US 5,706,891 A · Gravel pack mandrel system for water-flood operations

Abstract

A gravel packed water-flood fluid injection mandrel is provided for a water-flood well which includes a side pocket having flow control device therein for injection of pumped water-flood fluid from the mandrel into a subsurface formation of interest. A gravel pack screen system is supported by the mandrel and is positioned so that injected water-flood fluid being discharged by the flow control device will flow through a perforate tubular member having a surrounding particulate exclusion screen. The gravel pack screen system is also arranged so that backflowing fluid flowing from the formation after termination of water-flood operations will be screened to exclude harmful particulate matter that might be entrained in the backflowing fluid. Thus, the flow control device of the mandrel will be protected against erosion or other damage by the gravel pack screen system which excludes predetermined particulate matter from the backflowing fluid.

Claims17

Dependent claims

A fluid injection mandrel and flow control system for connection within a fluid injection tubing string of a well for injection of water and other liquid materials into a subsurface earth formation intersected by a well bore having a well casing, comprising:

(a) a fluid injection flow control mandrel having an upper end adapted for connection to a fluid injection tubing string extending into the wellbore and defining an internal flow passage;
(b) a flow control pocket being located within said mandrel and being adapted for receiving a fluid injection flow control device for controlling pressurized injection of water and other liquid materials from said mandrel into said wellbore, said flow control pocket defining an injection fluid inlet in communication with said internal flow passage, a flow control receptacle for receiving said flow control device and further defining a fluid injection port opening externally of said mandrel;
and
(c) screen means being supported by said mandrel and being oriented with respect to said fluid injection port for screening fluid flowing into said fluid injection port during conditions of injected fluid backflow from said subsurface earth formation.

1 more element

(a) a fluid injection flow control mandrel having an upper end adapted for connection to a fluid injection tubing string extending into the wellbore and defining a lower end and an internal flow passage;
(b) a flow control pocket being located within said mandrel and being adapted for receiving a fluid injection flow control device for controlling pressurized injection of water and other liquid materials from said mandrel into said wellbore, said flow control pocket defining an injection fluid inlet in communication with said internal flow passage, a flow control receptacle for receiving said flow control device and further defining a fluid injection port opening externally of said mandrel;
(c) an elongate perforate tubular member extending downwardly from said mandrel;
and
(d) a screen element being supported about said elongate perforate tubular member and being oriented with respect to said fluid injection port for screening fluid flowing into said fluid injection port during conditions of injected fluid backflow from said subsurface earth formation.

2 more elements

Dependencies are inferred from the claim text.

Gravel pack mandrel system for water-flood operations

Life of this patent

Gravel pack mandrel system for water-flood operations

Life of this patent

Abstract

Claims17