FIELD: well cementing. SUBSTANCE: device for cementing casing strings has covering perforated member made in form of branch pipe with funnel at upper end, and taper at lower end, and seat for rope shutoff member, bushing channel located along axis and having landing conical surface corresponding to taper of branch pipe lower end. EFFECT: higher efficiency. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF CASING CEMENTING AND RELEVANT DEVICE | 0 |
|
SU1668638A1 |
| DEVICE FOR CASING CEMENTING | 1990 |
|
RU2017937C1 |
| AGGREGATE FOR A CONCRETE BRIDGE MOUNTING | 1991 |
|
RU2010950C1 |
| COUPLING FOR TWO-STAGE CEMENTING OF CASINGS | 0 |
|
SU1059136A1 |
| DEVICE FOR PRESSURE-TESTING OF TUBING IN WELL | 1991 |
|
RU2021474C1 |
| ARRANGEMENT FOR PREVENTING DRILLING MUD LEAKS | 0 |
|
SU1337511A1 |
| DEVICE FOR RUNNING IN AND CEMENTING LINERS | 0 |
|
SU581236A1 |
| DISCONNECTOR OF PIPE STRIG IN WELL | 0 |
|
SU1477895A1 |
| DEVICE FOR PREVENTING DRILLING MUD LEAKS | 0 |
|
SU592958A1 |
| ARRANGEMENT FOR RUNNING DOWN AND CEMENTING LINERS AND CASING SECTIONS | 0 |
|
SU581244A1 |
