HOW REED WORKS

HOW REED WORKS

REED is a powerful hydraulic tool conveyed in the wellbore using jointed or coiled tubing. Using hydraulic pressure from surface, the tool pulls the bottom upward and closes to expand the elastomer elements laterally place a radial expansion force on the inside of the casing. Unlike other systems that use mechanical loading/unloading systems or explosive, REED’s expansion forces can be infinitely controlled from surface by varying operating pressure.

Analysis of the behavior is conducted prior to deployment. Key factors for successful deployment include casing size, grade and weight and the characteristics of the casing annulus such as hole size, log review, lithology, cement properties, and desired outcome. The expansion element and retainer size is carefully matched to the ID of casing to be expanded.

REED can perform up to four expansions in a single run. It can be deployed with one, two or three elements resulting in four, eight or twelve expansion in a single run. The elastomer element is a low-cost expendable item that quickly be replaced on surface.

Sturdy and robust, after dozens of runs resulting in hundreds of expansions, REED has never failed to expand the pipe, unset post-expansion, come out of the hole when required, or be retrieved from the wellbore intact.

Early in development of the casing expansion technology, operators and licensees were concerned that casing expansion would shatter cement, not compress it. This cutaway shows the compression of API oilwell cement that has been set for 28 days. Lab tests of cores of the compressed and uncompressed cement showed material decreases in porosity and permeability. Cracked cement would have result in increases of both..

Caliper log of a multiple expansion vent flow shut-off intervention. The large diameter expansions illustrate REED's annular restriction capabilities.
REED has undergone hundreds of shop tests prior to running. Each tool is function testing prior to field deployment.
Expanded tubulars after shop-press testing of various element/casing configurations
First tests of tool for 5½” casing with three-element configuration
In 2021 REED was adapted to operate with one, two or three elements. With the latter, the objective was to triple the expansion area in each test. The centralizer was added to ensure uniform expansion radial performance under high pressures and expansion forces.

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