Apparatus for treating a wellbore screen and method
AssigneeSchlumberger Canada Limited
InventorFred Harmat
Life of this patent
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Abstract
An apparatus and methods for applying an inner coating to a wellbore screen are described. The apparatus comprises a support for the wellbore screen, an elongate injector for injecting coating material into the inner bore of the wellbore screen, and a driver for positioning the elongate injector into the inner bore and moving the elongate injector through the inner bore to introduce coating material to the inner bore. The elongate injector has a supported end, a distal end, and a coating material delivery line extending through the elongate injector from a coating material supply to a port at the distal end.
Claims13
A method for treating a wellbore screen, the method comprising:
- inserting an elongate injector into an inner bore of a wellbore screen including a tubular wall with an inner tubular surface defining the inner bore, an outer tubular surface and a screening component installed to screen fluid passing through the tubular wall from the outer tubular surface to the inner bore;
- heating a coating material to convert it from a solid to a liquid;
- introducing the coating material in the form of the liquid via the elongate injector;
- reheating the coating material while it is in the elongate injector before it is applied onto the inner bore inner tubular surface;
- distributing the coating material onto the inner tubular surface by pushing a ring-shaped spreader head through the inner bore and against the inner tubular surface such that the coating material penetrates to some extent into the screening component from the inner tubular surface;
- and allowing the coating material to set to form a removable seal across the screening component in the inner diameter.
Dependencies are inferred from the claim text.