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Drilling Free Stage Cement Collar
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- 1.The circulation ports are mechanically opened by free-fall opening plug.
- 2.After circulation ports are closed, keep building up pressure will enable the sliding sleeves and other accessories to free fall to bottom, eliminating drill-out.
- 3.The stage collar is designed with internal closing structure. The closing sleeve is designed with hold down mechanism.
- 4.Applicable well inclination: ≤25°. Applicable to vertical wells or inclined wells with small inclination angle
- 5.Close the plug and use POLYPAK seal, it can be more Good sealing effect
- 6.The closing plug uses a flexible rubber plug. Compared with the conventional closing plug, this kind of closing plug has better passability