www.watsonpacker.com • 432.552.0102

rev. 04/2014 54 wat s o n pac ker llc p ri c e b o o k

Multi-Stage Cementing CollarThe Multi-Stage Cementing Collar provides an effective, economical way to cement one or more specific casing intervals or to cement upper zones after a lower zone has been cemented. The collar should be used with centralizers above and below and a Cementing Basket positioned below the ports. The operation of the collar is simple and reliable. It features a double locking mechanism consisting of a snap ring lock and ball lock system to assure that the ports are permanently locked closed after cementing is completed. Internal parts are designed to lock to prevent rotation during drill out and are constructed of easily drillable materials.

Special Features• Economical• Helps prevent possible formation damage• Easy drill out• Will not spin during drill out• Available in two or three stage• Available with by-pass plug system

Tubing or Casing Size I.D.

Lower Seat I.D.

Upper Seat I.D.

Max O.D.

Opening Press PSI

Part Number

31⁄2 EU 8RD 3.125 2.125 2.500 4.625 1220 210-35

41⁄2 EU 8RD 4.000 2.750 3.250 5.750 1010 210-45

5 EU 8RD 4.500 3.250 3.500 6.090 1580 210-50

51⁄2 EU 8RD 5.000 3.313 4.000 6.750 1000 210-55

7 EU 8RD 6.500 4.375 5.125 8.250 890 210-70

7 EU 8RD 6.250 4.375 5.125 8.062 1000 210-71

75/8 EU 8RD 7.000 4.875 5.750 9.000 960 210-75

85/8 EU 8RD 8.000 5.750 6.500 10.000 940 210-85

95/8 EU 8RD 9.000 7.000 7.750 11.000 760 210-95

103/4 EU 8RD 10.000 8.000 8.750 12.500 610 210-10

133⁄8 EU 8RD 12.500 10.500 11.250 15.500 460 210-13

16 EU 8RD 15.250 13.000 14.000 18.250 420 210-16

Tools available for use with API, Extreme Line, Buttress, Vam, Hydrill, Etc.

Specification Guide

432.552.0102 • www.watsonpacker.com

55wat s o n pac ker llc p ri c e b o o krev. 04/2014

Multi-Stage Cementing CollarOperation ProceduresThe Multi-Stage Cementing Collar is run in the casing string at the point where stage cementing is desired. The first stage shut-off baffle is installed in a collar above the float system used for the first stage. The first stage is cemented conventionally and displayed with a flexible wiper plug.

The trip bomb is dropped and allowed to fall to the lower seat of the cementing collar. Pressure is applied to the casing to open the cementing ports in the collar. The second stage of cementing is performed and the closing plug is used to displace the second stage cement. When the closing plug lands on the upper seat it closes the ports at 1000 PSI pump pressure and the cementing collar locks closed preventing cement slurry flow back.

Centralizers should run above and below the cementing collar and cementing basket run just below the ports of the cementing collar, if necessary.

NOTE: Two (2) plugs, first stage shut-off baffle, and bomb are furnished with the collar.