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:
Dec. 08, 2020
Filed:
Sep. 11, 2017
Shell Oil Company, Houston, TX (US);
Wissam Assaad, Rijswijk, NL;
Djurre Hans Zijsling, Rijswijk, NL;
SHELL OIL COMPANY, Houston, TX (US);
Abstract
A tubular pull string assembly (A) may be used to pull up an expansion mandrel () through an area of overlap () between an upper section of a well liner () expanded by the expansion mandrel and a lower section of a previously installed liner (). The tubular pull string assembly may be provided with at least one flow port (), through which fluid is permitted to flow from the exterior () to the interior () of the tubular pull string assembly during pop out of the expansion mandrel from the area of overlap. In addition thereto, or instead thereof, the expansion mandrel may be provided with a streamlined tail (A) section having an inwardly tapered outer surface () that intersects a longitudinal axis of the expansion mandrel at a sharp angle. The sharp angle can be less than 20 degrees. The tail section can have a length of at least several centimeters.