| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 166325000 | One way, e.g., check valve type | 15 |
| 20090008098 | METHOD AND APPARATUS FOR CATCHING A PUMP-DOWN PLUG OR BALL - An improved method and apparatus for catching and holding a ball, plug or dart during oil and gas well operations (e.g., cementing operations) employs a specially configured tool body that accepts a ball or a plug or a dart that flows downwardly into the tool body but disallows escape or discharge of the ball, plug or dart upwardly. The tool body has first and second flow channels or passages, one being generally axially aligned with the tool body. The other flow channel or passage is a second channel or passage that enables fluid flow around a cavity that contains one or more captive plugs (or ball or dart(s)). | 01-08-2009 |
| 20090032261 | Valve - A downhole valve comprises a tubular body and a valve member. The valve member is normally closed and in the closed position may prevent or restrict passage of a working fluid through the body. The valve member is movable to an open position, a first working fluid pressure differential being necessary to move the valve member from the closed position and a lower second working fluid pressure differential being necessary to maintain the valve member in the open position. | 02-05-2009 |
| 20100051284 | Valve trigger for downhole tools - An actuator device for setting a downhole tool comprises a piston disposed in an upper reservoir of the device, the piston comprising two actuation areas upon which pressure acts to move the piston. The upper reservoir is in fluid communication with a lower reservoir through a valve that initially restricts the flow of fluid from the first reservoir to the second reservoir. In setting a downhole tool, fluid pressure initially acts on the first actuation area to slowly move the piston toward a set position. After a predetermined length of movement of the piston, the second actuation area is placed in fluid communication with a pressure such that the valve no longer restricts the flow of fluid through the valve, i.e., the total pressure acting on the piston is increased. This increased pressure rapidly moves the piston to actuate, or set, the downhole tool. | 03-04-2010 |
| 20100116503 | DUAL CHECK VALVE - A check valve comprising a section of a drill string, a flapper valve positioned within and concentric to the section of the drill string, and a piston valve positioned within and concentric to the section of the drill string. The flapper valve allows fluid flow in a first direction through an inner portion of a cross-section of the section of the drill string and not allowing fluid flow in a second direction, and the piston check valve allowing fluid flow in the first direction through an outer portion of the cross-section of the section of the drill string and not allowing fluid flow in the second direction, where the first portion and the second portion of the cross-section of the section of the drill string are mutually exclusive. | 05-13-2010 |
| 20100319924 | COMPLIANT DART-STYLE REVERSE-FLOW CHECK VALVE - An apparatus usable with a well includes a gas lift valve having a check valve arrangement located between an annulus and a passageway of a tubing. The check valve arrangement is adapted to selectively allow fluid flow from the check valve arrangement from an inlet side of the check valve arrangement to an outlet side of the check valve arrangement, and is biased to prevent a leakage flow through the check valve arrangement from the outlet side to the inlet side. The check valve arrangement is defined by a valve element movable into and out of engagement with a valve seat wherein one of the valve element and the valve seat has a first sealing structure engageable with a second sealing structure on the other of the valve element and the valve seat. At least one of the first and second sealing surfaces include at least one pair of sealing members. | 12-23-2010 |
| 20110030964 | Control Module With Dual Ball Valve Assemblies - A subsea control system may have a control module having a plurality of dual ball valve assemblies. Each dual ball valve assembly may be connected to a supply line, a vent line, and a function line connected to a subsea device for controlling the subsea device. | 02-10-2011 |
| 20110168398 | Injection, Sealing Valving and Passageway System - The invention provides an injection, sealing, valving and passageway system for use with hollow rock bolts and hollow injection bars used in mining, civil engineering, tunneling and construction including use with hollow self drilling rock bolts. The invention comprises a plurality of passageways with one or more one way flow valves along the passageways. The invention enables one or more fluids to be pumped into a hollow rock bolt or other hollow elongate member either sequentially or simultaneously without cross contamination of fluids in another passageway or back flow of fluids along the wrong passageway. The invention is typically used to install self drilling rock bolts whereby a drilling fluid is initially pumped through the hollow bolt during the drilling cycle, and then a two part chemical resin or cement grout is pumped through the hollow bolt to anchor the bolt in the borehole. | 07-14-2011 |
| 20120043088 | METHOD AND APPARATUS FOR SEPARATING DOWNHOLE HYDROCARBONS FROM WATER - The invention provides a method and apparatus for the downhole separation of a gas/oil/water fluid mixture and the injection of the separated water component into the formation containing the borehole. The fluid mixture is delivered into the wellbore through perforations in a casing at a production zone and delivered through check valves in a tubing string into an annulus between the casing and the tubing string. Hydrocarbons are returned to the production tubing and flow to the surface under formation or pump pressure and water is discharged from the annulus into an injection level isolated from the production zone. | 02-23-2012 |
| 20140034326 | Compliant Dart-Style Reverse-Flow Check Valve - An apparatus usable with a well includes a gas lift valve having a check valve arrangement located between an annulus and a passageway of a tubing. The check valve arrangement is adapted to selectively allow fluid flow from the check valve arrangement from an inlet side of the check valve arrangement to an outlet side of the check valve arrangement, and is biased to prevent a leakage flow through the check valve arrangement from the outlet side to the inlet side. The check valve arrangement is defined by a valve element movable into and out of engagement with a valve seat wherein one of the valve element and the valve seat has a first sealing structure engageable with a second sealing structure on the other of the valve element and the valve seat. At least one of the first and second sealing surfaces include at least one pair of sealing members. | 02-06-2014 |
| 20140174750 | Liquid Valve for Flow Control Devices - Certain aspects of the present invention are directed to a liquid valve assembly that can be disposed in a wellbore through a fluid-producing formation. The liquid valve assembly can include a housing and a liquid valve. The housing can define an inner chamber and an opening adapted to allow fluid to flow between the inner chamber and a passageway. The liquid valve can be disposed in the inner chamber. The liquid valve can include a yield stress fluid. The yield stress fluid can prevent fluid from flowing between the inner chamber and the passageway. | 06-26-2014 |
| 20150047851 | Compliant Dart-Style Reverse-Flow Check Valve - An apparatus usable with a well includes a gas lift valve having a check valve arrangement located between an annulus and a passageway of a tubing. The check valve arrangement is adapted to selectively allow fluid flow from the check valve arrangement from an inlet side of the check valve arrangement to an outlet side of the check valve arrangement, and is biased to prevent a leakage flow through the check valve arrangement from the outlet side to the inlet side. The check valve arrangement is defined by a valve element movable into and out of engagement with a valve seat wherein one of the valve element and the valve seat has a first sealing structure engageable with a second sealing structure on the other of the valve element and the valve seat. At least one of the first and second sealing surfaces include at least one pair of sealing members. | 02-19-2015 |
| 166326000 | Flexible valve element | 3 |
| 20110036586 | Self Aligning Mud Saver Valve Seat - A mud saver valve is constructed so that the valve seats self align preventing the loss of fluid when the valve is in the closed position. One or both seats can skew their longitudinal axes to get the alignment. | 02-17-2011 |
| 20110067879 | Bellows Valve - The present invention relates to a valve device which is employed in connection with oil and gas wells with the object of increasing the well's production. The valve device comprises an external housing ( | 03-24-2011 |
| 20120125621 | Bellows valve - The present invention relates to a device which can be used in an off-shore or onshore oil and/or gas well for the purpose of increasing the production of the well. The device comprises an outer structure in which a first and a second pressure-actuated bellows device are arranged, the first and second pressure-actuated bellows device, via a support means, being in fluid communication with each other. The support means is fixedly mounted internally in the outer structure, the support means thereby delimiting an open and a closed space for respectively the first and the second pressure-actuated bellows device, wherein the closed space is filled with a fluid under pressure, whilst the open space is in fluid communication with a surrounding fluid. | 05-24-2012 |
| 166327000 | Shoes with check valve | 1 |
| 166328000 | Loose ball closure | 1 |
| 20090308614 | Coated extrudable ball seats - Ball seats comprising at least one sealing material facilitate restricting fluid flow through the ball seat when a plug, such as a ball, is landed on the seat. The plug is forced into the sealing material causing the sealing material to be deformed and to at least partially deform to a shape reciprocal to the shape of the plug, thereby reducing leakage around the plug and through the seat. In one particular embodiment, the ball seat is an extrudable ball seat. Suitable sealing materials include polymers and elastomers. | 12-17-2009 |
