CN200996283Y

CN200996283Y - Scale scraper of multifunctional well gauge

Info

Publication number: CN200996283Y
Application number: CN 200520104863
Authority: CN
Inventors: 房建民
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-11
Filing date: 2005-08-11
Publication date: 2007-12-26
Anticipated expiration: 2015-08-11

Abstract

The utility model relates to a multifunctional scraping knife for drift well gage tools, and pertains to a well bore processing tool used for underground operations in the petroleum industry. The knife is characterized in that the knife consists of a thick knife and a thin knife; eight knife flywheels are provided at the external side of the main body of the thick knife, and divided into four groups, and the main body of the thick knife is a hollow steel column; the diameters of the knives mounted on the knife flywheels are gradually enlarged from bottom to top, and the edges of the knives are staggered; the blade of the knife flywheels is the front-to-back edge, the edge is arcuate and the middle part along the radial direction is a blunt surface; positioning caulking rings and positioning caulking sleeves are provided between knife flywheels and used to discharge slag; a thick knife upper joint is arranged at the upper end of the main body of the thick knife and used to fasten the four knife flywheels at the upper part and connect the pipes in the oil well; the lower part of the main body of the thick knife is provided with a cap and a lower joint; two groups of cone-shaped knife carriers are arranged at the external side of the main body of the thick knife, and the main body of the thick knife is a hollow steel column; the knife blocks of a combined cutting knife and a combined leveling knife are mounted on the cone-shaped knife carriers respectively; the knife carriers are provided with the tenons having a dovetail section, and the tenons mesh the slots of the combined cutting knife block and the combined leveling knife block; the slots correspond to the cone-shaped knife carriers, and can move along the dovetail-shaped tenons of the knife carriers in the axial direction; a spring holder and a reset spring are sleeved on the lower part of the main body via the threads of the lower joint.

Description

Multi-functional drift size gauge tool scraper

Technical field;

The utility model relates to a kind of petroleum industry, and the wellbore treatments instrument of oilfield downhole operation can utilize underground work pipe string suspending weight to carry out for power; Scrape the down-hole special tool of dirt, drifting, sand washing, printing, integration of operation: multi-functional drift size gauge tool scraper.

Background technology;

After the oil field enters moisture exploitation, because the thermodynamic phase and the chemical incompatibility of water in oil well casing inwall and down-hole pipe string fouling, seriously influence the carrying out of oil well ordinary production and down-hole measure.The tool and method of oilfield treatments oil well casing encrustation is at present: adopt flat junk mill, pears type junk mill or tricone bit, be rotated formula mill dirt with ground rotating disk or down-hole helicoid hydraulic motor, its shortcoming is that speed is slow, the auxiliary work amount is big, expense is high, to the oil well casing serious wear, sometimes also must use the method for chemical solution dirt as ancillary method, the corrosion of aggravation sleeve pipe pollutes to environment.And existing oil well scraper instrument is found in practice: structure design is unreasonable, the supporting imperfection of instrument, blocked up dirt can not strike off, and the defective of cutter type makes blade damage and excessive abrasion easily, key dimension just can not protected, and influences instrument global reliability, safety and application life.

Summary of the invention;

The purpose of this utility model is to provide a kind of oil well fouling of fast, efficiently removing, the operation that makes well wellbore handle is simplified, workload reduces, expense reduces, because two tool profile are cone have and draw the wellbore treatments operation that oblique effect is applicable to inclined shaft, directional well preferably, and have and do not injure sleeve pipe, scrape dirt, drifting, sand washing, printing, prevent the bit freezing function, play the new tool of safety guarantee for underground work: multi-functional drift size gauge tool scraper.The utility model is achieved in that this multi-functional drift size gauge tool scraper is made of thick cutter, thin two assemblies of cutter.The feature of thick cutter is that the cylinder at the steel of hollow is that the outer wall of body pipe fitting is provided with four groups of eight break bars, its cutter is directly served as reasons down upwards step by step, and expansion and break bar are that install wrong sword position, the blade of break bar is the front and back blade, blade is that arc radially is dull face in the middle part, be provided with location spacer ring, positioning spacer between break bar and be used for the location and reserve slagging channel, body pipe fitting upper end be provided with thick cutter top connection be used to compress, fixedly four break bars in top be connected under the well casing string.Be provided with in the body bottom and cap and lower contact, and cap is used to compress, fixing four break bars in bottom.Lower contact is used for and tight also cap prevents to release, the plumbous system of installation is printed sheet and is got trace for the down-hole printing, sand clean out pipe is installed when operation, the sand washing deslagging, the monnolithic case profile of thick cutter is a cone, the work outside dimension is less than thin cutter, be mainly used in the hole condition complexity, borehole wall fouling is blocked up, really up to the mark, the dirtier oil well in shaft bottom is done and is scraped dirt, drifting, sand washing, the small-well-diameter of printing is handled, for thin cutter wellbore treatments is laid a solid foundation, the feature of thin cutter is that the cylinder at the steel of hollow is that the outer wall of body pipe fitting is provided with two groups of tapered knife rests, merge cutting knife, the cutter piece that merges flat cutter is installed in respectively on the tapered knife rest, it is the swallow-tail form tenon that knife rest is provided with section, with merging cutting knife cutter piece, the engagement plug-in mounting that merges flat cutter cutter piece swallow-tail form, merging cutting knife single-piece external form is strip and block, the monnolithic case profile is a cone, its cutter is directly served as reasons down upwards step by step, and expansion and blade are that arrange wrong sword position, merge flat cutter, the single-piece external form is a strip and block, integral body is cylinder, it is strip and block that its blade merges cutting knife single-piece external form, the monnolithic case profile is a cone, its cutter is directly served as reasons down upwards step by step, and expansion and blade are that arrange wrong sword position, merge flat cutter, the single-piece external form is a strip and block, integral body is cylinder, it upwards is the assembly of cutoff edge peace blade that its blade is served as reasons down, and blade is that arrange wrong sword position.Cutoff edge is a strip, blade is arc, radial top is a dull face, flat cutter blade is a rhombus, radial top is a dull face, merging cutting knife cutter piece, merging flat cutter cutter piece internal diameter whole is taper shape and the groove that is provided with swallow-tail form, installs with two groups of tapered knife rests to cooperate, and can move axially along the swallow-tail form tenon of two groups of tapered knife rests.The tapered knife rest of the flat cutter cutter of body pipe fitting top telescopic compound piece, be installed on the body pipe fitting by the top connection screw thread, the top connection double as connects well casing serial connection head and tool rest use down, body pipe fitting bottom is set with the tapered knife rest that merges cutting knife cutter piece, spring pushes away frame, return spring, be installed on the body pipe fitting by the lower contact screw thread, when the lower contact compression retracteding position spring, promoting spring pushes away frame and makes and merge cutting knife cutter piece and take along the cutter that tapered knife rest swallow-tail form tenon moves to operating position, body pipe fitting bottom on axially, the cutter of body pipe fitting is sat the axially extending bore that is provided with device return push rod, the spring thrust that the return push rod will merge cutting knife cutter piece reaches and merges flat cutter cutter piece and make it move to the operating position of top connection tool rest on axially along tapered knife rest swallow-tail form tenon, the maximum functional outside dimension of thin cutter is a standard drifting size, it is lighter to be mainly used in borehole wall fouling, the oil well that the shaft bottom is cleaner is done and is scraped dirt, drifting, sand washing, conventional treatment, and can use separately.Thin cutter blade distributes, and slightly cutter is intensive, the feasible pit shaft of handling of the rhombus blade of flat cutter is neatly smooth in addition can carry out step down-hole measure smoothly, because thin cutter is provided with tapered cutter frame structure, when being subjected to the external force opposite with the return spring bearing force, merge cutting knife cutter piece, it is motionless to merge flat cutter cutter piece position, tapered knife rest and swallow-tail form tenon move up, make the cutter that merges cutting knife cutter piece and the flat cutter cutter piece of merging directly dwindle, stop the jam of cutter piece and oil well casing inwall, ward off the generation of exempting from lock of tool drilling, the utility model is provided with thick cutter not only increases new function, also enlarged the scope of application, two instrument blade radial top are dull face and can not injure oil well casing when work, prolong the application life of oil well.

Description of drawings;

Fig. 1, multi-functional drift size gauge tool scraper, thick cutter overall structure figure

Fig. 2, multi-functional drift size gauge tool scraper, thin cutter overall structure figure

Fig. 3, multi-functional drift size gauge tool scraper, thick cutter break bar detail structure chart

Fig. 4, multi-functional drift size gauge tool scraper, the thin tapered knife rest detail structure chart of cutter

Fig. 5, multi-functional drift size gauge tool scraper, thin cutter merges flat cutter detail structure chart

Fig. 6, multi-functional drift size gauge tool scraper, thin cutter merges the cutting knife detail structure chart

The specific embodiment;

1. top connections among the thick cutter overall structure of Fig. 1 figure, 2. positioning spacer, 3. break bar, 4. location spacer ring, 5. body pipe fitting, 6. and cap, 7. lower contact, 8. sand clean out pipe

It is fixedly connected by top connection (1) that two groups of break bars (3) positioning spacers (2) location spacer rings (4) are set in body pipe fitting top (5) among Fig. 1.Two groups of break bars (3) positioning spacers (2) location spacer rings (4) are set in body pipe fitting bottom (5) by also cap (6) is fixing in addition.Sand clean out pipe (8) is sleeved in the endoporus of body pipe fitting (5), can move axially, and fixes by lower contact (7) is spacing, and lower contact (7) lower surface can be installed plumbous system printing sheet and be got trace for the down-hole printing.

9. top connections among the thin cutter overall structure of Fig. 2 figure 10. merge flat cutter, 11. return push rods, and 12. tapered knife rests, 13. body pipe fittings, 14. merge cutting knife, and 15. springs push away frame, 16. return springs, 17. lower contacts.

The cutter piece dovetail groove engagement of the flat cutter of the merging among Fig. 2 (10) is inserted on the swallow-tail form tenon of tapered knife rest (12), the cutter piece can move axially, and leave certain stroke and move axially for the cutter piece and be used for undergauge, tapered knife rest (12) be sleeved on hollow steel lean on the outer wall that body is body pipe fitting (13), use by the tool rest that top connection (9) is connected and fixed and double as merges flat cutter (10), the dovetail groove engagement that merges cutting knife (14) cutter piece is plugged on tapered knife rest (12) the swallow-tail form tenon, the cutter piece can move axially, tapered knife rest (12) be sleeved on hollow steel lean on the outer wall that body is body pipe fitting (13), and pocketed springs pushes away frame (15) successively, return spring (16), compress by lower contact (17) at last, return spring (16) is connected and fixed with body pipe fitting (13), compressed return spring (16) power will promote spring and push away frame (15) and merge cutting knife (14) and reach return push rod (11) in body pipe fitting (13) axially extending bore and reach and merge flat cutter (10) and make that merging cutting knife (14) merges flat cutter (10) and move to the operating position on axially and reach the maximum outside diameter size, when running into return spring (16) bearing force opposite effect power, merge cutting knife (14) and merge flat cutter (10), to move down certain stroke along tapered knife rest (12), compression retracteding position spring (16) and undergauge reaches the anti-sticking purpose, by return spring, the effect of power resets after external force is removed.

The thick cutter break bar of Fig. 3 detail structure chart 3. break bars, 18. sword faces, 19 front edges, 20 dull faces, 21 rear edges.

Among Fig. 3, have on the outer wall of break bar (3) and radially divide being characterized as of serrated knife sword (18) blade (18), front edge (19) is the arcuate blade face with the axial section of rear edge (21), and the axial middle part of blade (18) (20) is a dull face.

The tapered knife rest detail structure chart 12. taper knife rests of the thin cutter of Fig. 4,22. swallow-tail form tenons.

Swallow-tail form tenon (22) is used to mesh plug-in mounting and merges cutting knife (14) and merge flat cutter (10) and leave certain stroke and move axially for the cutter piece and be used for undergauge among Fig. 4.

The thin cutter of Fig. 5 merges flat cutter detail structure chart 10. and merges flat cutter, 23. flat cutter rear edges, and 24. cutting knife front edges, 25. dovetail grooves,

Among Fig. 5, the blade that merges flat cutter (10) is made up of cutting knife front edge (24) and flat cutter rear edge (23) respectively, the tooth shape of cutting knife front edge (24) is axial bar shaped, flat cutter rear edge (23) tooth shape is a dull face for the rhombus radial top, it is block for dividing on circumference to merge flat cutter (10), it is cylinder type that the groove (25) of the swallow-tail form that is provided with at inwall and taper knife rest (12) swallow-tail form tenon (22) plug-in mounting, thin cutter merge the thin portion of flat cutter (10) structural entity.

The thin cutter of Fig. 6 merges cutting knife detail structure chart 14. and merges cutting knife, 26 cutting knife blades, 27. blades, 28. secondary swords.

Merge its cutting knife blade (26) of cutting knife (14) among Fig. 6, major cutting edge (27) be the arcuate blade face, secondary sword (28) is the inclined-plane, it is block for dividing on circumference to merge cutting knife (14), when running into when return spring (16) the bearing force opposite effect power, thin cutter merges cutting knife (14) will move down certain stroke along tapered knife rest (12), compression retracteding position spring (16) and undergauge, merging the thin portion of cutting knife (14) structural entity is cone, so that merge the purpose that the blade (26) of cutting knife (14) cuts step by step.

Claims

1. the utility model relates to a kind of multi-functional drift size gauge tool scraper, it is the wellbore treatments instrument of petroleum industry oilfield downhole operation, this instrument is characterised in that: it is by thick cutter, two toolboxs of thin cutter constitute, thick cutter is that the outer wall of body pipe fitting is provided with four groups of eight break bars at the cylinder of the steel of hollow, its cutter is directly served as reasons down upwards step by step, and expansion and break bar are that install wrong sword position, the blade of break bar is the front and back blade, blade is that camber radially is dull face in the middle part, be provided with the location spacer ring between break bar, positioning spacer is used for the location and reserves slagging channel, body pipe fitting upper end be provided with thick cutter top connection be used to be fixed four break bars in top and be connected under the well casing string, be provided with and cap and lower contact in the body bottom, thin cutter is that the cylinder at the steel of hollow is that the outer wall of body pipe fitting is provided with two groups of tapered knife rests, merge cutting knife, the cutter piece that merges flat cutter is installed in respectively on the tapered knife rest, it is swallow-tail form tenon and merging cutting knife cutter piece that knife rest is provided with section, the engagement plug-in mounting that merges flat cutter cutter piece, cooperate also and can move axially with two groups of tapered knife rests installations along the swallow-tail form tenon of two groups of tapered knife rests, body pipe fitting bottom is set with spring and pushes away frame, return spring is installed on the body pipe fitting by the lower contact screw thread.

2, according to the described multi-functional drift size gauge tool scraper of claim 1., it is characterized in that: the break bar of thick cutter be assemblied in for grouping hollow steel lean on the outer wall that body is the body pipe fitting, be provided with location spacer ring, positioning spacer between break bar, and break bar is that install wrong sword position, thick cutter overall structure appearance profile is cone.

3, according to the described multi-functional drift size gauge tool scraper of claim 1., it is characterized in that: thick cutter outer wall is provided with the blade that radially divides tooth, and front cutting edge and rear knife edge are arranged, and blade is a camber at axial section, and radially the middle part is a dull face.

4, according to the described multi-functional drift size gauge tool scraper of claim 1., it is characterized in that: thin cutter is made of merging cutting knife, two groups of cutters of the flat cutter of merging, merging cutting knife, merging flat cutter radially is being that branch is block, its inwall is provided with dovetail groove, dovetail groove is used for engagement and is inserted into the swallow-tail form tenon, the merging cutting knife overall structure appearance profile of thin cutter is a cone, and merging flat cutter overall structure appearance profile is cylinder.