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Drainhold drilling

  • US 4,476,945 A
  • Filed: 02/10/1983
  • Issued: 10/16/1984
  • Est. Priority Date: 02/10/1983
  • Status: Expired due to Fees
First Claim
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1. Apparatus for employing a coiled hose into a primary wellbore and for recovering said hose from said wellbore in a coiled manner comprising a base means, a support means carried by said base means, a drum means for carrying said hose in a coiled manner, said drum means being rotatably supported by said support means, a rigid beam pivotally carried by said support means and extending away from said drum means so that said hose passes to or from said drum means along said beam, a guide means fixed to the end of said beam furthest from said drum means for guiding said hose from said furthest end of said beam down into said primary wellbore or out of said primary wellbore up to said beam, said hose when being employed or received being under tension and said beam supporting said hose being under compression, at least one of said beam and guide means carrying means adapted to be supported by a well drilling derrick so that when employing or receiving said hose the tension force in said hose is essentially matched by the compression force in said beam and essentially only vertical external forces are applied to said apparatus with the result that essentially no lateral external forces are applied to said base means thereby eliminating the need to rigidly fix said base means to the earth or other support means when said apparatus is in use.

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