IP Library › Patent Application 15678528
Patent Application
App. No. 15/678,528

METHOD AND APPARATUS FOR REAMING WELL BORE SURFACES NEARER THE CENTER OF DRIFT

Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US None
App. No.
15/678,528
Abstract

A well bore reaming device and method are disclosed. The device includes a drill string, a bottom eccentric reamer coupled to the drill string, and a top eccentric reamer coupled to the drill string, wherein the bottom and top eccentric reamers have a prearranged spacing and orientation.

Claims (31)

1 . A well bore reaming device, comprising:

a drill string;

a bit coupled to the drill string;

a bottom hole assembly coupled to the drill string;

a bottom eccentric reamer coupled to the drill string; and

a top eccentric reamer coupled to the drill string;

wherein the bottom and top eccentric reamers are diametrically opposed on the drill string.

2 . The well bore reaming device of claim 1 , further comprising cutting elements coupled to the top eccentric reamer and to the bottom eccentric reamer.

3 . The well bore reaming device of claim 2 , wherein the cutting elements of the bottom eccentric reamer have a prearranged orientation with respect to the orientation of the cutting elements coupled to the top eccentric reamer.

4 . The well bore reaming device of claim 2 , wherein each eccentric reamer comprises multiple sets of cutting elements.

5 . The well bore reaming device of claim 4 , wherein each set of cutting elements are arranged along a spiral path along the surface of each eccentric reamer.

6 . The well bore reaming device of claim 4 , further comprising a flow area adjacent to each set of cutting elements.

7 . The well bore reaming device of claim 1 , wherein the bottom eccentric reamer and the top eccentric reamer are spaced at a prearranged position.

8 . The well bore reaming device of claim 1 , wherein the outermost radius of the bottom and top eccentric reamers is less than the innermost radius of the well bore and casing.

9 . The well bore reaming device of claim 1 , wherein the bottom eccentric reamer is identical to the top eccentric reamer.

10 . A method of reaming a well bore, comprising:

providing a drill string;

providing drill bit coupled to the drill string;

providing a bottom hole assembly coupled to the drill string;

providing bottom eccentric reamer coupled to the drill string;

providing top eccentric reamer coupled to the drill string;

positioning the top and bottom eccentric reamers at diametrically opposed positions on the drill string; and

rotating the drill string in the well bore.

11 . The method of claim 10 , further comprising coupling cutting elements to the top eccentric reamer and to the bottom eccentric reamer.

12 . The method of claim 11 , wherein the cutting elements coupled to the bottom eccentric reamer have a prearranged orientation with respect to the orientation of the cutting elements coupled to the top eccentric reamer.

13 . The method of claim 11 , further comprising providing each eccentric reamer with multiple sets of cutting elements.

14 . The method of claim 13 , further comprising arranging each set of cutting elements along a spiral path along the surface of each eccentric reamer.

15 . The method of claim 13 , further comprising providing a flow area adjacent to each set of cutting elements.

16 . The method of claim 10 , further comprising spacing the bottom eccentric reamer and the top eccentric reamer at a prearranged spacing and orientation.

17 . The method of claim 10 , wherein the outermost radius of the bottom and top eccentric reamers is less than the innermost radius of the well bore and casing.

18 . The method of claim 10 , wherein the first eccentric reamer is identical to the second eccentric reamer.