Abstract: A grinding arrangement is described to remove sharp edges on a pipe coupling (51) of a drill string (50), as a consequence of marks from the jaws of pliers and machines used to connect the pipe couplings (51) on a drill deck. A receiving unit (30) is arranged to receive a grinding unit (36) which is equipped with at least one grinding element (38), as the grinding unit (36) is arranged to be driven into the receiving unit (30) with the help of the drill string (50) or a suitable running tool and to be locked securely into the receiving unit (30). Furthermore, the receiving unit is arranged in a riser, landing string or in other connections between the drill deck and a wellhead and over a sealing arrangement for dynamic sealing around the drill string (50) during pressure controlled drilling.

Abstract: A sealing arrangement and method for dynamic sealing around a drill stem (50) in water-carrying, drilling fluid-carrying or hydrocarbon-carrying wells, comprising at least one dynamic sealing (35a) which is arranged to envelop the drill stem (50), and a receiver unit (30) arranged to receive the at least one sealing (35a), with the dynamic sealing being arranged to be driven into the receiver unit (30) with the help of the drill stem, and to be securely locked in the receiver unit, and also that internal pressure support in the sealing arrangement is provided corresponding to at least the surrounding pressure.

Abstract: A grinding arrangement is described to remove sharp edges on a pipe coupling (51) of a drill string (50), as a consequence of marks from the jaws of pliers and machines used to connect the pipe couplings (51) on a drill deck. A receiving unit (30) is arranged to receive a grinding unit (36) which is equipped with at least one grinding element (38), as the grinding unit (36) is arranged to be driven into the receiving unit (30) with the help of the drill string (50) or a suitable running tool and to be locked securely into the receiving unit (30). Furthermore, the receiving unit is arranged in a riser, landing string or in other connections between the drill deck and a wellhead and over a sealing arrangement for dynamic sealing around the drill string (50) during pressure controlled drilling.

Abstract: A device is described for maintaining a predominately constant pressure on, and flow of drilling fluid in, a drill string (100) where drilling fluid is supplied via a circulation system for drilling fluid. The device comprises a mainly elongated, internally hollow body (10) arranged to surround the drill string where the hollow body (10) comprises at least an upper pressure chamber (40a) and a lower pressure chamber (40b) connected with respective inlet and/or outlet (50a, 50b) for drilling fluid from or to the drilling fluid circulation system, as said pressure chambers (40a, 40b) are able to be closed and separated by an intermediate valve (70) arranged for circulation of drilling fluid into or out of the drill string (100) during coupling up or disconnecting of a new length of drill string (100). A method to maintain the mainly constant pressure of drilling fluid in a drill string is also described.

Abstract: A sealing arrangement and method for dynamic sealing around a drill stem (50) in water-carrying, drilling fluid-carrying or hydrocarbon-carrying wells, comprising at least one dynamic sealing (35a) which is arranged to envelop the drill stem (50), and a receiver unit (30) arranged to receive the at least one sealing (35a), with the dynamic sealing being arranged to be driven into the receiver unit (30) with the help of the drill stem, and to be securely locked in the receiver unit, and also that internal pressure support in the sealing arrangement is provided corresponding to at least the surrounding pressure.

Abstract: Sealing arrangement for dynamic sealing around a drill stem (16) or a coiled tubing is described, comprising an elongated, dynamic sealing unit (10) which is arranged to surround the drill stem (16), in that the sealing unit (10) comprises a number of sets with main seals (20) arranged mutually spaced apart in the longitudinal direction of the sealing unit (10), where said main seals (20) comprise at least one disc-formed or ring-formed packer element (30) of an elastic material, such as an elastomeric material, arranged to surround said drill stem (16). Said main seal (20) comprises at least one inlet channel arranged to receive a friction reducing medium through or via the seal directly into the seal surface (32) of the packer element (30), against the drill stem (16).

Abstract: A device is described for maintaining a predominately constant pressure on, and flow of drilling fluid in, a drill string (100) where drilling fluid is supplied via a circulation system for drilling fluid. The device comprises a mainly elongated, internally hollow body (10) arranged to surround the drill string where the hollow body (10) comprises at least an upper pressure chamber (40a) and a lower pressure chamber (40b) connected with respective inlet and/or outlet (50a, 50b) for drilling fluid from or to the drilling fluid circulation system, as said pressure chambers (40a, 40b) are able to be closed and separated by an intermediate valve (70) arranged for circulation of drilling fluid into or out of the drill string (100) during coupling up or disconnecting of a new length of drill string (100). A method to maintain the mainly constant pressure of drilling fluid in a drill string is also described.

Abstract: Sealing arrangement for dynamic sealing around a drill stem (16) or a coiled tubing is described, comprising an elongated, dynamic sealing unit (10) which is arranged to surround the drill stem (16), in that the sealing unit (10) comprises a number of sets with main seals (20) arranged mutually spaced apart in the longitudinal direction of the sealing unit (10), where said main seals (20) comprise at least one disc-formed or ring-formed packer element (30) of an elastic material, such as an elastomeric material, arranged to surround said drill stem (16). Said main seal (20) comprises at least one inlet channel arranged to receive a friction reducing medium through or via the seal directly into the seal surface (32) of the packer element (30), against the drill stem (16).

Abstract: An end piece arrangement is mounted on an end of a pipe sleeve to close off the annular passage between the pipe sleeve and drill stem and to divert an upward flow of sludge, cuttings and gas into a conduit system to transport the flow to a remote location. In one embodiemnt, the arrangement is a self-contained unit that houses seal rings to seal against the drill stem. In another embodiment, the arrangement includes separate components; i.e. a housing mounted on the pipe sleeve to divert the upward flow and a seal unit mounted on the drill stem and rotatably mounted in the housing.

Abstract: A method and a system are described for processing of drilling fluid from a drilling hole (10) in an underwater well to a floating drilling rig or drilling vessel, comprising a sealing device (12) connected to a well head, a pump module (14) to transport drilling fluid, a treatment plant for treatment of drilling fluid, or a storage installation. Before a blow-out valve is connected to the well head and before a riser is connected between the drilling hole and the floating drilling rig or drilling vessel, the pump module (14) placed on the ocean bed transports drilling fluid from the drilling hold (10) on the ocean bed to the floating drilling rig or drilling vessel.

Abstract: A system for cleaning of vertical risers at floating drilling rigs, which comprises the following main components: a high-pressure pump (16); an umbilical hose (26) comprised of a hydraulic tubing and an electric cable, a cable winch unit (18) and an internal flushing device (20). The flushing device comprises a number of spring loaded centring wheels (32) around the body (31), one or more rotary high-pressure jets (34) in the body (31), collecting means (38) for larger particles at the lower section of the body (31) and a camera (40) fitted to the underside of the tool (30).

Abstract: An end piece arrangement is mounted on an end of a pipe sleeve to close off the annular passage between the pipe sleeve and drill stem and to divert an upward flow of sludge, cuttings and gas into a conduit system to transport the flow to a remote location. In one embodiemnt, the arrangement is a self-contained unit that houses seal rings to seal against the drill stem. In another embodiment, the arrangement includes separate components; i.e. a housing mounted on the pipe sleeve to divert the upward flow and a seal unit mounted on the drill stem and rotatably mounted in the housing.