API Multiple stage collar, Multi-Stage Cementing Collar
1. Introduction
The multi-stage cementing collar provides an effective, economical way to cement one or more specific casing intervals or to cement upper zone saft era lower zone has been cemented. The collar should be used with centralizers aboce 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 snapring 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.
2. Features
1) Opening pressure can be adjusted and it is not subjective to hole angle.
2) The pressure-relief design prevents fluid trapping and compression during the closing phase of the tool's operation.
3) The I.D of upper/lower sub is the same as that of casing, but smaller than that of closing sleeve, which can minimize chances of damages to the closing sleeve.
4) The inner seats are made of an easily drillable NBR rubber/aluminum material. Both the opening and closing seats lock agaist rotation for easy drill out.
3. Parameter
Specifications, (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 |
Company Information
Puyang Zhongshi Group Co., Ltd is a professional manufacturer of various oilfield equipments and cementing accessories since 1997, restructured enterprise of SINOPEC.
We have the certificates of API 5CT, API Q1, API 11E, API 6A, API 11AX, ISO 9001 and ISO 14001, etc..
Our products mainly include:
1. Casing Centralizer
2. Float Collar & Float Shoe
3. Cementing Plug
4. Cementing Head
5. Cement Basket
6. Tubing Pump / Rod Pump
7. Valve Ball & seat
8. Casing / Tubing Pipe and Coupling
9. Stage Collar
10. Pumping Unit
11. Sucker Rod
Our group have more than 10 years export experience and 9 subsidiary factories, more than 500 employees. We are the first-class supplier of resources market of SINOPEC and CNPC. Our foreign customers are mainly from America, Central Asia, Russia, Southeast Asia, Middle East, etc.
Contact Us
PUYANG ZHONGSHI GROUP CO.,LTD
Add: 5th community, Zhongyuan Oilfield, Puyang, China
Website: zschinajixie.en.made-in-china.com;
zschinajixie.en.made-in-china.com
zschinajixie.en.made-in-china.com
Irene is here waiting for you!!
Audited Supplier 
){kind=link}
){kind=link}