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Multiple Stage Cementing Collar
Multiple Stage Cementing Collar
Multiple Stage Cementing Collar
Multiple Stage Cementing Collar

Multiple Stage Cementing Collar

IRI’s Stage Collars are used in applications where high hydrostatic pressures could fracture formations during cementing operations. The Stage Cementing Collar provides a means of opening and closing ports for cement displacement and positive containment of the cement after displacement.

After running the casing to depth, the first stage is cemented normally. Once the first stage is complete an opening cone is dropped (Mechanical Tool) and lands on the seat of the Stage Collar, the casing string is pressured to shift the tool open. Cement is pumped per customer program, cement is displaced with the closing plug, lands on seat, pressure is applied to the casing string and the sleeve shifts to the closed position. Cementing operations are now complete.

  • Mechanical or Hydraulic designs
  • Opening pressure is field adjustable
  • Large flow port flow area (does this match the casing?)
  • Compatible with cement baskets or inflatable packers
  • Opening cones and plugs are made in composite materials for easy drill out
  • Tool positively “locks out” following cementing operations
  • Temperature rated to 350 F
  • Manufactured to ISO 9001 Standards
Size Part No.
4 ½” 290-0044
5 ½” 290-0054
7” 290-0070
7 5/8” 290-0075
8 5/8” 290-0085
9 5/8” 290-0095
10 ¾” 290-0106
13 3/8” 290-0133
  • All internal parts are PDC drillable.
  3 1/2" 4 1/2" 5 1/2" 7" 8 5/8" 9 5/8" 13 3/8"
Tool OD 4.625 5.750 6.750 8.250 10.000 11.000 15.563
Drill out ID 3.000 4.000 5.000 6.500 8.000 9.000 12.500
Overall Length 8rd 26.750 26.813 27.750 29.187 30.312 32.124 32.563
Buttress 26.750 
(10rd)		 n/a n/a 30.312 31.124 32.124 33.063
Length Between
Seats		 Closed 7.563 10.063 10.063 9.875 9.875 9.875 10.313
Open 9.719 12.563 12.563 12.426 12.382 12.382 12.820
# Port Holes 8 8 8 8 10 10 12
Dia. Port Holes 0.500 0.656 0.750 0.875 0.875 0.875 0.875
Area of Each Port Hole (in. 2) 0.196 0.338 0.442 0.601 0.601 0.601 0.601
Total Area Ports (in. 2) 1.571 2.704 3.534 4.811 6.013 6.013 7.216
Opening Seat ID 2.125 2.750 3.320 4.380 5.750 7.000 10.500
Closing Seat ID 2.500 3.250 4.000 5.130 6.500 7.750 11.250
Opening Sleeve ID 3.125 4.000 5.000 6.500 8.000 9.000 12.500
Closing Sleeve ID 3.125 4.000 5.000 6.500 8.000 9.000 12.500
Opening Pressure (PSI) 900 1000 1000 900 900 750 550
Closing Pressure (PSI) 500 900 900 800 850 700 400
Tensile Strength (lbs.) K-55 74,413 78,908 97,776 126,079 208,981 364,505 591,522
N-80 108,238 114,775 142,220 183,387 303,973 530,190 860,396
P-110 148,827 157,815 195,552 252,157 417,962 729,011 1,183,044
Burst Pressure
(PSI)		 K-55 4,558 4,014 3,266 2,552 2,772 3,557 2,899
N-80 6,629 5,839 4,750 3,712 4,032 5,174 4,217
P-110 9,115 8,028 6,532 5,104 5,544 7,114 5,798
Collapse
Pressure (PSI)		 K-55 4,962 4,396 3,606 3,474 3,077 3,915 3,213
N-80 7,217 6,394 5,245 5,052 4,476 5,694 4,674
P-110 9,924 8,792 7,211 5,679 6,154 7,830 6,427

All dimensions are given in inches unless otherwise stated.


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