人民新聞網今日獲悉：P110石油套管是石油鉆探用重要器材，其主要器材還包括鉆桿、巖心管和套管、鉆鋌及小口徑鉆進用鋼管等。國產套管以地質鉆探用鋼經熱軋或冷拔制成，鋼號用“地質”(DZ)表示，常用的套管鋼級有DZ40、DZ55、DZ753種。
(1)石油套管主要進口國家有：德國、日本、羅馬尼亞、捷克、意大利、英國、奧地利、瑞士、美國，阿根廷、新加坡也有進口。進口標準多參照美國石油學會標準API5A，5AX，5AC。鋼級是H-40，J-55，N-80，P-110，C-75，C-95等。規格主要為139.77.72R-2，177.89.19R-2，244.58.94R-2，244.510.03R-2，244.511.05R-2等。
(2)API規定長度有三種：即R-1為4.88～7.62m，R-2為7.62～10.36m，R-3為10.36m至更長。
(3)部分進口貨物標有LTC字樣，即長絲扣套管。
(4)從日本進口套管除采用API標準外，還有少部分執行日本廠方標準(如新日鐵、住友、川崎等)，鋼號是NC-55E，NC-80E，NC-L80，NC-80HE等。
(5)在索賠案例中，出現過黑扣、絲扣損傷，管體折疊，斷扣和螺紋緊密距超差，接箍J值超差等外觀缺陷及套管脆裂、屈服強度低等內在品質問題。
用于石油井鉆探。
按SY/T6194-96“石油套管”分短螺紋套管及其接箍和長螺紋套管及其接箍兩種。
(1)國產套管按SY/T6194-96規定，套管長度不定尺，其范圍8-13m。但不短于6m的套管可以提供，其數量不得超過20%。
(2)套管的內外表面不得有折疊、發紋、離層、裂紋、軋折和結疤。這些缺陷應完全清除掉，清除深度不得超過公稱壁厚的12.5%。
(3)接箍外表面不得有折疊、發紋、離層、裂紋、軋折、結疤等缺陷。
(4)套管及接箍螺紋表面應光滑，不允許有毛刺、撕破及足以使螺紋中斷影響強度和緊密連接的其他缺陷。
(1)按SY/T6194-96規定。套管及其接箍采用同一鋼級。含硫量<0.045%，含磷量<0.045%。
(2)按GB222-84的規定取化學分析樣。按GB223中有關部分的規定進行化學分析。
(3)美國石油學會ARISPEC5CT1988第1版規定。化學分析按ASTME59最新版本制樣，按ASTME350最新版本進行化學分析。
(1)按SY/T6194-96規定。作壓扁試驗(GB246-97)拉力試驗(GB228-87)及水壓試驗。
(2)按美國石油學會APISPEC5CT1988年第1版規定作靜水壓試驗、壓扁試驗、硫化物應力腐蝕開裂試驗、硬度試驗(ASTME18或E10最新版本規定進行)、拉伸試驗、橫向沖擊試驗(ASTMA370、ASTME23和有關標準最新版本規定進行)、晶粒度測定(ASTME112最新版本或其他方法)。
按SY/T6194-96規定，國產套管應以鋼絲或鋼帶捆扎。每根套管及接箍螺紋的露出部分均應擰上保護環以保護螺紋。
其他編輯
按美國石油學會標準APISPEC5CT1988年第1版，套管鋼級分H-40、J-55、K-55、N-80、C-75、L-80、C-90、C-95、P-110、Q-125共10種。
套管應帶螺紋和接箍供貨，或按下述任一管端形式供貨：
平端、圓螺紋不帶接箍或帶接箍，偏梯形螺紋帶接箍或不帶接箍，直連型螺紋、特殊端部加工、密封圈結構。
People's News Network learned today that P110 oil casing is an important equipment for oil drilling. Its main equipment also includes drill pipe, core pipe and casing, drill collar and steel pipe for small diameter drilling. Domestic casing pipes are made of hot-rolled or cold-drawn steel for geological drilling, and steel numbers are indicated by " geology" ( dz ). there are dz40, dz55 and dz753 kinds of commonly used casing pipes.
( 1 ) The main oil casing importing countries are Germany, Japan, Romania, Czech Republic, Italy, UK, Austria, Switzerland, US, Argentina and Singapore. Most import standards refer to api gravity Standard API5A, 5AX, 5AC. The steel grades are H - 40, J - 55, N - 80, P - 110, C - 75, C - 95, etc. The specifications are mainly 139.77.72 r - 2, 177.89.19 r - 2, 244.58.94 r - 2, 244.510.03 r - 2, 244.511.05 r - 2, etc.
( 2 ) There are three kinds of API specified lengths: R - 1 is 4.88 ~ 7.62 m, R - 2 is 7.62 ~ 10.36 m, and R - 3 is 10.36 m to longer.
( 3 ) Some imported goods are marked with LTC words, i.e. filament buckle sleeves.
( 4 ) In addition to adopting API standards for imported casings from Japan, there are a few Japanese factory standards ( such as Nu Skin Steel, Sumitomo, Kawasaki, etc. ), with steel numbers of NC - 55E, NC - 80E, NC - L80, NC - 80HE, etc.
( 5 ) In the claim case, there have been some appearance defects such as black buckle and thread damage, pipe body folding, poor tight spacing between broken buckle and thread, poor J value of coupling, and internal quality problems such as casing embrittlement and low yield strength.
Used for drilling oil wells.
According to SY / T 6194 - 96 " Oil Casing", short threaded casing and its coupling, long threaded casing and its coupling are classified.
( 1 ) Domestic casing pipe is in accordance with SY / T 6194 - 96, and the length of casing pipe is variable and its range is 8 - 13m. However, casings not shorter than 6m can be provided, and the quantity shall not exceed 20 %.
( 2 ) The inner and outer surfaces of the casing shall not have folds, hairlines, delaminations, cracks, rolled folds and scars. These defects shall be completely removed, and the removal depth shall not exceed 12.5 % of the nominal wall thickness.
( 3 ) The outer surface of the coupling shall not have defects such as folding, hairline, delamination, crack, rolling, scabbing, etc.
( 4 ) The thread surface of the casing and coupling shall be smooth and free from burrs, tears and other defects sufficient to cause thread interruption to affect strength and tight connection.
( 1 ) According to SY / T 6194 - 96. The casing and its coupling are of the same steel grade. Sulfur content < 0.045 %, phosphorus content < 0.045 %.
( 2 ) Take chemical analysis samples according to GB 222 - 84. Chemical analysis shall be carried out in accordance with relevant provisions in GB 223.
( 3 ) api gravity ARI SPEC 5 CT 1988 1st edition regulation. Chemical analysis shall be carried out according to the latest edition of Astme 59, and chemical analysis shall be carried out according to the latest edition of ASTM E350.
( 1 ) According to SY / T 6194 - 96. Flattening test ( GB 246 - 97 ) tensile test ( GB 228 - 87 ) and hydraulic test were carried out.
( 2 ) Hydrostatic test, flattening test, sulfide stress corrosion cracking test, hardness test ( AST ME18 or E10 latest edition ), tensile test, transverse impact test ( ASTMA 370, ASTM E23 and related standards latest edition ), grain size determination ( ASTME 112 latest edition or other methods ) shall be carried out according to api gravity API Spec 5 CT 1988 1st edition.
According to SY / T 6194 - 96, domestic sleeves should be tied with steel wire or steel belt. The exposed part of each casing and coupling thread shall be screwed with a protective ring to protect the thread.
Other editors
According to the first edition of api gravity Standard API Spec 5 CT in 1988, there are 10 kinds of casing steel grades H - 40, J - 55, K - 55, N - 80, C - 75, L - 80, C - 90, C - 95, P - 110 and Q - 125.
Casing shall be supplied with threads and coupling, or in the form of any of the following pipe ends:
Flat end, round thread with or without collar, partial trapezoidal thread with or without collar, direct-connected thread, special end processing, sealing ring structure.
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