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| Number | Title | Issue Date |
| 4540047 | Flow controlling apparatus This application discloses apparatus in which a body means having a bore therethrough connected as part of a tubing string is packed off within a well bore, and means including a passageway in the body means by-passes the packer to connect the annulus abo... | 09/10/1985 |
| 4508313 | Valves There is disclosed a blowout preventer having rams with cutting edges for shearing a pipe within which carry means for gripping opposite sides of the pipe above the cutting edges of the rams, as the rams move toward one another to shear the pipe, and lift... | 04/02/1985 |
| 4505332 | Well packers There is disclosed a dual well string, hydraulically operated, retrievable packer in which one mandrel connectible with one well string is releasably connected to the body means of the packer to permit it to be lowered therewith, and the other mandrel con... | 03/19/1985 |
| 4505331 | Side pocket mandrel There is disclosed a side pocket mandrel having upper and lower sections which are adapted to be connected to a well tubing string and which have lower and upper ends, respectively, which are coaxial with one another but with respect to the axes of their ... | 03/19/1985 |
| 4502007 | Method of measuring NMR spin-spin relaxation time (T2) using spin-echos A method is disclosed for measuring the NMR spin-spin relaxation time (T2) of nuclei using spin-echos comprising the steps of locating the nuclei in a static magnetic field, applying an RF pulse to the nuclei at the Larmor frequency of the nucl... | 02/26/1985 |
| 4500267 | Mud pump A multicylinder, double acting improved mud pump is disclosed, the preferred embodiment incorporates a hydraulic powered piston in a cylinder which connects with a piston rod which, in turn, drives a second piston in a cylinder adopted to pump fluid mud. ... | 02/19/1985 |
| 4498126 | Lighting fixture with relamping socket apparatus A hinged bracket for permitting the swinging away, within limits, of at least one socket to permit easy access to an elongated, doubled-ended bulb for relamping purposes, the relamping apparatus holding the bulb firmly enough to prevent its dropping out o... | 02/05/1985 |
| 4496172 | Subsea wellhead connectors There is disclosed a remotely operable, subsea wellhead connector for connecting the lower end of one wellhead member to the upper end of another wellhead member which is mounted in an upright position beneath the water surface, such connector including a... | 01/29/1985 |
| 4493061 | Stacked marine seismic source An arrangement of a plurality of individual gas expansible marine sources, wherein the positive portions of the primary shock waves are additive in effect, the negative portions of the primary shock waves are not additive in effect and the positive and ne... | 01/08/1985 |
| 4491346 | Apparatus for releasably connecting tubular members in end-to-end relation There is disclosed apparatus for releasably connecting first and second tubular members in end-to-end relation including a split lock ring having first and second axially spaced locking teeth which are carried by the first member for radial movement toget... | 01/01/1985 |
| 4488703 | Valve apparatus There is disclosed a blowout preventer having rams which are moved between opened and closed positions by means of operating systems having axially reciprocable rods releasably connected to the rams for relative axial movement with respect thereto. The co... | 12/18/1984 |
| 4488595 | Well tool having a slip assembly There are disclosed several embodiments of a well tool having a slip assembly which is adapted to grippingly engage a cylindrical surface within a well conduit, and which includes a sleeve carried by a body adapted to be lowered into the well conduit so a... | 12/18/1984 |
| 4486863 | Circular seismic acquisition system A marine seismic survey is disclosed in which a plurality of steerage centers are selected for circular traversal thereabout by a marine vessel towing a streamer cable. While the vessel and the streamer are following a circular track about a steerage cent... | 12/04/1984 |
| 4485509 | Continuous batch type washing machine and method for operating same There is disclosed a continuous batch type washing machine wherein means are provided for exchanging liquor in one or more of the successive compartments in which individual drums are rotatable in order to avoid injury to the goods due to incompatibilitie... | 12/04/1984 |
| 4485137 | Concrete curing blanket An improved concrete curing blanket of light weight, high water retention and wicking action, and connectable into coverage of large concrete surface. The blanket has a surface layer (e.g. three mils) of low density polyethylene carrying any pigments that... | 11/27/1984 |
| 4483224 | Stabilizers for a steady rest A stabilizer for a steady rest is disclosed for supporting rotating cylindrical members during machining operations and the like that includes idler wheels supported by air jacks that allow limited lateral movement of idler wheels to accommodate at least ... | 11/20/1984 |
| 4482844 | Lamp dimmer A lamp dimmer suited for fluorescent and other lamps which controllably notches the applied voltage to a lamp circuit each half cycle. Progressively larger dimming control voltages produces progressively wider notches as well as progressively causing the ... | 11/13/1984 |
| 4481541 | Camera for CRT monitor A camera for photographing the image on CRT monitors is disclosed that locates a magazine containing a roll of film below a vertical aperture plate and a cassette above the aperture plate to receive the exposed film so that the film exposed through the op... | 11/06/1984 |
| 4479306 | Process of manufacturing and using gauges for verifying threads of tubular members A ring gauge is made from the box end of an authenticated precision threaded member and a plug gauge is made from the pin end thereof. The pin end is machined laterally and radially at its nose to ensure complete engagement of the threads. The box end is ... | 10/30/1984 |
| 4477136 | Takeout connector The invention disclosed includes a takeout connector having a body of elastomeric material with first and second protruding cylindrical portions. A male plug and a female socket in side-by-side relationship in each cylindrical portion. The second cylindri... | 10/16/1984 |
| 4477104 | Releasable latching apparatus There are disclosed two embodiments of an apparatus for releasably latching the lower end of a tubing string within the bore of an upstanding well conduit by means of latching parts adapted to be received in latching position beneath a shoulder in the bor... | 10/16/1984 |
| 4474240 | Drilling fluid displacement process A process for eliminating drilling fluid (mud, solids and oil) from a well system prior to introduction of solids-free completion and packer brine. Drilling fluid is displaced by circulating through well pipe and annulus of a treated water (surfactant and... | 10/02/1984 |
| 4471422 | Dc-to-ac Inverter A dc-to-ac inverter employing a control low power section and a power section. The low power section comprises a square wave generator, cross-coupled NOR latches and low level transistor switches for providing switching current to the power section. The p... | 09/11/1984 |
| 4468055 | Wellhead apparatus There are disclosed two embodiments of wellhead apparatus for use in suspending concentric strings of casing of an offshore well at the ocean floor. For this purpose, an inner hanger to which the inner casing is connected is adapted to be landed within an... | 08/28/1984 |
| 4467825 | Shuttle valve assembly A shuttle valve assembly formed with a body having a plurality of nesting housings, an outlet end housing with a fluid signal outlet and a closed end housing. These housings have an aligned axial passageway containing a plurality of tubular spool valve me... | 08/28/1984 |
| 4467866 | Flow controlling apparatus There is disclosed apparatus for use in controlling flow within a well bore wherein each of two or more well tubing strings are suspended from the head of the well, and a mandrel connected as a part of each string, in a position spaced vertically of the o... | 08/28/1984 |
| 4467265 | Battery charger A battery charger with an SCR providing high charging current to a battery until a predetermined high voltage level is sensed. When the voltage sensed reduces to a float voltage minimum level, a trickle charge current is supplied through another SCR until... | 08/21/1984 |
| 4458511 | Key holder A key holder for mounting keys in a key case by a novel support member. The member provides a permanent mounting for a plurality of key loops adapted for releaseably carrying keys or the like. The key loops have stable forward and rearward positions subst... | 07/10/1984 |
| 4456537 | Chemically cleaning drilling/completion/packer brines A process for removing contaminating solids from high density, salt type aqueous drilling/completion/packer fluid prior to its introduction into a well bore. A small effective amount (e.g., 0.5% volume) of an aliphatic alcohol (e.g., n-hexanol) and a surf... | 06/26/1984 |
| 4453598 | Drilling mud displacement process An improved displacement process for eliminating drilling mud (solids and oil) from a well system prior to introduction of solids-free completion and packer brine. Clean water is circulated in the well system to remove and carry the major portion of the d... | 06/12/1984 |
| 4453863 | Trench shoring device There are disclosed two embodiments of a trench shoring device of the type having rails which are forced against the sides of the trench by one or more fluid actuated, extendible and retractible braces connected to and extending between the rails. In one ... | 06/12/1984 |
| 4452056 | Liquid extracting apparatus There is disclosed apparatus for extracting liquid from cloth goods, such as laundry from a washing machine, wherein a dome having a diaphragm across its lower end is mounted above a press plate which is reciprocable beneath the dome between an upper posi... | 06/05/1984 |
| 4449897 | Single-acting piston pump having two heads A single-acting piston pump for output connection to a high pressure manifold and to an input of slush or slurry. The forward head of the piston pump is mounted for contact with the slush or slurry. In one embodiment, this forward head of the piston pump ... | 05/22/1984 |
| 4447104 | Apparatus for attaching a multiconductor cable to a housing Apparatus for attaching a multiconductor cable to a housing, such as the backshell of a connector, is disclosed that has a seal member located in the opening in the tubular section of the housing through which the cable extends into the housing to seal th... | 05/08/1984 |
| 4446730 | Specific gravity independent gauging of liquid filled tanks A liquid sensing and gauging method and apparatus employing a differential pressure sensing device located near the bottom of the tank and an absolute pressure sensing device located at the same level as one of the differential pressure sensing device ele... | 05/08/1984 |
| 4445727 | Method of attaching a wear strip to downhole members A method of encircling the outside surface of a downhole tool joint with wear strips of cast, relatively brittle, drillable material in which the strips have notches in their abutting ends, and weld metal is puddled in openings formed by the notches. The ... | 05/01/1984 |
| 4443920 | Method of manufacturing a gate valve body There are disclosed two embodiments of a gate valve having a forged body in which a generally rectangular cavity to receive the gate for opening and closing each flowway through the body is formed by drilling a first hole within the forging from which the... | 04/24/1984 |
| 4442703 | Pipe testing apparatus There is disclosed apparatus for use in hydrostatically testing a length of pipe, wherein the pipe is closed at both ends, and a pin is provided for interchangeably connecting hoses leading from high volume, low pressure and low volume, high pressure pump... | 04/17/1984 |
| 4440241 | Method and apparatus for drilling a well bore A method of and apparatus for drilling directional well bores is disclosed in which the well bore or a portion thereof is drilled along a line that follows, as close as possible, a preselected catenary curve. An extensible joint located between a stabiliz... | 04/03/1984 |
| 4440223 | Well slip assemblies There is disclosed an hydraulically set well packer wherein sleeves carried about a tubular member which is connected as part of a tubing string are adapted to be moved from axially extended to axially retracted position in order to expand packing and sli... | 04/03/1984 |
