| 摘要 |
A pressure actuated vent assembly for completing a slanted wellbore. The assembly is connected in series relationship within a tubing string at a location below a packer, and the packer elements are located between the casing and the tubing string, thereby dividing the casing annulus into an upper and lower annular area. The vent assembly includes a ported sliding sleeve which is slidably received about a ported main body member. The sleeve is held into position by a shear pin. Guide pins maintain the ports of the sleeve and main body member aligned with one another. When pressure is applied to the inside of the tubing, the sliding sleeve is forced to slide from an upper closed position, in a downward direction, where the sleeve locks into the opened position. The vent assembly is especially useful in slanted boreholes because various tools may be circulated down through the axial passageway of the assembly and downhole to perform a number of different downhole operations, such as completing a new wellbore, for example.
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