CN201190893Y - 直燃式液氮泵橇 - Google Patents
直燃式液氮泵橇 Download PDFInfo
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- CN201190893Y CN201190893Y CNU2008203002333U CN200820300233U CN201190893Y CN 201190893 Y CN201190893 Y CN 201190893Y CN U2008203002333 U CNU2008203002333 U CN U2008203002333U CN 200820300233 U CN200820300233 U CN 200820300233U CN 201190893 Y CN201190893 Y CN 201190893Y
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Abstract
直燃式液氮泵橇是一种将液氮增压，并经直燃式液氮蒸发器将高压液氮加热变为常温氮气排出的液氮泵设备，它由发动机、变速箱、液氮高压柱塞泵、直燃式液氮蒸发器、润滑系统、液压系统、液氮吸入系统、液氮增压离心泵、氮气排出高压管汇系统、控制台及仪表、燃油箱、液压油箱组成，尤其适用于大排量的油田氮气作业，在油田液氮施工作业设备领域具有广泛的应用。
Description
技术领域
本实用新型为一种直燃式液氮泵橇设备，属于油田液氮施工作业设备领域。
背景技术
油气井氮气作业越来越广泛，如氮气气举，液氮拌注压裂，混气酸化，氮气正压射孔，氮气垫测试，氮气置换等油田作业。随着目前石油勘探开发力度的加强，对高压力、大排量的氮气作业设备的要求越来越高。
对于利用回收发动机产生的热量来蒸发液氮的液氮蒸发系统，用在中小氮气排量(排量小于400000标准立方英尺/小时)的液氮设备上效能良好，但用在大排量装置上，则效能较差。这是由于若大排量液氮蒸发装置采用这种热回收式蒸发系统，则需要采用更大功率的发动机，从而增加了整套装置的重量和成本。例如，一套在15000PSI压力下氮气排量为550000立方英尺的非直燃式液氮蒸发装置将需要一台约3000马力的发动机，重量、体积及价格都很高。通常设计在15000PSI压力条件下氮气排量大于400000标准立方英尺的经济高效的液氮蒸发装置并非易事。因此，需要更加经济高效的液氮蒸发装置来满足更大排量的油田氮气施工要求。
实用新型内容
本实用新型的目的：利用直燃式液氮蒸发装置来加热液氮，使整套液氮泵橇设备小而经济高效。同时利用此种技术可以消耗较少的动力而在较高的压力下获得较大的氮气排量。
本实用新型采用的技术方案是：一种直燃式液氮泵橇，由发动机、变速箱、液氮高压柱塞泵、直燃式液氮蒸发器、润滑系统、液压系统、液氮吸入系统、液氮增压离心泵、氮气排出高压管汇系统、控制台及仪表、燃油箱、液压油箱组成，其特征在于：发动机后部连接变速箱，变速箱通过传动轴驱动液氮高压柱塞泵。发动机的两个取力口分别驱动液压系统和润滑系统，液压系统为液氮增压离心泵驱动马达、直燃式液氮蒸发器的风扇马达和柴油泵提供液压动力；润滑系统为液氮高压柱塞泵的动力端润滑泵的液压马达提供液压动力。
所述的直燃式液氮泵橇采用直燃式液氮蒸发器进行液氮加热技术。液氮经液氮高压柱塞泵增压后，进入直燃式蒸发器转变为高压氮气，然后进入高压排出管汇系统排出。
所述的直燃式液氮泵橇采用液氮增压离心泵为给液氮高压泵的吸入端提供所需的液氮泵送排量。
本实用新型具有如下优点：
1、直燃式液氮泵橇采用直燃式液氮蒸发器进行液氮加热技术，经济高效，可以消耗较少的动力而在较高的压力下获得较大的氮气排量，尤其在大排量油气井氮气作业方面应用效果突出。
2、直燃式液氮蒸发器采用高效燃烧器以及先进的仪表和控制系统(包括超压、超低温保护系统及数据采集系统)，以确保设备的安全性、可靠性和操作的简单性。
3、液压驱动具有速度补偿泵系统，当发动机转速变化以便调节液氮高压柱塞泵转速时，允许液压油量保持稳定。由于这一特点，不需要配制另一个小发动机来专门驱动液压系统。
附图说明
图1是本实用新型的整机工作正面示意图，
图2是本实用新型的整机工作俯视示意图，
图中，1-发动机，2-液压系统，3-润滑系统，4-变速箱，5-液氮高压柱塞泵，6-直燃式液氮蒸发器，7-液氮吸入系统，8-液氮增压离心泵，9-氮气排出高压管汇系统，10-控制台及仪表，11-液压油箱，12-燃油箱。
具体实施方式
为了进一步公开本实用新型的技术方案，下面结合说明书附图通过实施例作详细说明：
图1和图2是直燃式液氮泵橇整机工作正面及俯视示意图。如图1和图2所示，直燃式液氮泵橇由发动机1、变速箱4、液氮高压柱塞泵5、直燃式液氮蒸发器6、润滑系统3、液压系统2、液氮吸入系统7、液氮增压离心泵8、氮气排出高压管汇系统9、控制台及仪表10、燃油箱12、液压油箱11组成，以上均放在一个橇架内构成一个整体。低压液氮通过液氮增压离心泵8加压后进入液氮高压柱塞泵5的吸入管汇，液氮高压柱塞泵5将液氮加压至高压液氮，并通过直燃式液氮蒸发器6将此高压下、低温液氮转变为高压常温氮气排出，用于氮气施工需要。
该设备工作过程：外部液氮罐内液氮通过液氮增压离心泵8进入液氮高压柱塞泵5的吸入管汇。正常作业时，首先要进行冷泵，打开放空阀，使液氮由液氮吸入系统7进入液氮高压柱塞泵5的冷端，经排空阀排出废气，冷泵充分后，即可启动发动机1进行泵注作业。发动机1通过后部连接的变速箱4及传动轴驱动液氮高压柱塞泵5，通过变速箱4的调速作用使其在需要的不同转速下运转；同时发动机1的两个取力口分别驱动液压系统2和润滑系统3，液压系统2为液氮增压离心泵7驱动马达、直燃式液氮蒸发器6的风扇马达和柴油泵提供液压动力；润滑系统3为液氮高压柱塞泵5的动力端的液压马达提供液压动力。液氮高压柱塞泵5运转后，将低温低压液氮经冷端增压至高压液氮，高压低温液氮经直燃式液氮蒸发器6加热后变为常温高压氮气，然后经氮气排出高压管汇系统9排出。控制台及仪表10对作业全过程进行监控，施工数据由数据采集系统记录并传送。
泵注作业过程中一旦出现氮气超过预先设定的压力或温度低于预先设定的温度，控制台及仪表10将自动使变速箱4回到空档同时发动机1回到怠速，液氮高压柱塞泵5停止运转，复位后，又可正常作业。
Claims (3)
1.一种直燃式液氮泵橇，由发动机、变速箱、液氮高压柱塞泵、直燃式液氮蒸发器、润滑系统、液压系统、液氮吸入系统、液氮增压离心泵、氮气排出高压管汇系统、控制台及仪表、燃油箱、液压油箱组成，其特征在于：发动机后部连接变速箱，变速箱通过传动轴驱动液氮高压柱塞泵，发动机的两个取力口分别驱动液压系统和润滑系统，液压系统为液氮增压离心泵驱动马达、直燃式液氮蒸发器的风扇马达和柴油泵提供液压动力；润滑系统为液氮高压柱塞泵的动力端润滑泵的液压马达提供液压动力。
2.根据权利要求1所述的直燃式液氮泵橇，其特征是：采用直燃式液氮蒸发器进行液氮加热技术。
3.根据权利要求1所述的直燃式液氮泵橇，其特征是：采用液氮增压离心泵为液氮高压泵的吸入端提供所需的液氮泵送排量。
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