Abstract:
The invention is directed to a turbine with a housing mountable in a drill string and having an inlet opening and an outlet opening for a fluid conveyed through the drill string, and with an impeller arranged in the housing and adapted to be impinged upon by the fluid flowing into the housing, wherein the impeller is axially movably mounted and yieldably supported against the afflux direction in such a way that the supporting force of the yielding support increases as the axial movement of the impeller increases. To reduce the dependence of the turbine rotational frequency and turbine performance on the feed rate and to avoid overloading of the generator, the housing includes in the range of movement of the impeller a frontal first housing section of smaller inner diameter as seen in the afflux direction and a rear second housing section of larger inner diameter as seen in the afflux direction.
Abstract:
The invention is directed to a device for the generation of pressure pulses, being intended for transmitting signals, in a fluid-carrying channel (2), using a pulser (1) designed to be integrated in the channel (2) and having a housing (4) and an adjustable throttling device by means of which the flow resistance can be varied at at least one point of the channel (2), an electrical generator (16), an impeller (9) exposed to the fluid passing through the channel and designed to drive the generator (16), a control device by means of which the load of the generator (16) can be varied in response to control signals, and an actuating device that is connected to the throttling element (12) and effects an adjustment of the throttling element responsively to the driving torque of the generator (16).The impeller (9) is axially movably mounted and yieldingly supported against the direction of fluid flow such that the supporting force of the yielding support (21) increases as the axial movement of the impeller (9) increases, and the throttling device includes an axially adjustable throttling element (12) that is coupled to the impeller (9) in such a way that the throttling element (12) is adjusted in the sense of increasing the throttling effect by an axial movement of the impeller in the direction of fluid flow.
Abstract:
In a borehole logging apparatus (1) for deep well drillings having a device for transmitting measured data obtained while drilling from a borehole through the drilling fluid to the earth's surface, there is arranged in the upper end of a housing (2) a signal transmitter (13) comprising a beaker-shaped rotor (24) and a stator sleeve (25) surrounding said rotor. Fluid impinges on the signal transmitter (13) through a central feed pipe (15) surrounded by an exchangeable bypass ring (14) to which the complete current of drilling fluid is routed through a filter pipe (3) and through which part of the drilling fluid current is routed back into the drill string (6). From a set of bypass rings (14) of different bypass cross sections it is possible to select one suited for the particular on-site conditions and insert it into the logging apparatus (1) in order to obtain a significant signal through the signal transmitter (13).
Abstract:
A hydromechanical signal transmitter for generating pressure pulses in a drilling fluid to transmit telemetry information of a well-logging operation includes a stator fixed in a cylindrical housing having at least a pair of axially aligned fluid passages, and a disc shaped rotor disposed between the passages, rotatable between a first limit position wherein an opening in the rotor passes drilling fluid flowing through the pair of passages and a second limit position wherein a disc portion of the rotor throttles the flow of the fluid. A revisable d.c. motor drives the rotor from one limit position to the other in response to information signals provided to the motor. Means is provided to stop the rotor at each limit position, including radial stop faces on a drive shaft connecting the motor to the rotor and a stop pin in the housing. A plurality of circumferentially spaced passages and rotor openings may be provided.
Abstract:
An improved housing assembly for an underwater camera with a flash device is disclosed and includes a hollow cylindrical pressure housing. The hollow cylindrical pressure housing has a shell or wall including a window for the objective of the camera and has a pressure tight head, made of transparent material, in which the flash device is disposed.
Abstract:
The invention is directed to a borehole logging apparatus for deep well drilling, with a signal transmitter for transmitting measured data obtained while drilling from a borehole through the drilling fluid to the earth's surface, and with an elongated housing which is adapted for insertion in the drilling fluid conduit of a drill string. Accommodated in the housing is a flow regulator with a control piston, which controls the cross-section of opening of a bypass opening in response to the pressure differential generated by a flow restrictor and in response to the force of a spring in such manner that the part of the drilling fluid current fed to the signal transmitter through the flow restrictor is maintained substantially constant, and the remaining excess drilling fluid current is routed to the drilling fluid conduit via the bypass opening.
Abstract:
A device for detecting fluorescence on the surface of the earth is disclosed. The device includes a laser installed in a vehicle, means for irradiating an essentially linear surface area in front of and transverse to the vehicle, a directing device for directing the spread beam downward to illuminate the earth's surface and means for detecting fluorescence on the illuminated surface. The inventive device permits the rapid and effective exploration of a relatively large area without gaps of the earth's surface for fluorescent substances.
Abstract:
An apparatus for charging an electrical energy source secured within a water-tight or hermetically sealed housing. The apparatus includes a transformer having a primary and secondary coil. The secondary coil is secured within the housing, whereby the housing need not be opened to effect charging of the electrical energy source.