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| Number | Title | Issue Date |
| 7357021 | Methods of monitoring downhole conditions Methods of monitoring various downhole conditions are described, including a system for determining and/or identifying the flow of fluid in a well, determining sand production in a well, identifying localized events in a well, determining the apparent flow velocity ... | 04/15/2008 |
| 7322421 | Fiber optic deployment apparatus and method A head member having a piston provided thereon is connected to an elongate tube such as a micro-tube. The micro-tube contains one or more optical fibres, preferably suspended therein by a protective fluid such as a scavenging gel. The head member is preferably inser... | 01/29/2008 |
| 7242103 | Downhole electrical power generator A downhole electrical power generator. A downhole electrical power generating system includes a flow restricting device which variably restricts flow through an opening, the restricting device vibrating in response to flow through the opening and the restricting dev... | 07/10/2007 |
| 7240737 | Direct proportional surface control system for downhole choke A direct proportional control system for remotely controlling actuation of a tool. A well control system includes an actuator for a downhole well tool, the actuator including an actuator member which displaces to operate the well tool. A control system member is pos... | 07/10/2007 |
| 7218820 | Method and system for providing a hydrogen diffusion barrier for fiber optic cables used in hostile environments A fiber optic conduit for use in a hostile environment includes a hydrogen barrier shell that is disposed outwardly from an inner axial tube. The hydrogen barrier shell comprises a material that is capable of reducing hydrogen permeation through the fiber optic cond... | 05/15/2007 |
| 7210856 | Distributed temperature sensing in deep water subsea tree completions A deep water subsea tree completion having a distributed temperature sensing system. In a described embodiment, a method of installing an optical fiber in a well includes the steps of: conveying an optical fiber section into the well; and monitoring a light transmis... | 05/01/2007 |
| 7191828 | Hydraulically set concentric packer with multiple umbilical bypass through the piston A hydraulically set concentric packer with multiple umbilical bypass through the piston. In a described embodiment, a packer for use in a subterranean well includes a piston which displaces to set the packer in the well, and a line extending through the piston. The ... | 03/20/2007 |
| 6470970 | Multiplier digital-hydraulic well control system and method A system for transmitting hydraulic control signals or hydraulic power to downhole well tools while significantly reducing the number of hydraulic lines required. Hydraulic control signals are furnished at relatively low pressures to actuate a selected we... | 10/29/2002 |
