Kelly valve is a manually operated ball type valve for the drill stem, divided into upper and lower sections. The upper Kelly valve is connected between lower end of swivel and upper end of Kelly. The lower Kelly valve is connected between upper end of drill pipe and lower end of Kelly or lower end of Kelly saver subs. The Kelly valve can be opened or closed off by simply turning a special operating wrench 90° according to indicated direction.
The sealing principle for Kelly valve is to ensure a close seat between the ball and the ball seat. The lower seat is supported by a spring. The force provided by the spring keep the ball securely in place with lower seat. During normal drilling operation, the hole is kept unblocked by turning the stem to "on" position; In case of kick or blowout, turn the operating stem to "off" position to close off the internal bore of drill string, the kick or blowout accident is avoided due to a high pressure sealing situation between ball and the ball seat.
When ordering please specify:
Upper or Lower type;
Tool OD;
Working pressure: 5,000 / 10,000 / 15,000 psi;
Tool connection.
Specifications:
| Model |
O.D.(mm) |
Thread connection |
I.D. (mm) |
Working pressure
(Mpa) |
| XS-86 |
86 |
NC26 |
30 |
30,70,105 |
| XS-105 |
105 |
NC31 |
40 |
30,70,105 |
| XS-111 |
111 |
NC31 |
40 |
30,70,105 |
| XS-121 |
121 |
NC38 |
44.5 |
30,70,105 |
| XS-127 |
127 |
NC38 |
44.5 |
30,70,105 |
| XS-140 |
140 |
NC40 |
57.2 |
30,70,105 |
| XS-XS146 |
146 |
4-1/2 REG |
57.2/44.5 |
30,70,105 |
| XS-159 |
159 |
NC46 |
61 |
30,70,105 |
| XS-165 |
165 |
NC46 |
61 |
30,70,105 |
| XS-168 |
168 |
NC50 |
71.4 |
30,70,105 |
| XS-178 |
178 |
NC50,5-1/2 FH |
71.4 |
30,70,105 |
| XS-XS197 |
197 |
6-5/8 REG |
76.2 |
30,70,105 |
| XS-XS200 |
200 |
6-5/8 REG |
76.2 |
30,70,105 |
Mudanjiang Kaidi Petroleum Machinery Co., Ltd is a professional manufacturer in the field of petroleum machinery, boasting rich experience and excellent technical strength in the production of downhole petroleum drilling and production tools.
Our main products are downhole petroleum drilling and production tools, covering a variety of types and specifications, which can meet the various needs of different customers in the process of petroleum extraction. With advanced production equipment and exquisite production technology, we have strong production and machining capabilities, enabling us to efficiently and accurately complete the processing and manufacturing of various complex parts.
Notably, we specialize in custom - made services according to customers' drawings. No matter how unique and complex the customers' requirements are, our professional technical team, with rich experience and innovative ability, can customize products that meet their specific needs according to the drawings and requirements provided by customers, providing personalized solutions for them.
In terms of material processing, we have deep technical accumulation and professional advantages, especially in the processing of special materials such as nickel - based alloys and titanium alloys. These special materials have excellent properties such as high strength, corrosion resistance and high temperature resistance, which are suitable for the harsh petroleum extraction environment. We are proficient in the processing technology of these materials, which can give full play to their performance advantages and ensure the quality and reliability of products.
We always adhere to the business philosophy of "quality first, customer first", and have won the trust and support of our customers with high - quality products and services. In the future, we will continue to focus on technological innovation and product optimization in the field of petroleum machinery, continuously enhance our core competitiveness, and make greater contributions to the development of the global petroleum industry.
Contact for Technical Support:
LAURA Manager
FAQ for Oilfield Machinery Products
Q1:Do your products comply with API/ISO international standards?
Answer: Yes, our products fully comply with API Spec 7-1, API 6A, and are certified with ISO 9001.
Q2:How do we ensure quality?
Answer:Production samples are always made before mass production.
A final inspection is always conducted before shipment.
Q3:: Are you the manufacturer? What petroleum machinery products do you mainly offer?
Answer: Yes, we are a professional manufacturer integrating R&D, production and export with our own production base. Our main products include:
Fishing Tools (e.g., overshots, fishing spears, milling shoes
Drilling Tools (e.g., drill pipes, stabilizers, reamers)
Valves (e.g., gate valves, check valves, safety valves)
Other downhole equipment, etc.
For more details, please contact our sales team We also provide customized OEM solutions.
Q4:What is the warranty period? How to claim it?
Answer: 12-month warranty. Provide the serial number and fault description for a response within 48 hours.
Q5:Do you provide technical training or on-site support?
Answer: Free remote training is available. On-site support costs are negotiable.
Q6: What is the lead time for delivery?
Answer: 30 days for standard products; 60-90 days for customized orders (subject to complexity).
Q7: What shipping methods do you offer? How to track orders?
Answer: Sea express shipping available. Tracking number and link provided after shipment.
Q8: How do you package the products to prevent rust during sea shipping?**
Answer:Packaging includes anti-rust oil, vacuum sealing, wooden crates, and desiccants.*
Q9:Do you accept customized orders?
Answer: OEM is accepted. Submit detailed drawings or specifications for a quote.
Q10:How to get your latest product catalog?For any further detailed inquiries, please feel free to contact us .
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