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| Number | Title | Issue Date |
| 6216788 | Sand protection system for electrical submersible pump A method and apparatus for removing sand, which has been separated from well fluids, from a well bore. A separator is provided to separate sand from well fluids before the well fluids enter an electrical submersible pump (ESP). A bypass tube is connected ... | 04/17/2001 |
| 6211590 | Spring-applied pad and carrier brake A braking system has a shaft which rotates with a wheel on a vehicle. A rotor rotates with the shaft within a housing. The housing also contains an electromagnetic coil and two armatures. The rearward armature is in contact with the coil while the forward... | 04/03/2001 |
| 6209668 | Earth-boring bit with improved cutting structure An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a cutter shell surface including a gage surface and a heel surface. A plurality of cutting elements inserts are arranged in generally circumferent... | 04/03/2001 |
| 6193474 | Guide member details for a through-tubing retrievable well pump A well pump assembly has an electric motor that is secured to a lower end of a string of production tubing. The motor is powered by a power cable that extends alongside the tubing to the surface. The motor has an upper end with a drive shaft coupling. The... | 02/27/2001 |
| 6186239 | Casing annulus remediation system A casing annulus remediation system for lowering a flexible hose into an annulus between strings of casing in a petroleum well by pressurizing the hose so that the hose is rigid and may be forced down the annulus. It is necessary to insert the hose throug... | 02/13/2001 |
| 6186237 | Annulus check valve with tubing plug back-up A subsea well has a tubing hanger which has an annulus bore and a production bore. A check valve is located in the annulus bore. A running tool runs the tubing hanger on a monobore riser such as a drill string while holding the check valve in the open pos... | 02/13/2001 |
| 6182762 | Storm valve A method and apparatus for temporarily storing the lower portion of a string of drill pipe in a well which has a cased portion wherein a packer, installed between a storm valve located below the packer and an actuator located above the packer, is set in t... | 02/06/2001 |
| 6179748 | Chin-up bar A doorway mounted chin-up bar has a rod with an interior tube that is telescopically received within a rotating sleeve. A mount is positioned on each end of the rod for securing the rod to a doorjamb. A pair of U-shaped extension bars extend outward and u... | 01/30/2001 |
| 6176333 | Diamond cap cutting elements with flats An earth-boring drill bit of the rolling cutter type has cutting elements press fitted into mating holes in the cutter. Each of the cutting elements has a tungsten carbide cylindrical base and a cutting end protruding from the base. A diamond cap is bonde... | 01/23/2001 |
| 6176328 | Drill pipe protection rings and method of using the same Drill pipe protection rings for filling external identification slots in drill pipe tool joints prevent damage to the internal seals of a drilling head. The rings are formed from resilient elastomeric materials. In cross-section, each ring has slightly co... | 01/23/2001 |
| 6167915 | Well pump electrical cable with internal bristle support An electrical cable has helically attached bristles for supporting the electrical cable when pulled through a string of coiled tubing to connect to an electrical submersible pump. The electrical cable and helically attached bristles have a circumscribed d... | 01/02/2001 |
| 6161802 | Trapped vortex airfoil nose An airplane has a plurality of airfoils with leading edges. A partition and a nose cap are located at a forward surface of the airfoil, creating upper and lower cavities. The nose cap may be positioned in an extended position or a retracted position. The ... | 12/19/2000 |
| 6161618 | Subsea control module A subsea control module consists of three primary sections. The lower portion consists of a plate for carrying hydraulic couplings and hydraulic passages from valves to couplings. The lower portion contains a sub-assembly containing electro-optical coupli... | 12/19/2000 |
| 6158309 | Double-drive double-lock ratcheting wrench An ratcheting-type wrench for use in driving a hexagonal nut having a wrench head. The wrench head has upper and lower jaw portions that are rigidly joined by at least one web. The jaws have several faces that allow the wrench to be ratcheted about the nu... | 12/12/2000 |
| 6155141 | Double drive open-end wrench An wrench for use with a nut which protects the nut from damage as torque is applied and can drive the nut in two drive positions. The wrench of this invention has a head having an upper forward drive face opposed to a lower drive face and an upper rearwa... | 12/05/2000 |
| 6152229 | Subsea dual in-line ball valves A dual in-line ball valve assembly for a subsea tree intervention tool has a pair of axially-movable pistons and a rotatable linkage member pinned between each of the pistons and the independently operable ball valves. The linkage members have eccentric h... | 11/28/2000 |
| 6142235 | Bottom-supported guidance device for alignment of multiple wellbores in a single conductor Two or more opposing and outward facing profiles are fabricated and joined to each other along their outer edges, forming a section of a guide string. The sections of the guide string are secured together in an assembly and lowered into a single conductor... | 11/07/2000 |
| 6138780 | Drag bit with steel shank and tandem gage pads A rotary earth-boring drag bit assembly has a bit body formed of a carbide matrix material. The body has a longitudinal axis and a face on a lower end containing cutters for engaging and cutting a bottom of the borehole. The cutters are carried on fixed b... | 10/31/2000 |
| 6138762 | Wellhead connector with additional load shoulders A subsea wellhead connector has an upper body that abuts the rim of a wellhead member. A hydraulic wellhead connector is carried by the upper body and extends over the wellhead member. The hydraulic wellhead connector carries dogs for moving into an engag... | 10/31/2000 |
| 6116359 | Tri-cone kerf gage An earth-boring bit has a bit body with at least one bearing shaft depending inwardly and downwardly therefrom. A cutter is mounted for rotation on each bearing shaft and has a cutter shell surface and a plurality of cutting elements arranged on the shell... | 09/12/2000 |
| 6110429 | Transformation of halogenated refrigerant gases The high temperature combustion of hydrogen and oxygen is used to transform halogenated refrigerant gases (HRGs) and halons to produce calcium fluoride salts. Calcium carbonate is also produced by a series of chemical processes. Calcium chloride is partia... | 08/29/2000 |
| 6102125 | Coiled tubing workover riser An apparatus for performing workover operations on a subsea well that has a subsea production tree with a production passage and an annulus access passageway. The subsea production tree is secured to a lower riser portion. The lower riser portion connects... | 08/15/2000 |
| 6099271 | Downhole electrical submersible pump with dynamically stable bearing system A bearing configuration for use in electrical submersible pumps having improved stability. The bearing configurations include multi-lobed bearings, such as lemon bore, tri-lobe bearings, pocket bearings and tilting pad type bearings.... | 08/08/2000 |
| 6098923 | Aircraft structure to improve directional stability An aircraft structure has an arrangement of aircraft components that provide inherent directional stability for a flight vehicle throughout an angle-of-attack range, even at very high angles-of-attack where conventional means of stabilization are ineffect... | 08/08/2000 |
| 6098715 | Flowline connection system A flowline connection apparatus having a pivotally mounted funnel an upright frame, which is a permanent part of a subsea well installation such as a manifold or subsea production tree. The funnel rotates is rotatably mounted to rotate from a vertical pos... | 08/08/2000 |
| 6095261 | Drill bit reverse circulation apparatus and method An improved bit body for a tri-cone drill bit has a bit body affixed to a terminal end of drilling string. The drilling string has at least one fluid passageway formed in its wall. The drilling string is dual passage drilling string formed of an inner dri... | 08/01/2000 |
| 6029549 | Screwdriver with multi-position shank A screwdriver has a handle having a storage area for storing bits used with the screwdriver. The storage area consists of races formed in the handle that securely hold the extra bits so that they do not rattle and can be seen without removing them from th... | 02/29/2000 |
