Polished rod is a kind of designed rod easy to make pressure seal in the stuffing box, and it is a mechanical connection for equipments of inner well and outside well. There is special requirements of toughness for the polished rod. We design and manufacture the polished rod as per API 11B Specification. According to different well condition, we can manufacture normal polished rod, Spray Metal Polished Rod, even Chrome Plated Polished Rod.
| General Dimensions and Tolerances for Polished Rod | |||||||
| Nominal Size | 1-1/8 (in) | 1-1/4 (in) | 1-1/2 (in) | ||||
| in. | mm | in. | mm | in. | mm | ||
Outside Diameter | Dimension | 1.125 | 28.58 | 1.25 | 31.75 | 1.50 | 38.10 |
| Tolerances | +0.005 -0.010 | +0.13 -0.25 | +0.005 -0.010 | +0.13 -0.25 | +0.005 -0.010 | +0.13 -0.25 | |
Nominal Diameter of Pin- thread | Dimension for referance | 0.938 | 23.83 | 1.188 | 30.18 | 1.375 | 34.93 |
| 1.063 | 27.00 | ||||||
Note:sizes of sucker rods with which used | Nominal Dimension (for referance) | 5/8 | 7/8 | 1 | |||
| 3/4 | |||||||
Note: Standard lengths | Dimension | ft 8,11,16,22,26,30 36,40 | m 2.4,3.4,4.9,6.7,7.9,9.1,11.0,12.2 | ft 8,11,16,22,26,30 36,40 | m 2.4,3.4,4.9,6.7,7.9,9.1,11.0,12.2 | ft 8,11,16,22,26,30 36,40 | m 2.4,3.4,4.9,6.7,7.9,9.1,11.0,12.2 |
| Classification and Mechanical Properties for Polished Rod | ||
| No. | Material (AISI Series Steel) | Tensile Strength |
| a) | Carbon Steel: AISI 1035-1050 | 90,000 Psi to 160,000 Psi (621Mpa to 1,103Mpa) |
| b) | Stainless Steel: AISI 304/316/431 | ≥95,000 Psi for 304/316 (≥482Mpa) ≥90,000 Psi for 431(≥620Mpa) |
| c) | Alloy Steel: 1) AISI 4120-4140 2) AISI 4315-4340 3) AISI 4615-4625 4) AISI 8620-8630 | 95,000 Psi to 160,000 Psi (655Mpa to 1,103Mpa) |
| Spray Metal Polished Rod Parameters | ||||
Spray Metal Polished Rod Coating Thickness | Spray Metal Polished Rod Coating Hardness | Chemical Composition for Polished Rod | ||
| Elements | Minimum Weight Percent | Maximum Weight Percent | ||
0.008in to 0.020 in (0.20mm to 0.51mm) | ≥480 HV200 | Carbon | 0.50 | 1.00 |
| Silicon | 3.50 | 5.50 | ||
| Phosphorus | 0.00 | 0.02 | ||
| Sulfur | 0.00 | 0.02 | ||
| Chromium | 12.00 | 18.00 | ||
| Boron | 2.50 | 4.50 | ||
| Iron | 3.00 | 5.50 | ||
| Cobalt | 0.00 | 0.10 | ||
| Titanium | 0.00 | 0.05 | ||
| Aluminum | 0.00 | 0.05 | ||
| Zirconium | 0.00 | 0.05 | ||
| Nickel | Remainder | |||
| Note:The finished outside diameter of sprayed metal polished rods shall conform to general dimensions and tolerances for polished rod,except the tolerance on the OD between pin end and start of sprayed metal shall be +0.005in./-0.040in.(+0.13mm/-1.02mm). | ||||
