The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 1989
Filed:
Jan. 18, 1989
Thomas Schasteen, Garland, TX (US);
Lonnie J Smith, Allen, TX (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
A latching tool for retrieving downhole well instruments and devices is adapted to be connected to the lower end of a tubing string for movement for movement to engage a fishing head connected to the instrument or device to be retrieved from the wellbore. The latching tool includes a body made up of separable members and having a through bore formed therein, plural radially movable spring biased latching dogs, and an elongated sleeve disposed for sliding movement in said bore for holding said latching dogs in a retracted position and permitting said latching dogs to move to an extended and latching position in response to movement of the sleeve.