Improved acid tunneling bottom hole assembly and method...

Details Improved acid tunneling bottom hole assembly and method... Improved acid tunneling bottom hole assembly and method...

E - Fixed Constructions

21

B

E21B 7/04 (2006.01) E21B 7/08 (2006.01) E21B 7/18 (2006.01)

Patent

CA 2642704

A bottom hole assembly connected to coiled tubing to create an acid tunnel in a wellbore formation. High pressure acid is pumped down the coiled tubing and out a nozzle located at the end of the bottom hole assembly. The bottom hole assembly includes a first reversible knuckle joint and a second reversible knuckle joint to properly position the nozzle against the wellbore and to allow the assembly to adjust its angle as it initiates and moves through the lateral tunnel. The two reversible knuckle joints increases the radius of curvature of the bottom hole assembly while providing a sufficient attack angle for the nozzle against the wellbore. The two knuckle joints may be adjusted in response to loads applied on the assembly as the assembly moves through the lateral tunnel.

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