Conductor Pipe Specifications & Installation In Oil & Gas

The conductor pipe runs from the seafloor/surface to relatively shallow depths, providing a conduit to allow circulation of drilling fluid and case off unconsolidated formations. It is the first string we use to support well control equipment, typically a drilling diverter. A standard size for the conductor casing pipe is 24″, 26″, or 30″. In addition, we usually set it from 40 m to 500 m below the seafloor/surface. Here, we will discuss conductor casing pipe specifications, connectors, installation, hammering, and running operations in oil and gas wells. We shall also provide conductor pipe specifications sheets.

Conductor casing Pipe supports the wellhead, the weight of all subsequent casing strings and tubing in many wells, but there are many other wells where the conductor plays no role as a structural member. It maintains borehole integrity through the usually soft formations. It seldom gives us any pressure control because the shallow formations at the setting depth often have little strength. Hence, its role in maintaining borehole integrity is relatively short-lived and severely limited.

As conductor casing pipe is considered one of the Types Of Casing, its specifications are the same as casing specifications.

Conductor Casing Pipe Specification In Oil and Gas

Below, we have gathered some of the conductor casing pipe specs tables from oil and gas NOV & Varcogray.

XL Systems–National Oilwell Varco—XLC-S

Type: Integral, flush Seal: Metal-to-metal

OD	Weight	ID (drift), in.	wall thickness	Connection OD, in.	Casing wall critical cross-sectional	Connection critical cross-sectional	Tensile efficiency, %	Compression efficiency, %	L-80 Joint strength, kips	L-80 Yield torque ft-lb	P-110 Joint strength kips	P-110 Yield torque ft-lb	Q-125 Joint strength kips	Q-125 Yield torque ft-lb
26	202.3	24.5	0.75	26	59.494	39.427	66	66	3,154	233,000	4,337	320,000	4,928	364,000
26	267	24	1	26	78.54	55.097	70	70	4,408	319,000	6,061	439,000	6,887	498,000
26	330.4	23.5	1.25	26	97.193	75.519	78	78	6,042	429,000	8,307	590,000	9,440	670,000
26	392.5	23	1.5	26	115.454	91.118	79	79	7,289	508,000	10,023	698,000	11,390	793,000
30	234.3	28.5	0.75	30	68.919	45.61	66	66	3,649	313,000	5,017	430,000	5,701	489,000
30	309.7	28	1	30	91.106	63.805	70	70	5,104	431,000	7,019	592,000	7,976	673,000
30	383.8	27.5	1.25	30	112.901	87.583	78	78	7,007	581,000	9,634	799,000	10,948	908,000
30	456.6	27	1.5	30	134.303	105.796	79	79	8,464	691,000	11,638	950,000	13,225	1,079,000
30	528	26.5	1.75	30	155.312	124.079	80	80	9,926	797,000	13,649	1,095,000	15,510	1,245,000
30	598.1	26	2	30	175.929	141.912	81	81	11,353	896,000	15,610	1,232,000	17,739	1,400,000
32	250.3	30.5	0.75	32	73.631	48.701	66	66	3,896	358,000	5,357	492,000	6,088	559,000
32	331.1	30	1	32	97.389	68.159	70	70	5,453	493,000	7,497	677,000	8,520	770,000
32	410.5	29.5	1.25	32	120.755	93.615	78	78	7,489	666,000	10,298	916,000	11,702	1,041,000
32	488.6	29	1.5	32	143.728	113.135	79	79	9,051	793,000	12,445	1,090,000	14,142	1,238,000
32	565.4	28.5	1.75	32	166.308	132.75	80	80	10,620	916,000	14,603	1,259,000	16,594	1,431,000
32	640.8	28	2	32	188.496	151.902	81	81	12,152	1,032,000	16,709	1,419,000	18,988	1,612,000
34	266.3	32.5	0.75	34	78.343	51.792	66	66	4,143	405,000	5,697	557,000	6,474	633,000
34	352.4	32	1	34	103.673	72.514	70	70	5,801	559,000	7,977	768,000	9,064	873,000
34	437.2	31.5	1.25	34	128.609	99.646	77	77	7,972	757,000	10,961	1,041,000	12,456	1,183,000
34	520.7	31	1.5	34	153.153	120.473	79	79	9,638	902,000	13,252	1,240,000	15,059	1,409,000
34	602.8	30.5	1.75	34	177.304	141.421	80	80	11,314	1,043,000	15,556	1,434,000	17,678	1,630,000
34	683.5	30	2	34	201.062	161.893	81	81	12,951	1,177,000	17,808	1,618,000	20,237	1,839,000
36	282.4	34.5	0.75	36	83.056	54.884	66	66	4,391	456,000	6,037	627,000	6,861	712,000
36	373.8	34	1	36	109.956	76.868	70	70	6,149	629,000	8,455	865,000	9,609	983,000
36	463.9	33.5	1.25	36	136.463	105.678	77	77	8,454	853,000	11,625	1,173,000	13,210	1,333,000
36	552.7	33	1.5	36	162.577	127.812	79	79	10,225	1,018,000	14,059	1,400,000	15,977	1,590,000
36	640.1	32.5	1.75	36	188.299	150.092	80	80	12,007	1,179,000	16,510	1,621,000	18,762	1,842,000
36	726.2	32	2	36	213.628	171.883	80	80	13,751	1,332,000	18,907	1,831,000	21,485	2,081,000
38	298.4	36.5	0.75	38	87.768	57.975	66	66	4,638	509,000	6,377	700,000	7,247	796,000
38	395.2	36	1	38	116.239	81.222	70	70	6,498	704,000	8,934	968,000	10,153	1,100,000
38	490.6	35.5	1.25	38	144.317	111.71	77	77	8,937	956,000	12,288	1,314,000	13,964	1,493,000
38	584.7	35	1.5	38	172.002	135.151	79	79	10,812	1,141,000	14,867	1,569,000	16,894	1,783,000
38	677.5	34.5	1.75	38	199.295	158.763	80	80	12,701	1,323,000	17,464	1,819,000	19,845	2,067,000
38	769	34	2	38	226.195	181.873	80	80	14,550	1,496,000	20,006	2,057,000	22,734	2,337,000
40	314.4	38.5	0.75	40	92.481	61.066	66	66	4,885	566,000	6,717	778,000	7,633	884,000
40	416.5	38	1	40	122.522	85.576	70	70	6,846	783,000	9,413	1,076,000	10,697	1,223,000
40	517.3	37.5	1.25	40	152.171	117.742	77	77	9,419	1,064,000	12,952	1,463,000	14,718	1,662,000
40	616.8	37	1.5	40	181.427	142.49	79	79	11,399	1,271,000	15,674	1,748,000	17,811	1,987,000
40	714.9	36.5	1.75	40	210.29	167.433	80	80	13,395	1,475,000	18,418	2,029,000	20,929	2,305,000
40	811.7	36	2	40	238.761	191.863	80	80	15,349	1,670,000	21,105	2,296,000	23,983	2,609,000
40	907.1	35.5	2.25	40	266.839	221.51	83	83	17,721	1,904,000	24,366	2,618,000	27,689	2,975,000
42	330.4	40.5	0.75	42	97.193	64.158	66	66	5,133	625,000	7,057	860,000	8,020	977,000
42	437.9	40	1	42	128.805	89.931	70	70	7,194	866,000	9,892	1,191,000	11,241	1,353,000
42	544	39.5	1.25	42	160.025	123.774	77	77	9,902	1,178,000	13,615	1,619,000	15,472	1,840,000
42	648.8	39	1.5	42	190.852	149.828	79	79	11,986	1,409,000	16,481	1,937,000	18,729	2,201,000
42	752.3	38.5	1.75	42	221.286	176.104	80	80	14,088	1,636,000	19,371	2,250,000	22,013	2,557,000
42	854.4	38	2	42	251.327	201.854	80	80	16,148	1,853,000	22,204	2,548,000	25,232	2,896,000
42	955.2	37.5	2.25	42	280.976	223.36	79	79	17,869	2,027,000	24,570	2,787,000	27,920	3,167,000
44	346.4	42.5	0.75	44	101.905	67.249	66	66	5,380	688,000	7,397	945,000	8,406	1,074,000
44	459.2	42	1	44	135.088	94.285	70	70	7,543	953,000	10,371	1,310,000	11,786	1,489,000
44	570.7	41.5	1.25	44	167.879	129.806	77	77	10,384	1,297,000	14,279	1,784,000	16,226	2,027,000
44	680.9	41	1.5	44	200.277	157.167	78	78	12,573	1,553,000	17,288	2,135,000	19,646	2,427,000
44	789.7	40.5	1.75	44	232.282	184.775	80	80	14,782	1,805,000	20,325	2,482,000	23,097	2,821,000
44	897.1	40	2	44	263.894	211.844	80	80	16,948	2,046,000	23,303	2,814,000	26,481	3,198,000
44	1003.3	39.5	2.25	44	295.113	245.21	83	83	19,617	2,342,000	26,973	3,221,000	30,651	3,660,000
46	362.5	44.5	0.75	46	106.618	70.34	66	66	5,627	753,000	7,737	1,035,000	8,793	1,176,000
46	480.6	44	1	46	141.372	98.639	70	70	7,891	1,044,000	10,850	1,436,000	12,330	1,632,000
46	597.4	43.5	1.25	46	175.733	135.838	77	77	10,867	1,423,000	14,942	1,956,000	16,980	2,223,000
46	712.9	43	1.5	46	209.701	164.506	78	78	13,160	1,705,000	18,096	2,344,000	20,563	2,663,000
46	827	42.5	1.75	46	243.277	193.446	80	80	15,476	1,983,000	21,279	2,726,000	24,181	3,098,000
46	939.8	42	2	46	276.46	221.834	80	80	17,747	2,249,000	24,402	3,093,000	27,729	3,514,000
46	1051.3	41.5	2.25	46	309.251	257.13	83	83	20,570	2,579,000	28,284	3,546,000	32,141	4,030,000
46	1161.5	41	2.5	46	341.648	291.593	85	85	23,327	2,893,000	32,075	3,978,000	36,449	4,521,000
48	378.5	46.5	0.75	48	111.33	73.432	66	66	5,875	821,000	8,078	1,129,000	9,179	1,283,000
48	502	46	1	48	147.655	102.994	70	70	8,240	1,140,000	11,329	1,568,000	12,874	1,781,000
48	624.1	45.5	1.25	48	183.587	141.87	77	77	11,350	1,554,000	15,606	2,137,000	17,734	2,428,000
48	744.9	45	1.5	48	219.126	171.845	78	78	13,748	1,863,000	18,903	2,562,000	21,481	2,911,000
48	864.4	44.5	1.75	48	254.273	202.117	79	79	16,169	2,169,000	22,233	2,982,000	25,265	3,388,000
48	982.6	44	2	48	289.027	231.825	80	80	18,546	2,462,000	25,501	3,385,000	28,978	3,846,000
48	1099.4	43.5	2.25	48	323.388	268.779	83	83	21,502	2,825,000	29,566	3,884,000	33,597	4,413,000

XL Systems–National Oilwell Varco—XLF

Type: Integral, flush Seal: Metal-to-metal

OD	Weight	ID (drift), in.	wall thickness	Connection OD, in.	Casing wall critical cross-sectional	Connection critical cross-sectional	Tensile efficiency, %	Compression efficiency, %	L-80 Joint strength, kips	L-80 Yield torque ft-lb	P-110 Joint strength kips	P-110 Yield torque ft-lb	Q-125 Joint strength kips	Q-125 Yield torque ft-lb+O78:O101O78:O1O78:O105
20	104.1	19	0.5	20	30.631	15.879	52	52	1,270	73,000	1,747	100,000	1,985	113,000
20	129.3	18.75	0.625	20	38.043	20.082	53	53	1,607	91,000	2,209	125,000	2,510	142,000
20	131.3	18.73	0.635	20	38.631	20.082	52	52	1,607	91,000	2,209	125,000	2,510	142,000
20	154.2	18.5	0.75	20	45.357	25.076	55	55	2,006	112,000	2,758	154,000	3,135	175,000
20	166.4	18.376	0.812	20	48.948	25.076	51	51	2,006	111,000	2,758	153,000	3,135	174,000
20	202.9	18	1	20	59.69	38.455	64	64	3,076	167,000	4,230	230,000	4,807	261,000
20	250.3	17.5	1.25	20	73.631	50.994	69	69	4,080	216,000	5,609	298,000	6,374	338,000
22	114.8	21	0.5	22	33.772	17.488	52	52	1,399	88,000	1,924	122,000	2,186	138,000
22	142.7	20.75	0.625	22	41.97	22.124	53	53	1,770	111,000	2,434	152,000	2,766	173,000
22	170.2	20.5	0.75	22	50.069	27.636	55	55	2,211	137,000	3,040	188,000	3,455	213,000
22	224.3	20	1	22	65.973	42.426	64	64	3,394	205,000	4,667	282,000	5,303	320,000
22	277	19.5	1.25	22	81.485	56.319	69	69	4,506	266,000	6,195	366,000	7,040	416,000
24	125.5	23	0.5	24	36.914	19.096	52	52	1,528	106,000	2,101	145,000	2,387	165,000
24	156	22.75	0.625	24	45.897	24.165	53	53	1,933	132,000	2,658	182,000	3,021	207,000
24	186.2	22.5	0.75	24	54.782	30.196	55	55	2,416	164,000	3,322	225,000	3,775	256,000
24	245.6	22	1	24	72.257	46.397	64	64	3,712	246,000	5,104	339,000	5,800	385,000
24	303.7	21.5	1.25	24	89.339	61.644	69	69	4,932	321,000	6,781	441,000	7,706	501,000
24	360.5	21	1.5	24	106.029	70.174	66	66	5,614	357,000	7,719	491,000	8,772	559,000
26	136.2	25	0.5	26	40.055	20.705	52	52	1,656	125,000	2,278	171,000	2,588	195,000
26	169.4	24.75	0.625	26	49.824	26.207	53	53	2,097	156,000	2,883	215,000	3,276	244,000
26	202.3	24.5	0.75	26	59.494	32.756	55	55	2,620	193,000	3,603	266,000	4,095	302,000
26	267	24	1	26	78.54	50.368	64	64	4,029	292,000	5,540	401,000	6,296	456,000
26	330.4	23.5	1.25	26	97.193	66.969	69	69	5,358	380,000	7,367	523,000	8,371	594,000
26	392.5	23	1.5	26	115.454	76.268	66	66	6,101	425,000	8,389	584,000	9,534	664,000
28	146.9	27	0.5	28	43.197	22.313	52	52	1,785	145,000	2,454	199,000	2,789	226,000
28	182.7	26.75	0.625	28	53.751	28.248	53	53	2,260	182,000	3,107	250,000	3,531	284,000
28	218.3	26.5	0.75	28	64.206	35.315	55	55	2,825	225,000	3,885	310,000	4,414	352,000
28	288.4	26	1	28	84.823	54.339	64	64	4,347	341,000	5,977	468,000	6,792	532,000
28	357.1	25.5	1.25	28	105.047	72.294	69	69	5,784	445,000	7,952	612,000	9,037	696,000
28	424.5	25	1.5	28	124.878	82.362	66	66	6,589	498,000	9,060	685,000	10,295	778,000
30	196.1	28.75	0.625	30	57.678	30.29	53	53	2,423	210,000	3,332	288,000	3,786	327,000
30	234.3	28.5	0.75	30	68.919	37.875	55	55	3,030	260,000	4,166	357,000	4,734	406,000
30	309.7	28	1	30	91.106	58.31	64	64	4,665	393,000	6,414	541,000	7,289	615,000
30	383.8	27.5	1.25	30	112.901	77.619	69	69	6,210	515,000	8,538	708,000	9,702	805,000
30	456.6	27	1.5	30	134.303	88.456	66	66	7,076	577,000	9,730	794,000	11,057	902,000
30	528	26.5	1.75	30	155.312	110.584	71	71	8,847	710,000	12,164	976,000	13,823	1,109,000
30	598.1	26	2	30	175.929	130.267	74	74	10421	832000	14329	1131000	16283	1285000

XL Systems–National Oilwell Varco—Viper

Type: Weld-on pin and box Seal: Internal elastomeric and external metal-to-metal

OD	Weight	ID (drift), in.	wall thickness	Connection OD, in.	Casing wall critical cross-sectional	Connection critical cross-sectional	Tensile efficiency, %	Compression efficiency, %	L-80 Joint strength, kips	L-80 Yield torque ft-lb	P-110 Joint strength kips	P-110 Yield torque ft-lb	Q-125 Joint strength kips	Q-125 Yield torque ft-lb
16	72.9	14.624	0.438	17.5	21.414	31.038	144.9	99.8	2,483	171,451	–	–	–	–
16	77.7	14.564	0.468	17.5	22.836	31.038	135.9	93.6	2,483	171,451	–	–	–	–
16	82.8	14.5	0.5	17.5	24.347	31.038	127.5	87.8	2,483	171,451	–	–	–	–
16	102.7	14.25	0.625	17.5	30.189	39.675	131.4	98.9	3,174	232,802	–	–	–	–
16	112.6	14.124	0.688	17.5	33.096	45.25	136.7	93.7	3,620	234,007	–	–	–	–
16	122.3	14	0.75	17.5	35.932	45.25	125.9	86.3	3,620	234,007	–	–	–	–
18.625	85.2	17.249	0.438	20.35	25.026	36.15	144.5	95.1	2,892	223,035	–	–	–	–
18.625	90.8	17.189	0.468	20.35	26.696	36.15	135.4	89.2	2,892	223,035	–	–	–	–
18.625	96.9	17.125	0.5	20.35	28.471	36.15	127	83.6	2,892	223,035	–	–	–	–
18.625	120.3	16.875	0.625	20.35	35.343	45.938	130	82.3	3,675	271,069	–	–	–	–
18.625	131.9	16.749	0.688	20.35	38.769	53.625	138.3	91.5	4,290	310,389	–	–	–	–
18.625	143.3	16.625	0.75	20.35	42.117	53.625	127.3	84.2	4,290	310,389	–	–	–	–
20	91.6	18.53	0.438	21.62	26.918	49.825	185.1	120.9	3,986	306,595	–	–	–	–
20	104.2	18.5	0.5	21.62	30.631	49.825	162.7	106.3	3,986	306,595	–	–	–	–
20	129.4	18.25	0.625	21.62	38.043	49.825	131	85.6	3,986	306,595	–	–	–	–
20	154.3	18	0.75	21.62	45.357	63.925	140.9	91.2	5,114	386,308	–	–	–	–
20	166.6	17.876	0.812	21.62	48.948	63.925	130.6	84.5	5,114	386,308	–	–	–	–
20	203.1	17.5	1	21.62	59.69	54.125	90.7	59.3	4,330	452,924	–	–	–	–
20	227	16.9	1.125	21.62	66.71	80.888	121.3	105.4	6,471	575,810	–	–	–	–
20	250.5	16.9	1.25	21.62	73.631	80.888	109.9	95.5	6,471	575,810	–	–	–	–
20	296.6	16.5	1.5	21.62	87.179	80.888	92.8	80.6	6,471	575,810	–	–	–	–
22	101	20.53	0.438	23.8	29.67	55.638	187.5	145.9	4,451	479,151	–	–	–	–
22	114.9	20.5	0.5	23.8	33.772	55.638	164.7	128.2	4,451	479,151	–	–	–	–
22	142.8	20.25	0.625	23.8	41.97	55.638	132.6	103.2	4,451	479,151	–	–	–	–
22	170.4	20	0.75	23.8	50.069	67.225	134.3	106.6	5,378	576,414	–	–	–	–
22	183.9	19.876	0.812	23.8	54.05	67.225	124.4	98.7	5,378	576,414	–	–	–	–
22	224.5	19.5	1	23.8	65.973	76.925	116.6	96.8	6,154	658,016	–	–	–	–
22	251	18.9	1.125	23.8	73.778	86.663	117.5	115.4	6,933	809,562	–	–	–	–
22	277.3	18.9	1.25	23.8	81.485	86.663	106.4	104.5	6,933	809,562	–	–	–	–
22	328.7	18.5	1.5	23.8	96.604	86.663	89.7	88.1	6,933	809,562	–	–	–	–
24	125.6	22.15	0.5	25.8	36.914	68.513	185.6	168.6	5,481	732,375	–	–	–	–
24	156.2	22.15	0.625	25.8	45.897	68.513	149.3	135.6	5,481	732,375	–	–	–	–
24	186.4	22	0.75	25.8	54.782	68.513	125.1	113.6	5,481	732,375	–	–	–	–
24	201.3	21.876	0.812	25.8	59.152	82.913	140.2	116.9	6,633	789,503	–	–	–	–
24	245.9	21.5	1	25.8	72.257	82.913	114.7	95.7	6,633	789,503	–	–	–	–
24	275.1	20.9	1.125	25.8	80.847	93.938	116.2	114.2	7,515	975,484	–	–	–	–
24	304	20.9	1.25	25.8	89.339	93.938	105.1	103.4	7,515	975,484	–	–	–	–
24	360.8	20.5	1.5	25.8	106.029	93.938	88.6	87.1	7,515	975,484	–	–	–	–
26	136.3	24.15	0.5	27.8	40.055	73.738	184.1	168.5	5,899	864,301	–	–	–	–
26	169.5	24.15	0.625	27.8	49.824	73.738	148	135.5	5,899	864,301	–	–	–	–
26	202.4	24	0.75	27.8	59.494	73.738	123.9	113.5	5,899	864,301	–	–	–	–
26	218.6	23.876	0.812	27.8	64.254	90.188	140.4	116.3	7,215	932,958	–	–	–	–
26	267.3	23.5	1	27.8	78.54	90.188	114.8	95.2	7,215	932,958	–	–	–	–
26	299.2	22.9	1.125	27.8	87.916	101.838	115.8	113	8,147	1,156,863	–	–	–	–
26	330.7	22.9	1.25	27.8	97.193	101.838	104.8	102.2	8,147	1,156,863	–	–	–	–
26	392.9	22.5	1.5	27.8	115.454	101.838	88.2	86.1	8,147	1,156,863	–	–	–	–
28	147	26.15	0.5	29.8	43.197	79.975	185.1	164.4	6,398	1,007,147	–	–	–	–
28	182.9	26.15	0.625	29.8	53.751	79.975	148.8	132.1	6,398	1,007,147	–	–	–	–
28	218.5	26	0.75	29.8	64.206	79.975	124.6	110.6	6,398	1,007,147	–	–	–	–
28	236	25.876	0.812	29.8	69.356	96.638	139.3	114.8	7,731	1,088,382	–	–	–	–
28	288.6	25.5	1	29.8	84.823	96.638	113.9	93.9	7,731	1,088,382	–	–	–	–
28	323.2	24.9	1.125	29.8	94.984	109.538	115.3	112.8	8,763	1,353,703	–	–	–	–
28	357.4	24.9	1.25	29.8	105.047	109.538	104.3	102	8,763	1,353,703	–	–	–	–
28	424.9	24.5	1.5	29.8	124.878	109.538	87.7	85.8	8,763	1,353,703	–	–	–	–
30	157.7	27.65	0.5	32	46.338	106.988	230.9	235.8	8,559	1,601,052	–	–	–	–
30	196.3	27.65	0.625	32	57.678	106.988	185.5	189.4	8,559	1,601,052	–	–	–	–
30	234.5	27.65	0.75	32	68.919	106.988	155.2	158.5	8,559	1,601,052	–	–	–	–
30	310	27.5	1	32	91.106	106.988	117.4	119.9	8,559	1,601,052	–	–	–	–
30	347.3	26.78	1.125	32	102.053	133.125	130.4	137.9	10,650	1,889,490	–	–	–	–
30	384.2	26.78	1.25	32	112.901	133.125	117.9	124.6	10,650	1,889,490	–	–	–	–
30	457	26.5	1.5	32	134.303	133.125	99.1	104.8	10,650	1,889,490	–	–	–	–
30	528.5	25.9	1.75	32	155.312	150.663	97	110.8	12,053	2,165,271	–	–	–	–
30	598.6	25.5	2	32	175.929	150.663	85.6	97.8	12,053	2,165,271	–	–	–	–
32	168.4	29.65	0.5	34	49.48	113.913	230.2	231.6	9,113	1,829,649	–	–	–	–
32	209.6	29.65	0.625	34	61.605	113.913	184.9	186	9,113	1,829,649	–	–	–	–
32	250.5	29.65	0.75	34	73.631	113.913	154.7	155.7	9,113	1,829,649	–	–	–	–
32	331.4	29.5	1	34	97.389	113.913	117	117.7	9,113	1,829,649	–	–	–	–
32	371.3	28.78	1.125	34	109.121	142.35	130.5	134.4	11,388	2,163,167	–	–	–	–
32	410.9	28.78	1.25	34	120.755	142.35	117.9	121.5	11,388	2,163,167	–	–	–	–
32	489.1	28.5	1.5	34	143.728	142.35	99	102	11,388	2,163,167	–	–	–	–
32	565.9	27.9	1.75	34	166.308	160.7	96.6	109.5	12,856	2,485,833	–	–	–	–
32	641.4	27.5	2	34	188.496	160.7	85.3	96.7	12,856	2,485,833	–	–	–	–
34	179.1	31.65	0.5	36	52.622	120.713	229.4	230.2	9,657	2,073,497	–	–	–	–
34	223	31.65	0.625	36	65.532	120.713	184.2	184.8	9,657	2,073,497	–	–	–	–
34	266.6	31.65	0.75	36	78.343	120.713	154.1	154.6	9,657	2,073,497	–	–	–	–
34	352.8	31.5	1	36	103.673	120.713	116.4	116.8	9,657	2,073,497	–	–	–	–
34	395.4	30.78	1.125	36	116.19	150.7	129.7	133.3	12,056	2,458,775	–	–	–	–
34	437.6	30.78	1.25	36	128.609	150.7	117.2	120.4	12,056	2,458,775	–	–	–	–
34	521.1	30.5	1.5	36	153.153	150.7	98.4	101.1	12,056	2,458,775	–	–	–	–
34	603.3	29.9	1.75	36	177.304	169.638	95.7	109.1	13,571	2,828,530	–	–	–	–
34	684.2	29.5	2	36	201.062	169.638	84.4	96.2	13,571	2,828,530	–	–	–	–
36	282.6	31.22	0.75	36.88	83.056	173.3	208.7	270.8	13,864	2,830,291	–	–	–	–
36	374.2	31.22	1	36.88	109.956	173.3	157.6	204.6	13,864	2,830,291	–	–	–	–
36	419.4	31.22	1.125	36.88	123.258	173.3	140.6	182.5	13,864	2,830,291	–	–	–	–
36	464.3	31.22	1.25	36.88	136.463	173.3	127	164.8	13,864	2,830,291	–	–	–	–
36	553.2	31.22	1.5	36.88	162.577	173.3	106.6	138.3	13,864	2,830,291	–	–	–	–
36	640.7	31.22	1.75	36.88	188.299	189.5	100.6	92.7	15,160	2,261,941	–	–	–	–
36	726.9	31.22	2	36.88	213.628	189.5	88.7	81.7	15,160	2,261,941	–	–	–	–
36	811.8	30.15	2.25	36.88	238.565	219.3	91.9	96.5	17,544	2,884,661	–	–	–	–
36	895.3	30.15	2.5	36.88	263.108	219.3	83.3	87.5	17,544	2,884,661	–	–	–	–
38	298.7	33.22	0.75	38.88	87.768	182.75	208.2	272.7	14,620	3,189,264	–	–	–	–
38	395.5	33.22	1	38.88	116.239	182.75	157.2	205.9	14,620	3,189,264	–	–	–	–
38	443.5	33.22	1.125	38.88	130.327	182.75	140.2	183.7	14,620	3,189,264	–	–	–	–
38	491.1	33.22	1.25	38.88	144.317	182.75	126.6	165.9	14,620	3,189,264	–	–	–	–
38	585.3	33.22	1.5	38.88	172.002	182.75	106.2	139.2	14,620	3,189,264	–	–	–	–
38	678.1	33.22	1.75	38.88	199.295	201.638	101.2	91.7	16,131	2,548,581	–	–	–	–
38	769.7	33.22	2	38.88	226.195	201.638	89.1	80.8	16,131	2,548,581	–	–	–	–
38	859.9	32.15	2.25	38.88	252.702	231.113	91.5	96.3	18,489	3,257,936	–	–	–	–
38	948.7	32.15	2.5	38.88	278.816	231.113	82.9	87.3	18,489	3,257,936	–	–	–	–

Download Conductor Casing Pipe Tables

• Casing & Conductor Pipe Tables (Premium Connections)
• Vetcogray Connectors and conductor casing pipes specs

Conductor Casing Pipe Connections in Oil And Gas Wells

Typically, when installing conductor casing pipe joints on oil and gas land rigs (also see types of drilling rigs), the pipes are connected by welding beveled ends. This process can be time-consuming, taking an average of three hours per joint.

On a Jack-up rig, to reduce the time of the operations and when it is practicable, drivable threaded quick connectors (i.e., the RL-4) and drivable squinch joint connectors such as the Fast Releasing Joint (i.e., the ALT-2), should be used.

A Squnch Joint

• A Squnch Joint is a threadless automatic mechanical lock/release connection made up without rotation. The powerful weight-set connection is well-suited for connecting large-diameter conductor casing joints and connecting the string of casing to the wellhead housing extension.
• The type ALT-2 heavy-duty squinch joint is used for pipe joins. Generally, up to 36″ OD, but larger common conductor pipe sizes are available.
• It is easily stabbed, drivable, reusable, and can be released mechanically.
• It is suitable for the severest conditions above the mud line and can be used below it when the conductor is driven into place. The 20″ ALT-2 is an ideal high-pressure housing extension connector with an internal pressure rating of up to 5,000 psi.
• The type ST-2 standard duty squinch joint is not a drivable connector. It connects pipe joints up to 30″ OD, runs into a pre-drilled hole, and cements in place. It is recommended for use above the mud line and is reusable and mechanically released.

The Quick Thread Connection

The Quick Thread Connection RL-4 is rigid for conductor and casing connections and requires just one-quarter turn for full make-up.

The helix angle of the patented, interlocking thread form, in combination with other connector geometries, creates a preload force between the pin and box. The 30″ and larger RL-4 conductor casing connectors have a generous shoulder for efficient driving.

the anti-rotation tab

• Four identical threads 90° apart make up simultaneously. The thread interface is tapered at 4″ per ft of diameter. The connector box has four slots cut on the OD, close to the shoulder of the box, and the connector pin has four recessed grooves cut on its OD adjacent to the slots on the box.
• To activate the anti-rotation tab, a 90° incision is made with the impact tool into the anti-rotation slot. A metal strip is bent into the recessed groove in the pin, providing a positive mechanical lock.

It does not need power tongs for make-up and is releasable and reusable. It has a high 9° stab angle with dual stab guides. A negative 5° back rake thread interlock reduces belling tendency.

Conductor Casing Pipe Installation Hammers Types For Oil & Gas Wells

As mentioned before, a conductor casing pipe (CP) is necessary to provide a riser (drilling riser) and flow path for drilling mud from the well to the surface circulating system in Drilling. We should choose the OD and the wall thickness of the conductor pipe according to previous experiences in the area and to the selected casing profile.

Conductor casing Pipe installation can be done by driving with a pile hammer or pre-drilling a hole and cementing.

Conductor Casing Pipes Installation With Pile Hammers

Diesel pile hammers are used for surface installation and driving operations on conductor casing pipes in oil and gas wells. The driving depth of the conductor casing pipe is a function of the sediments in the ground.

The most commonly used system is the ‘Delmag – D44 or D46′ which has a hammer weight of 18t with a variable delivery fuel pump. The table below shows the specifications of other types of Delmag Hammers. The Manufacturer’s Operating Procedures must be followed when planning driving operations.

The table below shows the standard and maximum blows/ft for different Conductor Casing Pipes and different conductor pipe hammer sizes for installation in oil and gas wells.

Conductor Casing Pipe Installation Hydro-Hammer

Frank’s Hydro-hammer is an ‘intelligent hammer’ due to its sophisticated electronic control design. This control system is capable of regulating the energy for each impact.

The net energy applied to the conductor pipe during installation, measured during every blow, is monitored and can be regulated from a maximum of 5% or less. Since the measure of energy is precisely known, the force applied to the pile can be accurately computed.

One particularly unique advantage of the Hydrohammer is the control system’s ability to shut off the ram (also check: BOP Ram) automatically if the pile starts to run ahead of the hammer in soft soils, e.g., due to

• The hammer is not positioned correctly on the pile.
• The stroke rate was becoming too high.
• Blow energy is too high.

Other advantages unique to this hydraulic hammer are:

• It can operate at any angle, even horizontally.
• It has an optional printer available to produce a report of the piling operation.
• It can be used in onshore or offshore rigs, in air, or submerged underwater.

Final Refusal Depth For Conductor Casing Pipe Installation For Oil & Gas Wells

The following procedure details the determination of the final refusal depth of the conductor casing pipe installation.

A. When the driving depth of the conductor pipe is not specified in the drilling program, the final depth of the driving is the ‘refusal depth.’

• The refusal value generally used is 1,000-1,100 blows/meter (300-330blows/ft)
• Local experience could dictate a different refusal value. We can predetermine the driving depth can by conducting a soil boring analysis.
• Examine offset well data for depths and potential problems to determine if the CP depth is adequate.

B. We can establish the installation driving depth of the conductor casing pipe which is specified in the Drilling Program, with the following formula:

Hi = [df x (E+H) – 103 x H]/[1.03 – df + 0.67 x (GOVhi – 1.03)]

Where:

• Hi = Minimum driving depth (m) from seabed
• E = Elevation (m) distance from bell nipple and sea level
• H = Water depth (m)
• df = Maximum mud weight (kg/l) to be used
• GOVhi = integrated density of sediments (kg/dm3/10m)

If the refusal depth does not meet this value, we may need to perform CP internal washing. CP internal washing might be necessary several times before reaching the planned depth.

C. Note: the CP shoe could collapse if there is a high refusal value in challenging formations.