While underbalance drilling spreads greatly, rotating blowout preventer, as a kind of high technical product, is the crucial equipment to control well pressure.
YNF30 Jackdrill with caunter-cylinder is developed with the aim at resolving the problem existing in the deep-hole drilling by single-cylinder hand diesel jackdrill.
Methods 18 cases of calcanodynia were received comprehensive surgical therapy,including resection of bone spur,lysis of plantar fascia and decompression by drilling in calcaneus.
Based on the laboratory experiments, MMH polymer MMH polysulfonate drilling fluids system is developed through analyzing the properties of positive colloid, polymers and polysulfonate muds.
The drilling results and drill stem test result prove that the prediction results of seismic nonelastic effect completely coincide with the actual gas-bearing Situation in the reservoir.
So the distribution and the content of conglomerate were different, and its geological phenomenon in the data of drilling, outcrop, logging and seismal section in different area.
It includes the division of dissolving area, the redetermination of its length and width,downhill layout of dissolving area a nd improvement of drilling tunnel and cutting grooves.
When drill hole in sandy soil the desander should be timely turned on to reduce the sand content and ensure the drilling progressing and stability of the hole.
It is the reason why the wildcatter, the independent oilman whose test drillings might come up dry 20 times before gushing in the end, is an enduring Texas symbol.
It is proved that the anti-collapse function of the treating chemical in fluid kerite in piedmont drilling is more and more obvious, and the application is more and more widely.