石油钻采工艺
石油鑽採工藝
석유찬채공예
Oil Drilling & Production Technology
2015年
5期
109-112
,共4页
刘成贵%尚玉星%王海龙%吐尔逊江·吐尔地%董乔云
劉成貴%尚玉星%王海龍%吐爾遜江·吐爾地%董喬雲
류성귀%상옥성%왕해룡%토이손강·토이지%동교운
自锁Y221封隔器%隔抽管柱%管杆偏磨%释放压重%节能降耗
自鎖Y221封隔器%隔抽管柱%管桿偏磨%釋放壓重%節能降耗
자쇄Y221봉격기%격추관주%관간편마%석방압중%절능강모
self-locking Y221 packer%packer pipe string%eccentric wear on tubing and rod%release of weight%saving energy and reducing consumption
Y221封隔器广泛地应用在隔抽管柱上，但常规Y221封隔器坐封后，在压重作用下，封隔器以上的油管、泵筒会在轴向上弯曲变形，加剧管杆偏磨，增加抽油机负荷，针对此现象，研制了一种自锁式Y221封隔器。阐述了该种封隔器的工作原理，并且针对封隔器胶筒的合理压重，对封隔器卡瓦的锚定力进行了校验，对解封负荷进行了计算。此外，还设计了配套的自锁式Y221封隔器的坐封工具，使得卸载压重后，封隔器既不解封，油管挂还能顺利坐入井口，实现管柱的入井回接。由于在封隔器内部增加了自锁机构及双级解封机构，封隔器坐封后，当释放掉压重时，封隔器依然能够保持坐封状态，封隔器上部管柱处于自由状态，从而减少了抽油杆的上下行摩阻及抽油机负荷。但该管柱在自锁方面有其局限性，即虽然可多次坐封，但只能第1次坐封后可以自锁，再次坐封后不能自锁。
Y221封隔器廣汎地應用在隔抽管柱上，但常規Y221封隔器坐封後，在壓重作用下，封隔器以上的油管、泵筒會在軸嚮上彎麯變形，加劇管桿偏磨，增加抽油機負荷，針對此現象，研製瞭一種自鎖式Y221封隔器。闡述瞭該種封隔器的工作原理，併且針對封隔器膠筒的閤理壓重，對封隔器卡瓦的錨定力進行瞭校驗，對解封負荷進行瞭計算。此外，還設計瞭配套的自鎖式Y221封隔器的坐封工具，使得卸載壓重後，封隔器既不解封，油管掛還能順利坐入井口，實現管柱的入井迴接。由于在封隔器內部增加瞭自鎖機構及雙級解封機構，封隔器坐封後，噹釋放掉壓重時，封隔器依然能夠保持坐封狀態，封隔器上部管柱處于自由狀態，從而減少瞭抽油桿的上下行摩阻及抽油機負荷。但該管柱在自鎖方麵有其跼限性，即雖然可多次坐封，但隻能第1次坐封後可以自鎖，再次坐封後不能自鎖。
Y221봉격기엄범지응용재격추관주상，단상규Y221봉격기좌봉후，재압중작용하，봉격기이상적유관、빙통회재축향상만곡변형，가극관간편마，증가추유궤부하，침대차현상，연제료일충자쇄식Y221봉격기。천술료해충봉격기적공작원리，병차침대봉격기효통적합리압중，대봉격기잡와적묘정력진행료교험，대해봉부하진행료계산。차외，환설계료배투적자쇄식Y221봉격기적좌봉공구，사득사재압중후，봉격기기불해봉，유관괘환능순리좌입정구，실현관주적입정회접。유우재봉격기내부증가료자쇄궤구급쌍급해봉궤구，봉격기좌봉후，당석방도압중시，봉격기의연능구보지좌봉상태，봉격기상부관주처우자유상태，종이감소료추유간적상하행마조급추유궤부하。단해관주재자쇄방면유기국한성，즉수연가다차좌봉，단지능제1차좌봉후가이자쇄，재차좌봉후불능자쇄。
Y221 packer is extensively used in packer string, but when conventional Y221 packer is set, the tubing and pump cylinder above the packer shall bend and deform axially under the action of weight, which exacerbates eccentric wear on tubing and rod and increases the load on pumping unit. In view of this problem, a self-locking Y221 packer has been developed. This paper sets forth the working principle of this packer and veriifes the anchoring force of the packer slips in line with the proper weight of packer rubber tube and calculates the unlocking load. In addition, a setting tool for this self-locking Y221 packer has been designed, which ensures that the packer is not unlocked while the tubing hanger can successfully sit in the wellhead when the weight is removed, so the string is tied back in hole. A self-locking mechanism and duel-stage unlocking mechanism are added inside the packer, so after the packer is set and the weight is released, the packer can still stay set while the string above the packer is in a free state, hence reducing the up and down friction of the sucker rod and the load on pumping unit. However, this string has some limitation in its self-locking performance, that is, the packer can be set many times, but it can realize self-locking after it is ifrst set and cannot self-lock after being set twice.
