CN2637770Y - Sand delivery device on screw pump oil extracting well pump - Google Patents

Abstract

The utility model relates to an inside pump sand discharging device for screw pump wells applied in the screw pump well production, consisting of an upper body 1, a lower body 9, a jacket 2, an upper press cap 3, a lower press cap 7, a ring-shaped valve 5, an upper spigot 6 and a lower spigot 8. The device has simple structure, low cost, and is practical, convenient, safe and reliable and can be applied to effectively prevent the setting sand from affecting the start-up and normal work of the screw pump when the screw pump operates or stops pumping, thereby guaranteeing the normal production of screw pump wells and the device is suitable for popularization and application.

Description

Screw pump oil production well pump upper sand-unloading device

Technical field:

The utility model relates to a kind of downhole hardware that screw pump oil production well is produced that is used for.

Background technique:

Shaking out is a key factor that influences oil well output and ordinary production, at this difficult problem field by using of sand production various protection methods, process engineering and kit facility.Wherein, to take that sand cooling adopts be to separate one of effective ways that decided the fine sand oil well production to screw pump.Yet in the screw pump oil production well production process, in a single day the sand in the pit shaft in the sand-laden fluid stream precipitates, and can damage screw pump, and rotor is buried extremely, makes it can't start production and can't repairing and reusing.At present, on-the-spot measure and the device that addresses the above problem that still lack.

Goal of the invention:

The purpose of this utility model be to provide a kind of can effectively prevent screw pump running or stop pumping the time sand setting cause rotor to turn round to open the screw pump oil production well pump upper sand-unloading device of taking out.

The utility model is to realize like this.This device is made up of upper and lower body, overcoat, upper and lower pressure cap, upper and lower seam, annular valve.The upper body lower end is connected with following body with screw thread; The upper body outside is set with annular valve, its top is set with upper pressing cap, be set with lower pressing cap between the last seam of its upper body bottom, below and the following seam on following body top, lower pressing cap is clamped by last seam and following seam, body can only be rotated and can not axial float; By upper and lower body and be sleeved on the upper and lower pressure cap of its outside and assembly that annular valve constitutes places in the overcoat, and be connected with the upper and lower internal thread of overcoat respectively by upper and lower pressure cap outside thread.When implementing screw pump oil production, this device is connected in the screw pump top, the overcoat upper and lower end connects oil pipe, and upper and lower body two ends connect shank.Along with the startup of pump, it is up that oily stream will promote annular valve, and the sand outlet that will put outward after the up certain distance of annular valve is blocked, and oil flow to ground on flowing to.When termination of pumping, there is not the liquid efflux pump, ring-like valve glides, and seals oil flow channel, and exposes sand outlet, and sand then can sink to the oil jacket annular space thus on the pump, thereby guarantees that rotor is not buried extremely by sand setting.

The utility model is simple in structure, and is with low cost, practical and convenient, safe and reliable, sand setting causes obstacle to its startup and proper functioning when utilizing it can effectively prevent screw pump running or stop pumping, thereby can guarantee the screw pump oil production well ordinary production, is suitable for and applies.

Description of drawings:

Accompanying drawing is a structural representation of the present utility model.

Embodiment: enforcement of the present utility model is illustrated below in conjunction with accompanying drawing.

As shown in the figure, the utility model is made up of upper body 1, overcoat 2, upper pressing cap 3, annular valve 5, last seam 6, lower pressing cap 7, following seam 8 and following body 9, and its structure assembled relation is as follows, and the screw thread of upper body 1 lower end is connected with following body 9; Upper body 1 outside is set with annular valve 5, and its top is set with upper pressing cap 3, the last seam 6 of below upper body 1 bottom and following body 9 tops following seam 8 between be set with lower pressing cap 7, lower pressing cap 7 is that last seam 6 is clamped with following seam 8, body can not axial float; By upper and lower body 1,9 and be sleeved on its outer upper and lower pressure cap 3,7 and assembly that annular valve 5 constitutes places in the overcoat 2, and be connected with overcoat 2 upper and lower end internal threads respectively by upper and lower pressure cap 3,7 outside threads.Wherein, upper body 1, following body 9 are respectively the open circles body of rod that upper and lower end is threaded, dimensional structure matches, and upper body 1 bottom, following body 9 tops are respectively equipped with step mo(u)ld top half seam 6 and following seam 8.Overcoat 2 is a upper and lower sleeve that is respectively equipped with internal thread, is uniformly distributed with a plurality of sand outlets 4 on its top barrel along the circumference, and internal diameter and annular valve 5, upper and lower pressure cap 3,7 external diameters match.Upper pressing cap 3, lower pressing cap 7 are is with externally threaded cirque body, and wherein the distance between the upper and lower seam of lower pressing cap 7 height and upper and lower body matches, and is uniformly distributed with a plurality of liquid openings on it along the circumference.Annular valve 5 is the hollow cylinder that an external diameter is slightly less than overcoat 2 internal diameters, can slide up and down in overcoat, and internal diameter is up-small and down-big.

Claims (1)

1, a kind of screw pump oil production well pump upper sand-unloading device, be made up of upper body (1), overcoat (2), upper pressing cap (3), annular valve (5), last seam (6), lower pressing cap (7), following seam (8) and following body (9), it is characterized in that: upper body (1) lower end is connected with following body (9) with screw thread; Upper body (1) outside is set with annular valve (5), its top is set with upper pressing cap (3), be set with lower pressing cap (7) between the last seam (6) of upper body (1) bottom, below and the following seam (8) on following body (9) top, lower pressing cap (7) is clamped for last seam (6) and following seam (8), and body can not axial float; By upper body (1), following body (9) and be sleeved on the assembly that its outer upper pressing cap (3), annular valve (5), lower pressing cap (7) constitute and place in the overcoat (2), and be connected with overcoat (2) upper and lower end internal thread respectively by upper pressing cap (3), lower pressing cap (7) outside thread.