CN2113339U

CN2113339U - Filter sand device by peach shell and resin

Info

Publication number: CN2113339U
Application number: CN 92200534
Authority: CN
Inventors: 王志信
Original assignee: HUANXILING OIL FIELD LIAOHE OIL EXPLORATION ADMINISTRATION
Current assignee: HUANXILING OIL FIELD LIAOHE OIL EXPLORATION ADMINISTRATION
Priority date: 1992-01-10
Filing date: 1992-01-10
Publication date: 1992-08-19

Abstract

The utility model relates to a sand filter by peach shell and resin for connecting with a downhole oil pumping pump in the pumping well for pumping oil in an oil field, belonging to the class of downhole oil production tool in the oil field. In the prior art, the sand prevention of the oil well mainly depends on a downhole sand elimination pump and a sand anchor sand filter made of a copper wire net, the tools can not eliminate sand thoroughly, in the operation of the oil pumping pump, sand in crude oil uniformly enters the oil pumping pump to some degree, and in addition, because the strength of a copper wire gauze outside a sieve tube is low, the copper wire net is easily damaged, and sometimes, the copper wire net can not achieve the effect of sand filtration. Because the outer part of the sieve tube is provided with one sand filtering cylinder consolidated by peach shell and resin, the technical shortages can be effectively overcome. The utility model has the advantages of novel structure, simple fabrication, good permeability and good sand filtering effect, and thus the utility model can be extensively used for the oil prevention of the oil well.

Description

Filter sand device by peach shell and resin

The utility model relates to a kind of down-hole sand preventing tool that is used for oilfield pumping well, particularly connects a kind of peach shell resin sand filter of oil well pump.

In oilfield downhole operation, various rod-pumped wells all adopt oil well pump that crude oil in the well is displaced into ground, because the crude oil in the oil well is often followed some sand grains in flowing, accelerated the degree of wear of oil well pump, for avoiding sand grains infringement oil well pump, occur all kinds in succession and removed sand pump, commonly used have a sand general formula oil well pump, elastic piston oil well pump etc., the characteristics of the type pump, all be to utilize the pump housing self to reach the sand control purpose, have the advantage that the holddown of being difficult for can improve oil well pump efficient, its drawback is that desanding does not thoroughly still have the part sand grains to enter in the pump barrel of oil well pump.Therefore, the oil well that has just adopts the way of sand anchor sand control; Its operating principle is screen casing of suspension below downhole pump, its skin is surrounded by metallic copper gauze net, carry out sand control, but sand card phenomenon still appears in oil well pump, its reason is that the copper wire cloth intensity above the filter sand tube is low, cause being filled in the gravel leakage in the screen casing, be difficult to play sand controlling result, even can cause oil pump not pump to influence crude oil production.

The utility model purpose is to provide a kind of oil well pump sand filter of improvement type, and fundamentally broken the conventional method of carrying out sand control with metal copper wire cloth bag gravel, this technology can overcome above-mentioned technical deficiency effectively and have novel structure, processing is simple, good penetrability, the filter sand effect is advantage preferably.

The utility model is achieved in that

Illustrated below in conjunction with accompanying drawing:

Accompanying drawing: peach shell resin sand filter structural representation

This device is made up of variable buckle joint 1, adjusting cap 2, spacer ring 3, sand filtering barrel 4, screen casing 5.

It is changed well to make on the sand anchor architecture basics of existing oil well pump, during manufacturing, only fill one in the screen casing outside at former sand anchor filter when going into the well with the fixed sand filtering barrel of peach shell resin, with oil pipe insert simultaneously oil well pump below, like this, sand grains in the well just can be blocked in outside the pump by sand filtering barrel, reaches the filter sand purpose.

During manufacturing; at first accounting for the outside cover of perforated screen casing at one has one evenly to be mixed with the peach shell that diameter is the 0.5-0.8 millimeter with phenolic resins; the sand filtering barrel 4 of the cylinder type that maintenance is consolidated under 40-50 degree Celsius; on sand filtering barrel top and the bottom spacer ring that shields 3 is housed; on the spacer ring; the bottom respectively has one to regulate cap 2; this cap is attached at above the screen casing 5 by screw thread; regulating the effect of cap can regulate arbitrarily according to different length peach shell resin sand filtering barrel; play fastening sand filtering barrel effect; in the upper and lower of regulating cap one variable buckle joint 1 is arranged respectively; the variable buckle joint can be directly links (drawing among the figure) with screw thread with oil pipe, for crude oil in the well is flow into go in the duct, screen casing center the spy at screen casing on every side by the horizontal 90-degree angle eyelet that evenly to occupy 320-350 diameter be the 9-10 millimeter.

Because the utility model has adopted peach shell resin bonded filter sand tube, have the good penetrability characteristics, and can overcome the flimsy shortcoming of metallic copper gauze net filter sand in the existing technology, fundamentally avoided the interior sand grains of well to enter the difficult point that causes holddown in the pump chamber, also because the processing of the type filter sand is simple, easy to assembly, cost is low, therefore can be widely used in sand control in addition.

Claims

1, a kind of peach shell resin sand filter that is used for rod-pumped well is to have the snapping head of change and screen casing to form; It is characterized in that described screen casing outside is equipped with a filter sand tube with peach shell resin bonded, a spacer ring is respectively arranged at top and bottom at the filter sand tube, the spacer ring upper and lower part respectively has one to regulate cap, this adjusting cap by screwed connection on a screen casing that occupies eyelet, the two ends of regulating cap have one become the snapping head can be directly by screw thread and the oil pipe binding.

2, sand filter according to claim 1, the material that it is characterized in that peach shell resin filter sand tube are to use phenolic resins as base stock, and are mixed with the peach shell that diameter is the 0.5-0.8 millimeter therein, form under 40-50 degree Celsius maintenance is fixed.

3, sand filter according to claim 1 is characterized in that it is 9-10 millimeter eyelet that screen casing occupies 320-350 diameter uniformly by level 90 degree angles on every side.