Curve guide shoe for sub-well re-propelling

• Main Author: RUOMING,LI CHEN
• Format: Patent
• Language: English
• Published: 31.01.2007
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model relates to a branch well drilling and completion operation tools of the oil-gas field, especially a curve guide shoe for sub-well re-propelling comprising a casing sleeve (1), a casing (2) and a guide shoe head (3) which are connected by screw thread in turn. THe front part of the guide shoe head is circular-arc, the axes of the casing sleeve, the casing and the guide shoe head are not in the horizontal line, the casing sleeve has a certain angle bending to one side at the position suitable distance away from the guide shoe head. This utility model is used in the sub-well hole re-propelling, because this device and the well completion string or the tubing can be propelled together without using the special whipstock in the tubing or the well completion string, the operation time is saved and the construction program is simplified, thus the operation risk is reduced.