Ronald Scott Alders

Jeffrey Golinowski

Daniel P Lupien

A packer assembly includes (a) a mandrel bearing an expandable packer element, the mandrel having a ratchet section, a lower collet retaining shoulder, and defining a plurality of longitudinal slots; (b) a push sleeve connected to a ratchet ring by at least one shear pin, wherein the ratchet ring is disposed between push sleeve and the mandrel and engages the mandrel ratchet section; (c) a shift sleeve comprising an inner shift sleeve slidingly disposed within the mandrel and having a lower collet, the inner shift sleeve defining a profile for engaging a shifting tool, and an outer shift sleeve slidingly around the mandrel and connected to the inner shift sleeve with a plurality of bolts, wherein each bolt passes through a longitudinal slot defined by the mandrel; (d) wherein the shift sleeve and push sleeve is moveable between a running position and a released position. Also disclosed are methods of using a packer actuated by a sliding sleeve.

Coil shiftable packer

A swellable packer assembly includes a mandrel, a base pipe disposed within the mandrel, a swellable seal element retained externally on the mandrel, and a shearable member that releasably secures the base pipe to the mandrel. In use, the base pipe forms part of a downhole tubing string in a wellbore. The seal element is swelled with a swelling fluid to seal between an outer wall of the mandrel and a wellbore wall. The shearable member is allowed to shear so that the injection tubing string including the base pipe may move axially within to the wellbore, while the seal element and the mandrel remain stationary relative to wellbore, with the seal element in contact with the wellbore wall. The assembly may help to avoid distortion of and damage to the seal element that may otherwise occur due to thermal expansion and contraction of the downhole tubing string.

Swellable packer assembly for a wellbore system

A steam diverter apparatus for forming part of a downhole tubing string is provided. The apparatus may be used in a SAGD operation to control flow of steam into a formation. The apparatus includes a tubular housing defining steam-admitting ports, and containing a moveable shift sleeve. The apparatus is modifiable for use with position shifting tools of different outer diameters by interchanging first and second sets of the shift sleeve and insert rings having different minimum inner diameters within the housing. The open flow area of the apparatus is modifiable by plugs that block the ports and are removably attached to the housing. The plug, the shift sleeve, or both of them may be made of a dissolvable material, so that they can be dissolved by a chemical solution injected into the tubing string, for the purpose of controlling steam flow through the ports.

Growing community of inventors

Cold Lake, Canada

Ronald Scott Alders