Horizontal well segmented substitution well killing method and device
The invention discloses a horizontal well segmented substitution well killing method and device. The horizontal well segmented substitution well killing method comprises the particular steps that whena horizontal well is drilled to a horizontal segment and gas invasion occurs, well shut-in treatment...
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| creator | XIA WEI WANG PENG LI YIMING CHEN ZE'EN |
| description | The invention discloses a horizontal well segmented substitution well killing method and device. The horizontal well segmented substitution well killing method comprises the particular steps that whena horizontal well is drilled to a horizontal segment and gas invasion occurs, well shut-in treatment is carried out, and the pressure condition of a casing is monitored; when the pressure of the casing achieves a preset threshold value, the current well shut-in casing pressure and the well shut-in stand pressure are obtained; the well shut-in casing pressure and the well shut-in stand pressure are used as a standard, the changing condition of the casing in a preset period is monitored, and when the casing pressure is on the rise, gas in a vertical well segment of the horizontal well is subjected to substitution discharging by a volumetric approach; when the casing pressure in the preset period does not rise, well killing fluid is injected into the horizontal segment of the horizontal wellthrough a drilling string |
| format | Patent |
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The horizontal well segmented substitution well killing method comprises the particular steps that whena horizontal well is drilled to a horizontal segment and gas invasion occurs, well shut-in treatment is carried out, and the pressure condition of a casing is monitored; when the pressure of the casing achieves a preset threshold value, the current well shut-in casing pressure and the well shut-in stand pressure are obtained; the well shut-in casing pressure and the well shut-in stand pressure are used as a standard, the changing condition of the casing in a preset period is monitored, and when the casing pressure is on the rise, gas in a vertical well segment of the horizontal well is subjected to substitution discharging by a volumetric approach; when the casing pressure in the preset period does not rise, well killing fluid is injected into the horizontal segment of the horizontal wellthrough a drilling string</description><language>chi ; eng</language><subject>EARTH DRILLING ; EARTH DRILLING, e.g. DEEP DRILLING ; FIXED CONSTRUCTIONS ; MINING ; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS</subject><creationdate>2019</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20190719&DB=EPODOC&CC=CN&NR=110029935A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20190719&DB=EPODOC&CC=CN&NR=110029935A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>XIA WEI</creatorcontrib><creatorcontrib>WANG PENG</creatorcontrib><creatorcontrib>LI YIMING</creatorcontrib><creatorcontrib>CHEN ZE'EN</creatorcontrib><title>Horizontal well segmented substitution well killing method and device</title><description>The invention discloses a horizontal well segmented substitution well killing method and device. 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| subjects | EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS |
| title | Horizontal well segmented substitution well killing method and device |
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