DST tools 5" Tubing String Testing Valve
Size::5"
Type: Tubing String Testing Valve
Service: H2S, CO2
Working condition: High pressure high temperature(HPHT)
Working pressure: 10000psi ~ 15000psi
Condition: New
Application: oil well testing
Briefly Introduction
The tubing string testing (TST) valve is a full-opening valve used to pressure-test the workstring while running in the hole. The valve is operated after it is stung into a permanent packer or after a retrievable packer is set. The TST valve requires a differential pressure between the annulus and the tubing to shear. The TST valve can also be used for pipe flexing if it is run below an annulus pressure-responsive circulating valve.
The TST valve consists of:
• flapper valve and spring
• shear pin section
• locking dogs
Features and Benefits
• Flapper valve requires only 4 psi to open.
• Testing string can be pressure-tested as many times as required as it is run in the hole.
• Valve shear rating can be pre-determined at 500 psi increments.
• Valve can also be used for pipe flexing.
Operation
When the TST flapper valve opens, it allows the workstring to fill up. The shear pins hold the mandrel in place. The workstring can be pressure-tested as many times as required as it is run in the hole. While the workstring is stationary, a spring keeps the flapper valve closed. After the workstring pressure test is complete, the tool is sheared when annulus pressure is applied to the predetermined shear pin rating. (The shear rating can be adjusted in 500 psi increments to shear from 500 to 6,000 psi differential.) When the pins shear, the mandrel moves up and pushes the flapper open,allowing the locking dogs to engage. The tool is then fully open. The tool works on differential pressure between annulus and tubing. Failure to shear initially on application of annulus pressure is not critical. The process of drawing the well down also creates a pressure differential that helps the tool shear. When used for pipe flexing, the TST valve is run below an annulus pressure-responsive circulating valve, such as the RD circulating valve. The string is pressured up against the flapper valve as many times as required. The circulating valve is sheared after flexing operations are complete, and the workstring is pulled out dry.
Specifications:
1.Halliburton type, all could change with Halliburton parts.
2.All equipments are produced according to API standard.
Below are specfor you reference: 
KINGWELL INTRODUCTION
Xi'an KINGWELL OILFIELD MACHINERY Co., Ltd. (KINGWELL) is a highly reputable supplier for oilfield equipment and services to Oil & Gas industries and provides complete solutions.
With over 10 years developing, we were developed from the beginning drilling service to manufacture factory who produce OCTG, DST tools and Solid control products.
Design & Development
Kingwell has an ongoing relationship with Xi'an Petroleum University and built up long term cooperation with China Aerospace Group for more than 10 years. Design Department is familiar with CAD and Pro-E facilities and has on rolls qualified & experienced engineers. Now, they are engaged in development of new products as required in the market place. Kingwell' products are validated in-house in a Test Well, a Sub-surface Type Test Facility with simulated well conditions up to 15000 psi Differential pressure , 400°F and Max 450°F.
Manufacturing Facility
Equipped with latest machining facilities like CNC 3-axis Turning centers, CNC 4-axis milling centre, high temperature heat treatment furnaces, Centre lathe machines, Deep Hole Drilling, Boring & Honing machines, our company could meet long term production target and be governed efficiently by well-qualified and experienced Board of Directors and Engineers.
Inspection and Test Facilities
We own the world-class facilities with professional laboratory technicians. The main facilities are Surface Testing (Hydraulic Testing Unit), high temperature heat treatment furnaces, API Gages (Master & Working), Profile Projector, tensile testing machine, pressure sensor and data acquisition system, Universal Testing Machine, Hardness Tester, Nitrogen Pump, Function Test Pump, Ultrasonic Thickness Tester etc. All the goods must be tested by several processes and must be qualified when packed.
The followings are some pictures of Test Facility
Training and Field Supports
We have a team of well qualified and experienced field support personnel for Training. According to customer's requirements, we provide operation training service for our customers who purchase our products.
Generally speaking, our customer training mainly includes followings:
1) To know the basic knowledge of the products, such as the usage, the working environments, the working principles, the structure, ect.
2) To learn the operation and use of products.
3) To master the basic requirement of designs of tool strings and of testing operation.
Product delivery
Payment:TT/LC:30% advance payment.70%before shipment
Warranty: Warranty period is 1 year after installation.
Origin: China
Minimum order: 1 set
Packaging: wood case or steel carton
Delivery Date: within 1-2 month(s) after receiving prepayment
Logo: KW, we can produce according to customer requirements.
Technical Documents: We can provide technical documents according to your requirements.
Additional service: Customers are served to test our products in our factory upon request.
Service
We believe in Customer delight, achieved by the supply of Quality Products & Services and Continual Improvement in our Manufacturing Processes for timely delivery at competitive prices. We work in a professional, competitive, and cost-effective manner consistent with the Customer requirement
Any enquiry of above products or relative parts, PLS feel free contact back, and we will offer you a good price and show you our best service.
