Internal Pressure Sleeve for Use with Easily Drillable Exit Ports
Номер патента: CA2180047A1
Опубликовано: 30-12-1996
Автор(ы): Elis Vandenberg, Ian Gillis, Laurier E. Comeau
Принадлежит: Individual
Опубликовано: 30-12-1996
Автор(ы): Elis Vandenberg, Ian Gillis, Laurier E. Comeau
Принадлежит: Individual
Реферат: A joint of tubular casing with a pre-formed window in its sidewall, has a tubular sleeve fixedly attached to the interior of the tubular casing by a plurality of shearable set screws. The exterior surface of the sleeve is sealed to the interior surface of the tubular casing on opposing sides of the window. The window is filled with a fluid and then the window is covered with one or more layers of a composite material such as fiberglass. In use, the joint of tubular casing is run down to the depth of interest in an earth borehole, and then the window is oriented with respect to the formation of interest at the depth. The joint of tubular casing is then cemented in place, after which the tubular sleeve is retrieved by the use of a fishing tool causing the set screws to shear upon the upward movement of the fishing tool. After the interior sleeve is retrieved, a whipstock is lowered into the cased borehole, until it is oriented and anchored therein. The assembly automatically fixes the axial and circumferential orientation of the whipstock within a surrounding casing joint and holds the assembly in place. Alignment and fixing of the whipstock ensures proper engagement and orientation of a drill bit with an access window formed in the casing wall. The assembly employs multiple spring loaded latches which register with and extend into corresponding receiving recesses formed on the inner surface of the casing joint. The recesses, which are spaced circumferentially around the interior of the casing joint, contain differing profiles which uniquely mate with corresponding profiles on the latches. The relative position of the latches with the recesses determines the amount of radial latch movement providing keyless anchoring and orientation of the assembly within the casing. Setting is positively confirmed with a simple rotational force on the setting string. The spring loaded latches release from anchored, oriented position in response to an upward axial force exerted by the drill string to provide a straight pull release of the assembly. Confirmation of correct axial location and proper circumferential orientation may be made by surface monitoring of the setting string weight and turning torque.
Drilling apparatus and method for use with rotating drill pipe
Номер патента: US12049823B2. Автор: Robert SEDGEMAN,Adam Well,Daniel MINETT-SMITH,Everett HAGAR,Robert Mccullough. Владелец: NTS Amega West USA Inc. Дата публикации: 2024-07-30.