Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5205364 | Process and drilling equipment for sinking a well in underground rock formations The present invention is a drilling tool including a telescoping assembly for transmitting hydraulic force to the drill bit at the bottom of the tool. The internal hydraulic characteristics of the tool may be varied to vary the force through extension and... | 04/27/1993 |
| 5168941 | Drilling tool for sinking wells in underground rock formations The present invention provides an apparatus for orienting a drilling tool in a borehole, and which employs drilling mud pressure to selectively hydraulically move force-transmitting elements associated with pressure members on the exterior of the tool aga... | 12/08/1992 |
| 5148875 | Method and apparatus for horizontal drilling The present invention comprises a method and apparatus for simultaneously drilling and casing a wellbore. More specifically, the apparatus comprises an outer conduit string containing an inner drill string carrying a bit capable of drilling a wellbore of ... | 09/22/1992 |
| 5042015 | Measuring method and apparatus The present invention comprises a method and apparatus for measuring the linear dimensions and determining the three-dimensional spatial volume of an object. In the preferred embodiment, all three linear dimensions are ascertained using the travel time of... | 08/20/1991 |
| 5007919 | Method and apparatus for patient protection against vessel rupture from balloon-tipped catheters The present invention comprises a safety inflation apparatus for preventing full inflation of a catheter balloon in a small body cavity of lesser internal diameter than that of the fully-inflated catheter balloon. The present invention includes a safety r... | 04/16/1991 |
| 4976324 | Drill bit having diamond film cutting surface An improved diamond drill bit is provided which has a diamond film cutting surface. The drill bit comprises a body member and a plurality of cutting members, each including a diamond cutting face formed from a diamond substrate coated with a diamond film.... | 12/11/1990 |
| 4919013 | Preformed elements for a rotary drill bit A rotary drill bit and process of fabrication in which internal fluid passages and watercourses of the bit are lined with a hard metal matrix material which renders the fluid passages more resistant to the erosive forces of the drilling fluid is provided.... | 04/24/1990 |
| 4913244 | Large compact cutter rotary drill bit utilizing directed hydraulics for each cutter An improved rotating drag bit for cutting plastic, sticky, water reactive and shale formations is devised by providing a plurality of large diamond cutters having a circular cutting face in excess of three quarter inch in diameter. Each large cutter is pr... | 04/03/1990 |
| 4901804 | Articulated downhole surveying instrument assembly An articulated downhole surveying instrument and method for measuring parameters of a wellbore includes one or more laterally flexible coupling sections. The laterally flexible coupling sections are rigid in axial tension and axial compression, and are sm... | 02/20/1990 |
| 4901290 | Apparatus for the generation of pressure pulses in drilling mud compositions The apparatus for the generation of pressure pulses in a drilling mud composition which flows downward in a drill string (1) is composed of a valve (V) inside the drill string (1), with a stationary, braced, tubular exterior housing (3), tubular primary v... | 02/13/1990 |
| 4884477 | Rotary drill bit with abrasion and erosion resistant facing A rotary drill bit is provided for boring earth formations which includes a bit blank and a metal matrix secured to the blank. The metal matrix includes a filler material dispersed therein. Cutting elements are mounted on the exterior face of the bit, and... | 12/05/1989 |
| 4883136 | Large compact cutter rotary drill bit utilizing directed hydraulics for each cutter An improved rotating drag bit for cutting plastic, sticky, water reactive and shale formations is devised by providing a plurality of large diamond cutters having a circular cutting face in excess of one inch in diameter. Each large cutter is provided wit... | 11/28/1989 |
| 4866607 | Self-contained downhole gauge system In an oil well instrumentation system, the downhole sensor system is controlled by a computer which is powered-on only during sampling movement. An independent circuit, continuously powered, detects significant sensor rate-of-change values whereby the com... | 09/12/1989 |
| 4858205 | Multi-barrel air gun module The present invention comprises a multi-barrel seismic source air gun module for use in a marine environment, preferably comprising a plurality of air gun barrels symmetrically disposed in a single plane about and rigidly secured to a control head contain... | 08/15/1989 |
| 4855967 | Seismic vibrator hold-down weight monitor/controller The disclosure relates to a seismic vibrator having an airbag isolator, a transducer for monitoring the instantaneous air pressure within the airbags, a summer to add the pressures within each air bag and a calibrated weighting network to convert the comp... | 08/08/1989 |
| 4805407 | Thermomechanical electrical generator/power supply for a downhole tool A downhole tool for an oil or gas well includes a self-contained power supply having a housing in which a primary fuel source, a Stirling cycle engine, and a linear alternator are disposed. The primary fuel source includes a radioisotope which, by its rad... | 02/21/1989 |
| 4783739 | Input/output command processor An input/output command processor provides a sophisticated communication link between a central processor and peripheral digital apparatus. The command processor receives commands from the central processor, interprets them and transmits them to the perip... | 11/08/1988 |
| 4782897 | Multiple indexing J-slot for model E SRO valve The present invention comprises a novel, improved connector mechanism for connecting a probe and a pipe string portion of a wireline based data transmission system. The connector mechanism includes cooperating pin and channel means, one of said means asso... | 11/08/1988 |
| 4770212 | Pressure compensated flow rate controllers A flow controller apparatus having few moving parts that may be inserted directly into a flow line to be responsive to flow pressure and maintain the flow rate constant. The flow controller consists of a tubular frame section having an internal bore that ... | 09/13/1988 |
| 4736798 | Rapid cycle annulus pressure responsive tester valve The present invention comprises a rapid cycle tester valve operable in response to annulus pressure. The tester valve includes a valve ball rotatable between open and closed positions through an operating mechanism which includes a ball and slot ratchet m... | 04/12/1988 |
| 4735264 | High pressure gauge carrier The high pressure gauge carrier of the present invention uses an outer gauge carrier housing having disposed therein a pressure-tight inner housing carrying a temperature gauge in the interior thereof. The inner housing is substantially filled with a comp... | 04/05/1988 |
| 4730676 | Downhole foam generator A method and apparatus for generating foam in a well bore, the apparatus being a foam generator comprising a tubular body having a plurality of apertures circumferentially spaced about the wall thereof, the tubular body containing a choke therein disposed... | 03/15/1988 |
| 4729432 | Activation mechanism for differential fill floating equipment A differential fill valve assembly for application in float collars or shoes in well casing. The valve assembly comprises a back pressure flapper valve disposed within a substantially tubular upper housing, and a lower housing containing an activating sle... | 03/08/1988 |
| 4711123 | Bundle type downhole gauge carrier A bundle type gauge carrier including a support assembly which may be loaded with a plurality of downhole gauges, the support assembly being quickly insertable in a case assembly incorporated in the pipe string used for a formation test. The gauges are gr... | 12/08/1987 |
| 4697613 | Pressure compensated flow rate controllers A flow controller apparatus having few moving parts that may be inserted directly into a flow line to be responsive to flow pressure and maintain the flow rate constant. The flow controller has an internal bore that is a revolutional chamber having a maxi... | 10/06/1987 |
| 4697641 | Sinker bar assembly The cable head provides an H2 S resistant assembly which includes a weak link therein substantially isolated from any stress other than tensile stress induced by the logging cable. The cable head also provides a fishing neck at the top of the t... | 10/06/1987 |
| 4698510 | Multiple reservoir transportation assembly for radioactive substances, and related method A transportation assembly includes a single container having a primary confinement receptacle and a secondary confinement receptacle in which the primary confinement receptacle is retained. In the preferred embodiment the primary confinement receptacle ha... | 10/06/1987 |
| 4694903 | Flapper type annulus pressure responsive tubing tester valve The tubing tester valve of the present invention comprises a tubular housing assembly having a downwardly closing, spring biased flapper valve disposed therein near the top thereof. A tubular mandrel assembly is disposed within the housing assembly below ... | 09/22/1987 |
| 4694754 | Multi-phase charge holder A shaped charge carrier assembly apparatus includes a carrier having a plurality of carrier segments integrally formed from a single substantially flat elongated sheet of structural material. An interconnecting portion is located between each two adjacent... | 09/22/1987 |
| 4675259 | Electrical energy package and method of assembly A self-contained electrical energy source, particularly embodied as a linear array of interconnected battery cells, includes a housing having the cells linearly disposed therein. At the two ends of the housing, mechanical connectors are provided for coupl... | 06/23/1987 |
| 4673890 | Well bore measurement tool A caliper is mounted on two springs in a free-floating manner between interlockable upper and lower packers to be set in a well bore. The caliper has radially extendible arms which are extendible in response to independent forces exerted thereon as derive... | 06/16/1987 |
| 4671361 | Method and apparatus for hydraulically releasing from a gravel screen The present invention comprises a method and apparatus especially suitable for hydraulically releasing from a screen on a circulation-type gravel pack job. The releasing tool of the present invention comprises a tubular case by which the tool is secured t... | 06/09/1987 |
| 4667743 | Low pressure responsive tester valve with ratchet An annulus pressure responsive tester valve includes a tool housing having a flow passage disposed therethrough. A ball valve is disposed in the flow passage and rotatable between closed and open positions. An actuating mandrel is operably connected to th... | 05/26/1987 |
| 4665983 | Full bore sampler valve with time delay A sampler valve including a tubular housing defining a cylindrical chamber of enlarged diameter in comparison to the remainder of the full bore extending through the valve, an axially slidable sample chamber mandrel adapted to span the length of the enlar... | 05/19/1987 |
| 4664196 | Downhole tool with compressible liquid spring chamber A downhole tool such as a tester valve originally constructed to operate with a compressible gas spring may be modified to operate with a compressible liquid spring. The volume of a spring chamber is increased. A differential area of a power piston is dec... | 05/12/1987 |
| 4665398 | Method of sampling and recording information pertaining to a physical condition detected in a well bore A physical condition in a well bore is sampled and information taken from the sample is recorded by a method of conserving electrical energy in performing such sampling and recording. The method sequentially energizes and de-energizes a plurality of diffe... | 05/12/1987 |
| 4662446 | Liner seal and method of use A liner seal for use in a tool string for sealing above a gravel pack around a liner screen. The liner seal is originally positioned in the tool string between the liner screen and a release mechanism. The release mechanism is a pressure actuated, non-rot... | 05/05/1987 |
| 4661020 | Leg closure--improved fabric layup The ply overlap arrangement of the present invention comprises alternating the orientation or overlap direction of each ply of fabric strips with respect to a section of the peripheral reinforcing member so that each successive overlap end of strip is wra... | 04/28/1987 |
| 4658895 | Gravel pack safety sub A gravel pack safety sub selectively positionable in rotational or a non-rotational mode. The safety sub includes an adapter having lugs thereon and a mandrel having lugs thereon adjacent the adapter. A retainer attached to the adapter receives an end of ... | 04/21/1987 |
| 4659993 | Apparatus including an equipotential housing and plurality of focused current electrodes for electrically logging a well formation at more than one lateral distance from a borehole An apparatus and a method are disclosed wherein simultaneous electrical well logs can be made with a plurality of focused currents emitted from a plurality of electrodes located along a single equipotential surface of a housing. The focused currents are g... | 04/21/1987 |
