Abstract: A fluid pressure driven, high frequency percussion hammer for drilling in hard formations is presented. The hammer piston (20) of the percussion hammer has a relatively large and longitudinally extending bore (41) that provides minimal flow resistance for a drilling fluid flowing through the bore (41) during the return stroke of the hammer piston (20). The bore (41) is closeable in the upstream direction by a valve plug (23) that follows the hammer piston (20) during the stroke. The valve plug (23) is controlled by a relatively long and slender valve stem (49) that is mechanically able to stop the valve plug (23) by approximately 75% of the full stroke length of the hammer piston (20) and separates the plug (23) from a seat ring (40). Thus the bore (41) opens up such that the bore fluid can flow there trough, and the inherent tension spring properties of the valve stem (49) returns the valve plug (23) so rapid that it will be good through flow during return of the hammer piston (20).

Abstract: A fluid pressure driven, high frequency percussion hammer for drilling in hard formations is presented. The hammer piston (20) of the percussion hammer has a relatively large and longitudinally extending bore (41) that provides minimal flow resistance for a drilling fluid flowing through the bore (41) during the return stroke of the hammer piston (20). The bore (41) is closeable in the upstream direction by a valve plug (23) that follows the hammer piston (20) during the stroke. The valve plug (23) is controlled by a relatively long and slender valve stem (49) that is mechanically able to stop the valve plug (23) by approximately 75% of the full stroke length of the hammer piston (20) and separates the plug (23) from a seat ring (40). Thus the bore (41) opens up such that the bore fluid can flow there trough, and the inherent tension spring properties of the valve stem (49) returns the valve plug (23) so rapid that it will be good through flow during return of the hammer piston (20).

Abstract: An apparatus for gripping a cylindrical member is provided. In one embodiment, an apparatus includes a clamping device having clamping dies that enable the clamping device to grip a tubular string. The clamping dies have clamping faces configured to adapt to curvature of the tubular string when the clamping dies engage the tubular string via the clamping faces to facilitate use of the clamping device with tubular strings of different external diameters. Additional devices, systems, and methods are also disclosed.

Abstract: A fluid pressure driven, high frequency percussion hammer for drilling in hard formations is presented. The hammer piston (20) of the percussion hammer has a relatively large and longitudinally extending bore (41) that provides minimal flow resistance for a drilling fluid flowing through the bore (41) during the return stroke of the hammer piston (20). The bore (41) is closeable in the upstream direction by a valve plug (23) that follows the hammer piston (20) during the stroke. The valve plug (23) is controlled by a relatively long and slender valve stem (49) that is mechanically able to stop the valve plug (23) by approximately 75% of the full stroke length of the hammer piston (20) and separates the plug (23) from a seat ring (40). Thus the bore (41) opens up such that the bore fluid can flow there trough, and the inherent tension spring properties of the valve stem (49) returns the valve plug (23) so rapid that it will be good through flow during return of the hammer piston (20).

Abstract: Arrangement in a hose connector of a riser provided between a wellhead and a floating surface installation. One or more hoses form a flexible fluid communicating connection between an upper portion of the riser and the floating surface installation. The first end portion of at least one fluid conduit is fixed to the riser by an upwardly directed, first pipe muzzle and is provided with a rotatable connecting sleeve. Each of one or more flexible hoses is connected to a conduit spool of a connecting assembly provided with a second and pipe muzzle that is arranged for releasable mating with the first end portion of the fluid conduit. A lifting yoke is connected to the connecting assembly and forms an actuator which is able to effect rotary motion to the connecting sleeve to enable engagement.

Abstract: An apparatus for gripping a cylindrical member is provided. In one embodiment, an apparatus includes a clamping device having clamping dies that enable the clamping device to grip a tubular string. The clamping dies have clamping faces configured to adapt to curvature of the tubular string when the clamping dies engage the tubular string via the clamping faces to facilitate use of the clamping device with tubular strings of different external diameters. Additional devices, systems, and methods are also disclosed.

Abstract: A device for a top drive drilling machine, in which a drive shaft, which is arranged for releasable connection to a drive and to a first end portion of a drill pipe, is provided with a centre bore extending therethrough and arranged for fluid communication between the drilling mud plant and a fluid bore in the drill pipe. First and second releasable, drive-shaft-surrounding, respectively drill-string-surrounding, pressure seals and a valve which is arranged to provide, in an open position, a passage for the drill pipe or drive shaft, form a first and a second chamber. A drilling mud inlet is arranged for the second chamber and is arranged for fluid communication between the drilling mud plant and connection housing. A method for the continuous supply of drilling mud to a drill string by the use of the drilling machine.

Abstract: A fluid pressure driven, high frequency percussion hammer for drilling in hard formations is presented. The hammer piston (20) of the percussion hammer has a relatively large and longitudinally extending bore (41) that provides minimal flow resistance for a drilling fluid flowing through the bore (41) during the return stroke of the hammer piston (20). The bore (41) is closeable in the upstream direction by a valve plug (23) that follows the hammer piston (20) during the stroke. The valve plug (23) is controlled by a relatively long and slender valve stem (49) that is mechanically able to stop the valve plug (23) by approximately 75% of the full stroke length of the hammer piston (20) and separates the plug (23) from a seat ring (40). Thus the bore (41) opens up such that the bore fluid can flow there trough, and the inherent tension spring properties of the valve stem (49) returns the valve plug (23) so rapid that it will be good through flow during return of the hammer piston (20).

Abstract: Arrangement in a hose connector of a riser provided between a wellhead and a floating surface installation. One or more hoses form a flexible fluid communicating connection between an upper portion of the riser and the floating surface installation. The first end portion of at least one fluid conduit is fixed to the riser by an upwardly directed, first pipe muzzle and is provided with a rotatable connecting sleeve. Each of one or more flexible hoses is connected to a conduit spool of a connecting assembly provided with a second and pipe muzzle that is arranged for releasable mating with the first end portion of the fluid conduit. A lifting yoke is connected to the connecting assembly and forms an actuator which is able to effect rotary motion to the connecting sleeve to enable engagement.

Abstract: A device for cleaning and doping (lubrication) equipment for threads of the type used to join pipes to a pipe string, especially in connection with petroleum production, where cleaning fluid and dope (lubricant) are sprayed at the threads at relatively high pressure from at least one nozzle mounted in the rotatable make-up section of a power tong, and where at least one injection pump arranged to supply cleaning fluid or dope to the at least one nozzle is located in the rotatable make-up section.

Abstract: Clamping die (15) in a device for engagement with a cylindrical body (4), which clamping die (15) includes a gripping surface (153) that is arranged to be able to extend in parallel with the center axis of the cylindrical body (4), wherein a groove (154) is provided in each of two side surfaces (151) adjacent to the gripping surface (153) and in close proximity to the gripping surface (153), said groove (154) extending substantially in parallel with the gripping surface (153).

Abstract: A device for a top drive drilling machine, in which a drive shaft (14), which is arranged for releasable connection to a drive (12) and to a first end portion (51) of a drill pipe (5), is provided with a center bore (141) extending therethrough and arranged for fluid communication between the drilling mud plant (6) and a fluid bore (53) in the drill pipe (5). First and second releasable, drive-shaft-surrounding, respectively drill-string-surrounding, pressure seals (1311c, 1321) and a valve (133) which is arranged to provide, in an open position, a passage (1331) for the drill pipe (5) or drive shaft (14), form a first and a second chamber. A drilling mud inlet (1323) is arranged for the second chamber (132) and is arranged for fluid communication between the drilling mud plant (6) and connection housing (13). A method for the continuous supply of drilling mud to a drill string (4) by the use of the drilling machine.

Abstract: Arrangement in a hose connector of a riser (2) provided between a wellhead and a floating surface installation (1). One or more hoses (3) form a flexible fluid communicating connection between an upper portion of the riser (2) and the floating surface installation (1). The first end portion (211) of at least one fluid conduit (21) is fixed to the riser (2) by an upwardly directed, first pipe muzzle (212) and is provided with a rotatable connecting sleeve (213a, 213b, 213c). Each of one or more flexible hoses (3) is connected to a conduit spool (41) of a connecting assembly (4) provided with a second pipe muzzle (42) that is arranged for releasable mating with the first end portion (211) of the fluid conduit (21). A lifting yoke (43) is connected to the connecting assembly (4) and forms an actuator (431) which is able to effect rotary motion to the connecting sleeve (213a, 213b, 213c) to enable engagement.

Abstract: A device for cleaning and doping (lubrication) equipment for threads (3b, 4b) of the type used to join pipes (4) to a pipe string (3), especially in connection with petroleum production, where cleaning fluid and dope (lubricant) are sprayed at the threads (3b, 4b) at relatively high pressure from at least one nozzle (5, 6) mounted in the rotatable make-up section (1) of a power tong, and where at least one injection pump (7, 8) arranged to supply cleaning fluid or dope to the at least one nozzle (5, 6) is located in the rotatable make-up section (1).

Abstract: A hydraulic circuit device for activating the at least one clamping die (14) of a power tong (1), the power tong (1) including two housing halves (2), pivotable relative to each other, the housing halves (2) being arranged to be pivoted between a closed, active position and an open, inactive position, and a radially divided drive ring (6, 8) which is provided with the at least one hydraulically activated clamping die (14) directed towards the centre axis (10) of the power tong (1), being placed in the housing halves (2), the drive ring (6, 8) being supported and connected to at least one driving motor (12) for the rotation of the drive ring (6, 8) about the centre axis (10), and a hydraulic pump cylinder (16) being articulatedly connected between the first drive ring part (6) of the drive ring (6, 8) and the second drive ring part (8) of the drive ring (6, 8) and arranged to rotate together with the drive ring (6, 8) about the centre axis (10).

Abstract: Arrangement in a hose connector of a riser (2) provided between a wellhead and a floating surface installation (1). One or more hoses (3) form a flexible fluid communicating connection between an upper portion of the riser (2) and the floating surface instalation (1). The first end portion (211) of at least one fluid conduit (21) is fixed to the riser (2) by an upwardly directed, first pipe muzzle (212) and is provided with a rotatable connecting sleeve (213a, 213c). Each of one or more flexible hoses (3) is connected to a conduit spool (41) of a connecting assembly (4) provided with a second and pipe muzzle (42) that is arranged for releasable mating with the first end portion (211) of the fluid conduit (21). A lifting yoke (43) is connected to the connecting assembly (4) and forms an actuator (431) which is able to effect rotary motion to the connecting sleeve (213a, 213b, 213e) to enable engagement.

Abstract: Clamping die (15) in a device for engagement with a cylindrical body (4), which clamping die (15) includes a gripping surface (153) that is arranged to be able to extend in parallel with the centre axis of the cylindrical body (4), wherein a groove (154) is provided in each of two side surfaces (151) adjacent to the gripping surface (153) and in close proximity to the gripping surface (153), said groove (154) extending substantially in parallel with the gripping surface (153).

Abstract: A power tong (1) device, in which the power tong (1) includes two housing halves (2), pivotable relative to each other, the housing halves (2) being arranged to be pivoted between a closed, active position and an open, inactive position, and in which a radially divided drive ring (6, 8), which is provided with hydraulically activated clamping dies (14) directed towards the centre axis (10) of the power tong (1), is placed in the housing halves, the drive ring (6, 8) being supported and connected to a driving motor (12) for the rotation of the drive ring (6, 8) about said axis (10), the drive ring (6, 8) being provided with at least one locking means (16) which is arranged to interconnect the parts of the drive ring (6, 8) in a releasable manner.

Abstract: A device for a top drive drilling machine, in which a drive shaft (14), which is arranged for releasable connection to a drive (12) and to a first end portion (51) of a drill pipe (5), is provided with a centre bore (141) extending therethrough and arranged for fluid communication between the drilling mud plant (6) and a fluid bore (53) in the drill pipe (5). First and second releasable, drive-shaft-surrounding, respectively drill-string-surrounding, pressure seals (1311c, 1321) and a valve (133) which is arranged to provide, in an open position, a passage (1331) for the drill pipe (5) or drive shaft (14), form a first and a second chamber. A drilling mud inlet (1323) is arranged for the second chamber (132) and is arranged for fluid communication between the drilling mud plant (6) and connection housing (13). A method for the continuous supply of drilling mud to a drill string (4) by the use of the drilling machine.

Abstract: A hydraulic circuit device for activating the at least one clamping die (14) of a power tong (1), the power tong (1) including two housing halves (2), pivotable relative to each other, the housing halves (2) being arranged to be pivoted between a closed, active position and an open, inactive position, and a radially divided drive ring (6, 8) which is provided with the at least one hydraulically activated clamping die (14) directed towards the centre axis (10) of the power tong (1), being placed in the housing halves (2), the drive ring (6, 8) being supported and connected to at least one driving motor (12) for the rotation of the drive ring (6, 8) about the centre axis (10), and a hydraulic pump cylinder (16) being articulatedly connected between the first drive ring part (6) of the drive ring (6, 8) and the second drive ring part (8) of the drive ring (6, 8) and arranged to rotate together with the drive ring (6, 8) about the centre axis (10).