Cemented open hole selective fracing system,Compact Winding Mechanism for Crossbow,Cemented Open Hole Selective Fracing System,Crossover tree system,Amplitude controlled orifice valving

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1779 results about "Spool valve" patented technology

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Cemented open hole selective fracing system

InactiveUS7267172B2ConstructionsFluid removalSpool valveThermodynamics

A cemented open hole selective fracing system is shown. In the producing zone, an open hole is drilled therein and a production tubing is cemented in place. At preselected locations along the production tubing, the production tubing will have sliding valves located there along. The sliding valves may be selectively opened by a shifting tool, and the cement around the sliding valve dissolved. Thereafter, the formation may be fraced immediately adjacent the opened sliding valve. By selectively opening different combinations of sliding valves, fracing can occur in stages with more fracing pressure and more fracing fluid being delivered deeper into the formation. Just as the sliding valves can be selectively opened with a switching tool, the sliding valves can also be selectively closed to protect the production of the well.

$Cemented open hole selective fracing system$

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Owner:PEAK COMPLETIONS TECH INC

Compact Winding Mechanism for Crossbow

InactiveUS20100170488A1Enhance force/draw characteristicPermit rotationWeapon assembly/disassemblyFiring/trigger mechanismsSpool valveEngineering

A crossbow includes an elongated frame coupled to a riser at a first end thereof and attached to an upper housing at its second end generally above the trigger region. The riser supports a pair of flexible limbs, and a bowstring extends between such limbs. A bowstring retractor is provided within the upper housing and includes a rope spool used to wind a retractor rope for retracting the bowstring. First and second spool gears surround the rope spool for rotation therewith. A spur gear mounted on a drive axle engages one of the spool gears, and a crank can be engaged with the drive axle. A pawl engages the other spool gear to prevent unintentional unwinding of the retractor rope from the rope spool. A pawl release member disengages the pawl from its associated spool gear. Drawing the bowstring beyond its full draw position also disengages the pawl.

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Owner:PRECISION SHOOTING EQUIP

Cemented Open Hole Selective Fracing System

InactiveUS20080302538A1ConstructionsFluid removalSpool valveClassical mechanics

A cemented open hole selective fracing system and method are shown. In the producing zone, an open hole is drilled therein and a production tubing is cemented in place. At preselected locations along the production tubing, the production tubing will have sliding valves located there along. The sliding valves may be selectively opened, and the cement around the sliding valve dissolved. Thereafter, the formation may be fraced immediately adjacent the opened sliding valve. By selectively opening different combinations of sliding valves, fracing can occur in stages with more fracing pressure and more fracing fluid being delivered deeper into the formation. Just as the sliding valves can be selectively opened, the sliding valves can also be selectively closed to protect the production of the well.

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Owner:PEAK COMPLETION TECH

Crossover tree system

InactiveUS6675900B2Drilling rodsFluid removalTubing hangerSpool valve

A subterranean oil or gas well apparatus is provided. The apparatus includes a single-bore production tubing hanger arranged concentric with a wellhead. The tubing hanger includes a plurality of ports and channels arranged about the tubing hanger to give operators access to the production tubing annulus and provide chemical injection capability. The ports are closable by a sliding valve. The apparatus also includes annulus and production radial-bore stab assemblies between a christmas tree and an internal crossover assembly. The stab assemblies are extendable and retractable between the chirstmas tree and the crossover assembly to allow the retrieval and installation of each independently.

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Owner:AKER SOLUTIONS AS

Amplitude controlled orifice valving

ActiveUS20060081431A1Firm dampingSoft dampingSpringsShock absorbersSpool valveAmplitude control

A dual tube shock absorber includes a spool valve located between the upper working chamber and the reserve chamber. The spool valve moves with the piston rod to open and close a flow path between the upper working chamber and the reserve chamber. This provides a low damping characteristic for small movements of the piston rod which changes to a high damping characteristic for larger movement of the piston rod.

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Owner:TENNECO AUTOMOTIVE OPERATING CO INC

Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve

InactiveUS7487707B2Servomotor componentsServomotorsSpool valveBlocked valves

A hydraulic circuit controls flow of fluid between first and second ports of a hydraulic actuator, such as a cylinder / piston arrangement and each of a supply conduit and a tank return conduit. The hydraulic circuit operates in standard powered operating modes as well as powered and unpowered regeneration modes. In a powered operating mode, a conventional pressure compensated spool valve determines the velocity of the hydraulic actuator. A workport blocking valve connects one workport of the spool valve to the first port and the other workport is connected to the second port. A regeneration shunt valve is directly connected between the first and second ports of the hydraulic actuator. In a regeneration operating mode or a mix of powered and regeneration modes, a combination of the spool valve, the workport blocking valve, and the regeneration shunt valve determines the velocity of the hydraulic actuator.

Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve

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Owner:HUSCO INT INC

Valve timing control apparatus

InactiveUS20090133652A1Yielding couplingCouplings for rigid shaftsSpool valveWorking fluid

A valve timing control apparatus for controlling valve timing includes a first rotor, a second rotor, and a controller. The second rotor and the first rotor defines therebetween an advance chamber and a retard chamber. The controller includes a supply passage, at least one drain passage, a spool valve, at least one connection passage, and at least one check valve. The at least one connection passage connects the supply passage to the at least one drain passage when a spool of the spool valve is moved to one of the advance and retard positions. The at least one check valve is respectively provided in the at least one connection passage. The check valve allows working fluid to flow in a direction from the at least one drain passage toward the supply passage and limits working fluid from flowing in an opposite direction.

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Owner:DENSO CORP

Cemented open hole selective fracing system

InactiveUS7926571B2ConstructionsFluid removalEngineeringProduction tubing

$Cemented open hole selective fracing system$

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Owner:PEAK COMPLETION TECH

Magnetically sequenced pneumatic motor

ActiveUS20080253906A1Servomotor componentsRotary clutchesSpool valvePneumatic motor

A pneumatic motor having a piston and a magnetically actuated valve. The magnetically actuated valve may be adjacent the piston and, in some embodiments, include a spool valve.

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Owner:CARLISLE FLUID TECH INC

Gas turbine engine with transmission

ActiveUS20140290265A1Gas turbine plantsJet propulsion plantsSpool valveElectric power transmission

A multi spool gas turbine engine with a differential having a selectively rotatable member which rotational speed determines a variable ratio between rotational speeds of driven and driving members of the differential. The driven member is engaged to the first spool and a rotatable shaft independent of the other spools (e.g. connected to a compressor rotor) is engaged to the driving member. First and second power transfer devices are engaged to the first spool and the selectively rotatable member, respectively. A circuit interconnects the power transfer devices and allows a power transfer therebetween, and a control unit controls the power being transferred between the power transfer devices. Power can thus be transferred between the first spool and the selectively rotatable member to change the speed ratio between the first spool and the rotatable shaft.

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Owner:PRATT & WHITNEY CANADA CORP

CTA phaser with proportional oil pressure for actuation at engine condition with low cam torsionals

ActiveUS20060086332A1Valve drivesMachines/enginesSpool valveInternal combustion engine

A variable camshaft timing phaser for an internal combustion engine having at least one camshaft comprising a plurality of vanes in chambers defined by a housing and a spool valve. The vanes define an advance and a retard chamber. At least one of the vanes is cam torque actuated (CTA) and at least one of the other vanes is oil pressure actuated (OPA). The spool valve is coupled to the advance and retard chamber defined by the CTA vane and the advance chamber defined by the OPA vane. When the phaser is in the advance position, fluid is routed from the retard chamber defined by the OPA vane to the retard chamber defined the CTA vane. When the phaser is in the retard position, fluid is routed from the retard chamber defined by the CTA vane to the advance chamber defined by the CTA vane.

CTA phaser with proportional oil pressure for actuation at engine condition with low cam torsionals

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Owner:BORGWARNER INC

Pressure balanced spool poppet valves with printed actuator coils

InactiveUS20070113906A1Operating means/releasing devices for valvesServomotor componentsSpool valveEngineering

Pressure balanced spool poppet valves with printed actuator coils minimize valve leakage and facilitate efficient manufacturing and reliable operation. The spool poppet valves may be configured like a conventional spool valve, but further include a poppet valve at one end of the spool to proved much better sealing when the poppet valve is closed. Various features are disclosed, including pressure balancing for high pressure operation. The printed actuator coils for the spool poppet valves are formed by the interconnection of conductive coils on each of multiple layers of a multiple layer printed circuit board, which circuit board may have a hole there through for accommodation of mechanical and / or magnet requirements, and may include similar printed actuator coils for one or more additional spool poppet valves as well as electronic devices associated with the operation thereof. The spool poppet valves may be advantageously constructed without printed actuator coils, and the printed actuator coils may be advantageously used in actuators of other designs.

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Owner:STURMAN DIGITAL SYST

Electrically sequenced tractor

InactiveUS6938708B2Rapid responseDrilling rodsReciprocating drilling machinesSpool valveControl signal

A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assembly. The packerfeet and propulsion cylinders are slidably engaged with the tractor body. Drilling fluid can be delivered to the packerfeet to cause the packerfeet to grip onto the borehole wall. Drilling fluid can be delivered to the propulsion cylinders to selectively provide downhole or uphole hydraulic thrust to the tractor body. The tractor receives drilling fluid from a drill string extending to the surface. A system of spool valves in the control assembly controls the distribution of drilling fluid to the packerfeet and cylinders. The valve positions are controlled by motors. A programmable electronic logic component on the tractor receives control signals from the surface and feedback signals from various sensors on the tool. The feedback signals may include pressure, position, and load signals. The logic component also generates and transmits command signals to the motors, to electronically sequence the valves. Advantageously, the logic component operates according to a control algorithm for intelligently sequencing the valves to control the speed, thrust, and direction of the tractor.