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
Pump down system for placing and retrieving subsurface well equipment
摘要
申请公布号
USRE31155(E)
申请公布日期
1983.02.22
申请号
US19790064333
申请日期
1979.08.06
申请人
发明人
分类号
E21B23/03;E21B23/10
主分类号
E21B23/03
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Transferring bulk goods from one container to another - using air-lock chamber and pressure equalisation procedures to assist transfer operation
Automatic vehicle battery disconnector actuated in accident - has switch opened by solenoid coupled to battery and changeover switch responsive to turning over
Control panel display signal - formed by two laminated pref. polycarbonate discs the front carrying indicia being tinted grey and rear tinted with indicia colour
Securing arrangement for connecting ends of tubes - has sleeve with end fingers clamped on tube by circumferential straps
Door or window handle - has axially sliding spindle which can be disengaged from latch mechanism
Floating cover for oxygen sensitive liquid - is filled with material to adjust immersion depth
Quick break switch with operating pusher - has snap action element interacting with pusher, and permanent magnet energy store
Valve liquid or gas seal - has elastic body with ring section from which other sections extend downwards
Cyclonic appts. for removing particles from gases - has rotating element that swirls gas to produce centrifugal force on particles
Electrically powered hand drill - has undervoltage protection relay operated by main switch with contacts in one or both supply leads
Compact low profile emergency vehicle - has engine behind cab which is positioned a head of front wheels and includes central drivers seat
Vehicle pneumatic brake system - has hand brake assembly with spring tensioned at storage pressure by piston in cylinder with double seat valve
Self-processing conversion for camera - replaces normal camera back portion by self-processing magazine
Optical sensing system above roulette table - automatically records all winning numbers by coded signals derived from reflection from balls in end position
Refrigerator capillary tube throttling element - has swirler tube at dryer end preventing dirt entry to capillary
Baking oven with cooling air conduits - has fume discharge in cooling air outlet above casing
Adjustable mine support behind face conveyor - has auxiliary arms between floor member and rear shield swung by lower cylinders
Circuit board or contact support - has holes in which component leads or pins are placed and subsequently dip soldered
Document locating filing system - has characteristic word assigned to each document and contains search and select device
Oil bath for checking sensitivity of ultrasonic instruments - consists of thick plastic vessel containing oil held at constant temp. by heater, agitator and thermometer sensors