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Cementing Collar

Brief Introduction:

Hydraulic two-stage cementing collar is a special device that divides the cementing operation into two parts.

The closing sleeve is designed with anti rotation device, which can prevent the closing sleeve from rotating synchronously with the drill bit.

Special mechanism is designed to prevent the closure sleeve from closing in advance.

After the closure sleeve closes the circulation hole, the locking mechanism on the closure sleeve prevents the closure sleeve from backing up and realizes permanent closure.

All accessories are made of rubber / aluminum material with good drillability.

Gravity type opening plug or replacement type opening plug can be selected for mechanical opening.

The inner diameter of the running joint is the same as the inner diameter of the casing, but smaller than the inner diameter of the closing sleeve, which can effectively protect the closing sleeve from damage during tripping and drilling operations.

No.

Name

Product code

Model

Opening pressure,MPa

Opening acting force,kN

Closing pressure,MPa

Closing acting force,kN

Sealing capacity,MPa 

Rated load,t

Max. OD,mm

Overall length,mm

Length of first-stage plug,mm

Length of closing plug,mm

1

Cementing Collar

47070106

72（Φ177.8）

16～18

96～102

5

97

25

180

208

930

320

280

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