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This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-12558737-B2, on 24 February 2026. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000002627

Back purging robotic crawler

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Classification
Manufacturing & Assembly Equipment › Joining and Welding
Inventors
AL MANSOUR SALEH MOHAMMED H, ALNUFAILI MUHAMMED SUBHI A, AL QABANI ALI FARAJ M
Assignee
SAUDI ARABIAN OIL CO
Original source
US-12558737-B2, the United States Patent and Trademark Office, 24 February 2026
Document SHA-256
d4d6a659d50aff0eabb28156adac35db49ff9946a30308d9cc574ab4252aa306

Abstract

A robotic crawler for back purging a weld location in a piping circuit includes a body, one or more conveyors coupled to the body for transporting the robotic crawler within the piping circuit, first and second seal assemblies configured to generate an interference seal with an interior of the piping circuit, a pair of extendable arms, each extendable arm supporting a respective one of the first and second seal assemblies on an opposite side of the body, each respective extendable arm selectively extendable and retractable with respect to the body to adjust a position of the respective seal assembly with respect to the body, and an inert gas flow valve for providing an inert gas into a sealed area defined between the first and second seal assemblies.

Publication information

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Citation

OpenTechnical Publication OT-2026-000002627, “Back purging robotic crawler,” published September 15, 2026 at 19:14:17 UTC, https://opentechnical.org/p/OT-2026-000002627.

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This record reproduces a document published elsewhere and is provided for reference and study. Rights in the original remain with its owner. See the publication policy.