Oil well tool for in situ release of wellbore treatment fluid

Details Oil well tool for in situ release of wellbore treatment fluid Oil well tool for in situ release of wellbore treatment fluid

1987-08-26

1989-03-07

Novosad, Stephen J.

Wells

Processes

Entraining or incorporating treating material in flowing...

166162, 166169, 166304, 166312, E21B 3700, E21B 3706, E21B 4102

Patent

active

048097780

ABSTRACT:
An oil well tool for in situ release of treatment fluid into an oil well is disclosed. A tubular body is insertable into an oil well casing, which tubular body carries a bladder containing treatment fluid. The body is closed at a lower end and has at an upper end a fishing neck connector. A weight slideable within the tubular body compresses the treatment fluid within the bladder and forces the treatment fluid under a constant pressure through a fluid passageway. The size and length of the fluid passageway, combined with the pressure applied and viscosity of the treatment fluid, dictate the flow rate at which the treatment fluid is deposited into the oil well. The treatment fluid mixes with other fluids being circulated through the well formation. The primary purpose for the treatment fluid is to inhibit scale buildup and corrosion. This is accomplished by slow release of the treatment fluid over an extended period of time.

REFERENCES:
patent: 219440 (1879-09-01), Boles et al.
patent: 2089479 (1937-08-01), Herbsman
patent: 2387002 (1945-10-01), Bannister
patent: 2453068 (1948-11-01), Haynes
patent: 2523608 (1950-09-01), Bell
patent: 2852080 (1958-09-01), Roach
patent: 4421166 (1983-12-01), Cain

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