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Coiled Tubing Technology

Introduction of Yilong coiled tubing Service Center

At present, Yilong has 28 sets of advanced coiled tubing operating equipment, the advantages are mainly reflected in the following aspects:

1. The brand is imported Hydra or Chinese high-quality brand Jereh;

2. Injection head lifting capacity from 80000lbs to 140000lbs, speed control from 0.7m/min to 58m/min, adapter type from 1.25 inch to 3.5 inch, to meet the different well environment and characteristics;

3. Meet the API standard, the material resistance to H2S in line with the NACE-MR0175 standard, different pressure and different working conditions of wellhead blowout prevention device;

4. Intelligent operation, real-time displayed and recorded operation parameters, force analysis and fatigue simulation.

The Scope Of Yilong Coiled Tubing Service Center

Conventional well operation
1.Gas-lift
2.Wellbore Cleanout
3.Muti-Stage CoilFRAC
4.Acidizing
5.Plug Milling
6.Cutting
7.Fishing
8.Horizontal well testing and perforation
9.Set Bridge Plug
10.Completion pipe string

Sour Gas Filed Operation
1.Gas lift
2.Scale Removal
3.Water Shut off
4.Horizontal well testing

Brief Introduction to Coiled Tubing Unit (CTU)

Equipment advantages

Currently we have 5 sets of advance Coiled Tubing Units with the following aspects:

1.Advanced HR680&ZRT-100K injector;

2.Can easily switch between 1" to 2-3/8" system ;

3.The tripping speed of coiled tubing is extensively controlled from min 0.06m/min to max 60m/min;

4.With full-featured BOP;

5.The maximal pull up force is 45 tons and the maximal set-down force is 22.5 tons ;

6.Equipment meet NACE MR-0175 for HS Services

Simulation design

(1)Fatigue life tracking

The degree of fatigue of the coiled tubing by every ten inches and the life of each coiled tubing can be calculated by using the data collected from the Orion data acquisition system.

(2)Tubing forces

To measure the pressure and gravity of coiled tubing;

To calculate how much weight can be borne;

To calculate the force of pulling up coiled tubing in the horiz ontal well;

To calculate the force needed for fishing job.

(3)Stress

To calculate the construction safety limit in the well;

To take safety precautions when necessary according to the tubing conditions.

(4) Hydraulic simulation

To design solid particle flowback volume, tubing speed, cutting speed and fishing speed.

(5)Downhole tools configuration

In configurating downhold tools with the existing tool database or by creating specific database, users can not only manipulate the tools completely but can also save, print, input and output these downhole data.

Data acquisition

The following parameters can be collected, displayed, saved, copied and printed in the form of curves: tubing depth, tubing tripping speed, tubing weight, annulus pressure, inlet pressure, discharge volume of the injection and the cumulative injection volume at two bypass orifices.

(1)Real-time tubing forces monitoring

(2)Real-time detection over limits of tubing operation conditions

(3)Real-time tubing fatigue condition monitoring

Coiled tubing parameters

Coiled tubing specification
1.5″Coiled tubing	7000m	Two reels
1.75″ Coiled tubing	6500m	One reel
2″ Coiled tubing	5000m	Three reels
2.375″ Coiled tubing	3800m	One reel

Matching operation tools

(1)Standard tools

①Tubing connectors: “external slip” type, “dimple-on” type and “roll-on” type.

② Motorhead assembly: double flapper check valve, releasing sub and circulating sub.

(2)Auxiliary tools

①Centralizer: bow spring, hydraulic centralizer

②Torque through knuckle joint

③Special joints: rotating joint

④Operating and cleaning tools

⑤Bumping tools

⑥Milling tools

⑦Fishing tools

Technical Support

The company has built strategic partnerships with several large oil service enterprises and research institutions through in-depth cooperation with them, so as to supply guarantees for the company to quickly master the world’s advanced technologies and provide high quality and efficient technologies and services.

Standardized Management

Various management systems have been established, for example: QHSE Management System, Equipment Maintenance and Operations Procedure, Post Responsibility System and Quality and Safety Supervision and Management System.

(1)Working procedure specification: detailed operation procedures have been established to standardize the admission of the materials, construction design, construction quality management and control as well as construction safety management.

(2)“Three-standardization” management specification: standardized site, standardized operation and standardized management.

The Operating Performance of Coiled Tubing

In various oilfields across China, particularly in the southwest shale gas region, we offer coiled tubing services at different stages of oilfield development and extraction, accumulating over 2200 well interventions.

We provide coiled tubing services at an oilfield in Kazakhstan, primarily involving coiled tubing drag fracturing services and velocity string services, with over 1500 well interventions to date.

In Algeria, we have provided coiled tubing services for consortia and national oil companies, with a track record of 6 years and over 3500 well interventions.