Development and application of a new socket for sucker rod

Oil wells in the Tahe oil field are usually 5 350-6 600 m deep with open hole completion, making sucker rod salvage very difficult, especially when sucker rod and oil tube break and fall off together. A new socket for sucker rod was developed, composing of guiding cylinder, turning plate and sleeve milling cylinder, to improve salvage success rate. The guiding cylinder helps sucker rod gradually enter the turning plate and sleeve milling cylinder, realizing the coupling of sucker rod. The new socket was applied 6 times in well TH10341, and successfully retrieved all bending sucker rods in wellbore, which improved repairing progress, reduced operation cost, recovered oil capacity by 5 400 t, and created benefits of 864×10⁴ yuan.