Company ProfileXi'an Shanglin Oilfield Equipment Co.,Ltd
Product BrandChina Shanglin
Product TagsFishing Tools
The back-off sub also named back-off spear. There is usually a left hand thread for tool joint at the upper part of the body, while the expansion sleeve has right hand thread. The guide cone at the lower part can make the expansion sleeve of the sub conveniently screw the fish connection. Raising the drilling tool, the expansion sleeve can hold the fish firmly, then reversing.
Telephone+86 29 88368846
AddressRoom 10401, Building 31, Tangyuan Xiaoqu,No.69 Dianzi Zhengjie, Yanta District, Xi'an, China 710065