Lloyd A. Crockford
Engineering at Cobre Vly, Houston, TX

8403036, Mar 26, 2013

Sep 14, 2010

12/881985

Adam K. Neer - Marlow OK, US
Emil Havelka - Houston TX, US
Lloyd Crockford - Houston TX, US

Halliburton Energy Services, Inc. - Duncan OK

E21B 33/128, E21B 33/129

166134, 166118, 166196, 277338, 277339, 277340, 277341

An apparatus for use in a wellbore is provided. The apparatus comprises a mandrel, a sealing element carried on the mandrel, the sealing element being radially expandable from a first run-in diameter to a second set diameter in response to application of axial force on the sealing element, and an extrusion limiting assembly carried on the mandrel and proximate the sealing element. The extrusion limiting assembly comprises a plurality of separate segments and a first circumferential band that retains the plurality of segments in a ring shape and substantially covers an outer circumferential surface of the plurality of segments while in a run-in condition of the apparatus.

2003022, Dec 11, 2003

Jun 10, 2002

10/166020

Donald Winslow - Duncan OK, US
Donald Smith - Duncan OK, US
Lloyd Crockford - Houston TX, US

E21B023/04

166/118000, 166/134000, 166/203000

An improved downhole tool apparatus for limiting the extrusion of a packer element. The apparatus includes a packer mandrel having a packer element assembly disposed in a wellbore. Packer retaining shoes are disposed about the packer mandrel at the ends of the packer element assembly. The packer retaining shoes have an inner retainer and an outer retainer. The inner retainer has a plurality of segments having gaps therebetween that expand in width when the retaining shoe is moved from an initial position in which it is disposed about the packer mandrel to an expanded position wherein it engages the wellbore to limit the extrusion of the packer element assembly. The outer retainer is likewise made up of a plurality of segments having gaps therebetween that will expand. The outer retainer engages the wellbore to limit the extrusion of the packer element assembly. The inner retainer segments cover the gaps that exist between the outer retainer segments and the outer retainer segments cover the gaps that exist between the inner retainer segments so that extrusion is limited. The packer retaining shoes also include a wedge disposed about the packer mandrel at the upper and lower ends of the packer element assembly. The retaining shoes provide enhanced high temperature and higher pressure performance in that extrusion in wells having high temperature and high pressure is severely limited if not completely prevented.

2003022, Dec 11, 2003

Jun 10, 2002

10/165999

Donald Smith - Wilson OK, US
Donald Winslow - Duncan OK, US
Lloyd Crockford - Houston TX, US

E21B033/12

166/118000, 166/134000

An improved downhole tool apparatus for limiting the extrusion of a packer element. The apparatus includes a packer mandrel having a packer element assembly disposed in a wellbore. Packer retaining shoes are disposed about the packer mandrel at the ends of the packer element assembly. The packer retaining shoes have an inner retainer and an outer retainer. The inner retainer has a plurality of segments having gaps therebetween that expand in width when the retaining shoe is moved from an initial position in which it is disposed about the packer mandrel to an expanded position wherein it engages the wellbore to limit the extrusion of the packer element assembly. The outer retainer is likewise made up of a plurality of segments having gaps therebetween that will expand. The inner retainer segments cover the gaps that exist between the outer retainer segments and the outer retainer segments cover the gaps that exist between the inner retainer segments so that extrusion is limited. The retaining shoes provide enhanced high temperature and higher pressure performance in that extrusion in wells having high temperature and high pressure is severely limited if not completely prevented.