000			01490nab a2200253 4500
005			20260520004532.0
008			260224s2015 xxu ing
041			_aInglés
245	0	0	_aResing system facilitates shut-off of difficult gas well
260			_a _b _cfeb. 2015
270			_a19/09/2017 ; 19/09/2017
300			_a3 p. ; 101-104
500			_aRecent studies have shown an increase in the percentage of wells affected by sustained casing pressure, over time. Both the oil and gas industry, and governments, are studying the causes of sustained casing pressure, and methods to help prevent undesired flow that can, potentially, result in the loss of wellbore integrity and environmental problems. In northern Colombia, natural gas fields have been developed for decades. However, as a result of mechanical problems, or low economic return rates, some producing wells have been abandoned. Some of the wells were abandoned using conventional cementing techniques without success, resulting in gas communication, through the annulus, to the surface. In some cases, this even has been observed where the primary top of cement (TOC) was planned to surface.
581			_a2
773	0		_tWorld Oil _g
942			_cARTICULO
100	1		_aUrdaneta, J.A. _957314
100	1		_aArroyave, J.M. _957315
100	1		_aJones, P. _929477
100	1		_aAmaya, J.L. _957316
100	1		_aCoral, A. _957317
100	1		_aHernandez, H. _957318
999			_c191222 _d191222