Casing failure is increasing rapidly in recent years.
近几年，各油田套管损坏速度呈直线上升趋势。
With water_injection, creep and gliding of a mud_rock layer are main reasons for casing failure.
在注水条件下，泥岩蠕变引起层间滑移是套管损坏的主要原因。
Casing failure is a worldwide problem in oil industry and severely impacts the economic benefits.
套管失效问题是一个世界性的难题，严重影响了石油工业的经济效益。
This technology can be used not only in mid-shallow casing failure Wells, but also in mid-deep casing failure Wells.
该项技术不仅适用于中浅层的套损井，也适用于中深层的套损井。
The main reason of casing failure in most oilfields is the plastic flow in salt rock, gypsolyte and shale due to creep.
我国大部分油田套管损坏的原因主要是岩盐层、膏岩层、泥岩层等由于蠕变产生的塑性流动而挤坏套管的。
The probability of packer sticking is increased because of the casing deformation and crustation in casing failure well.
在套损井中，由于套管变形、结垢等因素，进一步加大了封隔器卡钻的可能性。
The wellbore stability, fracturing, cementing strength, and casing failure during thermal recovery are affected by thermal stress.
井壁热应力对于井壁稳定性、水力压裂、水泥环胶结强度、热采套管的损害等都有影响。
The study results could provide certain theoretical guidance in understanding and mitigating casing failure in hydraulic fracturing.
研究成果对认识和缓解压裂中的套损有一定的理论指导意义。
Daqing oil fields have been exploited for thirty eight years, the casing failure in petroleum tube is becoming more and more serious.
大庆油田注水开采三十八年来，油井和注水井套管损坏现象日趋严重。
Defining the mechanism of casing failure and its influencing factors are helpful for mitigation measures and avoiding casing failure.
明确套损机理及其影响因素有助于有针对性地采取缓解措施，避免套损。
The study provides the basis for the research of the casing failure mechanism and controlling measure of the loosen sandstone reservoirs.
这为研究疏松砂岩地层套管的损害机制及防治措施提供了理论依据。
It will bring a lot of troubles, such as the erosion or damage of pipeline and equipment, even leading casing failure and production reduction.
出砂不仅会导致管线和生产设备磨蚀，甚至会产生套管损坏、油井报废、油井减产、停产等一系列严重后果。
The main reason of casing failure in Zhongyuan oilfield is that casing strength is insufficient to resist the immense external force in salt interval.
中原油田套管损坏的主要原因是现有套管强度不够，无法抵抗盐膏层段的巨大外挤力。
The result is propitious to the optimization design of casing slotting under non-uniform load, and offers a gist for analyzing casing failure mechanism.
其结果有利于指导在非均匀载荷作用下割缝的设计，对分析套管变形损坏的机理提供了依据，有利于对套损预防提出有效的建议。
In accordance with the current situation of increasing number of casing failure Wells in Liaohe oil province, study on casing patch workover is carried out.
针对辽河油区目前套管损坏井不断增多的现状，开展了套管补贴大修技术研究。
Field application has shown good effect. The rate of casing failure has reduced by over 20 percent, thus ensuring normal production in thermal recovery Wells.
经现场应用效果明显，可使套管损坏率下降20个百分点以上，从而保证了热采油井的正常生产。
Casing failure mechanisms of thermal recovery Wells in sand production have become a problem to be urgently solved in heavy reservoir thermal recovery production.
热采井出砂套管损坏机理已成为稠油热采生产中迫切需要解决的问题。
Abstract: Casing failure occurs frequently during the hydraulic fracturing process of shale gas formation, which seriously influences the shale gas recovery efficiency.
摘要：在页岩气开采的水力压裂过程中，套损时有发生，严重影响页岩气开采效率。
The mechanism of casing failure is analyzed in detail, the diagnosis and prevention for unknown well casing failure are the key for controlling the rising of casing failure speed.
详细剖析套损形成机理，对未知井套管情况进行差别和预防是控制套损上升速度的关键。
The results show that the natural fracture length and dip angle have great influence on the casing failure, and the increase of casing wall thickness could not reduce casing failure.
分析结果表明：天然裂缝长度和倾角对套损有较大影响，但增加套管壁厚不能缓解套损。
This technology keeps the casing in an elastic state in the whole thermal recovery process without plastic deformation taking place, and thus resolves the problem of thermal casing failure.
该技术可使套管在整个开采过程中一直处于弹性状态，不发生塑性变形，从而解决了套管热破坏问题。
Pull-out failure is the main damage form of round thread casing connections.
连接接头滑脱失效是圆螺纹套管损坏的主要形式。
Gluing is one of the failure forms for casing connection, and it is occurred in the thread during casing makeup.
粘扣是套管接头的失效形式之一，它发生在套管上扣操作过程中的螺纹处。
Corrosion failure of casing in Zhongyuan oil field is a main factor that causes oil or water well abandoned.
在中原油田，套管腐蚀损坏是油水井报废的主要原因。
According to the analysis about the failure of casing in oil region, most damages occur on the perforated interval.
根据对油田套管损坏情况的分析，发现大多数套管损坏部位在射孔段。
The bending failure stability accrued with the increase of the running load, when the small size casing, which was run into the wellbore under the deep well, encountered the resistance.
深井小尺寸套管下入遇阻时，随着下放力的增加，将产生失稳弯曲。
The main failure form of V-round-thread casing, that is, the mechanism of thread connection slipping off, is analyzed in this paper.
本文对V形圆扣套管联接强度失效的主要形式，即套管联接螺纹滑扣(或滑脱)失效的机理进行了分析研究。
Pull-out failure is the main damage form of round thread casing connections.
粘扣是套管接头的失效形式之一，它发生在套管上扣操作过程中的螺纹处。
Pull-out failure is the main damage form of round thread casing connections.
粘扣是套管接头的失效形式之一，它发生在套管上扣操作过程中的螺纹处。
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