Drilling and completion technology for multilateral wells

Branch well technology based on expandable tube positioning is a systematic engineering technology involving drilling, completion and downhole operation, including sidetracking, branch well cementing, communication between main and branch wells, oil production, selective re-entry and stimulation operation and supporting tool system. Its purpose is to increase the oil drainage area, increase oil production and reduce the development cost of reservoir.

At present, it can provide 5-1 / 2 ", 7" and 9-5 / 8 "branch well series tools and engineering technical services. art

1. The operation is simple, the signal of each process is obvious, and the driller is easy to judge;

2. It can drill multiple multilateral wells;

3. After completion, the diameter of the main wellbore is large, which does not affect the follow-up operation;

4. Conventional production string can be run in;

5. It can selectively enter multilateral well.

1. Two 4-level 7 "sidetracking lateral horizontal wells have been successfully drilled in Chengbei oilfield, Bohai Sea;

2. A 4-level 9.5 / 8 "multilateral horizontal well was successfully drilled in Nanpu oilfield, Bohai Sea;

3. A 3-stage 7 "double branch fractured horizontal well was successfully drilled in Sulige gas field;

4. Two grade 3 7 "dual branch re-entry acidizing horizontal wells have been successfully drilled in Iran.