|
US3827490A
|
Apparatus for installing and removing flow valves |
Expired / Lapsed
|
1970-12-04 |
1974-08-06 |
19 |
Details
|
|
US3799258A
|
Subsurface well safety valve |
Expired / Lapsed
|
1971-11-19 |
1974-03-26 |
7 |
Details
|
|
US3788397A
|
Kickover tool |
Expired / Lapsed
|
1972-10-24 |
1974-01-29 |
11 |
Details
|
|
US3786865A
|
Lockout for well safety valve |
Expired / Lapsed
|
1973-03-06 |
1974-01-22 |
13 |
Details
|