| After-sales Service: | Online Support |
|---|---|
| Warranty: | Online Support |
| Certification: | ISO 9001:2000 |
| Power Source: | Hand Operation |
| Operation Pressure: | Hand Operation |
| Applicable Medium: | Crude Oil |
| Samples: |
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| Customization: |
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Class T and Class SM coupling for sucker rods are manufactured as per API Specification 11B. For the thread cutting, we are using cold form rolled by displacing rather than by removing of material for making the coupling thread. The thread rolling cutting results in a compressive stress at the root of the thread, giving maximum strength to the traditional weak point of cut-thread couplings.
Class T coupling is using AISI 5140 to manufacture.The coupling is coated using phosphate chemical treatment or black oxide on customer's request.For Class SM coupling, the spray metal is a specification hardening process and is applied on the base metal.
The couplings are available in full size, slim hole and over size.Also, combination couplings are available for different diameters (sub-coupling) for both Class T and Class SM couplings.
We recommend changing sucker rod couplings after three make-ups, provided the connection threads have been inspected and deemed acceptable for reuse.
Technical Parameters
| Size(in) | Coupling O.D W(mm) | Length L(mm) | Thread D.(in) | Length of Wrench Square | Hardness(HRA) |
| (mm) | |||||
| 5/8" | 38.1 | 101.6 | 15/16" | 31.8 | 56-62 |
| 3/4" | 41.28 | 1-1/16" | |||
| 7/8" | 46 | 1-3/16" | |||
| 1" | 55.6 | 1-3/8" | 38.1 | ||
| 1-1/8" | 60.33 | 114.3 | 1-9/16" |
Lake Petro company is a professional supplier of various oilfield drilling rig equipment, including oil drilling and service equipment,oil production equipment,OCTG ,wellhead & downhole tools and spare parts with API certification.
Advanced equipment and techniques
Long-term cooperative relationships with more than a hundred famous and large manufacturers in China
High quality products and the best services to meet the strict needs of our customers
The business philosophy of "people-oriented, customer first and reliability first"
Successfully exported to Europe, America, the Middle East, South Africa and Southeast Asia.
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 with API certification. Following the principle of "quality first, science and technology innovated, people oriented", every Lake Petro person is sparing no effort to provide the customers with best products and services. Through efforts of Lake Petro staff, our products have already been exported to USA, South America, Africa, Middle East, Russia and some other countries (regions). With super quality, reasonable price and professional service, Lake Petro company has become VIP (assigned) supplier and built strategic partnership with some coutries' national petroleum companies.
How to order?
Please send us your inquiry with detail item description or with Model number.
If there is no packing demand we take it as our regular exported standard packing.
We will offer you an order form for filling. We will recommend you the most suitable model according to information you offered.
You send us your detail requirement, we provide quotation to you.
Can I expect a quality products?
All the production and processing are strictly according to ISO 9001:2008 and API standard. At the same time, mature production technology ensuring the quality satisfy international request. We also welcome the third party inspection, such as BV, SGS and TUV.
The information you may like to know before Payment:
1. Methods of Payment:
T/T (Telegraphic Transfer) or L/C at sight
2. Shipping way
Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air
Bulk order: we suggest by air or by sea.
3. Quality Control
We have our own experienced QC.
There will be strict inspection and testing for every order before shipping out.
Suppliers with verified business licenses
Audited Supplier 
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