Workover in deep wells of 7000m

Workover operation refers to an operation of care and maintenance measures for oil drilling and subsequent well maintenance to ensure suc

Damaged casing repair and reinforcement

Casing repair in open hole, and casing repair in cased hole.

Workover of Fishing

Importation and improvement of fishing tools of rope-like fishes, such as: complex-type outer hooks of milling and fishing, high-strength lo

Horizontal well workover process

The main technical problem of horizontal well workover are: large friction, easily lead to weight indicator distortion, tension and torque i

Old well plugging removal technology

In the process of oil extraction, the polymer in the oil layer and solid particles and other substances carried by crude oil will, as time g

Drilling engineering services

Dragon drilling team are experienced with drilling vertical wells, horizontal wells, cluster wells and multi-lateral wells.

Plug & Perf Multi-Stage Fracturing Technology

This technology is applicable for vertical wells, highly-deviated wells and horizontal wells after cementing cased well and completion. Deta

Coil Tubing Hydra Jetting Multi-Stage Fracturing Technology

The Coil Tubing Hydra Jetting Multi-Stage Fracturing Technology combines the hydraulic sand blasting perforating technology and the annulus

Drillable Sliding-sleeve Open-hole Staged Fracturing Technology

This technology can isolate horizontal well into several sections with packer and sliding sleeve according to the need of reservoir develop

Retrievable Seat Sliding-Sleeve Open-hole Staged Fracturing Technology

This technology is applicable for 6" open holes.

Hydraulic Jetting Staged Fracturing Technology

This technology is applicable for horizontal wells with completed open hole, casing cementation and screen completion. For fracturing improv

Gravel Packing Sand Control Technology

This technology is suitable for offshore and onshore formation sand control when sand production is caused by unconsolidation, high oil and