An offshore well-processing system includes a mobile offshore drilling unit and a remote well-processing device configured to be positioned on an offshore platform different from the mobile offshore drilling unit, the mobile offshore drilling unit defining at least one well center and comprising at least one primary drill rig including at least one drill floor and at least one hoisting system for raising and lowering tubular equipment through the at least one well center from/into a well in the seafloor. The mobile offshore drilling unit and the remote well-processing device are configured to be operationally coupled to each other; and the mobile offshore drilling unit is configured to assist in performing concurrent well-processing tasks on respective wells, including the first well processing task performed by the remote well-processing device on a first well and a second well-processing task concurrently performed by the offshore well-processing system on a second well.

The present invention relates to methods and systems for establishing a well foundation as well as for drilling and installation of a surface casing without any use of a drilling rig.

The present invention relates to methods and systems for establishing a well foundation as well as for drilling and installation of a surface casing without any use of a drilling rig.

The invention relates to an underwater drilling device and to a method for procuring drill cores of a bed of a body of water, wherein an underwater drilling device with a base frame is lowered in a body of water and placed on a bed of a body of water. A drill string consisting of at least one tubular drill string element is drilled out into the bed of the body of water in a first drilling step with a drill drive, with a drill core being formed in a receptacle in the tubular drill string element and being received in a core barrel in the drill string element. According to the invention, the drill core is enclosed in pressure-tight manner in a receiving container on the basic cradle under water.

The invention relates to an underwater drilling device and to a method for procuring drill cores of a bed of a body of water, wherein an underwater drilling device with a base frame is lowered in a body of water and placed on a bed of a body of water. A drill string consisting of at least one tubular drill string element is drilled out into the bed of the body of water in a first drilling step with a drill drive, with a drill core being formed in a receptacle in the tubular drill string element and being received in a core barrel in the drill string element. According to the invention, the drill core is enclosed in pressure-tight manner in a receiving container on the basic cradle under water.

An offshore well-processing system includes a mobile offshore drilling unit and a remote well-processing device configured to be positioned on an offshore platform different from the mobile offshore drilling unit, the mobile offshore drilling unit defining at least one well centre and comprising at least one primary drill rig including at least one drill floor and at least one hoisting system for raising and lowering tubular equipment through the at least one well centre from/into a well in the seafloor. The mobile offshore drilling unit and the remote well-processing device are configured to be operationally coupled to each other; and the mobile offshore drilling unit is configured to assist in performing concurrent well-processing tasks on respective wells, including the first well processing task performed by the remote well-processing device on a first well and a second well-processing task concurrently performed by the offshore well-processing system on a second well.

An apparatus for use in marine platform jacking is disclosed herein. In one aspect, a jetting valve includes a valve body with a piston assembly disposed therein. The piston assembly is selectively operated to open and close the valve. A biasing member is coupled to the piston assembly. The piston assembly includes a first piston and a second piston. The dual pistons, in cooperation with the biasing member, allow the valve to self-seal thereby preventing entry of a fluid which is external to the valve.

An apparatus for use in marine platform jacking is disclosed herein. In one aspect, a jetting valve includes a valve body with a piston assembly disposed therein. The piston assembly is selectively operated to open and close the valve. A biasing member is coupled to the piston assembly. The piston assembly includes a first piston and a second piston. The dual pistons, in cooperation with the biasing member, allow the valve to self-seal thereby preventing entry of a fluid which is external to the valve.

A method for deploying a payload at a subaquatic deployment location includes submersing a submersible aquatic vehicle in a body of water. The submersible aquatic vehicle carries a payload. The method also includes driving the submersible aquatic vehicle to a deployment location under the body of water while the submersible aquatic vehicle carries the payload in a first position. The method additionally includes at the deployment location, moving the payload from the first position to a second position. The method further includes deploying the payload from the second position to a deployment position at the deployment location.

A method for deploying a payload at a subaquatic deployment location includes submersing a submersible aquatic vehicle in a body of water. The submersible aquatic vehicle carries a payload. The method also includes driving the submersible aquatic vehicle to a deployment location under the body of water while the submersible aquatic vehicle carries the payload in a first position. The method additionally includes at the deployment location, moving the payload from the first position to a second position. The method further includes deploying the payload from the second position to a deployment position at the deployment location.