|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/15 ; 131/238 ; 138/45 ; 166/91|
|발명자 / 주소|
|인용정보||피인용 횟수 : 9 인용 특허 : 1|
Mud choke apparatus is disclosed, and the preferred embodiment has the form of a hollow, tubular body receiving a mud flow introduced from a lateral port, the flow being directed through an axial passage and past a valve seat. The valve seat is a replaceable, hardened metal liner and is formed with a gradual taper so that the mud flows from the large end through the tapered, smaller end. Thereafter, it flows out of the body through an axial opening. The flow of mud is throttled by a tapered, hardened plug serving as a valve element which is received into...
A method of controlling drilling mud flow in a drilling mudchoke which choke includes: a hollow valve body having a passage therethrough; a valve seat having an encircling, tapered face surrounding an axial passage for directing mud flow past said tapered face and along said passage within said valve body; an encircling circular valve seat shoulder in a plane perpendicular to the flow through said axial passage which shoulder defines an upstream located closure face cooperatively positioned relative to said valve seat tapered face; a valve element having...