Displaceable plug in a tool string filter
View Patent ↗A filter for a drill string comprises a perforated receptacle having an upper end and a lower end. The upper end of the filter comprises a drilling mud intake, and the lower end of the filter comprises an opening. A displaceable plug is seated on the opening at the lower end.
1. A filter for a drill string, the filter comprising:
a receptacle having an inner surface, an outer surface, and perforations providing a through passage between said inner surface and said outer surface, said receptacle having an upper end and a lower end;
a drilling mud intake disposed at said upper end;
a port disposed at said lower end; and
a ball disposed at said port, said ball adapted to be displaced in an upward direction from a first location wherein said ball obstructs said port to a second location wherein said ball is spaced from said port.
2. The filter of claim 1 , wherein said receptacle is a substantially conical shape.
3. The filter of claim 1 , wherein said receptacle is disposed within a saver sub.
4. The filter of claim 1 , wherein perforations include circle-shaped perforations.
5. The filter of claim 1 , wherein said perforations include square-shaped perforations.
6. The filter of claim 1 , wherein said receptacle includes a plurality of supporting rods and a wire wrapped about said plurality of supporting rods, said wire forming said inner surface and said outer surface.
7. The filter of claim 1 , wherein said ball seats within said lower end of said receptacle.
8. A filter for a drill string, the filter comprising:
a receptacle having an inner surface, an outer surface, and perforations providing a through passage between said inner surface and said outer surface, said receptacle having an upper end and a lower end;
a drilling mud intake disposed at said upper end;
a port disposed at said lower end; and
a plug disposed at said port, said plug adapted to be displaced in an upward direction from a first location wherein said plug obstructs said port to a second location wherein said plug is spaced from said port;
a shaft having a first end connected to said plug and a second end extending toward said upper end; and
a spider connected to said upper end and to said second end.
9. The filter of claim 8 , wherein said plug is a disc.
10. The filter of claim 8 , wherein said plug includes a seal.
11. The filter of claim 8 , wherein said plug seats within said inner surface at said lower end of said receptacle.
12. The filter of claim 8 , the filter further comprising:
a fastener fastened to the exterior surface of said receptacle at said lower end, said fastener adapted to provide a seat for said plug and further adapted to be removable from said receptacle.
13. The filter of claim 8 , wherein said exterior surface includes threads and said fastener is adapted to threadably fasten to said lower end of said receptacle.
14. The filter of claim 8 , wherein said shaft includes bristles expending outward toward the inner surface of said receptacle.