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7284615 |
A pipeline installation and maintenance method and system is disclosed in which a number of interconnectible platform modules are assembled into drilling platforms from which a segmented pipeline route is flexibly installed. Using modifi...
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7255180 |
A modular transfigurable drilling rig comprises one or more transfigurable containers with drilling equipment to form an operational drilling rig. The transfigurable containers include a first and second load bearing support and a load b...
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6926097 |
An offshore jack-up workover rig. The workover rig includes a vessel which may be self powered or powered by a tug. The vessel may be raised above the surface of a water body by extending the legs until they reach the water body bed and ...
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6901998 |
The invention is a method for drilling a well and for well intervention using a multipurpose system on a pivoting, slidable cantilever on a platform to drill a well and to perform well intervention operations, wherein the method involves...
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6615915 |
The present invention is a wellhead system for use in completing at least two well bores from within a single conductor housing. The wellhead system comprises at least one wellhead housing which is supported on the conductor housing and ...
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6609573 |
A pipe handling system is designed for use on an offshore structure, particularly an offshore structure provided with a cantilevered drill floor. The pipe handling system allows to handle significantly longer sections of tubulars, up to ...
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6409430 |
A drilling and production template for sub-sea wells comprises a plurality of individual limbs ( 1-4 ) each with a central hub ( 10-14 ) at one end of an arm ( 11-41 ) and a drilling receptable ( 12-42 ) on the other end of the arm. The ...
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6374924 |
A downhole drilling apparatus for interconnection in a casing or liner string having a drill bit disposed thereon for enabling the drilling of intersecting wellbores without removal of the drill bit is disclosed. In a disclosed embodimen...
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6275758 |
The present invention provides a method and apparatus for determining the cross slope created by a work implement on an earth moving machine. The method includes the steps of determining a position of the work implement, determining a di...
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6247541 |
A method for replacing an old drive pipe in a slot on an offshore platform. The old drive pipe is first cut to provide an upper portion and a stub portion which remains firmly embedded in said marine bottom. Next, a guide cable is affixe...
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5441112 |
An integrated oil drilling and producing base includes a single guiding funnel for guiding a wet Christmas tree into the proper position on a high pressure well head. The single guiding funnel has a cylindrical downcomer for resting dire...
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5248003 |
A cantilevered jack-up rig having a support for supporting the free ends of the rig's cantilever beams when said beams are extended over a platform to be serviced by the rig, thereby maximizing the lateral reach of the rig and increasing...
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5098219 |
A mobile submersible caisson is employed to drill for and recover petroleum products from subsea wells and to deliver the products to shore or to vessels at the well site. The well drilling technique applies to water depths beyond 300 ft...
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5012875 |
A method and apparatus for protecting an isolated well conductor of a shallow-water well by positioning a reinforcing frame with pile sleeves next to the well conductor near the water surface and driving piles through the pile sleeves in...
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4907657 |
Method of utilizing a jack-up well drilling rig in shallow water to drill an isolated well having an unsupported well conductor, and subsequently to attach a reinforcing frame near the water line and to drive pile through the frame into ...
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4848966 |
A production platform for offshore exploitation of hydrocarbons comprises a truss tower (1) which rests on the sea floor (2) and supports a deck structure (3) provided with a drilling module (5). In order to obtain optimum mutual distanc...
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4739840 |
Method and apparatus for reinforcing a shallow water unsupported well conductor by positioning a well jacket adjacent the well conductor, raising the jacket to a selected height above the ocean floor, driving pile through the legs of the...
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4733732 |
In order to salvage a slot path on an offshore platform wherein the original conductor pipe has become clogged or otherwise rendered unusable, the original conductor is cut off below mudline, thereby leaving a stub forming a base upon wh...
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RE32623 |
Apparatus and method for producing hydrocarbons from a subterranean hydrocarbon-bearing formation located beneath the floor of a body of water. A platform structure is installed on the floor over the formation and well conductors are ext...
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4711604 |
For the installation of an anchor member at a location below a water level through a retaining wall into a soil formation for supporting the wall, a drill mount is pivotally mounted about a horizontal axis on a retaining member secured t...
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4633953 |
A method is provided for producing usable hydrocarbon product from an offshore reservoir. The method includes the economically desirable step of producing a valuable hydrocarbon product from the formation, soon after its being discovered...
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4591295 |
An anchored submerged marine structure commonly referred to as a well template is located at the bottom of a body of water and used in the directional drilling of underwater wells. The well template carries curved well conductors, each c...
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4561803 |
A conductor guide assembly for conductors of an offshore well platform having a jacket with an interior pile for extending from a sea bed to above a water level which is over the sea bed. In accordance with one inventive feature, a first...
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4561802 |
A conductor guide assembly for conductors of an offshore well platform having a jacket with an interior pile for extending from a sea bed to above a water level which is over the sea bed. In accordance with one inventive feature, a first...
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4497372 |
A system for controlling the deviation of the path of oil or gas well conductor casing at a desired angle, curvature and orientation in the sea bottom stratum through which it is driven from an offshore platform involving the use of cond...
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4483644 |
Disclosed is a cantilever mobile marine rig with hydraulic load equalizer. The rig includes a deck structure and a cantilever assembly slidingly mounted on the deck structure. The hydraulic load equalizer includes a plurality of hydrauli...
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4456072 |
An off-shore ice island structure for location over a submerged drill site in waters which normally freeze in winter. The structure includes a buoyant protective caisson which freezes in position over the drill site upon onset of winter....
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4421173 |
A motion compensator for disposition between an offshore support and an offshore well string or the like movable with respect to the support comprises first and second compensator bodies interconnected with the support and the well strin...
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4415045 |
A drilling rig comprises a platform (10) supported above a sea surface (14) by legs which extend to the sea bottom (16). A drill guide (30) of rigid open framework construction extends down from the platform to the sea bottom. The drill ...
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4339005 |
A method and apparatus for installing a curved well conductor (22) from an offshore marine structure (10) utilizes a leading section of precurved pipe (26) along with a plurality of trailing sections of initially straight pipe (24). The ...
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4326595 |
Method for drilling well bores into an offshore substrate from a marine platform which is fixed to the ocean floor. The latter is provided with a cage which is removably positioned in a platform leg. A drill conductor carried in the cage...
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4307785 |
An Angulating Knuckle Lead installed within an offshore pile driving rig having both upper and lower hydraulically actuated supporting kickers, independently operable for driving pile on extreme slope or batter and which is movable upwar...
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4269542 |
This invention relates to a mobile drilling platform of the jack-up type equipped with a special system which allows the said drilling platform to work as a drilling derrick and alternatively as a hoisting crane rig for marine service.
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4249619 |
Marine structure adapted to be fixed to the ocean floor for drilling wellbores into the latter. A drill conductor cage is removably positioned within the marine structure at a submerged position. The cage holds one or more drill string o...
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4249618 |
A method of working an underwater deposit comprises the following stages: (a) constructing and positioning a platform structure, equipped before or after positioning with drilling devices and installations, (b) executing drilling u...
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4165690 |
The invention provides for a drill unit for drilling and charge laying operations and is suitable for operation on land or underwater. The drill unit comprises a rock drill mounted on a frame structure on a gantry and drill steels and ca...
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4147222 |
An acoustic communication system is disclosed as a secondary means for command control of underwater operations from a surface unit. The system includes a diving acoustic command control unit for use in the event of prime propagation pat...
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4144940 |
A method and apparatus for driving conductor pipe in an offshore drilling platform including the steps of mounting a block and tackle on the platform and then lifting a crane onto the platform with it before the drill rig is placed there...
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RE29929 |
A method and technique for a deviated (non-vertical) emplacement of a conductor casing at a desired curver curve and orientation in order to facilitate directional drilling of a well in the substratum of an offshore well site. The me...
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4134461 |
A bottom-positioned well drilling platform is provided with an enclosure in the lower part thereof which forms a chamber into which returning drilling mud and cuttings can be discharged. A pump and separate return line raise the mud alon...
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4126010 |
The invention relates to an oscillating installation installed at a fixed site in a body of water, comprising a shaft which rests on a heavy base, which itself bears on a bed, and which supports a platform at its upper part, the shaft is...
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4109478 |
A novel guide member and guide member support arrangement for guiding a drill conductor from a deck portion of an offshore platform into the bottom of a body of water is disclosed. The guide member is snugly nestled against and positione...
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4108255 |
An apparatus is provided for drilling concurrently a plurality of wells within a laterally confined area. The confines of the drilling apparatus employ a structure having vertically extending walls rising from a drilling floor. A plurali...
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4100754 |
Pipes which are to be inserted vertically into the sea bed for the extraction of fluids therefrom, such as liquids and gases, are connected together in groups, with each pipe group being constructed on shore and then supported horizontal...
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4081932 |
A mobile crane for use on an offshore oil well platform, comprising parallel base beams adapted to span the capping beams of the platform, and a pedestal and a rotating upper works movably mounted on the base beams. A method is described...
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4050590 |
A drilling rig assembly mounted on a pile, the store for drill strings to be used in drilling being in the form of a carousel mounted concentric with the pile.
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4045967 |
A mounting structure for supporting a drilling platform on the ocean floor comprises an open precast vessel having a bottom wall and a side wall extending up from and around the perimeter of the bottom wall which is adapted to be recesse...
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4027734 |
A method and technique for a deviated (non-vertical) emplacement of a conductor casing at a desired curver and orientation in order to facilitate directional drilling of a well in the substratum of an offshore well site. The method provi...
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4010798 |
In a method of completing one or a plurality of grouped underwater oil wells, each well head to be connected is temporarily placed in a gaseous medium at atmospheric pressure during connection to effect this, prior to the installation of...
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3996756 |
A method and apparatus for positioning and supporting a drilling platform on the ocean floor in which the drilling platform is a monopod structure with a broad flat base. The ocean floor is dredged to form a large level area depressed be...
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