首页
产品
黄页
商标
征信
会员服务
注册
登录
全部
|
企业名
|
法人/股东/高管
|
品牌/产品
|
地址
|
经营范围
发明名称
Fres for freseoperasjoner i borehull
摘要
申请公布号
NO981666(D0)
申请公布日期
1998.04.14
申请号
NO19980001666
申请日期
1998.04.14
申请人
WEATHERFORD/LAMB INC
发明人
PLEASANTS, CHARLES W.
分类号
E21B7/06;E21B7/08;E21B10/50;E21B23/04;E21B23/06;E21B29/06;E21B34/10;(IPC1-7):E21B29/06;E21B23/10
主分类号
E21B7/06
代理机构
代理人
主权项
地址
您可能感兴趣的专利
GAIN CONTROLLED DIFFERENTIAL AMPLIFIER
RADIO TRANSMITTER FOR SPEECH INFORMATION, BUSY AND SWITCHING SIGNALS
DEIONIZING DEVICE FOR AERIAL ELECTRIC LINES
HYDROGEN GETTER FOR HIGH PRESSURE GAS DISCHARGE LAMP
ASTIGMATIC LENS ELECTRON GUN
Reflex copier lens
Bag holder
Reciprocating drive method of mining and apparatus therefor
Separation device for releasing parachutes
Seal assembly with backup ring
Bowling ball control device
Apparatus for handling sheets of material
Pulley lift assembly and curtain system employing same
Apparatus for continuously accumulating a travelling metal strip or wire-like material
Snap-on, wire pay-off cap assembly
Device for storage of skis
Embrittlement-resistant tantalum wire
Loading device
Beam cell and multiple cell type structural elements with varying spring constants
Feeder unit and method for use in a weighing system