Abrégé

The invention relates to a device (1) for producing high-pressure pulses, comprising a housing (2) having a pressure chamber (8), which can be filled with a fluid under pressure by means of a high-pressure supply line (9), wherein the housing (2) has at least one outlet opening (10), which leads from the pressure chamber (8) to the surroundings, a valve unit, which can be moved depending on a pressure inside the pressure chamber (8) between a first switching position, in which the valve unit closes the outlet opening (10), and a second switching position, in which the valve unit opens the outlet opening (10), wherein in the second switching position of the valve unit (14) at least a partial amount of the fluid can be discharged from the pressure chamber (8) to the surroundings through the open outlet opening (10) under pressure so that a high-pressure pulse is thereby produced, wherein the valve unit (14) is arranged substantially completely inside the pressure chamber (8).

Classes IPC  ?

• E21B 37/08 - Nettoyage sur place des filtres de fond de trou, des tamis, ou des filtres à gravier
• E03B 3/15 - Maintien des puits en bon état, p. ex. par nettoyage, réparation, remise en étatMaintien ou accroissement de la capacité des puits ou des couches aquifères
• E21B 34/10 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par un fluide de commande provenant de l'extérieur du trou de forage

Abrégé

The invention relates to a displaceable pipe (3) between connecting parts (1, 2) of a hydraulic system that are displaceable relative to each other, particularly between an input connection of a suction valve of a displacement pump and an output connection of a suction collecting line of said pump, characterized by two pipes (5, 6) telescopially inserted into each other while forming an axial annular gap (4), the free face edges (7) of the pipes being tightly pressed against the circular counter-surfaces (8) of the connecting parts (1, 2), wherein the diameter of the sealing contact zone formed between the face edges (7) and the counter-surface is smaller than the diameter of the annular gap (4).

Classes IPC  ?

• F16L 27/12 - Raccords réglablesRaccords permettant un déplacement des parties raccordées permettant réglage ou déplacement sensiblement longitudinal