PYZS Non Welded Semi Rigid Centralizer

ZHENGZHOU, August 16,2016-Semi rigid centralizer is designed and maufactured according to API Specification 10D,but the kinds of rigid centralizer from Puyang Zhongshi Group (PYZS) with API 10D certificate for many years features far up to the performance standard set forth in API Specification 10D.

From the appearance of centralizer,the non weld semi rigid centralizer is mistaken for bow spring centralizer,but the excellent and  uniquely profiled bows offer the desirable features in bow spring centralizer and rigid centralizer for operator in cementing job of oilfield at the same time.The bows of semi rigid centralizer are processed from high grade 65Mn  alloy steel which is heat treated and tempered.During production the end collar of interlocking way is added into the semi rigid centralizer,so it is ideally to be used in oilfield work.The semi rigid centralizer is widely applied in horizontal and highly deviated wells where low running forces are a must.

 

The import feature of semi rigid centralizer is with starting forces far below API Max value ,with very low drag forces.As we know  the spring characteristic of bows are compressed to get through tight spots and doglegs.The semi rigid centralizer provides restoring forces as we need pay more attention  that far exceed those standards set forth in API Specification 10D and which are normally associated with rigid centralizers.

The slip on and hinged semi rigid centralizers are available and the sizes from 5-1/2 to 20inch for any hole combination.In order to tighten the semi rigid centralizer,the rigid centalizer is connected between two stop collars, if requested, can be manufactured with a built-in stop device.

 

Semi Rigid Centralizer Dimension and Performance Data

 

Casing Size(In)	Hole Size(In)	Number of Bow	Bow O.D(In)	Starting Force (Lbs)		Restoring Force (Lbs)
				API	PYZS	API	PYZS
5-1/2	8-1/2	4	8.5	620	<150	620	2700
7	8-1/2	6	8.63	1040	<150	1040	3500+
9-5/8	12-1/4	6	12.38	1600	700	1600	3500+
10-3/4	12-1/4	6	12.38	2040	<150	1020	3500+
13-3/8	17-1/2	8	17.63	2400	450	1220	3500+

 

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