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Mei M.,China Central Depository & Clearing Co., Ltd. | Jiang W.,Shelfoil Petroleum Equipment & Services Co. | Wei Z.,China Central Depository & Clearing Co., Ltd.
Drilling Fluid and Completion Fluid | Year: 2016

An eccentric mechanical vibration cementing technique was used in Changqing oilfield in an effort to improve the cementing job quality of the injector wells. Cementing slurry was evaluated after vibration on a ZD-34 model electric vibrator as to its compressive strength, bond strength, thickening time, initial setting transition time, final setting transition time, and permeability. The evaluated cement slurry was then used in filed operations. The laboratory study showed that the thickening time of the cement slurry after vibration was reduced by 25%-30%, the initial and the final setting transition time reduced by 30%-50%, the 24 h strength of the set cement increased by 10%-14%, the bond strength increased by 11%-16%, and the permeability reduced by 33.3%-43.9%. This technique has been used in 5 wells in the block Wupu in Changqing oilfield, and the oil zones and water zones in these wells are well separated, with the rate of excellent well cement jobs increased by more than 20%. The laboratory experiments and the field applications all demonstrate that the eccentric mechanical vibration cementing technique can effectively enhance the quality of well cementing, and is prospective in future cementing operations. © 2016, The Editorial Board of Drilling Fluid & Completion Fluid. All right reserved.


Xue Z.,Sinopec | Yuan D.,Shelfoil Petroleum Equipment & Services Co. | Wu J.,Sinopec | Ma L.,Sinopec
Jinshu Rechuli/Heat Treatment of Metals | Year: 2016

Based on the structure and service performance of bridge plug slip, the material of slips was determined as grey cast iron, and the heat treatment test and performance evaluation through ground test were carried out. The results show that surface nitriding after normalization is a suitable heat treatment process for the slips, it can ensure the slips have high surface hardness and good wear resistance, and meet the service performance in bridge plug. © 2016, Editorial Office of "Jinshu Rechuli". All right reserved.


Dai H.,Shelfoil Petroleum Equipment & Services Co. | Dai H.,POWERCHINA Kunming Engineering Corporation | Li J.,Shelfoil Petroleum Equipment & Services Co.
Shiyou Huagong Gaodeng Xuexiao Xuebao/Journal of Petrochemical Universities | Year: 2015

In order to improve the monitoring efficiency and reliability of oil and gas pipeline, the monitoring method of petroleum pipeline temperature based on single-ended Brillouin optical time domain analysis has been proposed. The temperature experiment at oil and gas pipelines leakage location has been taken. The experiment results show that distributed optical fiber sensing technology based on Brillouin scattering can accurately monitor and identify the pipeline temperature change. The temperature measurement resolution can reach 3℃ and spatial resolution of 1 meter in 25 km sensing fiber. ©, 2015, Fushun Petroleum Institute. All right reserved.


Yuan D.,Shelfoil Petroleum Equipment & Services Co. | Wu J.,Shelfoil Petroleum Equipment & Services Co. | Yin L.,Shelfoil Petroleum Equipment & Services Co. | Ma S.,Shelfoil Petroleum Equipment & Services Co. | Feng L.,Shelfoil Petroleum Equipment & Services Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2015

Continuous cooling transformation test of 27CrMoTi steel used for petroleum down-hole tools was investigated by dilatometer DIL805A, combined with microstructure observation and hardness test and continuous cooling transformation (CCT) curves of the steel were determined. Influence of quenching and tempering temperature on mechanical properties were studied. The results show that tempered at the range of 500-640 ℃, the strength decreases with tempering temperature increasing, and toughness improves. According to the requirement of the practical application, quenching at 870 ℃ and tempering at 640 ℃ is the suitable heat treatment process for this steel. ©, 2015, Chinese Mechanical Engineering Society of Heat Treatment. All right reserved.

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