Coring Tool
| Coring tools are used for acquisition of the rock core in petroleum drilling. The coring tools can be applied to soft, moderate and rigid rock formations. Jereh Drilltech can supply core barrels and core bits in various sizes and types. |
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Core Barrel
Core Barrel is a perfect tool in general coring operation. The tool is mainly used to obtain core in oil drilling well or in geological prospecting. Core Barrel Jereh Drilltech supplies are available to soft, medium, hard and mix stratum.
Technical Specifications of Core Barrel
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Core Barrel Type
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JD-CB
3-1/2"x1-3/4"
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JD-CB
4-3/4"×2- 5/8"
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JD-CB 5-1/4"×2-3/4"
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JD-CB
5-3/4"×3-1/2"
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JD-CB 6-3/4"×4"
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JD-CB 7-1/8"×4-1/8"
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JD-CB 8"x5-1/4"
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Length(mm)
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4,600
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9,200/
18,400
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9,200/
18,400
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9,200/
18,400
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9,200/
18,400
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9,200/
18,400
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9,200/
18,400
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Out Barrel, O.D.XI.D.(mm)
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89×70
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121×93
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133×101
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146×118
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172×136
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180×144
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203×169
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Inner Barrel O.D.XI.D. (mm)
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60×52
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85×72
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89×76
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108×94
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121×108
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127×112
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159×140
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Top Threads
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2-3/8IF
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3-1/2IF
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3-1/2IF
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3-1/2IF
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4-1/2IF
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4-1/2IF
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6-5/8 RRG
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Bit Size (in)
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4-1/8
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5-7/8~6-1/2
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5-7/8~6-1/2
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6-1/2~7-7/8
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7-1/2~9-5/8
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8-1/2~9-5/8
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12-1/4
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Core Size (mm)
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45
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66
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70
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89
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101
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105
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133
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Core Bit
Core Bits are widely used with Core Barrels. Jereh Drilltech can supply various core bits in PDC type and TSP type.
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Bit Description
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Stratum Situation
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Very Soft
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Soft
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Medium Soft
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Medium
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Medium Hard
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Hard
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Very Hard
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Core Bit,8.5" to 800 m, PDC Type
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Core Bit,8.5" to 1500 m, TSP Type
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Core Bit,8.5" to 2500 m, TSP Type
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Technical Specifications of Core Bit
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PDC Bit Size (in)
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Primary Cutter Size ( mm)
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Gage Protection Length (in)
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Quantity of Nozzles (pc)
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Core Barrel Size (in)
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IADC Code
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Recommended Parameters
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Drilling Pressure (kN)
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Rotary Rate
(rpm)
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Fluid Flow Rate(l/s)
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4-3/4
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13
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1~2
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6
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4-1/8 ×2-1/8
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M332
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9~30
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40~100
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6~16
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6
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13
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1~2
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6
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4-3/4 ×2-5/8
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9~30
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40~120
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6~16
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8-1/2
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13
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2~3
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12
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6-3/4 ×4
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23~50
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40~150
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11~20
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12-1/4
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13
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2~3
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12
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8 ×5-1/4
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45~80
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40~150
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22~32
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TSP Bit Size (in)
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Primary Cutter Size ( mm)
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Gage Protection Length (in)
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Flow Area
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Core Barrel Size (in)
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IADC Code
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Recommended parameters
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Drilling Pressure (kN)
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Rotary Rate
(rpm)
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Fluid Flow Rate(l/s)
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5-7/8
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7
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1.0~2.0
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0.10~1.00
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4-3/4 ×2-5/8
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M723
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20~60
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40~80
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6~13
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8-1/2
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7
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2.0~3.0
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0.15~1.50
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6-3/4 ×4
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30~80
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40~80
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11~19
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5-7/8
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7
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1.0~2.0
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0.10~1.00
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4-3/4 ×2-5/8
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M722
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20~50
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40~80
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6~13
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6
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7
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1.0~2.0
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0.10~1.00
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4-3/4 ×2-5/8
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20~50
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40~80
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6~13
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8-1/2
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7
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2.0~3.0
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0.15~1.50
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6-3/4 ×4
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40~80
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40~80
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11~19
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