Halliburton Energy Services, Inc.

Patrick Lyle Cherney

Henry Eugene Rogers

Nicholas Frederick Budler

Todd Anthony Stair

Gary Joe Makowiecki

Daniel Lee Schmidt

A check valve is provided having a magnetic plug and a magnetic seat. The magnetic seat and magnetic plug operationally engage so as to have a magnetic resistivity such that there is a first position in which the magnetic plug does not sealingly engage the magnetic seat and a second position where the magnetic plug is sealingly engaged with the magnetic seat.

Downhole tool with magnetic bypass seat

A downhole tool for creation of an annular seal in a well and a method of cementing a casing in a well, wherein tool and method make use of an expansion cone. The expansion cone is driven through a portion of the tool having a sealing element on the wellbore side so that the portion is expanded and the sealing element brought into contact with the wellbore. A force multiplier is used to increase the force exerted on the expansion cone by fluid pressure.

Expansion cone for downhole tool

In some embodiments, a subsurface wiping plug apparatus includes an internal bore that extends for less than a length of the apparatus. A ported case encloses internal components of the apparatus such that each port of the case is configured to couple the internal bore to an external side of the case. A plug capsule is coupled to an end of the ported case. The plug capsule contains an internal wiping plug that is releasable by internal pressure.

Growing community of inventors

Newton, KS, United States of America

Patrick Lyle Cherney