SHANDONG SAIGAO GROUP CORPORATION
SHANDONG SAIGAO GROUP CORPORATION

Circulation Head, Crossover Sub

Application of Circulation Head, Crossover Sub

Circulation head (circulation swage) a special joint used to circulate drilling fluid, connecting to the kelly or drill pipe, the bottom connects to the casing during casings are running or after. Depends on request, there are drill pipe thread circulation head, casing thread circulation head, union thread circulation head. Its top end connects to drill pipe via drill pipe thread, or connects to the hose, the bottom connects to casing joint via casing BTC (LTC/STC).


Model of Circulation Head, Crossover Sub

thread box * casing thread pin


Technical Parameters of Circulation Head, Crossover Sub

Hammer union box sub * Casing thread pin


Size (in)


O.D. (mm)


I.D. (mm)

Top Box Con.


Bottom Pin Con.


Length (mm)


W.P. (psi)

4W

121

50.8

2n FIG 1502F

4" Casing Thread

500

5000

4-l/2w

121

50.8

2" FIG 1502F

4-l/2w Casing Thread

5W

128

50.8

2n FIG 1502F

5" Casing Thread

5-l/2ff

145

50.8

2" FIG 1502F

5-1/2" Casing Thread

5-3/4w

148

50.8

2n FIG 1502F

5-3/4" Casing Thread

6-5/8w

178

50.8

2" FIG 1502F

6-5/8" Casing Thread

1"

179

50.8

2n FIG 1502F

7" Casing Thread

7・5/8"

195

50.8

2" FIG 1502F

7-5/8" Casing Thread

7-3/4"

198

50.8

2n FIG 1502F

7-3/4" Casing Thread

7-7/8H

202

50.8

2" FIG 1502F

7-7/8" Casing Thread

8-5/8w

222

50.8

2n FIG 1502F

8-5/8w Casing Thread

9-5/8"

270

50.8

2" FIG 1502F

9-5/8" Casing Thread

9-7/8"

270

50.8

2" FIG 1502F

9-7/8" Casing Thread

10-3/4w

275

50.8

2" FIG 1502F

10-3/4" Casing Thread

1—3/4"

300

50.8

2" FIG 1502F

11-3/4" Casing Thread

12-3/4"

326

50.8

2" FIG 1502F

12-3/4B Casing Thread

13-3/8"

342

50.8

2" FIG 1502F

13-3/8" Casing Thread

13-5/8"

348

50.8

2" FIG 1502F

13-5/8" Casing Thread

16"

410

50.8

2" FIG 1502F

16" Casing Thread

16-3/4"

428

50.8

2" FIG 1502F

16-3/4" Casing Thread

18-5/8"

475

50.8

2" FIG 1502F

18-5/8" Casing Thread

20"

510

50.8

2" FIG 1502F

20" Casing Thread


Hammer union box sub * Drill pipe pin

Size (in)


O.D. (mm)


I.D. (mm)

Top Box Con.

Bottom Pin Con.

Length (mm)


W.P. (psi)

2-7/8K

105

50.8

2" FIG 1502F

2-7/8" IF(NC31)

305

7500

3-1/2"

121

50.8

2" FIG 1502F

3-1/2" IF(NC38)

4"

146

50.8

2" FIG 1502F

3-1/2" IF(NC38)

4-l/2w

158

50.8

T FIG 1502F

3-1/2" IF(NC38)

5"

158

50.8

2" FIG 1502F

4-1/2" IF (NC50)

5-l/2w

185

50.8

2" FIG 1502F

FH 5-l/2w


Drill pipe thread box * casing thread pin

Specification (mm)

ID mm

Thread type of ends

API drill pipe box

Casing pin

88.9x139.7

57

NC38

5-1/2" BTC/LTC/STC

114.3x139.7

71

NC50

5-1/2" BTC/LTC/STC

114.3x177.8

71

NC50

7” BTC/LTC/STC

114.3x193.7

71

NC50

7・5/8" BTC/LTC/STC

114.3x219.1

71

NC50

8-5/8" BTC/LTC/STC

114.3x244.5

71

NC50

9-5/8" BTC/LTC/STC

114.3x273.0

71

NC50

10-3/4" BTC/LTC/STC

114.3x339.7

71

NC50

13-3/8" BTC/LTC/STC

114.3x580.0

71

NC50

20" BTC/LTC/STC



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