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Pony rods
Pony rods are sucker rods shorter than 25 ft, and they vary in length. They are most commonly placed adjacent to the polished rod at the top of the rod string, on top of the downhole pump for handling purposes, and on top of the polished rod with appropriate couplings to prevent the string from falling downhole if the polished-rod clamp slips. Old pony rods normally should not be used in the load-carrying part of a new rod strings. Thus, when placing the rod string with new suckers, new pony rods should be used.
| SIZE (in) |
ROD D (in) |
THREARD D (in) |
LENGTH (ft) |
OUTSIDE DIAMETER OF PIN SHOULDER (mm) |
LENGTH OF PIN (mm) |
LENGTH OF WRENCH SQUARE (mm) |
WIDTH OF WRENCH SQUARE (mm) |
| 5/8 | 5/8 | 15/16 | 2 4 6 8 10 12 14 25 30 |
31.8 | 31.75 | More than or equal to 31.8 | 22.20 |
| 3/4 | 3/4 | 1-1/16 | 38.10 | 36.50 | 25.40 | ||
| 7/8 | 7/8 | 1-3/16 | 41.30 | 41.28 | |||
| 1 | 1 | 1-3/8 | 50.80 | 47.63 | More than or equal to 38.1 | 33.30 | |
| 1-1/8 | 1-1/8 | 1-9/16 | 57.20 | 53.98 | More than or equal to 41.3 | 38.10 |
MECHANICAL PROPERTIES
| GRADE | YIELD STRENGTH REL (Mpa) |
TENSILE STRENGTH Rm(Mpa) |
PERCENTAGE ELONGATION A(%) |
CONTRACTION PERCENTAGE OF AREA Z(%) |
IMPACT TOUGHNESS ακ(J/cm2) |
| C | 414 | 620-793 | 12 | 55 | 70 |
| D | 620 | 794-965 | 10 | 50 | 58.8 |
| K | 414 | 620-793 | 12 | 55 | 70 |
- Technical information about our product.
- Production: Inform Product process to you every week.
- Product photo: Finished, before and after loading into container.
- Packing: Carton or according to your request.
- Service after shipment: You could find us 24 hours in a day.
Puyang Zhongshi Group Co., Ltd. is a member of Sinopec Corporation. As a national high-tech enterprise and scientific enterprise, we launch business in areas of science & technology, industry, and trade.
Our products have attained ISO9000 quality system certification. Some petroleum product machinery have passed the evaluation of API certification in the United States. Our products are exported to the Middle East, Europe, Africa and other overseas markets. We have registered in the Republic of the Sudan to set up a company.
Our group is located in Puyang City of Henan Province with beautiful landscape and convenient transportation. Puyang City has been granted titles of "China National Cultural City" and "China National Cultural City".
We persist in the policy of "technology is the guide and quality is our life". We believe that quality determines sustentation. We will provide customers with reliable and adaptable products and services on the basis of equality, mutual benefits and sincerity. We sincerely hope to develop friendly cooperation with both domestic and overseas colleagues, to create a prospect future together.
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