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Publication numberUSD519136 S1
Publication typeGrant
Application numberUS 29/208,314
Publication dateApr 18, 2006
Filing dateJun 24, 2004
Priority dateJun 7, 2004
Also published asUSD523210, USD532798, USD533196
Publication number208314, 29208314, US D519136 S1, US D519136S1, US-S1-D519136, USD519136 S1, USD519136S1
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 top drive in a wellbore derrick
US D519136 S1
Abstract  available in
Images(2)
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Claims(1)
  1. The ornamental design for a swivel body for a top drive in a wellbore derrick, as shown and described.
Description

FIG. 1 is a perspective view of a design for a swivel body according to the present invention.

FIG. 2 is a top view of the swivel body of FIG. 1.

FIG. 3 is a first side view of the swivel body of FIG. 1.

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

FIG. 5 is a second side view of the swivel body of FIG. 1, opposite the first side shown in FIG. 3.

FIG. 6 is a front view of the swivel body of FIG. 1; and,

FIG. 7 is a rear view of the swivel body of FIG. 1.

Non-Patent Citations
Reference
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, IADC/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.
Classifications
U.S. ClassificationD15/140