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. 03, 2024
Filed:
Feb. 03, 2022
National Oilwell Varco Norway As, Kristiansand S, NO;
Johannes Wilhelmus Henricus van Rijzingen, Oosterhout, NL;
Andrei Muradov, Houston, TX (US);
Grant Prideco, Inc., Houston, TX (US);
Abstract
Disclosed is an elevator for holding and end portion of a pipe in a drill tower. The elevator includes a hole from which, in operational use, an end portion of the pipe is suspended. The minimum diameter of the end portion of the pipe is selected larger than the minimum diameter of the hole, wherein sidewalls of the hole are shaped with a receiving surface for receiving correspondingly-shaped sidewalls of the end portion of the pipe. Similarly, sidewalls of the end portion of the pipe are shaped with an engagement surface for engagement with correspondingly-shaped sidewalls of the hole. Both the receiving surface and the engagement surface includes a first part and a second part neighbouring the first part, the first part defining a frustoconical shape having a first conicity, and the second part defining a shape having at least partially a second conicity lower than the first conicity.