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US 7,000,503 B2Granted
Support system for power tong assembly
AssigneeMcCoy Bros. Inc.
InventorsDan Dagenais, Leslie L. Szalacsi, Jonathan B. Fraser, Hermann Basler
Life of this patent
Estimating the term…
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AssigneeMcCoy Bros. Inc.
InventorsDan Dagenais, Leslie L. Szalacsi, Jonathan B. Fraser, Hermann Basler
Estimating the term…
A tong assembly having a powered tong mounted over a backup tong is supported at its rear by a post with torque measuring means. The powered tong is supported at its front, near its throat, by one or more struts that extend downwardly to the backup tong. Such strut (s) provide support for the powered tong when the assembly is placed on a support surface for storage. The struts each have a joint with a retracted condition in which the joint is rigid when the tong is placed on a support surface, and an extended condition in which the joint allows a degree of lateral displacement when the tong assembly is applying torque to a pipe string. This maximizes the amount of torque passing through the rearward post, and therefore ensures a more accurate sensing of applied torque by the torque-measuring device.
A power tong assembly of the type having a suspension including struts extending downwardly from an upper, powered tong to a lower, backup tong, wherein the struts comprise joints either located within the strut or that operatively connect the strut to one of the tongs, said struts being configured to be selectively rigid or flexible so as to:
A power tong assembly comprising:
Dependencies are inferred from the claim text.