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Drilling technical service

Mud Motor Steerable Drilling Technology/M/LWD System/Rotary Steering System/Motary Steerable System

Workover

Workover operation refers to an operation of care and maintenance measures for oil drilling and subsequent well maintenance to ensure successful well use. With continuous development of oil fields, oil-well failures may occur during natural flowing, oil pumping or water injection process due to various factors and at this time, normal production can only be restored through workovers to replace downhole equipment and adjust parameters of the well. Workover process is developed with the extension of oilfield development time and the development of oil production process. Workover process was formerly a part of the oil production process and as for the need of process where the well structure may be changed, such as drilling, grinding, cementing and other processes plus some of the drilling process and parameters, so workover has developed into an independent process on the basis of drilling process and oil production. As for the project difficulty and high technical requirements demands large workover equipment with overhaul drill pipes, turntables and other special equipment, therefore, only professional process company of certain strength can be engaged in the workover.

Coiled Tubing

Coiled tubing gas-lift/sand washing and broken down/Bottom setting and dragging staged fracturing/Horizontal well drag acidifi cation/Coiled tubing bridge plug milling/6Coiled tubing cutting

Snubbing Service

Snubbing refers to a workover operation, by which specialized equipment are utilized to operate on live wells. During snubbing operation, wellbore pressure can be maintained, and thus eliminate the necessity of well killing (washing) and pressure release. For oil wells, the greatest advantage of snubbing operation is that, original formation pressure is preserved, which effectively protects formation pressure, avoiding pollution to oil reservoir, reducing the times of acidification, fracturing and other well stimulation, and finally providing favorable conditions for long-term development and stable production of oil and gas fields. For high-pressure oil and gas wells, the process of stopping injection and bleeding off are not required prior to operations, which shortens construction duration, saves the costs of kill fluid required for conventional operations and accessary equipment, abates pollution and finally protects the environment.For shale gas wells, well killing is avoided, which can reduce the pollution to shale gas formation, and effectively prevent gas reservoir from over-killing and formation damage.

Completion&Fracturing

Plug & Perf Multi-Stage Fracturing Technology/Coil Tubing Hydra Jetting Multi-Stage Fracturing Technology/Retrievable Seat Sliding-Sleeve Open-hole Staged Fracturing Technology

Pumpdown perforating

Mainly used for shale gas development,Providing more favorable environment for fracturing.

Measuring And Testing

HPHT high sulfur-bearing well PLT/CBL/VDL/Ultrasonic detecting technology for downhole leak source

Slick line

YILONG has 15 sets of slick line vehicles worldwide, YILONG has received high praise and recognition from internationally renowned companies such as Shell, Rock Oil, Chevron, etc. multiple times.

EPF

Our EPF solutions are compact, modular, and highly flexible, enabling rapid deployment and efficient operation. YILONG currently operates in multiple oil and gas fields of PetroChina and Sinopec, with a fleet of 26 natural gas EPF units and 31 crude oil EPF units. We are committed to delivering fast, economical, flexible, and transitional production solutions that meet the evolving needs of our clients.