Abstract: A device for producing a bore in the ground includes a spindle comprising a rotary lead-through and a first sealing face configured to be cylindrical. The spindle is configured so as to be rotatably led through a housing via the rotary lead-through. The housing comprises a second sealing face configured to be concentric with respect to the first sealing face. A rotary seal arrangement is configured to seal the rotary lead-through of the spindle through the housing. The rotary seal arrangement comprises a shaft seal configured to act between the first sealing face of the spindle and the second sealing face of the housing. A labyrinth seal is arranged upstream of the shaft seal when viewed from an outside of the housing.

Abstract: A drawworks for a drilling device for lowering and hoisting a load such as a drill string or parts thereof includes a frame comprising a first bearing point, a second bearing point, and a third bearing point, a winding drum, and a first bearing device connected to the frame for the winding drum. The first bearing device is arranged so that a center of respective bearing forces is located at each of the first bearing point, at the second bearing point, and at the third bearing point.

Abstract: A device for producing a bore in the ground includes a spindle comprising a rotary lead-through and a first sealing face configured to be cylindrical. The spindle is configured so as to be rotatably led through a housing via the rotary lead-through. The housing comprises a second sealing face configured to be concentric with respect to the first sealing face. A rotary seal arrangement is configured to seal the rotary lead-through of the spindle through the housing. The rotary seal arrangement comprises a shaft seal configured to act between the first sealing face of the spindle and the second sealing face of the housing. A labyrinth seal is arranged upstream of the shaft seal when viewed from an outside of the housing.

Abstract: A device for removing sea bed includes a conveying line at least partially surrounded by sea water and an emergency emptying device arranged in the conveying line. The conveying line is configured to have a sea bed be removed therethrough so that a removed sea bed is transportable to a surface in a conveying direction. The emergency emptying device is configured so that the removed sea bed moving in a direction counter to the conveying direction in the conveying line is dischargeable from the conveying line into the sea water.

Abstract: A hoist includes a cable configured to lower and to raise a load, and a drum arranged to be rotatably seated about an axis of rotation and configured to wind up and to unwind the cable. The drum comprises a flanged wheel which comprises a securing device configured to secure the cable. The securing device comprises a cable-accommodating block comprising an abutment surface, and a cable clamp. The cable-accommodating block is affixed to the flanged wheel in a direction of tension of the cable and is configured to have the cable be passed there-through. The cable clamp comprises a counterpart abutment surface. The cable clamp is configured to be affixed to the cable. The abutment surface of the cable-accommodating block is configured to be contacted with the counterpart abutment surface of the cable clamp under an effect of a tensile force.

Abstract: A method for separating a pipe comprising a pipe axis, a pipe wall, a pipe interior, an inside pipe circumference, an upper end to be separated, and a lower end, the pipe being anchored in the ground by the lower end, includes providing a cutting assembly comprising at least one water jet nozzle which produces a water jet. The cutting assembly is lowered into the pipe interior through the upper end to be separated down to a separation zone. The pipe is cut with the cutting assembly. The cutting assembly acts progressively against the inside pipe circumference. The water jet, when activated, produces a cut comprising a substantially constant cut width and two complementary conical cut surfaces. The water jet is directed at an angle (?) to a plane which runs perpendicular to the pipe axis so that the cut runs diagonally through the pipe wall.

Abstract: An apparatus for making a second borehole in the ground, a cross section of which second borehole partially intersects a cross section of an existing first borehole, includes a boring device and a guide device operatively connected to the boring device. The guide device includes at least a first guide element configured to interact with a wall of the existing first borehole and a direction-influencing device configured to influence a direction of the second borehole while the second borehole is being made. The guide device is configured to guide the boring device relative to the existing first borehole.

Abstract: An apparatus for making a second borehole in the ground, a cross section of which second borehole partially intersects a cross section of an existing first borehole, includes a boring device and a guide device operatively connected to the boring device. The guide device includes a first guide element configured to interact with a first side of a wall of the existing first borehole facing the second borehole and a second guide element configured to interact with a second side of the existing first borehole remote from the second borehole. The guide device is configured to guide the boring device relative to the existing first borehole.

Abstract: A pump system configured to deliver drilling fluid in at least one of a driving well and a drilling well includes a pump unit, a rotary drive device configured to drive the pump unit, and a gearbox comprising a driving gear and an driven gear. The rotary drive device is operatively connected to the pump unit by the gearbox.

Abstract: A pumping system for pumping drilling fluid during the driving or sinking of bore holes includes a pump unit, a rotary drive unit configured to drive the pump unit, a gearbox that includes a driving gear and a driven gear, and a pump shaft drive. The rotary drive unit is operatively connected with the pump unit via the gearbox, and the driven gear of the gearbox is nonrotatably connected with the pump shaft drive.

Abstract: An apparatus for making a second borehole in the ground, a cross section of which second borehole partially intersects a cross section of an existing first borehole, includes a boring device and a guide device operatively connected to the boring device. The guide device includes a first guide element configured to interact with a first side of a wall of the existing first borehole facing the second borehole and a second guide element configured to interact with a second side of the existing first borehole remote from the second borehole. The guide device is configured to guide the boring device relative to the existing first borehole.

Abstract: An apparatus for making a second borehole in the ground, a cross section of which second borehole partially intersects a cross section of an existing first borehole, includes a boring device and a guide device operatively connected to the boring device. The guide device includes at least a first guide element configured to interact with a wall of the existing first borehole and a direction-influencing device configured to influence a direction of the second borehole while the second borehole is being made. The guide device is configured to guide the boring device relative to the existing first borehole.