US Patent: 1,287,203
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| Drill Tube Section
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Patentees:
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| Peter Boyd (exact or similar names) - Beaver, PA |
| Augustus M. Saunders (exact or similar names) - McKeesport, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 26, 1918 |
| Granted: |
Dec. 10, 1918 |
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Joel Havens
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Description: |
| D. Anthony Umica - patent attorney
Abstract:
Our invention relates to drill tubes used in boring deep wells and formed of a series of detachably connected sections, carrying a boring tool at the lower end. The drill tube is rotated in practice and is subjected to torsional strains. The common construction of tube consists of comparatively short lengths of pipe, two of which are coupled together to constitute each section, and each section of which is connected to the next by a separate device referred to as the "tool joint" and usually of the box and pin type.
Claim:
An improved drill tube section comprising a hollow metal tube having its ends integrally shaped and threaded to form a tapered threaded box and pin joint, the ends being upset outward to form shoulders for engagement by the lifting or other tools, and having a shoulder on the pin end to be engaged by the box end to limit the movement of the parts together and prevent splitting of the box end and undue strain on the threads in screwing the sections together, the ends also being upset inward and for a length greater than is required for the joint when new so that new threads may be formed when the initial threads wear out and may be extended further into the upset portions and the outer ends of said upset portions removed, thus providing a new joint practically identical with the initial one. |
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