Cement mixing system for oil well cementing
OwnerThomas E. Alleninventor
Life of this patent
Estimating the term…
Abstract
A powder mixing system and mixer for mixing cement used in cementing oil wells or other similar dry powder mixtures. The mixer is provided with a central recirculation jet and with annularly located alternating recirculation and mix water jets that discharge into the mixing chamber of the mixer in an overlapping fashion to effectively wet dry cement introduced into the mixing chamber. The mix water jets are formed from a set of slots provided both in a rotatable element and from another set of slots provided in a stationary portion so that when the rotatable element rotates, the size of mix water jets is adjusted. Two inlet elbows attach to the inlet of the central recirculation jet to cause the flow from the jet to rotate in a diverging pattern.
Claims22
A powder mixer for mixing a dry powder with liquid comprising:
- a powder mixer having a centrally located central recirculation line terminating in a mixing chamber of the powder mixer for continuously recirculating wetted powder mixture centrally into the mixing chamber,
- said powder mixer being provided annularly with recirculation outlets that discharge into the mixing chamber for continuously recirculating wetted powder mixture annularly into said mixing chamber, and
- said powder mixer being provided annularly with adjustable water jet outlets in alternating arrangement with said recirculation outlets that discharge into the mixing chamber for regulating the amount of mix water introduced annularly into said mixing chamber of the powder mixer.
A powder mixing method for mixing powder for use in high volume mixing applications comprising:
- introducing recirculating wetted powder mixture via a nozzle provided on a central recirculation line centrally into a mixing chamber of a powder mixer,
- introducing recirculating wetted powder mixture via recirculation outlets provided annularly in said mixture annularly into said mixing chamber,
- introducing a regulated amount of mix water via adjustable water jet outlets located in said mixer in alternating arrangement with said recirculation outlets into said mixing chamber, and
- introducing dry bulk powder via a bulk powder inlet provided in said mixer into said mixing chamber between the central recirculation line and the recirculation outlets so that the mix water and recirculating wetted powder mixture thoroughly wet and mix with the dry bulk.
A powder mixer for mixing a dry powder with liquid comprising:
- a powder mixer being provided annularly with recirculation outlets that discharge into a mixing chamber of the powder mixer for continuously recirculating wetted powder mixture annularly into said mixing chamber, and
- said powder mixer being provided annularly with adjustable water jet outlets in alternating arrangement with said recirculation outlets that discharge into the mixing chamber for regulating the amount of mix water introduced annularly into said mixing chamber of the powder mixer.
A powder mixer for mixing a dry powder with liquid comprising:
- a powder mixer having a centrally located central recirculation line terminating in a mixing chamber of the powder mixer for continuously recirculating wetted powder mixture centrally into the mixing chamber,
- said powder mixer being provided annularly with recirculation outlets that discharge into the mixing chamber for continuously recirculating wetted powder mixture annularly into said mixing chamber,
- a bulk powder inlet provided in said mixture for introducing bulk dry powder into the mixing chamber of the mixer between the central recirculation line and the annular recirculation outlets,
- the annular recirculation outlets converge inwardly within the mixing chamber and a nozzle at the exit of the central recirculation line diverges outwardly within the mixing chamber causing flow from the outlets and nozzle to intersect and thoroughly wet and mix with any dry bulk powder that is introduced into the mixing chamber,
- inlet elbows attached to the inlet of the central recirculation line to cause the flow within the central recirculation line to rotate which promotes a diverging pattern when the slurry exits the central recirculation line.
A powder mixing method for mixing powder for use in high volume mixing applications comprising:
- introducing recirculating wetted powder via recirculation outlets provided annularly in said mixer annularly into a mixing chamber of a powder mixer,
- introducing a regulated amount of mix water via adjustable water jet outlets located in said mixer in alternating arrangement with said recirculation outlets into said mixing chamber, and
- introducing dry bulk powder via a bulk powder inlet provided in said mixer into said mixing chamber centrally within the recirculation outlets so that the mix water and recirculating wetted powder mixture thoroughly wet and mix with the dry bulk powder.
A powder mixing method for mixing powder for use in high volume mixing applications comprising:
- introducing recirculating wetted powder mixture via a nozzle provided on a central recirculation line centrally into a mixing chamber of a powder mixer,
- introducing recirculating wetted powder mixture via recirculation outlets provided annularly in said mixture annularly into said mixing chamber, and
- introducing dry bulk powder via a bulk powder inlet provided in said mixer into said mixing chamber between the central recirculation line and the recirculation outlets so that the recirculating wetted powder mixture thoroughly wets and mixes with the dry bulk powder.
Dependencies are inferred from the claim text.