FIELD: hole drilling, pressure grouting of casing string. SUBSTANCE: hole in clay roof is completed. Sump of smaller diameter is made. Casing string with shoe is run into hole. Shoe is fitted with container carrying reagent-cement mortar setting accelerator. Shoe is placed above sump before pressure grouting. Cement mortar is injected. It is injected in portions having different time of setting. Finish of setting of one portion is start of setting of next portion. Separator and forcing fluid are injected till "stop" pressure is achieved. Casing string is forced into sump. Container is open. Reagent-cement mortar setting accelerator is injected into portion of cement mortar in zone of shoe. Process secures tightness of hole clearance and insulation of pools up to well-head, if necessary. EFFECT: higher efficiency of process. 1 cl
| Title | Year | Author | Number |
|---|---|---|---|
| PROCESS OF PRESSURE GROUTING OF WELL | 2000 |
|
RU2183253C2 |
| METHOD OF WELL CONSOLIDATION AND DEVICE FOR METHOD EMBODIMENT | 2000 |
|
RU2196879C2 |
| METHOD OF FORMATION OF INTERSTRATAL ISOLATION BRIDGING PLUGS IN WELL ANNULAR SPACE | 2001 |
|
RU2196875C1 |
| METHOD OF CEMENTATION TOP STAGE OF CASING PIPE IN WELL | 2008 |
|
RU2386013C1 |
| METHOD OF WELL STAGE CEMENTING | 2001 |
|
RU2199000C2 |
| WELL CEMENTING METHOD | 2022 |
|
RU2797167C1 |
| METHOD OF FASTENING THE WELL WITH LEADER IN THE SECTION OF PERMAFROST WITH HIGH ICE CONTENT | 2017 |
|
RU2662830C1 |
| DEVICE FOR FORMATIONS SEGREGATION | 2000 |
|
RU2182958C2 |
| METHOD TO PREVENT GAS FLOW VIA ANNULUS DURING WELL CEMENTING | 2006 |
|
RU2312973C1 |
| METHOD OF CEMENTING CASING PIPE OF GAS WELL UNDER CONDITIONS OF PERMAFROST ROCKS | 2006 |
|
RU2342517C2 |
