Inventor

AKKERMAN NEIL H

US81 patents

⚠️ This page may combine multiple inventors who share the name “AKKERMAN NEIL H”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

AKKERMAN NEIL H

AVA INT CORP

Fail safe valve actuator

Methods and apparatus for perforating and treating production zones and otherwise performing related activities within a well

Rorque limiting device

Well installation in which electrical current is supplied for a source at the wellhead to an electrically responsive device located a substantial distance below the wellhead

Well slip assemblies

Subsurface safety valve

Valves

Well apparatus

Wire line running and/or pulling tool

Flow controlling apparatus

Flow controlling apparatus

Well apparatus including a tool for use in shifting a sleeve within a well conduit

Pneumatic valve actuators

Valves and valve actuators

Subsurface tubing safety valve

Tool for lowering into centered position within a well bore

Well packers

Releasable latching apparatus

Apparatus for use in controlling flow through a tubing string suspended and packed off within well bore as well as within the annulus between the tubing string and well bore above and below the packer

Multiple string well packer

Well apparatus

Well packers

Well apparatus

BAKER INT CORP

Valve for subterranean wells

Valve and lubricator apparatus

Locking apparatus for use in a subterranean well

Safety valve and ball type equalizing valve

Cyclic annulus pressure controlled oil well flow valve and method

Apparatus and method for the mechanical sequential release of cementing plugs

Quick disengaging valve actuator

Valve actuator and pilot assembly therefor

Valve and lubricator apparatus

AKKERMAN NEIL H

Well tool having a slip assembly

Top-down fracturing system

Disconnect assembly for cylindrical members

High efficiency blood pump

System for mounting an engine to a frame

EVERHEART SYSTEMS INC

High efficiency blood pump

Cardiac support systems and methods for chronic use

High efficiency blood pump

AVA INTERNATIONAL

Hydraulically operated permanent type well packer assembly

Subsurface well apparatus

Well packers and slip assemblies for use therewith

ABER GREG S

Cardiac support systems and methods for chronic use

DRESSER IND

Subsurface tubing safety valve

(unassigned)

Surface controlled, subsurface tubing safety valve

BAKER OIL TOOLS INC

Method and removable auxiliary apparatus for permanently locking open a well flow control device

BAKER GAC INC

Actuator for converting linear to rotary motion

AVA INTERNATIONAL INC

Subsurface tubing safety valve

AVAA INTERNATIONAL CORP

Apparatus in which an annular ring is carried within a groove about one member for slidably engaging the cylindrical surface of another member