CN2849228Y

CN2849228Y - Multifunction bottom valve

Info

Publication number: CN2849228Y
Application number: CN 200520115161
Authority: CN
Inventors: 马文廷
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-19
Filing date: 2005-07-19
Publication date: 2006-12-20
Anticipated expiration: 2015-07-19

Abstract

The utility model provides a multifunction bottom valve, which relates to a mechanical oil extraction accessory in oil fields. The utility model is characterized in that the lower end of a fishing head is provided with a valve ball, a valve seat is arranged in a valve seat sleeve and the upper end of the valve seat sleeve is connected with a valve body via threads. The upper end of a fishing tube is fixedly connected with an upper cover, two long slots and two short slots are arranged in the fishing tube and the long and the short slots are separately and uniformly distributed and are mutually communicated. The outside of the upper cover is provided with longitudinal passing slots, the upper cover is arranged in the valve body and a spring is arranged between the upper cover and a spring base. The utility model has the advantages that the bottom valve can cause the inside and the outside of an oil pipe to be communicated, so the crude oil in the oil pipe can be discharged back into a well tube for convenient oil well work and the utility model can prevent field pollution and can avoid crude oil wasting. The utility model can also be provided with positive well washing and other processes and can separate the inside and the outside of the oil pipe so as to carry out normal oil extraction work, and the utility model is suitable for mechanical oil extraction in deep well pumps.

Description

Multifunctional foot valve

Technical field

The utility model relates to the accessory of mechanical oil recovery middle-deep well pump on a kind of oil field.

Background technique

In the mechanical oil recovery equip ment on the oil field, the maximum of usefulness are exactly deep-well pump.It is installed in the pump barrel by piston forms, and has moving valve in the piston upper end, has standing valve in the pump barrel lower end.Standing valve is to be made of on valve seat the valve ball seat, will separate inside and outside the oil pipe, and the crude oil in the oil pipe can only be thus lifted on the ground under the effect of piston, goes and can not flow back in the pit shaft again.When if oil well need carry out operation, standing valve can not be opened, retained crude oil in whole oil pipes more than standing valve, have only oil pipe is lifted out the screw thread that unclamps behind the ground between the oil pipe, crude oil just can flow out, and so not only can waste crude oil, also can pollute the well site, cause environmental pollution, influence operating personnel's safety in production.On the oil well that uses this deep-well pump, because of not opening standing valve artificially, can not form circulation loop, some technological measure is carried out in influence, need adopt the oil well of positive well-flushing operation just can not normally carry out positive clean-out service as some.

The model utility content

The purpose of this utility model is that a kind of multifunctional foot valve of design is used for replacing the standing valve in the deep-well pump, can open it as required or close.

Technical solution of the present utility model is achieved in that a kind of multifunctional foot valve, is made of valve ball and valve seat, and its special way is that (1) valve ball is installed in the fishing head lower end, has bailer grab on the fishing head.(2) valve seat is installed in the valve seat cover, and the valve seat set upper side connects with valve body mutually by screw thread, and spring seat is installed between them, and valve seat cover lower end connects with lower contact mutually by screw thread.(3) basket barrel upper end and last cap are fixedly installed togather, and have 2 elongated slots and 2 short grooves in the basket barrel, and the length groove evenly distributes at interval and is interconnected, and the last cap outside has vertical groove, and last cap is contained in the valve body.(4) upward between cap and the spring seat spring is housed.

The utility model usefulness is, (1) this bottom valve is installed in the deep-well pump, when the promotion basket barrel moves down under the effect of cap on it in external force, make the bailer grab of fishing head upper end enter into the interior elongated slot of basket barrel, under the guiding on skewed slot edge, enter into short groove again, basket barrel and fishing head are bound up, this moment, valve ball separated with valve seat, made the inside and outside connection of oil pipe, so both the crude oil in the oil pipe can be put back in the pit shaft, be convenient to carry out the oil well operation, prevent the well site pollution, the crude oil that also can avoid waste also can carry out technological measures such as positive well-flushing.(2) when last cap pushes away down again, basket barrel and fishing head are broken away from, valve ball is located on the hole of valve seat, make foreign minister's separation in the oil pipe, this moment, valve ball just was equivalent to the standing valve of deep-well pump, can open or close along with the lifting of deep-well pump, carried out normal oil extraction operation.

Description of drawings

Fig. 1 is a cross-sectional view of the present utility model.

Fig. 2 is that the length groove in the basket barrel launches schematic representation.

Embodiment

Have elongated slot 12 and short groove 13 in the basket barrel 4, elongated slot 12 lower ends one side is along being the inclined-plane, and upper end one side of its upper end and short groove 13 is connected, and the lower end edge of short groove 13 is an inclined-plane, and opposite side upper end and another elongated slot of short groove 13 are connected the upper edge indentation of groove.The bailer grab that both sides, fishing head 6 top have short cylindrical shape.Have 4-8 road cannelure in the outside of last cap 2, last cap 2 and basket barrel 4 are bound up by ring like steel wire 3 or dowel fixes.The top of spring 5 is enclosed within on the basket barrel 4, and its underpart is enclosed within on the fishing head 6.Valve ball 8 is installed in the bottom of fishing head 6, and rotatable.To go up cap 2 basket barrels 4, spring 5, fishing head 6 is contained in the valve body 1.Valve seat overlaps 9 upper ends and is bound up by screw thread and valve body 1, and spring seat 7 is housed between them, has through hole on the spring seat 7.Valve seat 10 is contained in the valve seat cover 9, and lower contact 11 is bound up by screw thread and valve seat cover 9.Valve body 1 upper end connects mutually by the pump barrel of screw thread and deep-well pump, is lowered in the oil well with oil pipe.

Claims

A kind of multifunctional foot valve is made of valve ball (8) and valve seat (10), and it is characterized in that: valve ball (8) is installed in fishing head (6) lower end, and fishing head (6) upper end has bailer grab; Valve seat (10) is installed in the valve seat cover (9), and valve seat cover (9) upper end connects with valve body (1) mutually by screw thread, and spring seat (7) is installed between them, and valve seat cover (9) lower end connects with lower contact (11) mutually by screw thread; Basket barrel (4) upper end and last cap (2) are fixedly installed togather, and have 2 elongated slots and 2 short grooves in the basket barrel (4), and the length groove evenly distributes at interval and is interconnected, and last cap (2) outside has vertical groove, and last cap (2) is contained in the valve body (1); Between last cap (2) and the spring seat (7) spring (5) is housed.