Drill stabilizer with variable diameter for engineering Drill stabilizer on sales,it including the center body of the stabilizer and a rolling bearing and two rolling bearings sleeved on the center body of the stabilizer, a number of sets of swing arm structures are hinged on the first rolling bearing and the second rolling bearing, each The structure of the group swing arm includes an upper support arm, a lower support arm and a guide shoe plate. One end of the upper support arm and the lower support arm is hinged with the guide shoe plate, and the other end is hinged with a rolling bearing. The middle part of the lower support arm is provided with a The pin hole, the lower support arm is hinged with the upper end of the ejector rod through the pin hole, the lower end of the ejector rod is hinged with three rolling bearings, the three rolling bearings are sleeved on the center body of the stabilizer, the three rolling bearings are fixedly connected with the oil cylinder, and the oil cylinder is fixed in the center of the stabilizer The outer side of the body. The present invention can increase the contact area between the Drill stabilizer on sales and the hole wall, so that the Drill stabilizer on sales can maintain stability.

The above is a brief introduction to the relevant knowledge of the variable diameter Drill stabilizer on sales for engineering drilling rigs.