US4337088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-magnetic stabilizer
Assignee: Dailey Petroleum Services Corp
•
Filing: 1980-05-12
•
Granted: 1982-06-29
•
Expires: 2000-05-12
Abstract
Abstract Present invention relates to the manufacture of any type of stabilizer for use in the rotary drilling of oil wells when the stabilizer is made of non-magnetic metals, more specifically Nitronic 60 and/or Nitronic2 50 having wear resistant and anti-galling characteristics.
Inventors
- 👤 Edward L. Moses, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:08
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/58
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A non-magnetic stabilizer for use in rotary rig drilling of boreholes with non-magnetic drill collars and having wear resistant and anti-galling characteristics, which comprises an elongated body having means for contacting the borehole to stabilize the body within the borehole, said body being manufactured of an alloy consisting of by weight: ______________________________________
.3/.06%
Mn
.4.00/6.00%
P
.04%
S
.03%
Si
1.00%
Cr
20.50/23.50%
Ni
11.50/13.50%
Mo
.50/3.00%
V
.10/.30%
N
.20/.40%
Cb
.10/.30%
Fe
balance
______________________________________
Claim 2
Dependent Claim
76 words
A non-magnetic stabilizer for use in rotary rig drilling of boreholes with non-magnetic drill collars and having wear resistant and anti-galling characteristics, which comprises an elongated body having means for contacting the borehole to stabilize the body within the borehole, said body being manufactured of an alloy consisting of by weight: ______________________________________
.3/.06%
Mn
.4.00/6.00%
P
.04%
S
.03%
Si
1.00%
Cr
20.50/23.50%
Ni
11.50/13.50%
Mo
.50/3.00%
V
.10/.30%
N
.20/.40%
Cb
.10/.30%
Fe
balance
______________________________________
Claim 3
Dependent Claim
74 words
A non-magnetic stabilizer for use in rotary rig drilling of boreholes with non-magnetic drill collars and having wear resistant and anti-galling characteristics, which comprises an elongated body having means for contacting the borehole to stabilize the body within the borehole, said body being manufactured of an alloy consisting of by weight: ______________________________________
C - .10%
Mn - 7.0/9.0%
Si - 3.50/4.50%
Cr - 16.00/18.00%
Ni - 8.00/9.00%
N - .08/.18%
Fe - balance
______________________________________
Claim 4
Dependent Claim
74 words
A non-magnetic stabilizer for use in rotary rig drilling of boreholes with non-magnetic drill collars and having wear resistant and anti-galling characteristics, which comprises an elongated body having means for contacting the borehole to stabilize the body within the borehole, said body being manufactured of an alloy consisting of by weight: ______________________________________
C - .10%
Mn - 7.0/9.0%
Si - 3.50/4.50%
Cr - 16.00/18.00%
Ni - 8.00/9.00%
N - .08/.18%
Fe - balance
______________________________________
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) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |