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| Number | Title | Issue Date |
| 6205927 | Electric impulse cartridge An electric pyrotechnic cartridge or primer device comprises a generally cylindrical nonconductive plastic body having a conical cavity opening to one end wall, a rod-like electrode centered in the cavity and extending to the opposite end wall and a secon... | 03/27/2001 |
| 5830831 | Surfactant blends for well operations Blends of alkyl polyglycoside surfactants having an alkyl chain length of C11 to C16 and blends of alkyl polyglycoside surfactants, in the presence of an ethoxylated alcohol cosurfactant, will form Winsor type III microemulsions in a water-oil mixture in ... | 11/03/1998 |
| 5725060 | Mill starting device and method A mill starting device for use in a pipestring in a wellbore which provides an inclined wall for guiding the mill to a shoulder stop so that when the mill is operated it preferentially bites into the shoulder stop and a method for using the device togethe... | 03/10/1998 |
| 5713731 | Radial compliance mechanism for co-rotating scroll apparatus A scroll type fluid handling apparatus, such as a refrigeration compressor, has co-rotating driver and idler scroll members supported for rotation about offset, generally parallel axes. The idler scroll member has a support shaft which is supported on the... | 02/03/1998 |
| 5698014 | Liquid carryover control for spiral gas liquid separator A spiral or auger type gas-liquid separator, particularly for well production fluid flow, includes a vertically oriented conduit section having a spiral separator element disposed therein and around a central gas discharge conduit. The inlet to the gas di... | 12/16/1997 |
| 5683236 | Anti-reverse rotation valve for scroll compressor A scroll-type refrigeration compressor has a gas-liquid mixture discharge passage extending through the driver scroll drive shaft for discharging refrigerant gas and entrained lubricant into a high pressure chamber in the compressor housing. An anti-rever... | 11/04/1997 |
| 5680904 | In-the-hole percussion rock drill A hydraulic reciprocating percussion tool, particularly adapted for drilling applications, comprises an elongated cylinder, opposed fronthead and backhead members and a central bore in the cylinder for supporting a reciprocating piston hammer. The piston ... | 10/28/1997 |
| 5663491 | Method for steam quality measurement Steam quality in flow lines equipped with orifice meters may be determined by injecting a predetermined quantity of water into the flow line and measuring the orifice pressure differential with and without water injection. An approximation of the James co... | 09/02/1997 |
| 5633038 | Method of treatment of pipelines and other steel surfaces for improved coating adhesion Carbon steel surfaces, particularly inside wall surfaces of steel pipelines, are treated with an organosilane coupling agent to improve the adhesion of epoxy, vinyl ester and similar polymer-type protective coatings to the surface. The organosilane coupli... | 05/27/1997 |
| 5622604 | Coke cooling apparatus A rotary coke cooling drum is formed of plural opposed folded plates welded together and having spaced apart openings for receiving an array of tubular cooling pockets which are separately formed and are insertable in the openings to provide heat transfer... | 04/22/1997 |
| 5617921 | Over-pressured well fracturing with surface reservoir and actuator system Fractures are initiated or extended into fluid producing earth formations from a well by providing a reservoir of high pressure gas at the earth's surface together with a flow control valve or a frangible closure, such as a shear disk, interposed in a con... | 04/08/1997 |
| 5613557 | Apparatus and method for sealing perforated well casing Perforations and other openings in well casings, liners and other conduits may be substantially blocked or sealed to prevent fluid flow between the casing or liner interior and an earth formation by placing a radially expansible sleeve adjacent the perfor... | 03/25/1997 |
| 5609478 | Radial compliance mechanism for corotating scroll apparatus A scroll type fluid handling apparatus, such as a refrigeration compressor, has co-rotating driver and idler scroll members supported for rotation about offset, generally parallel axes. The idler scroll member has a support shaft which is supported on the... | 03/11/1997 |
| 5596267 | Apparatus and method for measuring potentials through pavements for buried pipeline cathodic protection systems Fluid transmission pipelines and similar structures which are cathodically protected from electrolytic corrosion and are disposed in urban areas under pavements and other structures which prevent access to the soil for verifying pipe-to-soil potentials ar... | 01/21/1997 |
| 5582113 | Modular pallet A modular pallet is made up of plural injection molded plastic pallet members, each of which has a plurality of posts spaced apart from each other and depending from a deck portion of the pallet member. The pallet members may be rectangular, square or of ... | 12/10/1996 |
| 5570744 | Separator systems for well production fluids Hydrocarbon fluid production wells and similar process flowstreams have a spiral baffle-type separator interposed in a surface flowline for separating fluids of different densities, such as gas from oil or gas from oil and from water, for example. Particu... | 11/05/1996 |
| 5553666 | Standoff insulator and method for well pump cable A standoff insulator and support for an elongated power cable disposed adjacent to a fluid conducting tubing string for a fluid production well utilizing an electric submersible pump connected to the tubing string. The pump power cable is held in a stando... | 09/10/1996 |
| 5544672 | Slug flow mitigation control system and method Liquid slug flow in oil production well flowlines and the like is controlled by a throttling valve in the flowline upstream of a gas-liquid separator and a differential pressure gauge, densitometer or other device for measuring the presence and the volume... | 08/13/1996 |
| 5535632 | Systems and methods for measuring flow rates and densities of the components of oil, water and gas mixtures Multiphase fluid flowstreams of gas, oil and water are measured by flowmeters which include an embodiment using a turbine flowmeter and a densitometer with total accuracy in the range of &#b1;15%, and an embodiment using a gas-liquid separator and a Corio... | 07/16/1996 |
| 5536115 | Generating multiple hydraulic fractures in earth formations for waste disposal Slurried solids waste materials are disposed of into a preselected subterranean disposal zone by generating radially extending hydraulic fractures from a disposal well and filling the primary fractures with disposal material until screenout is observed or... | 07/16/1996 |
| 5533572 | System and method for measuring corrosion in well tubing Corrosion in well tubing strings, pipe and similar conduits may be determined by a circuit which includes a current sensitive meter and a known voltage source which is placed at selected intervals in the tubing string to make current flow measurements and... | 07/09/1996 |
| 5531890 | Oil separation and disposal systems Oil-separation and recovery from marine oil spills is carried out by a system which includes a containment boom, a weir and/or foil type skimmer, a separator unit and a second, fire proof containment boom for receiving separated oil in a closed containmen... | 07/02/1996 |
| 5531270 | Downhole flow control in multiple wells Remotely controllable fluid flow control valves are disposed in the main wellbore and branch wellbores of a multiple well. Each flow control valve has a radio frequency range receiver, a controller and an actuator for moving a closure member to a selected... | 07/02/1996 |
| 5529123 | Method for controlling fluid loss from wells into high conductivity earth formations A method of reducing fluid loss into a highly conductive formation interval during drilling and completion of a well through such an interval wherein a foamed cement slurry, including an acid or oil soluble component, is injected into the well and forced ... | 06/25/1996 |
| 5524475 | Measuring vibration of a fluid stream to determine gas fraction Multiphase fluid flowstreams may be analyzed to determine to gas fraction of the fluid by defining a zone in a conduit in which the fluid flowstream is caused to vibrate either laterally or longitudinally at a resonant frequency of vibration of the fluid ... | 06/11/1996 |
| 5512889 | Downhole instruments for well operations Pressure and temperature signals are transmitted between a predetermined point in a wellbore and the earth's surface by an electromagnetic wave transmitter disposed in the well and connected to a bow-spring centralizer forming one contactor of a dipole an... | 04/30/1996 |
| 5502267 | Organic and metallic waste disposal in bentonite-water mixtures Organic waste such as hydrocarbon waste, refinery sludges, tank bottom sludges, certain wastes from paint, solvent and wax manufacturing and active metals and active metal oxide compositions are disposed of by combining such compositions with bentonite an... | 03/26/1996 |
| 5497831 | Hydraulic fracturing from deviated wells Deviated wells, in particular, are hydraulically fractured at reduced rates and with higher viscosity fracturing fluids if the fracture design indicates during an initial test fracture that the instantaneous shut-in pressure, upon cessation of injection, ... | 03/12/1996 |
| 5489740 | Subterranean disposal of wastes Toxic wastes including naturally occurring radioactive materials are disposed of into subterranean earth formation zones which are bounded both above and below by zones which have higher in situ compressive stresses. The materials are prepared in a slurry... | 02/06/1996 |
| 5482117 | Gas-liquid separator for well pumps A gas-liquid separator for a well pump includes a stationary helical baffle disposed in a tubular housing for separating gas from liquid and conducting gas through a center conduit disposed in the housing to a tubing string in communication with the separ... | 01/09/1996 |
| 5474097 | Scale removal and disposal system and method A pipe and tube cleaning system, particularly useful for cleaning scale from pipes and tubes used in oil and gas production operations and containing naturally occurring radioactive materials in the scale, includes an elongated closable tub for supporting... | 12/12/1995 |
| 5475309 | Sensor in bit for measuring formation properties while drilling including a drilling fluid ejection nozzle for ejecting a uniform layer of fluid over the sensor Earth formation evaluation for detection of hydrocarbon fluids is carried out by a microwave frequency range sensor (antenna or wave guide) disposed in the face of a diamond or PDC drill bit configured to minimize invasion of drilling fluid into the forma... | 12/12/1995 |
| 5472057 | Drilling with casing and retrievable bit-motor assembly A wellbore is formed in the earth with an elongated, non-rotating tubular drillstem which may consist of a well casing or liner and including an expendable sub and reamer bit part connected to the lower distal end of the drillstem. A retrievable drilling ... | 12/05/1995 |
| 5469645 | System for recovery of oil from snow and ice surfaces A land vehicle system for collecting crude oil and other contaminants which have been spilled on snow and ice covered surfaces includes a crawler tractor having an auger type collection and transfer mechanism mounted forwardly thereof for skimming the con... | 11/28/1995 |
| 5467290 | Survey system and method A survey system including a survey instrument operable to receive signals indicating the Easting, Northing and elevation of a surveyed point. The survey instrument transmits data regarding the surveyed point coordinates to a radio terminal mounted on the ... | 11/14/1995 |
| 5463164 | Waste disposal in subterranean earth formations Predetermined quantities of slurried solids wastes are injected into earth formation waste disposal zones having a predetermined in situ stress distribution and compaction rate for a predetermined hydraulic injection pressure and wherein the disposal zone... | 10/31/1995 |
| 5458197 | Well cleanout system and method Oil or water based drilling muds, together with other wellbore contaminants such as pipe thread sealants and lubricants are displaced from the well and the wellbore surfaces are cleaned by a system of four serially pumped fluid pills. The first stage flui... | 10/17/1995 |
| 5458200 | System for monitoring gas lift wells Multiple gas lift valves interposed in a well tubing string are each configured to have gas flow ports adapted to emit a predetermined acoustic signal for transmission through the well to a microphone or similar acoustic signal receiver whereby a determin... | 10/17/1995 |
| 5456319 | Apparatus and method for blocking well perforations Perforations and cracks in wellbore liners or casings may be temporarily or permanently covered by a radially-expansible, coiled sleeve member formed by a sheet of elastically-deflectable material such as stainless steel which is coiled and placed in a cy... | 10/10/1995 |
| 5442934 | Chilled gas transmission system and method Gas compression and chilling systems, particularly adapted for compressing and chilling gas for transmission through arctic pipelines are provided with a cross heat exchanger for transferring heat from gas compressed to the inlet gas to the compressor. Th... | 08/22/1995 |
