Products Two-stage cementing collar series Drilling Free Stage Collar
2 There have the “two plugs”design for first-stage cementing. That is after first-stage plug downwards to stage tool, and compounded with hollow plug which in the stage tool, use the peculiarity of good isolation impression of hollow plug, solve the question that remain slurry in the inside wall of casing.
3 Second-stage cementing use the design of “easy open, easy close, slide smoothly”. Free-fall plug use the heavy design, closing plug use the design of two element composite, it will realize drilling free cementing operation in the real sense.
4 All accessories, made from premium quality rubber or aluminum material, have very good anti-rotating mechanism that makes drillout easy.
|
Specification(in) |
51/2 in（Ф139.7mm） |
|
First-stage plug opening pressure，MPa |
2 |
|
Free-fall plug opening pressure，MPa |
6±1 |
|
Closing plug cosing pressure，MPa |
6±1 |
|
Sealing capacity，MPa |
25 |
|
Rated load，t |
120 |
|
Connection thread |
API 51/2in LTC (BTC) |
|
Max. OD，mm |
Ф174 |
|
Drill-out ID，mm |
Ф118 |
|
Length of first-stage plug，mm |
363 |
|
Length of free-fall plug，mm |
240 |
|
Length of closing plug，mm |
295 |
|
Length of shut-off baffle, mm |
320 |
|
Overall length，mm |
1090 |
