136微拍宅男导航在线-国产精品伦一区-中文字幕+乱码+中文字幕无忧-老司机亚洲精品影院无码-久久天堂综合亚洲伊人hd-中文字幕网站在线观看-国产精品国产三级国产普通话对白-免费看的av网站-亚洲美女性生活-亚色视频-高清亚洲-四虎无码永久在线影库网址一个人-国产一区日韩-国产精品露脸视频-少妇人妻丰满做爰xxx

Application:

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). ?

Features:

1. Its upper end is drill pipe box or union, the nether end is casing pin. It is a crossover(X/O) with hollow inside.

2. Main body are made from heat treated alloy steel. Connected with union by internal and external argon arc welding, high strength, resistance to high pressure, safety and reliability.

Confirmation when order:

1) Overall length and length of neck. ?

2) Thread type of top end. ?

3) Thread type of bottom end. ?

Model:

Hammer union box sub * Casing thread pin, ?

Hammer union box sub * Drill pipe pin, ?

Drill pipe thread box * casing thread pin

Specification: ?

20”, 18-5/8”, 13-3/8”, 10-3/4”, 9-5/8”, 7-5/8”, 7”, 6-5/8”, 5-1/2”, 5”, 4-1/2”, 4”