Abstract: System and methods for providing a fluid flow path through a lower casing and a cement of a subterranean well includes a plurality of perforation tubes extending through a sidewall of a lower casing, the perforation tubes moveable from a retracted position to an extended position. In the retracted position a minor length of the perforation tubes is located outside of an outer diameter surface of the lower casing. In the extended position, a major length of the perforation tubes is located outside of the outer diameter surface of the lower casing, the major length being greater than the minor length. In the extended position, the perforation tubes extend radially outward from the outer diameter surface of the lower casing. Each of the plurality of perforation tubes is positioned axially along the lower casing to be moveable to an extended position in a formation zone of the subterranean well.

Abstract: System and methods for providing a fluid flow path through a lower casing and a cement of a subterranean well includes a plurality of perforation tubes extending through a sidewall of a lower casing, the perforation tubes moveable from a retracted position to an extended position. In the retracted position a minor length of the perforation tubes is located outside of an outer diameter surface of the lower casing. In the extended position, a major length of the perforation tubes is located outside of the outer diameter surface of the lower casing, the major length being greater than the minor length. In the extended position, the perforation tubes extend radially outward from the outer diameter surface of the lower casing. Each of the plurality of perforation tubes is positioned axially along the lower casing to be moveable to an extended position in a formation zone of the subterranean well.

Abstract: An elongated inflatable collar is securely attached to the exterior surface of a coiled tubing string before the tubing is lowered into the well for subsequent positioning at a predetermined subterranean location in the well casing. Upon inflation, the inflatable collar seals the annulus between the coiled tubing string and the well casing. A liquid injected from the surface creates sufficient hydraulic pressure on the upper surface of the inflated collar to advance the collar and the attached coiled tubing string and overcome frictional drag forces with the surrounding wall that caused the coiled tubing string to lock-up. The inflatable collar of the present invention can also be used to free a section of coiled tubing that is jammed in the formation due to buckling, by injecting a pressurized liquid into the wellbore downstream of the inflated collar to thereby apply a force to the downhole surface of the collar.

Abstract: An elongated inflatable collar is securely attached to the exterior surface of a coiled tubing string before the tubing is lowered into the well for subsequent positioning at a predetermined subterranean location in the well casing. Upon inflation, the inflatable collar seals the annulus between the coiled tubing string and the well casing. A liquid injected from the surface creates sufficient hydraulic pressure on the upper surface of the inflated collar to advance the collar and the attached coiled tubing string and overcome frictional drag forces with the surrounding wall that caused the coiled tubing string to lock-up. The inflatable collar of the present invention can also be used to free a section of coiled tubing that is jammed in the formation due to buckling, by injecting a pressurized liquid into the wellbore downstream of the inflated collar to thereby apply a force to the downhole surface of the collar.