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US 2016/0108674 A1Published application
Hammer drill
AssigneeAshmin, LC
InventorsGunther HH von Gynz-Rekowski, Michael V. Williams, Russell Koenig
Life of this patent
Estimating the term…
Abstract
A downhole apparatus connected to a workstring within a wellbore. The workstring is connected to a bit member. The apparatus includes a mandrel operatively connected to a downhole motor mechanism, an anvil member operatively formed on the bit member, the anvil member being operatively connected to the mandrel, a radial bearing housing unit operatively connected to the workstring, with the radial bearing housing unit being disposed about the mandrel, and a hammer member slidably attached to the radial bearing housing unit.
Claims47
An apparatus for generating an axial impact, comprising:
- a hammer segment having a radial cam surface;
- an anvil segment having an internal radial shoulder, an inner wall extending from the internal radial shoulder, and one or more partial cavities adjacent to the internal radial shoulder in an internal space within the inner wall of the anvil segment;
- one or more rolling elements partially disposed within the partial cavities of the anvil segment, wherein the rolling elements cooperate with the radial cam surface of the hammer segment for axially displacing the hammer segment from the anvil segment and generating the axial impact upon rotation of the hammer segment or the anvil segment, wherein each rolling element moves 360 degrees relative to the hammer segment.
An apparatus for generating an axial impact, comprising:
- an anvil segment having a radial cam surface;
- a hammer segment having an internal radial shoulder, an inner wall extending from the internal radial shoulder, and one or more partial cavities adjacent to the internal radial shoulder in an internal space within the inner wall of the hammer segment;
- one or more rolling elements partially disposed within the partial cavities of the hammer segment, wherein the rolling elements cooperate with the radial cam surface of the anvil segment for axially displacing the anvil segment from the hammer segment and generating the axial impact upon rotation of the hammer segment or the anvil segment, wherein each rolling element moves 360 degrees relative to the anvil segment.
A downhole apparatus connected to a workstring within a wellbore, said workstring being connected to a bit member having a motor means comprising:
- a power mandrel operatively connected to the motor means;
- an anvil member operatively formed on the bit member, said anvil member being operatively connected to said power mandrel, said anvil member including an internal radial shoulder, an inner wall extending from the internal radial shoulder, and one or more partial cavities adjacent to the internal radial shoulder in an internal space;
- one or more rolling elements partially disposed within the partial cavities of the anvil member;
- a radial bearing housing unit operatively connected to the workstring, with the radial bearing housing unit being disposed about said power mandrel;
- a spring saddle operatively attached to the radial bearing housing unit;
- a spring spacer disposed about said spring saddle;
- a spring having a first end and a second end, with the first end abutting the spring saddle;
- a hammer member slidably attached to said spring saddle and abutting the second end of the spring, the hammer member including a radial cam surface that cooperates with the rolling elements disposed in the anvil member for axially displacing the hammer member from the anvil member and generating an axial impact upon rotation of the anvil member.
5 more elements
A downhole apparatus connected to a workstring within a wellbore, said workstring being connected to a bit member with a motor means comprising:
- a power mandrel operatively connected to the motor means;
- an anvil member operatively formed on the bit member, said anvil member being operatively connected to said power mandrel, said anvil member including an internal radial shoulder, an inner wall extending from the internal radial shoulder, and one or more partial cavities adjacent to the internal radial shoulder in an internal space;
- one or more rolling elements partially disposed within the partial cavities of the anvil member;
- a radial bearing housing unit operatively connected to the workstring, with the radial bearing housing unit being disposed about said power mandrel;
- a hammer member slidably attached to said radial bearing housing unit, the hammer member including a radial cam surface that cooperates with the rolling elements disposed in the anvil member for axially displacing the hammer member from the anvil member and generating an axial impact upon rotation of the anvil member.
2 more elements
A method for drilling a wellbore with a workstring, comprising:
- a) providing a downhole apparatus connected to the workstring within the wellbore, said apparatus being connected to a bit member, the downhole apparatus comprising:
- a power mandrel operatively connected to a motor means;
- an anvil member with a radial cam surface operatively formed on the bit member, said anvil member being operatively connected to said power mandrel, said anvil member including an internal radial shoulder, an inner wall extending from the internal radial shoulder, and one or more partial cavities adjacent to the internal radial shoulder in an internal space;
- one or more rolling elements partially disposed within the partial cavities of the anvil member;
- a radial bearing housing unit operatively connected to the workstring, with the radial bearing housing unit being disposed about said power mandrel;
- a spring saddle operatively attached to the radial bearing housing unit;
- a spring spacer disposed about said spring saddle, a spring having a first end and a second end, with the first end abutting the spring saddle;
- a hammer member with a radial cam surface slidably attached to said spring saddle and abutting the second end of the spring, the hammer member including a radial cam surface;
- b) lowering the workstring into the wellbore;
- c) contacting the bit member with a reservoir interface;
- d) engaging a distal end of said power mandrel with a surface of said bit member;
- e) slidably moving the anvil member;
- f) engaging the radial cam surface of the hammer member with the rolling elements disposed in the anvil member to axially displace the hammer member from the anvil member and to generate an axial impact upon rotation of the anvil member, thereby imparting an impact force on the bit member.
10 more elements
Dependencies are inferred from the claim text.