Nozzle selective perforating jet assembly

摘要

A downhole hydraulic tool employing multiple nozzles in a selectable fashion from an oilfield surface. At least one of the nozzles of the tool is equipped with a burst disk such that fluid pressure directed from the surface may be utilized in activating the nozzle. The pressure may be driven to exceed a predetermined level for sake of the activating by way of sealing off access to other nozzle(s) therebelow, for example, by way of standard ball drop techniques. Thus, nozzle selectivity may be taken advantage of when a first nozzle wears out without requiring time consuming removal of the tool from the well for sake of remedial repairs or replacement.

主权项

1. A nozzle selective jetting tool comprising:
a first jetting nozzle at a first location of the tool for a first perforating application; a second jetting nozzle at a second location of the tool for a subsequent perforating application; a burst disk coupled to said second nozzle for occluding access thereto when pressure in a central channel of the tool is below a predetermined level; and an anchor segment for anchoring the tool in advance of the perforating applications.