FIELD: oil production industry, particularly for tubing string production recovery and preparation to operation.
SUBSTANCE: tubing string comprises threaded end parts, reinforced parts adjoining threaded end parts and having mounting seats for tubing string installation in mounting-and-demounting mechanism during operation thereof. Reinforced parts having lengths of 120 - 200 mm are spaced 0.3 - 0.5 mm from tubing string end. Located on reinforced part surfaces are corrugated strips, which are continuously applied on tubing string perimeter about axis thereof. Strip widths are not less than 0.5 mm. Average corrugation height W is 0.2 - 0.8 mm. Average radius R of strip valleys is 0.2 - 0.8 mm. Distance between neighboring strips along tubing string axis is not more than 20 mm.
EFFECT: increased surface life of tubing string.
5 cl, 5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| TUBING ROUND-TRIP DEVICE | 2008 |
|
RU2387789C2 |
| TUBING WITH HEAT-INSULATING COATING | 2022 |
|
RU2780036C1 |
| PRODUCTION WELL TUBING | 2016 |
|
RU2665663C2 |
| TUBING STRING WITH HEAT-INSULATING COATING | 2021 |
|
RU2766464C1 |
| TUBING WITH HEAT-INSULATING COATING | 2018 |
|
RU2704405C1 |
| MOUTH EQUIPMENT | 2003 |
|
RU2244097C1 |
| SEALING METHOD OF CAVITY OF PIPES AND ANNULAR SPACE OF WELL; PGU-2 ANTI-SYPHONAGE SEALING DEVICE; PK-1 WASHING COIL | 2013 |
|
RU2563845C2 |
| HYDRAULIC JACK BLOCK FOR CARRYING OUT REPAIR AND RESTORATION WORK TO REPLACE WELLHEAD EQUIPMENT | 2022 |
|
RU2780181C1 |
| MECHANISATION SYSTEM FOR LIFTING AND LOWERING OPERATIONS DURING OVERHAUL AND ROUTINE MAINTENANCE OF WELLS | 2010 |
|
RU2444608C2 |
| TUBING STRING AND METHOD OF TUBING ENDS STRENGTHENING AND ASSOCIATED MECHANISM | 2006 |
|
RU2327922C2 |
