EP 1286019 A1 20030226 - Expandable retaining shoe
Title (en)
Expandable retaining shoe
Title (de)
Aufweitbarer Schuhhalter
Title (fr)
Sabot de retenue expansible
Publication
Application
Priority
US 93404501 A 20010820
Abstract (en)
A downhole packer tool (10), in which extrusion of the packer element is limited, comprises a mandrel (28) having a packer element assembly (56). Packer retaining shoes (68, 70) are disposed about the mandrel at the ends of the packer element assembly. The packer retaining shoes have an inner retainer (80) and an outer retainer (82), the inner retainer having a plurality of segments (96) having gaps (106) therebetween that expand in width when the retaining shoe is moved from the initial position in which it is disposed about the mandrel to an expanded position wherein it engages the casing to limit the extrusion of the packer element assembly. The outer shoe is likewise made up of a plurality of segments (108) having gaps (128) therebetween that will expand. The inner shoe segments cover the gaps that exist between the outer shoe segments and the outer shoe segments cover the gaps that exist between the inner shoe 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. <IMAGE> <IMAGE>
IPC 1-7
IPC 8 full level
E21B 33/12 (2006.01)
CPC (source: EP)
E21B 33/1204 (2013.01); E21B 33/1216 (2013.01)
Citation (applicant)
- US 4151875 A 19790501 - SULLAWAY BOB L [US]
- US 5271468 A 19931221 - STREICH STEVEN G [US], et al
- US 5224540 A 19930706 - STREICH STEVEN G [US], et al
- US 5390737 A 19950221 - JACOBI RICKY D [US], et al
- US 44244895 A 19950516
- US 5540279 A 19960730 - BRANCH ALTON L [US], et al
- US 5701959 A 19971230 - HUSHBECK DONALD F [US], et al
Citation (search report)
- [X] US 6167963 B1 20010102 - MCMAHAN MICHAEL E [US], et al
- [X] US 2368928 A 19450206 - KING CHARLES M
- [PX] EP 1197632 A2 20020417 - GREENE TWEED INC [US]
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 1286019 A1 20030226; EP 1286019 B1 20090422; CA 2396242 A1 20030220; CA 2396242 C 20081007; DE 60232046 D1 20090604
DOCDB simple family (application)
EP 02255754 A 20020819; CA 2396242 A 20020730; DE 60232046 T 20020819