IP Library Granted Patent US 7,513,304
Granted Patent B2
US 7,513,304 · App. 10/557,573 · Granted Apr 7, 2009

Method for drilling with improved fluid collection pattern

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Quick Facts
Patent No.
US 7,513,304
App. No.
10/557,573
Granted
Apr 7, 2009
Kind
B2
Abstract

A method for improving underground fluid collection and removal. The method includes drilling one well with a vertical section and a horizontal section having main bores and branches. All of the branches are substantially in one horizontal plane except one branch for each main bore. That one branch for each main bore is slope downward towards a common place, where a second vertical well is drilled for collecting fluid. A system resulting from the method is also claimed.

Claims (58)

1. A method for collecting and removing fluid from underground deposits, the method comprising:

drilling a first, substantially vertical well;

drilling a substantially horizontal well with at least one main bore from the first substantially vertical well;

drilling a plurality of branches in the horizontal plane from a main bore;

drilling a second, substantially vertical well deeper than all the main bores and branches of the horizontal well; and

drilling a C-branch from the main bore towards the second well,

wherein the C-branch bypasses the second well at a minimum distance d.

2. The method in claim 1 , wherein the minimum distance d ranges 1 inch to 100 feet.

3. The method in claim 1 , further comprising:

removing fluid from the second well.

4. The method in claim 3 , wherein the fluid removed from the second well is water or gas.

5. The method in claim 1 , wherein the distance between the first well and the second well ranges from 300 feet to 4000 feet.

6. A method for collecting and removing fluid from underground fluid deposits, the method comprising:

drilling a first, substantially vertical well;

drilling a substantially horizontal well with at least one main bore from the first substantially vertical well;

drilling a plurality of branches in the substantially horizontal plane from the main bore;

drilling a second, substantially vertical well at the vicinity of the main bore or a branch, wherein the minimum distance between the second well and the branch or the main bore is about 1 inch to about 100 feet, wherein the bottom of the second well is deeper than all the main bores and branches.

7. The method in claim 6 , wherein the horizontal distance between the second well and the vertical section of the first well ranges from 300 feet to 4000 feet.

8. The method in claim 6 , farther comprising:

fracturing the strata between the second well, and the branch or the main bore.

9. A well system for underground fluid collection and removal, the system comprising:

a first well having a substantially vertical section and a substantially horizontal section;

wherein the substantially horizontal section comprises at least one main bore and a plurality of branches;

wherein the main bore further has a C-branch;

a second well having a substantially vertical section wherein the bottom of the second well is lower than any main bores or branches;

wherein the C-branch inclines downward towards the second well and terminates at the vicinity of the second well.

10. The well system in claim 9 , wherein the C-branch connects to the second well.

11. The well system in claim 9 , wherein the minimum distance d between the C-branch and the second well is greater than zero.

12. The well system in claim 11 , wherein the minimum distance d ranges from 1 inch to 100 feet.

13. The well system in claim 9 , wherein the first well and the second well are in a coal field, and wherein substantially all main bores and branches of the horizontal section are in a coal seam except the C-branch.

14. The well in claim 9 , wherein the horizontal distance between the vertical section of the first well and the second well ranges from 300 ft to 4000 ft.

15. The well system in claim 9 , further comprising:

a third well having a substantially vertical section and a substantially horizontal section;

wherein the substantially horizontal section comprising at least one main bore and a plurality of branches;

wherein the main bore further has a second C-branch;

wherein the second C-branch inclines downward towards the second well and terminates at the vicinity of the second well.

16. The well system in claim 15 , wherein the first well, the second well and the third well are in a coal field, and wherein substantially all main bores and branches of the horizontal section are in a coal seam except the C-branch and the second C-branch.

17. The well in claim 15 , wherein the horizontal distance between the vertical section of the third well and the second well ranges from 300 ft to 4000 ft.

18. A method for collecting and removing fluid from underground deposits, the method comprising:

drilling a first, substantially vertical well;

drilling a substantially horizontal well with at least one main bore from the first substantially vertical well;

drilling a plurality of branches in the horizontal plane from a main bore;

drilling a second, substantially vertical well deeper than all the main bores and branches of the horizontal well; and

drilling a C-branch from the main bore towards the second well,

wherein the C-branch intersects the second well.

19. The method in claim 18 , wherein the distance between the first well and the second well ranges from about 300 feet to about 4000 feet.

20. The method in claim 18 , further comprising removing fluid from the second well.

21. The method in claim 20 , wherein the fluid removed from the second well is water or gas.

22. A method for collecting and removing fluid from underground deposits, the method comprising:

drilling a first, substantially vertical well;

drilling a substantially horizontal well with at least one main bore from the first substantially vertical well;

drilling a plurality of branches in the horizontal plane from a main bore;

drilling a second, substantially vertical well deeper than all the main bores and branches of the horizontal well; and

drilling a C-branch from the main bore towards the second well,

wherein the C-branch terminates at a distance d from the second well.

23. The method in claim 22 , farther comprising removing fluid from the second well.

24. The method in claim 23 , wherein the fluid removed from the second well is water or gas.

25. The method in claim 20 , wherein the distance between the first well and the second well ranges from about 300 feet to about 4000 feet.

Assignments (6)
PATENT SECURITY INTEREST ASSIGNMENT AGREEMENT Recorded Apr 26, 2023
From: DEUTSCHE BANK TRUST COMPANY AMERICAS
To: WELLS FARGO BANK, NATIONAL ASSOCIATION
Reel/Frame 063470/0629 →
RELEASE OF SECURITY INTEREST Recorded Aug 28, 2020
From: WELLS FARGO BANK, NATIONAL ASSOCIATION
To: WEATHERFORD TECHNOLOGY HOLDINGS, LLC; WEATHERFORD NETHERLANDS B.V.; WEATHERFORD NORGE AS; HIGH PRESSURE INTEGRITY, INC.; PRECISION ENERGY SERVICES, INC.; WEATHERFORD CANADA LTD.; WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH; PRECISION ENERGY SERVICES ULC; WEATHERFORD U.K. LIMITED
Reel/Frame 053838/0323 →
SECURITY INTEREST Recorded Aug 28, 2020
From: WEATHERFORD TECHNOLOGY HOLDINGS, LLC; WEATHERFORD NETHERLANDS B.V.; WEATHERFORD NORGE AS; HIGH PRESSURE INTEGRITY, INC.; PRECISION ENERGY SERVICES, INC.; WEATHERFORD CANADA LTD.; WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH; PRECISION ENERGY SERVICES ULC; WEATHERFORD U.K. LIMITED
To: WILMINGTON TRUST, NATIONAL ASSOCIATION
Reel/Frame 054288/0302 →
SECURITY INTEREST Recorded Dec 26, 2019
From: WEATHERFORD TECHNOLOGY HOLDINGS, LLC; WEATHERFORD NETHERLANDS B.V.; WEATHERFORD NORGE AS; HIGH PRESSURE INTEGRITY, INC.; PRECISION ENERGY SERVICES, INC.; WEATHERFORD CANADA LTD.; WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH; PRECISION ENERGY SERVICES ULC; WEATHERFORD U.K. LIMITED
To: DEUTSCHE BANK TRUST COMPANY AMERICAS, AS ADMINISTRATIVE AGENT
Reel/Frame 051419/0140 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 23, 2019
From: WEATHERFORD CANADA PARTNERSHIP
To: WEATHERFORD CANADA LTD.
Reel/Frame 051352/0508 →
SECURITY INTEREST Recorded Dec 18, 2019
From: WEATHERFORD TECHNOLOGY HOLDINGS LLC; WEATHERFORD NETHERLANDS B.V.; WEATHERFORD NORGE AS; HIGH PRESSURE INTEGRITY INC.; PRECISION ENERGY SERVICES INC.; WEATHERFORD CANADA LTD.; WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH; PRECISION ENERGY SERVICES ULC; WEATHERFORD U.K. LIMITED
To: WELLS FARGO BANK NATIONAL ASSOCIATION AS AGENT
Reel/Frame 051891/0089 →