IP Library › Granted Patent US 6,929,068
Granted Patent B2
US 6,929,068 · App. 10/315,734 · Granted Aug 16, 2005

Non-cryogenic production of nitrogen for on-site injection in well clean out

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Quick Facts
Patent No.
US 6,929,068
App. No.
10/315,734
Granted
Aug 16, 2005
Kind
B2
Abstract

The present invention generally relates to a well servicing system for cleaning out of a well in which a compressed inert gas, produced by the non-cryogenic separation of air is delivered to the region of the well where particulate matter has collected that inhibits the ability of the well to produce.

Claims (8)

1. A method for servicing a wellbore, comprising:

separating at least a substantial portion of oxygen contained within a fluid feed stream to produce a substantially inert gas and a fluid byproduct, wherein oxygen is removed by passing the fluid feed stream through a membrane which preferentially separates the inert gas from the other components in the fluid feed stream;

increasing the pressure of the substantially inert gas; and

passing the substantially inert gas through a perforated screen disposed in an isolated annular area of the wellbore to supply the substantially inert gas to the wellbore.

2. The method of claim 1 , wherein the substantially inert rich gas is nitrogen rich gas.

3. The method of claim 1 , further including pumping the substantially inert gas through a coil tubing assembly.

4. The method claim 1 , wherein an additive is combined with the inert rich gas.

5. The method of claim 1 , wherein the pressure of the substantially inert gas is boosted to at least 1000 psig.

Assignments (12)
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 →
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 →
RELEASE OF SECURITY INTEREST Recorded Dec 18, 2019
From: CITIBANK, N.A.
To: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
Reel/Frame 051325/0053 →
TERMINATION AND RELEASE OF SECOND LIEN SECURITY INTEREST IN UNITED STATES PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (049677/0904) Recorded Dec 13, 2019
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
Reel/Frame 051285/0769 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 23, 2019
From: WEATHERFORD/LAMB, INC.
To: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
Reel/Frame 049827/0769 →
SECURITY INTEREST Recorded Jul 8, 2019
From: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
To: CITIBANK, N.A.
Reel/Frame 049691/0137 →
CONFIRMATORY GRANT OF SECOND LIEN SECURITY INTEREST IN UNITED STATES PATENTS Recorded Jul 3, 2019
From: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 049677/0904 →
TERMINATION AND RELEASE OF SECURITY INTEREST IN UNITED STATES PATENTS Recorded Jul 3, 2019
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: WEATHERFORD/LAMB, INC.
Reel/Frame 049679/0095 →
SECURITY INTEREST Recorded Jun 8, 2016
From: WEATHERFORD/LAMB, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 038848/0819 →