Patent ID: 6491097
Filing Date: 2002-12-10
Classification: E21B

Abstract:
Abrasive slurry delivery apparatus operative for placement in a subterranean wellbore, comprising:a tubular structure having an internal flow passage through which a pressurized, abrasive slurry material may be axially flowed in a downstream direction; an axial portion of the tubular structure having a circumferentially extending side wall section with one or more outlet openings therein through which an abrasive slurry material may be outwardly discharged from the internal flow passage, the outlet openings being circumscribed by a peripheral edge; and shielding for protecting the peripheral edge portion of the side wall section from abrasive slurry material being discharged outwardly through the outlet openings, the shielding comprising inserts mounted in the side wall and formed from abrasive resistant material and wherein the inserts each contain passageways communicating with the outlet openings through which an abrasive slurry material may be discharged where by the peripheral edge portion of the outlets resist abrasion from flow of the abrasive slurry.