The circulating sub is connected between wellhead pipe string and ground circulating system. When casing is running or finished running, the circulating sub is connected to make fluid circulation. According to the application, the circulating sub is connected between Kelly and casing or between casing and hose. The former is used for fluid circulation during connecting of casing. The later generally is used after connecting of casing.
Construction
The circulating sub during running casing is equipped with casing pin thread on one end or DP thread and DP box thread or union thread on other end.
SPECIFICATION |
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General Specification |
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Size In. |
Max.WP / psi |
Manifold union |
THREAD |
4 1/2 |
8000 |
2” FIG 1502 |
BTC |
5 |
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5 1/2 |
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6 5/8 |
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7 |
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8 5/8 |
7000 |
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9 5/8 |
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10 3/4 |
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11 3/4 |
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13 3/8 |
5000 |
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16 |
3000 |
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18 5/8 |
2000 |
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20 |
ALL PRODUCTS CAN BE INSPECTED BY THIRS PARTY LIKE BV, SGS,TUV
Lake Petro company is a professional supplier of various oilfield equipment, including oil drilling and service equipment, oil production equipment, OCTG, wellhead & downhole tools and spare parts. Our products have already been exported to USA, South America, Africa, Middle East, Russia and some other countries (regions). Lake Petro company has become VIP (assigned) supplier and built strategic partnership with some countries' national petroleum companies.
Why you need to choose lake petro ?
As a professional oil and gas service company, Lake petro has many good experience is selling and serve for the oilfield industies,quality is the culture of the company, we provide the API and BV certifed products for customer.
Can you make us the best quality products as well as a good price.
Yes. we can give you really quality products with best price,we have a better understanding of Chinese market, with us your moeny will be safe.
What is special compare with other company ?
First, we provide the quality products, with BV and API certified, at the same time, we will provide the customer with the best service after sale, any time any where.