| (84) |
Designated Contracting States: |
|
AT DE DK ES FR GB IT NL |
| (30) |
Priority: |
03.02.1994 US 191127
|
| (43) |
Date of publication of application: |
|
29.10.1997 Bulletin 1997/44 |
| (73) |
Proprietor: SCHLUMBERGER HOLDINGS LIMITED |
|
Road Town, Tortola (VG) |
|
| (72) |
Inventor: |
|
- Hepp, Vincent R.
13150 Tarascon (FR)
|
| (74) |
Representative: Stoole, Brian David |
|
Geco-Prakla Technical Services Inc,
Patent Department,
Schlumberger House,
Buckingham Gate
Gatwick,
West Sussex RH6 0NZ
Gatwick,
West Sussex RH6 0NZ (GB) |
| (56) |
References cited: :
US-A- 4 414 656
US-A- 4 853 855
US-A- 4 942 528
|
US-A- 4 852 005
US-A- 4 873 636
|
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| |
|
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in L.W. LEROY, ED.
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With Structural Contour Maps", pages 84-87.
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