The invention relates to a system for laying underground cables or underground lines in the ground near the surface, in a borehole (102) along a laying route (101) between a start point (100) and a target point (110), comprising a boring device (10) comprising an advancing head (12) for creating the borehole (102), a drilling rod (11) and/or a casing (14), wherein the diameter of the advancing head (12) is greater than the diameter of the casing (14) or of the drilling rod (11), so that an annular space (121) is formed between the borehole wall (102) and the casing (14) or the drilling rod (11) and the annular space (121) is provided with lubrication and wherein the advancing head (12) relates to a displacement drilling head (15, 16, 41) or a drilling head system (18) comprising a drilling tool (19) and a drilling tool drive (22) for loosening the ground.

An integrated rotating control device and gas handling system for a marine drilling system is disclosed. The system includes a flow spool; a riser sealing tool coupled to the flow spool; a rotating control device coupled to the riser sealing tool below a tension ring of a riser section of a drilling riser, the rotating control device fluidically coupled to the flow spool; and an auxiliary line routed around the rotating control device between the riser sealing tool and the riser section.

A drill assembly with a drill body coupled to a drilling string and a sonde body having a least one chamber defined therein for receiving locating electronics therein. In disclosed embodiment, the one or more chambers may be provided and the electronics can include a battery, a sensor, a transmitter, an antenna and connecting wires. One or more secure windows may be provided in the sonde body to allow the locating electronics to wirelessly transmit outside of the sonde body. The electronics may be potted within the chamber with a solidifying potting agent to improve durability of the electronics in a drilling environment.

A drill assembly with a drill body coupled to a drilling string and a sonde body having a least one chamber defined therein for receiving locating electronics therein. In disclosed embodiment, the one or more chambers may be provided and the electronics can include a battery, a sensor, a transmitter, an antenna and connecting wires. One or more secure windows may be provided in the sonde body to allow the locating electronics to wirelessly transmit outside of the sonde body. The electronics may be potted within the chamber with a solidifying potting agent to improve durability of the electronics in a drilling environment.

A drilling riser system includes a plurality of interchangeable dockable modules having sealable hydraulic connections configured to connect to a module docking structure disposed in at least one specific segment of a drilling riser and to seal the hydraulic connections. Each of the interchangeable dockable modules includes at least one of an hydraulic termination or connection to an hydraulic device for each of a fluid conduit in fluid communication with the and at least one auxiliary line associated with the riser.

An invented reamer provides an annular body supporting two or more blades wherein each blade includes a spiral section disposed between two tapered sections placed on an exterior of the body. The spiral section fixes a plurality of a one type of cutting insert, e.g., tungsten carbide inserts, and the two tapered sections may each fix cutting inserts of an alternate type, e.g., polydiamond inserts. Certain embodiments provide of the tapered sections have a first flat surface area that extends towards and away from a central longitudinal axis of the annular body and/or a second surface area that positions cutting surfaces of attached cutting inserts linearly along a line that intersects the central longitudinal axis.

An invented reamer provides an annular body supporting two or more blades wherein each blade includes a spiral section disposed between two tapered sections placed on an exterior of the body. The spiral section fixes a plurality of a one type of cutting insert, e.g., tungsten carbide inserts, and the two tapered sections may each fix cutting inserts of an alternate type, e.g., polydiamond inserts. Certain embodiments provide of the tapered sections have a first flat surface area that extends towards and away from a central longitudinal axis of the annular body and/or a second surface area that positions cutting surfaces of attached cutting inserts linearly along a line that intersects the central longitudinal axis.

The present invention relates to a method for riser string handling on an offshore drilling vessel (1), the offshore drilling vessel comprising a multiple firing line hoist system, a riser tensioner system (50) arranged in the second firing line, and a suspended riser transfer device (60). The method comprising the steps of lowering a riser string in the first firing line, and simultaneously assembling and preparing a riser tensioner system in the second firing line, wherein the riser hang-off assembly displaces the riser string, leaving the top end of the riser string exposed, from the first firing line to the second firing line to be connected to the riser tensioner system.

The present invention relates to a method for riser string handling on an offshore drilling vessel (1), the offshore drilling vessel comprising a multiple firing line hoist system, a riser tensioner system (50) arranged in the second firing line, and a suspended riser transfer device (60). The method comprising the steps of lowering a riser string in the first firing line, and simultaneously assembling and preparing a riser tensioner system in the second firing line, wherein the riser hang-off assembly displaces the riser string, leaving the top end of the riser string exposed, from the first firing line to the second firing line to be connected to the riser tensioner system.

A system dynamically controls position of a mobile offshore drilling unit relative to a subsea operation, an offshore location, or the like. The system has navigation units, acoustic units, and inertial units. The navigation units obtain position from one or more satellite navigation systems, and the acoustic units obtains position from one or more acoustic positioning reference systems. The inertial units obtains position of the unit from one or more inertial navigation systems, and this inertial position for each unit is based at least in part on the positions obtained from respective ones of the navigation and acoustic units. A control unit in operable communication with the inertial units determines dynamic positioning information from the inertial position of at least one of the inertial units. In turn, the control unit then operates equipment on the drilling unit to control its position dynamically.