Abstract: Concentric control lines have an outer line disposed about one or more inner lines. Encapsulated together, the lines only require one penetration through the wellhead to extend downhole. At the wellhead, the lines communicate with an operating system, which can provide hydraulics, electric power, signals, or the like for downhole components. Beyond the wellhead, the concentric lines extend along the tubing to a manifold. The outer line sealably terminates at the manifold's inlet, while the inner conduit passes out an outlet with a sealed fitting to connect to a downhole component. A downhole line couples to an outlet of the manifold and communicates internally with the outer conduit terminated at the manifold's inlet. This downhole line can then extend to the same downhole component or some different component.

Abstract: Concentric control lines have an outer line disposed about one or more inner lines. Encapsulated together, the lines only require one penetration through the wellhead to extend downhole. At the wellhead, the lines communicate with an operating system, which can provide hydraulics, electric power, signals, or the like for downhole components. Beyond the wellhead, the concentric lines extend along the tubing to a manifold. The outer line sealably terminates at the manifold's inlet, while the inner conduit passes out an outlet with a sealed fitting to connect to a downhole component. A downhole line couples to an outlet of the manifold and communicates internally with the outer conduit terminated at the manifold's inlet. This downhole line can then extend to the same downhole component or some different component.

Abstract: A seal for use in temperature and pressure extremes is disclosed. It features springs internal to the sealing members and the ability to seal against pressure differentials from opposed directions. A spacer ring prevents contact from oppositely oriented seal components and at the same time prevents spring and seal collapse under extreme loading conditions. The seal assembly is self-centering in a downhole seal bore and can be used on tools delivered on wireline, where the insertion forces available are at a minimum. The seal can withstand pressure differentials in excess of 13,500 PSI and temperatures above 350 degrees Fahrenheit.

Abstract: Various techniques for holding open an SSSV using expansion technology are disclosed. A sleeve is delivered to the SSSV and expanded mechanically or hydraulically to deposit the deformed sleeve in position over a flapper or against a flow tube holding the flapper in the open position.

Abstract: A seal for use in temperature and pressure extremes is disclosed. It features springs internal to the sealing members and the ability to seal against pressure differentials from opposed directions. A spacer ring prevents contact from oppositely oriented seal components and at the same time prevents spring and seal collapse under extreme loading conditions. The seal assembly is self-centering in a downhole seal bore and can be used on tools delivered on wireline, where the insertion forces available are at a minimum. The seal can withstand pressure differentials in excess of 13,500 PSI and temperatures above 350 degrees Fahrenheit.

Abstract: Various techniques for holding open an SSSV using expansion technology are disclosed. A sleeve is delivered to the SSSV and expanded mechanically or hydraulically to deposit the deformed sleeve in position over a flapper or against a flow tube holding the flapper in the open position.

Abstract: A terminal board for a dynamoelectric machine is mounted to an end-shield of the machine. The terminal board has securing means for fixing an electrical switch to the terminal board using a single conventional fastener. A second snap-in arrangement is provided in place of additional fastener. The terminal board includes an arm spaced from the fastener hole. The arm is spaced above a surface of the terminal board and defines a slit with the terminal board through which an ear of the switch extends. A finger extends down from a free end of the arm to define a stop which maintains the switch ear in the slot. The finger and the single fastener together fix the switch to the terminal board.

Abstract: A rotating machine having a rotor comprising a flexible shaft with a plurality of masses distributed along the shaft. Included within these masses are magnetic disks. Magnetic bearings are attached to the housing and coact to support the rotor in only a radial direction or in both radial and axial directions. Bearing sensors are used to measure the shaft position local to each bearing relative to a face of each bearing. Variable magnetic bearing parameters are controlled so as to change values of stiffness and damping of the magnetic bearings in response to the measurements from the bearing sensors. These controls can be direct analog circuitry, or digital components, or a combination of digital and analog components.

Abstract: A magnetic bearing system includes a rotor with a plurality of masses distributed along the shaft including a portion having a circular peripheral surface suspended radially from pole pieces of permanent and electromagnets. A fault tolerant adaptive system responds to detected parameters of the rotor for varying the stiffness and damping the rotor. Position and speed of rotor are sampled at a rapid rate for each of a plurality of control axes and are processed independently during each sampling period. Malfunction of any of the processors causes supervisory controller to reconfigure the processing of the samples.

Abstract: A tandem safety valve for use in a tubing string in a wellbore has a pair of identical valves disposed in a valve housing. Each valve has a flow tube for selectively opening and closing each valve. Each valve is provided with an hydraulic normal-operation actuator and an hydraulic looking actuator. The normal-operation actuator and locking actuator are selectively engaged with the flow tube disposed within the valve housing. Each flow tube is provided with a latch to releasably engage the normal-operation actuator, and a a locking dog to selectively engage the flow tube in a locked-open position. The locking actuator engages the latch to release the normal-operation actuator from engagement with the latch and to permit the locking dog to engage the valve housing to maintain the flow tube and valve in a locked-open position.

Abstract: A downhole well tool is provided which includes a shifting sleeve for opening a flow communication port. The well tool includes first and second primary seal elements positioned upstream and downstream, respectively, of the port as well as upstream and downstream of the threaded connections between the well tool and sections of tubing forming the well flow conduit. A fluid diffuser element may be included to abate flow damage across the primary seal elements during the shifting of the sleeve. A method of selectively transmitting fluid incorporating said well tool also is disclosed.

Abstract: A dust proof electric switch is provided for use in a dynamoelectric machine employing a centrifugal acuator having a terminal board with a cup formed therein in which a fixed contact point and terminal are mounted. A pivotable switch arm having a contact point attached thereto is mounted to the arm and extends above and cantilevered across the terminal board so that pressure on the switch arm from the centrifugal acuator causes the contact points to touch thereby closing the circuit. An open ended, resilient, flexible boot is affixed to the cup and extends upward between the terminal board to snuggly abut the switch arm and completely enclose the contact points when they are touching and when they are apart thereby protecting the contact area from dust and debris as well as containing sparks within the boot. The terminal board contains stops which serve to maintain alignment of the switch arm.

Abstract: Provision of a digital controller in which the controller controls the bearing coil current by means of a switching bridge that periodically reverses the applied voltage to the coil. The controller selects an applied voltage from a plurality of discrete voltage sources. When a rapid change in the load current is required, a relatively large magnitude of applied voltage is used. When a relatively constant magnitude of average load current is required, a relatively smaller value of voltage is applied.

Abstract: A downhole well tool is provided which includes a shifting sleeve for opening a flow communication port. The well tool includes first and second primary seal elements positioned upstream and downstream, respectively, of the port as well as upstream and downstream of the threaded connections between the well tool and sections of tubing forming the well flow conduit. A fluid diffuser element may be included to abate flow damage across the primary seal elements during the shifting of the sleeve. A method of selectively transmitting fluid incorporating said well tool also is disclosed.

Abstract: A dynamoelectric machine (M) has a terminal board (T) on which electrical connections are made by attaching various electrical elements (1, 5) together so, that an electrical connection is made between them. A fastener 13 is used to physically make the attachment. A spacer (25) fits on and is compressed about the fastener to permanently attach the elements and insure that electrical integrity between them is maintained. The elements cannot be subsequently loosened by connection and disconnection of other elements to the board, or by an element rotating relative to the fastener.

Abstract: A dynamoelectric machine (10) has no external leads. A stator assembly (12) includes at least one set (14) of electrical windings (16) terminable at each end. A rotor assembly (18) includes a rotatable shaft (22) and the stator and rotor assemblies are installed in a housing (24). A terminal block (38) is internal of the housing and the ends of the winding set are terminated in this block. The housing has an opening (114) therein through which the termination unit is accessible. A receptacle (102) to which external electrical wires (W1, W2) are connected is matingly connectable to the material block through the opening to connect the machine to the external electrical wires.

Abstract: A motor base clamp for clamping motors or the like to a supporting base is disclosed. The motor base clamp includes a pair of mirror image elongated clamping elements attached at one end to the supporting base and configured to surround the motor or the like. The free ends of the clamping elements are associated with a fastener that secures and tightens the clamping elements together in the vicinity of the free ends of the elements so as to clamp a motor or the like to the supporting base. At least one of the fastener or the free ends of the clamping elements are configured to equally distribute the load of the fastener to the free ends of the clamping elements when secured and tightened together.

Abstract: A switch assembly for selectively engaging and disengaging contacts connected to electrical machinery such as the windings for an electric motor including a pair of conductive members having insulated base portions and flexible cantilevered portions extending outwardly therefrom, each carrying one of a pair of spaced opposed electrical contacts, with one cantilevered portion of the conductive members being shorter and stiffer than the other to enhance rolling wipe-action of the pair of contacts when engaged.

Abstract: A switch assembly for use with a centrifugal actuator in the start winding circuit of a dynamoelectric machine (1). The switch has a pair of electrical contacts (29, 33) contained in a pliable, bellows-like enclosure (37) for protection from foreign matter. The assembly includes a terminal board (19) having an electrically conductive post (28) mounted thereon and comprising one side of the switch. A second contact, comprising the other side of the switch, is directly above the first and is surrounded by an electrically conductive cap (32). The cap is affixed between the ends of an electrically conductive, cantilevered switch arm (16) which is biased against a vertically rigid, horizontally adjustable stop (45). The stop has one end rigidly mounted to the terminal board and its other end above and in contact with the switch arm where the cap is affixed to the arm. The bias is caused by the switch arm support structure at the fixed end being attached to the terminal board at an angle.

Abstract: A unit bearing motor typically has an end shield, a stator core mounted within the end shield with the core extending axially out beyond the end shield. The core receives the windings of the motor and a winding cover is secured to the portion of the core extending out beyond the end shield so as to at least in part enclose the stator and the windings. The cover is a unitary member formed of sheet metal and has a peripheral rim at the end of the cover adjacent the end shield. The side walls of the cover have a plurality of indentations or dimples formed therein which locally engage the portion of the core extending beyond the endshield so as to securely hold the cover with respect to the core, but yet so as to permit the ready removal of the cover without damage to the cover or the windings.