| 摘要 |
The invention relates to a rotation-prevention means for ascending pipes in a borehole. The rotation-prevention means brings at least two, tooth-reinforced claws into operative connection with an inner wall of a borehole by way of at least two protuberances. The at least two protuberances are arranged on a preferably hollow basic body. The ascending pipe and/or an eccentric screw pump can be centred by the rotation-prevention means. The claws are connected to one another and/or braced in each case by at least one helical compression spring. |
