Ball sealer
First Claim
Patent Images
1. A ball sealer for seating against high flow perforations in oil well casing during fluid injection, comprising:
- a spherical core which forms a suitable base on which to wrap a filament; and
a layer of thermosetting filament wrapping outside the core which is sufficiently thick to give the ball sealer the strength necessary to withstand the pressure differential across a perforation in oil well casing during fluid injection.
4 Assignments
0 Petitions
Accused Products
Abstract
A ball sealer for use in flow equalization during fluid injection into oil wells is described which has a layer of thermosetting filament wrapped around its core. After curing, the wrapping layer provides the major part of the ball'"'"'s strength.
-
Citations
12 Claims
-
1. A ball sealer for seating against high flow perforations in oil well casing during fluid injection, comprising:
-
a spherical core which forms a suitable base on which to wrap a filament; and a layer of thermosetting filament wrapping outside the core which is sufficiently thick to give the ball sealer the strength necessary to withstand the pressure differential across a perforation in oil well casing during fluid injection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A system for injecting fluids into a formation surrounding an oil well with an even distribution, comprising:
-
a casing which includes a plurality of perforations; means for pumping fluids into the casing; and a plurality of ball sealers which are pumped into the casing with the fluids, a substantial number of which seat against the casing perforations through which the highest flow rate is passing, each ball sealer including; a spherical core which forms a suitable base on which to wrap a filament; and a layer of thermosetting filament wrapping outside the core which is sufficiently thick to give the ball sealer the strength necessary to withstand the pressure differential across a perforation in oil well casing during fluid injection. - View Dependent Claims (11)
-
-
12. A ball sealer for seating against high flow perforations in oil well casing during fluid injection, comprising:
-
a spherical core which forms a suitable base on which to wrap a filament; a layer of graphite-carbon impregnated thermosetting filament wrapping outside the core which is sufficiently thick to give the ball sealer the strength necessary to withstand the pressure differential across a perforation in oil well casing during fluid injection; an adhesive binder included in the wrapping layer; a layer of resinous polymer outside the wrapping layer; and an elastomeric layer outside the layer of resinous polymer.
-
Specification