Downhole jet unit for testing and completing wells

F - Mech Eng,Light,Heat,Weapons – 04 – F

Patent

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Details

F04F 5/54 (2006.01) F04F 5/02 (2006.01) F04F 5/46 (2006.01)

Patent

CA 2434235

The invention relates to pumping engineering, mainly to downhole jet production units. The inventive downhole jet unit comprises a packer, a pipe column and a jet pump. An active nozzle and a mixing chamber are axially arranged in the body of the jet pump, and a pass channel provided with a mounting face for a sealing assembly with an axial channel is embodied therein. Said unit is also provided with an irradiator and a receiver transformer of physical fields. Said receiver transformer is arranged on the side of entry of a liquid pumped from the well into the jet pump and mounted on a cable passing through the axial channel of the sealing assembly. The output of the jet pump is connected to the pipe column above the sealing assembly. The input of a channel for feeding the pumped out medium of the jet pump is connected to a space around the pipe column below the sealing assembly. The input of a channel supplying a working medium to the active nozzle is connected to a space around the pipe column. A number of channels for feeding the pumped out medium are embodied in the body of the jet pump. The invention makes it possible to optimise dimensions of various elements of the unit, thereby increasing the operating reliability of the downhole jet unit.

L'invention relève de l'équipement de pompage, en particulier des dispositifs à jet de fond de trou utilisés dans l'extraction du pétrole des puits. Le dispositif à jet de fond de trou comprend un packer, une colonne de tubes et une pompe à jet. Le corps de cette pompe comprend une buse active dotée d'une chambre de mixage et d'un canal de circulation muni d'un logement destiné à accueillir un bloc d'étanchéité qui comporte un canal axial. Ce dispositif est également équipé d'un élément rayonnant et d'un récepteur transformateur de champs physiques, qui sont aménagés du coté de l'entrée du liquide pompé dans la pompe à jet et montés sur un câble. La sortie de la pompe à jet est reliée à l'espace entourant la colonne de tubes. L'entrée du canal d'admission de liquide pompé de la pompe à jet est reliée à la colonne de tubes en aval du bloc d'étanchéité, et l'entrée du canal d'amenée de fluide de travail à la buse active est reliée à la cavité autour de la colonne de tubes. Le corps de la pompe à jet comprend un certain nombre de canaux d'admission du liquide pompé. L'invention permet d'optimiser les dimensions des différents éléments de la structure du dispositif, ce qui augmente la fiabilité de fonctionnement du dispositif à jet de fond de trou.

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