TOP SURFACE DRILLING DEVICE AND METHODS FOR DRILLING A CORE IN A TOP SURFACE

• US 20160281433A1
• Filed: 03/23/2016
• Published: 09/29/2016
• Est. Priority Date: 03/27/2015
• Status: Active Grant

• Current Assignee: Tracto-Tecknik GmbH & Company KG
• Original Assignee: Tracto-Tecknik GmbH & Company KG
• Inventors: KOCH, Elmar, HANSES, Andreas Joachim, FISCHER, Sebastian, KPER, Martin
• Granted Patent: US 10,443,311 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: E21B 10/02 Core bits characterised by wear resisting parts E21B10/48
• CPC Class Codes: E21B 10/64 characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
• CPC Class Codes: E21B 4/006 Mechanical motion converting means, e.g. reduction gearings E21B4/10 takes precedence
• CPC Class Codes: E21B 7/002 Drilling with diversely driven shafts extending into the borehole ⁠ E21B7/001 takes precedence
• CPC Class Codes: E21B 7/046 horizontal drilling drilling with mechanical conveying means E21B7/003

Abstract

A top surface drilling device has a core bit and a drill head disposed in the core bit. The drill head has a smaller diameter than that of the core bit, and the core bit and the drill head can be driven at different angular speeds.

Claims

1-26. -26. (canceled)

27. A top surface drilling device, comprising:

a core bit; and

a drill head disposed in the core bit, the drill head having a smaller diameter than a diameter of the core bit;

wherein the core bit and the drill head can be driven simultaneously at different angular speeds.

28. The top surface drilling device according to claim 27, wherein the drill head is in the form of a second core bit.

29. The top surface drilling device according to claim 27, wherein a ratio of an external diameter of the core bit to an external diameter of the drill head is in the range of approximately 2 to 15.

30. The top surface drilling device according to claim 27, further comprising a gear mechanism, the gear mechanism being configured to be operably connected to a drive and operably disposed between the drive and the core bit and the drill head, the gear mechanism being operably connected to the core bit and the drill head for driving the core bit and the drill head.

31. The top surface drilling device according to claim 30, wherein the gear mechanism is a planetary gearing.

32. The top surface drilling device according to claim 31, wherein the planetary gearing has a stationary ring gear and at least one planetary gear, configured to be driven by the drive.

33. The top surface drilling device according to claim 32, wherein the planetary gearing further comprises a sun gear connected to the drill head and configured to be connected to the drive, wherein the planetary gear can be indirectly driven by the drive via the sun gear.

34. The top surface drilling device according to claim 31, wherein the planetary gearing has a ring gear and at least one stationary planetary gear, the stationary planetary gear configured to be driven by the drive.

35. The top surface drilling device according to claim 27, wherein the core bit and the drill head can be driven with different rotation directions.

36. The top surface drilling device according to claim 27, further comprising, for each one of the at least one planetary gear, a drive.

37. A method for drilling a core in a top surface for the creation of a cavity, comprising:

drilling with a core bit at a first angular speed; and

simultaneously with the drilling with the core bit, drilling with a drill head of smaller diameter than the core bit, at a second angular speed different from the first angular speed.

38. The method according to claim 37, wherein the drilling with the core bit and the drilling with the drill head are performed in different rotation directions.

39. A top surface drilling device, comprising:

a core bit;

a drill head disposed in and concentric with the core bit, the drill head having

a smaller diameter than a diameter of the core bit;

a planetary gearing comprising a sun gear, a ring gear and one or more planetary gears, the sun gear and the ring gear engaging with the one or more planetary gears, the sun gear operatively connected to the drill head, and the one or more planetary gears operatively connected to the core bit.

40. The top surface drilling device according to claim 39, wherein the core bit is in the form of a hollow chisel.

41. The top surface drilling device according to claim 39, further comprising a housing, the ring gear mounted stationary in the housing.

42. The top surface drilling device according to claim 39, further comprising a connection piece connected to the sun gear, the connection piece and the sun gear formed as a hollow shaft.

43. The top surface drilling device according to claim 42, wherein the drill head is in the form of a second core bit.