Abstract: An interruption sub for a downhole tool the downhole tool activatable by detonation. The interruption sub includes a barrier movable between a biased closed position and an open position. Preventing ballistic transfer to the downhole tool in the closed position and allowing ballistic transfer to the downhole tool in the open position. A detonation path within the interruption sub, wherein the barrier is hydraulically or electronically movable from the closed position to the open position in response to at least one condition acceptable for ballistic transfer. Also included is a downhole tool activatable by detonation.

Abstract: An interruption sub for a downhole tool the downhole tool activatable by detonation. The interruption sub includes a barrier movable between a biased closed position and an open position. Preventing ballistic transfer to the downhole tool in the closed position and allowing ballistic transfer to the downhole tool in the open position. A detonation path within the interruption sub, wherein the barrier is hydraulically or electronically movable from the closed position to the open position in response to at least one condition acceptable for ballistic transfer. Also included is a downhole tool activatable by detonation.

Abstract: A fracturing/gravel packing tool system with dual flow capabilities. A method of treating a well includes the steps of: flowing a fluid into the well through a work string while simultaneously flowing another fluid into the well through an annulus; and directing each of the fluids to the exterior of a well screen in the well. A well treatment system includes a slurry and a fluid flowed into a well. The slurry has an initial density, but the fluid is mixed with the slurry in the well, thereby causing the slurry to have a reduced density in the well. Another method of treating a well includes the steps of: installing a gravel packing assembly including a well screen in the well; flowing a slurry and a fluid into the well; mixing the slurry with the fluid, thereby reducing a density of the slurry in the well; and flowing the reduced density slurry about an exterior of the well screen.

Abstract: A filter valve adapted for use in a work string above a pressure actuated down hole device. When open, the filter valve provides full bore access to the bore hole. When closed, the filter valve prevents particles in a work string from settling on the down hole device while allowing fluid pressure to be applied to the down hole device for actuation. The filter valve may be a flapper made of a porous or other filtering material that allows fluid to flow through the flapper, but blocks particle flow. The flapper may be closed and opened by any means known in the art, but does not hold pressure when closed. The filter valve may be any conventional valve, in combination with a bypass flow path and a filter. The bypass flow path allows fluid to bypass the valve and the filter prevents particles from flowing through the bypass.

Abstract: A fluid flow control device (130) for use in a wellbore to control the inflow of production fluids comprises a screen assembly (132) positioned around a base pipe (134). The base pipe (134) has a blank pipe section and a perforated section including at least one fluid passageway (136). The screen assembly (132) has a filter medium section (142) positioned around the blank pipe section and defining a first region (144) therebetween and a housing section (146) positioned around the perforated section defining a second region (148) therebetween with a sleeve (150) slidably positioned therein. When it is desired to prevent the inflow of the production fluids through the fluid flow control device (130), the sleeve (150) is operated from a first position to a second position which prevent fluid flow from the second region (148) to the fluid passageway (136).

Abstract: A fracturing/gravel packing tool with variable direction and exposure exit ports. A system for delivering an erosive flow into a subterranean well includes a port displacing in the well while the erosive flow passes through the port. Various displacement devices may be used in the system to displace the port.