Wells – Submerged well – Means removably connected to permanent well structure
Patent
1992-09-25
1994-04-19
Britts, Ramon S.
Wells
Submerged well
Means removably connected to permanent well structure
166298, 166 558, 166 664, 166147, 175269, E21B 33072
Patent
active
053037766
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a device conveyable on a wire particularly but not exclusively for a down-hole fluid operable assembly. More particularly the device is for a cutter assembly.
Heretofore when a length of tubing of a gas or oil well had to be removed, the tubing would be severed or cut by explosive or chemical type cutting assemblies which were by their very nature dangerous to handle, transport and use. Assemblies using hydraulic fluid cutters are known. They are safer, but are conveyed down-hole by lengths of tubing or coil tubing of a sufficiently small diameter to fit into the tubing to be cut. The fluid to operate the cutters is pumped down the center of the tool via the coil tubing. This method can take many hours, during which time the oil or gas well would be out of operation.
It is an object of the present invention to provide a fast and safe means for cutting lengths of down-hole tubing.
It is a further object of the present invention to provide a more stable down-hole assembly, particularly a cutting assembly.
According to a first aspect of the present invention there is provided a wireline conveyable device for a fluid operable borehole tubing assembly comprising a tubular body having a first end intended to form the upper end when in the borehole and a second open end intended to form the lower end, the tubular body including at least one aperture in a wall thereof to facilitate passage of fluid through the tubular body, electrically actuable outwardly moving anchoring means attached to the tubular body for positively locating the tubular member at a predetermined position within the bore tubing, in use, and an electrically actuable sealing means attached to the tubular body and arranged, in use, for selectively sealing the space between the borehole tubing and the tubular body to divert fluid through the tubular body to by pass the sealing means for driving fluid actuable means located adjacent said second lower end of the tubular body.
Since wireline is used, a fluid operated assembly such as a cutting assembly can now be conveyed and retracted from the borehole much faster than heretobefore.
The anchoring means can be independent of the sealing means but preferably it is carried by the anchoring means which is movable outwardly from the tubular body to form an anchoring and sealing engagement with the inner wall of the borehole tubing.
More preferably the combined anchoring and sealing means includes a plurality of outwardly deflectable members spaced around the outside of the tubular body, said members being fixed at a lower end to the tubular body and spaced therefrom at their upper end; an electrically actuable actuator including an annular deflector member slidably attached to the outside of the body and engagable on downward movement thereof with the upper ends of the deflectable members to deflect same outwardly into anchoring contact with the inner wall of the borehole tubing; and an annular sealing member carried by the upper ends of the deflectable members and engagable in sealing contact between the deflector member on downward movement thereof, and the inner wall of the borehole tubing, to form in use the sealing means.
In accordance with a second aspect of the invention there is provided a wireline conveyable device for a fluid operable borehole device comprising a body having first and second ends intended, in use, to form the upper and lower ends respectively; and an electrically actuable outwardly movable anchoring means attached to the tubular body arranged, in use, for anchoring the body of the device to the inner wall of the borehole.
A fluid operable down-hole assembly including the anchoring and or sealing device of the first or second aspects of the invention forms a further aspect of the invention.
The wireline conveyable device of the invention is actuable by means of a signal or power which is passed down the wireline and electrically actuable should be construed with reference thereto. In a preferred embodiment of the invention the signal or power passed thr
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Britts Ramon S.
Pipe Recovery Consultants Limited
Schoeppel Roger J.
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