Abstract
The invention discloses a hydraulic reversing mechanism. The hydraulic reversing mechanism comprises an upper joint, a center shaft, a guide ring, an upper shell, a guide pin, a connection nipple, a compression spring, a lower shell, a limiting sleeve and a lower joint, wherein the upper joint is connected with the center shaft, the guide ring is arranged between the upper joint and the upper shell, and the upper shell, the connection nipple, the lower shell and the lower joint can be slidably arranged on the outer side of the center shaft. The guide pin is arranged on the upper shell, a guidegroove is formed in the portion, corresponding to the guide pin, of the center shaft, the guide pin can rotate in the guide groove, a compression cavity is defined by the connection nipple, the lowershell, the lower joint and the center shaft, and the compression spring and the limiting sleeve are arranged in the compression cavity. The hydraulic reversing mechanism has the benefits that the hydraulic reversing mechanism can be used for rotational reversing of a sand washing tool, the washing operation is more sufficient, no atomization is generated, and the washing capacity is ensured. According to the hydraulic reversing mechanism, reversing is achieved under the hydraulic action, the structure is simple, and convenience is brought to installation, disassembly and maintenance. The large-discharge-capacity cleaning work can be met, and rotary jetting to the washing tool can be achieved.
Description
technical field
[0001] The invention relates to the technical field of oil exploitation equipment, in particular to a hydraulic reversing mechanism. Background technique
[0002] In oil extraction operations, due to the production of sand and other impurities in the formation, the productivity of the production well will be greatly reduced. In order to increase the productivity again, it is necessary to wash the sand and impurities at the bottom of the well. Conventional sand washing tools are common flushing heads with holes or nozzles or rotary flushing tools at present, which have the following disadvantages: when using common flushing heads with holes or nozzles for flushing operations, the flushing direction of the flushing head is not fixed. Changed, it is easy to cause insufficient flushing. When using a rotary flushing tool, the rotation of the rotary nozzle is driven by the reaction force of the high-pressure liquid. When the displacement is increased for well flus...
