Material or article handling – Well pipe or rod racking mechanism – Vertical rack
Patent
1991-11-04
1993-09-14
Valenza, Joseph E.
Material or article handling
Well pipe or rod racking mechanism
Vertical rack
175 52, 175 85, 211 704, E21B 1900
Patent
active
052443299
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a pipe handling system, especially a new preferably electrically operated pipe handling system.
The invention also relates to a new type of fingerboard, especially for co-operating with an electrically driven preferably pipe-shaped pipe handling machine.
The invention also relates to a sidestep retraction system.
BACKGROUND OF THE INVENTION
The object of the invention is to provide an improvement in a pipe handling system. The object is achieved by the inventive features as defined in the appended claims and as described in the following.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic perspective view illustrating an embodiment of an arrangement in a pipe handling system according to the present invention.
FIG. 2A and 2B are side views of a pipe handling machine included therein.
FIG. 3 is a top view of a pipe handling fingerboard included therein.
FIG. 4a illustrates a prior art fingerboard.
FIG. 4b-4d illustrates alternative fingerboards according to the invention.
FIG. 5a-5d depict the principle function of the pipe handling according to the present invention, i.e.:
FIG. 5a illustrates pipe handling machine grips pipe at well center.
FIG. 5b illustrates pipe handling arm retracted for bringing pipe into finger locking ring groove.
FIG. 5c illustrates pipe handling arm rotating to select finger.
FIG. 5d illustrates pipe handling arms extended for bringing pipe into fingers.
FIG. 6a-6c are various views of the locking ring of the fingerboard according to the present invention.
FIG. 7a-7d illustrate the principles of the operation of the sidestep retraction system according to the present invention.
FIG. 8 is a side view of a derrick equipped with a drill block in accordance with the invention, shown centrally placed over the drill pipe.
FIG. 9 is a side view where the drill block is retracted from the central position to have connected thereto additional drill pipe sections
FIG. 10 shows the arrangement in same position as FIG. 9, but where the drill block and connected equipment are in upper position.
FIG. 11 shows the arrangement in plan view and horizontal section.
DESCRIPTION OF EMBODIMENTS
With reference to the enclosed drawings, various embodiments of the present invention and various concepts relating thereto, will be described.
The pipe handling system and the machine included therein will be built to fit into the derrick or rig floor design 1A. The main principles of the design are illustrated especially in FIGS. 1 and 2A and 2B.
The machine is based on a tower 1 built from for example 700 mm diameter pipe with two operating arms 2a, 2b built into the tower 1. This gives a very clean outside design. The tower 1 will be fixed in a position in the derrick and rig floor to handle all pipe operations between the well center --fingerboard--mouse hole.
The main load is taken on the rig floor. The pipe is handled by the two independently operated arms 2a, 2b, which may be compared with scissor arms.
The scissor arm principle used gives a horizontal in-out movement. This principle is easy to control with regard to position accuracy.
Using the scissor arm principle gives a very controlled extended reach. The forces imposed on the tower/arm/carriages are less than on other designs, by using this principle.
All drives are preferably based on A.C. motors with disc brakes driving through gear boxes, which operate on rack and pinion, driving the arms up and down--in and out. The A.C. motors are speed controlled by invertors. Proposed supplier of motor, brake, gear box, invertors is S.E.W. Eurodrive, using standard components. Using A.C. motor drives will give a controlled high speed and a very clean pipe handling machine (no hydraulic leaks).
The pipe handling machine is an independent unit not mechanically connected to the iron roughneck. This has caused problems in other designs including too much downtime due to units connected together. Prior designs also required the pipe handling and iron roughneck work to be carried out very close to th
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Eilertsen Bjorn A.
McGill John
Hitec A.S.
Valenza Joseph E.
Wallace Carol
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