CN210033348U

CN210033348U - Impact type shoe grinding tool for horizontal well

Info

Publication number: CN210033348U
Application number: CN201920638108.1U
Authority: CN
Inventors: 郑星奇; 王阳; 陈城; 莫文兵; 侍新兰
Original assignee: Yangtze University
Current assignee: Yangtze University
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2020-02-07
Anticipated expiration: 2029-05-06

Abstract

The utility model discloses a horizontal well impacted style grind shoe instrument, include: the shoe grinding machine comprises an upper connector, a flow guide mechanism, a centering mechanism and a shoe grinding head, wherein the flow guide mechanism comprises a shell, a clamping jaw, a flow distribution cap, a main shaft, an upper centering bearing, a turbine, an adjusting ring, a flow guide ring and a lower centering bearing, which are arranged in the shell; one end of the shunting cap is connected with the main shaft, the other end of the shunting cap penetrates through the through hole, and one end of the clamping jaw is connected with the main shaft in the shell; the upper centering bearing is sleeved on the main shaft close to one side of the shunting cap, the lower centering bearing is sleeved on the main shaft close to one side of the clamping jaw, a turbine, an adjusting ring and a flow guide ring are sequentially sleeved on the main shaft between the upper centering bearing and the lower centering bearing, the flow guide ring is abutted with the lower centering bearing, and an inner convex block is further arranged in a shell between the turbine and the adjusting ring; the main shaft is also provided with a central flow passage and a flow guide bypass, the central flow passage is communicated with the flow guide bypass, and the flow guide bypass is correspondingly arranged with the inner convex block. The utility model discloses can fall the mill and subtract the resistance, effectively improve the mechanical drilling speed of grind shoe instrument.

Description

Impact type shoe grinding tool for horizontal well

Technical Field

The utility model relates to an oil well horizontal well repairing tool technical field, concretely relates to horizontal well impacted style grind shoe instrument.

Background

In recent years, with the rapid development of the exploration and development of shale gas and compact oil and gas reservoirs, the pumping bridge plug and perforation combined staged fracturing technology is used as a novel horizontal well staged modification main body technology and has been widely applied to the staged fracturing construction of unconventional oil and gas reservoirs at home and abroad. The technology has the main characteristics of simple tool string entering the well, unlimited staged fracturing layer number and the like. The method has the advantages that the bridge plugs in the shaft are drilled and ground one by one safely and efficiently after fracturing, so that a key link for recovering the full-drift-diameter shaft is realized, and the smooth construction of subsequent operation is guaranteed.

Generally, an oil pipe with a shoe grinding tool is adopted for drilling and grinding operation in China, but in the drilling process of a horizontal well, friction between the oil pipe and the well wall and friction torque between a shoe grinding tool and the well wall are important factors influencing the drilling speed, the mechanical drilling speed of the shoe grinding tool is reduced due to the friction and the friction torque, the tool surface is difficult to control, a single-trip drilling ruler is reduced, abnormal and serious shoe grinding abrasion and the like are caused, when the accumulated friction exceeds the applied drilling pressure, the pressure supporting phenomenon can occur, the oil pipe is forced to be subjected to normal-rotation bending or spiral buckling, and even the smooth construction of an oil well can be influenced.

In view of the above, there is a need to develop an impact shoe grinding tool for horizontal wells to solve the problems of the existing shoe grinding tools for horizontal wells.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned technique not enough, provide a horizontal well impacted style mill shoes instrument, this horizontal well impacted style mill shoes instrument can fall the mill drag reduction, has effectively improved the mechanical drilling speed of horizontal well impacted style mill shoes instrument through producing axial vibration.

In order to achieve the technical purpose, the technical scheme of the utility model provide a horizontal well impacted style grinds shoes instrument, include: an upper joint, a flow guide mechanism, a righting mechanism and a shoe grinding head, wherein,

a through hole is formed in the center of the upper joint;

the flow guide mechanism comprises a shell, a clamping jaw, a flow distribution cap, a main shaft, an upper centering bearing, a turbine, an adjusting ring, a flow guide ring and a lower centering bearing, wherein the flow distribution cap, the main shaft, the upper centering bearing, the turbine, the adjusting ring, the flow guide ring and the lower centering bearing are arranged in the shell; one end of the shunting cap is connected with the main shaft, the other end of the shunting cap penetrates through the through hole, and one end of the clamping jaw is connected with the main shaft in the shell; the upper centering bearing is sleeved on the main shaft close to one side of the shunting cap, the lower centering bearing is sleeved on the main shaft close to one side of the clamping jaw, a turbine, an adjusting ring and a flow guide ring are sequentially sleeved on the main shaft between the upper centering bearing and the lower centering bearing, the flow guide ring is abutted with the lower centering bearing, and an inner convex block is further arranged in a shell between the turbine and the adjusting ring; the main shaft is also provided with a central flow passage and a flow guide bypass, the central flow passage is communicated with the flow guide bypass, and the flow guide bypass is correspondingly arranged with the inner convex block;

the centering mechanism comprises a centering tool body, one end of the centering tool body is connected with the clamping jaw, and a channel communicated with the central flow passage is arranged in the centering tool body;

one end of the shoe grinding head is connected with the righting tool body, the other end of the shoe grinding head is connected with the hard alloy cutter, a spraying channel communicated with the channel is arranged in the shoe grinding head, a plurality of nozzles are further arranged on the peripheral surface of the shoe grinding head and one side close to the hard alloy cutter, and the nozzles are communicated with the spraying channel.

Compared with the prior art, the beneficial effects of the utility model include:

1. in the utility model, the medium-high pressure liquid enters the flow guide mechanism from the through hole of the upper joint to drive the turbine to rotate, the turbine drives the main shaft to rotate, and the inner lug and the flow guide bypass form a movable valve and a fixed valve in the rotation process of the main shaft, so that the inner lug and the flow guide bypass realize periodic opening and closing and generate periodic pressure pulse to enable the horizontal well impact type shoe grinding tool to generate axial vibration, thereby effectively improving the mechanical drilling speed of the horizontal well impact type shoe grinding tool and achieving better resistance reduction effect;

2. the main shaft is connected with the shoe grinding head through the righting tool body, high-pressure liquid enters a spraying channel of the shoe grinding head from a central flow channel, and drilling cuttings left during drilling and grinding operation are washed through a nozzle, so that the drilling cuttings are discharged out of a shaft as soon as possible, the shoe grinding tool cannot be clamped, and the mechanical rotating speed and the drilling efficiency of the shoe grinding tool are influenced;

3. the utility model provides a horizontal well impacted style mill shoe instrument, design benefit, convenient to use can not only fall and grind the drag reduction, have effectively improved horizontal well impacted style mill shoe instrument's speed of mechanical drilling through producing axial vibration, can also solve the problem that the current mill shoe instrument ubiquitous takes the rock effect poor and the efficiency of construction low through the nozzle.

Drawings

FIG. 1 is a schematic structural view of the horizontal well impact shoe grinding tool of the present invention;

FIG. 2 is a sectional view of the diversion mechanism A-A of the present invention;

FIG. 3 is a schematic view of the structure of the milling head of the present invention;

fig. 4 is a schematic structural view of the nozzle of the present invention.

The symbols in the above figures represent:

100-upper joint, 200-guide mechanism, 300-righting mechanism, 400-grinding shoe head, 201-diversion cap, 202-upper righting bearing, 203-turbine, 204-shell, 205-adjusting ring, 206-guide ring, 207-main shaft, 208-lower righting bearing, 209-sealing ring, 210-end cover, 211-jaw, 301-righting tool body, 302-righting lug, 401-nozzle, 402-hard alloy cutter, 403-chip guide groove, 204 a-inner bump, 207 a-central runner, 207 b-guide bypass, 401 a-rear nozzle, 401 b-oblique nozzle, 401 c-front nozzle, 401 d-nozzle body, 401 e-baffle ring and 401 f-swirl wheel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Fig. 1 ~ 4 are according to the utility model provides a horizontal well impacted style grind shoe instrument.

As shown in fig. 1 to 2, the impact shoe grinding tool for a horizontal well includes: an upper joint 100, a flow guide mechanism 200, a righting mechanism 300 and a milling head 400, wherein,

the upper joint 100 is provided with a through hole (not shown in fig. 1) at the center;

the flow guide mechanism 200 comprises a shell 204, a jaw 211, a flow distribution cap 201, a main shaft 207, an upper centering bearing 202, a turbine 203, an adjusting ring 205, a flow guide ring 206 and a lower centering bearing 208, wherein the flow distribution cap 201, the main shaft 207, the upper centering bearing 202, the turbine 203, the adjusting ring 205, the flow guide ring 206 and the lower centering bearing 208 are arranged in the shell; one end of the shunting cap 201 is connected with the main shaft 207, the other end of the shunting cap is arranged in the through hole in a penetrating way, and one end of the clamping jaw 211 is connected with the main shaft 207 in the shell; the upper centering bearing 202 is sleeved on the main shaft 207 close to one side of the diversion cap 201, the lower centering bearing 208 is sleeved on the main shaft 207 close to one side of the clamping jaw 211, a turbine 203 (consisting of a turbine stator and a turbine rotor), an adjusting ring 205 and a guide ring 206 are sequentially sleeved on the main shaft between the upper centering bearing 202 and the lower centering bearing 208, the guide ring 206 is abutted with the lower centering bearing 208, and an inner convex block 204a is further arranged in a shell 204 between the turbine 203 and the adjusting ring 205; the main shaft 207 is also provided with a central flow passage 207a and a flow guide bypass 207b, the central flow passage 207a is communicated with the flow guide bypass 207b, and the flow guide bypass 207b is correspondingly arranged with the inner convex block 204 a;

it should be noted that, a portion between the inner wall of the adjusting ring 205 and the main shaft 207 is hollow, and the outer wall thereof is fixedly connected with the housing 204; the outer wall of the guide ring 206 is abutted with the shell 204, the inner wall of the guide ring 206 is abutted with the main shaft 207, and the part between the outer wall and the inner wall of the guide ring 206 is solid; the arrangement enables high-pressure liquid entering the flow guide mechanism to pass through the adjusting ring 205 and generate impact force on the flow guide ring, so that the impact type shoe grinding tool for the horizontal well generates axial vibration.

The centering mechanism 300 comprises a centering tool body 301, one end of the centering tool body 301 is connected with the clamping jaw 211, and a channel (not shown in the channel figure 1) communicated with the central flow channel 207a is arranged in the centering tool body 301;

one end of the shoe grinding head 400 is connected with the righting tool body 301, the other end of the shoe grinding head is connected with the hard alloy cutter 402, a spraying channel (not shown in the spraying channel figure 1) communicated with the channel is arranged in the shoe grinding head 400, a plurality of nozzles 401 are further arranged on the peripheral surface of the shoe grinding head 400 and one side close to the hard alloy cutter 402, and the nozzles 401 are communicated with the spraying channel.

On the basis of the above embodiments, as an optional embodiment, the aperture of the through hole in the center of the upper joint 100 on the side far away from the diversion cap 201 is larger than the aperture on the side close to the diversion cap 201, and the side with the larger aperture and the side with the smaller aperture are in smooth transition; the high-pressure liquid enters the diversion mechanism by limiting the inflow direction of the high-pressure liquid, and then the turbine rotor is driven to rotate.

On the basis of the above embodiments, as an optional embodiment, one end of the diversion cap 201 penetrating into the through hole is in a circular truncated cone shape, and the other end of the diversion cap 201 is in threaded connection with the main shaft 207; so that the high-pressure liquid enters the diversion mechanism along the two sides of the diversion cap.

Fig. 2 is a cross-sectional view of the diversion mechanism a-a according to the present invention, as shown in fig. 2, the main shaft 207 is provided with three evenly distributed diversion side channels 207b along the radial direction, three inner convex blocks 204a are provided in the housing 204, and the diversion side channels 207b are provided in one-to-one correspondence with the inner convex blocks 204 a. The arrangement is that when the main shaft rotates, the inner convex block and the diversion bypass are periodically opened and closed to generate periodic pressure pulses, so that the horizontal well impact type shoe grinding tool generates axial vibration, the mechanical drilling speed of the horizontal well impact type shoe grinding tool is effectively improved, and a good resistance reduction effect is achieved.

It should be noted that the width of the inner protrusion 204a is smaller than the width of the flow guiding side channel 207b, so as to ensure that when the inner protrusion 204a and the flow guiding side channel 207b are closed, a small amount of liquid can still enter the central flow channel 207a, so that the shoe grinding tool can work uninterruptedly; the width of interior lug is little how much than the width of water conservancy diversion side road, the utility model discloses do not do further injecing, as long as can guarantee to produce periodic pressure pulse when the main shaft is rotatory, can guarantee again that the mill shoes instrument can uninterrupted work in succession can, technical personnel in the field can adjust according to the in-service use condition.

On the basis of the above embodiments, as an alternative embodiment, one side of the deflector ring 206 close to the adjustment ring 205 is an inclined surface; the arrangement is to increase the contact area of the high-pressure liquid and the guide ring and further increase the impact force of the high-pressure liquid on the guide ring.

On the basis of the above embodiments, as an optional embodiment, the flow guide mechanism further includes a sealing ring 209 and an end cover 210, one side of the end cover 210 is connected with the housing 204, and the other side is connected with the clamping jaws 211 in a sliding fit manner; a sealing ring 209 is provided in the region between the end cap 210 and the jaws 211; so set up in order to guarantee that water conservancy diversion mechanism has better leakproofness, prevents that high-pressure liquid from leaking outward.

On the basis of the above embodiments, as an optional embodiment, the centering tool body 301 is a diameter-variable body, and three centering protrusions 302 are uniformly arranged on the outer circumference of the centering tool body 301; so set up and to protect oil pipe and horizontal well impacted style mill shoe instrument to avoid receiving to scrape and bump and wearing and tearing, make the line contact between oil pipe and horizontal well impacted style mill shoe instrument and the pit shaft become some sliding contact to reduce frictional resistance, also reach the purpose that horizontal well impacted style mill shoe instrument was right simultaneously, and then improve and transfer the tubular column construction success rate.

Fig. 3 is a schematic structural view of the milling shoe head of the present invention, as shown in fig. 3, the nozzle 401 on the milling shoe head 400 includes a front nozzle 401c, an oblique nozzle 401b and a rear nozzle 401a, the front nozzle 401c and the oblique nozzle 401b are disposed at one side close to the carbide blade 402, the front nozzle 401c is disposed parallel to the spraying channel, and the oblique nozzle 401b is disposed obliquely to the spraying channel; the rear end nozzle 401a is provided on the circumferential surface of the shoe grinding head 400, and is provided obliquely to the nozzle passage. So set up drilling cuttings that front end nozzle and oblique end nozzle can many-sided washing brill grinding operation leave, make drilling cuttings discharge wellbore as fast as possible not block horizontal well impact type milling shoe instrument, the rear end nozzle can be used when pulling up the instrument, washes drilling cuttings toward the wellbore mouth to carry drilling cuttings along with horizontal well impact type milling shoe instrument discharge wellbore together.

On the basis of the above embodiments, as an alternative embodiment, a plurality of carbide knives 402 are fixedly connected with the distal end of the milling shoe head 400 and are uniformly distributed along the circumferential surface of the distal end of the milling shoe head 400.

On the basis of the above embodiments, as an optional embodiment, the circumferential surface of the milling shoe head 400 is further provided with a plurality of chip guide grooves 403; according to the arrangement, when the horizontal well impact type shoe grinding tool is used for drilling and grinding, drill cuttings can conveniently move beside the horizontal well impact type shoe grinding tool through the cuttings guide grooves, and the drilling efficiency and the drilling speed of the horizontal well impact type shoe grinding tool are not affected.

Fig. 4 is a schematic structural diagram of the nozzle of the present invention, as shown in fig. 4, the nozzle 401 is composed of a nozzle body 401d, a baffle ring 401e and a swirl wheel 401f, wherein the nozzle body 401d is fixedly connected with the shoe grinding head 400, the swirl wheel 401f is fixedly installed inside the nozzle body 401d through the baffle ring 401e, one end of the swirl wheel 401f is arc-shaped, and a plurality of swirl blades distributed spirally are arranged on the circumference of the swirl wheel 401 f; so set up the in-process that makes the high-pressure liquid who gets into the nozzle spout under the guide of whirl wheel, the whirl blade that the heliciform set up can make high-pressure liquid form the whirl, further strengthens high-pressure liquid's whirl dynamics to reach this horizontal well impacted style milling tool of reinforcing and wash drill chip, make the mesh of the effective discharge pit shaft of drill chip.

On the basis of the above embodiments, as an alternative embodiment, the connection in the present invention is a threaded connection, unless otherwise specified.

The working principle is as follows: in the working process of the horizontal well impact type shoe grinding tool, high-pressure liquid enters the flow guide mechanism from the through hole of the upper joint 100, the high-pressure liquid drives the turbine 203 to rotate through the arc conical surface in the upper joint 100, the turbine 203 drives the main shaft 207 to rotate, the inner bump 204a and the flow guide bypass 207b form a movable valve and a fixed valve, and when the inner bump 204a and the flow guide bypass 207b are closed, the high-pressure liquid enters the adjusting ring 205 to generate impact force on the flow guide ring 206, so that the horizontal well impact type shoe grinding tool generates axial vibration; when the inner protrusion 204a is offset from the diversion bypass 207b, the high pressure liquid then flows into the central channel 207a from the diversion bypass 207b on the main shaft 207; therefore, in the rotation process of the main shaft 207, the inner convex blocks 204a and the diversion side channels 207b are periodically opened and closed, periodic pressure pulses are generated, the horizontal well impact type shoe grinding tool generates axial vibration, the mechanical drilling speed of the horizontal well impact type shoe grinding tool is effectively improved, and a good resistance reduction effect is achieved; the main shaft 207 is connected with the shoe grinding head 400 through the centering tool body 301, the main shaft 207 can drive the centering tool body 301 and the shoe grinding head 400 to rotate when rotating, high-pressure liquid flowing out of the central flow passage 207a can flow into the centering tool body 301 and then flow into the shoe grinding head 400 to enter the front end nozzle 401c, the inclined end nozzle 401b and the rear end nozzle 401a, the high-pressure liquid is sprayed out in a centrifugal mode under the action of the cyclone wheel 401f, the high-pressure liquid entering the nozzle body 401d is in a cyclone state, a cyclone flushing effect is achieved, drill cuttings move to the side of the horizontal well impact type shoe grinding tool through the drill cuttings guiding groove 403 under the action of the cyclone high-pressure liquid during rotary drilling and grinding operation of the shoe grinding head 400, and the drill cuttings discharging effect is improved through the drill cuttings guiding groove 403. After the drilling and grinding operation is finished, the horizontal well impact type shoe grinding tool is pulled up, the rear end nozzle 401a washes drill cuttings towards the shaft opening, and the drill cuttings are carried and discharged out of the shaft along with the horizontal well impact type shoe grinding tool.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A horizontal well impact shoe grinding tool, comprising: an upper joint, a flow guide mechanism, a righting mechanism and a shoe grinding head, wherein,

a through hole is formed in the center of the upper joint;

2. The horizontal well impact shoe grinding tool according to claim 1, wherein the diameter of the through hole in the center of the upper joint on the side away from the diversion cap is larger than the diameter of the through hole on the side close to the diversion cap, and the side with the larger diameter is in smooth transition with the side with the smaller diameter.

3. The horizontal well impact shoe grinding tool according to claim 1, wherein the main shaft is provided with three evenly distributed flow guide side channels along a radial direction, three inner convex blocks are arranged in the housing, and the flow guide side channels and the inner convex blocks are arranged in a one-to-one correspondence manner.

4. The horizontal well impact shoe milling tool according to claim 1, wherein a portion between the inner wall of the adjustment ring and the main shaft is hollow, and the outer wall of the adjustment ring is fixedly connected with the housing; the outer wall of the guide ring is abutted against the shell, the inner wall of the guide ring is abutted against the main shaft, and the part between the outer wall and the inner wall of the guide ring is solid.

5. The horizontal well impact shoe milling tool of claim 1 wherein the deflector ring is beveled on a side adjacent the adjustment ring.

6. The horizontal well impact shoe grinding tool according to claim 1, wherein the deflector mechanism further comprises a sealing ring and an end cap, one side of the end cap is connected with the housing, and the other side of the end cap is connected with the jaw in a sliding fit manner; the sealing ring is disposed in an area between the end cap and the jaw.

7. The horizontal well impact shoe grinding tool according to claim 1, wherein the centralizing tool body is a reducing body, and three centralizing convex blocks are uniformly arranged on the outer circumference of the centralizing tool body.

8. The horizontal well impact shoe milling tool according to claim 1, wherein the nozzles on the shoe milling head comprise a front nozzle, a slant nozzle and a rear nozzle, the front nozzle and the slant nozzle are arranged on one side close to the cemented carbide cutter, the front nozzle is arranged in parallel with the jet channel, and the slant nozzle is arranged in an inclined manner with the jet channel; the rear end nozzle is arranged on the circumferential surface of the shoe grinding head and is obliquely arranged with the spray channel.

9. The horizontal well impact shoe grinding tool according to claim 1, wherein the circumferential surface of the shoe grinding head is further provided with a plurality of chip guide grooves.

10. The horizontal well impact type shoe grinding tool according to claim 1, wherein the nozzle is composed of a nozzle body, a baffle ring and a swirl wheel, the nozzle body is fixedly connected with the shoe grinding head, the swirl wheel is fixedly installed in the nozzle body through the baffle ring, one end of the swirl wheel is arc-shaped, and a plurality of swirl blades distributed spirally are arranged on the circumference of the swirl wheel.