Anchoring Arrangement Patents (Class 114/293)
  • Patent number: 5339760
    Abstract: A vessel with a downward-facing mooring part moors to a submerged buoyant mooring element anchored to the ocean bottom by hoisting the mooring element from a stowed position, at a depth of net neutral buoyancy of the mooring element and its anchoring system, until a mating upper part of the mooring element comes into contact with the mooring part. The mooring operation is completed safely, quickly, and positively by securing the mooring element to the vessel with a multiplicity of hooks that are lowered by actuators mounted in the vessel to engage a mooring ring on the upper part of the mooring element and are then raised to exert a predetermined compression force on a resilient compression member.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: August 23, 1994
    Inventor: Jens Korsgaard
  • Patent number: 5316509
    Abstract: An improved detachable mooring system is disclosed of the kind including a rotatable turret mounted on the vessel and a buoyant spider buoy, secured by mooring legs to the sea floor, which may be selectively connected by means of a hydraulic connector to the bottom of the turret. One improvement relates to apparatus for establishing pre-load tension between a collet flange hub of the spider buoy and a hydraulic powered connector at the bottom of the turret. Another improvement relates to apparatus for remotely sensing the level of pre-load tension in the connector. Another improvement relates to a self-aligning support arrangement for supporting the collet connector to the bottom of the turret. Another improvement relates to an axial load bearing arrangement for supporting the turret with respect to the vessel.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: May 31, 1994
    Assignee: Sofec, Inc.
    Inventors: L. Terry Boatman, Charles O. Ethridge, Kristen I. Pedersen, Peter F. Poranski, Sr.
  • Patent number: 5275379
    Abstract: A wildcat chain hoist for lifting anchor chain where the chain length may have different size chain links. The wildcat chain hoist continuously lifts the chain regardless of the different link sizes by engaging alternate chain links defined as horizontal links and applying a pulling force to them. The wildcat chain hoist includes a drum constructed of two identical halves having whelps for guiding the vertical links. The halves are joined together to provide a v-shaped cross section. There are pockets extending from the drum hub up to the perimeter with the pockets increasing in size toward the perimeter to gage and guide the chain links into the proper pocket size. Each wildcat chain drum half has a flange rim which moves or adjusts to close the pockets on the chain links to pull on the chain, and to open to release the chain.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: January 4, 1994
    Inventor: Roger W. McAleer
  • Patent number: 5265553
    Abstract: A small boat mooring system is provided for securing a boat to a dock, pier or pilings in such a way that the boat is free to move vertically with the normal changes in tide or wave action. The system comprises a plurality of nylon lines, a snaphook for connecting each line to the boat, a counterweight connected to the other end of each line, and hardware mounted on each of a plurality of pilings. The hardware comprises a steel plate section, a lag eye, a quick link, and a pulley connected thereto for conveying the nylon line through the hardware. The system of the present invention permits vertical movement of the boat, such as that caused by rise and fall of tides or rolling of the boat, while maintaining the boat centered in the slip and away from an associated dock, pier or piling. The system further redistributes or absorbs energy produced by the action of water, wind and other conditions on the boat.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: November 30, 1993
    Assignee: Sea-Safe, Inc.
    Inventor: Hugh B. Brydges
  • Patent number: 5257592
    Abstract: An anchor shock absorber for use with a marine vessel anchoring system. The anchor shock absorber is purposed to relieve the strain on a rope or a cable which joins an anchoring device to the marine vessel. The anchor shock absorber includes an casing, a spring assembly interposed within the casing, and a buoyant material associated with the casing. The casing may be of a rigidly constructed independent of the buoyant material or may be formed by the buoyant material. The spring assembly includes axially disposed opposing first and second couplings. A spring is arranged between the first and second couplings in such a manner that an axial strain induced upon the anchoring system causes the first and second couplings to move in opposing directions, thus distorting the spring axially. This distortion of the spring absorbs the shock or relieves the strain sustained by the connecting line. An absence of strain allows the spring to relax, or to return a normal state or condition.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: November 2, 1993
    Inventor: Rick D. Schaefer
  • Patent number: 5222453
    Abstract: An apparatus and method reducing the motions of a marine structure anchored in a body of water over a hydrocarbon drilling or production site using a spread type mooring system. The structure's motions are reduced by increasing the amplitude and altering the dynamic tension variation of the mooring system, without affecting the static response of the mooring system under static loads.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: June 29, 1993
    Assignee: Odeco, Inc.
    Inventor: Luc G. Chabot
  • Patent number: 5203860
    Abstract: A pneumatic mattress is arranged to include a recess within a pneumatic chamber of a plurality of pneumatic chambers to permit positioning of an anchor to provide for storage and transport of the anchor during periods of non-use. The anchor is arranged with annular upper and lower anchor ribs to enhance engagement for securement and tethering of the mattress.
    Type: Grant
    Filed: April 7, 1992
    Date of Patent: April 20, 1993
    Inventor: Patrick J. Bollant
  • Patent number: 5178087
    Abstract: Mooring device comprising a vessel with a turntable or the like to which anchor lines are connected extending in different directions and which is rotatable about a vertical axis, which anchor lines, preferably at or adjacent to the point of connection with the vessel, are provided with a hydraulic device which upon overload of one or more of the anchor lines allows extension so that in extremely heavy weather conditions the loads on mooring lines and vessel can be kept under control.
    Type: Grant
    Filed: January 16, 1991
    Date of Patent: January 12, 1993
    Assignee: Single Buoy Moorings, Inc.
    Inventors: Geoffery O'nion, Jean C. Gramet
  • Patent number: 5170737
    Abstract: Mooring device comprising a vessel and a body carrying anchor lines which body is rotatable about a substantially vertical axis or weathervaning axis with respect to the vessel and attached to the vessel in a manner such that in case a predetermined load in one or more of the anchor lines is exceeded said body swings away with respect to the vessel in the direction of the load to avoid overloading of anchor lines and mooring device by changing the load excursion characteristic in such a way that at said predetermined load excursion can take place without the substantial change of the load.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: December 15, 1992
    Assignee: Single Buoy Moorings, Inc.
    Inventor: Leendert Poldervaart
  • Patent number: 5168823
    Abstract: A transportable remote-controlled mooring apparatus and method for water craft is disclosed. The mooring of the present invention employs a relatively large hoop of flexible material through which a water craft activation line travels. The mooring attaches to an anchor or similar secure point off-shore and allows the water craft to be unloaded at shore and then pulled to and retrieved from a safe mooring off-shore. The mooring unit is of minimal size and weight, highly reliable, and not susceptible to fouling problems from waterborne debris.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: December 8, 1992
    Inventor: Edgar M. Sheppard, Jr.
  • Patent number: 5159891
    Abstract: A backdown buoy-type mooring is provided which will pull supply vessels away from a tension leg platform while the supply vessel is being unloaded. The boat mooring system will consist of surface buoys attached to the top pad-eye of the lateral mooring intermediate buoys. The boat mooring system of the invention is configured for centering over a spaced array of ocean floor wells, being moved over to the farthest well, and adapted to be moved over to the nearest well.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: November 3, 1992
    Assignee: Shell Offshore Inc.
    Inventors: Curtis J. Lohr, David A. Huete
  • Patent number: 5144904
    Abstract: Stabilizing apparatus for stabilizing boats comprising a weighted concave body which is suspended from the boat and which is formed as a grid defining openings through the body and a flexible flap in the concavity of the body, the flap blocking the openings when the body rises in the water due to rolling of the boat so as to inhibit rolling and the flap moving away from the openings to permit the apparatus to rapidly fall as the boat rolls in the opposite direction. A pair of bodies are provided on opposite sides of the boat to inhibit rolling in both directions.
    Type: Grant
    Filed: February 28, 1991
    Date of Patent: September 8, 1992
    Assignee: Ocean Torque Patent Pty. Ltd.
    Inventor: Jeffrey W. Weldon
  • Patent number: 5107784
    Abstract: The docking system (10) includes a plurality of docking members (16, 17, 18) connected together end to end. Each docking member (16, 17, 18) is anchored to the bottom surface (47) of the body of water by means of a combination of fixed anchor members (42, 44), connecting cables (46, 52) and a suspended anchor member (50) which is suspended in the water between the respective docking members (16, 17, 18) and the bottom surface (47). At the water end of the plurality of docking members (16, 17, 18) is positioned crosswise a breakwater member (19) which is substantially longer than the width of the docking members (16, 17, 18). The breakwater member (19) has an anchor system comprising a fixed anchor member (64), an anchor cable (68) and a suspended anchor member (70).
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: April 28, 1992
    Inventor: Franklin R. Lacy
  • Patent number: 5097787
    Abstract: There is provided a tensioning device for pretensioning mooring lines in accordance with the tension-in-a-bight principle. The tensioning device is located at the bight of the mooring lines and includes a link catching device comprising inclined land surfaces and a catching tooth at the lower end of the land surfaces, which catching device catches a link, the caught link, of link chain during heaving up on a riser chain section so enabling the pretensioning to be achieved in the mooring line. Slots are provided in the tensioning device adjacent the land surfaces such that the downline link threading the caught link and the following downline link each have a significant degree of pivotal freedom to preclude bending moment loading in these links during heaving up on the riser line during tensioning.
    Type: Grant
    Filed: May 23, 1990
    Date of Patent: March 24, 1992
    Assignee: Brupat Limited
    Inventor: Peter Bruce
  • Patent number: 5097788
    Abstract: A method and device for fishing up an immersed body from a position spaced from and disposed above the immersed body. A fishing member is moored to the body, with the member including a support integral with the body and a releasable portion. The support and the releasable portion are initially assembled together. The releasable portion is released, leading to the separation of the releasable portion and the support. Upon the releasable portion reaching the position, at the level of the position lift connecting members are moored to the fishing member, with the lift connecting members being attached to the body and to the releasable portion. This fishing member is actuated so as to place the body in a vicinity of the fishing member.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: March 24, 1992
    Assignee: Institut Francais du Petrole
    Inventor: Yvon Castel
  • Patent number: 5062375
    Abstract: A mechanism for controlling the extension of a boat anchor line from a boat, to thus anchor a boat in waters of different depths, or to let the boat drift downstream different distances from the submerged anchor. The mechanism includes a line-guidance pulley and a line-gripper device having a spring means for biasing the device to a condition wherein the line is held motionless against travel into or out of the boat. A c-clamp is used to detachably mount the mechanism on the side wall of a small boat.
    Type: Grant
    Filed: April 5, 1991
    Date of Patent: November 5, 1991
    Inventor: James A. Makielski
  • Patent number: 5062376
    Abstract: An anchoring device for mounting on a boat, particularly a light boat used for sporting purposes. It has a pair of aligned winch drums with cables wound on them into rolls for winding and unwinding in opposite directions; the drums being mounted on a frame for rotation about parallel axes. A manually operable drive is mounted on the frame and on the drums, which drive allows them to be rotated and, in a neutral position, allows them to idle. A manually releasable stop member mounted on the frame cooperates with the drive to stop rotation of the drums so as to prevent the cable from unwinding.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: November 5, 1991
    Assignee: Gestion A. et Y. Gilbert Inc.
    Inventor: Michel Tremblay, deceased
  • Patent number: 5061131
    Abstract: A marine structure situated in a seabed having mooring means designed to provide resistance to the environmental forces acting on the structure. Weights are attached to the mooring means at a distance above the seabed so that the weights do not touch the seabed during normal operating conditions. When extreme environmental loads move the structure a certain distance leeward of its original locations, the weights on leeward mooring means contact the seabed, significantly and immediately increasing the restoring force provided by the mooring means.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: October 29, 1991
    Assignee: Odeco, Inc.
    Inventors: Terry D. Petty, Luc G. Chabot
  • Patent number: 5054415
    Abstract: A mooring/support system for anchoring marine structure comprises a plurality of anchor elements equiangularly spaced and connected to the sea bed at one end by means of anchors. The other ends of the anchor elements are connected to a common bridle element. Eight anchor elements may be used giving the system a octagonal configuration. Each anchor element comprises a buoyant portion and a non-buoyant portion, the buoyant portion being such that a mooring point positioned below the surface of the water to provide an essentially horizontal restraint to the moored or supported object and to allow ships to pass over the system without contact therewith. The system is such that it can be pre-installed before arrival of the marine structure. The buoyancy of the chambers may be varied so as to regulate the preload of the system.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: October 8, 1991
    Assignee: Marshall Industries Limited
    Inventor: John J. Marshall
  • Patent number: 5044297
    Abstract: A deep water mooring system including a connector element which is nonbuoyant, has connections to a submerged pipeline and which is supported by flotation tanks that are anchored to the bottom, and a device for retrieving the connector element from the water and to connect to a suitable floating surface storage system for flow between the storage system and the submerged pipeline. The retrieval line with a buoy holding its upper end at the surface coacts with the vessel in which the storage system is contained, or to which it is connected, for quick and easy retrieval and connection of the connector element to the vessel. Additionally, the retrieval line buoy may be provided with sufficient buoyancy capacity to provide an additional lift to the connector element and thus aid the flotation tanks in maintaining the connector element when not in use at a preselected depth in the water.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: September 3, 1991
    Assignee: Bluewater Terminal Systems N.V.
    Inventors: Jacob de Baan, Willem Jan van Heijst
  • Patent number: 5042414
    Abstract: The device according to the invention comprises an anchor, a chain connecting the anchor to a craft and a heavy stabilizing piece which, when the anchor is on the sea-bed, is fast with the chain in an immersed zone of the chain. The stabilizing piece consists of an assembly composed of two masses of the same triangular shape, connected together at one apex of the triangle by the pin of a pulley, allowing the piece to slide on the chain. This stabilizing piece is maintained fast with the chain above the sea-bed, thanks to a rope of which one end is fixed to the piece by a support and of which the other end is fixed to the craft. The invention is more particularly applicable in the domain of craft of low tonnage.
    Type: Grant
    Filed: January 11, 1990
    Date of Patent: August 27, 1991
    Assignee: ALERTIE (S.A.R.L.)
    Inventors: Francois Jaffeux, Remi Jaffeux
  • Patent number: 5025743
    Abstract: A mooring system is provided, which can be rapidly installed and which is of relatively low cost. The system includes a transfer structure attached to a vessel, an anchor line extending from the transfer structure to a chain table near the sea floor, and catenary chains extending from the chain table to the sea floor. A weight hangs from the chain table to help in setting up the system and in mooring a vessel thereafter. The transfer structure includes a platform that can rotate with respect to the vessel, and a direction sensor for controlling a motor that rotates the platform opposite to rotation of the vessel, to avoid twist of the anchor line.
    Type: Grant
    Filed: November 20, 1987
    Date of Patent: June 25, 1991
    Assignee: Amtel, Inc.
    Inventor: Jack Pollack
  • Patent number: 5007029
    Abstract: The present invention relates to a undersea relocation system and more particularly relates to an apparatus for relocating underwater objects by means of a retrievable line carrying buoyant spool which is released to the surface responsive to a remote signal, the spool line remaining connected to the object to be relocated.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: April 9, 1991
    Inventor: Sherman A. Scott
  • Patent number: 4968183
    Abstract: In an anchoring arrangement for releasable anchoring of the legs of a marine tension leg platform in a foundation on the sea floor, the lower ends of the tension legs with an end head (1) are lowered into a cylindrical anchoring casing (4). For anchoring the leg in the foundation, locking elements (7) are provided at the tension leg insertion end of casing (4), on the inside of the cylindrical casing wall, for cooperation with bosses (2) on tension leg head (1). Anchoring casing (4) is, furthermore, on the outside of its cylindrical wall, at the insertion end, provided with further bosses/grooves (10). The latter are intended for cooperation with bosses (14,15) and grooves which are provided on the inside of a cylindrical steel ring (13), which is intended to be integrallly moulded into the foundation on the sea floor. Over the end edges of casing (4) and the cylindrical integral ring (13) a locking ring (16) is provided on a contact face to provide additional fixation of the anchoring.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: November 6, 1990
    Assignee: Kvaener Brug A/S
    Inventors: Henrik Hannus, Raymond E. Rogers
  • Patent number: 4960064
    Abstract: A land anchor includes a hammer element that permits the anchor to be driven into the soil. The anchor also includes a stabilizing assembly that increases the anchoring force of the anchor for loose soils. The stabilizing assembly includes a wing section that is expanded from a stored, ground-entering configuration to a ground-gripping configuration by operation of a screw extending within a central rod of the anchor. The hammer is located on the rod.
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: October 2, 1990
    Inventors: Gilbert L. Mestas, Joseph G. Mestas, Jr.
  • Patent number: 4958805
    Abstract: A windlass for offshore structures comprises power mechanism (18) for rotation of a chain wheel (13) about a horizontal axis (24a) during maneuvering of an anchor chain (14) extending between an anchor and a chain box (15). The chain wheel (13) is rotatably supported in a wheel housing (24) which is pivotable about a vertical shaft (22) below the operating water line (OD) of the structure and on the outside of its planking.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: September 25, 1990
    Inventor: Robert Willamsson
  • Patent number: 4941776
    Abstract: An anchorage line comprising a large number of successive elements interconnected in an articulated way and each including a closed watertight tube delimitating an interior volume full of air. The anchorage line comprises a shallow depth extremity providing the link with a floating vehicle and a very deep anchorage extremity providing anchorage on an ocean bottom. The floatability of the anchorage line varies according to its length. The tubular essential parts of the anchorage line have a wall thickness related to their diameter and which is thicker the nearer these parts are to the anchorage extremity of the line. The anchorage line may be assembled on site and put in place by a suitable device.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: July 17, 1990
    Assignees: Seamet International, S.M.F. International
    Inventors: Jean-Michel Bosgiraud, Andre Cendre
  • Patent number: 4928618
    Abstract: A tubular member includes a pair of cooperating sections hingedly connected together longitudinally thereof and arranged to be open to allow an anchor line to be inserted or removed laterally therein from the side. The cooperating sections have releasable fastening portions to allow insertion or removal of the anchor line. The tubular member has an anchor line engaging lever with an operative position capable of providing unidirectional axial movement of the anchor line through the tubular member. A float is connected directly to the anchor line engaging lever and controls the operation thereof in an anchor retrieving function, or in a function wherein the device serves as a marker buoy.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: May 29, 1990
    Inventor: Walter R. Kubli
  • Patent number: 4926780
    Abstract: A sea anchor and apparatus for deploying the sea anchor into water and for storing it when not in use. An associated method provides for the deployment of the sea anchor into water and storing the sea anchor after use.
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: May 22, 1990
    Inventor: Fred A. Wiehagen
  • Patent number: 4912464
    Abstract: A motion detector is physically attached to a boat's anchor. Upon abnormal motion or movement of the anchor, indicative of a dragging anchor, a pulse generator is initiated by the motion detector to actuate a transmitting transducer and generate an acoustic or sonar wave in the water. The acoustic wave is sensed by a receiving transducer on the boat, and a warning alarm is produced. In a preferred embodiment, the receiving transducer actuates an RF transmitter which generates a radio wave, and an RF receiver which is tuned to receive the radio wave actuates the alarm.
    Type: Grant
    Filed: February 17, 1989
    Date of Patent: March 27, 1990
    Inventor: Donald H. Bachman
  • Patent number: 4889065
    Abstract: A method for pulling an anchor line through a pretensioner adapted to act as a cable or chain stopper and to be deeply submerged so that the line is tensioned at a favorable low incline with respect to the ocean bottom.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: December 26, 1989
    Inventor: Rob van den Haak
  • Patent number: 4878452
    Abstract: The present invention is an improved platform-mounted apparatus for holding and rapidly releasing a flexible load line having the properties of a wire rope. The invention comprises wedge gripper means for holding the line up to a tensile force substantially equal to the breaking strength of the line, with the gripper means comprising a grip frame for mounting to the platform and a pair of opposed grip wedges, the wedges having opposed internal gripping surfaces for engaging the line and external wedging surfaces that taper toward each other in the direction of the tensile force in a gripped line, each grip wedge having a wide end and a narrow end. Grip connection means connect the wide end of each grip wedge to the grip frame, said grip connection means defining a lower travel limit for each grip wedge in the direction of the tensile force in a gripped line.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: November 7, 1989
    Assignee: Amca International Corporation
    Inventors: James B. Regan, George J. Ikovich, James A. Carlsen, Richard J. Juelich, Henry G. Kogel
  • Patent number: 4864956
    Abstract: A yieldable mooring line for a boat comprises a coil spring with first and second spring key clevises connected to opposite ends of the spring and projecting therefrom. A chain at one end is connected to the first spring clevis. A line is removably anchored to the boat, and a snap-on is secured upon one end of the line which is removably connected to the other end of the chain. The second spring clevis is adapted for connection to a dock or piling.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: September 12, 1989
    Inventor: John Onstwedder, Jr.
  • Patent number: 4862821
    Abstract: In an anchoring system for a floating vessel which includes an anchor line comprising chain cable, a chain locker and a windlass having a chain wheel that conveys the chain cable during paying out from the chain locker, a mechanism is positioned between the chain locker and chain wheel to back-tension the chain during paying out. The mechanism has an axis along which the chain is passed with every second links oriented in a given plane. Paired brake shoes are positioned to either side of the plane and define braking surfaces of sufficient extent along the axis of chain movement that a given chain link and an immediately succeeding link of similar orientation can be simultaneously engaged during their movement to provide a continuous retarding effect. One pair of braking shoes is pivotally mounted on an appropriate support structure and urged with hydraulic cylinders towards the other pair thereby causing the brake shoes to engage the opposing faces chain link.
    Type: Grant
    Filed: May 10, 1988
    Date of Patent: September 5, 1989
    Assignee: John T. Hepburn, Limited
    Inventor: Ronald Ballantyne
  • Patent number: 4856450
    Abstract: A method for insuring safe anchorage comprising anchoring or mooring a boat, determining the anchor rode for the anchored or moored boat, and displaying, for the anchored or moored boat, in a location visible to incoming vessels, an indicia indicative of the scope ratio for the boat.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: August 15, 1989
    Inventor: Douglas H. Lubahn
  • Patent number: 4841898
    Abstract: An anchoring system for a floating structure is described. The anchoring system is of the type which employs a combination anchor line consisting of a lower length of chain cable connected to an anchor and an upper length of wire rope and which involves disconnection of the wire rope from the chain cable during paying out and retrieval of the anchor line. A winch and windlass mounted on the floating structure serve to separately haul in and pay out the wire rope and chain cable, respectively. The windlass has a length of lead chain which can be used to lead the chain cable over a chain wheel to the chain locker. An overwide chain link terminates the chain cable, and together with a pair of detachable links permits the load of the chain cable to be transferred directly from the winch to the windlass, during paying out and retrieval, without the requirement for an intermediate chain hanger.
    Type: Grant
    Filed: May 8, 1986
    Date of Patent: June 27, 1989
    Assignee: John T. Hepburn, Limited
    Inventor: Ronald Ballantyne
  • Patent number: 4839873
    Abstract: A subsea acoustic relocation system provides an apparatus that includes in one embodiment an anchor, and in another embodiment a weighted frame having in part a casing which has an inner bore with an open top portion. A line canister connected to the anchor or disposed within the casing bore has an opening through which a contained canister line can pay out. The canister line is placed within the line canister and is anchored at one end to the anchor or frame, the other end of the canister line being a free end which dispenses from the canister during operation. An acoustic transponder release assembly is detachably affixed to the anchor or frame (within the casing bore) at a provided removable connection which can be broken by an acoustic signal. The acoustic transponder release assembly has attached to it the free end of the line canister with the acoustic transponder release forming a temporary connection of the free end of the line to the frame.
    Type: Grant
    Filed: August 7, 1985
    Date of Patent: June 13, 1989
    Assignee: Cochrane Subsea Acoustics, Inc.
    Inventors: Douglas A. Cochrane, Jr., Fred W. Styer
  • Patent number: 4820217
    Abstract: A device is provided for avoiding twisting of a flexible line having two ends one of which is connected to a revolving joint having two parts, one of these two parts being integral with said end and the outer part of said revolving joint being integral with floating installation movable with respect to the other end of said flexible line. The device of the invention further includes means for setting one of the parts of said revolving joint in rotation with respect to the other.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: April 11, 1989
    Assignee: Institut Francais du Petrole
    Inventors: Philippe Joubert, Jean Falcimaigne
  • Patent number: 4802431
    Abstract: An offshore fluid transfer system is described for transferring fluid between an underwater pipe and a dynamically positioned vessel at the sea surface, which is relatively lightweight and economical. The system includes a riser having an upper end attached to the vessel and a lower end having a chain table held by chains extending in catenary curves to the sea floor and weighted by a weight hanging by the chain table. The riser supplied substantially the only mooring force most of the time, while thruster equipment on the vessel supplies sufficient additional force a small amount of the time to limit vessel drift in violent storms. The upper several meters of the riser is a rigid pipe, and an instrument that measures tilt of the pipe indicates the amount and direction of drift of the vessel.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: February 7, 1989
    Assignee: Amtel, Inc.
    Inventor: Jack Pollack
  • Patent number: 4774903
    Abstract: Several cables extend between a buoyant body to be moored and the sinker on the sea bed. Intermediate spacing members hold the cables apart from one another to maintain the configuration. At zero rotation when the tether formation itself is in equilibrium half the number of cables exert a clockwise torque and half exert an equal and opposite anticlockwise torque. Any small rotation of the moored body causes the tension to increase in the cables opposing such rotation and to decrease in the other cables, so the body is restored to the equilibrium position. The tether thus exhibits high torsional stability. Cables can be configured to enable the tether to tilt relative to the buoyant body or sinker whilst still retaining high torsional stability.
    Type: Grant
    Filed: January 20, 1987
    Date of Patent: October 4, 1988
    Assignee: The Marconi Company Limited
    Inventors: Graham E. Goold, Michael D. Cooper
  • Patent number: 4775346
    Abstract: An apparatus for anchoring a flotation device is comprised of a plurality of adjustable straps attached at respective first ends thereof to a lower major surface of a flotation device which is in contact with the water. A suction device is attached at a second end of each strap opposite from the first end thereof, for securing the corresponding strap to a stationary object, such as the side of a swimming pool. By attaching selected ones of the straps to a stationary object and adjusting the respective lengths of the selected straps, the flotation device can be anchored in a substantially fixed position and desired orientation with respect to the statonary object. Thus, a sunbather can position the flotation device as desired with respect to the location of the sun to take full advantage thereof. The anchoring apparatus according to the present invention is suitable for attachment to flotation devices of various types and materials.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: October 4, 1988
    Inventors: Terry L. Gunter, Cheryl A. Meliones
  • Patent number: 4724789
    Abstract: A chaser of a hook type for laying-out and weighing an anchor and intended for tensioning of an anchor line to an embedded anchor.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: February 16, 1988
    Inventor: Rob van den Haak
  • Patent number: 4722293
    Abstract: An integrated winch and windlass for hauling in and paying out a mooring line which consists of wire rope serially connected to chain cable is described. The integrated system has a pair of traction winch drums for conveying the wire rope, and a chain wheel for conveying the chain cable. The chain wheel is coaxially mounted with one traction winch drum, and has a wire rope groove with a groove diameter substantially the same as that of the traction winch drums. A sheave directs wire rope between one of the drums and the chain wheel, and is so positioned that a wrap of wire rope is formed about the chain wheel whenever the system is operating on wire rope exclusively. A drive mechanism is provided for rotating the traction winch drums and chain wheel, including a common drive shaft, and a clutch mechanism which permits the traction winch drums and the chain wheel to be located simultaneously or separately.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: February 2, 1988
    Assignee: John T. Hepburn, Limited
    Inventors: Derek Foster, Ronald Ballantyne
  • Patent number: 4704982
    Abstract: What is proposed in accordance with the invention is a sea anchor so arranged, after having been dropped, as to be capable of gliding obliquely forwards through the water along a flat, inclined plane so as to land on the bottom in a holding position at a considerable horizontal distance from the boat or vessel which dropped the anchor. For this purpose the shank of the anchor is combined with a transverse wing corresponding to the pair of arms of the conventional anchor. The wing has a marked `V` form and is noticeably swept back, causing it to adopt a stable attitude during its glide through the water, in conjunction with which it takes with it an achor rope which further stabilizes its glide. The wing as a whole is preferably pivotally connected to the anchor leg, for example by means of a pivot bolt, in which case the central section of the wing is extended rearwards to a spade-like, tapering structure which ends in a point.
    Type: Grant
    Filed: April 11, 1986
    Date of Patent: November 10, 1987
    Inventor: Agge Sahlberg
  • Patent number: 4681059
    Abstract: A floating vessel has an upper portion with heavy equipment (such as drilling equipment, for example) mounted thereon. Also provided are:(a) structure for anchoring the vessel at a selected site on a body of water, pg,2(b) such structure including anchor lines effectively attached to the vessel and also extending away from the vessel to transfer loading to the vessel at upper and lower locations associated with the vessel and spaced from the vessel center characterized in that tilting of the vessel is resisted by such lines.
    Type: Grant
    Filed: June 6, 1985
    Date of Patent: July 21, 1987
    Inventor: William A. Hunsucker
  • Patent number: 4659254
    Abstract: A marine unit for location on the sea bed has a cylindrical body and legs which are connected to the body by a pivot adjacent one end of the body. Each leg has a toothed member which engages a common worm driven by a motor. The legs are connected by webs of net. The body and nets nest within the legs for storage, the legs are partly opened for the descent, and are opened fully when the unit reaches the sea bottom to support the unit with its axis approximately vertical.
    Type: Grant
    Filed: August 15, 1985
    Date of Patent: April 21, 1987
    Assignee: BAJ Limited
    Inventors: Charles D. Papworth, Andrew L. Pole, Arthur L. Brake, Ivan H. Dimmock
  • Patent number: 4637336
    Abstract: A relatively permanent anchoring arrangement for a decommissioned tanker which is connected to an undersea flexible transfer hose, uses a spreader beam suspended under the tanker by a plurality of mooring hawsers which are guided on the hull of the tanker. A support column structure having a vertical axis is suspended from and supported by the spreader beam. The support column structure comprises a diver's chamber which includes a massive peripheral bearing which enables relative rotary movement between the diver's chamber and the support column. The diver's chamber is anchored and fastened using a plurality of anchor chains. The diver's chamber can be evacuated and made dry for a diver to enter for purposes of bearing inspection maintenance. A fluid proof rotary joint housed in the diver's chamber is provided for connecting an undersea flexible transfer hose to a rigid transfer tube emerging from the tanker at the bottom thereof. Anchoring in high seas is effective by this arrangement.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: January 20, 1987
    Assignee: Blohm & Voss AG
    Inventor: Jurgen Engelskirchen
  • Patent number: 4630522
    Abstract: An accoustically detonated explosively separable link comprising a pair of bolt assemblies mounted in spaced operative relation within the separable link parts, each of which includes a bolt having a cavity therein. An explosive is provided in each cavity and an electrically actuated exploding bridge wire is connected with each explosive for detonating the same. A miniaturized acoustical receiver assembly is mounted within the link parts and includes a hydrophone for receiving a transmitted acoustical detonation signal, batteries and circuitry operatively connected with the hydrophone, the batteries and exploding bridge wires for conducting an electrical current from the batteries to the exploding bridge wires in response to the hydrophone receiving a transmitted acoustical detonation signal.
    Type: Grant
    Filed: March 1, 1985
    Date of Patent: December 23, 1986
    Assignee: Baldt Incorporated
    Inventors: James E. Palmer, Rocco D. Albertini, Michael A. Coladonato
  • Patent number: 4616590
    Abstract: A semi-submersible drilling rig or the like having a plurality of chain lockers, a plurality of anchor windlass assemblies and a plurality of fairlead assemblies, a plurality of lengths of chain each having a multiplicity of interconnected links configured to move from a chain locker in cooperative relation through an associated anchor windlass assembly and an associated fairlead assembly, an anchor for each length of chain, and a connector connecting each anchor to the end of the associated length of chain outboard of the associated fairlead assembly so as to engage with the water bottom. The invention further comprises providing in each length of chain at least one link normally disposed within the chain locker inboard of the associated anchor windlass and fairlead assemblies, each of which includes a plurality of removably interconnected parts operable when interconnected to interengage with the adjacent links of the associated length of chain.
    Type: Grant
    Filed: May 7, 1984
    Date of Patent: October 14, 1986
    Assignee: Baldt Incorporated
    Inventors: Rocco D. Albertini, Ralph E. Clements, Thomas V. Grzeczkowski
  • Patent number: 4612869
    Abstract: An anchor system includes an anchor line having a first section proximate a floating structure, a second section proximate the anchoring ground or sea bed and an intermediate section comprising a sinker cable. The first and second sections are anchor chain comprising alternately disposed single link members and double link members pivotably interconnected with transverse bolts. The bolts are welded to the double link members and gaskets about the bolts are provided between the single and double link members to protect the portion of the bolt about which the single link member pivots. The anchor chain, proximate the floating structure, preferably includes anodes disposed to prevent corrosion. In another embodiment, the anchor chain is galvanized to inhibit corrosion.
    Type: Grant
    Filed: January 3, 1984
    Date of Patent: September 23, 1986
    Assignee: Blohm & Voss AG
    Inventor: Horst Poppe