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    HYDRAULIC DOWN-THE-HOLE HAMMER AND SUBSEA PILE
    2.
    发明公开
    HYDRAULIC DOWN-THE-HOLE HAMMER AND SUBSEA PILE 审中-公开

    公开(公告)号：EP4411072A2

    公开(公告)日：2024-08-07

    申请号：EP24183706.1

    申请日：2022-04-28

    申请人： Mincon International Limited

    发明人： KESKINIVA, Markku ,  PURCELL, Joseph ,  DUCK, Simon

    IPC分类号： E02D5/34

    CPC分类号： E02D5/34 ,  E02D7/06 ,  E02D7/28 ,  E02D15/08 ,  E02D27/525 ,  E21B4/14

    摘要： The present invention relates to a hydraulic down-the-hole hammer. The hammer comprises an elongate shaft and a piston having a central bore therethrough, the piston slidably mounted for reciprocal movement on the shaft and arranged to impact a percussion bit. Forward and rear drive chambers for the piston are disposed between the piston and the shaft and the forward chamber is separated from the rear chamber by an annular shoulder formed internally of the piston bore. The hammer also comprises a control valve to control reciprocation of the piston, wherein the control valve is arranged within the central bore of the piston. The hammer may be a disposable water hammer in which the piston is an outermost component of the hammer.
    The invention also relates to a method and system for installing a load-bearing element in a seabed, a method and system for installing a subsea anchor on a seabed, a subsea pile and a subsea anchor.

    A DRILL BIT ASSEMBLY FOR FLUID-OPERATED PERCUSSION DRILL TOOLS
    4.
    发明公开
    A DRILL BIT ASSEMBLY FOR FLUID-OPERATED PERCUSSION DRILL TOOLS 审中-公开
    BOHRSPITZENANORDNUNG用于液体动力冲击钻

    公开(公告)号：EP2473698A1

    公开(公告)日：2012-07-11

    申请号：EP10747235.9

    申请日：2010-08-31

    申请人： Mincon International Ltd.

    发明人： PURCELL, Joseph

    IPC分类号： E21B10/36 ,  E21B17/07

    CPC分类号： E21B10/36 ,  E21B17/0426 ,  E21B17/076

    摘要： The present invention relates to a drill bit assembly for fluid-operated percussion drill tools comprising a percussion bit (1) having a head portion (3) formed with an axially extending stub shank (32); axially extending splines (36) on the stub shank (32) slideably engageable with complementary splines (35) formed on a drive chuck (4) whereby rotational drive from the chuck (4) may be transmitted to the stub shank (32); bit retaining means adapted for engagement with complementary retaining means on the stub shank to retain the stub shank in the drill bit assembly; and engagement means on the chuck (4) adapted for connecting the chuck (4) to a drive means (5) of the fluid-operated percussion drill tool. The bit retaining means comprises a bit retaining ring (41), and the complementary retaining means comprises a retaining shoulder (37) on the stub shank, wherein the bit retaining ring is arranged to engage the retaining shoulder to retain the stub shank in the drill bit assembly. A portion (42) of the bit retaining ring (41) adapted to engage the retaining shoulder (37) to retain the stub shank (32) in the drill bit assembly is disposed within the chuck (4).

    A DOWN-THE-HOLE HAMMER
    9.
    发明公开
    A DOWN-THE-HOLE HAMMER 有权
    一个下陷的锤子

    公开(公告)号：EP2627850A2

    公开(公告)日：2013-08-21

    申请号：EP11770773.7

    申请日：2011-10-17

    申请人： Mincon International

    发明人： PURCELL, Joseph

    IPC分类号： E21B4/14 ,  E21B17/07 ,  E21B10/36

    CPC分类号： E21B4/14 ,  E21B6/08 ,  E21B17/076

    摘要： The present invention relates to a down-the-hole hammer comprising an external cylindrical outer wear sleeve, a sliding piston mounted for reciprocating movement within the outer wear sleeve to strike a percussion bit of a drill bit assembly located at the forward end of the outer wear sleeve. The drill bit assembly comprises a percussion bit having a head portion formed with an axially extending stub shank; axially extending splines on the stub shank slideably engageable with complementary splines formed on a drive chuck whereby rotational drive from the chuck may be transmitted to the stub shank; a bit retaining ring adapted for engagement with a retaining shoulder on the stub shank to retain the stub shank in the drill bit assembly; and engagement means on the chuck adapted for connecting the chuck to a drive means of the fluid-operated percussion drill tool; the bit retaining ring comprises a shoulder for engagement with an upper end of the chuck to hold the retaining ring in place in the assembly. The assembly further comprises a bushing arranged above the chuck. An upper portion of the bushing has an internal diameter dimensioned to provide a sealing fit with the piston nose. The bit retaining ring or the lower portion of the bushing has an internal diameter dimensioned to provide a close sliding fit with the outer diameter of the retaining shoulder on the stub shank.

    摘要翻译： 本发明涉及一种潜孔锤，其包括外部圆柱形外耐磨套筒，滑动活塞，所述滑动活塞安装成在外耐磨套筒内往复运动以撞击位于外部前端的钻头组件的冲击钻头 穿袖子。 该钻头组件包括冲击钻头，该冲击钻头具有形成有轴向延伸的短柄的头部; 短轴柄上的轴向延伸的花键可滑动地与形成在驱动卡盘上的互补花键接合，由此来自卡盘的旋转驱动可传递到短柄柄; 一个保持环，该保持环适于与所述短轴柄上的保持肩部接合，以将所述短柄柄保持在所述钻头组件中; 以及卡盘上的接合装置，其适于将卡盘连接到流体操作冲击钻具的驱动装置; 钻头保持环包括肩部，该肩部用于与卡盘的上端接合以将保持环保持在组件中的适当位置。 该组件还包括布置在卡盘上方的衬套。 衬套的上部具有内径，所述内径的尺寸被设计成与活塞鼻形成密封配合。 钻头保持环或衬套的下部具有内径，该内径的尺寸被设计成与短轴柄上的保持肩的外径形成紧密滑动配合。

    AN ATTACHMENT FOR PERCUSSION DRILL TOOLS
    10.
    发明公开
    AN ATTACHMENT FOR PERCUSSION DRILL TOOLS 有权
    塔冲击钻

    公开(公告)号：EP2603659A2

    公开(公告)日：2013-06-19

    申请号：EP11741245.2

    申请日：2011-08-10

    申请人： Mincon International

    发明人： PURCELL, Joseph

    IPC分类号： E21B4/14 ,  E21B31/03

    CPC分类号： E21B4/14 ,  E21B10/38 ,  E21B21/103 ,  E21B31/03

    摘要： The present invention provides an attachment (1) for a fluid-operated percussion drill tool (2), the drill tool having a backhead assembly (4) for attachment to a drill rod (10). The attachment comprises a shaft (3) attachable to the backhead assembly, wherein the shaft comprises a central bore (16) in fluid communication with a pressure bore of the drill rod. The attachment further comprises a sleeve (5) co-axially slidably mounted on the shaft, the sleeve comprising an outer shoulder (7) at a rear end thereof, and at least one rearwardly-directed exhaust passage. Pressurised air is supplied from the central bore of the shaft to urge the sleeve rearwards into a closed position in which air is prevented from exhausting through the exhaust passage. When a restriction is encountered at the shoulder, the sleeve moves forward to an open position in which air is permitted to exhaust through the exhaust passage adjacent the restriction.