{"id":3934,"date":"2021-05-24T02:54:23","date_gmt":"2021-05-24T02:54:23","guid":{"rendered":"https:\/\/www.wldsteel.com\/?p=3934"},"modified":"2021-08-05T08:38:16","modified_gmt":"2021-08-05T08:38:16","slug":"oil-casing-pipe-uses-in-oil-and-gas-wells","status":"publish","type":"post","link":"https:\/\/www.wldsteel.com\/ko\/%ec%84%9d%ec%9c%a0-%eb%b0%8f-%ea%b0%80%ec%8a%a4-%ec%9c%a0%ec%a0%95%ec%97%90%ec%84%9c-%ec%82%ac%ec%9a%a9%eb%90%98%eb%8a%94-%ec%9c%a0%ec%a0%95%ec%9a%a9-%ed%8c%8c%ec%9d%b4%ed%94%84\/","title":{"rendered":"\uc11d\uc720 \ubc0f \uac00\uc2a4 \uc720\uc815\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 \uc624\uc77c \ucf00\uc774\uc2f1 \ud30c\uc774\ud504"},"content":{"rendered":"

\uc624\uc77c \ucf00\uc774\uc2f1\uc740 \uc11d\uc720 \ubc0f \uac00\uc2a4 \uc720\uc815\uc758 \uc720\uc815 \ubcbd\uc744 \uc9c0\uc9c0\ud558\uc5ec \uc2dc\ucd94 \uacf5\uc815\uc774 \uc218\ud589\ub418\uace0 \uc644\ub8cc \ud6c4 \uc804\uccb4 \uc720\uc815\uc774 \uc81c\ub300\ub85c \uc791\ub3d9\ud558\ub3c4\ub85d \ud558\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 \uac15\uad00\uc785\ub2c8\ub2e4. \uc2dc\ucd94 \uae4a\uc774\uc640 \uc9c0\uc9c8 \uc870\uac74\uc5d0 \ub530\ub77c \uac01 \uc720\uc815\uc5d0\ub294 \uc5ec\ub7ec \uce35\uc758 \ucf00\uc774\uc2f1\uc774 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ucf00\uc774\uc2f1\uc740 \uc720\uc815\uc744 \uc2dc\ucd94\ud55c \ud6c4 \uc2dc\uba58\ud2b8\ub85c \uc811\ud569\ub418\uba70, \ud29c\ube0c \ubc0f \ub4dc\ub9b4 \ud30c\uc774\ud504\uc640 \ub2ec\ub9ac \uc7ac\uc0ac\uc6a9\uc774 \ubd88\uac00\ub2a5\ud558\uace0 \uc77c\ud68c\uc131 \uc18c\ubaa8\uc131 \uc790\uc7ac\uc785\ub2c8\ub2e4. \ub530\ub77c\uc11c \ucf00\uc774\uc2f1\uc758 \uc18c\ube44\ub7c9\uc740 \uc804\uccb4 \uc720\uc815 \ud29c\ube0c\uc758 70% \uc774\uc0c1\uc744 \ucc28\uc9c0\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc11d\uc720 \ud2b9\uc218 \ud30c\uc774\ud504\ub294 \uc8fc\ub85c \uc11d\uc720 \ubc0f \uac00\uc2a4 \uc720\uc815\uc744 \uc2dc\ucd94\ud558\uace0 \uc11d\uc720 \ubc0f \uac00\uc2a4\ub97c \uc804\uc1a1\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc5ec\uae30\uc5d0\ub294 \uc11d\uc720 \uc2dc\ucd94 \ud30c\uc774\ud504, \uc624\uc77c \ucf00\uc774\uc2f1 \ubc0f \uc624\uc77c \ud38c\ud551 \ud30c\uc774\ud504\uac00 \ud3ec\ud568\ub429\ub2c8\ub2e4. \uc624\uc77c \ub4dc\ub9b4 \ud30c\uc774\ud504\ub294 \uc8fc\ub85c \ub4dc\ub9b4 \uce7c\ub77c\uc640 \ub4dc\ub9b4 \ube44\ud2b8\ub97c \uc5f0\uacb0\ud558\uace0 \ub4dc\ub9b4\ub9c1 \ub3d9\ub825\uc744 \uc804\ub2ec\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc624\uc77c \ucf00\uc774\uc2f1\uc740 \uc8fc\ub85c \uc2dc\ucd94 \uacfc\uc815\uacfc \uc644\ub8cc \ud6c4 \uc2dc\ucd94 \uacfc\uc815\uacfc \uc644\ub8cc \ud6c4 \uc804\uccb4 \uc6b0\ubb3c\uc758 \uc815\uc0c1\uc801\uc778 \uc791\ub3d9\uc744 \ubcf4\uc7a5\ud558\uae30 \uc704\ud574 \uc2dc\ucd94 \uacfc\uc815\uacfc \uc644\ub8cc \ud6c4 \uc6b0\ubb3c \ubcbd\uc744\uc9c0\uc9c0\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ud38c\ud551 \ud29c\ube0c\ub294 \uc8fc\ub85c \uc6b0\ubb3c \ubc14\ub2e5\uc5d0\uc11c \ud45c\uba74\uc73c\ub85c \uc11d\uc720\uc640 \uac00\uc2a4\ub97c \uc6b4\ubc18\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.
\uc624\uc77c \ucf00\uc774\uc2f1\uc740 \uc720\uc815\uc744 \uacc4\uc18d \uac00\ub3d9\ud558\ub294 \uc0dd\uba85\uc120\uc785\ub2c8\ub2e4. \ub2e4\uc591\ud55c \uc9c0\uc9c8 \uc870\uac74\uc73c\ub85c \uc778\ud574 \ub2e4\uc6b4\ud640 \uc751\ub825 \uc0c1\ud0dc\ub294 \uc778\uc7a5, \uc555\ucd95, \uad7d\ud798 \ubc0f \ube44\ud2c0\ub9bc \uc751\ub825\uc774 \ud29c\ube0c \ubcf8\uccb4\uc5d0 \ud1b5\ud569\uc801\uc73c\ub85c \uc791\uc6a9\ud558\ub294 \ub4f1 \ubcf5\uc7a1\ud558\uba70, \uc774\ub85c \uc778\ud574 \ucf00\uc774\uc2f1 \uc790\uccb4\uc758 \ud488\uc9c8\uc5d0 \ub300\ud55c \uc694\uad6c\uac00 \ub192\uc2b5\ub2c8\ub2e4. \uc5b4\ub5a4 \uc774\uc720\ub85c\ub4e0 \ucf00\uc774\uc2f1 \uc790\uccb4\uac00 \uc190\uc0c1\ub418\uba74 \uc720\uc815 \uc804\uccb4\uc758 \uc0dd\uc0b0\ub7c9\uc744 \uc904\uc774\uac70\ub098 \uc2ec\uc9c0\uc5b4 \ud3d0\uae30\ud574\uc57c \ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.
\uac15\ucca0 \uc790\uccb4\uc758 \uac15\ub3c4\uc5d0 \ub530\ub77c \ucf00\uc774\uc2f1\uc740 J55, K55, N80, L80, C90, T95, P110, Q125, V150 \ub4f1 \ub2e4\uc591\ud55c \uac15\ucca0 \ub4f1\uae09\uc73c\ub85c \ub098\ub20c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc720\uc815 \uc870\uac74\uacfc \uae4a\uc774\uc5d0 \ub530\ub77c \ub2e4\ub978 \uac15\uc885\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. \ubd80\uc2dd\uc131 \ud658\uacbd\uc5d0\uc11c\ub294 \ucf00\uc774\uc2f1 \uc790\uccb4\uc5d0 \ub0b4\uc2dd\uc131\uc774 \uc788\uc5b4\uc57c \ud569\ub2c8\ub2e4. \uc9c0\uc9c8\ud559\uc801 \uc870\uac74\uc774 \ubcf5\uc7a1\ud55c \uacf3\uc5d0\uc11c\ub294 \ucf00\uc774\uc2f1\uc774 \ud30c\uc1c4 \ubc29\uc9c0 \ud2b9\uc131\uc744 \uac00\uc838\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

27MnCrV\ub294 TP110T \uac15\uc885 \ucf00\uc774\uc2a4 \uc0dd\uc0b0\uc744 \uc704\ud55c \uc0c8\ub85c\uc6b4 \uac15\uc885\uc785\ub2c8\ub2e4. 29CrMo44 \ubc0f 26CrMo4\ub294 TP110T \uac15\uc885 \ucf00\uc774\uc2f1 \uc0dd\uc0b0\uc5d0 \uc0ac\uc6a9\ub418\ub294 \uae30\uc874 \uac15\uc885\uc785\ub2c8\ub2e4. 27MnCrV\ub294 \ud6c4\uc790\uc758 \ub450 \uac15\uc885\ubcf4\ub2e4 \ubaa8 \uc6d0\uc18c \ud568\uc720\ub7c9\uc774 \uc801\uc5b4 \uc0dd\uc0b0 \ube44\uc6a9\uc744 \ud06c\uac8c \uc808\uac10\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uc77c\ubc18\uc801\uc778 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \ub2f4\uae08\uc9c8 \uacf5\uc815\uc744 \ud1b5\ud574 \uace0\uc628 \ucde8\uc131\uc774 \ub9e4\uc6b0 \ub192\uc740 27MnCrV\ub97c \uc0dd\uc0b0\ud558\uae30 \ub54c\ubb38\uc5d0 \ucda9\uaca9 \uc778\uc131\uc774 \ub0ae\uace0 \ubd88\uc548\uc815\ud569\ub2c8\ub2e4.
\uc774\ub7ec\ud55c \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud574 \uc77c\ubc18\uc801\uc73c\ub85c \ub450 \uac00\uc9c0 \ubc29\ubc95\uc73c\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ud558\ub098\ub294 \uace0\uc628 \ucde8\uc131\uc744 \ud53c\ud558\uae30 \uc704\ud574 \uae09\uc18d \ub0c9\uac01 \ubc29\ubc95 \ud6c4 \ud15c\ud37c\ub9c1\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc778\uc131\uc744 \uc5bb\ub294 \uac83\uc785\ub2c8\ub2e4. \ub450 \ubc88\uc9f8\ub294 \uac15\ucca0\uc758 \ubd88\uc644\uc804\ud55c \uc624\uc2a4\ud14c \ub098\uc774\ud2b8 \ud654\ub97c \ud1b5\ud55c \uc800\uc628 \ub2f4\uae08\uc9c8 \ubc29\ubc95\uc73c\ub85c \uc720\ud574 \uc694\uc18c\uc640 \ubd88\uc21c\ubb3c\uc744 \ud6a8\uacfc\uc801\uc73c\ub85c \uac1c\uc120\ud558\uace0 \uc778\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0b5\ub2c8\ub2e4. \uccab \ubc88\uc9f8 \ubc29\ubc95\uc740 \uc5f4\ucc98\ub9ac \uc7a5\ube44\uc5d0 \ub300\ud55c \uc0c1\ub300\uc801\uc73c\ub85c \uc5c4\uaca9\ud55c \uc694\uad6c \uc0ac\ud56d\uc73c\ub85c \ucd94\uac00 \ube44\uc6a9\uc774 \ucd94\uac00\ub429\ub2c8\ub2e4.
AC1=736\u00b0C \ubc0f AC3=810\u00b0C, 27MnCrV \uac15\ucca0\uc758 \uacbd\uc6b0, \uc800\uc628 \ub2f4\uae08\uc9c8 \uc911 \uac00\uc5f4 \uc628\ub3c4\ub294 740-810\u00b0C \uc0ac\uc774\uc5d0\uc11c \uc120\ud0dd\ub429\ub2c8\ub2e4. \u03b1 + \u03b3 2\uc0c1 \uc601\uc5ed \uac00\uc5f4\uc5d0\uc11c \uc120\ud0dd\ub41c \uac00\uc5f4 \uc628\ub3c4 780\u2103, \ub2f4\uae08\uc9c8 \uac00\uc5f4 \uc720\uc9c0 \uc2dc\uac04 15\ubd84, \ub2f4\uae08\uc9c8 \ubc0f \ud15c\ud37c\ub9c1 \uc120\ud0dd \uc628\ub3c4 630\u2103, \ud15c\ud37c\ub9c1 \uac00\uc5f4 \uc720\uc9c0 \uc2dc\uac04 50\ubd84. \u03b1 + \u03b3 2\uc0c1 \uc601\uc5ed \uac00\uc5f4\uc5d0\uc11c\uc758 \ub2f4\uae08\uc9c8\ub85c \uc778\ud574 \uc6a9\ud574\ub418\uc9c0 \uc54a\uc740 \ud398\ub77c\uc774\ud2b8 \uc0c1\ud0dc\uc758 \uc77c\ubd80\ub97c \uc720\uc9c0\ud558\uba74\uc11c \ub2f4\uae08\uc9c8\ud558\uc5ec \uac15\ub3c4\ub97c \ub192\uc774\uba74\uc11c \uc778\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0b5\ub2c8\ub2e4.
\ub3d9\uc2dc\uc5d0 \uc800\uc628 \ub2f4\uae08\uc9c8\uc740 \uae30\uc874 \uc628\ub3c4\ubcf4\ub2e4 \ub0ae\uc544 \ub2f4\uae08\uc9c8 \uc751\ub825\uc744 \uac10\uc18c\uc2dc\ucf1c \ub2f4\uae08\uc9c8 \ubcc0\ud615\uc744 \uc904\uc5ec \uc5f4\ucc98\ub9ac \uc0dd\uc0b0\uc758 \uc6d0\ud65c\ud55c \uc791\ub3d9\uc744 \ubcf4\uc7a5\ud558\uace0 \ud6c4\uc18d \uc640\uc774\uc5b4 \uc120\uc0ad \uacf5\uc815\uc5d0 \uc88b\uc740 \uc6d0\ub8cc\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4.
\uc774 \uacf5\uc815\uc740 \uac00\uacf5 \uacf5\uc7a5\uc5d0 \uc801\uc6a9\ub418\uc5c8\uc73c\uba70, \ud488\uc9c8 \ubcf4\uc99d \ub370\uc774\ud130\uc5d0 \ub530\ub974\uba74 820-860MPa\uc758 \ud56d\ubcf5 \uac15\ub3c4 Rt0.6, 910-940MPa\uc758 \uc778\uc7a5 \uac15\ub3c4 Rm, \uc5f4\ucc98\ub9ac \ud6c4 \uac15\uad00 \uc0ac\uc774\uc758 \ucda9\uaca9 \uc778\uc131 Akv\ub294 65-85J, \ud30c\uad34 \uc800\ud56d\uc758 100%\uac00 \uc790\uaca9\uc744 \uac16\ucd94\uc5c8\uc2b5\ub2c8\ub2e4. \ub370\uc774\ud130\uc5d0 \ub530\ub974\uba74 27MnCrV \uac15\uad00\uc740 \uc0c1\ub2f9\ud788 \uace0\ud488\uc9c8\uc758 \uace0\uae09 \uac15\uc7ac \ub4f1\uae09 \uc11d\uc720 \ucf00\uc774\uc2f1\uc774\uc5c8\uc73c\uba70, \ub2e4\ub978 \ud55c\ud3b8\uc73c\ub85c\ub294 \uc800\uc628 \ub2f4\uae08\uc9c8 \uacf5\uc815\uc774 \ucca0\uac15 \uc81c\ud488 \uc0dd\uc0b0\uc5d0\uc11c \uace0\uc628 \ucde8\uc131\uc744 \ud53c\ud558\ub294 \ubc29\ubc95\uc774\ub77c\ub294 \uac83\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/p>\n\n\n\n

  1. \uc11d\uc720 \ucf00\uc774\uc2f1\uc740 \uc11d\uc720 \ubc0f \uac00\uc2a4 \uc720\uc815\uc758 \ubcbd\uc774\ub098 \uc720\uc815 \uad6c\uba4d\uc744 \uc81c\uc790\ub9ac\uc5d0 \uace0\uc815\ud558\ub294 \uc5ed\ud560\uc744 \ud558\ub294 \ub300\uad6c\uacbd \ud29c\ube59\uc785\ub2c8\ub2e4. \ucf00\uc774\uc2f1\uc744 \uc2dc\ucd94\uacf5\uc5d0 \uc0bd\uc785\ud558\uace0 \uc2dc\uba58\ud2b8\ub85c \uace0\uc815\ud558\uc5ec \uc2dc\ucd94\uacf5\uacfc \uc554\ubc18\uc744 \ubd84\ub9ac\ud558\uace0 \uc2dc\ucd94\uacf5\uc758 \ubd95\uad34\ub97c \ubc29\uc9c0\ud560 \ubfd0\ub9cc \uc544\ub2c8\ub77c \uc2dc\ucd94 \ubc0f \ucd94\ucd9c\uc744 \uc704\ud55c \uc2dc\ucd94 \uc9c4\ud759\uc758 \uc21c\ud658\uc744 \ubcf4\uc7a5\ud569\ub2c8\ub2e4.<\/li>
  2. \uc624\uc77c \ucf00\uc774\uc2f1\uc758 \uac15\ucca0 \ub4f1\uae09: H40, J55, K55, N80, L80, C90, T95, P110, Q125, V150 \ub4f1. \ucf00\uc774\uc2f1 \ub05d \ucc98\ub9ac \ud615\ud0dc: \uc9e7\uc740 \uc6d0\ud615 \ub098\uc0ac, \uae34 \uc6d0\ud615 \ub098\uc0ac, \ubd80\ubd84 \uc0ac\ub2e4\ub9ac\uaf34 \ub098\uc0ac, \ud2b9\uc218 \ubc84\ud074 \ub4f1. \uc8fc\ub85c \uc720\uc815 \uc2dc\ucd94\uc5d0 \uc0ac\uc6a9\ub418\uc5b4 \uc2dc\ucd94 \uacfc\uc815\uc5d0\uc11c \uc720\uc815 \ubcbd\uc744 \uc9c0\uc9c0\ud558\uace0 \uc720\uc815 \uc644\ub8cc \ud6c4 \uc804\uccb4 \uc720\uc815\uc758 \uc815\uc0c1\uc801\uc778 \uc791\ub3d9\uc744 \ubcf4\uc7a5\ud558\uae30 \uc704\ud574 \uc720\uc815 \uc644\ub8cc \ud6c4 \uc720\uc815 \uc2dc\ucd94\uc5d0 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>
  3. \uc1a1\uc720\uad00\uc758 \uc911\uc694\ud55c \uc704\uce58<\/li>
  4. \uc11d\uc720 \uc0b0\uc5c5\uc740 \ub300\ub7c9\uc758 \uc11d\uc720 \ud29c\ube0c\ub97c \uc0ac\uc6a9\ud558\ub294 \uc0b0\uc5c5\uc73c\ub85c, \uc11d\uc720 \ud29c\ube0c\ub294 \uc11d\uc720 \uc0b0\uc5c5\uc5d0\uc11c \ub9e4\uc6b0 \uc911\uc694\ud55c \uc704\uce58\ub97c \ucc28\uc9c0\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/li>
  5. 1, \uc624\uc77c \ud29c\ube0c \uc0ac\uc6a9, \ub9ce\uc740 \ub3c8\uc744 \uc9c0\ucd9c, \ub3c8\uc744 \uc808\uc57d, \ube44\uc6a9 \uc808\uac10 \uc7a0\uc7ac\ub825\uc774 \ud06c\ub2e4. \uc720\uc815 \ud30c\uc774\ud504\uc758 \uc18c\ube44\ub7c9\uc740 \uc5f0\uac04 \uc2dc\ucd94 \uc601\uc0c1\uc73c\ub85c \uc608\uce21\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc911\uad6d\uc758 \ud2b9\uc815 \uc0c1\ud669\uc5d0 \ub530\ub974\uba74 \uc2dc\ucd94 1m\ub2f9 \uc57d 62kg\uc758 \uc624\uc77c \ud29c\ube0c\uac00 \ud544\uc694\ud558\uba70, \uc5ec\uae30\uc5d0\ub294 48kg\uc758 \ucf00\uc774\uc2f1, 10kg\uc758 \ud29c\ube0c\uac00 \ud3ec\ud568\ub429\ub2c8\ub2e4. 3kg\uc758 \ub4dc\ub9b4 \ud30c\uc774\ud504\uc640 0.5kg\uc758 \ub4dc\ub9b4 \uce7c\ub77c.<\/li>
  6. \uc624\uc77c \ud29c\ube0c\uc758 \uae30\uacc4\uc801 \ubc0f \ud658\uacbd\uc801 \uac70\ub3d9\uc740 \uc11d\uc720 \uc0b0\uc5c5\uc758 \ucca8\ub2e8 \uae30\uc220 \ucc44\ud0dd\uacfc \uc0dd\uc0b0 \ubc0f \ud6a8\uc728\uc131 \ud5a5\uc0c1\uc5d0 \uc911\uc694\ud55c \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4.<\/li>
  7. \uc1a1\uc720\uad00\uc758 \uace0\uc7a5 \uc190\uc2e4\uc740 \ub9c9\ub300\ud558\uba70 \uc1a1\uc720\uad00\uc758 \uc548\uc804, \uc2e0\ub8b0\uc131 \ubc0f \uc11c\ube44\uc2a4 \uc218\uba85\uc740 \uc11d\uc720 \uc0b0\uc5c5\uc5d0\uc11c \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4.<\/li><\/ol>","protected":false},"excerpt":{"rendered":"

    \uc624\uc77c \ucf00\uc774\uc2f1\uc740 \uc11d\uc720 \ubc0f \uac00\uc2a4 \uc720\uc815\uc758 \uc720\uc815 \ubcbd\uc744 \uc9c0\uc9c0\ud558\uc5ec \uc2dc\ucd94 \uacfc\uc815\uc744 \uc218\ud589\ud558\uace0 \uc644\ub8cc \ud6c4 \uc804\uccb4 \uc720\uc815\uc774 \uc81c\ub300\ub85c \uc791\ub3d9\ud558\ub3c4\ub85d \ud558\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 \uac15\uad00\uc785\ub2c8\ub2e4. \uc2dc\ucd94 \uae4a\uc774\uc640 \uc9c0\uc9c8 \uc870\uac74\uc5d0 \ub530\ub77c \uac01 \uc720\uc815\uc5d0\ub294 \uc5ec\ub7ec \uce35\uc758 \ucf00\uc774\uc2f1\uc774 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ucf00\uc774\uc2f1\uc740 [...]\uc785\ub2c8\ub2e4.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"yoast_head":"\nOil casing pipe uses in oil and gas wells<\/title>\n<meta name=\"description\" content=\"Oil casing is a steel pipe used to support the well wall of oil and gas wells to 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