US 4,949,788 A · Well completions using casing valves

Abstract

A well is completed by cementing a casing string in place in the well. A jetting tool assembly is run into the casing string on a tubing string. The jetting tool assembly engages a sliding sleeve of a casing valve and slides the sliding sleeve to an open position uncovering a plurality of housing ports in the casing valve housing in which the sleeve is received. Then, disintegratable plugs are hydraulically jetted from the housing ports to communicate a subsurface formation adjacent the casing valve with an interior of the casing string. Preferably, prior to opening the sleeve and hydraulically jetting the plugs, residual cement is drilled from the casing string, then further residual cement is hydraulically jetted from the casing valve, and then the casing valve is backwashed by reverse circulation.

Claims29

Dependent claims

A method of completing a well, comprising:

(a) cementing a casing string in place in a borehole, said casing string including a casing valve, said casing valve including an outer housing with a plurality of housing ports defined through a wall thereof and a sliding sleeve received in said housing, said sleeve initially being in a closed position covering said housing ports, said housing ports initially being blocked by disintegratable plugs;
(b) running a jetting tool assembly into said casing string on a tubing string;
(c) sliding said sliding sleeve with said jetting tool assembly to a open position wherein said each of said housing ports is uncovered;
and
(d) hydraulically jetting said disintegratable plugs from said housing ports to communicate a subsurface formation adjacent said casing valve with an interior of said casing string.

2 more elements

Dependencies are inferred from the claim text.

Well completions using casing valves

Life of this patent

Well completions using casing valves

Life of this patent

Abstract

Claims29