The utility model relates to the field of oil and gas field development engineering, in particular to a perforating gun. The utility model solves the problem that the perforating gun can not enter the direction after perforating the stratum. The perforating gun of the utility model comprises a gun body, a cartridge rack and a perforating bullet. A plurality of notches are arranged on the cartridge rack, and the perforating bullets are arranged one by one on the notch; three notches are in one group, and three notches are spirally distributed on the metal tube; the perforating bullets installed in the middle of each group of notches are perpendicular to the axis of the metal tube and are installed in each group of not The oblique mounting of perforating projectiles at both ends ensures that the surface formed by the three points of each group of perforating projectiles on the casing is perpendicular to the casing; the gun body is a metal tube; the outer surface of the gun is provided with an external blind hole corresponding to the perforating projectile one by one; the directional directional ring is an eccentric ring; the number of directional rings is two; and the two directional rings are respectively. The position of the two orientations is the same as the two ends of the gun body.
【技术实现步骤摘要】
一种射孔枪
本技术涉及油气田开发工程领域,具体涉及一种射孔枪。
技术介绍
水平井因其能增大油气层的裸露面积,增加油气产量,近年来在各大油气田已有较多应用,截止2013年,不包括中石化、中海油和延长石油的水平井数量,仅中石油水平井的数量就接近6000口,水平井适用于薄油层和裂缝性油藏,特别是对于近几年发展较快的页岩油、页岩气,更为适用。钻水平井的技术难度较大,投产前的射孔难度更大。对于普通直井的射孔,利用油管将射孔枪放入射孔段即可,但是对于水平井射孔,利用油管输送射孔枪下入水平段难度较大,目前采用泵送方式将电缆和射孔枪送入水平射孔段,泵送方式是在井口利用高压泵向井里打压液体,最后将射孔枪推入到水平射孔段。在各个水平射孔段,射孔弹的射孔方向应朝向油藏较厚方向,因其油藏对应井筒的方位不同,射孔弹射入的方向也不同,射孔段油层的方位可根据测井数据得出,射孔枪射孔弹射出方位可在工厂提前加工好,但是,射孔枪下入地层后,因射孔枪在套管内转动,无法保证射孔弹射进欲射的油藏;另外,传统的射孔枪内的弹架孔采用螺旋分布,射孔弹射出方向垂直于射孔枪轴线,这导致设在套管上两个同相位的孔间距较 ...
【技术保护点】
1.一种射孔枪,包括枪体(1),枪体(1)内设有弹架(2),弹架(2)上固定射孔弹(3),其特征在于:所述弹架(2)为一金属管,金属管上设有多个切口(21),射孔弹一一对应地安装在切口(21)上;三个切口(21)为一组,三个切口(21)螺旋地分布在金属管上;在每组切口中间安装的射孔弹垂直于金属管的轴线,安装在每组切口两端的射孔弹(3)斜向安装,保证每组射孔弹(3)射在套管(10)上的三个点形成的面垂直于套管(10);所述枪体(1)为金属管;所述枪体(1)外表面设有与射孔弹(3)一一对应的外盲孔(4);还包括定向装置,所述定向装置包括定向环(5),所述定向环(5)为偏心圆环, ...
【技术特征摘要】
1.一种射孔枪,包括枪体(1),枪体(1)内设有弹架(2),弹架(2)上固定射孔弹(3),其特征在于:所述弹架(2)为一金属管,金属管上设有多个切口(21),射孔弹一一对应地安装在切口(21)上;三个切口(21)为一组,三个切口(21)螺旋地分布在金属管上;在每组切口中间安装的射孔弹垂直于金属管的轴线,安装在每组切口两端的射孔弹(3)斜向安装,保证每组射孔弹(3)射在套管(10)上的三个点形成的面垂直于套管(10);所述枪体(1)为金属管;所述枪体(1)外表面设有与射孔弹(3)一一对应的外盲孔(4);还包括定向装置,所述定向装置包括定向环(5),所述定向环(5)为偏心圆环,所述定向环(5)的数量为两个,两个定向环(5)分别套设、固定...
【专利技术属性】
技术研发人员:李刚强,
申请(专利权)人:宝鸡通源石油钻采工具有限公司,
类型:新型
国别省市:陕西,61
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。