API Drilling Tool Drilling Junk Sub LB219 6 5/8 in. REG
Overview: Drilling junk sub is able to run in the well to get out deciduous gear, broken gear and bullet of the bit left in the well. It is mainly made up of the body and the barrel through a welding process. It is installed between the bit and the drill collar. When downhole metallic particles are rushed over the barrel of the sub by the large displacement, they will sink into the barrel due to the broadening of the upward backflow passageway of the drilling fluid and its speed decrease. Pumping termination shall be adopted for the fishing of downhole junk with relatively small granularity, which will sink into the sub drawn by its own weight. Product structure: drilling junk sub is made up of body and barrel. This product is designed and manufactured in accordance with relevant national, industrial and API 7-1 standards.
1. High-strength
2. API Standard
3. Excellent Cost Performance
Major technical parameters and dimensions:
Model | OD of fishing junk sub mm(in.) | Code of sub thread | Applicable diameter of well mm(in.) | |
Upper | Lower | |||
LB219-6 5/8 in. REG | 219 (8 5/8 ) | 6 5/8 in. REG | 6 5/8 in. REG | 244-289 (9 5/8-11 3/8 ) |