Invention Grant
- Patent Title: Bottom hole assemblies with expandable cladding sheaths for drilling ahead through a lost circulation zone of a wellbore
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Application No.: US17147674Application Date: 2021-01-13
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Publication No.: US11428051B2Publication Date: 2022-08-30
- Inventor: Onos Sunday Ogelohwohor
- Applicant: Saudi Arabian Oil Company
- Applicant Address: SA Dhahran
- Assignee: Saudi Arabian Oil Company
- Current Assignee: Saudi Arabian Oil Company
- Current Assignee Address: SA Dhahran
- Agency: Dinsmore & Shohl LLP
- Main IPC: E21B10/08
- IPC: E21B10/08 ; E21B10/64 ; E21B23/03 ; E21B29/00

Abstract:
Bottom hole assemblies for drilling through a lost circulation zone of a wellbore includes a drill string, a drill bit and a cladding seat coupled to the drill string, an expandable cladding sheath engaged with the cladding seat, a release mechanism coupling an uphole end of the expandable cladding sheath to the drill string, and an expander translatable axially along the drill string. The expandable cladding sheath is a fiber reinforced polymer. The cladding seat releasably couples a downhole end of the expandable cladding sheath to the drill string, and the release mechanism operates to release the uphole end of the expandable cladding sheath from the drill string. The expander deforms the expandable cladding sheath outward into contact with a wall of a wellbore when translated axially through a central cavity of the expandable cladding sheath. The bottom hole assembly may enable drilling ahead through a lost circulation zone.
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