NEW TECHNIQUES IN FOAM DRILLING

TO OBTAIN SUBSURFACE SOIL INFORMATION, THE EQUIPMENT USED WAS A SMALL DIAMETER 3.5 INCH BIT ON A HALCO 325 HAMMERDRILL OPERATED FROM OUR MOBILE DRILL MODEL B-50. THE ROTATION RATE WAS 10 TO 12 R.P.M. AND THE THRUST PRESSURE WAS 150 TO 200 LBS. COMPRESSED AIR AT 125 C.F.M., 80 P.S.I. WAS OBTAINED FROM A SATELLITE COMPRESSOR. A GEL FOAM DRILLING FLUID (1 PT. QUIK - FOAM, 0.5 LB QUICK TROL AND 25 LB OF QUICK-GEL IN 50 GALLONS OF WATER) WAS METERED INTO THE AIR LINE AT THE RATE OF 7 TO 10 GALLONS FOR EVERY 15 LINEAL FEET. THE GEL-FOAM MIXING PROCEDURE AND THE METHOD USED TO INJECT THE FOAM INTO THE AIR SYSTEM IS DETAILED. FLOW CHARTS ILLUSTRATE THE PROCEDURE IN WHICH A PARALLEL RECEIVER TANK FILLED WITH GEL-FOAM WAS PLACED AHEAD OF A FINE NEEDLE VALVE, AND THE SMALL METERED QUANTITY OF FLUID WAS DRAWN INTO THE MAIN AIR LINE BY A VENTURI. QUICK SHUT-OFF VALVES WERE USED AT CONNECTION TIME AS NORMAL OPERATING PROCEDURE. LIBERAL USE OF THE BALL CHECK VALVES (ONE ABOVE THE HAMMERDRILL, ONE OF EACH SIDE THE GEL-FOAM TANK) TO PROTECT EQUIPMENT IS RECOMMENDED. OTHER METHODS OF GETTING FOAM INTO THE SYSTEM ARE DESCRIBED. ADVANTAGES IN THE USE OF THIS TECHNIQUE, AND THE USE OF GEL-FOAM IN OTHER APPLICATIONS ARE DISCUSSED.

Media Info

  • Features: Figures;
  • Pagination: p. 301-6

Subject/Index Terms

Filing Info

  • Accession Number: 00230159
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 4 1973 12:00AM