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Sealing Structure of the Pump
Published in Jie Zhang, Chuanjun Han, Rubber Structures in Oil and Gas Equipment, 2022
The mud pump is the main piece of equipment in the mud circulation system used in oil drilling operations. The mud pump has the functions of being the cooling bit, carrying downhole cuttings, and assisting drilling. The rubber cup on the piston of the mud pump is the key mechanism used for sealing, and its sealing performance directly affects the efficiency of the mud pump, and even the whole drilling process. An investigation of the vulnerable parts of the mud pump revealed that the average service life of the piston cup is the shortest [1], which is the weakest link in the mud pump. The failure of the piston cup is caused by the wear marks on the sealing surface of the cup due to abrasive wear, resulting in tiny mud leakage. The wear marks continue to expand, eventually leading to piston failure [2]. The mud pump and piston is shown in Figure 6-2.
Design Criteria for Drill Rigs
Published in C.P. Chugh, Ken Steele, V.M. Sharma, Design Criteria for Drill Rigs: Equipment and Drilling Techniques, 2020
C.P. Chugh, Ken Steele, V.M. Sharma
A mud pump is a piece of equipment used to circulate the fluid that carries the cuttings up from the bottom of the hole. The cuttings will settle out in the pit and the pump will use the same fluid over again. Most mud pumps are double-acting duplex piston pumps and their pressure and flow capacity will vary with the size of the liners and stroke of the pistons. The mud pump suction must be inspected very carefully since a small leak would not emit fluid rather but suck in air. This would lower the performance of the mud pump.
Challenges of constructing a twin 5.2 km long undersea fuel pipelines by HDD method
Published in Australian Journal of Civil Engineering, 2020
In conclusion, the maximum requirement of mudflow, the maximum output capacity of mud pump and mud recycling capacity are 4,500 L/min. The specification of the mud pump is summarised in Table 2. The estimated pressure drop of mudflow due to the friction along the pipe wall and the increase in the annular area is summarised in Table 3 for two different sizes of drill pipes. The calculated friction head loss with respect to drill length for different stages of drilling is presented in Figure 8. (e) Reliability of Pipe During Installation
Stability analysis of coupled torsional vibration and pressure in oilwell drillstring system
Published in International Journal of Control, 2018
S. Toumi, L. Beji, R. Mlayeh, A. Abichou
During drilling opertaions, down hole cuttings need to be transported out of the bore hole. This done by using a mud circulation system. On board the rig, tanks filled with drilling mud feed the principal mud pump which pumps the drilling fluid from the top drive and into the drillstring. Then, Drill-mud is pumped down the inside of drill pipe through the drillstring and fate through the choke. The drill mud transports cuttings out of the well bore and helps maintain the desired pressure in the well bore (see Figure 1).