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所谓“落鱼”就是阻碍井下正常钻井的一切井下落物。打捞落鱼就是用专门工具把掉进井下阻碍钻井的物体清理出井。文章以讲座形式系统地介绍了导致落鱼的原因、分类、打捞前的准备、自由钻杆落鱼的打捞、被卡钻杆落鱼的打捞、碎物及绳状落鱼的打捞,分析讲解了怎样放弃落鱼与打水泥塞以及打捞中的工艺步骤等。 相似文献
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随着地质油藏开发的需要以及海上钻井技术的稳步发展,海上钻井呈现多靶点、轨迹复杂等特点,电缆作业风险随之增大。东海某井在8.5 in井段顺利完钻,鉴于该井为三维反扣井,井眼轨迹较为复杂,因此优化裸眼电测方案:第一趟声波电缆测井,第二趟中子+密度电缆测井,第三趟测压电缆测井。在裸眼电缆测井第二趟中子+密度测井复测数据时,仪器遇卡,遇卡深度2 785 m,鱼顶深度2 769 m。鉴于井下仪器带有放射源,最终确定采用穿心打捞方式组织打捞作业,并成功捞获落鱼,出井仪器完整,放射源安全出井。该文详细阐述了仪器遇卡和打捞作业过程,为后续同类型或类似钻完井作业提供参考,为今后类似井下复杂情况提供借鉴。 相似文献
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《钻采工艺》2017,(2)
涩3-44井是部署在涩北一号构造上验证N22地层天然气聚集情况的一口开发井。四开钻遇高压含气水层,层系多且压力高,安全钻井液密度窗口窄,钻井过程中井漏、溢流频繁,继续钻探困难。甲乙双方决定下尾管,封堵高压水层。下套管遇阻,循环发生井漏,为了很好的封固复杂井段,决定起套管,处理复杂,在通井起钻的过程中发生卡钻。在爆炸松扣的过程中,磁定位、加重杆和爆炸杆落在钻具内;在套铣过程中,由于操作不慎,钻杆卡瓦的一只手把、吊卡的锁销手柄落入井内,给施工增加了难度。经过堵漏、爆炸松扣、倒扣、套铣、打捞等过程,成功处理了这次卡钻事故。通过对事故处理,在高压差、环空有落物情况下的套铣、防漏、防卡,事故工具加工等方面积累了经验,对以后工程事故的预防和处理具有一定的借鉴意义。 相似文献
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<正> 在钻井或采油作业过程中,钻杆柱或油管柱时有遇卡,当用活动管柱或洗井的方法不能解卡时,可采取分段切割的方法。为此,阿塞拜疆石油机械制造科研所研制出一种T_pB型液压式井下油管内割刀,用于切割下 相似文献
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2009年,泰国PTTEP公司在伊朗北部SIALK-1井小井眼裸眼井段钻遇高压气层时发生井漏,在堵漏期间又发生卡钻,随后环空发生溢流,关井后套管和钻杆内最高压力达到6800psi。期间多次从环空用7600psi压力强行压井失败,环空压力保持在5000psi左右。由于钻具与环空不相通,不能在钻具和环空之间建立有效的循环,因此通过常规方法已经不能压井。经过PTTEP专家组讨论,决定采用连续油管技术压井,从3.5in钻杆内(内径2.44in)下入带有独立封井器(10000psi)的13/4in连续油管来替换钻杆内被污染的泥浆,在连续油管内和钻杆之间建立钻井液循环,然后在3.5in钻杆内对卡点进行电缆爆炸松扣,从而建立钻具和环空之间的循环,达到钻井液平衡压井。利用连续油管在小井眼高压井段压井的关键是必须采用高压防喷器,防止钻具内压力突然释放而井口失控,同时使用地面节流阀控制出口压力。安装连续油管前必须先在连续油管头安装喷嘴,反复清洗油管内部,保持油管通畅;同时必须对连续油管及接头进行拉力测试。在连续油管下入钻杆过程中,必须控制进、出口压力,控制下钻速度,通过高压泥浆泵将钻具内污染的泥浆全部替换出来,建立连续油管和钻杆之间的循环。 相似文献
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HP-RTTS封隔器广泛应用于川西北地区试油作业中,随着地层的复杂程度增加,试油难度也急剧增大,导致试油封隔器遇卡事故时有发生。文章以ST102井为例,该井在压井起测试管柱过程中出现测试管柱遇卡情况,将井下HP-RTTS封隔器成功捞出后,首先分析了井下测试管柱遇卡原因,并对该封隔器的打捞难点进行了深入探讨,提出了先采用正扣钻具对扣打捞,再使用反扣钻具套铣打捞的方法,打捞期间优选打捞工具以及施工参数,逐步排除井下遇卡点,效果明显。最终成功将封隔器捞出,并验证了复杂原因为测试管柱底部被钻井液沉淀沉埋,为以后类似的打捞作业积累了经验。 相似文献
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采油过程中,酸化是油气井增产、注水井增注的主要措施。砂岩基质酸化和碳酸岩基质酸化都是在低于储层破裂压力的条件下向地层中注入酸液,溶解地层中的可溶物质,清除孔隙或裂缝中的堵塞物质,从而使油气井增产或注水井增注的一种工艺措施。本文着重讨论了砂岩酸化的设计计算方法,并由此建立一套基质酸化设计方法。 相似文献
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《Oil and Energy Trends》2008,33(5):6-7
This section summarizes downstream developments of the previous month. Exploration & Production are covered in 'Upstream Review'.
An upsurge of violence in Iraq threatened a recovery in output that began earlier this year. Production in the northern fields hit a post-invasion high of 620,000 bpd in March, rising by 180,000 bpd in one month. Fighting in the south, however, cut production there by more than 100,000 bpd as government troops tried to subdue Shi'ite militias in and around Basrah. Oil installations damaged in the south included a pipeline and a pumping station. The Iraqi government nevertheless announced that oil production would reach 2.9 mn bpd by the year's end, requiring an increase of nearly 500,000 bpd over April 2008 levels. Foreign help is to be sought via a series of technical service agreements and - later this year - an upstream licensing round. Japan's Ministry of Economy, Trade and Industry says it wants a bigger role for Japanese oil companies in both the upstream and downstream sectors in Iraq. Kurdistan says it is negotiating with Baghdad to export oil produced from new oil fields there. The central government does not recognize production agreements drawn up by the Kurdistan Regional Government. The EU - desperate for gas to fill its Nabucco pipeline - has approached Iraq for up to 1 bn cfd. 相似文献
An upsurge of violence in Iraq threatened a recovery in output that began earlier this year. Production in the northern fields hit a post-invasion high of 620,000 bpd in March, rising by 180,000 bpd in one month. Fighting in the south, however, cut production there by more than 100,000 bpd as government troops tried to subdue Shi'ite militias in and around Basrah. Oil installations damaged in the south included a pipeline and a pumping station. The Iraqi government nevertheless announced that oil production would reach 2.9 mn bpd by the year's end, requiring an increase of nearly 500,000 bpd over April 2008 levels. Foreign help is to be sought via a series of technical service agreements and - later this year - an upstream licensing round. Japan's Ministry of Economy, Trade and Industry says it wants a bigger role for Japanese oil companies in both the upstream and downstream sectors in Iraq. Kurdistan says it is negotiating with Baghdad to export oil produced from new oil fields there. The central government does not recognize production agreements drawn up by the Kurdistan Regional Government. The EU - desperate for gas to fill its Nabucco pipeline - has approached Iraq for up to 1 bn cfd. 相似文献
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