Coiled tubing gamma ray detector
AssigneeSchlumberger Technology Corporation
InventorsGuillaume Revellat, Robert Van Kuijk, Robert Greenaway, Sarmad Adnan
Life of this patent
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Abstract
A downhole tool for use in coiled tubing well operations. The tool includes a gamma ray detector for determining well location information for an associated coiled tubing application. The well location information may relate to well depth and/or the locating and identifying of a particular side branch or lateral leg of the well. Additionally, the gamma ray detector may be utilized to monitor dynamic well conditions in real-time such as the flow of injected fluids or the effectiveness of clean out applications via the coiled tubing.
Claims22
A method comprising:
- deploying into a well a coiled tubing assembly with a fiber optic line running therethrough to a flow-through gamma ray detector, the fiber optic line disposed within the fluid flow path of the coiled tubing from a well surface to the gamma ray detector;
- detecting substantially static gamma ray formation characteristics of the well with the flow-through gamma ray detector;
- comparing the substantially static gamma ray formation characteristics with a stored gamma ray reference log for the well;
- determining the location of the coiled tubing assembly within the well;
- performing an application at the determined location in the well;
- and
- monitoring and detecting gamma rays related to a dynamic condition of the application with the gamma ray detector while performing the application.
A coiled tubing equipment assembly comprising:
- coiled tubing with a fiber optic line running therethrough and configured for deployment in a well;
- a flow-through gamma ray tool comprising a gamma ray detector coupled to a downhole end of the fiber optic line and configured to detect gamma rays to provide well location information in real-time over the fiber optic line during deployment and dynamic well condition information in real-time over the fiber optic line while performing a coiled tubing application;
- a coiled tubing reel to accommodate said coiled tubing and fiber optic line at an oilfield surface and positioned adjacent the well for deployment of the coiled tubing and fiber optic line, the fiber optic line disposed within the fluid flow path of the coiled tubing from the reel to the gamma ray detector;
- and
- a processing unit for positioning at the oilfield surface adjacent said coiled tubing reel to wirelessly acquire the real-time well location information and the real-time dynamic well condition information therefrom.
Dependencies are inferred from the claim text.