Sand plunger
A plunger mechanism comprising radial peripheral holes extending outwardly from a center core to an outer surface through which a downhole gas may pass to clear an obstruction on the outer surface of the plunger, thereby enabling a self-cleaning action.
1. A plunger apparatus for use in a hydrocarbon well having a sand content, said plunger comprising:
a body having a top end and a bottom end;
said bottom end in fluid communication with a hollow core extending the longitudinal length of said body;
a plurality of exit holes extending radially and outwardly from a substantial portion of said hollow core's length to a peripheral surface of said body; and
one or more of said plurality of exit holes capable of permitting a downhole gas flowing through said hollow core to clear an accumulation comprising sand from at least a portion of said peripheral surface.
2. The plunger of claim 1 , wherein said peripheral surface further comprises one or more solid rings, shifting rings, pads, or bristles.
3. The plunger of claim 1 , wherein said one or more exit holes are positionable between a pair of solid rings.
4. The plunger of claim 1 , wherein said top end further comprises a fish neck.
5. The plunger of claim 1 , wherein said one or more of said exit holes form an angle of about 90° from an inner wall of said hollow core.
6. The plunger of claim 1 , wherein said longitudinal body is capable of being formed as an integral one-piece unit.
7. The plunger of claim 1 , wherein one or more of said plurality of exit holes are positionable at a top portion of said longitudinal body, said top portion holes further comprising a downward slant from an inner wall of said hollow core toward said peripheral surface.
8. The plunger of claim 1 , wherein one or more of said plurality of exit holes are positionable at a lower portion of said longitudinal body, said lower portion holes further comprising an upward slant from an inner wall of said hollow core toward said peripheral surface.
9. The plunger of claim 7 , wherein one or more of said plurality of exit holes are positionable at a lower portion of said longitudinal body, said lower portion holes further comprising an upward slant from said inner wall of said hollow core toward said peripheral surface.
10. A method of clearing downhole accumulations from a plunger, the method comprising the steps of:
providing a plunger comprising a mandrel having an upper end, a lower end, and a fluid channel extending the longitudinal length of said mandrel,
said fluid channel in communication with one or more holes extending radially and outwardly from a substantial portion of said channel length and to a peripheral surface of said plunger;
positioning said plunger in a well tubing;
allowing said plunger to ascend in said well tubing and carry liquids and downhole accumulations to a well top;
allowing a downhole gas to flow through said fluid channel portion and said one or more holes to clear said downhole accumulations from at least a portion of said peripheral surface of said plunger.