| CPC E21B 33/16 (2013.01) | 20 Claims |
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6. A method for performing a cementing operation in a wellbore, comprising:
lowering a tubular pipe including a mechanical stage collar in a deviated section of the tubular pipe into the wellbore;
performing a first stage of cementing by pumping a cement slurry through a landing collar at a bottom end of the tubular pipe and into an annulus between the tubular pipe and the wellbore;
displacing a bottom plug through the tubular pipe towards the landing collar;
latching an opening cone in the mechanical stage collar after displacing the bottom plug, the opening cone comprises a cylindrical midsection and a conical end section defining a hollow path through the opening cone;
restricting flow through the hollow path using a cage in the cylindrical midsection comprising a first profile having a first set of ribs and a second profile having a second set of ribs;
suspending a ball in the cage between the first profile and the second profile;
landing the bottom plug onto the landing collar and displacing the cement slurry by restricting flow through the hollow path;
rupturing the second set of ribs at a predetermined pressure achieved after the bottom plug lands on the landing collar; and
plugging the hollow path by releasing the ball into the conical end section after rupturing the second set of ribs.
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