초록 ▼

An improved abrasive slurry delivery apparatus and associated method of using same that permits repeated and/or extended use of the apparatus in a subterranean wellbore, and reduces abrasive wear during fracturing operations while increasing pump rate and proppant mass delivery capabilities. In a pr

An improved abrasive slurry delivery apparatus and associated method of using same that permits repeated and/or extended use of the apparatus in a subterranean wellbore, and reduces abrasive wear during fracturing operations while increasing pump rate and proppant mass delivery capabilities. In a preferred embodiment, an abrasive slurry delivery apparatus has a tubular crossover member with an internal flow passage and sidewall outlet openings formed with or without removable inserts formed from abrasive resistant materials. The internal flow passage is eccentrically offset to enlarge the effective flow cross-section, provide for tool passage clearance and to increase wall thickness for protection of a return flow passageway. The sidewall opening is positioned such that the opening is isolated from the secondary flow passageway.

대표청구항 ▼

1. 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 ha

1. 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.