Abstract: An apparatus for retrieving downhole devices is disclosed. The apparatus of the present invention includes a retrieving device that can be run on non-conventional workstrings such as coiled tubing, wireline, or electric line. The apparatus comprises a power mandrel, an inner sleeve mandrel slidably disposed within the power mandrel, and an overshot means. Means are provided to translate longitudinal movement of the power mandrel into rotational movement of the inner mandrel.

Abstract: A device to assist in removing a fetus from a woman's birth canal during childbirth is provided having a pliable, elongated, hollow member sized to fit over the head of the fetus, collar means attached at one end of the member to restrict the opening of the hollow member at that end to the desired size and insertion means for inserting the elongated, hollow member over the head of the fetus. The hollow member can be linearly reinforced along it's length.

Abstract: An emission control valve is claimed which is used to control emissions into the atmosphere of a medium, such as liquids, gases, and/or solids, which is being regulated and transported. The apparatus generally comprises a valve body, a valve rack, a first and second valve member disposed within the body, disc means for allowing communication between the first and second valve members, and a pinion member for cooperating with the valve rack.

Abstract: An apparatus and method of anchoring into a packer with a stinger assembly is disclosed. Further, an apparatus and method of releasing from a packer is also disclosed. The apparatus includes an elongated stinger member, a plurality of collet finger members slidably attached to the stinger, a shear ring member with a chamfered shoulder containing a plurality of splined extensions, with a plurality of shear pins contained through the shear ring member. Further, the apparatus includes a load ring attached to the elongated stinger for transferring the load of the downhole tool from the collet finger members to the load ring.

Abstract: A vessel and a steering mechanism for the vessel is disclosed. In one embodiment, the vessel comprises a hull, a motor apparatus for providing propulsion to the hull, a pedestal mounted within the hull, and a pulley device, operably connected to the pedestal, for steering the vessel. The pulley device may comprise a first, second and third rimmed disc which are interconnected by cable means.

Abstract: A bypass valve for bypassing well fluids, and method of use thereof. The valve comprises a tubular housing defining a bypass port therethrough with an inner sleeve mandrel defining a bypass port initially aligned with the bypass port in the housing. The valve also comprises a power mandrel slidably disposed within the housing such that, as weight is set down on the power mandrel, pressure is increased in a first oil chamber which has a rupture disc in communiction therewith. When the pressure reaches a predetermined level, the rupture disc ruptures so that the oil chamber is emptied into the well annulus. This allows the power mandrel to move and strike an operating mandrel which is also slidably disposed in the housing. The jarring force shears a shear pin which allows the operating mandrel to move a floating piston disposed in a second oil chamber. A metering cartridge restricts flow of fluid out of the second metering chamber, thereby providing a time delay for movement of the operating mandrel.

Abstract: An annulus pressure responsive well tool includes a selectively actuatable hydraulic bypass for bypassing a pressure differential across a power piston of the tool so that an operating element associated with the power piston will remain in a chosen position during a subsequent change in well annulus pressure.

Abstract: In combination with a steam generator having a plurality of generator tube support plates, each generator tube support plate having a plurality of openings and a plurality of generator tubes, each tube passing through aligned openings in the support plates, a corrosion monitoring system is provided including a mockup probe, comprising a probe tube support plate having an upper side and a lower side and having substantially the same thickness and being constructed of substantially the same material as the generator tube support plates, having at least one opening of substantially the same size and shape as the openings of the generator tube support plates; at least one probe tube having an upper end and a lower end and having substantially the same diameter as the generator tubes and being constructed of substantially the same material as the generator tubes, the probe tube passing through the opening of the probe tube support plate; and wherein the mockup probe is adapted such that it may be inserted and seal

Abstract: A fluid control valve for use in retaining well treatment fluids above a circulating valve and packer in a tool string. The fluid control valve comprises a ball seat with a seating surface thereon, a sealing ball for sealingly engaging the sealing surface, and a push rod. The ball seat and push rod are relatively movable so that as the packer is set and the circulating valve is moved toward a closed position, the push rod is brought into engagement with the ball so that it is moved off the ball seat, allowing fluid flow thereby. A ball cage extends from the ball seat for guiding the ball and limiting radial movement thereof when the circulating valve is open. A retrieving neck may be connected to the fluid control valve so that the fluid control valve may be retrieved while leaving the rest of the tool string in the well bore.

Abstract: A hydraulically controlled apparatus responsive to changes in well annulus pressure is disclosed. The apparatus is run into a well bore intersecting an oil and gas reservoir with perforations communicating the oil and gas reservoir with the well bore. The apparatus has an associated packer to effectively seal off the perforations in the well bore. The apparatus contains a cylindrical housing with ports on the top end and bottom end, and an operating mandrel is disposed therein. A disengaging sleeve operably connected with the operating mandrel allows the ports contained on the lower portion of the cylindrical housing below the packer to be opened and closed selectively, thereby allowing communication of the reservoir pressure through the apparatus. The disengaging sleeve and operating mandrel are activated by either an increase or decrease in annulus pressure.

Abstract: A hydraulic set packer for use in a well bore as part of a testing apparatus. The packer comprises a housing defining a generally annular piston chamber therein. A cylindrical portion of an annular piston is slidably disposed in the piston chamber. The piston also has a shoe portion adjacent to a packer element on the housing. An inner mandrel is disposed in the housing, and the housing and inner mandrel define a passageway therein such that fluid pressure may be applied to the piston for moving it against the packer element such that the packer is set in sealing engagement with the well bore. The passageway extends the full length of the housing so that it may be in communication with another hydraulic packer positioned therebelow. One or more packers may be used in a downhole tool on a testing string for use in testing a well formation. The packer may also be used on a tubing string for testing a blowout preventer.

Abstract: A downhole electrical power supply apparatus has a high fluid pressure source zone and a low fluid pressure discharge zone each defined at least partially within the apparatus. A fluid powered engine provides rotational mechanical output and is powered by fluid flowing from the source zone through the engine to the discharge zone. An electrical powered generator converts the rotational mechanical output of the engine into electrical output.

Abstract: A downhole tool includes a hydraulic power supply containing a volume of compressed gas. The hydraulic power supply can be recharged while the tool is located downhole in the well by recompressing the gas in the power supply chamber.

Abstract: An aquatic animal trap is provided, comprising a center enclosed cell having a bottom and mesh sides having at least one entrance passageway formed therein; and at least three radially spaced outer enclosed cells, each of the outer cells having a bottom and mesh sides having at least one entrance passageway formed therein and connected to the center cell via a radial passageway.

Abstract: A controllable dual weak point device for insertion in a wireline between the cable and tool. The device consists of upper and lower sections that are slidably joined together in releasable interlocking manner with the upper section secured to the cable and the lower section secured to the tool. The upper and lower sections are joined together by a concentric arrangement of central tube, mandrel and limiting sleeve which are interconnected by first and second springs and first and second shear pin arrangements, i.e., the respective first and second weak points.

Abstract: A downhole tool apparatus includes an operating mechanism and a hydraulic timer. The hydraulic timer is operably associated with the operating mechanism for providing a time delay prior to operation of the operating mechanism. The hydraulic timer includes a fluid flow restriction and a spring biased piston which pushes a predetermined volume of hydraulic fluid through the fluid flow restriction.

Abstract: A tool and method for use with a drill string or the like in capturing an object in a cavity, such as subterranean borehole, include a mandrel, object engaging apparatus for latching the mandrel to the object as the tool is moved into the borehole, and string engaging apparatus for keeping the mandrel latched to the drill string as the mandrel is moved into the borehole and for unlatching the mandrel from the drill string when the drill string is rotated in a first direction with the mandrel latched to the object. A washover pipe and mill, which are connected to the drill string, may be moved into contact with the object after the mandrel is unlatched from the drill string for milling through the object. A ratchet allows the mill to move toward the object relative to the mandrel and prevents the mill from moving away from the object relative to the mandrel. The ratchet allows the mill to move away from the object when the drill string is rotated in the first direction and lifted relative to the mandrel.

Abstract: A burner nozzle for petroleum products. The burner nozzle comprises a housing portion with a nozzle assembly disposed therein. In the nozzle assembly are an outer disc and an inner disc disposed in the outer disc. Helical ramps on the outer and inner discs define gaps or fluid flow orifices therebetween. A spring biases the ramp on the inner disc toward the ramp on the outer disc. Fluid pressure in the tube portion forces the ramps apart to increase the orifice size to maintain a relatively high fluid flow velocity through a wide flow rate range. Fluid is discharged from the orifices in a spiraling pattern and impinges a conical inner surface of a swirl chamber from which the fluid is discharged from the burner nozzle.

Abstract: A well fluid sampling apparatus provides a time delay after actuation of the tool and before a sample is taken. The tool is operated by well pressure acting on a piston. The piston is initially hydraulically blocked so that it cannot move. The time delay is provided after the piston begins moving. Additional time delay devices can optionally be included.

Abstract: An annulus pressure responsive tool is temporarily deactivated so as to no longer be responsive to changes in well annulus pressure. The tool includes a tool housing with a power piston slidably disposed in the housing. A first pressure conducting passage in the housing communicates the well annulus to one side of the power piston. A reference pressure means is disposed in the housing for providing pressure to the second side of the power piston. Thus, a pressure differential is created across the power piston. Also, a selectively operable temporary deactivating means is provided so that the power piston is no longer responsive to changes in the well annulus pressure.