CN102121371A

CN102121371A - Underground solid-liquid and oil-water separating device for reciprocating producing well

Info

Publication number: CN102121371A
Application number: CN2010106237385A
Authority: CN
Inventors: 于华飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-26
Filing date: 2010-12-26
Publication date: 2011-07-13

Abstract

The invention discloses an underground solid-liquid and oil-water separating device for a reciprocating producing well. The device comprises a barrel-shaped oil-water separating cavity and an annular cavity, wherein the annular cavity surrounds the outside of the oil-water separating cavity; the bottom of the annular cavity is sealed with the outer wall of the oil-water separating cavity through a hard plate; the space between the oil-water separating cavity and the annular cavity is filled with a hard annular piston; the annular piston moves along the longitudinal and axial directions of the oil-water separating cavity in a reciprocating way under the action of external force; solid-liquid separation is completed by a one-way conduction valve at the bottom of the oil-water separating cavity and a netlike filter membrane; meanwhile, oil-water separation is completed in well liquid by using an oil-water separating film of the oil-water separating cavity and the one-way conduction valve communicated with the outer wall of the annular cavity; and water and oil are conveyed to special elevating and injecting systems respectively. Therefore, the aim of completing solid-liquid separation and oil-water separation is fulfilled.

Description

Reciprocating type producing well down-hole solid-liquid, oily-water seperating equipment

Affiliated technical field

The present invention relates to a kind of producing well down-hole solid-liquid, oily-water seperating equipment of being used for, especially in most widely used reciprocating beam-pumping unit running, realize solid-liquid, the water-oil separating of down-hole small space.

Background technology

Current, lifting device known, that use in the oil field, all be directly well liquid to be given rise to ground to carry out oil and the separating of non-oil component again, contain a large amount of non-oil components in the well liquid, (week is beautiful jade always to calculate [1] according to moisture content 83.4%, " Chinese oil field development present situation and Analysis on Prospect ", " oil exploration and exploitation " magazine in February, 2004, data in the 84th page table 1), give rise in the well liquid on ground, have only about 10% to be crude oil, other all are invalid components, do not comprise also that here ground carries out the cost input of oil and the separation process of waste oil composition.The cost of serious waste lifting and even surface separation.

Summary of the invention

In order to overcome the serious waste of oil well lifting cost and even surface separation process, the invention provides a kind of device that solid-liquid, water-oil separating are carried out in the producing well down-hole that is used for, can realize solid-liquid, water-oil separating in the down-hole, the well liquid that causes oil well lifting ground that process gives rise to all is crude oil more than 90%.This device not only can be implemented in the solid-liquid of down-hole, the separation of profit, can also deliver to the solid of separating in the pocket that the down-hole is specifically designed to the storage solids, and water sent into be specifically designed in the water filling device of oil-bearing stratum flooding, is used for the oil reservoir re-injection.

The technical solution adopted for the present invention to solve the technical problems is: the water-oil separating chamber that utilizes a drum, in bottom, water-oil separating chamber, be mounted on bottom, water-oil separating chamber reticular membrane with a unidirectional conducting valve that can only be liquid enters the water-oil separating chamber and carry out Separation of Solid and Liquid, through unidirectional conducting valve and reticular membrane, well liquid behind the filtering solid matter can enter the water-oil separating chamber, can not flow out the water-oil separating chamber.Water-oil separating chamber cylindrical chamber wall is by hating oily hydrophilic filter membrane attached on steel circle, the netted chamber wall.Outside the water-oil separating chamber, the cavity that is an annular is trapped among outside the water-oil separating chamber, the annular housing outer wall is a steel drum, the bottom seals with hard plate with the water-oil separating cavity outer wall, and be connected with unidirectional conducting valve by the annular housing outer wall, this unidirectional conducting valve only allows liquid to annular housing outer wall flows outside.The annular housing inwall is exactly the outer wall in water-oil separating chamber.Forming in the annular housing by water-oil separating cavity outer wall and annular housing outer wall, the annular piston identical shaped with the annular chamber intracorporeal space is installed, the Y that annular piston can prolong annular housing moves, Y by annular piston moves, can be from oil well well liquid, by Separation of Solid and Liquid film and the unidirectional conducting valve that can only enter the water-oil separating chamber, finish Separation of Solid and Liquid.The oily hydrophylic filter membranes of hating by water-oil separating chamber and water-oil separating cavity outer wall again, oil is stayed in the water-oil separating chamber, then, Y counter motion by annular piston, the water of staying in the annular housing, by be linked at the annular housing outer wall, can only be to annular housing outer wall foreign side the one-way cock to conducting, it is outside that water is discharged to this device.Reach the purpose of finishing solid-liquid, water-oil separating in the down-hole.

The invention has the beneficial effects as follows can be in the down-hole of the producing well in oil field, finish solid-liquid, water-oil separating, it all is crude oil that the non-oil component that the oil well of making over gives rise to ground 83.4% becomes more than 90%, lifting efficiency improve to improve more than 5 times, and 83.4% the non-oil component that does not also include the ground oil water separation process here becomes the efficient raising of the crude oil 90% or more.

Description of drawings

Be that son further specifies of the present invention in conjunction with the accompanying drawings and embodiments below.

Fig. 1 is down-hole solid-liquid, oily-water seperating equipment outward appearance schematic diagram; Fig. 2 is down-hole solid-liquid, oily-water seperating equipment bottom outward appearance schematic diagram; Fig. 3 is a water-oil separating cavity outer wall structure chart.

Fig. 1 is a structure principle chart of the present invention.Among Fig. 11 is the outside drawing of producing well down-hole solid-liquid, oily-water seperating equipment annular housing, is the airtight cylinder of steel, and 2 are mounted in the inside and outside wall of annular piston in the annular housing, the outer wall in 3 water-oil separating chambeies.The 4th, be connected the annular housing outer wall, with annular housing together with, can only be outside the annular housing outer wall the unidirectional conducting valve of direction trickle.The 5th, be connected bottom, water-oil separating chamber, the outside unidirectional conducting valve inner, that can only flow to liquid to the inside, water-oil separating chamber in water-oil separating chamber.

Fig. 2 is down-hole solid-liquid, an oily-water seperating equipment bottom outward appearance schematic diagram, and 1 among Fig. 2 is reticular membrane, can allow liquid to flow through, and the design of the width of mesh by reticular membrane reaches the purpose of filtering solid.Among Fig. 22 is the unidirectional conducting valves that are used for the unidirectional inflow water-oil separating of the well liquid chamber of solid-liquid, profit mixing.

Fig. 3 is a water-oil separating cavity outer wall structure chart.Among Fig. 31 is attached to the water-oil separating film on the water-oil separating cavity outer wall, this film has the inner surface of hating oil hydrophilic, by design to the mesh of film, can reach the purpose of water-oil separating, and, since this film hate the hydrophilic inner surface of oil, cause the crude oil of filtration can not stick to the inner surface in water-oil separating chamber.Can not influence the continuous firing of water-oil separating film.

The specific embodiment

In Fig. 1, with external force annular piston 2 is pulled upwardly, under the effect of the unidirectional conducting valve 4 bottom the water-oil separating chamber, the well liquid in the oil well enters the water-oil separating chamber by the Separation of Solid and Liquid reticular membrane 1 among Fig. 2, and finishes the Separation of Solid and Liquid of well liquid.Finish Separation of Solid and Liquid, enter the well liquid in water-oil separating chamber, simultaneously, under the effect that annular piston 2 is pulled upwardly in Fig. 1, well liquid in the water-oil separating chamber, under the filtration by water-oil separating cavity outer wall 3, crude oil is stayed in the water-oil separating chamber, and water then is drawn into by annular piston, because of annular piston is pulled upwardly formed annular space.When the external force for the treatment of annular piston is depressed, remain in water in the annular space just by by unidirectional conducting valve 4 downwards, flowing to has the moisture device outside.Finish down-hole solid-liquid, water-oil separating.The oil field just of moving up and down of annular piston the motion mode of a large amount of oil pumpers that use.

Claims

1. down-hole solid-liquid that is used for oil well, oily-water seperating equipment, netted at cylindrical cavity, on the hard outer wall, adhere to and hate oily hydrophylic filter membranes, the bottom is equipped with Separation of Solid and Liquid reticular membrane and cavity external communications, the Separation of Solid and Liquid reticular membrane connects can only allow well liquid enter the unidirectional conducting valve of cavity, and quilt annular outside the water-oil separating chamber, tubbiness hard cavity centers on, the annular housing bottom links to each other with the water-oil separating cavity outer wall and seals, annular housing hard outer wall is equipped with can be to annular housing outflow the unidirectional conducting valve of liquid, in the annular space that forms, the annular piston identical with the annular space shape is installed, this piston can move up and down along the annular space Y, it is characterized in that: annular piston under external force, when the annular space Y moves upward, well liquid is finished Separation of Solid and Liquid by the unidirectional conducting valve and the reticular membrane of bottom, water-oil separating chamber, simultaneously, under water-oil separating cavity outer wall water-oil separating membrane interaction, finish water-oil separating, oil is stayed in the water-oil separating chamber, water is being pulled upwardly because of annular piston in the formed annular space, when annular piston under external force, when in annular space, doing Y and moving downward, water in the extruding annular space, by being installed in the coconnected unidirectional conducting valve of annular housing outer wall, outside the effluent oil water separation device.

2. down-hole solid-liquid, the oily-water seperating equipment of oil well according to claim 1, upper end, water-oil separating chamber are lower than the annular housing upper end that centers on, and annular piston is up must not surpass upper end, water-oil separating chamber.

3. down-hole solid-liquid, the oily-water seperating equipment of oil well according to claim 1 are connected and apply the parts of external force with annular piston, should get around upper port position, water-oil separating chamber.

4. down-hole solid-liquid, the oily-water seperating equipment of oil well according to claim 1 link to each other with the oily device of getting of lifting mechanism on the water-oil separating chamber, directly the crude oil in the water-oil separating chamber are given rise to ground.

5. down-hole solid-liquid, the oily-water seperating equipment of oil well according to claim 1, netted separation filter membrane of solid-liquid and hard plate mesh skeleton close adhesion.

6. down-hole solid-liquid, the oily-water seperating equipment of oil well according to claim 1, the bonding and annular housing outer wall of water-oil separating film and annular housing outer wall secret is netted, and the liquid of being convenient to water-oil separating flows through.