US4221088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low lift, elevatable high floor drilling mast and substructure arrangement therefor
Assignee: PRE CORP Mfg Co
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Filing: 1979-01-02
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Granted: 1980-09-09
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Expires: 1999-01-02
Abstract
Abstract Low level base means extend longitudinally on the earth's surface. Drilling mast support means are positioned adjacent and pivotally connected to the base means and setback tower means are pivotally connected to the mast support means and to the base means. Drilling mast means are secured to the mast support means. Lifting frame means are connected to the drilling mast support means whereby said drilling mast support means, mast connected thereto and setback tower means may be simultaneously elevated from a reclined position to an upright position on the base means. Cable means may be secured at one end to the lifting frame means and extended around sheave means on the base means over sheave means on the lifting frame means and under sheave means on the mast support means and then connected at its other end with any suitable power source to exert a pull on the cable and elevate the mast support, mast and setback tower to an upright position on the base means where the mast may be secured in upright position. Elevatable drawworks support means is pivotally connected to the low level base means adjacent the other side of the drilling mast support means. The drawworks support means is provided with rotary table support means projecting from the drawworks support means. When the elevatable drawworks support means is raised to position it adjacent the upright drilling mast support means in a manner well known, the rotary table support means is properly positioned adjacent the drilling mast setback tower means so that the rotary table support means may be secured to the elevated setback tower to form a rigid substructure for the upright drilling mast.
Inventors
- 👤 Bradley C. Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:06
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/34; E21; E21B; E21B15/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
A low lift, high floor drilling mast and substructure arrangement therefor comprising: a. base means for resting on the earth's surface; b. drilling mast support means pivotally connected to said base means; c. setback tower means pivotally connected to said drilling mast support means and to said base means; d. elevatable drawworks support means pivotally mounted on said base means; e. drilling mast means secured to said mast support means; and f. lifting frame means connected to said drilling mast support means whereby said drilling mast means, support means therefor and setback tower means may be simultaneously elevated from a reclined position to an upright position on said base means.
Claim 2
Dependent Claim
110 words
A low lift, high floor drilling mast and substructure arrangement therefor comprising: a. base means for resting on the earth's surface; b. drilling mast support means pivotally connected to said base means; c. setback tower means pivotally connected to said drilling mast support means and to said base means; d. elevatable drawworks support means pivotally mounted on said base means; e. drilling mast means secured to said mast support means; and f. lifting frame means connected to said drilling mast support means whereby said drilling mast means, support means therefor and setback tower means may be simultaneously elevated from a reclined position to an upright position on said base means.
Claim 3
Dependent Claim
23 words
The invention of claim 1 including means to secure said drilling mast support means to said base means when in upright position thereon.
Claim 4
Dependent Claim
40 words
The invention of claim 1 including rotary table support beam means projecting from said drawworks support means for extending through said drilling mast support means when said drawworks support means is elevated to an upright position on said base means.
Claim 5
Dependent Claim
20 words
The invention of claim 3 including means to secure said rotary table support beams adjacent said upright setback tower means.
Claim 6
Dependent Claim
58 words
The invention of claim 1 wherein said drilling mast support means is a box frame structure having at least four sides and which when in reclined position has one of said sides supported by said reclined setback tower means on said base means and another of said sides laterally spaced and elevated in relation to said base means.
Claim 7
Dependent Claim
55 words
The invention of claim 5 including: a. means to secure said elevated side to said base means when said mast support means is in upright position thereon; and b. means to secure said rotary table support beam means to said upright setback tower means to provide a unitary substructure for said drilling mast supported thereon.
Claim 8
Dependent Claim
78 words
The invention of claim 1 wherein: a. said drilling mast support means is a box frame structure having at least four sides and which when in reclined position has one of said sides supported by said reclined setback tower means on said base means and another of said sides laterally spaced and elevated in relation to said base means; and b. said lifting frame means is connected to said laterally spaced, elevated side of said box frame structure.
Claim 9
Dependent Claim
37 words
The invention of claim 7 wherein said lifting frame means comprises at least a pair of laterally spaced beams connected to said laterally spaced, elevated side of said box frame structure and extending laterally and upwardly therefrom.
Claim 10
Dependent Claim
101 words
The invention of claim 8 wherein: a. said beams are each provided adjacent their upwardly extending ends with sheave means; b. sheave means mounted on said base means in longitudinal spaced relation to said pivotally connected drilling mast support means; c. sheave means mounted on said drilling mast support means; and d. cable means for securing adjacent the upwardly extending end of said beams and then extended around said sheave means on said base means, beams and mast support means for connection with a power source to simultaneously elevate said drilling mast support means, drilling mast means and setback tower means.
Claim 11
Dependent Claim
57 words
The invention of claim 7 wherein; a. said lifting frame means is pivotally connected to said elevated side of said box frame structure; and b. means for securing said lifting frame means in non pivotal relationship to said box frame structure to retain said lifting means in laterally and upwardly extendng relation to said box frame structure.
Claim 12
Dependent Claim
50 words
The invention of claim 1 including: a. floor means on said drawworks support means which extends through said mast means when said drawworks support means is elevated to an upright position; and b. floor means on said setback tower means adjacent said floor means on said elevated drawworks support means.
Claim 13
Dependent Claim
104 words
A low lift, high floor drilling mast and substructure arrangement therefor comprising: a. base means for resting on the earth's surface; b. drilling mast support means pivotally connected to said base means; c. drilling mast means secured to said mast support means; d. setback tower means pivotally connected to said drilling mast support means and to said base means; e. said setback tower means extending longitudinally of and between said mast support and mast means secured thereto and supporting said mast support and mast means on said base means when said mast, mast support means and setback tower means are in reclining position thereon.
Claim 14
Dependent Claim
104 words
A low lift, high floor drilling mast and substructure arrangement therefor comprising: a. base means for resting on the earth's surface; b. drilling mast support means pivotally connected to said base means; c. drilling mast means secured to said mast support means; d. setback tower means pivotally connected to said drilling mast support means and to said base means; e. said setback tower means extending longitudinally of and between said mast support and mast means secured thereto and supporting said mast support and mast means on said base means when said mast, mast support means and setback tower means are in reclining position thereon.
Claim 15
Dependent Claim
43 words
The invention of claim 12 including frame means connected to said drilling mast support means whereby said drilling mast means, support means therefor and setback tower means may be simultaneously elevated from a reclined position to an upright position on said base means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |