US3787226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating tubular goods while simultaneously testing the interior thereof
Assignee: Spinning Pipe Service Inc
•
Filing: 1971-11-23
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Granted: 1974-01-22
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Expires: 1991-11-23
Abstract
Abstract A method of treating tubular goods with an inhibitor which comprises forcing the inhibitor into intimate contact with the surface area of the metal goods to be treated by utilizing high pressure techniques. The inhibitor is forced into the multitude of cracks and minute voids located in the irregular surface of the metal, so that after the pressure is removed and the inhibitor drained from the surface, a coating of the inhibitor is left within the outer boundary of the metallic surface, thereby forming a protective film on the surface of the metal. Advantage is taken of this expedient to provide a method of simultaneously treating pipe surfaces with an inhibiting agent, while at the same time the pipe joints are hydrostatically tested.
Inventors
- 👤 J Iglehart
- 👤 H Iglehart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:06
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/22; C; C23; C23F; C23F11/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
16 words
flow connecting an inhibiting agent from a source to the isolated area located between the packers;
Claim 2
Dependent Claim
11 words
The method of claim 1, and further including the following steps:
Claim 3
Dependent Claim
17 words
flow connecting an inhibiting agent from a source of supply to the interior of said enclosure means;
Claim 4
Dependent Claim
43 words
increasing the pressure of the inhibiting agent upon the interior of said enclosure means so as to cause the agent to coat the interior surface of the goods and to displace any compressible fluid which may be present on the isolated surface thereof;
Claim 5
Dependent Claim
30 words
The method of claim 1, wherein: the enclosure means is an upright vessel having a closure means at the upper extremity thereof through which the tubular goods may be transported.
Claim 6
Dependent Claim
36 words
increasing the pressure of the inhibiting agent upon the isolated surface so as to cause the agent to coat the isolated surface and to displace any compressible fluid which may be present on the isolated surface;
Claim 7
Dependent Claim
40 words
carrying out step (3) while at the same time hydrostatically testing the structural integrity of the coupling member of the pipe string by adjusting the pressure to a value which is representative of the working pressure of the pipe joint;
Claim 8
Dependent Claim
27 words
Method of testing coupling members of a series connected string of pipe joints while simultaneously treating the interior surface thereof with an inhibitor comprising the steps of:
Claim 9
Dependent Claim
14 words
and, removing the residual inhibitor from the isolated surface after carrying out step (3).
Claim 10
Dependent Claim
16 words
The method of claim 4 wherein said inhibiting agent includes an oil soluble organic liquid inhibitor.
Claim 11
Dependent Claim
13 words
removing the residual inhibitor from the isolated surface after carrying out step (3).
Claim 12
Dependent Claim
14 words
The method of claim 4 wherein said inhibiting agent includes a water dispersed inhibitor.
Claim 13
Dependent Claim
22 words
The method of claim 4 wherein the inhibiting agent of step (2) includes a liquid which wets the entire surface undergoing treatment.
Claim 14
Dependent Claim
10 words
movably affixing a closure means to the enclosure means; and
Claim 15
Dependent Claim
7 words
actuating the closure means by hydraulic ram.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |