API Downhole Drilling Circulating Sub with Drill Pipe Thread/Hammer Union Thread

• Customization: Available
• After-sales Service: Lifetime Support
• Warranty: 12months
• Model NO.: J030701
• Manufacturing Process: CNC Milling
• Surface Treatment: Spray-Paint
• Operation Pressure: Atmospheric Pressure
• Material: Alloy
• Transport Package: Wooden
• Specification: API
• Trademark: KAIDI
• Origin: China
• HS Code: 8401100000

Product Description

The Circulating Sub is connected between wellhead pipe string and ground circulating system. When casing is running or completed, the circulating sub can be connected to provide fluid circulation.
According to the application, circulating sub is connected between
Kelly and casing or between casing and a hose.

Construction
The circulating sub during running casing is equipped with casing
pin thread on one end and DP thread, DP box thread or union thread on the other.
Specifications - Circulating Sub With Drill Pipe Thread

Thread/ Model			I.D. (mm)	Length (mm)
Drill pipe box connection	Casing thread	Product Code
NC38	5 BTC	J030701	57	580
	5 LTC	J030702
	5 STC	J030703
NC38	5 1/2 BTC	J030801	57	580
	5 1/2 LTC	J030802
	5 1/2 STC	J030803
NC50	7 BTC	J031201	71	610
	7 LTC	J031202
	7 STC	J031203
NC50	9 5/8 BTC	J031801	71	610
	9 5/8 LTC	J031802
	9 5/8 STC	J031803
NC50	10 3/4 BTC	J031901	71	610
	10 3/4 STC	J031902
NC50	13 3/8 BTC	J032001	71	650
	13 3/8 STC	J032002

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.