US3887086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe racker
Assignee: Lee C Moore Corp
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Filing: 1974-06-14
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Granted: 1975-06-03
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Expires: 1994-06-14
Abstract
Abstract At one side of a transfer zone there are laterally spaced elongated members for supporting transversely thereof a plurality of parallel reclining pipestands. Means are provided for indexing the supporting members lengthwise across the transfer zone. At the transfer zone there are means for lifting each successive pipestand from the supporting members and moving it lengthwise to locate its leading end at an elevating position in an oil well derrick. Extending lengthwise of the pipestands adjacent the transfer zone is a steady arm, the end of which nearest the elevating position is pivoted on a horizontal axis. Connected to the other end of the arm are means for engaging the bottom of each lifted pipestand so that when the arm is swung upwardly and over toward the elevating position it can control the trailing end of the engaged pipestand while its leading end is being elevated at the elevating position.
Inventors
- 👤 Homer J Woolslayer
- 👤 Cecil Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:53
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/14; E21B19/15
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
152 words
A pipe racker comprising laterally spaced elongated trays for supporting transversely thereof a plurality of parallel reclining pipestands at one side of a transfer zone, means for indexing said trays lengthwise across said transfer zone, transfer means for lifting each successive pipestand at said transfer zone from said members and moving it lengthwise a predetermined distance to locate its leading end at an elevating position in an oil well derrick, a steady arm normally extending lengthwise of the pipestands adjacent said transfer zone, means pivoting the end of said arm that is nearest said elevating position on a transverse horizontal axis, means connected to the other end of the arm for engaging the bottom of each lifted pipestand, and means for then swinging said arm upwardly and over toward said elevating position to control the trailing end of the engaged pipestand while its leading end is being elevated at said elevating position.
Claim 2
Dependent Claim
152 words
A pipe racker comprising laterally spaced elongated trays for supporting transversely thereof a plurality of parallel reclining pipestands at one side of a transfer zone, means for indexing said trays lengthwise across said transfer zone, transfer means for lifting each successive pipestand at said transfer zone from said members and moving it lengthwise a predetermined distance to locate its leading end at an elevating position in an oil well derrick, a steady arm normally extending lengthwise of the pipestands adjacent said transfer zone, means pivoting the end of said arm that is nearest said elevating position on a transverse horizontal axis, means connected to the other end of the arm for engaging the bottom of each lifted pipestand, and means for then swinging said arm upwardly and over toward said elevating position to control the trailing end of the engaged pipestand while its leading end is being elevated at said elevating position.
Claim 3
Dependent Claim
152 words
A pipe racker comprising laterally spaced elongated trays for supporting transversely thereof a plurality of parallel reclining pipestands at one side of a transfer zone, means for indexing said trays lengthwise across said transfer zone, transfer means for lifting each successive pipestand at said transfer zone from said members and moving it lengthwise a predetermined distance to locate its leading end at an elevating position in an oil well derrick, a steady arm normally extending lengthwise of the pipestands adjacent said transfer zone, means pivoting the end of said arm that is nearest said elevating position on a transverse horizontal axis, means connected to the other end of the arm for engaging the bottom of each lifted pipestand, and means for then swinging said arm upwardly and over toward said elevating position to control the trailing end of the engaged pipestand while its leading end is being elevated at said elevating position.
Claim 4
Dependent Claim
152 words
A pipe racker comprising laterally spaced elongated trays for supporting transversely thereof a plurality of parallel reclining pipestands at one side of a transfer zone, means for indexing said trays lengthwise across said transfer zone, transfer means for lifting each successive pipestand at said transfer zone from said members and moving it lengthwise a predetermined distance to locate its leading end at an elevating position in an oil well derrick, a steady arm normally extending lengthwise of the pipestands adjacent said transfer zone, means pivoting the end of said arm that is nearest said elevating position on a transverse horizontal axis, means connected to the other end of the arm for engaging the bottom of each lifted pipestand, and means for then swinging said arm upwardly and over toward said elevating position to control the trailing end of the engaged pipestand while its leading end is being elevated at said elevating position.
Claim 5
Dependent Claim
50 words
A pipe racker according to claim 1, including actuating means carried by said steady arm for moving said pipe-engaging means lAterally away from a pipestand after said leading end has been elevated to suspend the pipestand in substantially vertical position, whereby the arm can be returned to its original position.
Claim 6
Dependent Claim
64 words
A pipe racker according to claim 1, in which said pipe-engaging means is a grooved wheel, and said actuating means include a bracket supporting the wheel and pivoted to said steady arm, and a fluid pressure cylinder and piston connected with the arm and said bracket to swing said wheel laterally away from a pipestand after the stand has been suspended in vertical position.
Claim 7
Dependent Claim
69 words
A pipe racker according to claim 1, in which said arm-swinging means include a stationary vertical sprocket at said arm pivoting means, a rotatable vertical sprocket mounted on the steady arm between said stationary sprocket and said other end of the arm, a chain extending around said sprockets, and means mounted on the steady arm and connected with the chain for pulling on it to swing the arm upwardly.
Claim 8
Dependent Claim
74 words
A pipe racker according to claim 1, in which said transfer means include a pair of normally inclined parallel arms spaced lengthwise of a pipestand at said transfer zone, means pivotally supporting the lower ends of the transfer arms on parallel axes, means at the upper ends of said transfer arms for engaging the bottom of a pipestand, and means for swinging the transfer arms in unison toward and away from said elevating position.
Claim 9
Dependent Claim
61 words
A pipe racker according to claim 1, in which said indexing means include a fluid pressure cylinder and piston rod pivotally connected to the trailing end of each tray and provided with stop means for preventing backward movement of the indexing means when the piston rod is extended from the cylinder, whereby the tray is pushed forward across said transfer zone.
Claim 10
Dependent Claim
65 words
A pipe racker according to claim 6, in which there is a plurality of superimposed pipe-supporting trays each of which is provided with longitudinally spaced open-top recesses for receiving pipestands, and said stop means of the indexing means attached to the upper tray projects down into successive recesses in the underlying trays to push against the latter in order to push the upper trays forward.
Claim 11
Dependent Claim
42 words
A pipe racker according to claim 1, in which there is a plurality of superimposed pipe-supporting trays slidable along one another, the racker including means for receiving and supporting said trays at the side of said transfer zone opposite said indexing means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |