Patent ID: 6668923
Filing Date: 2003-12-30
Classification: E21B

Abstract:
A method of placing cement in an outer annulus around a first tube suspended within a well bore, said first tube having a first flow bore therein, said method comprising the steps of:a. providing a pair of axially separated annulus barriers in an outer annulus around said first tube; b. providing an ingress flow orifice in said first tube between said annulus barriers with greater proximity to a first annulus barrier; c. providing an egress flow orifice in said first tube between said annulus barriers with greater proximity to a second annulus barrier; d. enclosing said egress ingress flow orifice with a screen having fluid flow openings of a selected dimension; e. suspending a cementing tool within said first flow bore, said cementing tool having a second flow bore and a cement flow orifice between said first and second flow bores, sealing elements bridging an inner annulus between said cementing tool and said first tube to isolate a flow channel from said second flow bore into said outer annulus; f. blending an additive with cement, said additive having the capacity to plug the fluid flow openings in said screen; and g. pumping the blended cement along said second flow bore into said outer annulus until said fluid flow openings in said screen are substantially plugged.