API Casing Stage Collar Cementing Collar

API Casing Stage Collar Cementing CollarStage cementing collar (hereinafter referred to as stage collar) is a mechanical tool used in dual stage cementing operation. This tool can be used to divide t

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API  Casing Stage Collar Cementing Collar


Stage cementing collar (hereinafter referred to as stage collar) is a mechanical tool used in dual stage cementing operation. This tool can be used to divide the required cementing section into two stages from bottom to top for cementing, and it can also be used for cementing of any formation section.The use of Stage cementing collar can reduce the annular hydrostatic column pressure, which not only reduces the possibility of well leakage in cementing operation, but also reduces the operating pressure and reduces the cementing time. At the same time, it can prevent or reduce the oil and gas flowing over the water caused by weight loss of cement slurry, which is beneficial to improve cementing Operation quality.

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The  collar's clear opening and closing indications at the surface  accommodate the  hydraulic conditions of the well for safer, more  efficient operations.  The internal sleeves increase reliability and  prevent premature opening from formation restrictions on applied pressures. It reduces total pumping pressure in long casing  strings. 


Hydraulic stage collar meets the challenges of cementing holes at any angle with a  hydraulically opened port system. Stage collar designed specifically for horizontal completion. It  is specifically used for Primary cementing in deep vertical or high deviated  horizontal-well conditions. It reduces total hydrostatic pressure on weak formations to prevent lost circulation during  cementing.

 


Specification

 

Size (in)

5 1/2”

7”

9 5/8”

13 3/8”

Max O.D. (mm)

Φ170

Φ208

Φ283

Φ381

Drill-out I.D. (mm)

Φ122

Φ155

Φ220

Φ315

Overall Length (mm)

1082

1182

1222

1280

Rated Load (t)

140

170

210

300

Sealing Capacity (MPa)

25

25

25

25

Opening Pressure (MPa)

13

13

13

14

Closing Pressure (MPa)

5

5

5

5

Lower Sliding Sleeve I.D. (mm)

Φ85

Φ115

Φ176

Φ203

Upper Sliding Sleeve I.D. (mm)

Φ95

Φ125

Φ197

Φ285