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Class Information
Number: 166/168
Name: Wells > Receptacles > Readily releasable bottom valve
Description: Devices in which there is a valve across the bottom of the container for admitting and retaining fluid from the well, the valve and container being so constructed that the valve may be readily bodily moved from its position across the container so that the container may be emptied after it has been withdrawn from the well.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7028564 |
Low flow bailer system |
Apr. 18, 2006 |
| 6695053 |
Bailer discharging device and method of using thereof |
Feb. 24, 2004 |
| 6082455 |
Combination side pocket mandrel flow measurement and control assembly |
Jul. 4, 2000 |
| 5501279 |
Apparatus and method for removing production-inhibiting liquid from a wellbore |
Mar. 26, 1996 |
| 4721159 |
Method and device for conveying chemicals through borehole |
Jan. 26, 1988 |
| 4717473 |
Apparatus for time-averaged or composite sampling of chemicals in ground water |
Jan. 5, 1988 |
| 4706753 |
Method and device for conveying chemicals through borehole |
Nov. 17, 1987 |
| 4583916 |
Electrical control system for oil well bailer pump |
Apr. 22, 1986 |
| 4516911 |
Solid state control system for oil well bailer pump |
May. 14, 1985 |
| 4470457 |
Device for the transfer of plugging and grouting materials to, and their processing at, a pre-set level in a well |
Sep. 11, 1984 |
| 4424862 |
Injection devices |
Jan. 10, 1984 |
| 4368909 |
Oil well bailer apparatus |
Jan. 18, 1983 |
| 4086035 |
Bailer pumps for oil wells |
Apr. 25, 1978 |
| 4037662 |
Automated bailing apparatus in flexible combination for bailing shallow wells |
Jul. 26, 1977 |
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