Oil well service rig
An oil well service rig having three reels, two of the reels actuated by a hydraulic pump through a gear box which provides for selective engagement or disengagement and a two speed gear ratio change for either reel, the hydraulic pump being driven by a gasoline engine. An independent hydraulically operated brake system is utilized on the reels wherein one side of each reel is provided with a greater diameter than the other side, the larger side having a brake caliper pad assembly in engagement therewith. A smaller reel, also controlled by the hydraulic motor, controls the inclination and disposition of a mast having a double sheave assembly at its top receiving cables from each main reel for raising and lowering tools into the oil well shaft.
- Assignee:
- IFI; EDB-81-089679
- Patent Number(s):
- US 4257578
- OSTI ID:
- 6160828
- Resource Relation:
- Patent File Date: Filed date 11 Jul 1978
- Country of Publication:
- United States
- Language:
- English
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