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US 4,061,233 AGranted
Drilling rigs
OwnerJoseph Reginald Benjamininventor
Life of this patent
Estimating the term…
Abstract
A drilling rig mounted on a bore inclined to the vertical in which transfer of drill strings from a store to the bore is effected on the low side of the rig.
Claims6
A drilling apparatus comprising, in combination
- a. a pile having an axis inclined to the vertical in a plane of inclination;
- b. a drill string within said pile;
- c. a frame mounted on said pile;
- d. a derrick having a foot end and a head end, said foot end pivotally mounted to said frame for angular movement of said derrick in said plane of inclination;
- e. drill stem storage means having access means positioned angularly below said pile axis;
- f. derrick adjustment means operable to move said derrick head end between a position vertically above said access means and a position on said pile axis;
- g. hoisting means on said derrick operable to transfer drill stem from said storage means to said pile with the lower end of said drill stem always positioned in the space angularly below said pile axis;
- and
- h. winch means on said derrick intermediate said head and said foot end, said winch means having flexible hauling means engageable with said drill stem during transfer by said hoisting means to control movement of the lower end thereof between said storage means and said pile.
6 more elements
Dependencies are inferred from the claim text.