| Patent application number | Description | Published |
|---|
| 20080245534 | Wellhead Assembly and Method - The invention provides a wellhead ( | 10-09-2008 |
| 20090044937 | Remote actuation of downhole tools using fluid pressure from surface - An apparatus for and a method of transmitting signals from the surface of a well to a location downhole in the well utilize a downhole fluid pressure sensor, a signal processing means located downhole in electrical connection with the pressure sensor and a downhole programmable logic unit capable of counting at least two signals received by the downhole pressure sensor. Typically, signals transmitted from the surface comprise a peak in pressure of downhole fluid located in production tubing run into a well bore and these signals are sensed by the downhole fluid pressure sensor. The logic unit outputs a signal to a tool to be actuated if it receives a number of signals within a particular time period, wherein the logic unit actuates the tool by the frequency of signals received rather than the amplitude of the signals received. | 02-19-2009 |
| 20090065214 | Apparatus for controlling a downhole device - Apparatus for controlling a downhole device such as a choke, the apparatus comprising a housing, a mandrel connected to the downhole device and moveable within the housing to move the device between different positions, and a detent mechanism to selectively lock the mandrel in one of the positions within the housing. The first and second positions are typically defined by physical stops on the apparatus such as shoulders, or dogs and grooves etc, and are typically placed at set positions that define the different configurations of the device. Thus, the movement of the downhole device is governed by the detent mechanism, rather than by variable factors such as pressure changes. | 03-12-2009 |
| 20090230340 | Bi-Directional Flapper Valve - The invention provides a valve assembly comprising a conduit with a bore | 09-17-2009 |
| 20100200243 | METHOD AND DEVICE - A device for use downhole comprises a body housing: a power source arranged to supply power to a driver; and a hydraulic system including a piston sealed in a chamber and an outlet provided at each opposing end of the chamber wherein each outlet is in communication with a respective reservoir, the driver being actuable to drive the piston in a first direction, such that fluid is driven out of the chamber through one outlet and simultaneously fluid is drawn into the chamber through the other outlet at the opposing end. | 08-12-2010 |
