公开(公告)号：EP0960254A4

公开(公告)日：2000-11-22

申请号：EP98906021

申请日：1998-01-28

申请人： HOLTE ARDIS L

发明人： HOLTE ARDIS L

IPC分类号： E21B10/26 ,  E21B4/14 ,  E21B10/32 ,  E21B10/36 ,  E21B10/66 ,  E21B21/16 ,  E21B10/40 ,  E21B21/00

CPC分类号： E21B10/36 ,  E21B4/14 ,  E21B10/32 ,  E21B10/66 ,  E21B21/16

摘要： A reverse circulation, pneumatic drilling assembly (10) wherein the bit assembly (11) is operatively connected to a dual wall pipe assembly (12). A supply of compressed air is conducted through the annulus of the dual wall pipe assembly (12) to a downhole pneumatic hammer (17). Exhaust air from the downhole pneumatic hammer is directed to the bit assembly (11) for continuous removal of drilling debris through a central evacuation tube of the dual wall pipe assembly (12).

摘要翻译： 反循环气动钻井组件（10），其中钻头组件（11）可操作地连接到双壁管道组件（12）。 压缩空气供应通过双壁管道组件（12）的环形空间传导到井下气动锤（17）。 来自井下气动锤的排气被引导至钻头组件（11），以通过双壁管道组件（12）的中央排气管连续移除钻屑。

公开(公告)号：EP0847477A1

公开(公告)日：1998-06-17

申请号：EP97932181.0

申请日：1997-06-11

申请人： Holte, Ardis L.

发明人： Holte, Ardis L.

IPC分类号： E21B10 ,  E21B4 ,  E21B21

CPC分类号： E21B21/16 ,  E21B4/14 ,  E21B10/32 ,  E21B10/36 ,  E21B10/66

摘要： A drill bit assembly (1) includes a driver (2) adapted for attachment to a down hole pneumatic hammer. A pilot bit (30) is coupled to the driver (2) in a manner permitting rotational and axial movement between driver (2) and pilot bit (30). A series of underreamer arms (19) are disposed intermediate the driver (2) and the pilot bit (30) and engage a centrally disposed cam block (18) on the pilot bit (30). Pivot pins (21) of the underreamer arms (19) are journaled in and move with the driver (2) during partial rotation of the driver during arm deployment and retraction. Passageways (39) in the driver and pilot bit direct compressed air to the working surface of the bit for discharging particles upwardly through channels (41) in the bit and driver. Inclined surfaces (23a) on the underreamer arms (19) cooperate with the lower end of a casing (C) to contribute to arm retraction prior to removal of the assembly through the casing.

公开(公告)号：EP1101013A1

公开(公告)日：2001-05-23

申请号：EP99937399.6

申请日：1999-07-23

申请人： Holte, Ardis L.

发明人： Holte, Ardis L.

IPC分类号： E21B10/66

CPC分类号： E21B10/32 ,  E21B4/14 ,  E21B4/20 ,  E21B6/04 ,  E21B7/002 ,  E21B7/20 ,  E21B7/208 ,  E21B10/327 ,  E21B10/36 ,  E21B10/40 ,  E21B10/66 ,  E21B21/12 ,  E21B21/16 ,  E21B44/02

摘要： An underreamer drill bit assembly including a pilot bit (82) and extendable underreamer arms (88) operatively connected to the pilot bit (82). The underreaming arms (88) have an extended position for underreaming, and a retracted position in which the overall diameter of the underreamer drill bit assembly is less than the inside diameter of the well casing, permitting the entire bit assembly to be withdrawn through the well casing. In another aspect of the invention, the bit assembly is operatively connected to a dual wall pipe assembly (12). A supply of compressed air is conducted through the annulus (24) of the dual wall pipe assembly (12) to a down hole pneumatic hammer (13). Exhaust air from the down hole hammer is directed to the bit assembly for continuous removal of drilling debris through a central evacuation tube (43) of the dual wall pipe assembly. In another aspect of the invention, a pressurized, incompressible fluid is injected into the annulus between the well casing and the downhole pneumatic hammer.

公开(公告)号：EP0837979A4

公开(公告)日：2000-08-02

申请号：EP97923592

申请日：1997-05-06

申请人： HOLTE ARDIS L

发明人： HOLTE ARDIS L

IPC分类号： E21B4/06 ,  E21B10/36 ,  E21B17/07

CPC分类号： E21B17/076 ,  E21B4/06

摘要： A down hole hammer assembly for percussive drilling of ground holes has a drill bit (23) slidably carried in a chuck (22) housed within a barrel (21) of the assembly. Drill bit (23) travel is limited by a retainer sleeve (24) in place about a reduced segment (25) of the drill bit. The sleeve (24) includes a ring portion (24A) limiting bit travel and a skirt portion (26) for confinement within a component of the hammer assembly to prevent loss of the retainer sleeve (24) and drill bit during barrel (21) separation.

摘要翻译： 用于冲击钻孔地下孔的井下锤组件具有可滑动地承载在容纳在组件的筒（21）内的卡盘（22）中的钻头（23）。 钻头（23）的行程受到保持套筒（24）围绕钻头的缩小部分（25）就位的限制。 套筒（24）包括限制钻头行程的环形部分（24A）和用于限制在锤组件的部件内的裙部（26），以防止在筒（21）分离期间保持器套筒（24）和钻头损失 。

公开(公告)号：EP0996810A1

公开(公告)日：2000-05-03

申请号：EP98935684.5

申请日：1998-07-17

申请人： Holte, Ardis L.

发明人： Holte, Ardis L.

IPC分类号： E21B10/66

CPC分类号： E21B10/66 ,  E21B10/327

摘要： An underreamer drill bit assembly including a pilot bit (82) and extendable underreaming arms (88) operatively connected to the pilot bit (82). The underreaming arms (88) have an extended position for underreaming, and a retracted position in which the overall diameter of the underreamer drill bit assembly is less than the inside diameter of the well casing, permitting the entire bit assembly to be withdrawn through the well casing. In another aspect of the invention, the bit assembly is operatively connected to a dual wall pipe assembly (12). A supply of compressed air is conducted through the annulus (24) of the dual wall pipe assembly (12) to a down hole pneumatic hammer (13). Exhaust air from the down hole hammer (13) is directed to the bit assembly for continuous removal of drilling debris through a central evacuation tube (43) of the dual wall pipe assembly.

摘要翻译： 包括导向钻头（82）和可操作地连接到导向钻头（82）的可延伸的下流臂（88）的扩口钻头组件。 下流臂（88）具有用于下流的延伸位置和缩回位置，在该缩回位置中，扩孔器钻头组件的总直径小于井套管的内径，从而允许整个钻头组件从井中抽出 套管。 在本发明的另一方面，钻头组件可操作地连接到双壁管道组件（12）。 压缩空气供应通过双壁管道组件（12）的环形空间（24）传导到井下气动锤（13）。 来自井下锤（13）的排气被引导至钻头组件，以通过双壁管组件的中央抽空管（43）连续移除钻屑。

公开(公告)号：EP1101013A4

公开(公告)日：2002-06-26

申请号：EP99937399

申请日：1999-07-23

申请人： HOLTE ARDIS L

发明人： HOLTE ARDIS L

IPC分类号： E21B10/66 ,  E21B4/14 ,  E21B4/20 ,  E21B6/04 ,  E21B7/00 ,  E21B7/20 ,  E21B10/32 ,  E21B10/36 ,  E21B10/40 ,  E21B21/12 ,  E21B21/16 ,  E21B44/02

CPC分类号： E21B10/32 ,  E21B4/14 ,  E21B4/20 ,  E21B6/04 ,  E21B7/002 ,  E21B7/20 ,  E21B7/208 ,  E21B10/327 ,  E21B10/36 ,  E21B10/40 ,  E21B10/66 ,  E21B21/12 ,  E21B21/16 ,  E21B44/02

摘要： An underreamer drill bit assembly including a pilot bit (82) and extendable underreamer arms (88) operatively connected to the pilot bit (82). The underreaming arms (88) have an extended position for underreaming, and a retracted position in which the overall diameter of the underreamer drill bit assembly is less than the inside diameter of the well casing, permitting the entire bit assembly to be withdrawn through the well casing. In another aspect of the invention, the bit assembly is operatively connected to a dual wall pipe assembly (12). A supply of compressed air is conducted through the annulus (24) of the dual wall pipe assembly (12) to a down hole pneumatic hammer (13). Exhaust air from the down hole hammer is directed to the bit assembly for continuous removal of drilling debris through a central evacuation tube (43) of the dual wall pipe assembly. In another aspect of the invention, a pressurized, incompressible fluid is injected into the annulus between the well casing and the downhole pneumatic hammer.

公开(公告)号：EP0960254A1

公开(公告)日：1999-12-01

申请号：EP98906021.0

申请日：1998-01-28

申请人： Holte, Ardis L.

发明人： Holte, Ardis L.

IPC分类号： E21B10 ,  E21B4 ,  E21B21

CPC分类号： E21B10/36 ,  E21B4/14 ,  E21B10/32 ,  E21B10/66 ,  E21B21/16

摘要： A reverse circulation, pneumatic drilling assembly (10) wherein the bit assembly (11) is operatively connected to a dual wall pipe assembly (12). A supply of compressed air is conducted through the annulus of the dual wall pipe assembly (12) to a downhole pneumatic hammer (17). Exhaust air from the downhole pneumatic hammer is directed to the bit assembly (11) for continuous removal of drilling debris through a central evacuation tube of the dual wall pipe assembly (12).

摘要翻译： 反循环气动钻井组件（10），其中钻头组件（11）可操作地连接到双壁管道组件（12）。 压缩空气供应通过双壁管道组件（12）的环形空间传导到井下气动锤（17）。 来自井下气动锤的排气被引导至钻头组件（11），以通过双壁管道组件（12）的中央排气管连续移除钻屑。

公开(公告)号：EP0847477A4

公开(公告)日：1999-06-09

申请号：EP97932181

申请日：1997-06-11

申请人： HOLTE ARDIS L

发明人： HOLTE ARDIS L

IPC分类号： E21B10/26 ,  E21B4/14 ,  E21B10/32 ,  E21B10/36 ,  E21B10/66 ,  E21B21/16

CPC分类号： E21B21/16 ,  E21B4/14 ,  E21B10/32 ,  E21B10/36 ,  E21B10/66

摘要： A drill bit assembly (1) includes a driver (2) adapted for attachment to a down hole pneumatic hammer. A pilot bit (30) is coupled to the driver (2) in a manner permitting rotational and axial movement between driver (2) and pilot bit (30). A series of underreamer arms (19) are disposed intermediate the driver (2) and the pilot bit (30) and engage a centrally disposed cam block (18) on the pilot bit (30). Pivot pins (21) of the underreamer arms (19) are journaled in and move with the driver (2) during partial rotation of the driver during arm deployment and retraction. Passageways (39) in the driver and pilot bit direct compressed air to the working surface of the bit for discharging particles upwardly through channels (41) in the bit and driver. Inclined surfaces (23a) on the underreamer arms (19) cooperate with the lower end of a casing (C) to contribute to arm retraction prior to removal of the assembly through the casing.

公开(公告)号：EP0837979A1

公开(公告)日：1998-04-29

申请号：EP97923592.0

申请日：1997-05-06

申请人： Holte, Ardis L.

发明人： Holte, Ardis L.

IPC分类号： E21B4 ,  E21B10 ,  E21B17

CPC分类号： E21B17/076 ,  E21B4/06

摘要： A down hole hammer assembly for percussive drilling of ground holes has a drill bit (23) slidably carried in a chuck (22) housed within a barrel (21) of the assembly. Drill bit (23) travel is limited by a retainer sleeve (24) in place about a reduced segment (25) of the drill bit. The sleeve (24) includes a ring portion (24A) limiting bit travel and a skirt portion (26) for confinement within a component of the hammer assembly to prevent loss of the retainer sleeve (24) and drill bit during barrel (21) separation.

摘要翻译： 用于冲击钻孔地下孔的井下锤组件具有可滑动地承载在容纳在组件的筒（21）内的卡盘（22）中的钻头（23）。 钻头（23）的行程受到保持套筒（24）围绕钻头的缩小部分（25）就位的限制。 套筒（24）包括限制钻头行程的环形部分（24A）和用于限制在锤组件的部件内的裙部（26），以防止在筒（21）分离期间保持器套筒（24）和钻头损失 。