Preussag Aktiengesellschaft

Weatherford Energy Services Gmbh

Precision Drilling Technology Services Gmbh

Preussag Aktiengesellschaft Metall

Preussag Aktiengellschaft

Helmut Winnacker

Uwe Draeger

Klaus Janssen

Friedhart Knolle

Hans-Juergen Hoelscher

Heribert Broicher

Klaus Johnen

Thomas Kerk

Erich Kirsch

Uwe Dräger

Wilfried Tuennermann

Jurgen Dierssen

Arthur Zydek

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.

Turbine for driving a generator in a drill string

A bearing arrangement for a turbine rotor of a turbine is adapted to be mounted in a drill string and to be driven by the flow of drilling fluid. The bearing arrangement includes a turbine chamber surrounding the turbine rotor and having an inflow and an outflow, a stator on which the turbine rotor is rotatably mounted, and a cavity formed between the turbine rotor and the stator and accommodating at least one radial plain bearing and being separated from the turbine chamber by an axial plain bearing constructed as a bearing ring seal and by a conveyor screw which is disposed on the turbine rotor and operates to convey from the cavity to the turbine chamber.

Bearing arrangement for a turbine rotor of a drill string turbine

The invention is directed to a turbine () for generating power in a drill string (), including a turbine rotor () drivable by a fluid and a bypass device having a first bypass channel bypassing the turbine rotor (). For varying the volumetric flow through the bypass channel, provision is made for a valve () and a control device driven by the fluid and having a drive element () by means of which the valve () is movable anywhere between a first and a second position. The drive element () produces a flow resistance in the fluid flow path downstream from the turbine rotor () and downstream from the valve () and in the flow direction takes support upon a spring ().

Turbine for power generation in a drill string

A controllable pressure reducing valve has a housing which includes an inner chamber extending in the direction of a longitudinal axis and an inlet opening and an outlet opening. The inlet opening and the outlet opening open into the inner chamber at an axial relative distance. The inner chamber includes between the mouths of the inlet opening and the outlet opening at least one annular wall having a cylindrical valve bore. An axially movable valve body which is arranged in the inner chamber, extends through the valve bore and has a piston-type portion guided in the valve bore and adapted to close the valve bore. The piston-type portion includes at least one control recess bounded by a control step which extends in axial direction and in circumferential direction and combines with an edge of the valve bore to form a controllable valve opening.

Controllable pressure-reducing valve and device for the generation of pressure change signals

The invention is directed to a device for the generation of pressure pulses, being intended for transmitting signals, in a fluid-carrying channel (), using a pulser () designed to be integrated in the channel () and having a housing () and an adjustable throttling device by means of which the flow resistance can be varied at at least one point of the channel (), an electrical generator (), an impeller () exposed to the fluid passing through the channel and designed to drive the generator (), a control device by means of which the load of the generator () can be varied in response to control signals, and an actuating device that is connected to the throttling element () and effects an adjustment of the throttling element responsively to the driving torque of the generator (). The impeller () is axially movably mounted and yieldingly supported against the direction of fluid flow such that the supporting force of the yielding support () increases as the axial movement of the impeller () increases, and the throttling device includes an axially adjustable throttling element () that is coupled to the impeller () in such a way that the throttling element () is adjusted in the sense of increasing the throttling effect by an axial movement of the impeller in the direction of fluid flow.

Device for producing of electric energy and of signal transmitting pressure pulses

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.

Borehole logging apparatus for deep well drilling

In a borehole logging apparatus ( ) 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 ( ) a signal transmitter ( ) comprising a beaker-shaped rotor ( ) and a stator sleeve ( ) surrounding said rotor. Fluid impinges on the signal transmitter ( ) through a central feed pipe ( ) surrounded by an exchangeable bypass ring ( ) to which the complete current of drilling fluid is routed through a filter pipe ( ) and through which part of the drilling fluid current is routed back into the drill string ( ). From a set of bypass rings ( ) 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 ( ) in order to obtain a significant signal through the signal transmitter ( ).

Borehole logging apparatus for deep well drillings with a device for transmitting borehole measurement data

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.

Well bore data transmission apparatus

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.

Device for the detection of fluorescent substances on the surface of the

A cylindrical probe for insertion into a drill hole for detecting the presence of mineral deposits. A source of radioactive irradiation and a detector are mounted concentrically within the housing of the probe, the detector being shielded from direct radiation by a wall having an upper conical surface which directs fluorescent radiation reflected from the wall of the drill hole to the detector. A disc-shaped slot concentrates the rays from the radioactive source on an area of the drill hole wall which is in the shape of a ring surrounding the probe. The concentration and close proximity of the radiation source and the detector permit precise scanning and analyzing, simply, cheaply and quickly.

Probe for locating mineral deposits

An underwater camera for deep sea use having a cylindrical pressure-tight housing including a thickened cylindrical bead arranged eccentrically of the housing to define an area on one side of the housing which is thicker than the opposite side of the housing, and a window in the thicker area for exposing the film in the camera.

Deep sea underwater camera

An underwater camera in a pressure tight housing and a release mechanism for releasing the shutter at a predetermined distance from the sea bed. The release mechanism includes a transducer on the housing exterior for transmitting ultrasonic signals and receiving echo signals and an electronic circuit on the interior of the housing for opening the shutter in response to the echo signals when the camera has reached the predetermined distance from the sea bed.

Underwater camera

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.

Housing assembly for an underwater camera with a flash device

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.

Growing community of inventors

Burgdorf, Germany

Helmut Winnacker