摘要 |
A spring centraliser device for supporting a tubular member spaced from the wall of a bore is made from a single piece of boron steel material. The spri ng centraliser device has first and second collars spaced apart along a longitudinal axis. Spring bow portions extend between the collars. As the device is made from a single piece of material, the material extends seamlessly from each collar portion through the bow portions so that there a re no joins or points of weakness. Use of boron steel means that the device can be made by cold forming. |