CN218780312U

CN218780312U - Hole-drawing device for drifting of horizontal well in hard formation

Info

Publication number: CN218780312U
Application number: CN202222804052.7U
Authority: CN
Inventors: 秦春; 刘纯仁; 程智勇
Original assignee: Sinopec Oilfield Service Corp; Sinopec East China Petroleum Engineering Corp
Current assignee: Sinopec Oilfield Service Corp; Sinopec East China Petroleum Engineering Corp
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-03-31
Anticipated expiration: 2032-10-24

Abstract

The utility model discloses a hard formation horizontal well drifting is with drawing hole ware, the test paper box comprises a cylinder body, be equipped with the cylinder centre bore along the cylinder axis, the upper end of cylinder is equipped with toper female thread, the lower extreme of cylinder is equipped with toper male thread, cylinder middle section outer wall evenly is equipped with a plurality of spiral blades, it has inlayed many carbide posts respectively on the arris of rightting of each spiral blade, the upper and lower both ends of spiral blade link to each other with the cylinder through the tapering respectively, be equipped with spiral overflow groove between the adjacent spiral blade respectively, the upper portion in each spiral overflow groove is equipped with the last jet orifice that upwards sprays respectively, many triangular cutting teeth have been inlayed respectively to each spiral blade and the domatic cutting face of tapering, on, many toper cutting teeth have been inlayed respectively to the border of the domatic dorsad cutting face of tapering down. The hole scratching device for the drifting can repair well walls of shrinkage, steps and collapsed well sections in a horizontal well in a hard formation, improves the well cleaning effect, improves the well body quality, shortens the drifting operation time, and reduces the risks of well drilling and well completion operation.

Description

Hole-drawing device for drifting of horizontal well in hard formation

Technical Field

The utility model relates to a reaming instrument is used in the well drilling, especially relates to a hard formation horizontal well drifting is with reaming ware, belongs to downhole reaming ware technical field.

Background

Many horizontal wells can not be normally tripped by a hoisting block directly during tripping, and the well shaft can be tripped out only by adopting a back reaming mode. Rock debris generated by the back reaming can be accumulated in big dog legs or well sections in the twisting direction in the upward returning process, and the phenomena of pump building and top drive stopping are easy to occur. At present, a drilling tool combination of a roller bit and a drilling tool stabilizer is generally adopted for drifting, the wall of a well is scraped by the roller bit and a stabilizer blade gauge protection block, the drifting is performed to the bottom by means of high-rotation-speed rotation of the drilling tool and large-discharge circulation of drilling fluid, rock debris at the bottom of the well is flushed away from the bottom of the well, a rock debris bed and a thick mud cake in the well are difficult to damage in the drifting process, and the rock debris still can sink gradually along with reduction of impact energy of the drilling fluid after being transported upwards, and the rock debris bed is formed at a position away from the bottom of the well again. The drilling tool stabilizer who uses is mostly straight wing of a knife or spiral wing of a knife, and wing width and length overlength lead to great with the wall of a well area of contact, have increased frictional resistance. And the tooth arrangement of the drilling tool stabilizer is limited, the drilling tool stabilizer has no capability of treating underground collapsed objects, once the well wall collapses, the fallen blocks fall on the stabilizer, the cutting and crushing cannot be carried out, the stabilizer clamping accident is very easy to occur, the cuttings are continuously accumulated to block the cuttings discharge groove, the pump is very easy to be blocked, and the complex treatment difficulty is aggravated.

At present, in the conventional drilling-while-drilling hole-drawing device, although the cutting teeth of the active cutting units on the cutter blades are optimally distributed, the layout angle of the cutting teeth is adjusted, and high-strength hard alloy tooth columns are also adopted to enhance the wear resistance, the effect is not ideal in the using process, the design of the taper angle of the cutter blades of the drilling-while-drilling hole-drawing device is large through field application discovery, when a large step exists on a well wall, the taper angle of the hole-drawing device firstly contacts with the step of the well wall, the large taper angle increases the overpull force in the drilling-out process, and the drilling tool is easy to have a self-locking phenomenon. In order to increase the stability between the hole-cutting device and the well wall, the spiral blade winding angle is too large, which is not beneficial to rock debris return and high-speed rotation of the drilling tool, increases the risk of pump holding, top stopping and driving, and can be started up only by the pump. The outer diameter of the spiral blade body is large, effective cutting on the well wall of a large-belly well section is difficult to realize, and the next construction requirement can be met by generally needing multiple times of well opening; the hole-cutting device is only provided with a single row of cutting teeth at the position of a taper angle, once a falling block is clamped between the well wall and the taper angle, the reverse grinding and crushing can not be carried out, the rock debris is accumulated continuously, the chip discharge groove is easy to block, and a pump is held back. The hard alloy column on the spiral blade body is of a cylindrical structure and is in a point contact mode with a hard stratum, so that the moment of torsion is large during reaming, and the top stopping driving is easy to hold.

Along with the year-by-year depth of exploration and development, the middle and shallow horizontal wells in the west of Sichuan enter the middle and later development stages, the gas reservoir of the Shaxi temple group is taken as a main productive layer, the formation pressure coefficient reaches 1.38-1.91, and the gas reservoir belongs to a high-pressure-abnormal high-pressure type gas reservoir, the sand-shale interbed is frequent, the stability of a well wall is poor, the heterogeneity of the formation is strong, and the drillability is poor. Under the influence of factors such as poor well body quality, large well body track dog legs, poor well bore purification, large thickness of a debris bed, poor drilling fluid performance and the like, the horizontal well generally has long preparation time for well completion and casing well running, a certain construction well is communicated for 10 times at most, the time is up to 30 days, and great difficulty and challenge are caused to the later-stage well completion operation. Therefore, a special drifting tool is needed to repair the well hole and ensure the safety of subsequent operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a hard formation horizontal well drifting with drawing hole ware, can exist undergauge, step, the well section wall of a well that collapses and restore in the hard formation horizontal well, improve the well cleaning performance, improve the shaft quality, shorten drifting operation time, reduce the risk of well drilling and well completion operation.

For solving above technical problem, the utility model discloses a hard formation horizontal well drifting is with drawing hole ware, including the cylinder, be equipped with the cylinder centre bore along the cylinder axis, the upper end of cylinder is equipped with toper female thread, the lower extreme of cylinder is equipped with toper male thread, cylinder middle section outer wall evenly is equipped with a plurality of spiral blades, has inlayed many carbide posts on the arris of rightting of each spiral blade respectively, the upper and lower both ends of spiral blade link to each other with the cylinder through the taper domatic respectively, is equipped with spiral overflow groove between the adjacent spiral blade respectively, and the upper portion in each spiral overflow groove is equipped with the last jet orifice that upwards sprays respectively, and each spiral blade and domatic cutting face have inlayed many triangular cutting teeth respectively, and the border of upper and lower taper domatic dorsad cutting face has inlayed many toper cutting teeth respectively.

As the improvement of the utility model, the hard alloy columns are arranged on the outer wall of each spiral blade in one row or more than two rows, and the hard alloy columns in each row are uniformly arranged along the spiral line of the spiral blade.

As a further improvement, the tapering is domatic to be divided into two sections and is close to that the cylinder is first domatic, and what be close to the spiral wing is that the second is domatic, and the contained angle between first domatic starting point and the cylinder surface is 30 respectively, and the contained angle between the domatic starting point of second and the cylinder axis is 20 respectively.

As a further improvement of the utility model, when the diameter of the shaft is less than or equal to 8 cellular inches, the external diameter of the body of the spiral blade is the diameter of the shaft minus 1/16 cellular inches; when the wellbore diameter is >8 ZZ ″, the body outer diameter of the helical blades is the wellbore diameter minus 1/8 inch or 1/16 inch; the width of the spiral blade is 40-50mm.

As a further improvement of the utility model, the distance between the adjacent three-edge cutting teeth is 10cm.

As a further improvement, the outer port of the upper jet hole is inclined upwards, and the included angle between the axis of the upper jet hole and the axis of the cylinder is 45 degrees.

As a further improvement of the utility model, the exposure height of the hard alloy columns is 4mm, the top of each hard alloy column is provided with a circular arc slope, the diameter of the bottom of each circular arc slope is 2mm, and the slope angle is 30-45 degrees.

As a further improvement of the utility model, the spiral blades are uniformly distributed in three numbers, and are clockwise and the winding angle is 270-360 degrees.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: 1. the problems and the defects that the conventional drifting tool and the drilling-while-drilling hole-drawing device cannot effectively repair the well wall, the drifting time is long, the underground risk is high and the like can be solved, the stability of the hole-drawing device, the trafficability of collapsed objects and the well wall repairing capacity are improved by optimizing key indexes such as the taper angle of the spiral blades, the winding angle, the outer diameter of the body, the width of the blades, the tooth arrangement and the like, the upper injection holes are increased, and the hole-drawing effect and the drifting quality are improved.

2. The hole scratching device for the well dredging can repair well walls with shrinkage, steps and collapsed well sections, improves well cleaning effect and well body quality, can form a high-quality smooth well after the well dredging of the hole scratching device, is small in torque during hole scratching, reduces damage to a drilling tool, reduces accident risk of the underground drilling tool, shortens well dredging operation time, improves drilling time and drilling time, reduces risks of well drilling and well completion operation and the like.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

FIG. 1 is a front view of the utility model of the hole-drawing device for the drifting of a horizontal well in a hard formation;

FIG. 2 is a cross-sectional view of a middle spiral blade of the present invention;

FIG. 3 is a perspective view of a middle three-edged cutting tooth of the present invention;

FIG. 4 is a perspective view of a tapered cutting tooth according to the present invention;

fig. 5 is a perspective view of the middle hard alloy column of the present invention.

In the figure: 1. a cylinder; 1a, conical female threads; 1b, a central hole of the cylinder; 1c, tapered male threads; 2. a spiral blade; 3. a taper slope; 3a, a first slope surface; 3b, a second slope surface; 4. a hard alloy post; 5. cutting teeth with three edges; 6. a tapered cutting tooth; 7. a spiral overflow chute; 8. and an upper injection hole.

Detailed Description

In the following description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not mean that the device must have a specific orientation.

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1 to 5, the utility model discloses a hard formation horizontal well drifting is with drawing hole ware, including cylinder 1, be equipped with cylinder centre bore 1b along the cylinder axis, the upper end of cylinder 1 is equipped with toper female thread 1a, and the lower extreme of cylinder 1 is equipped with toper male thread 1c, and cylinder middle section outer wall evenly is equipped with a plurality of

spiral blades

2, and 2 evenly distributed of spiral blade has threely, is dextrorotation and winding angle 270-360 to do benefit to the drilling tool rotation and the detritus is returned out, be favorable to improving drilling fluid circulation efficiency. The spiral blade 2 and the cylinder 1 are of an integrated structure, and the spiral blade is safe, reliable and high in durability.

A plurality of hard alloy columns 4 are respectively embedded on the righting edges of the spiral blades 2, and the upper end and the lower end of each spiral blade 2 are respectively connected with the column body 1 through the taper slope 3. The exposure height of the hard alloy columns 4 is 4mm, the top of each hard alloy column 4 is provided with an arc-shaped slope surface, the diameter of the bottom of each arc-shaped slope surface is 2mm, and the slope angle is 30-45 degrees. The arc-shaped slope surface structure enables the hard alloy column 4 to be in line smooth contact with a hard stratum, and the torque is small when the hole is scratched; the arranged teeth are all brazed at low temperature, so that the stability is enhanced.

The taper angle parts of the upper side and the lower side of the spiral blade 2 body, which are contacted with the drilling tool body, are designed into two sections of arc-shaped structures, namely a first slope surface 3a is arranged on the taper slope surface 3 close to the cylinder 1, a second slope surface 3b is arranged on the taper slope surface 3 close to the spiral blade 2, and the two slope surfaces are in arc transition. The included angles between the starting point of the first slope 3a far away from the spiral blade 2 and the outer surface of the cylinder are respectively 30 degrees, the included angles between the starting point of the second slope 3b and the axis of the cylinder are respectively 20 degrees, and the small angle of the chamfer surface enables collapsed matters not to be easily accumulated on the slope, so that the risk of drill sticking is reduced.

Spiral overflow grooves 7 are respectively arranged between the adjacent spiral blades 2, in order to improve the reverse reaming and sand carrying effect of the reaming device, upper injection holes 8 which are upwards injected are respectively arranged at the upper parts of the spiral overflow grooves 7, outer ports of the upper injection holes 8 incline upwards, and an included angle between the axis of each upper injection hole 8 and the axis of the column body is 45 degrees. The upper injection holes 8 may be fitted with different sized nozzles depending on the particular downhole conditions to achieve different water horsepower requirements. Can prevent upper portion detritus subside when just drawing the hole, go up jet orifice 8 when drawing the hole and can carry out the secondary acceleration to the detritus that returns upward, increase the energy that the detritus moved, guarantee the detritus effect that moves, furthest guarantees well purifying effect, prevents the balling, guarantees the drifting quality.

A plurality of triangular cutting teeth 5 are respectively embedded in the cutting surfaces of each spiral blade 2 and the taper slope surface 3, and one triangular cutting tooth 5 is arranged at an interval of 10cm so as to improve the transverse grinding and cutting effects.

The edges of the upper and lower taper slopes 3, which face away from the cutting surface, are respectively embedded with a plurality of tapered cutting teeth 6 so as to improve the stability of the cambered surface. The triangular cutting teeth 5 and the conical cutting teeth 6 with strong aggressivity and impact resistance are adopted on the two sides of the spiral blade 2 and are PDC cutting teeth, so that the tooth breaking probability is reduced, the rock breaking efficiency of the hole cutting device is improved, and the service life of the hole cutting device is prolonged.

The hard alloy columns 4 are arranged on the outer wall of each spiral blade 2 in one row or more than two rows, the two rows are usually distributed in a crossed manner, and the hard alloy columns 4 in each row are uniformly arranged along the spiral line of the spiral blade 2.

The outer diameter of the body of the spiral blade 2 is designed to be an underdimension, wherein when the diameter of the mineshaft is less than or equal to 8 bea inches, the outer diameter of the body of the spiral blade 2 is the diameter of the mineshaft minus 1/16 inch; when the wellbore diameter is >8, and inches, the body outside diameter of the helical blade 2 is the wellbore diameter minus 1/8 inch or 1/16 inch; the width of the spiral blade 2 is 40-50mm to ensure that rock debris smoothly passes through the chip groove.

When a regular borehole is encountered, the hard alloy columns 4 on the straightening edges of the spiral cutter wings firstly contact the borehole wall, so that tiny protrusions, rock debris beds and the like existing on the borehole wall are scraped, and the borehole quality is improved; when an irregular well wall is met, the triangular cutting teeth 5 on the cutting surface of the spiral blade contact with the well wall for repair, the hard alloy column 4 carries out secondary repair on the well wall, damage to a mud cake of the well wall is reduced as much as possible, and stability of the well wall is maintained.

When an underground collapsed object is encountered, the underground collapsed object firstly falls to the slope surface position at the tail end of the spiral blade, and the PDC cutting teeth on the spiral blade body and the PDC cutting teeth on the slope surface cut and crush the collapsed object by lifting, lowering or rotating the drilling tool forwards and backwards, so that the phenomenon that a large number of collapsed objects are accumulated to cause drill jamming is avoided, the phenomenon that a drill bit is jammed when the drilling tool is lifted is avoided, and the problem that the drill jamming is caused by underground collapse is solved. Meanwhile, the piled debris bed can be cleaned, the quality of a well hole is improved, and the occurrence of drilling sticking accidents is greatly reduced.

The foregoing is only a preferred and exemplary embodiment of the present invention, and the basic principles and main features of the present invention and the advantages of the present invention have been shown and described, without thereby limiting the scope of the present invention, which should be understood by those skilled in the art, and the present invention is not limited by the foregoing exemplary embodiments. In addition to the above embodiments, other embodiments of the present invention are also possible without departing from the spirit and scope of the present invention. The utility model discloses still can have various changes and improvements, all adopt the technical scheme that equivalent replacement or equivalent transform formed, all fall in the protection scope that the utility model discloses required. The scope of the invention is defined by the appended claims and equivalents thereof. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims

1. The utility model provides a hard formation horizontal well drifting is with drawing hole ware, includes the cylinder, is equipped with the cylinder centre bore along the cylinder axis, the upper end of cylinder is equipped with toper female screw, the lower extreme of cylinder is equipped with toper male thread, its characterized in that: the cylinder middle section outer wall evenly is equipped with a plurality of spiral blades, has inlayed many carbide posts respectively on the arris of rightting of each spiral blade, the upper and lower both ends of spiral blade link to each other with the cylinder through the domatic tapering respectively, is equipped with spiral overflow groove between the adjacent spiral blade respectively, and the upper portion in each spiral overflow groove is equipped with the last jet orifice of upwards spraying respectively, and each spiral blade and the domatic cutting face of tapering inlay many three-edged cutting teeth respectively, and the border of upper and lower domatic cutting face of tapering dorsad has inlayed many toper cutting teeth respectively.

2. The drift of hard formation horizontal well according to claim 1, characterized in that: the hard alloy columns are arranged on the outer wall of each spiral blade in one row or more than two rows, and each row of hard alloy columns are uniformly arranged along the spiral line of the spiral blade.

3. The drift of hard formation horizontal well according to claim 1, characterized in that: the taper slope surface is divided into two sections, a first slope surface is close to the cylinder body, a second slope surface is close to the spiral blade, the included angles between the starting point of the first slope surface and the outer surface of the cylinder body are respectively 30 degrees, and the included angles between the starting point of the second slope surface and the axis of the cylinder body are respectively 20 degrees.

4. The drift of hard formation horizontal well according to claim 1, characterized in that: when the diameter of the mineshaft is less than or equal to 8 dB inches, the outer diameter of the body of the spiral wing is less than 1/16 inch of the diameter of the mineshaft; the helical blade has a body outer diameter of wellbore diameter minus 1/8 inch or 1/16 inch when the wellbore diameter is >8 unity; the width of the spiral blade is 40-50mm.

5. The hard formation horizontal well scriber for drifting according to claim 1, which is characterized in that: the distance between adjacent triangular cutting teeth is 10cm.

6. The drift of hard formation horizontal well according to claim 1, characterized in that: the outer port of the upper jet hole is inclined upwards, and the included angle between the axis of the upper jet hole and the axis of the cylinder is 45 degrees.

7. The drift of hard formation horizontal well according to claim 1, characterized in that: the exposure height of the hard alloy columns is 4mm, the top of each hard alloy column is provided with an arc-shaped slope, the diameter of the bottom of each arc-shaped slope is 2mm, and the slope angle is 30-45 degrees.

8. The hard formation horizontal well reamer for drifting according to any one of claims 1 to 7, characterized in that: three spiral blades are uniformly distributed, and are all right-handed, and the winding angle is 270-360 degrees.