Cross-Over Sub(Rotary Sub)
Cross-Over Sub
Cross-over sub acts for conversion and connection of drill stem component in petroleum, natural gas and geology drilling work.
It is used mainly for connecting of upper drill tools and lower drill tools during drilling operations.
The cross over sub in 4 types of main structure
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Sort
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Description
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Upper Connection Part
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Lower Connection Part
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Type
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1
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Kelly cross-over sub
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Kelly
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Drill pipe
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A or B
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2
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Drill pipe cross-over sub
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Drill pipe
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Drill pipe
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A or B
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3
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Interim cross-over sub
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Drill pipe
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Drill collar
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A or B
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4
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Drill collar cross-over sub
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Drill collar
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Drill collar
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A or B
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5
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Drill bit cross-over sub
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Drill collar
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Drill bit
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A or B
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6
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Swivel cross-over sub
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Swivel lower sub
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Kelly
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C
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7
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Fishing cross-over sub
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Kelly
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Drill pipe
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C
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Drill pipe
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Fishing tools
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C
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Type A stand for same diameter : one crossover sub has one size (D)on O.D., code A.
Type B stands for reduce type: one crossover sub has two sizes (D1,D2) on O.D., code B.
Type C is left hand thread type: the connection thread is left hand type, code C.
Scification of Tubing Cross- Joint
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External Thread
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Internal Thread
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Thread Code Name
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Tapering
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Large End Diameter
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Small End
Diameter
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I.D.
(mm)
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Thread Code
Name
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Tapering
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LargeEnd Diameter
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Small End Diameter
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I.D.
(mm)
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1.900TBG
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1：16
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48.3
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47
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40.3
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1.900TBG
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1：16
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55.9
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66.1
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49.9
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2-3/8TBG
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1：16
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60.3
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59
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40.3
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2-3/8TBG
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1：16
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73.0
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58.1
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61.9
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2-7/8TBG
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1：16
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73
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70
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62
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2-7/8TBG
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1：16
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88.9
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70.8
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74.6
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3-1/2TBG
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1：16
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88.9
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86
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76
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3-1/2TBG
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1：16
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108.0
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86.7
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90.5
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4TBG
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1：16
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101.6
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98
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88
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4TBG
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1：16
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120.6
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98.5
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103.2
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4-1/2TBG
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1：16
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114.3
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111
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100.3
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4-1/2TBG
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1：16
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132.1
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111.2
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115.9
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4-1/2BCSG
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1：16
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114.7
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112
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100
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1.900UPTBG
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1：16
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63.5
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51.0
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54.8
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1.900UPTBG
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1：16
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53.2
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51
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40.3
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2-3/8UPTBG
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1：16
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77.8
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62.8
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67.5
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2-3/8UPTBG
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1：16
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65.9
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64
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50.3
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2-7/8UPTBG
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1：16
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93.2
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75.5
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80.2
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2-7/8UPTBG
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1：16
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78.6
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76
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62
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3-1/2UPTBG
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1：16
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114.3
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92.2
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96.9
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3-1/2UPTBG
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1：16
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95.2
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92
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75.9
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4UPTBG
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1：16
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127.0
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104.9
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109.6
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4UPTBG
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1：16
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108.0
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104
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88.6
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4-1/2UPTBG
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1：16
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141.3
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117.6
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122.3
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4-1/2UPTBG
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1：16
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120.6
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117
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100.3
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How to order Cross-over Subs
When ordering, please specify:
• O.D.,I.D., and length.
• Connections, size, and type.
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Rotary & Handling Tools
