Tubing String Test Valve
2.Simple structure and easy maintaince.
The tubing string testing (TST) valve is a full-opening valve used to pressure test the tubing while running in the casing hole. Before running in the hole, the tubing above the TST valve can be pressure tested as many times as required. During the downhole operation, the valve cannot be closed once it was opened.
When the tool is running in hole to do the test, the master valve should be opened. When the pressure test for the tubing is finished, open the flapper by applying the annulus pressure, it also can close the well for the master valve (Tester valve) at the same time.
| Sizes | 3 7/8", 5" |
| Working pressure | 15k |
| Working temp | 400℉ |
| Connections | CAS/IF/EUE and others |
Your Professional Cased Hole Dst Tools Supplier
Baoji Changyou Petroleum Equipment Co., Ltd. specializes in the design, manufacture, and sales of oilfield drilling equipment, surface testing equipment, downhole well and formation testing equipment (including drill stem test/DST tools: mechanical and pressure control), and exploration equipment. Additionally, we provide research and development (R&D) services to clients with specific requirements.
Professional Team
Our technical department comprises over 10 highly skilled R&D personnel who possess extensive design expertise, practical experience, and field testing capabilities.
01
Advanced Equipment
The company is equipped with a wide range of testing and machinery processing equipment, enabling comprehensive inspection, testing, and processing capabilities.
02
Independent Intellectual Property Patents
As a professional equipment manufacturer, Changyou holds numerous patents with independent intellectual property rights, providing robust technical support to our clients.
03
Strict and Reliable Quality Control (QC) System
Each component undergoes rigorous inspections at every stage of production. We also welcome third-party inspections and certifications, such as those from SGS and BV.
04
Specification of Cased Hole Dst Tools
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Sizes |
6 3/8" |
4 1/2"-13 3/8" |
3 7/8", 5" |
3 7/8"-9 5/8" |
|
Working pressure |
10k |
10k |
15k |
15k |
|
Working temp |
400℉ |
400℉ |
400℉ |
400℉ |
|
Connections |
CAS/IF/EUE and others |
CAS/IF/EUE and others |
CAS/IF/EUE and others |
CAS/IF/EUE and others |
Types of Cased Hole Dst Tools
Storm Valve
The storm valve is used to close the well being drilled, but does not need to pull the drill pipe out of the borehole. This feature is particularly suitable for offshore drilling operations.
HP Surge Valve
The HP surge valve is a full opening annulus pressure operated valve for cased wells. The tool normally operates as a back pressure valve. The valve consists of two sections: the ball valve section and the working piston section.
Shear Pin Circulating Valve
In the cased well testing, the shear pin type reverse circulating valve is a special joint, which is equipped with a circulating pin and an O-ring.
Pump Out Circulating Valve
The pump out reverse circulating valve is a circulating valve opened with the help of external force after the test. After the pump out reverse circulating valve is opened, the reverse circulating can be carried out, and the circulating can also be carried out.
Applications of Cased Hole Dst Tools
Identifying reservoir fluids: Cased hole dst tools tools can help determine the type of fluids (oil, gas, water) present in the reservoir.
Assessing wellbore damage: Cased hole dst tools can help identify and quantify any damage to the wellbore that may be affecting production.
Evaluating reservoir saturation: Cased hole dst tools can help determine the amount of oil, gas, and water present in the reservoir.
Determining flow profiles: Cased hole dst tools can help determine where fluids are flowing within the reservoir.
Assessing well integrity: Cased hole dst tools can help ensure the well is properly sealed and that there are no leaks.
Optimizing perforating and completion programs: Cased hole dst tools data can be used to optimize the placement of perforations and the type of completion used in the well.
Safety Considerations for Cased Hole Dst Tools Testing
● Before any drill stem test, conduct a safety meeting of all personnel participating in the test. Discuss safety factors, wind direction and exits.
● Ask the well service company representative about any possible hazards that could arise during the test.
● Check BOP and choke lines to see that they are not plugged and are tied down properly.
● Be sure the derrick auxiliary escape device is installed and working properly.
● Be sure that the drilling mud is properly conditioned.
● Be sure that the fill-up lines are installed on the drilling nipple above the BOP to keep hole full of mud.
● See that the cellar is jetted if no drain is available.
● Check the water connections on the spray manifold.
Be used in a wide range of industries.
First we discuss order details, production details by email or TM.
Then we issue you an PI for your confirmation.
You will be requested to do pr-epaid full payment or deposit before we go into production.
After we get the deposit, we start to process the order. We usually need 7-15days if we don’t have the items in stock.
Before production has been finished, we will contact you for shipment details, and the balance payment.
After payment has been settled, we start to prepare the shipment for you.
Packaging and Shipping
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Packaging |
Wooden box Or customized according to customer requirements |
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Shipping |
We will help you to choose the best shipping way according to your detail requirements. By sea, by air, or by express, etc. |
Inspection Facilities
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QC Flow Chart
FAQ
Q: What are the main functions of cased hole DST toolsss?
A: Its main functions include establishing test conditions in cased holes, collecting reservoir fluid samples, measuring parameters such as reservoir pressure and permeability, and evaluating the potential production capacity and economic value of the well.
Q: What components do cased hole DST toolss usually consist of?
A: Cased hole DST toolss usually consist of packers, valves, pressure gauges, and other analytical tools. Packers are used to isolate the test area, valves are used to control fluid flow, and pressure gauges are used to measure reservoir pressure.
Q: What is the difference between cased hole DST toolss and Open Hole DST Tools?
A: The main difference lies in the application environment and test method. cased hole DST toolss are used in cased wells, while Open Hole DST Tools are used in uncased open hole wells. In addition, cased hole drill stem test tools may need to adapt to more complex wellbore environments, such as higher pressures and temperatures, and more complex fluid compositions.
Q: What are the advantages of cased hole DST toolss?
A: The advantages include the ability to accurately collect reservoir data in cased holes, evaluate well production potential, improve testing efficiency, and reduce testing costs. In addition, these tools have high reliability and durability and can work for a long time in harsh wellbore environments.
Q: How to choose the right cased hole DST toolss?
A: Selecting the right cased hole DST toolss requires consideration of multiple factors, including wellbore environment, test objectives, budget, etc. Operators should select tools with appropriate specifications and functions according to the specific situation and ensure that they comply with relevant safety standards and regulations.
Q: How to improve the test accuracy of Cased Hole DST?
A: Improving the test accuracy of Cased Hole DST requires multiple aspects. First, the accuracy and reliability of the test equipment should be ensured; second, appropriate test methods and parameters should be selected; finally, the analysis and interpretation of test data should be strengthened to draw more accurate conclusions.
As one of the most professional cased hole dst tools manufacturers and suppliers in China, we're featured by quality products and competitive price. Please rest assured to buy high-grade cased hole dst tools in stock here from our factory. Contact us for customized service.
