• Model NO.：7 " & 9 5,8" & 13 3,8"
• Drawings：Available
• Markings：Acceptable
• OEM：Available
• Transport Package：Wood Cases
• Specification：4 1,2"-20"
• Trademark：zhongshi
• Origin：Henan, China
• HS Code：843143100
• Production Capacity：10000PCS,Month

Casing SizeHole SizeMax O.D.in.in.mmin.2024/26650/71425.591/28.11018-5/822/24590/68023.228/26.7721620/22550/61321.654/24.132141848419.05513-3/817-1/247018.50412-3/417- 1/246618.34610-3/412-1/437014.5679-5/812-1/437514.7647-5/89-7/827310.74878- 1/22529.9216-5/88- 1/22459.6465- 1/28- 1/225610,07956- 1/21907.4804-1/261817.126
 


This integral one-piece bow spring centralizer is a high-end centralization product. The 
centralizers are built to gauge to offer easier, RIH, maximize standoff, and maximize the cement job. The UROS range of centralizers are built mostly for passing through close tolerance situations and then opening back up into under reamed holed sections, or washed out  sections, while still providing quality stand-off  performance. Bow spring sections are based on a straight bladed principle, but are curved in both axial and tangential directions. This cross curvature conforms to the borehole wall, while the axial curvature changes proportionally as it encounters different loads. As the loads increase, the surface contact area also increases, reducing the load per square unit of area. This helps avoid compression and shear failure of the formation surface.
1.One-piece integral unit combined with zero start and running force.
2.High standoff ratio (+85%) combined with high restoring force.
3.Straight blade to achieve maximum slide effect.
4.Designed to compress fully in tight spots.
5.Reduces both torque and drag.
6.Made to gauge.
7.Sizes range from 4 1/2"to 20".

Bow spring centralizers, both welded and non-welded, are to help center casing in wellbore, allowing even distribution of the cement around the casing during cementing operations according to API 10D standard. The sizes cover 4-1/2"~20".