http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1698677-A2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_900308496dcef00a3f9dff1e770de44d |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-18 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K- http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-08 |
| filingDate | 2005-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c1fb87a7ac277d4f51c883fcc3e0c82b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5c32074d7e7aecccf25b4f620383dce8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_393c3176243ec41724ba25ac7e613efd |
| publicationDate | 2006-09-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1698677-A2 |
| titleOfInvention | Method of increasing the low shear rate viscosity of well drilling and servicing fluids containing calcined magnesia bridging solids, the fluids and methods of use |
| abstract | The invention provides well drilling and servicing fluids, and methods of drilling, completing, or working over a well therewith, preferred fluids comprise an aqueous liquid, a water soluble polymer viscosifier (preferably xanthan gum), a polymeric fluid loss control additive (preferably a partially depolymerized partially crosslinked hydroxyalkyl ether derivative of starch or a hydroxyalkyl ether derivative of a partially crosslinked and partially depolymerized starch), a bridging agent comprising a particulate calcined magnesia that has an Activity Index greater than about 800 seconds, and an additive selected from the group consisting of citric acid, alkali metal salts of citric acid, ammonium citrate, and mixtures thereof in an amount sufficient to increase the low shear rate viscosity of the fluids, preferably from about 0.05-5 ppb, most preferably from about 0.15-3 ppb. The invention further provides a method of increasing the low shear rate viscosity of fluids which contain a water soluble polymer and a calcined magnesia bridging agent which has an Activity Index greater than about 800 seconds. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101798499-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101798499-A |
| priorityDate | 2004-12-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 124.