Repeatedly pressure operated ported sub with multiple ball catcher
A ball seat is integrated with a movable biased sleeve. Sleeve movement against its bias moves a diverter from a position outside the through passage to a position across the main passage such that any balls that drop down will be directed by the diverter into an annular retention volume. In treatment of the formation for fluid loss the movement of a seat with the seated ball opens lateral ports for delivery of sealing material and moves the diverter. Smaller balls are then introduced to close lateral ports above the seated ball so pressure can be built to shift the sleeve and extrude the first ball. Once the seated ball blows through, the smaller balls come through the seat and are all diverted to an annular capture volume. The device is resettable for multiple operations. Fluid flow cessation closes lateral ports and opens a through passage retracting the diverter.
1. A ported sub for a borehole tubular string, comprising:
a housing comprising at least one wall opening and a passage therethrough in flow communication with said wall opening, said passage comprising a selectively opened lateral exit to a surrounding capture volume in said housing;
a valve member for selective opening and closing of said at least one wall opening, said valve member operably connected to said lateral exit to direct at least one initial object to said surrounding capture volume; and
wherein movement of said valve member in tandem with said initial object pivots a diverter into said passage to open access to said capture volume through said lateral exit.
2. The sub of claim 1 , wherein:
said valve member operates the diverter between a retracted position from said passage and an extended position into said passage, said extended position defining said opened lateral exit to said capture volume.
3. The sub of claim 1 , wherein:
said valve member is biased toward blocking said at least one wall opening.
4. The sub of claim 1 , wherein:
said valve member has an axial opening surrounded by a seat to accept said at least one initial object for selective blocking of said passage while moving said valve member with pressure held by said initial object on said seat to said open position of said at least one wall opening.
5. The sub of claim 4 , wherein:
movement of said valve member in tandem with said initial object opens said at least one wall opening.
6. The sub of claim 4 , wherein:
movement of said valve member in tandem with said initial object compresses a return spring.
7. The sub of claim 4 , further comprising:
at least one additional object adapted to block said at least one wall opening to allow further pressure on said initial object on said seat to pass the initial object through said seat to said diverter for capture in said capture volume.
8. The sub of claim 7 , wherein:
said at least one additional object passing through said seat and onto said diverter for capture in said capture volume.
9. The sub of claim 8 , wherein:
said valve member biased in a direction to close said at least one wall opening while moving away from said diverter;
wherein a change of fluid flow through said seat after said initial object passes therethrough allows said diverter to move out of said passage.
10. The sub of claim 9 , wherein:
said diverter is pivotally mounted to a pin with a torsion spring on said pin to bias said diverter out of said passage.
11. The sub of claim 9 , wherein:
movement of said valve member in said direction to close said at least one portion is delayed to allow said at least one additional object or fluid flow time to engage said diverter.
12. The sub of claim 11 , wherein:
said delay is accomplished by a restrictive fit of at least a part of said valve member with said housing or by said valve member displacing fluid through a restriction.
13. The sub of claim 7 , wherein:
said at least one additional object is smaller than said at least one initial object.
14. The sub of claim 1 , wherein:
said valve member has an axial opening to conduct flow through said passage.
15. The sub of claim 1 , wherein:
said valve member is movable to open and close said at least one wall opening multiple times.