FIELD: process engineering.
SUBSTANCE: invention relates to pipe rolling and can be used in production of oil-well pipes for preparation of oil-well and casing pipes for thread cutting. This method comprises pipe rolling and calibration of their ends at presses. Decreased metal input and higher quality of pipes are ensured by pipes rolling within the limits of tolerances for OD negative field. Calibration is performed by expansion of pipe 500 mm long end with the help of cylindrical male die at the rate of deformation within 3%. Then, OD of this end is squeezed by female die to required size.
EFFECT: decreased metal input and higher quality of pipes.
2 cl, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PREPARING HIGH-STRENGTH OIL PIPES WITH TEMPERATURE OF 500-720°C AFTER HEAT TREATMENT FOR THREAD CUTTING | 2012 |
|
RU2492009C1 |
| METHOD FOR END PREPARATION OF OIL GRADE PIPES FOR THREAD CUTTING | 2013 |
|
RU2555305C1 |
| SEAMLESS HOT ROLLED CASING TUBES ROLLING METHOD FOR CUTTING BUTTRESS THREAD | 2005 |
|
RU2303499C2 |
| PUNCH FOR DISPENSING END OF PIPE OF OIL SORTAMENT | 2016 |
|
RU2645839C2 |
| METHOD OF OILWELL TUBING PIPE-END UPSETTING | 2009 |
|
RU2414983C2 |
| METHOD FOR PRODUCTION OF STEEL PIPES FOR HIGHLY SEALED THREADED CONNECTIONS OF THE PREMIUM CLASS | 2022 |
|
RU2801805C1 |
| METHOD FOR ROLLING SEAMLESS HOT ROLLED CASING TUBES WITH BUTTRESS THREAD | 2005 |
|
RU2311239C2 |
| PRODUCTION OF SEAMLESS HOT-ROLLED CASING PIPES AT PRU WITH PILGER MILLS FOR THREAD CUTTING | 2013 |
|
RU2545928C2 |
| MANUFACTURING METHOD OF SEAMLESS HOT-ROLLED CASING PIPES WITH DIMENSIONS OF 508×11,1, 508×12,7 AND 508×16,1 mm ON TPU 8-16" PIPE ROLLING UNIT WITH PILGER MILLS IN STANDARD AND COLD-RESISTANT CONFIGURATIONS | 2013 |
|
RU2545957C2 |
| METHOD OF MAKING WELL CASING SIZED TO 244,5×7,9, 244,5×9 AND 244,5×10 mm AT PIPE ROLLING UNIT WITH PILGER MILLS | 2012 |
|
RU2508955C1 |
