Abstract: A movable sleeve is actuated to cover eductor outlet ports in the event of loss of through flow. The eductor reduces pressure in the tool on one side of the sleeve as compared to hydrostatic on another side of the sleeve so that the sleeve is urged to move in an uphole or downhole direction to cover the eductor outlet ports. This movement reverses circulation direction through the housings in an effort to push debris off a clogged screen with reverse flow. To return the sleeve to its initial position the inlet to the device is inserted into debris and the surface pumps are started to create an unbalanced force on the sleeve to move it back to the original position free of the eductor outlet ports. The sleeve configuration can be reversed so that low pressure from a flow blockage urges the sleeve down to close the eductor ports.

Abstract: A debris collection device creates circulation with surface pumped fluid that draws debris laden flow into a long tail pipe. The tail pipe advances as debris is sucked out of the way and into the tailpipe. A shoe with a check valve at the tailpipe lower end prevents debris exit from the tailpipe either when the surface pump is turned off or when the tailpipe is removed with the tool to get the debris out of the borehole. The device handles horizontal runs where debris such as sand accumulates on the borehole bottom. Additional stands are added above the debris collection device as the tailpipe penetrates deeper into the borehole as sand that lies ahead of it is removed into the tailpipe. A volume of sand extending into the thousands of gallons can be removed in a single trip.

Abstract: A movable sleeve is actuated to cover eductor outlet ports in the event of loss of through flow. The eductor reduces pressure in the tool on one side of the sleeve as compared to hydrostatic on another side of the sleeve so that the sleeve is urged to move in an uphole or downhole direction to cover the eductor outlet ports. This movement reverses circulation direction through the housings in an effort to push debris off a clogged screen with reverse flow. To return the sleeve to its initial position the inlet to the device is inserted into debris and the surface pumps are started to create an unbalanced force on the sleeve to move it back to the original position free of the eductor outlet ports. The sleeve configuration can be reversed so that low pressure from a flow blockage urges the sleeve down to close the eductor ports.

Abstract: A debris collection device creates circulation with surface pumped fluid that draws debris laden flow into a long tail pipe. The tail pipe advances as debris is sucked out of the way and into the tailpipe. A shoe with a check valve at the tailpipe lower end prevents debris exit from the tailpipe either when the surface pump is turned off or when the tailpipe is removed with the tool to get the debris out of the borehole. The device handles horizontal runs where debris such as sand accumulates on the borehole bottom. Additional stands are added above the debris collection device as the tailpipe penetrates deeper into the borehole as sand that lies ahead of it is removed into the tailpipe. A volume of sand extending into the thousands of gallons can be removed in a single trip.