http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102720465-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0914ffb893f64eef5b2dee741a7483a7 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B36-00 |
| filingDate | 2012-06-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-06-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_235c26fbaf832aacd751eef8c3c69703 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e497bd9bd50377b11c846c1c5686647a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eef26ea7dd27080fcaf101c5d9f0e0a3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1160923efc3970c4f30e3b17fca48caa http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a82bfc2792128ccbcf88da6ec294ad61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e320baf039de30a34da53a4af68108f7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_192b903ad7c3f254b9bfb315f641dda1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_62647b353e4f00cad3515a30e6ba4949 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_885d22d15a7fe84b4840b3435ce56c94 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dbfbc7ec3d9f6ae754a7e6dbd3a999f2 |
| publicationDate | 2015-06-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102720465-B |
| titleOfInvention | Method for forcibly unfreezing frozen hole |
| abstract | The invention discloses a method for forcibly unfreezing a frozen hole and belongs to the technical field of water prevention and control of pitshaft. According to the method, a hot water boiler, two hot salt water boxes and two fresh water boxes are provided for forcibly unfreezing an annular space between a frozen pipe and a drill hole. The method comprises the following steps of: parallelly arranging six piping centrifugal pumps at the hot water outlet of the hot water boiler; building ground ovens below the two hot salt water boxes so as to recycle salt water in a system, and parallelly arranging six piping centrifugal pumps at the outlets of the two hot salt water boxes; and parrellelly arranging four piping centrifugal pumps at the outlets of the two fresh water boxes so as to replace salt water in the system. The method for forcibly unfreezing the frozen hole comprises an early frozen hole unfreezing step and a later frozen hole freezing step. The method has the advantages that the subsequent perforating and grouting and plugging of the annular space between the frozen pipe and the drill hole can be facilitated, a channel through which the upper formation water flows down is effectively plugged, and the problem that the overlying formation water pours into the pitshaft is solved. |
| priorityDate | 2012-06-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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