US3734181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion reducing apparatus for a producing oil well or the like
Assignee: Individual
•
Filing: 1971-03-25
•
Granted: 1973-05-22
•
Expires: 1991-03-25
Abstract
Abstract The corrosion reducing apparatus for a producing oil well has the positive terminals of three substantially discharged batteries connected respectively to the pump rod, the casing head, and the casing of the oil well; and has the negative terminals of the batteries connected to a rod driven into the ground. The pump rod is provided with a split zinc jacket around the short tube between pup joints, and a latch-on bow spring around the jacket to secure the jacket to the rod for insertion into a tube in the well whereupon the bow spring engages the tube to electrically connect the rod to the tube.
Inventors
- 👤 D Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:40
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02; F; F04; F04B; F04B47/00; Y; Y10; Y10S; Y10S166/00; Y10S166/902
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
123 words
A corrosion reducing apparatus for reducing the corrosion of a producing oil well or the like, having well casing, tubing and rod member extending into the ground and exposed to ground water therein, due to eddy currents caused by the motion of the associated oil well pumping apparatus, comprising at least a pair of elements, the first of which is of a material having a high oxidation potential and the second of which is of a material having a lower oxidation potential, an electrolytic solution, means for mounting the elements in the electrolytic solution, means for electrically connecting the first element to at least one of the oil well casing, tubing and rod members, and means electrically connecting the second element to ground.
Claim 2
Dependent Claim
123 words
A corrosion reducing apparatus for reducing the corrosion of a producing oil well or the like, having well casing, tubing and rod member extending into the ground and exposed to ground water therein, due to eddy currents caused by the motion of the associated oil well pumping apparatus, comprising at least a pair of elements, the first of which is of a material having a high oxidation potential and the second of which is of a material having a lower oxidation potential, an electrolytic solution, means for mounting the elements in the electrolytic solution, means for electrically connecting the first element to at least one of the oil well casing, tubing and rod members, and means electrically connecting the second element to ground.
Claim 3
Dependent Claim
52 words
The apparatus as in claim 1 wherein a generally discharged battery, havIng positive and negative terminals, provides the elements, the electrolytic solution, and the mounting means, the positive terminal of the battery being electrically connected to one of the oil well casing, tubing and rod members and the negative terminal being grounded.
Claim 4
Dependent Claim
32 words
The apparatus as in claim 1 wherein the first element is provided as a jacket about and in both physical and electrical contact with one of said casing tubing and rod members.
Claim 5
Dependent Claim
186 words
A corrosion reducing apparatus for reducing the corrosion of a producing oil well or the like, extending into the ground and exposed to ground water therein, due to eddy currents caused by the motion of the associated oil well pumping apparatus, wherein the oil well includes a tube extending into the ground and exposed to ground water, and the pumping apparatus of the oil well includes a pumping rod centrally located in the tubing and reciprocating therein to pump the oil, comprising at least a pair of elements, the first of which is of a material having a high oxidation potential and the second of which is of a material having a lower oxidation potential, wherein the first element is a jacket surrounding the rod in electrical contact therewith; wherein the second element surrounds the jacket in electrical contact with the tubing; an electrolytic solution provided by the ground water in the oil in the tubing, means mounting the elements in the electrolytic solution, means electrically connecting the first element to a portion of the oil well, and means electrically connecting the second element to ground.
Claim 6
Dependent Claim
186 words
A corrosion reducing apparatus for reducing the corrosion of a producing oil well or the like, extending into the ground and exposed to ground water therein, due to eddy currents caused by the motion of the associated oil well pumping apparatus, wherein the oil well includes a tube extending into the ground and exposed to ground water, and the pumping apparatus of the oil well includes a pumping rod centrally located in the tubing and reciprocating therein to pump the oil, comprising at least a pair of elements, the first of which is of a material having a high oxidation potential and the second of which is of a material having a lower oxidation potential, wherein the first element is a jacket surrounding the rod in electrical contact therewith; wherein the second element surrounds the jacket in electrical contact with the tubing; an electrolytic solution provided by the ground water in the oil in the tubing, means mounting the elements in the electrolytic solution, means electrically connecting the first element to a portion of the oil well, and means electrically connecting the second element to ground.
Claim 7
Dependent Claim
46 words
The apparatus as in claim 4 wherein the jacket is split to mount around the rod, and wherein the second element is a spring which mounts around the split jacket to secure the jacket to the rod, said spring extending outwardly into engagement with the tubing.
Claim 8
Independent Claim
95 words
A method of reducing corrosion of an operating oil well having well casing tubing and rod members extending into the ground and being exposed to ground water therein, comprising the steps of: providing a pair of elements in an electrolytic solution, the first of said elements being made of a material having a higher oxidation potential than the material of the second of said elements; electrically connecting the first of said elements to at least one of the oil well casing, tubing and rod members; and electrically connecting the second of said elements to ground.
Claim 9
Independent Claim
95 words
A method of reducing corrosion of an operating oil well having well casing tubing and rod members extending into the ground and being exposed to ground water therein, comprising the steps of: providing a pair of elements in an electrolytic solution, the first of said elements being made of a material having a higher oxidation potential than the material of the second of said elements; electrically connecting the first of said elements to at least one of the oil well casing, tubing and rod members; and electrically connecting the second of said elements to ground.
Claim 10
Dependent Claim
92 words
The method of claim 6 wherein the step of providing a pair of elements in an electrolytic solution includes the step of providing a generally discharged battery including a positive and a negative terminal, and wherein the step of electrically connecting the first element includes the step of connecting at least one wire between the oil well casing, tubing or rod member and the positive terminal of the battery and the step of electrically connecting the second element includes the step of connecting a wire between the negative terminal and the ground.
Claim 11
Independent Claim
139 words
A method of reducing corrosion of an operating oil well extending into the ground and being exposed to ground water therein, due to eddy currents caused by the motion of the oil well pumping apparatus, comprising the steps of: providing a pair of elements in an electrolytic solution, the first of said elements being made of a material having a higher oxidation potential than the material of the second of said elements; electrically connecting the first of said elements to the oil well; and electrically connecting the second of said elements to ground, wherein the step of providing a pair of elements includes the step of locating a jacket of the high oxidation potential material about a reciprocating rod from the pumping apparatus, and locating a spring of the low oxidation potential material in electrical contact with a tubing.
Claim 12
Independent Claim
139 words
A method of reducing corrosion of an operating oil well extending into the ground and being exposed to ground water therein, due to eddy currents caused by the motion of the oil well pumping apparatus, comprising the steps of: providing a pair of elements in an electrolytic solution, the first of said elements being made of a material having a higher oxidation potential than the material of the second of said elements; electrically connecting the first of said elements to the oil well; and electrically connecting the second of said elements to ground, wherein the step of providing a pair of elements includes the step of locating a jacket of the high oxidation potential material about a reciprocating rod from the pumping apparatus, and locating a spring of the low oxidation potential material in electrical contact with a tubing.
Claim 13
Dependent Claim
104 words
The method of claim 9 wherein the step of locating the jacket about a reciprocating rod includes the step of spliting the jacket into two halves, and placing thEse halves around the rod, and wherein the step of locating the spring includes the steps of mounting the spring about the halves of the jacket to secure the jacket to the rod and inserting the rod, with the jacket and spring thereon, into the tube whereupon the spring engages the tube in electrical contact therewith while the jacket is in electrical contact with the rod, said electrolytic solution being the ground water in the tubing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |