20253results about "Artificial islands" patented technology

A wind energy conversion system optimized for offshore application. Each wind turbine includes a semi-submersible hull with ballast weight that is moveable to increase the system's stability. Each wind turbine has an array of rotors distributed on a tower to distribute weight and loads and to improve power production performance where windshear is high. As much of the equipment associated with each rotor as possible is located at the base of the tower to lower the metacentric height. The equipment that may be emplaced at the bottom of the tower could include a power electronic converter, a DC to AC converter, or the entire generator with a mechanical linkage transmitting power from each rotor to the base of the tower. Rather than transmitting electrical power back to shore, it is contemplated to create energy intensive hydrogen-based products at the base of the wind turbine. Alternatively, there could be a central factory ship that utilizes the power produced by a plurality of wind turbines to create a hydrogen-based fuel. The hydrogen based fuel is transported to land and sold into existing markets as a value-added “green” product.

The present invention relates to wind generators installed off-shore, in particular at sea, to support structures forming a part of such wind generators, and to methods of making and installing such wind generators. The technical field of the invention is that of making, transporting, and installing wind generators for producing electricity, more particularly off-shore, and in large numbers, so as to form wind "farms". The wind generator of the invention comprises a wind turbine and a deployable telescopic pylon or support supporting the turbine, and a gravity base supporting the pylon or support.

A floating wind turbine platform includes a floatation frame (105) that includes three columns (102, 103) that are coupled to each other with horizontal main beams (115). A wind turbine tower (111) is mounted above a tower support column (102) to simplify the system construction and improve the structural strength. The turbine blades (101) are coupled to a nacelle (125) that rotates on top of the tower (111). The turbine's gearbox generator and other electrical gear can be mounted either traditionally in the nacelle, or lower in the tower (111) or in the top of the tower-supporting column (102). The floatation frame (105) includes a water ballasting system that pumps water between the columns (102, 103) to keep the tower (111) in a 10 vertical alignment regardless of the wind speed. Water-entrapment plates (107) are mounted to the bottoms of the columns (102, 103) to minimize the rotational movement of the floatation frame (105) due to waves.

Single and multiple retaining wall blocks and block systems are disclosed. The blocks are provided with a face connection system which includes at least one front lip extending from a top surface of the block and a bottom channel formed into a front face and bottom surface of the block. The front lips have a length which is less than the width of the blocks.

PCT No. PCT/IE97/00002 Sec. 371 Date Jul. 10, 1998 Sec. 102(e) Date Jul. 10, 1998 PCT Filed Jan. 10, 1997 PCT Pub. No. WO97/25483 PCT Pub. Date Jul. 17, 1997An ice composite body has an inner ice core covered by a protective outer armor layer. Thermal insulation is provided between the inner core and the outer armor layer. Refrigeration is accomplished by a system of conduits for refrigerant are located within the body. The insulation and the refrigeration are adapted to maintain the ice core in a frozen condition relative to the ambient temperature. The base of the body cavity can be in direct contact with the water bed such that the ice core is freeze bonded to an advancing ice front in the water bed. The ice composite body provides structures of equal or greater strength than equivalent structures using conventional materials.

Measurements made by a rotating sensor on a bottomhole assembly are used to determine the toolface angle of the BHA. The method includes using a phase locked loop (PLL) to determine a phase difference between the sensor output and a reference signal.

An embodiment of an apparatus useful for up-righting a wind turbine pillar at an offshore installation location includes a barge having first and second towers and an open area therebetween and which extends downwardly to the offshore installation location. At least two pulling lines extend from the towers to the pillar and are useful to assist in moving the pillar into a generally up-right orientation between the towers and lowering the pillar downwardly through the open area to the offshore installation location.

Building materials of modules of at least one mortise and tenon and either a curvilinear side face or joinder of the modules at angles other than zero and ninety degrees. Lateral ends of the modules are flush with lateral ends of adjacent modules. Preferably, the modules are: (1) of a low density aggregate cementitious mix; and/or (2) have a hollow space extending from the mortise to the tenon and include a structural support member passing through the hollow space and a compression retainer securing the structural support member to the modules; and/or (3) have grooves circumscribing the modules and which are proximate corresponding grooves on modules placed on top or below. The modules are preferably sealed to one another with sealant placed in the grooves.

A deepwater windpower plant (DWP) has a tension leg-type floating platform with an evacuable base for adjusting its buoyancy for installation at ocean depths ranging from 40 meters up to 1.5 kilometers and more. The DWP has a typical offshore wind turbine assembled close to shore which is then towed to a desired installation site on the ocean, and held in place by a gravity anchoring base (GAB), to which an evacuable portion or space of the DWP platform is anchored. The GAB has upwardly extending mooring tethers and a power cable which are brought to the ocean surface by attached buoys. The GAB is sunk to the ocean floor at the installation site under controlled conditions so that the GAB lands flat on the ocean floor. As the GAB sinks to the ocean floor, the mooring tethers and power cable are pulled to the surface by their respective buoys. The GAB is loaded with heavy ballast material that can be dropped from barges on the ocean surface into the upwardly open GAB below the barges.

A retaining wall block (1) has parallel top and bottom faces (2, 3), a front face (4), a rear face (5), first and second side wall faces (6, 7) and a vertical plane of symmetry (S) extending between the front and rear faces (4, 5). The block (1) is formed as a body portion (8) including the front face (4), a head portion (9) including the rear face (5) and a neck portion (10) connecting the body portion (8) and the head portion (9). The body, head and neck portions (8, 9, 10) each extend between the top and bottom faces (2, 3) and between the first and second side wall faces (6, 7). An opening (13)′ extends through the neck portion (10) from the top face (2) to the bottom face (3), dividing the neck portion (10) into first and second neck wall members (14, 15) extending rearwardly from the body portion (8) to the head portion (9). First and second pin holes (16 and 17) are each disposed in the body portion (8) and open onto the top face (2) for receiving a pin (50, 51) with a free end of the pin protruding beyond the top face. First and second pin receiving cavities (18, 19) are each disposed in the body portion (8) and open onto the bottom face (3) for receiving the free end of a pin (50, 51) received in a pin hole (16 and 17) of an adjacent block (1) disposed therebeneath so as to interlock the blocks (1) with a predetermined setback. The neck wall members (14, 15), pin holes (16 and 17) and pin receiving cavities (18, 19) are positioned such that a first plane (P1) extending parallel to the plane of symmetry (5) passes through the first pin receiving cavity (18), first pin hole (16) and first neck wall member (14) and a second plane (P2) extending parallel to the plane of symmetry (5) passes through the second pin receiving cavity (19), second pin hole (17) and second neck wall member (15).

A semi-transmissive reflective liquid crystal device includes a first substrate, a second substrate disposed opposite to the first substrate, a liquid crystal layer disposed between the first substrate and the second substrate, a plurality of sub-pixel regions at which reflective display and transmissive display are performed, each of the sub-pixel regions being the smallest display unit, a first electrode and a second electrode disposed in each of the sub-pixel regions at the liquid crystal layer side of the first substrate for driving the liquid crystal layer by an electric field generated between the first electrode and the second electrode, and a reflective polarization layer disposed at the first substrate or the second substrate, the reflective polarization layer including a transmission axis and a reflection axis perpendicular to the transmission axis, for reflecting a portion of an incident light, which is a polarized light component parallel with the reflection axis, and transmitting the remainder of the incident light, which is a polarized light component parallel with the transmission axis.

A retaining wall block system having multiple sizes and shapes of blocks with differently dimensioned, interchangeable front and back faces. The blocks are used to construct an irregularly textured wall having a weathered, natural appearance. Multiple channels in the lower face of the block are used to engage pins in pin-receiving apertures to form an attachment system. Horizontal reinforcing members are also used in the channels and vertical reinforcing members are used in cores of adjacent blocks for reinforcing a wall. Reinforcing geosynthetic materials can also be firmly held in a wall by means of the pins or by connectors adapted to fit in the block channels.

An erectable arm assembly for use in a borehole, the erectable arm assembly comprising a main body and an arm member, the arm member being able to move between a collapsed position in which the assembly can be removed from the borehole and an erected position, the erectable arm assembly being adapted to house a fluid drilling assembly comprising a fluid cutting device and a flexible hose drill string such that the arm member during erection can contain at least part of the fluid drilling assembly, and when in the erected position the arm member is able to guide the fluid cutting device towards the borehole wall, the assembly further including at least one sensor for monitoring the arm member or the fluid drilling assembly.

A method for determining wellbore trajectory includes determining survey parameters in the wellbore; measuring force parameter(s) in the wellbore; and correcting the survey parameters using the measured force parameter(s). The downhole measured force parameters may include forces associated with an operation of a steering device such as an internal reaction force, and/or a bending moment. In variants, the method may include measuring a wellbore temperature; measuring a wellbore parameter in addition to the temperature; and correcting a survey parameter using the measured parameter and the measured temperature. These methods may include correcting survey parameters using measured wellbore diameters. Also, a processor in the wellbore may be programmed to perform the correction while in the wellbore and/or control a steering device using measurements provided by a sensor for measuring internal reaction forces.