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Product type:Oil Drilling Equipments and Parts--Drilling and Well Servicing Equipment
 
Name:Cross-Over Sub
Item:ydaer_1
Description:
      Cross-over sub serves to conversion and connection. It is the basic component in downhole work. It can be divided into drill string crossover and tubing crossover. Drill string cross-over is divided into type A, type B and type C.
 
Specification of Drill String Cross-Over joint
 Denotation
Top junction block
Lower junction block
Type
Kelly joint
Kelly
Drill pipe joint
Type A or B
Kelly joint
Drill pipe joint
Drill pipe joint
Type A or B
Drill pipe joint
Kelly
Drill collar
Type A or B
Crossover joint
Drill collar
Drill collar
Type A or B
Bit joint
Drill collar
Bit
Type A or B
Swivel joint
Swivel lower joint
Kelly
Type C
Fish joint
Kelly
Drill pipe joint
Type C
Drill pipe joint
Fishing tool
Type C
 
 
 
 
 
Specification of Tubing Cross-Over joint
External thread
Internal thread
Thread code name
Tapering
Large end diameter(mm)
Small end diameter(mm)
I.D.
(mm)
Thread code name
Tapering
Large end diameter(mm)
Small end diameter(mm)
I.D.
(mm)
1.900TBG
1:16
48.3
47
40.3
1.900TBG
1:16
55.9
66.1
49.9
2 3/8¡±TBG
1:16
60.3
59
40.3
2 3/8¡±TBG
1:16
73.0
58.1
61.9
2 7/8¡±TBG
1:16
73
70
62
2 7/8¡±TBG
1:16
88.9
70.8
74.6
3 1/2¡±TBG
1:16
88.9
86
76
3 1/2¡±TBG
1:16
108.0
86.7
90.5
4¡±TBG
1:16
101.6
98
88
4¡±TBG
1:16
120.6
98.5
103.2
4 1/2¡±TBG
1:16
114.3
111
100.3
4 1/2¡±TBG
1:16
132.1
111.2
115.9
4 1/2¡±BCSG
1:16
114.7
112
100
1.900UPTBG
1:16
63.5
51.0
54.8
1.900UPTBG
1:16
53.2
51
40.3
2 3/8¡±UPTBG
1:16
77.8
62.8
67.5
2 3/8¡±UPTBG
1:16
65.9
64
50.3
2 7/8¡±UPTBG
1:16
93.2
75.5
80.2
2 7/8¡±UPTBG
1:16
78.6
76
62
3 1/2¡±UPTBG
1:16
114.3
92.2
96.9
3 1/2¡±UPTBG
1:16
95.2
92
75.9
4¡±UPTBG
1:16
127.0
104.9
109.6
4¡±UPTBG
1:16
108.0
104
88.6
4 1/2¡±UPTBG
1:16
141.3
117.6
122.3
4 1/2¡±UPTBG
1:16
120.6
117
100.3
 
1:16
 
 
 
 
Kelly Stem Protective Joint Operation Instructions
1¡¢  Applications
Kelly stem protective joint(It is also called casing protector)is applied to normal drilling after dropped surface casing or technical casing.It connects to the lower position of kelly stem.During drilling it is mainly prevent kelly stem being swung too much.
It would be happened friction and collision with casing internal wall to damage casing or kelly stem.It has realized double protective actions.
2¡¢  Structure
Kelly stem protective joint mainly consisits of joint and wear-resisting rubber protective collar.See structure schematic diagram.
3¡¢  Technical Specifications and Parameters
Type
Joint outside diameter
Joint thread
Max.outside diameter
waterhole
FBQ-9 5/8
178
NC50
213
76
FBQ-13 3/8
178
NC50
310
76
It can be supplied upon consumer¡¯s request to design or produce.
1 2

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