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Publication numberUSD524334 S1
Publication typeGrant
Application numberUS 29/207,009
Publication dateJul 4, 2006
Filing dateJun 7, 2004
Priority dateJun 7, 2004
Also published asCA108661S, CA114991S
Publication number207009, 29207009, US D524334 S1, US D524334S1, US-S1-D524334, USD524334 S1, USD524334S1
InventorsRobert Alden Folk, Steven Lorne Folk
Original AssigneeVarco I/P, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Swivel body for a well top drive system
US D524334 S1
Abstract  available in
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  1. The ornamental design for a swivel body for a well top drive system, as shown and described.

FIG. 1 is a perspective view of a first side and a first end of swivel body according to the present invention.

FIG. 2 is a perspective view of a second side opposite the first side of FIG. 1 and a second end opposite the first end of FIG. 1.

FIG. 3 is a bottom view of the swivel body of FIG. 1; and,

FIG. 4 is a top view of the swivel body of FIG. 1.

Non-Patent Citations
11000 Ton AC Top Drive-TDS-1000, Varco Systems, 2 pp., 2002.
2500 Ton DC Top Drive IDS-1, Varco Systems, 2 pp., 2002.
3750 Ton DC Top Drive TDS-45, Varco Systems, 2 pp., 2002.
4AC Top Drive Technology Update #2, Varco Systems, 1 p. Prior to 2002.
5An Overview of Top-Drive Drilling Systems Applications and Experiences, G.I. Boyadjieff, 1ADC/SPE 14716, 8 pp. 1986.
6Challenger Rig & Mfg., Inc., Doghouse, Composite Catalog 1982-83, p. 1984-C, 1982.
7Top Drive Drilling System TD 500 PAC Variable Frequency AC Top Drive, National Oilwell, 6 pp., 2002.
8Varco Pioneers AC Top Drive, Engineering Award Winners, AC Top Drive Technology Update #1, Hart's Petroleum Engineer, 4 pp., Apr. 1997.
9Varco's Top Drive Systems are advancing the technology of drilling, Varco Systems, 8 pp., 2001.
U.S. ClassificationD15/140