Elastomer sealing performance is of critical importance for downhole tools application including the use of fracturing(Frac)plugs during multi-stage hydraulic fracking.In practice sealing performances of such plugs ar...
supported by the National Natural Science Foundation of China(11972375,12211530028);the Natural Science Foundation of Shandong Province(ZR202011050038,ZR2022MA086);the Science and Technology Project in Qingdao Developing Zone(2020-81);Special Funds for the Basic Scientific Research Expenses of Central Government Universities(2472022X03006A).
The rubber cylinder is a key component for maintaining the sealing pressure of the packer,particularly in deep underground wells.The stress relaxation of materials,as a typical feature of viscoelasticity,has become on...
Foreign body retained for long duration sometimes causes vesico-vaginal and recto-vaginal fistula. We report a 60-year-old woman with vaginal foreign body causing vesico-vaginal and recto-vaginal fistula;she died afte...
The reservoir of block Du 66 in Shuguang Oilfield is unevenly developed, and development contradictions continue to appear. The contradiction in the middle and late development is more obvious. In order to make its de...
National Science and Technology major projects(2016ZX05042-004);Graduate Innovation Project(YCX2019059)for the financial support。
Nylon cord rubber has the advantages of small residual deformation and is easy to lift and lower the tubing string in low-permeability oil and gas reservoirs.However,it is associated with low-pressure resistance and p...