Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 4652096 | Shield A periscope instrument control protection plate having specific finger openings for predetermined positioning over instrument controls, said plate having sides affixable to said control periscope to thereby position said protection panel plate to provide ... | 03/24/1987 |
| 4566979 | Stable mixture of crosslinkable components promptly activatable as acting treating agents A dry mixture of a crosslinking compound and a hydratable gelling agent where said dry mixture is storable for at least three months during which time it is readily activatable to rapidly produce an active, high-viscosity acidic treating fluid.... | 01/28/1986 |
| 4361187 | Downhole mixing valve A mixing valve for use in cementing, fracturing or other treatment of a well. The valve, which may be mounted in a pipe string, comprises a center mandrel surrounded by a coaxial housing having circumferentially spaced apertures therethrough. A packer cup... | 11/30/1982 |
| 4346770 | Hydraulic jarring tool A hydraulic well jar of the type having a longitudinally slidable inner mandrel within an outer case, the inner mandrel having a hammer element threon which impacts on an anvil element in the case. Hydraulic fluid is disposed between the case and mandrel.... | 08/31/1982 |
| 4346761 | Hydra-jet slotting tool The present invention relates to an apparatus for controlling the rate and extent of cutting slots in flow conductors, particularly casing in wells. The apparatus is hung in the well from a pipe string, locked in position, and force applied to the string.... | 08/31/1982 |
| 4338713 | Method of manufacture of powdered metal casing Disclosed herein is a powdered metal casing and an apparatus and method for making the powdered metal casing, which casing is useful for shaped explosive charges for perforating oil and gas wells.... | 07/13/1982 |
| 4338999 | Knockout pin trap A trap to catch knockout plugs or "pins" from casing inflation packers. The trap is mounted in the well casing above a float valve, and catches pins falling from casing inflation packers in the casing above it as these pins are broken off by a cementing p... | 07/13/1982 |
| 4330419 | Method of and solvent for removing inorganic fluoride deposits A composition for dissolving insoluble fluoride deposits and methods of treating subterranean formations and industrial vessels using such solution to remove fluoride deposits. The solvent comprises boric acid, methanol and hydrochloric acid.... | 05/18/1982 |
| 4328567 | Methods and apparatus for acoustic logging in earth formations An acoustic well logging system is provided for measuring the speed of propagation of all acoustic wave propagation modes of earth formations penetrated by a borehole simultaneously. A linearly changing frequency swept acoustic signal is generated and rec... | 05/04/1982 |
| 4324669 | Foamed high viscosity aqueous inorganic acid solutions and methods of using the same Foamed high viscosity aqueous inorganic acid solutions and methods of treating subterreanean well formations using such solutions are provided. The foamed acid solutions are comprised of water, at least one water soluble inorganic acid, a gelling-foaming ... | 04/13/1982 |
| 4324668 | High viscosity acidic treating fluids and methods of forming and using the same High viscosity acidic treating fluids comprised of aqueous acid solutions containing zirconium cross-linked hydrophilic organic polymers are provided having improved viscosity and temperature stability properties. Methods of forming such acidic treating f... | 04/13/1982 |
| 4321829 | Density measuring apparatus A density measuring apparatus includes a container for holding a fluid to be tested, a balance arm having a first end attached to the container, a fulcrum for supporting the balance arm, and a balance weight slidably disposed on the balance arm. The balan... | 03/30/1982 |
| 4322181 | Conductor pipe plug and method of installing conductor pipe A plug for sealing the end of conductor pipe of off-shore platforms comprising a cylindrical housing filled with a core of cementitious material, the housing being fixed to the end of the conductor pipe. A method of installing the conductor pipe is also d... | 03/30/1982 |
| 4315543 | Seal system for wellhead isolation tool diffuser A seal system for a wellhead isolation tool diffuser utilizing elastomeric cup-shaped seals installed on the exterior of the diffuser, which is inserted into the production tubing at the wellhead. After insertion of the diffuser, the production tubing is ... | 02/16/1982 |
| 4313834 | High viscosity acidic treating fluids and methods of forming and using the same High viscosity acidic treating fluids comprised of aqueous acid solutions containing zirconium cross-linked hydrophilic organic polymers are provided having improved viscosity and temperature stability properties. Methods of forming such acidic treating f... | 02/02/1982 |
| 4298063 | Methods and apparatus for severing conduits Apparatus for severing a conduit along a plane extending transversely through the conduit which includes an elongated housing forming a pair of longitudinally spaced-apart fuel chambers communicated by an impingement passage extending longitudinally betwe... | 11/03/1981 |
| 4296807 | Crossover tool A crossover tool for use with concentric tubing strings. The apparatus disclosed provides the ability to treat and/or gravel pack a producing zone in a well, and is particularly suited for use in a multiple-zone well. The crossover tool may be locked in a... | 10/27/1981 |
| 4295524 | Isolation gravel packer A method and apparatus for gravel packing a producing formation or zone in a well without inducing fluid movement across the zone being packed during reverse circulation. Packing and reverse circulation are effected without any movement of the tool string... | 10/20/1981 |
| 4290486 | Methods and apparatus for severing conduits Apparatus for severing a conduit along a plane generally transverse to the axis of the conduit which includes two confined explosive charges aligned axially with the conduit and terminating at opposed proximal convexly shaped ends facing each other across... | 09/22/1981 |
| 4289576 | Method for removing cobalt-containing deposits from surfaces By this invention there is provided a method for dissolving cobalt (II) and cobalt (III) compounds by contacting said compounds with an aqueous acidic solution comprising a compound containing a radical selected from the group consisting of cyano, cyanato... | 09/15/1981 |
| 4288696 | Well logging neutron generator control system A pulsed neutron well logging system using a sealed off neutron generator tube is provided with a neutron output control system. The control system monitors the target beam current and compares a function of this current with a reference voltage level to ... | 09/08/1981 |
| 4288332 | Methods and compositions for treating subterranean formations Methods and compositions for treating subterranean formations whereby the loss of formation adsorbable additives from the treating compositions is reduced or prevented by including in such compositions certain methyl ether, sulfate ester or amine compound... | 09/08/1981 |
| 4281840 | High temperature packer element for well bores This invention relates to packer element design for use in high temperature well bores. Packing material of asbestos fibers impregnated with a thermoplastic and interwoven with Inconel wire is employed in a center packer ring of triangular cross-section d... | 08/04/1981 |
| 4276185 | Methods and compositions for removing deposits containing iron sulfide from surfaces comprising basic aqueous solutions of particular chelating agents Methods and compositions for removing deposits containing iron sulfide from surfaces with minimal hydrogen sulfide evolution. A composition comprised of a basic aqueous solution of a chelating agent selected from the group consisting of citric acid, oxali... | 06/30/1981 |
| 4273050 | Placement method for Q.D. charges using minimum diving time An apparatus for the simultaneous placement of a plurality of objects on a substantially horizontal surface is disclosed, said apparatus comprising a platform to position the objects, release mechanisms to releasably attach the objects to the platform and... | 06/16/1981 |
| 4273047 | Apparatus for perforating a well and its method of assembly Disclosed is a method and apparatus for attaching shaped charge units into a well perforating gun. The shaped charge unit has an ear shaped extension having a cavity for receiving a wire in the perforating assembly. A second extension is positioned on the... | 06/16/1981 |
| 4273190 | Method and apparatus for gravel packing multiple zones A method of gravel packing multiple zones with a single trip of the operating string into a well without inducing fluid movement across zones, and without disturbing the zone being packed in reverse circulation. Apparatus is disclosed to perform the metho... | 06/16/1981 |
| 4270608 | Method and apparatus for gravel packing multiple zones A method of gravel packing multiple zones with a single trip of the operating string into a well without inducing fluid movement across zones, and without disturbing the zone being packed in reverse circulation. Apparatus is disclosed to perform the metho... | 06/02/1981 |
| 4262743 | Diffuser for wellhead isolation tool An improved diffuser for a wellhead isolation tool which employs a combination of angles in its bore. This improvement reduces the incidence of erosion caused by the flow of fluids through the diffuser, in both the well production tubing adjacent the end ... | 04/21/1981 |
| 4233000 | Variable ratio intensifier An improved differential pressure hydraulic pressure convertor whose ratio of output pressure to input pressure may be easily varied comprising a valve housing, a pump housing having a cylindrical bore therethrough, a power cylinder including a differenti... | 11/11/1980 |
| 4233162 | Oil well fluids and dispersants The invention of this application is a dispersant system with various embodiments and subcombinations with exceptional dispersions including colloidal suspensions, aqueous hydrocarbon emulsions and emulsions with solid particulate additives dispersed ther... | 11/11/1980 |
| 4231882 | Treating subterranean well formations A method of treating a subterranean well formation wherein a low pH highly viscous thixotropic treating fluid is introduced into the formation. The treating fluid is formed by combining an aqueous acid solution with an aqueous alkali metal silicate soluti... | 11/04/1980 |
| 4230424 | Leg closure A diaphragm for closing the bore of a tubular pile guide member and/or supporting leg member of a marine platform or similar structure, the diaphragm comprising reinforced elastomeric material having fabric type reinforcing means bonded to one or more rei... | 10/28/1980 |
| 4220687 | Powdered metal casing for perforating charge and its method of manufacture Disclosed herein is a powdered metal casing and an apparatus and method for making the powdered metal casing, which casing is useful for shaped explosive charges for perforating oil and gas wells.... | 09/02/1980 |
| 4220422 | Leg closure A diaphragm for closing the bore of a tubular piling guide member and/or supporting leg member of a marine platform or similar structure, the diaphragm comprising reinforced elastic material wrapped around and bonded to a plurality of reinforcing members ... | 09/02/1980 |
| 4219081 | Knockdown centralizer An improved centralizer includes upper and lower collars with a plurality of spring members attached at upper and lower ends to said collars. Each of said collars includes a first and second arcuate collar portion. A first peripheral end portion of said f... | 08/26/1980 |
| 4218316 | Method of clarifying and removing water from water-solids suspensions A method of clarifying and removing water from water-solids suspensions wherein the solids are formed into flocculent masses and clarified water is continuously removed by the withdrawal thereof through a screen.... | 08/19/1980 |
| 4218080 | Repairable composite seal ring A seal assembly for a conduit connection including a first and a second conduit part, each having an axially extending flow passage and an end surface radially intersecting the flow passage. Each of the conduit parts includes an internal sealing cavity ad... | 08/19/1980 |
| 4217229 | Oil well spacer fluids A high stability, nondamaging spacer fluid is provided containing readily available weighting agents such as calcium carbonate and iron carbonate dispersed in water using a polymer viscosifier, a salt inhibitor, a primary sulfonated dispersant and a secon... | 08/12/1980 |
| 4216570 | Method of assembling a shock absorber employing a coil spring A piston and cylinder motion dampening device having a spiral groove metering, an orificed two-way pressure relief valve or a screw-on spring or an over-extension limiting seal retainer. A push-together method of assembling a piston and cylinder motion dampeni... | 08/12/1980 |
