Schlumberger Technology Corporation

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Gokturk Tunc

Rod W Shampine

Zheng Rong Xu

Jamie Cochran

Maria Yunda

Kellen Wolf

Ian Crossland

A technique facilitates the delivery and testing of a tool string assembly downhole. The technique employs at least one rotatable element valve in the tool string at a location which enables the rotatable element valve to be used for selectively blocking or allowing fluid flow along an interior passage of the tool string. A one-way valve, such as a flapper valve, dart valve, or spring loaded ball valve, is deployed within a rotatable element of each rotatable element valve to combine flow control functions, thus enabling a shorter tool string section. The at least one rotatable element valve also may be designed to facilitate pressure testing of the tool string.

Valve system for downhole tool string

A fiber optic coiled tubing assembly of multiple segments and coupling mechanism therefor. The assembly may be assembled from multiple coiled tubing segments which are pre-loaded with fiber optic line. Thus, the coupling mechanism may be employed for physical coupling of the coiled tubing segments as well as communicative coupling of the lines of the separate segments to one another. As such, pumping of a single fiber optic line through the coiled tubing assembly following coupling of the segments may be avoided. This may be of particular benefit for offshore operations where the joining of multiple coiled tubing segments is likely due to crane load capacity limitations and where such pumping may consume vast amounts of time.

Segmented fiber optic coiled tubing assembly

A mechanism configured for mechanical self-deployment in a well. The mechanism may be primarily an open or closed-cell polymer foam positioned downhole in a pre-compressed state. Subsequently, the mechanism may be released from a housing for self-deployment and engagement with a wall of the well. Such a mechanism may serve the conventional purpose of a downhole packer or other similar restriction devices. Additionally, due to the self-deploying nature of the device, multiple such devices may be linked in series based upon user-determined criteria at the time of application. Thus, a reduction in the number of trips in the well may generally be realized.

Mechanically deployable well isolation mechanism

A scale removal tool with adjustably positionable fluid dispensing arms. The scale removal tool may be configured for delivery to within a hydrocarbon well via coiled tubing. Thus, fluid may be driven through the coiled tubing and through the tool at the fluid dispensing arms. The fluid may thereby be jetted at high pressure toward scale at the wall of the well in order to achieve its removal. In the case of a well having scale of varying thicknesses, the fluid dispensing arms may be dynamically positioned and repositioned while downhole in the well, depending on scale thickness.

Dynamic scale removal tool and method of removing scale using the tool

A backpressure valve. The backpressure valve may be configured to maintain a substantially controlled pressure in coiled tubing uphole thereof while simultaneously being compatible with a ballistically actuated tool downhole thereof. The valve may include a housing with an uphole chamber in alignment with the coiled tubing and downhole chamber in alignment with the ballistically actuated tool. A gate mechanism disposed between the uphole and downhole chambers may thus be employed to receive a ballistic actuator from the uphole chamber for dispensing into the downhole chamber without sacrifice to pressure control within the coiled tubing.

Ballistically compatible backpressure valve

Various embodiments of an improved downhole disconnect tool are provided, some of which may include a first housing releasably connected to a second housing, a first piston releasably connected to the first housing, and a second piston releasably connected to the second housing. Various fluid communication ports and ball seats may be provided in various combinations in the first and second pistons and in the second housing to enable remote control of the tool by circulating one or more balls into engagement with one or more of the ball seats to disconnect the first housing from the second housing, and thereby disconnect any structures connected to the first and second housings, respectively. Other features and aspects of the invention are also provided.

Growing community of inventors

Sugar Land, TX, United States of America

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