US3785506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill pipe handling apparatus
Assignee: Individual
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Filing: 1971-09-10
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Granted: 1974-01-15
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Expires: 1991-09-10
Abstract
Abstract Drill pipe handling apparatus for taking pipe from a well derrick floor to a pipe rack, wherein the pipe is transferred to a lower pivotable pipe support disposed in proximity to the pipe rack, and the pipe is then gradually lowered from said pipe support onto the pipe rack by a pivoting of the pipe support, and with the pipe supported during its lowering on a pair of pipe support arms extending laterally relative to the pipe support and pivoting in response to the weight of the pipe thereon.
Inventors
- 👤 R Crocker
- 👤 J Schoolcraft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:18
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/14; E21B19/15; E21B19/155
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
130 words
Apparatus for laying pipe on the pipe rack, comprising: a pivotable longitudinal pipe support adapted to be pIvoted from a support position supporting a length of pipe to a discharge position for laterally discharging the pipe therefrom; a pair of lateral pipe support arms mounted in proximity to said support for receiving the pipe discharged from said support with the pipe support arms in an upwardly extending position for preventing unrestricted discharge of the pipe to the area therebelow; arm pivoting means pivotally mounting said arms for pivotal movement from a raised pipe receiving position to a lowered pipe discharge position wherein the pipe is discharged therefrom onto a pipe rack or the like; and arm control means for automatically controlling the rate of lowering of said pipe support arms.
Claim 2
Dependent Claim
130 words
Apparatus for laying pipe on the pipe rack, comprising: a pivotable longitudinal pipe support adapted to be pIvoted from a support position supporting a length of pipe to a discharge position for laterally discharging the pipe therefrom; a pair of lateral pipe support arms mounted in proximity to said support for receiving the pipe discharged from said support with the pipe support arms in an upwardly extending position for preventing unrestricted discharge of the pipe to the area therebelow; arm pivoting means pivotally mounting said arms for pivotal movement from a raised pipe receiving position to a lowered pipe discharge position wherein the pipe is discharged therefrom onto a pipe rack or the like; and arm control means for automatically controlling the rate of lowering of said pipe support arms.
Claim 3
Dependent Claim
35 words
The structure set forth in claim 1, wherein: said means for automatically controlling the rate of lowering of said pipe support arms operates in response to the weight of the pipe rolling down said arms.
Claim 4
Dependent Claim
28 words
The structure set forth in claim 1, including: arm return means for automatically returning said arms to said raised pipe receiving position after the pipe is discharged therefrom.
Claim 5
Dependent Claim
63 words
The structure set forth in claim 3, wherein said arm return means includes: a fluid system operably connected to said arms and having a gas therewith which is compressed during the movement of said arms from said raised pipe receiving position to said lowered pipe discharge position for thereafter exerting a resilient returning force to said arms when the pipe is discharged therefrom.
Claim 6
Dependent Claim
49 words
The structure set forth in claim 1, wherein: each of said support arms is curved from its lower end which is disposed below said pipe support to its upper end which is disposed above and to one side of said support when said support is in said support position.
Claim 7
Dependent Claim
41 words
The structure set forth in claim 5, wherein: said arm pivoting means permits a pivoting of said support arms downwardly to position said upper end of each arm below said support when said arms are in said lowered pipe discharge position.
Claim 8
Dependent Claim
30 words
The structure set forth in claim 1, incuding: a pair of pipe dollys mounted for longitudinal movement in said pipe support and adapted to receive a length of pipe therein.
Claim 9
Dependent Claim
55 words
The structure set forth in claim 7, wherein: each of said dollys is pivotable with said pipe support has a pair of wheels thereon; and said pivotable pipe support has a wheel track surface engaged by said wheels as said dollys move longitudinally relative to said support and which is pivotable with said pipe support.
Claim 10
Dependent Claim
41 words
The structure set forth in claim 8, wherein: said pipe support also has means for confining the upper portions of said wheels to hold said dollys on said support when said support is pivoted to discharge pipe laterally from said dollys.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |