WearSox LP has teamed up with Davis-Lynch to market a unique solution for the centralization of tight tolerance casing wells.

By applying WearSox® spray metal to locate the one-piece Davis CentraLaser™ directly onto the casing, when the bow-spring needs to collapse, it is now PULLED rather than pushed, avoiding the possibility of catastrophic bow-spring buckling. On reaching the previous casing shoe the bow-spring reopens to its natural diameter to centralize the casing in the under-reamed open hole.

This arrangement overcomes the issues of handling stabilizer or centralizer subs and the introduction of further potential failure points (connections) in the casing string.

Furthermore the CentraLasers™ themselves are also now given a thin coating of WearSox® spray metal to reduce the bow-spring starting force, reduce running friction and increase the wear-ability of the bow-springs themselves. Finally a thin band of WearSox® spray metal is applied above and below the bow-spring, to the same diameter as the end collar, to act as a centralizing guide. The whole assembly is bi-directional should the casing need to be worked up and down at any point during its running.

Please contact Davis-Lynch for a quotation and a list of the currently available casing sizes that CentraLasers™ can be used with.”