Invention Grant
- Patent Title: Pumpdown apparatus and method
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Application No.: US16901477Application Date: 2020-06-15
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Publication No.: US11377912B2Publication Date: 2022-07-05
- Inventor: Charanjit Singh Sandhu
- Applicant: CORDAX EVALUATION TECHNOLOGIES INC.
- Applicant Address: CA Calgary
- Assignee: CORDAX EVALUATION TECHNOLOGIES INC.
- Current Assignee: CORDAX EVALUATION TECHNOLOGIES INC.
- Current Assignee Address: CA Calgary
- Agency: Bennett Jones LLP
- Main IPC: E21B17/07
- IPC: E21B17/07 ; E21B17/06

Abstract:
A shock absorber apparatus includes a rod; a tool connection on a first end of the rod; a piston on a second end of the rod; a flange on the rod between the tool connection and the piston; a ring connection slidably connected to the rod between the tool connection and the flange; a first spring between the ring connection and the flange to bias the ring connection axially away from the flange; a sleeve, connected to a second spring between the second spring and the piston, slidably encircling the piston and a portion of the rod, and extending past the piston to a pumpdown connection; and a fin. A method for a placing a tool in a landing ring of a drilling tubular includes using the shock absorber apparatus to absorb shocks caused by the landing operation.
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