Coiled tubing drilling and service unit and method for oil and g

Details Coiled tubing drilling and service unit and method for oil and g Coiled tubing drilling and service unit and method for oil and g

1992-08-28

1993-09-14

Bui, Thuy M.

Wells

Processes

Assembling well part

166 84, E21B 3300

Patent

active

052440460

ABSTRACT:
A coiled tubing service unit and method for oil and gas wells including a string of components extending above ground in coaxial alignment with said well and including an injector for injecting coiled tubing into the well and a sealing unit for preventing the flow of pressurized oil and gas from the well. The sealing unit is adapted to be disconnected from the string of components and removed from the coaxial alignment to permit a relatively large-diameter tool assembly to be inserted therein. The sealing unit can then be repositioned and connected in the string of components and the coiled tubing can be reinserted into the string, connected to the tool and driven into the well.

REFERENCES:
patent: 3827487 (1974-08-01), Jackson et al.
patent: 4147215 (1979-04-01), Hodge et al.
patent: 4512410 (1985-04-01), Forester
patent: 4515220 (1985-05-01), Sizer et al.
patent: 4552213 (1985-11-01), Boyd et al.
patent: 4655291 (1987-03-01), Cox
patent: 4940095 (1990-07-01), Newman

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