US3722589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well production testing and flow characteristic evaluation methods using small diameter tubing
Assignee: Camco Inc
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Filing: 1971-04-28
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Granted: 1973-03-27
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Expires: 1991-04-28
Abstract
Abstract Well methods using small diameter tubing introduced into and withdrawn from the well by an injector apparatus. The tubing is introduced into and withdrawn from the well by the injector from a tubing-holding reel. The methods include the introduction of an inert gas such as nitrogen through the small diameter tubing. Other gases may also be introduced through the small diameter tubing. The methods are especially suitable for use in petroleum wells, but may if suitable be used in water wells. The small diameter tubing is hung in the well with its lower end adjacent the formation to be tested, and injection of gas through the tubing lifts a layer of uncontaminated reservoir fluid to the surface. Continued gas injection accomplishes formation flow characteristic evaluation.
Inventors
- 👤 C Johnson
- 👤 A Smith
- 👤 R Plummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:42
CPC Classifications
E; E21; E21B; E21B49/00; E21B33/00; E21B33/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
Method for performing production testing of wells, comprising running a small diameter tubing down a well by means of a tubing injector apparatus, said tubing injector apparatus including a reel for storing the tubing wound thereon and having gas entrance means to said tubing at the hub of said reel, said tubing being run to below the surface of production entering the well from a reservoir, and production testing the well by injecting pressured gas into the production through said small diameter tubing to lift a portion of said production to the surface for recovery in uncontaminated condition.
Claim 2
Dependent Claim
98 words
Method for performing production testing of wells, comprising running a small diameter tubing down a well by means of a tubing injector apparatus, said tubing injector apparatus including a reel for storing the tubing wound thereon and having gas entrance means to said tubing at the hub of said reel, said tubing being run to below the surface of production entering the well from a reservoir, and production testing the well by injecting pressured gas into the production through said small diameter tubing to lift a portion of said production to the surface for recovery in uncontaminated condition.
Claim 3
Dependent Claim
10 words
Method according to claim 1, said pressured gas being nitrogen.
Claim 4
Dependent Claim
31 words
Method according to claim 1, including continuing introduction of said pressured gas and removing production from the well therewith for a time sufficient to determine flow characteristic evaluation of the well.
Claim 5
Dependent Claim
10 words
Method according to claim 3, said pressured gas being nitrogen.
Claim 6
Dependent Claim
18 words
Method according to claim 3, including hanging said small diameter tubing in place during said flow characteristic evaluation.
Claim 7
Dependent Claim
58 words
Method according to claim 1, said well having liquid material therein above the surface of production entering the well from a reservoir, and including introducing pressured gas through said tubing while said tubing is being run to below said surface to gasify the liquid material and circulate same from the well prior to production testing of the well.
Claim 8
Dependent Claim
10 words
Method according to claim 6, said pressured gas being nitrogen.
Claim 9
Dependent Claim
17 words
Method according to claim 1, including hanging said small diameter tubing in place during said production testing.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |