又(you)稱負壓除氣(qi)器，是一種用(yong)于處理氣(qi)侵鉆井液的新型(xing)設(she)備，它在(zai)整個鉆井液固(gu)控系(xi)統中(zhong)平衡鉆井壓力起到了重要(yao)的作(zuo)用(yong)，能夠有(you)效清除泥漿中(zhong)的有(you)害氣(qi)體。
的(de)(de)(de)工作原理是利(li)用真空(kong)(kong)(kong)(kong)泵將(jiang)除(chu)氣(qi)(qi)(qi)(qi)(qi)(qi)器主(zhu)體(ti)(ti)(ti)中抽成(cheng)真空(kong)(kong)(kong)(kong)，利(li)用大氣(qi)(qi)(qi)(qi)(qi)(qi)壓(ya)(ya)將(jiang)泥(ni)漿壓(ya)(ya)入(ru)(ru)除(chu)氣(qi)(qi)(qi)(qi)(qi)(qi)器主(zhu)體(ti)(ti)(ti)內(nei)部。氣(qi)(qi)(qi)(qi)(qi)(qi)侵泥(ni)漿經(jing)過除(chu)氣(qi)(qi)(qi)(qi)(qi)(qi)器內(nei)部的(de)(de)(de)葉輪轉(zhuan)動甩(shuai)向除(chu)氣(qi)(qi)(qi)(qi)(qi)(qi)器內(nei)壁(bi)四周，使泥(ni)漿中的(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)(qi)泡破(po)裂，從(cong)而(er)(er)(er)達到除(chu)氣(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)目的(de)(de)(de)。當鉆(zhan)(zhan)井(jing)液中的(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)(qi)泡直徑大于4mm時，能在(zai)浮(fu)(fu)力的(de)(de)(de)作用下很(hen)快逸出液體(ti)(ti)(ti)表面而(er)(er)(er)破(po)裂。直徑小于1mm的(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)(qi)泡被(bei)包(bao)在(zai)鉆(zhan)(zhan)井(jing)液中，出現鉆(zhan)(zhan)井(jing)液密度下降的(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)(qi)侵現象(xiang)。利(li)用真空(kong)(kong)(kong)(kong)泵或噴射(she)式(shi)抽空(kong)(kong)(kong)(kong)裝置使除(chu)氣(qi)(qi)(qi)(qi)(qi)(qi)罐中形成(cheng)一定的(de)(de)(de)真空(kong)(kong)(kong)(kong)度，循環罐中氣(qi)(qi)(qi)(qi)(qi)(qi)侵的(de)(de)(de)鉆(zhan)(zhan)井(jing)液在(zai)真空(kong)(kong)(kong)(kong)造(zao)成(cheng)的(de)(de)(de)壓(ya)(ya)差作用下被(bei)吸入(ru)(ru)除(chu)氣(qi)(qi)(qi)(qi)(qi)(qi)罐內(nei)。在(zai)負壓(ya)(ya)環境下，小氣(qi)(qi)(qi)(qi)(qi)(qi)泡升(sheng)至鉆(zhan)(zhan)井(jing)液表面所受到的(de)(de)(de)壓(ya)(ya)力減小，同時小氣(qi)(qi)(qi)(qi)(qi)(qi)泡體(ti)(ti)(ti)積(ji)增大，增加了小氣(qi)(qi)(qi)(qi)(qi)(qi)泡受到的(de)(de)(de)浮(fu)(fu)力，從(cong)而(er)(er)(er)能迅速地升(sheng)至液面排到空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)中。
