Linear and vibrational impact generating combination tool with adjustable eccentric drive

  • US 9,869,129 B2
  • Filed: 04/07/2016
  • Issued: 01/16/2018
  • Est. Priority Date: 04/07/2016
  • Status: Active Grant
First Claim
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1. A method of directional drilling through shale with coil tubing, comprising:

  • attaching a combination impact tool, said combination impact tool attached to a drilling tool, to one end of a length of coil tubing which is wound around a drum to form a drilling combination;

    drilling a non-vertical well-bore in shale by providing linear and vibrational impacts to the drilling equipment through the tool, wherein both the linear hammering impacts and vibrational impacts are generated by pressurized fluid flowing through the combination impact tool, whereinflow of pressurized fluid through an upper section of the combination impact tool causes a hammer bit to generate linear hammering impacts, and wherein frequency of said linear hammering impacts is controlled by varying pressure of the pressurized fluid flowing through the upper section, andflow of pressurized fluid through a lower section of said tool induces an eccentric arm included in the lower section to rotate and cause vibrational impacts, wherein the eccentric arm includes slots for weights to be added to it and wherein the frequency and amplitude of said vibrational impacts can be controlled by varying weight of the eccentric arm and by varying pressure of the pressurized fluid flowing through the lower section.

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