| (19) |
 |
|
(11) |
EP 0 416 915 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
08.07.1992 Bulletin 1992/28 |
| (43) |
Date of publication A2: |
|
13.03.1991 Bulletin 1991/11 |
| (22) |
Date of filing: 06.09.1990 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT NL |
| (30) |
Priority: |
06.09.1989 US 404029
|
| (71) |
Applicant: HALLIBURTON COMPANY |
|
Duncan
Oklahoma 73536 (US) |
|
| (72) |
Inventor: |
|
- George, Kevin R.
Columbus,
Texas 78934 (US)
|
| (74) |
Representative: Wain, Christopher Paul et al |
|
A.A. THORNTON & CO.
Northumberland House
303-306 High Holborn
London WC1V 7LE
London WC1V 7LE (GB) |
|
| |
|
| (54) |
Time delay perforating apparatus for wells |
(57) Apparatus for perforating a well comprises at least one first gun (20) and second
gun (22) with a time delay device (50) positioned therebetween in a housing (24) connecting
first and second guns. The time delay device delays firing of the second gun (22)
for a predetermined period after firing of the first gun (20)and also preferably prevents
fluid communication between the first and second guns by closing off a central opening
(26) through the housing.