CN2345688Y

CN2345688Y - Underground sand-wash wax scraper

Info

Publication number: CN2345688Y
Application number: CN 98215986
Authority: CN
Inventors: 张顺; 吴俊海; 宋立奎; 马英建
Original assignee: NO 7 OIL PRODUCTION FIELD DAQING PETROLEUM ADMINISTRATION
Current assignee: NO 7 OIL PRODUCTION FIELD DAQING PETROLEUM ADMINISTRATION
Priority date: 1998-06-30
Filing date: 1998-06-30
Publication date: 1999-10-27
Anticipated expiration: 2008-06-30

Abstract

The utility model relates to a sand rinsing and paraffin scraper for an oil well. Both paraffin scraping and sand rinsing at the well bottom can be proceeded on a once pipe pole. A single flow ball 1 is seated on a center sand rinsing pipe 13 of the sand rinsing and paraffin scraper, and a walking beam 7 is positioned on the outer circle during the process of dropping with an oil pipe pole. A paraffin cutter 8 can scrape the wax on the inner wall of a sleeve pipe. When the sand rinsing and paraffin scraper goes down to the well bottom, pouring and flushing fluid at the well mouth causes a packing ring 3 to move downwards via a circumfluence road 14. When a wall opening 4 is opened, the liquid enters the sand rinsing pipe 13 in which the liquid can proceed rinsing sands. Simultaneously, the paraffin scraper gathers inwards to make a loop smooth, at this point a spring 11 is pressed. When sand rinsing finishes and injecting stops, the spring 11 is released, each component on the sand rinsing and paraffin scraper is reset, and the paraffin scraper is restored on the outer circle again. The utility model can proceed with paraffin scraping again in the process of lifting with the pipe pole.

Description

Down-hole sand washing paraffin scraper

The utility model relates to the comprehensive down-hole sand washing paraffin scraper of the sand washing of shaft bottom, oil field, tube wall paraffin cutting.

Oilfield is in the long-term production process, owing to contain wax in the oil and carry silt particle, wherein wax is tied on oil pipe and casing wall, and more knot is thicker, influences the production and the underground work of oil well, needs regular ground wax removal.Silt particle entrained in fuel-displaced process is sunken to the shaft bottom, also needs to carry out the interim work of removing of dashing, to guarantee the ordinary production and the underground work of oil well.At present, the sand washing, the paraffin cutting that are carried out of oil well operation is to carry out in two procedures; Connect sand clean out pipe during sand washing in tubing string bottom, the port of export is as like nib, increasing the pressure and the flow velocity of liquid stream, the silt particle in shaft bottom is dashed, and with being carried into ground, sand washing finishes and trips out sand clean out pipe.During paraffin cutting more in addition lower bottom part connect the tubing string of paraffin scraper, in the process of going into the well, can wipe wax layer and other attachment tied on internal surface of sleeve pipe off, bring to ground by injecting high temperature water solution.Because two kinds of operation branch two procedures are carried out, thereby time-consuming, effort, cost increased.

The purpose of this utility model is to avoid above-mentioned problems of the prior art, and a kind of down-hole sand washing paraffin scraper that can carry out sand washing and paraffin cutting on one tubing string is provided.

The purpose of this utility model can reach by the following technical programs: adopt long sand clean out pipe, the two ends of this pipe be with the upper and lower joint that is threaded and on sat up straight the single current spheroid.In this top connection is threaded, form the axial rings runner on the heavy wall section, put plunger ring and starting taper tube in the ring cavity under the circulation road.Several axial uniform banking stops of one are arranged on the ring end face under plunger ring, and the wall mouth is being arranged on sand clean out pipe under the plunger ring.Described starting taper tube bottom is a taper sheath, is set to from lower taper and has corresponding with above-mentioned banking stop axially uniform saturating groove under the cylindrical shell upper surface, and banking stop can enter in the corresponding groove, and the starting taper tube is fixed on the sand clean out pipe.In the ring cavity that between lower contact and sand clean out pipe, forms in be with spring on the sand clean out pipe, week upwards is fixed with the starting taper tube on the corresponding individual uniform triangular piece of saturating groove and be with the taper sliding cylinder again.This taper sliding cylinder upper end be a tapered cap, and the footpath, the end of tapered cap is greater than the cylindrical shell footpath, has corresponding individual axial uniform saturating groove with triangular piece on from tapered cap to the cylindrical shell lower surface, and triangular piece can embed in the corresponding groove.Between the upper and lower joint at the external formation one segment body outer groove of sand clean out pipe, be equipped with in this annular groove with above-mentioned taper sliding cylinder on the axial equal walking beam of portion of corresponding of saturating groove, on the upper end embedding top connection of walking beam and the starting taper tube between the saturating groove in; In the lower end of walking beam embeds on lower contact and the taper sliding cylinder thoroughly between the groove; And be fixed with the paraffin scraper that constitutes a certain angle with walking beam at the middle part of each walking beam, the end forms the toroidal paraffin scraper.

Above-mentioned banking stop, walking beam, triangular piece and saturating groove respectively are 8, import saturating groove on the starting taper tube in order to make banking stop in moving process, and the banking stop lower end forms guiding incline; Angle can be 15～20 degree between paraffin scraper and the walking beam two axial lines; Wherein paraffin scraper is the bar shaped cell body, and bottom land is a cambered surface, and the both sides groove face slopes inwardly.By such scheme as can be known, paraffin scraper is mounted on the sand clean out pipe, forms a short circuit and is connected on the tubing string of going into the well, and removes in the process paraffin scraper away from the centre punch sandpipe at tubing string, the external diameter of paraffin scraper can carry out paraffin cutting near the inwall of sleeve pipe, and hot-water flooding then dissolves and washes away the outflow well head.Tubing string is down to the shaft bottom during sand washing, inject flushing liquor, because single current spheroid 1 is put in centre punch sandpipe 13 upper ends, the hydraulic drive piston ring is exercised its upper limit bit slice 5 for 3 times and is entered on the starting taper tube 6 in the saturating groove, expose wall mouth 4, flushing liquor enters sand clean out pipe 13 by circulation road 14, wall mouth 4 and can dash with flushing liquor shaft bottom sand post and be carried into ground, realizes that a tubing string can carry out the twice operation, thus the purpose of design of finishing.

The utility model is compared with above-mentioned present technology can have following advantage: owing to connect the upper and lower joint that can be connected with tubing string outside the sand clean out pipe two ends, in exposed annular groove between the upper and lower joint, form the paraffin scraper of expansion, rising with tubing string, can carry out the paraffin cutting operation in the process down.Tubing string can carry out the sand washing operation again down to the shaft bottom, realizes that a tubing string can carry out paraffin cutting and sand washing operation, reduces the rising an of tubing string, down, saves time, laborsaving, cuts down expenses favourable production.

Accompanying drawing the 1, the 2nd, the working state figure when the utility model carries out paraffin cutting and sand washing;

Accompanying drawing the 3, the 4th, the master of walking beam 7, vertical view on Fig. 1;

Accompanying drawing the 5, the 6th, paraffin scraper 8 is installed in master, the vertical view on the walking beam 7 on Fig. 1;

Accompanying drawing the 7, the 8th, Fig. 1 upper prop plug ring 3 and on main, the vertical views of banking stop 5;

Accompanying drawing the 9, the 10th, master, the vertical view of the upper conical sliding cylinder 9 of Fig. 1;

Accompanying drawing the 11, the 12nd, the master of starting taper tube 6, vertical view on Fig. 1.

Below in conjunction with accompanying drawing will the utility model is described in further detail:

Shown in accompanying drawing 1,2, adopt long sand clean out pipe 13, be with the upper and lower joint (2,12) and the upper end that are threaded at the two ends of sand clean out pipe 13 and put single current spheroid 1; The specification of wherein upper and lower joint (2,12) is identical with the specification of tubing string top connection, conveniently is connected on the tubing string.Connection of thread forms thicker inner wall section and is shaped on circulation road 14 in the top connection 2, form ring cavity under the circulation road 14, in this ring cavity, put plunger ring 3 and starting taper tube 6, several axial uniform banking stops 5 that one is arranged on 3 times rings of plunger ring end face, shown in Fig. 7,8, wall mouth 4 is being arranged on sand clean out pipe 13 under the plunger ring 3.Shown in Figure 11,12, starting taper tube 6 bottoms are taper sheath, are set to from lower taper to have under the cylindrical shell upper surface and 5 corresponding axial uniform saturating grooves 16 of banking stop, and starting taper tube 6 is fixed on the sand clean out pipe 13; The formation of saturating groove 16 can become from sawing on the tapered sleeve end face of bottom, and sawing is under the cylindrical shell upper surface.Between lower contact 12 and sand clean out pipe 13, ring cavity is arranged also, in be with on the sand clean out pipe 13 upwards are fixed with in spring 11, week with starting taper tube 6 on saturating groove 16 corresponding individual triangular pieces 10 and be with taper sliding cylinder 9 again.Shown in Fig. 9,10, taper sliding cylinder 9 upper ends are tapered cap, and footpath, the end of tapered cap is greater than the cylindrical shell footpath, have and 10 corresponding axial uniform saturating grooves 17 of triangular piece on from tapered cap to the cylindrical shell lower surface, 17 li of triangular piece 10 embedded grooves, the formation of saturating groove 17 is as saturating groove 16.Form a segment body outer groove between the upper and lower joint (2,12), in this annular groove perpendicular have with taper sliding cylinder 9 on the axial uniform walking beams 7 of 17 corresponding of saturating grooves, the upper end of walking beam 7 embeds on top connection 2 and the starting taper tube 6 thoroughly 16 li of grooves; In the lower end of walking beam 7 embeds on lower contact 12 and the taper sliding cylinder 9 thoroughly between the groove 17.Be fixed with the paraffin scraper 8 that constitutes a certain angle with walking beam at the middle part of each walking beam 7, form this paraffin scraper, the end of paraffin scraper outwards diffuses to form toroidal.

Above-mentioned banking stop 5, walking beam 7, triangular piece 10 and saturating groove (16,17) respectively are 8, and the lower end of each banking stop 5 should form inclined plane 15, conveniently enters 16 li of grooves; Saturating groove (16,17) is a step slot wide at the top and narrow at the bottom.During installation, top connection 2 is coupled to earlier on the sand clean out pipe 13, up is inserted in piston ring 3, starting taper tube 6 by sand clean out pipe 13 lower ends, loads onto walking beam 7, wherein the upper end of the lower end of piston ring 3 upper limit bit slices 5 and walking beam 7 all embeds 16 li of saturating grooves corresponding on the starting taper tube 6, then fixed triangle shape sheet 10; Up be inserted in taper sliding cylinder 9 and spring 11 again by the sand clean out pipe lower end, taper sliding cylinder 9 is supported by spring 11 by triangular piece on the sand clean out pipe 10, make walking beam 7 lower ends embed 17 li of saturating grooves corresponding on the tube 9 simultaneously, join lower contact 12 at last and constitute the sand washing paraffin scraper, before going into the well with tubing string spheroid 1 is dropped into.In the process of going into the well, walking beam 7 is on the outer ring, makes the lower end of paraffin scraper form maximum outside diameter, contacts with tube inner wall and can carry out paraffin cutting.At the bottom of the lower going-into-well during sand washing, inject flushing liquor by well head, because spheroid 1 seals the sand clean out pipe central through hole, 14 promotion piston rings 3 make its upper limit bit slice 5 saturating groove on starting taper tube 6 descending to liquid through the circulation road, piston ring under wall mouth 4, so liquid enter sand clean out pipe through wall mouth 4 can be to the shaft bottom sand washing.In the descending process of piston ring, because the banking stop broad, the lower end has the inclined-plane again, walking beam is clamp-oned inner ring along saturating groove close up on sand clean out pipe, as shown in Figure 2, the external diameter of paraffin scraper and joint external diameter are close, flushing liquor is without hindrance by returning on the annular space, can carry up the sand that has dashed.Inwardly close up at walking beam 7 and also to produce in the process,, can force sliding cylinder 9 to move down, make spring 11 pressurizeds because the walking beam middle part is thicker to bottom offset.When sand washing finishes, stop fluid injection, spring is released, and spring is resetted with upper-part, and walking beam 7 is positioned at the outer ring, the paraffin scraper state of going into the well that also resets, tubing string can carry out paraffin cutting again last carrying in the process.

Claims

1, a kind of oil field well down-hole sand washing paraffin scraper that is used for, it is gone up at sand clean out pipe (13) and forms, and it is characterized in that: be with the upper and lower joint (2,12) and the upper end that are threaded at sand clean out pipe (13) two ends and put single current spheroid (1);

A, in being threaded, top connection (2) forms axial rings runner (14) on the heavy wall section, put plunger ring (3) and starting taper tube (6) in the ring cavity under the circulation road (14), on the ring end face several axial uniform banking stops (5) of one are arranged down at plunger ring (3), and wall mouth (4) is being arranged on sand clean out pipe (13) under the plunger ring (3);

B, starting taper tube (6) bottom are taper sheath, are set to from lower taper and have corresponding with banking stop (5) axially uniform saturating groove (16) under the cylindrical shell upper surface, and starting taper tube (6) is fixed on the sand clean out pipe (13);

On sand clean out pipe (13), be with spring (11) in c, the ring cavity that between lower contact (12) and sand clean out pipe (13), forms, week upwards is fixed with goes up the corresponding individual uniform triangular piece (10) of saturating groove (16) and be with taper sliding cylinder (9) again with starting taper tube (6);

D, taper sliding cylinder (9) upper end be a tapered cap, and the footpath, the end of tapered cap is greater than the cylindrical shell footpath, has corresponding individual axial uniform saturating groove (17) with triangular piece (10), triangular piece (10) embedded groove (17) lining on from tapered cap to the cylindrical shell lower surface:

Form a segment body outer groove between e, the upper and lower joint (2,12), in this annular groove perpendicular have with taper sliding cylinder (9) go up axially uniform walking beam (7) of corresponding of saturating groove (17), the upper end of walking beam (7) embed top connection (2) and starting taper tube (6) upward between the saturating groove (16) in; In the lower end embedding lower contact (12) of walking beam (7) and taper sliding cylinder (9) are gone up between the saturating groove (17); And be fixed with the paraffin scraper (8) that constitutes a certain angle with walking beam at the middle part of each walking beam (7).

2, sand washing paraffin scraper according to claim 1 is characterized in that: banking stop (5), walking beam (7), triangular piece (10) and saturating groove (16,17) respectively are 8, and wherein the lower end of each banking stop (5) forms guiding incline (15).

3, sand washing paraffin scraper according to claim 1 is characterized in that: angle can be 15～20 degree between paraffin scraper (8) and walking beam (7) two axial lines; Wherein paraffin scraper (8) is the bar shaped cell body, and bottom land is a cambered surface, and the both sides groove face slopes inwardly.

4, sand washing paraffin scraper according to claim 1 and 2 is characterized in that: saturating groove (16,17) is a step trough wide at the top and narrow at the bottom.