煤层尤其是高应力下的高瓦斯松软突出煤层中的钻孔施工过程中，极易发生从钻孔中喷出煤和瓦斯的现象，给煤矿的安全、高效生产造成极大的威胁，国内外现有钻杆均没有主动卸压的作用，打钻过程中钻孔内瓦斯易聚集、超限，不能及时有效地降低钻孔内的瓦斯浓度，极易引发喷孔、卡钻等事故，对设备和人员造成危害。
发明内容
本发明提供了一种导流钻杆，可及时主动地降低打钻过程中孔底的瓦斯浓度并逐渐降低煤层钻孔内的瓦斯浓度，保证钻孔的安全施工。
本发明提供了一种导流钻杆，其包括：杆体，所述杆体的内部沿着所述杆体延伸的方向开设有进风通道以及卸压通道，所述卸压通道内设置有卸压阀，所述杆体上开设有与所述卸压阀相配合的卸压孔。
进一步地，所述进风通道为沿着所述杆体的轴线开设与所述杆体同轴的圆形孔体，所述卸压通道包括多条开设于所述进风通道四周相互独立的子卸压通道，每个所述子卸压通道内均设有所述泄压阀以及所述卸压孔。
进一步地，多个所述子卸压通道对称排列于所述进风通道四周。
进一步地，所述杆体由多个分杆体串接而成。
进一步地，多个所述分杆体之间通过螺纹连接。
进一步地，所述卸压孔开设于相对钻孔最内侧的所述分杆体上，所述卸压孔为自所述杆体外壁垂直开设至所述卸压通道内的孔体。
本发明实施例通过设置卸压通道，在卸压通道内设置泄压阀，当钻孔内压力超过压力阈值时主动及时降低打钻过程中孔底的瓦斯浓度，杜绝瓦斯超限， 防治喷孔、卡钻等事故，同时能逐渐降低钻孔内的瓦斯浓度，防治大量瓦斯突然运动，有效地保证煤层钻孔的安全施工。
附图说明
为了更清楚地说明本发明实施例技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种导流钻杆的结构示意图；
图2为本发明实施例提供的一种导流钻杆的局部剖视图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
应当理解，当在本说明书和所附权利要求书中使用时，术语“包括”和“包含”指示所描述特征、整体、步骤、操作、元素和/或组件的存在，但并不排除一个或多个其它特征、整体、步骤、操作、元素、组件和/或其集合的存在或添加。
还应当理解，在此本发明说明书中所使用的术语仅仅是出于描述特定实施例的目的而并不意在限制本发明。如在本发明说明书和所附权利要求书中所使用的那样，除非上下文清楚地指明其它情况，否则单数形式的“一”、“一个”及“该”意在包括复数形式。
参见图1，是本发明实施例一提供的一种导流钻杆的模块示意图，其包括杆体1，杆体1的内部沿着杆体1延伸的方向开设有进风通道2以及卸压通道3，卸压通道3内设置有卸压阀4，杆体1上开设有与卸压阀4相配合的卸压孔5。
具体地，打钻过程中，压缩空气通过进风通道2进入孔底，电机带动杆体1旋转，钻头破碎的煤粉随钻头旋转形成煤流，在风压作用下顺着孔壁流向孔外，钻孔内的瓦斯通过卸压孔5流进卸压通道3，当瓦斯压力超出卸压阀4的阈值时， 卸压阀开启，瓦斯通过卸压通道3排出孔外。当钻孔内瓦斯压力较大时，可通过钻进卸压阀阈值较大的钻杆来调节卸压通道3内的瓦斯流动，逐渐卸压，防止大量瓦斯突然运动对设备及人员造成伤害，彻底消除喷孔隐患。在具体实现中，卸压阀4的阈值可例如有0.1MPa、0.3MPa、0.5MPa、0.7MPa等多种选择，根据具体需要选择相匹配阈值的卸压阀4，可有效避免喷孔的发生。
具体地，通过设置卸压通道，在卸压通道内设置泄压阀，当钻孔内压力超过压力阈值时主动及时降低打钻过程中孔底的瓦斯浓度，杜绝瓦斯超限，防治喷孔、卡钻等事故，同时能逐渐降低钻孔内的瓦斯浓度，防治大量瓦斯突然运动，有效地保证煤层钻孔的安全施工。
参见图2，在一实施例中，进风通道2为沿着杆体1的轴线开设与杆体1同轴的圆形孔体，卸压通道3包括多条开设于进风通道2四周相互独立的子卸压通道31，每个子卸压通道31内均设有泄压阀4以及卸压孔5。
在一实施例中，多个子卸压通道31对称排列于进风通道2四周。
具体地，如图2中所示，可例如有两条子卸压通道31，分别对称位于进风通道2的两侧，将子卸压通道31对称设置于进风通道2的四周，可使钻孔内的压力卸放更加均匀，提高钻杆钻孔的稳定性。在具体实现中，也可例如采用四条子卸压通道31或更多条，具体数量根据实际需要设定。
在一实施例中，杆体1由多个分杆体11串接而成。
在一实施例中，多个分杆体11之间通过螺纹连接。
具体地，杆体1由多个分杆体11串接而成，可根据具体钻孔的长度需要进行拼接，提高现场应对的灵活度，分杆体11之间可例如通过螺纹连接。
在一实施例中，卸压孔5开设于相对钻孔最内侧的分杆体11上，卸压孔5为自杆体1外壁垂直开设至卸压通道3内的孔体。
具体地，卸压孔5开设于相对钻孔最内侧的分杆体11上，可有效的将钻孔内的瓦斯排出钻孔外，避免瓦斯在钻孔内二次聚集，影响钻孔效果。
在本申请所提供的实施例中，应该理解到，所揭露的内容，仅仅是示意性的，可以通过其它的方式实现。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到 各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (6)

  1. 一种导流钻杆，其特征在于，包括：杆体，所述杆体的内部沿着所述杆体延伸的方向开设有进风通道以及卸压通道，所述卸压通道内设置有卸压阀，所述杆体上开设有与所述卸压阀相配合的卸压孔。
  2. 根据权利要求1所述的导流钻杆，其特征在于，所述进风通道为沿着所述杆体的轴线开设与所述杆体同轴的圆形孔体，所述卸压通道包括多条开设于所述进风通道四周相互独立的子卸压通道，每个所述子卸压通道内均设有所述泄压阀以及所述卸压孔。
  3. 根据权利要求2所述的导流钻杆，其特征在于，多个所述子卸压通道对称排列于所述进风通道四周。
  4. 根据权利要求1所述的导流钻杆，其特征在于，所述杆体由多个分杆体串接而成。
  5. 根据权利要求4所述的导流钻杆，其特征在于，多个所述分杆体之间通过螺纹连接。
  6. 根据权利要求5所述的导流钻杆，其特征在于，所述卸压孔开设于相对钻孔最内侧的所述分杆体上，所述卸压孔为自所述杆体外壁垂直开设至所述卸压通道内的孔体。
PCT/CN2019/096401 2019-01-25 2019-07-17 一种导流钻杆 WO2020151206A1 (zh)

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CN109653689A (zh) * 2019-01-25 2019-04-19 安徽理工大学 一种导流钻杆
CN109611072A (zh) * 2019-01-25 2019-04-12 安徽理工大学 一种卸压防突钻机
CN115680516B (zh) * 2023-01-04 2023-04-11 奥瑞拓能源科技股份有限公司 一种导流泄压钻杆

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