Bottom valve with sand preventing function
A function and sand control technology, applied in borehole/well parts, borehole/well valve device, earthwork drilling and mining, etc., can solve the problems of ball ball preparation for sand burial, failure to wash wells, etc., to prevent sand burial Ball, unique design, novel structure effect
Inactive Publication Date: 2015-12-30
长春市恒大石油机械有限公司
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Problems solved by technology
[0002] At present, when domestic oilfields are injecting water into wells, due to the sand settling in the water injection string falling to the bottom, it is very easy to cause the ball to be buried with sand, resulting in failure to wash the well
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[0008] refer to figure 1 Shown, the present invention is made up of 1, upper joint 2, valve cover 3, valve ball 4, constant pressure piston 5, constant pressure pin 6, constant pressure sleeve 7, valve seat 8, lower joint, is characterized in that The upper joint 1 and the lower joint 8 are connected by threads, the constant pressure piston 4 and the constant pressure sleeve 6 are connected by pins, the constant pressure sleeve 6 and the valve cover 2 are connected by sliding fit, and the valve cover 2 and the valve seat 7 are threaded Connection, the valve seat 7 and the lower joint 8 are connected by positioning welding.
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The invention provides a bottom valve with a sand preventing function and belongs to one of oil field downhole tools. At present, when well water injection is carried out in a domestic oil field, as setting sand in a water injecting pipe column falls into the bottom, a valve ball is buried by the sand easily, and as a result, well washing can not be carried out. Accordingly, it is badly in need of the bottom valve with the sand preventing function to solve the problem.
Description
technical field [0001] The invention relates to a pipe string used for water wells to plug a bottom valve, in particular to a bottom valve with a sand control function. Background technique [0002] At present, when domestic oilfields are injecting water into wells, due to the sand settling in the water injection pipe string falling into the bottom, it is very easy to cause the ball ball to be buried with sand, resulting in failure to wash the well. Therefore, there is an urgent need for a bottom valve with sand control function to solve this difficult problem. Contents of the invention [0003] The present invention is made up of: 1, upper joint 2, valve cover 3, valve ball 4, constant pressure piston 5, constant pressure pin 6, constant pressure sleeve 7, valve seat 8, lower joint. [0004] The working principle of the present invention is: the bottom valve is provided with a sand setting channel and a well washing channel, both of which are designed as a bridge mechani...
Claims
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IPC IPC(8): E21B34/04
Inventor 王刚
Owner 长春市恒大石油机械有限公司