Loading of wellbores with explosives

Details Loading of wellbores with explosives Loading of wellbores with explosives

1981-08-05

1983-04-26

Sebastian, Leland A.

Ammunition and explosive-charge making

Loading fireworks and bursting charges

Placing bursting charge in projectile

102313, C06D 108, F42B 300

Patent

active

043809480

ABSTRACT:
Bags of explosive are loaded rapidly into deep wellbores by suspending a rigid positioning tube partway into the wellbore, and loading the bags into the tube, the bags being prevented from dropping through the open bottom end of the tube by a cord attached to the lowermost bag and secured at the upper end of the tube when the tube-suspending cable is in tension by a cord-securing/releasing means, e.g., a pivotable bar having a hook on one end. When the bag-laden tube is lowered to the bottom of the wellbore, or to a column of bags previously placed therein, the tension on the cable is relaxed and the cord is released, allowing the positioning tube thereafter to be raised to the surface for re-use, leaving the cord and bags in the wellbore. Freedom of the bag-supporting cord to move with respect to the positioning tube when the latter is raised to the surface is assured by threading the cord through plastic tubing mounted to the wall of the positioning tube and releasable therefrom for re-use.

REFERENCES:
patent: 2920523 (1957-06-01), Barco et al.
patent: 3148590 (1964-09-01), Brown
patent: 3986430 (1976-10-01), Coursen et al.

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