Chinese manufacturer Straight Vane Casing Roller Centralizers
Roller centralizers are mainly used for big high Roller, high deviated wells and horizontal wells, to centre casings.Roller Centralizers can also remove wellbore cake and improve mud replacement efficiency etc.Roller Centralizers provide superior wear resistance and have been proven to remain functional throughout the life of the well and can aid in casing/tubing retrieval.
Precision-machined inside diameter fits over the casing through the complete API tolerance range, providing excellent rotational performance in mud.
When running casing through open hole, the system's smaller roller-contact area reduces the risk of differential sticking and maintains standoff .The roller/axle relationship ensures that axle shear stresses remain within elastic limits, preventing permanent deformation.
Axles are crimped in place, eliminating the welding process, while ensuring the rollers cannot break free and fall into the wellbore. The system's high-quality construction materials improve high-pressure/high-temperature capabilities.
Roller Centralizers are available in sizes 4½" to 20".Any special sizes are available on request.
Parameter
Model
(in) |
Hooping In-Dia. (mm) |
Hooping thickness(mm |
Total length
(mm) |
Max.Out-Di
(mm) |
Amount of spring(mm) |
| 5-1/2" x 8-1/2" |
142-148 |
3-5 |
650±50 |
225±5 |
5 |
| 7" x 9-5/8" |
181-186 |
3-5 |
650±50 |
255±5 |
6 |
| 7" x 8-1/2" |
181-186 |
3-5 |
650±50 |
235±5 |
6 |
| 8-5/8 x 12-1/4" |
223-228 |
3-5 |
650±50 |
330±5 |
8 |
| 9-5/8 x 12-1/4" |
250-255 |
3-5 |
650±50 |
330±5 |
8 |
| 10-3/4 x 12-1/4" |
274-276 |
3-5 |
650±50 |
330±5 |
9 |
| 13-3/8"x17-1/2" |
342-347 |
3-5 |
650±50 |
450±5 |
11 |
| 18-5/8"x24" |
475-477 |
3-5 |
600±50 |
610±5 |
12 |
| 20"x26" |
509-511 |
3-5 |
600±50 |
660±5 |
12 |
Company information
The predecessor of Henan Puyang Zhongshi Group Co.,Ltd. was the 5th Machine Repairing Factory of Puyang Zhongyuan Oil field, Sinopec Corp. In 1997, after being restructured according to the modern corporate system, the factory was named Puyang Zhongshi Group Co.,Ltd.
With registered capital of 60,840,000 yuan, Puyang Zhongshi Group is composed of 9 subsidiaries, including 8 manufacturers and 1 trade company. Zhongshi Group covers an area of 200,000 sq.m, including workshop area of 50,000 sq.m. Various kinds of production equipment values 38,600,000 yuan. It has a strong mechanical processing capability.
Our leading products are pumping unit , wellhead (X-mas tree), tubing pump & sucker rod pump, cementing accessories, down-hole tools,casing centralizer, drilling solid control series,float collar, pressure vessel ,camping house, air cannon, belt feeder ,float shoe and so on. They are mainly supplied to Central Asia, Southeast Asia, Africa and Middle East and many other countries.
Zhongshi Group has been the Tier One internet service provider of Sinopec. We passed ISO9001 quality management system certification and got approved to use API monograms on its oil machineries. So far, we have attained API 5CT, API 10D, API 11AX, API 11E and more are applying for.
With strong technical backup, reliable product quality, advanced marketing regime and good service system, this company wins popularity and recognition of vast consumers home and abroad.
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