INSTALLATION FOR INJECTION OF LIQUID-GAS MIXTURE

• Main Authors: LOPATIN JU.S, PESHKOV L.P, MARTYNOV V.N
• Format: Patent
• Language: English
• Published: 27.06.2000
• Edition: 7
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

applicable in drilling and development of oil and gas wells. SUBSTANCE: installation has several pump sections, each of them includes a working cylinder with a working chamber formed in it and a piston member, suction and delivery valves, additional chamber with the delivery valve installed in its upper part for communication of this chamber with an independent gas or liquid-gas mixture source at a suction stroke. The driving gear incorporates a crankshaft. The reservoir for transferred liquid, and the suction manifold communicate with the above reservoir. The piston member of each pump section is made in the form of a plunger provided with an additional piston comprising the piston member with a rod located in the additional chamber aligned with the pump working chamber. Installed in the body of the piston member are a check valve, opening at a suction stroke, and a throttle valve. The piston chamber of the additional piston communicates with the additional valve assembly , communicating, in turn, with the suction manifold of the installation. The additional valve assembly has a body accommodating the suction and delivery valves. The chamber of this body under the suction valve communicates with the suction manifold of the installation, and the chamber above the delivery valve - with the lower part of the booster chamber. The rod of the additional piston is rigidly linked with the plunger. The additional chamber may be made in the form of an extension piece rigidly fastened to the working cylinder of the pump section. A modification of the invention provides for making the additional chamber inside the plunger and making in the rod of an additional piston of a through duct communicating with the body chamber of the additional valve assembly. The rod may be rigidly attached to the cover of the working cylinder. One more modification provides for an additional valve assembly with one valve member. EFFECT: prevented negative torques on the crankshaft of the installation drive, enhanced reliability of operation, reduced mass and enhanced durability.