Velocity String

Descripción del producto

In simple terms, Velocity String is a type of small-diameter string normally applied in wellbore of gas wells to throttle and speed up fluid.
Many flowing oil and gas wells experience decreased production over time, and eventually can stop producing completely. 

Factors causing this problem include declining reservoir pressure and gas velocities and liquid loading preventing reservoir fluids from entering thewellbore. Thus now many fields have installed a small diameter coiled tubing string (velocity or siphon string) to restore a well that isliquid loadedback to flow production. Deployed by coiled tubing (CT) device, connected by specialized wellhead tool, and with advancedly-designed length, 1.0~2.0CT will be hung into the original production tubing in the well to form new production string. Considering different production status, generally two production methods will be applied- gas production via CT or gas production via annulus between CT and production tubing.

 

The rationale behind installing a velocity string of smaller diameter than the production tubing is to reduce the cross- sectional flow area. The smaller cross-sectional flow area increases the gas velocity in the tubing. The higher gas velocity at the bottom of the tubing provides more transport energy to lift liquid up out of the well. Liquid no longer accumulates at the bottom of the well, and production is sustained.

Wellhead Tools                                                                                 

1.    CT hanger system                                                                                                                                  

2.    Hanger spool                                                                                                                                           

3.    Gate valve                                                                                                                                               

4.    Flange                                                                                                                                                     

5.    Needle valve                                                                                                                                           

6.    Sealing device                                                                                                                                        

7.    AMMT slip connector

 

Down-hole Tools

1.    Landing nipples

2.    Pump out sub below down hole plug 

3.    Bottom slip connector

4.    CT Pump out plug 

5.    Down-hole plug for Landing nipple 

6.    Retrievable landing seat

Quality is the core of Brighter Oil Group, thus for our Coiled Tubing equipment we partnered Tenaris, Tenaris is the first API 5ST certified coiled tubing manufacturer in the world, setting a new standard for manufacturing and testing of coiled tubing in the industry. Todays oil and gas industry requires products that meet stringent specifications to promote reliability in the field. Tenaris has a company-wide Quality Management System, which includes ISO****1, making Tenaris the only coiled tubing producer in the industry to hold this certification. The coiled tubing produced by Tenaris is high frequency induction welded while stainless steel products are laser welded to ensure maximum precision and durability.

The use of coiled tubing for oil and gas well service operations has increased significantly over the past *0 years for applications such as shales, tight gas and tight oil. We can provide you Tenaris Coiled Tubing for the following applications