| Patent Number |
Title Of Patent |
Date Issued |
| RE31265 |
Method and apparatus for making subsea pipe connections |
June 7, 1983 |
| A subsea pipeline hub is connected to the hub of an adjacent spool piece connected to an in-place manifold of a subsea structure used in the production of oil and/or gas. The pipeline hub is positioned relative to the opposing spool hub and a remotely operated pipeline connecting tool is |
| 5543387 |
Surfactant additive for oilfield acidizing |
August 6, 1996 |
| Subterranean oil-bearing formations are treated with aqueous acid solutions which include an effective amount of an alkoxylated alkyl substituted phenol sulfonate which exhibits both antisludge and demulsification properties. |
| 4837752 |
Method for establishing a common bandwidth for processing seismic data obtained from different s |
June 6, 1989 |
| A common bandwidth determination method for two disparate seismic datasets includes developing a weighted average of first least-squares filters assuming the data from the first dataset is the input and the data from the second dataset is the desired output, developing a weighted average |
| 4715021 |
Method for filtering and combining seismic data having different spectral characteristics |
December 22, 1987 |
| A method of filtering and combining seismic data, such as data from two or more seismic sources having different spectral characteristics. A plurality of seismic signals are transmitted into a subterranean earth formation and a resulting data trace for each seismic signal is recorded. |
| 4685091 |
Method and apparatus for acoustic well logging |
August 4, 1987 |
| Method and apparatus for acoustic wave generation and transmission into a subsurface earth formation. A logging sonde adapted to be suspended in a borehole within the formation houses a generator means for simultaneously generating a plurality of acoustic waves traveling in the direction |
| 4677930 |
Apparatus for quick-release of a storage vessel from a riser |
July 7, 1987 |
| An apparatus is described for securing two offshore mooring sections together. The apparatus is a connector adapted to quickly disengage each mooring section so that an offshore floating storage vessel, having one mooring section attached to it, may be separated from the riser of an |
| 4675604 |
Computerized and motorized electromagnetic flux leakage internal diameter tubular inspection dev |
June 23, 1987 |
| A device for detecting defects in the bore of a tubular member. The device includes an inspection head including an electromagnet for magnetizing the internal surface of a tubular member. The device also includes a sensor or sensors to detect magnetic flux leakage indicative of a defect. |
| 4672588 |
Method for displaying acoustic well logging data by producing travel time stacks |
June 9, 1987 |
| A method for producing a display of acoustic signals received during full waveform acoustic well logging. In a preferred embodiment, the signals received at the individual receiver (or receivers) of the logging tool are stacked along lines of constant acoustic velocity to produce for dis |
| 4671357 |
Method of cementing a casing in a borehole |
June 9, 1987 |
| A method for cementing a casing into a borehole. The borehole is drilled to the desired depth in the usual manner. Before removing the drill string and without substantially interrupting the flow of fluids in the borehole, the mud therein is displaced with a fluid substantially free of |
| 4661017 |
Method and apparatus for aligning underwater components |
April 28, 1987 |
| A method and apparatus for aligning a component with an underwater receptacle is disclosed. The component is attached to one end of a swing arm having a hook attached to the other end. The swing arm is lowered in the water until the hook engages a pivot attached to an underwater base at |
| 4660647 |
Fluid control line switching methods and apparatus |
April 28, 1987 |
| Method and apparatus for altering the downhole flow path of control fluids or the like in oil and gas wells. A downhole side pocket mandrel in a tubing string has interconnected thereto a supply conduit from the surface and a plurality of receiving conduits. Each receiving conduit is con |
| 4658387 |
Shallow water seismic energy source |
April 14, 1987 |
| An apparatus and method for generating a shock wave in water comprising a housing capable of containing compressed gas, attachment means fastened to the housing by which the apparatus is oriented in a selected positioned and exhaust means in the housing positioned to release compressed g |
| 4657116 |
Vibration-isolating apparatus |
April 14, 1987 |
| A vibration-isolating apparatus for protecting equipment from excessive vibrations. The apparatus discloses an equipment-carrying frame attached by shock-absorbing members to a guide member. The guide member is loosely fastened in operational relationship wth a drillpipe or casing to per |
| 4656944 |
Select fire well perforator system and method of operation |
April 14, 1987 |
| A well perforator system and method employs an electromagnetic wave frequency receiver, one for each of at least two gun intervals, that receives a transmitted signal conveyed through well tubing from the earth's surface. The signal is converted to an electrical pulse which detonates |
| 4655641 |
Apparatus for aligning a platform deck and jacket |
April 7, 1987 |
| The present invention provides an apparatus for aligning an integrated deck carried on a barge with a jacket secured to the seafloor. The apparatus comprises a plurality of cantilevered springs extending vertically downward from the deck and a plurality of sockets secured to the jacket, |
| 4655300 |
Method and apparatus for detecting wear of a rotatable bit |
April 7, 1987 |
| The present invention relates to a method and apparatus for detecting excessive wear of a rotatable bit used in drilling. In particular, the apparatus can detect loss of gauge or bearing failure in a bit. The method is accomplished by connecting a restricting means in the drill bit that |
| 4651818 |
Metal seal tubing plug |
March 24, 1987 |
| A plug is disclosed for sealing off in a tubing having a sealing surface. A housing contains an annular metal seal means and two sets of segmented expanding lockdown rings that react with three solid rings to provide a downward motion. The expanding lockdown rings consist of a solid tape |
| 4649529 |
Multi-channel fiber optic sensor system |
March 10, 1987 |
| A time division multiplexing, fiber optic data gathering system, including two or more sensors formed on an optical fiber, and a phase sensitive detector. Each sensor includes two reflectors separated by a section of the fiber having length L. Each reflector may be activated so that when |
| 4649526 |
Method and apparatus for multipole acoustic wave borehole logging |
March 10, 1987 |
| The inventive multipole acoustic wave logging method includes the steps of introducing a 2.sup.n -pole acoustic wave into a virgin earth formation surrounding a borehole but separated from the borehole by an invaded zone, where n is an integer greater than zero, and detecting the refract |
| 4648752 |
Marine template retaining wall and method of construction |
March 10, 1987 |
| A template retaining wall for use in marine environments is composed of a plurality of interconnected, piled, prefabricated templates. Each template comprises a series of vertically extending, horizontally spaced apart legs and a series of battered, horizontally spaced apart legs. The le |
| 4648751 |
Method and apparatus for erecting offshore platforms |
March 10, 1987 |
| A method is disclosed for installing an integrated deck on a platform substructure located in a body of water. The deck is supported on jack-up means which, in turn, are mounted on a rigid pontoon raft having a U-shaped configuration. The jack-up means is capable of raising and lower |
| 4648479 |
Multiple-port, multiple-chamber, tuned air-powered subsea seismic source |
March 10, 1987 |
| The invention is a multi-port, multi-chamber, tuned, air-powered subsea seismic source. It is suitable for producing a seismic wave in a subsea environment during seismic prospecting. Interconnected pressurized chambers are formed between plates located on a movable shuttle and cylin |
| 4648456 |
Method for acidizing siliceous formations |
March 10, 1987 |
| A method for improving the permeability in a subterranean formation by acid treatment is disclosed. In this method, an aqueous acidizing solution containing hydrofluoric acid and excess fluoride is injected into the formation. The acidizing solution dissolves siliceous materials and |
| 4648453 |
Process for remedial cementing |
March 10, 1987 |
| An improved method is disclosed for remedial cementing operations. Prior to conducting the remedial cementing operation, the zone to be cemented is pretreated with a hydrocarbon solvent capable of dissolving hydrocarbons, such as oils and asphaltenes. Following solvent treatment, the zon |
| 4648261 |
Method for determining physical properties of a porous sample using capillary pressure measureme |
March 10, 1987 |
| A method for determining pore-dependent properties, such as electrical conductivity and absolute permeability, of a porous sample by use of capillary pressure measurements. Capillary pressure data are obtained by performing nonwetting fluid intrusion measurements on a sample. The lowest |
| 4646839 |
Method and apparatus for through-the-flowline gravel packing |
March 3, 1987 |
| Methods of gravel packing a subterranean well located subsea utilizing through-the-flowline techniques are disclosed in which a sand slurry is pumped downwardly through one pipe of a dual pipe string and outwardly through an H-type crossover member (14, 15) into a perforated casing area |
| 4637637 |
Pipeline system with encapsulated insulation |
January 20, 1987 |
| A pipeline system which is capable of withstanding a range of extreme temperatures is disclosed. A pipe is surrounded by a vapor barrier which has a corrugated surface facing the pipe. The amplitude of the corrugations changes, absorbing the stress imposed by extreme temperatures, es |
| 4633970 |
Distributed marine seismic source |
January 6, 1987 |
| The invention relates to a compact tunable subsea seismic source. The source has multiple seismic radiating plates placed symmetrically about a central housing which contains a hydraulic actuating system. The source is towed to optimize the amount of energy applied to the surrounding wat |
| 4630970 |
Buoyancy system for submerged structural member |
December 23, 1986 |
| A buoyancy system for a tension leg platform tether 10 or other element extending a significant vertical distance through a body of water. A series of bulkheads 25 divide the interior of the tether 10 into individual buoyancy cells 31. A central access tube 32 extends along the centr |
| 4628468 |
Method and means for determining physical properties from measurements of microstructure in poro |
December 9, 1986 |
| A method and apparatus for predicting pore-dependent physical properties of a microporous solid from measurements of the geometric statistical characteristics of the solid. In a preferred embodiment, the method involves a microscopic determination of the number of geometric features |
| 4626773 |
Method and means for determining rock properties using time-domain dielectric spectroscopy |
December 2, 1986 |
| A method and system for measuring rock electrical properties using time-domain spectroscopy. The rock to be measured is place in direct contact with the substantially flat face of a sample cell. A voltage pulse is launched into a coaxial line connected to the sample cell. The pulse p |
| 4626237 |
Method and apparatus for separating the components of a wellstream |
December 2, 1986 |
| The present invention is a centrifuge method and apparatus for separating the components of a stream, particularly a wellstream. Centrifugal force is used to separate solid and liquid components from gaseous components, and the combined action of centrifugal force and countercurrent flow |
| 4626136 |
Pressure balanced buoyant tether for subsea use |
December 2, 1986 |
| A pressure balanced tether buoyancy system 12 useful for reducing the load imposed on a tension leg offshore platform 24 by the tethers 10 securing it to the ocean bottom. The tether 10 has tubular tether walls 11 defining a central cavity 15 isolated from the surrounding seawater. A ser |
| 4625302 |
Acoustic lens for marine seismic data multiple reflection noise reduction |
November 25, 1986 |
| An improved method and apparatus for gathering seismic data in a region covered by a body of water. Gas bubbles are formed in a zone of water adjacent a streamer containing hydrophones to form an acoustic lens for refracting acoustic waves which have reflected from the sea floor or s |
| 4623022 |
Well sand packing prevention method |
November 18, 1986 |
| A method for producing hydrocarbons from a subterranean formation which reduces sand packing in a producing well completed in a zone adjacent the hydrocarbon-bearing formation. The method includes the steps of producing a fluid from the formation which contains both a hydrocarbon phase a |
| 4619323 |
Method for conducting workover operations |
October 28, 1986 |
| Apparatus for use in conducting well workover operations includes a coiled non-electrically conductive matrix shaped into a string and containing at least one conduit capable of conducting fluids and electrical conductor means capable of transmitting electrical energy through said matrix |
| 4617518 |
Method and apparatus for offshore electromagnetic sounding utilizing wavelength effects to deter |
October 14, 1986 |
| An improved method and apparatus for electromagnetic surveying of a subterranean earth formation beneath a body of water. An electric dipole current source is towed from a survey vessel in a body of water substantially parallel to the surface of the body of water and separated from t |
| 4616706 |
Apparatus for performing subsea through-the-flowline operations |
October 14, 1986 |
| An apparatus and method is described for introducing and removing TFL tools from a subsea wellhead assembly. The apparatus includes an elongate member adapted to hold at least one TFL tool, docking hubs for aligning the elongate member with the wellhead, a clamping mechanism or the like |
| 4615387 |
Annular gas trap |
October 7, 1986 |
| Well apparatus for use in injecting corrosion inhibitor into the annulus between casing and tubing strings below an injection/packer assembly positioned in such annulus which includes an annular gas trap positioned below the injection/packer assembly. The annular gas trap comprises a |
| 4612989 |
Combined replacement drive process for oil recovery |
September 23, 1986 |
| Performing steam drive operations in critical manipulative steps can improve the recovery of viscous hydrocarbons from tar sand deposits. Steam is injected into an injection well at a rate that is less than the rate needed to fracture the formation, and fluids are simultaneously produced |
| 4611685 |
Acoustic logging in low velocity formations |
September 16, 1986 |
| Acoustic logging of low velocity formations is made possible by the introduction of gas bubbles in the liquid in a borehole where logging equipment is present. Acoustic logging cannot be performed where the compressional wave velocity in the borehole liquid exceeds the compressional |
| 4610569 |
Hybrid offshore structure |
September 9, 1986 |
| A hybrid offshore structure for conducting petroleum drilling and producing operations in very deep waters is disclosed. The structure consists primarily of a substantially rigid lower section extending upwardly from the bottom of the body of water to a pivot point located intermediate t |
| 4610161 |
Method and apparatus for determining fluid circulation conditions in well drilling operations |
September 9, 1986 |
| A method and apparatus for establishing the rate at which fluid is transferred between an offshore well 16 and the formations 20 surrounding the well 16 in the course of drilling the well 16 from a floating drilling rig 14. A drilling fluid handling system 31 is used to inject drilling |
| 4609307 |
Anode pod system for offshore structures and method of installation |
September 2, 1986 |
| An anode pod system for cathodically protecting offshore structures and method of installing the system in which a set of anode pod units are individually placed on the ocean floor adjacent an offshore structure. Each anode pod unit comprises a plurality of anodes attached to a top t |
| 4607699 |
Method for treating a tar sand reservoir to enhance petroleum production by cyclic steam stimula |
August 26, 1986 |
| A method for conditioning the virgin drainage area of a tar sand formation that is penetrated by a well for enhanced petroleum production by cyclic steam stimulation is described. The method comprises fracturing the drainage area by injection of liquid carbon dioxide. While carbon dioxid |
| 4606014 |
Acoustic dipole shear wave logging device |
August 12, 1986 |
| The preferred embodiment of this invention includes a logging sonde, an elongated pair of oppositely polarized piezoelectric plates connected to each other by their flat surfaces, and an electrical pulse applying means for applying electrical pulses across the pair of plates so as to ben |
| 4604961 |
Vessel mooring system |
August 12, 1986 |
| The disclosure describes apparatus for mooring a vessel 10 in unprotected waters. The vessel 10 contains a recess 34 in its hull adapted for receiving a buoyant mooring element 18. The mooring element 18 is attached to the ocean floor 12 by a plurality of mooring lines 20. Means are |
| 4602690 |
Detachable apparatus for preventing differential pressure sticking in wells |
July 29, 1986 |
| A removable porous layer is placed on the outside of various well implements. The layer allows movement of liquid toward sites of localized low pressure and therefore prevents differential pressure stickage of the well implements on the borehole wall. |
| 4602586 |
Motion decoupling mechanism for fluid swivel stack |
July 29, 1986 |
| A mechanism for decoupling over a selected angle the rotational motion between a marine vessel moored to a single point mooring system such as a single anchor leg mooring (SALM) and the fluid swivel stack of the single point mooring system. The mechanism includes two spaced-apart stops |
| 4591393 |
Alloys having improved resistance to hydrogen embrittlement |
May 27, 1986 |
| Certain high strength alloys lacking resistance to hydrogen embrittlement are cold worked and heat treated utilizing critical preselected conditions to result in a unique alloy having increased resistance to hydrogen embrittlement without unacceptable loss of strength. It is theorized th |
