Downhole tool
AssigneeHamdeen Incorporated Limited
InventorRichard Keith Booth
Life of this patent
Estimating the term…
Abstract
A downhole tool for conditioning a casing or liner. The tool includes blades having a a circumferential peripheral edge for 360 degree contact with the casing or liner and are formed from a composite material which comprises a polymeric fibre. Such polymeric fibres include Kevlar®, Twaron®, Dyneema®, Spectra® and Diolen®. Bypass channels for fluid flow past the tool are provided in either the tool body or the blades.
Claims22
A downhole tool for conditioning a casing or liner wall, the tool comprising a substantially cylindrical body connectable in a work string, a sleeve located around the body, one or more blades located on the sleeve, wherein each blade has a circular peripheral edge distal to the sleeve and each blade is manufactured from a composite material which comprises a polymeric fibre.
A holding device for preventing longitudinal movement of a sleeve(S) on a substantially cylindrical tool body, the device comprising a split ring, a retaining ring and a circlip.
A method of conditioning a casing or liner in a well bore, the method comprising the steps:
- (a) locating on a work string, a blade having a circular peripheral edge and made from a composite material which comprises a polymeric fibre;
- (b) inserting the work string into the well bore to a position where the peripheral edge makes contact with an inner wall of the casing or liner;
- and
- (c) moving the work string relative to the inner wall to thereby move the blade relative to the wall and provide a grooming action on the wall.
A method of forming a scraper for a downhole tool, the method comprising the steps;
- (d) providing a sheet of composite material comprising a polymeric fibre;
- (e) instantaneously subjecting the material to a first water pressure from a water jet;
- and
- (f) moving the material relative to the jet to cut a profile of a scraper from the material while maintaining the water at substantially the first pressure.
Dependencies are inferred from the claim text.