Abstract: A slip device includes a housing forming an axial bore, an upper set of slips spaced axially above a lower set of slips, and a rack and pinion actuator radially moving the upper set of slips and the lower set of slips between a retracted position and an extended position to grip a tubular disposed in the bore. The upper set of slips and the lower set of slips can be oriented to resist downward movement of the gripped tubular and to permit upward movement of the gripped tubular. One of the upper set of slips and the lower set of slips can be oriented to resist upward movement of the gripped tubular and the other of the upper set of slips and the lower set of slips can be oriented to resist downward movement of the gripped tubular.

Abstract: This invention relates to a method for replacing pipes, and an apparatus therefor. The method utilizes a cable which is passed along an existing pipe. The cable is connected to a component at the end of the pipe, the component also being connected to a length of replacement pipe. The cable is pulled whereby the existing pipe is removed and the replacement pipe inserted in its place. The invention is expected to achieve its greatest utility as a method and apparatus for replacing pipes carrying water or gas to domestic and commercial properties.

Abstract: The present invention relates to a marine pipeline installation system for laying an offshore pipeline and/or installing a subsea riser, said system being adapted to carry out the reel lay method and the J-lay method. The system comprises a vessel with a moonpool, a pipeline launch tower arranged on the vessel, a pipeline guide at an elevated position on said tower for guiding said pipeline to a pipeline launch trajectory along said tower, and one or more tensioners. The support assembly of at least one tensioner frame is adapted to allow for displacement of the tensioner frame between an active position, wherein the pipeline launch trajectory extends through the tensioner frame between the tracks, so that the tracks can engage on a pipeline, and a retracted and non-operable position. The system further comprises a J-Lay installation.

Abstract: A system and method is provided for communicating with a device disposed in a wellbore. Signals are sent through the Earth via signal pulses. The pulses are created by a seismic vibrator and processed by a receiver disposed in the wellbore. The receiver is in communication with the device and transfers data, such as command and control signal, to the device.

Abstract: A pier bracket comprises a metal bar having a plurality of bolt holes formed through a top half of the metal bar and a plurality of opposingly faced barbs extending from planar side surfaces in a lower half of the metal bar. The barbs are configured to provide asymmetrical resistance force to movement of the pier bracket when received within an aperture formed in a concrete pier or footing.

Abstract: Designs and methods for a modular foundation provide a strong and secure foundation in a time efficient and cost efficient manner. The modular foundation can include a cap structure having one or more pile guides coupled together. The modular foundation can further include piles that extend through the pile guides and into the ground. The cap structure and pile guides can be configured to use both vertical and angled piles. A plurality of connectors can connect the cap structure to the piles. The resulting foundation can be used to support various superstructures.

Abstract: A shield cap for a shield-type support for underground mining includes a cap plate, with reception devices for the connection of hydraulic cylinder heads to the shield cap, and a supporting structure welded below the cap plate and having a plurality of longitudinal spars. At least two of the longitudinal spars include substantially I-profile struts having an upper profile chord, a lower profile chord and a middle chord running perpendicularly to the two profile chords. The distance between the upper and the lower profile chord decreases at least over a part length of each strut.

Abstract: A pipe comprising a flexible membrane that is disposed over a plurality of spaced-apart tendons is disclosed.

Abstract: A directional fracture grouting method with polymer for seepage control of dikes and dams includes the steps of: arranging a plurality of directional fracture grouting holes at a predetermined distance along the axis of the dike or dam; forming the directional fracture grouting holes by pushing a special drilling tool; placing a hole-sealing grouting pipe and a fracture grouting pipe into each of the directional fracture holes; and injecting including the steps of firstly injecting a small amount of polymer material into the sealing-hole pipe, and secondly injecting predetermined amount of material into the fracture grouting pipe. Under the chemical reaction, the mixed material expands, fractures the soil along the guided directions, and forms a super thin polymer segment. Finally, the polymer segments are overlapped each other, and the seepage control system is constructed inside the dike or dam.

Abstract: The pipe access device is comprised of a curved plate adapted to engage an underground pipe along an arc of the outer surface of the pipe, and a boss extending upwardly from the curved plate about an aperture in the curved plate. The curved plate extends along an arc of the outer surface of the curved plate that corresponds to a central angle of the pipe less than or equal to 180°. The curved plate includes a concave surface with a radius of curvature less than a radius of curvature of the outer surface of the pipe so as to bias the curved plate against the outer surface of the pipe when the curved plate is flexed to engage the pipe. The pipe access device is for use in providing access to the buried pipe that requires minimal excavation and disruption of the soil.

Abstract: A marine vessel is provided. The marine vessel comprises a cable handling system disposed on the marine vessel between a leading end and a trailing end of the vessel. The cable handling system comprises a cable handler positioned proximate the trailing end and a cable storage device positioned forward of the cable handler, the cable storage device and the cable handler adapted to receive a flexible cable and define a portion of a cable path therebetween. The marine vessel also comprises a seismic device storage structure extending between the leading end and the trailing end and disposed substantially parallel to the cable path, a ramp coupled to a portion of the trailing end of the vessel aft of the cable handler, and a staging section disposed between the seismic device storage structure and the ramp to provide transfer of seismic devices between the seismic device storage structure and the ramp.

Abstract: The invention relates to a fiber-reinforced plastic drilling anchor comprising an axial bore that runs along the entire length thereof, fibers which extend in the longitudinal direction thereof, and fibers that extend at an angle to the longitudinal direction thereof. A first layer of fibers that extend at an angle to the longitudinal direction of the drilling anchor is surrounded by a second layer of fibers extending in the longitudinal direction of the drilling anchor, and the second layer of fibers is surrounded by a third layer of fibers extending at an angle to the longitudinal direction of the drilling anchor. The inventive drilling anchor further comprises a thread which extends along the entire length thereof and is molded into at least one outer fiber layer of the drilling anchor. The invention also relates to a method for producing such a drilling anchor.

Abstract: A data logging apparatus is provided with a separate power supply for driving external sensors, a main module including an acceleration sensor, a memory unit, a control unit embedded with a clock unit for operating a measurement value of the acceleration sensor and storing the operated measurement value into the memory unit in a time series, and a first battery for supplying power to the acceleration sensor, the memory unit, and the control unit; a second battery detachably installed at one side main unit; and a sensor mounting module installed with a plurality of sensor resting units so that sensors can be attached and detached, for receiving the second battery inside so that power of the second battery can be supplied to the sensors installed in the sensor resting units, and transferring measurement signals of the sensors to the control unit.

Abstract: A buoyancy adjustment device utilizes an inflation valve connected between the diver's breathing gas supply and a compartment to admit gas into the compartment to increase the diver's buoyancy. An exhaust valve connects between the compartment and the outside of the vest, to release gas from the compartment to the surrounding environment to decrease the diver's buoyancy. A hand-operated controller connected to the inflation valve, when caused to move from a neutral position to an inflation position, actuates the inflation valve and admits gas to the compartment. The hand-operated controller is also connected to the exhaust valve via a flexible pushrod so that, when caused to move from the neutral position to an exhaust position, actuates the exhaust valve and releases gas from the compartment. The flexible push rod is housed in a sleeve that is totally contained within the compartment.

Abstract: A set of components that can be used to construct a structurally sound dock are disclosed. The components can be extruded and the components are shaped such that interconnected components provide support for the other components thereby alleviating weak points due to welded only joints. A fascia channel provides additional strength by including structures that improve the vertical and horizontal strength of the fascia channel. HDPE plastic inserts and sheaves provide sound dampening for metal to metal contact points. Other components include a corner connector, a post system and a hinge system.

Abstract: An electrical power generating system is connected to a sewer for conveying waste water to a sanitary treatment station. Waste water is propelled through the sewer line by pumping equipment which simultaneously pulverizes most large objects carried by the waste water. The waste water drives one or more water-operated turbines. The turbines are operatively connected to electrical power generators for producing electrical power and dispersing the power through an electrical power transmission system.

Abstract: A riser installation method including the steps of providing a first vessel situated over a hydrocarbon well, supporting a hydrocarbon transfer duct from the first vessel by a first end that is attached to a lowering device on the first vessel, and attaching a second end of the hydrocarbon duct to a second vessel, at a position near the first vessel. The method also includes the steps of lowering the transfer duct, increasing the distance of the second vessel from the first vessel, pulling the transfer duct until the second vessel is near the third vessel, contacting a section of the transfer duct with the sea bed, displacing the second end of the transfer duct from the first vessel, returning the second end of the transfer duct to the mooring position, and bringing the second end of the hydrocarbon transfer duct in fluid communication with the third vessel.

Abstract: A small vessel dock racking system provides a three-sided cradle that is rotatably connected to two lateral supports extending outward from one side of the dock. A person in the water can float the canoe or kayak into the cradle and lift it into a secure vertical storage position on the side of the dock without having to get up on the dock. A pivot point extending out into the water has the advantages of both accommodating freeboard and minimizing the distance between the pivot and the boat's center of gravity, thereby allowing for much less effort in lifting. Depending on the depth of the vessel, the cradle can be dimensioned so that the position of the vessel's center of gravity tends to hold the cradle in a vertical alignment after it's been lifted. Where needed, a cradle latch that can be activated from the water side further secures the storage position.

Abstract: A system for handling a roll of mesh for application to one or more faces of an underground mine passage includes a dispenser for supporting the roll of mesh for application to at least one face of the mine passage, as well as at least one arm for supporting the mesh adjacent to the face upon being dispensed from the dispenser. The arm is capable of flexing in providing this support to provide tension to the mesh during the application from the roll to the at least one face of the mine passage. The dispenser may include a cradle for dispensing the mesh from the roll. The cradle may include a base for supporting the roll of mesh and at least one laterally extendable support for supporting a first lateral side of the roll of mesh. Related methods are also disclosed.

Abstract: A jack-up platform (1) has a hull (2) and at least three longitudinally movable support legs (3) for the hull (1), at least one of the support legs (3) has at least one variable speed drive (8, 8A1 to 8F2) as a part of a leg driving mechanism, wherein the platform (1) has a closed-loop control unit (7) for the driving mechanism, the closed-loop control unit (7) being connected with the variable speed drive (8, 8A1 to 8F2) via a bi-directional electronic bus (16) for transmitting control parameters (M*,M,N,R).