CN111322027B - Ratchet type two-stage positioning sleeve milling drill rod inner cutter - Google Patents
Ratchet type two-stage positioning sleeve milling drill rod inner cutter Download PDFInfo
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- CN111322027B CN111322027B CN202010191497.5A CN202010191497A CN111322027B CN 111322027 B CN111322027 B CN 111322027B CN 202010191497 A CN202010191497 A CN 202010191497A CN 111322027 B CN111322027 B CN 111322027B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
- E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
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Abstract
The invention relates to a ratchet wheel type secondary positioning sleeve milling drill rod inner cutter which is sequentially provided with a secondary shaft pushing reset unit and a cutting unit along the axial direction, wherein the cutting unit is provided with a cutting knife radial pushing piece along the axial direction, and a cutting knife is arranged in axial contact with the cutting knife radial pushing piece; the first-stage axial movement of the second-stage axial pushing resetting unit drives the radial pushing piece of the cutting knife to axially move so that the cutting knife is radially opened; the second-stage axial movement of the second-stage axial pushing reset unit drives the axial movement of the radial pushing piece of the cutting knife to reset the cutting knife. The inner cutter of the ratchet wheel type secondary positioning sleeve milling drill rod adopts the functions of opening by high-pressure water, cutting the sleeve milling drill rod by low-pressure water and closing the high-pressure water, thereby realizing the purpose of quickly, efficiently and reliably cutting the sleeve milling drill rod in the nearly horizontal drilling.
Description
Technical Field
The invention relates to the technical field of underground drilling of coal mines, in particular to a ratchet wheel type secondary positioning sleeve milling cutter inside a drill rod.
Background
With the popularization of high-power directional drilling equipment, particularly the generation of world records of 3350m of underground nearly horizontal directional drill holes of coal mines, nearly horizontal directional drilling technology and equipment are widely applied to coal mine safety production, and the technology comprises various aspects such as gas extraction, water damage prevention and control, geological exploration and the like. In the drilling tool combination, the value of a hole bottom drilling tool is particularly high, the milling and fishing technology is one of the most stable directional drilling clamping and burying accident processing methods applied at present, but the clamping and burying accident stratum is relatively complex, secondary clamping accidents are easily caused on a large-diameter milling drilling rod, the difficulty and the complexity of accident processing are greatly increased, particularly in the directional drilling with the depth of more than 500m, the difficulty of the clamping and burying accident processing of the milling drilling rod is increased, the simple reversal processing can only process the milling drilling rod at the section close to the hole opening, the milling drilling tool is effectively separated from a clamping and burying point, and a precondition is provided for the subsequent accident processing.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a ratchet wheel type secondary positioning internal cutter for milling a drill rod by using high-pressure water to open when a large-diameter casing milling drilling tool is clamped and buried for drilling, so that the aim of quickly and efficiently cutting the casing milling drill rod in a near-horizontal drilling hole is fulfilled.
In order to achieve the purpose, the invention adopts the technical scheme that:
a ratchet wheel type secondary positioning sleeve milling drill rod inner cutter is sequentially provided with a secondary axial pushing reset unit and a cutting unit along the axial direction, wherein the cutting unit is provided with a cutting knife radial pushing piece along the axial direction, and a cutting knife is arranged in axial contact with the cutting knife radial pushing piece; the first-stage axial movement of the second-stage axial pushing resetting unit drives the radial pushing piece of the cutting knife to axially move so that the cutting knife is radially opened; the second-stage axial movement of the second-stage axial pushing reset unit drives the axial movement of the radial pushing piece of the cutting knife to reset the cutting knife.
Optionally, the power of the secondary shaft pushing resetting unit is from high-pressure water; and the movement direction of the primary axial movement is the same as that of the secondary axial movement.
Optionally, the second-stage axial-pushing resetting unit is provided with a second-stage ratchet positioning tube along the axial direction, the axial moving end of the second-stage ratchet positioning tube is provided with a plurality of racks at intervals along the circumferential direction, each rack is composed of a first-stage rack and a second-stage rack, the width of the first-stage rack is 2 times that of the second-stage rack, and the height of the second-stage rack is greater than that of the first-stage rack.
Optionally, a pusher and a positioning force transmission piece are sequentially embedded in the secondary ratchet positioning tube along the axial direction, the pusher and the positioning force transmission piece are clamped along the axial direction, and a plurality of positioning tooth keys are arranged on the outer wall of the positioning force transmission piece;
the positioning tooth key is clamped and positioned with the first-stage rack or the second-stage rack of the second-stage ratchet positioning pipe along the axial direction.
Optionally, the pusher is a cylindrical member, the outer wall of the pusher is provided with a plurality of positioning keys, and the edge of one end of the pusher is provided with a plurality of positioning teeth;
and a throttle needle is inserted into the inner wall of the pusher.
Optionally, a spring positioning column is axially arranged at the end of the positioning force transmission piece, and a pushing spring is sleeved on the spring positioning column; the spring positioning column is coupled with the cutting knife radial pushing piece in a shaft mode.
Optionally, a first tube body axially connected is further arranged between the cutting unit and the second-stage axial pushing resetting unit, the cutting unit is further provided with a second tube body, and a positioning sleeve and a pin are coaxially arranged at the joint of the second tube body and the first tube body;
a first return spring is sleeved between the secondary shaft pushing return unit and the positioning sleeve.
Optionally, the cutting blade radial pushing member includes a cylindrical base and a conical expanding member, which are axially arranged, and the conical expanding member is a cone with an outer diameter gradually increasing from the end to the root.
Optionally, the cutting blade is composed of a plurality of blade bodies hinged to the inner wall of the second pipe body, and an opening is formed in the second pipe body corresponding to the position of the cutting blade;
the cutter body be the part on the collinear with the cutting tool bit for cutting the handle of a knife, a plurality of cutters are in cutting tool bit department towards the axle center back to back the setting, the tool bit evenly set up the cutting edge along the side.
Optionally, a centering guide unit is further arranged in axial connection with the cutting unit, the centering guide unit includes a guide head and a centering sleeve sleeved outside the guide head, and the outer diameters of the centering sleeve are both larger than the outer diameter of the cutting unit and the outer diameter of the secondary axial-thrust resetting unit.
According to the ratchet wheel type two-stage positioning internal cutting device for the milling drill rod of the milling machine, the high-pressure water is adopted to open, the low-pressure water is used to cut the milling drill rod of the milling machine, and the high-pressure water is used to close, so that the aim of quickly, efficiently and reliably cutting the milling drill rod in the nearly horizontal drilling process is fulfilled.
The details of the present invention can be obtained from the following description and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure.
FIG. 1 is a schematic view of the ratchet type two-stage positioning sleeve milling drill pipe inner cutter of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic structural view of a two-stage ratchet positioning outer tube of the present invention;
FIG. 4 is a schematic view of the force transmitting positioning assembly of the present invention;
FIG. 5 is a schematic view of the cutting blade of the present invention;
reference numerals:
1-a secondary shaft pushing reset unit, 2-a cutting unit and 3-a centering guide unit;
11-a second-stage ratchet wheel positioning tube, 111-a first-stage rack, 112-a second-stage rack, 12-a throttle needle, 13-a sealing ring, 14-a pusher, 141-a positioning key, 142-a positioning tooth, 15-a positioning force transmission piece, 151-a positioning tooth key, 152-a spring positioning column, 16-a first return spring, 17-a pushing spring, 18-a first tube body and 19-a connecting rod;
21-a positioning sleeve, 22-a pin, 23-a cutting knife radial pushing piece, 24-a second tube, 25-a second return spring, 26-a pin shaft, 27-a cutting knife, 271-a cutting knife handle, 272-a cutting knife head and 273-a cutting edge;
31-guide head, 32-centralizing sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
It should be understood that the structures, ratios, sizes, left ends, right ends, etc. shown in the drawings attached to the present specification are generally defined by the drawings of the corresponding drawings without being described to the contrary, and are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the conditions under which the present invention can be implemented, so that the present invention has no technical essence, and any structural modifications, changes in the proportional relationship, or adjustments of the sizes should still fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention.
In the present disclosure, unless otherwise specified, use of the directional terms "upper" and "lower" generally refer to the definition in the drawing figures of the accompanying drawings, and "inner" and "outer" refer to the inner and outer of the contours of the corresponding parts.
With reference to fig. 1-5, the ratchet wheel type second-stage positioning sleeve milling drill rod inner cutter of the invention is provided with a second-stage axial pushing reset unit 1 and a cutting unit 2 in sequence along the axial direction, the cutting unit 2 is provided with a cutting blade radial pushing member 23 along the axial direction, and a cutting blade 27 is arranged in axial contact with the cutting blade radial pushing member 23; the first-stage axial movement of the second-stage axial pushing resetting unit 1 drives the cutting knife radial pushing piece 23 to axially move so that the cutting knife 27 is radially opened; the secondary axial movement of the secondary axial pushing reset unit 1 drives the axial movement of the cutting blade radial pushing member 23 to reset the cutting blade 27. In particular, in the embodiment of the present disclosure, the power of the secondary shaft-push resetting unit 1 comes from high-pressure water; and the movement direction of the primary axial movement is the same as that of the secondary axial movement. The cutting knife 27 can be opened or closed under the action of underground high-pressure water, the control is convenient for underground operation, the operation of the cutting knife 27 is controlled by only providing the leading high-pressure water and switching on or off the high-pressure water, particularly, the cutting knife 27 is radially opened to expose a cutting edge, and the cutting knife is matched with the axial movement of a drill rod to cut the drill rod, so that the underground efficient and safe operation requirement is met.
In the embodiment of the present disclosure, the secondary shaft-push resetting unit 1 is provided with the secondary ratchet positioning tube 11 along the axial direction, the axial moving end of the secondary ratchet positioning tube 11 is provided with a plurality of racks at intervals along the circumferential direction, the racks are composed of the primary rack 111 and the secondary rack 112, the width of the primary rack 111 is 2 times that of the secondary rack 112, and the height of the secondary rack 112 is greater than that of the primary rack 111. Referring to fig. 3, the second-stage ratchet wheel positioning tube 11 is connected with the drill rod, threads for positioning and fixing the throttle needle 12 are arranged in the second-stage ratchet wheel positioning tube, the first-stage axial movement of the second-stage axial pushing resetting unit 1 can be realized through the first-stage rack 111, the second-stage axial movement of the second-stage axial pushing resetting unit 1 can be realized through the second-stage rack 112, and the opening and resetting of the cutting knife 27 can be realized along the same axial movement.
In the embodiment of the disclosure, a pusher 14 and a positioning force transmission piece 15 are sequentially embedded in the secondary ratchet positioning tube 11 along the axial direction, the pusher 14 and the positioning force transmission piece 15 are clamped along the axial direction, and a plurality of positioning toothed keys 151 are arranged on the outer wall of the positioning force transmission piece 15; the positioning toothed key 151 is axially clamped and positioned with the primary rack 111 or the secondary rack 112 of the secondary ratchet positioning tube 11. Specifically, the positioning toothed key 151 on the positioning force transmission piece 15 is axially clamped and positioned with the first-stage rack 111 or the second-stage rack 112 to realize the first-stage axial movement of the second-stage axial pushing reset unit 1 and the second-stage axial movement of the second-stage axial pushing reset unit 1, so that the cutting knife 27 is ensured to be opened and reset along the same axial movement.
In the embodiment of the present disclosure, the pusher 14 is a cylindrical member, the outer wall of the pusher 14 is provided with a plurality of positioning keys 141, and the sealing ring 13 is installed in the sealing groove of the pusher 14; a plurality of positioning teeth 142 are arranged at one end edge of the pusher 14; the throttle needle 12 is inserted into the inner wall of the pusher 14. The throttle needle 12 is fixed in the secondary ratchet positioning pipe 11 through threads, and a water passing channel is arranged between a needle post of the throttle needle 12 and a thread ring; the rear section of the needle column is cylindrical, the front section of the needle column is conical, and a needle is inserted into an inner hole of the pusher 14; preferably, the pusher 14 is provided with 6 positioning parts 141, is arranged in a groove of the secondary ratchet positioning pipe 11 and can slide along a groove shaft, the center of the pusher 14 is provided with a water through hole, the inner diameter of the water through hole is the same as the outer diameter of the pin column cylindrical section of the throttle needle 2, the number of the positioning teeth of the pusher is preferably 12, and the positioning teeth are axially meshed with a positioning tooth key of the positioning force transmission part 15;
in the embodiment of the present disclosure, a spring positioning column 152 is axially disposed at an end of the positioning force transmission member 15, and the spring positioning column 152 is sleeved with the pushing spring 17; the spring-loaded posts 152 axially engage the cutting-blade radial push 23. The front end of the positioning force transmission piece 15 is provided with 6 spline type inclined teeth, namely a positioning tooth key 152, which are arranged in a groove of the secondary ratchet wheel positioning tube 11 and are contacted with a rack of the pusher 14, the rear end of the positioning force transmission piece is provided with a positioning step and a spring positioning column 152, a hole is arranged in the spring positioning column 152, the connecting rod 19 is inserted into the hole, the end part of the spring positioning column is provided with a thread and is connected with a nut, and the connecting rod 19 is connected with an inner hole; one end of the first return spring 16 is limited by the cross section of the bottom of the step of the positioning force transmission piece 15, and the other end is limited by the positioning sleeve 21; one end of the pushing spring 17 is limited by the end face of the positioning step of the positioning force transmission piece 15, and the other end of the pushing spring is limited by the end face of the cutting knife radial pushing piece 23 and is arranged on a spring positioning column of the positioning force transmission piece 15; the T-shaped end of the connecting rod 19 is inserted into a positioning column of the positioning force transmission piece 15 and connected with the positioning force transmission piece 15 through a nut, and the other end of the connecting rod is connected with the cutting tool radial pushing piece 23 through a thread;
in the embodiment of the disclosure, a first tube 18 axially connected is further arranged between the cutting unit 2 and the secondary axial pushing resetting unit 1, the cutting unit 2 is further provided with a second tube 24, and a positioning sleeve 21 and a pin 22 are coaxially arranged at the joint of the second tube 24 and the first tube 18; the first return spring 16 is sleeved between the secondary shaft push return unit 1 and the positioning sleeve 21. The positioning sleeve 21 is arranged in the first pipe body 18 and fixed at the threaded end face of the second pipe body 24 through the first return spring 16, and pin holes are formed in two sides of the positioning sleeve; the cutting blade radial pushing piece 23 penetrates through the positioning sleeve 21 and is fixed on the positioning sleeve 21 through a preferable shearable pin 22, one end of the cutting blade radial pushing piece is connected with the connecting rod 19, and the other end of the cutting blade radial pushing piece is in contact with the cutting blade 27; the cutter 27 is fixed on the second tube 24 through a pin 26 and is contracted in the lower outer tube through a second return spring 25;
in the disclosed embodiment, the cutting blade radial push 23 includes a cylindrical base and a conical diameter-enlarging member arranged in the axial direction, the conical diameter-enlarging member being a cone having an outer diameter gradually increasing from the end portion to the root portion.
In the embodiment of the present disclosure, the cutting blade 27 is composed of a plurality of blades hinged on the inner wall of the second tube 24, and the position corresponding to the cutting blade 27 is opened on the second tube 24; the cutter bodies are parts of which the cutting tool holder 271 and the cutting tool bit 272 are not on the same straight line, the cutter bodies are arranged back to back towards the axis at the position of the cutting tool bit 272, and the cutting tool bit is uniformly provided with cutting edges 273 along the side surface. For example, as can be seen from the structure of the cutting blade 27 in fig. 5 and the actual installation diagram in fig. 1, the cutting blade 27 of the present invention is formed like an "X" shape, and when the cutting blade radial pushing member 23 is engaged, the cutting blade radial pushing member 23 axially spreads the cutting blade 27 radially in a radial direction during a primary axial movement, so that the cutting edge 273 is exposed, and the cutting blade 27 is engaged with the drill rod rotating axially to perform circumferential cutting of the drill rod; the first-stage rack 111 and the positioning tooth key 151 of the positioning force transmission piece 15 are axially clamped to move along with the second-stage axial movement, so that the cutting knife 27 can be radially expanded, and the first return spring 16 can drive the cutting knife radial pushing piece 23, the rear pusher 14 and the positioning force transmission piece 15 to axially contract only when the cutting knife 27 is completely expanded due to the fact that the length of the second-stage rack 112 of the second-stage ratchet positioning tube 11 is lengthened, so that the positioning tooth key 151 of the positioning force transmission piece 15 is recycled to the first-stage rack 111, the radial expansion of the cutting knife 27 is relieved, and the cutting knife 27 is driven to reset by the second return spring 25.
In the embodiment of the disclosure, a centering guide unit 3 is further arranged in axial connection with the cutting unit 2, the centering guide unit 3 includes a guide head 31 and a centering sleeve 32 sleeved outside the guide head 31, and the outer diameters of the centering sleeve 32 are both larger than the outer diameter of the cutting unit 2 and the outer diameter of the secondary axial-thrust restoring unit 1. The guide head 31 plays a role in guiding the displacement of the whole structure, and the large-diameter centering sleeve 32 protects the second pipe body, the first pipe body and the second-stage ratchet wheel positioning pipe at the rear part.
By the structure, the ratchet wheel type secondary positioning sleeve milling drill rod inner cutter has the following effects:
(1) after the ratchet wheel type secondary positioning sleeve milling drill rod inner cutter is installed in place, the pusher 14 is pushed by high-pressure water to drive the positioning force transmission piece 15 to move axially, the first return spring 16 and the pushing spring 17 push the cutting knife radial pushing piece 23 to cut off the pin 22, and the cutting knife 27 is pushed out of the second pipe body 24; stopping the high-pressure water, and clamping the positioning force transmission piece 15 on the primary rack 111 of the secondary ratchet positioning pipe 11; the low-pressure water is opened, the inner cutter is rotated, the cutting knife radial pushing piece 23 pushes the cutting knife 27 to rotate around the pin shaft 26 under the action of the pushing spring 17, the cutting edge is opened, and the sleeve milling drill rod is cut; after the cutting is finished, high-pressure water is opened, the positioning force transmission piece 15 passes through the secondary rack 112 of the secondary ratchet positioning pipe 11 to reset and drives the connecting rod 19 and the cutting knife radial pushing piece 23 to reset, and the cutting knife 27 retracts into the second pipe body 24 under the action of the second reset spring 25;
(2) the cylinder needle of the throttle needle 2 is inserted into the inner hole of the pusher 14, and has the function of opening the cutter 27 to report;
(3) the two-stage ratchet wheel positioning structure design of the two-stage ratchet wheel positioning pipe 11 can enable the positioning force transmission piece 15 to reset only after the cutting knife is completely opened, so that the normal construction of the inner cutter is ensured.
The foregoing description and description are by way of example only and are not intended to limit the present disclosure, application, or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention will include any embodiments falling within the foregoing description and the appended claims.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (6)
1. A ratchet wheel type secondary positioning sleeve milling drill rod inner cutter is characterized in that a secondary shaft pushing reset unit (1) and a cutting unit (2) are sequentially arranged along the axial direction, the cutting unit (2) is provided with a cutting knife radial pushing piece (23) along the axial direction, and a cutting knife (27) is arranged in axial contact with the cutting knife radial pushing piece (23);
the first-stage axial motion of the second-stage axial pushing resetting unit (1) drives the cutting knife radial pushing piece (23) to axially move so that the cutting knife (27) is radially opened; the secondary axial movement of the secondary axial pushing resetting unit (1) drives the axial movement of the cutting knife radial pushing piece (23) to reset the cutting knife (27);
the two-stage axial-pushing reset unit (1) is axially provided with a two-stage ratchet wheel positioning pipe (11), a plurality of racks are arranged at intervals along the circumferential direction at the axial moving end of the two-stage ratchet wheel positioning pipe (11), each rack is composed of a first-stage rack (111) and a second-stage rack (112), the width of each first-stage rack (111) is 2 times that of each second-stage rack (112), and the height of each second-stage rack (112) is greater than that of each first-stage rack (111); a pusher (14) and a positioning force transmission piece (15) are sequentially embedded in the secondary ratchet wheel positioning tube (11) along the axial direction, the pusher (14) and the positioning force transmission piece (15) are clamped along the axial direction, and a plurality of positioning toothed keys (151) are arranged on the outer wall of the positioning force transmission piece (15); the positioning tooth key (151) is axially clamped and positioned with the primary rack (111) or the secondary rack (112) of the secondary ratchet positioning tube (11); a spring positioning column (152) is axially arranged at the end part of the positioning force transmission piece (15), and a pushing spring (17) is sleeved on the spring positioning column (152); the spring positioning column (152) is in shaft connection with the cutting knife radial pushing piece (23);
a first pipe body (18) in axial connection is further arranged between the cutting unit (2) and the secondary shaft-push resetting unit (1), a second pipe body (24) is further arranged on the cutting unit (2), and a positioning sleeve (21) and a pin (22) are coaxially arranged at the joint of the second pipe body (24) and the first pipe body (18); a first return spring (16) is sleeved between the secondary shaft pushing return unit (1) and the positioning sleeve (21);
one end of the first return spring (16) is limited by the cross section of the bottom of the step of the positioning force transmission piece (15), and the other end is limited by the positioning sleeve (21); one end of the pushing spring (17) is limited by the end face of the positioning step of the positioning force transmission piece (15), and the other end of the pushing spring is limited by the end face of the cutting knife radial pushing piece (23);
after the ratchet wheel type secondary positioning sleeve milling drill rod inner cutter is installed in place, the pusher (14) is pushed by high-pressure water to drive the positioning force transmission piece (15) to move axially, the first return spring (16) and the pushing spring (17) push the cutting knife radial pushing piece (23) to cut off the pin (22), and the cutting knife (27) is pushed out of the second pipe body (24); stopping high-pressure water, and clamping the positioning force transmission piece (15) on the primary rack (111) of the secondary ratchet positioning pipe (11); when low-pressure water is opened, the cutting blade radial pushing piece (23) pushes the cutting edge of the cutting blade (27) to be opened under the action of the pushing spring (17), and the drill rod is cut and milled.
2. A ratchet type secondary positioning milling drill pipe inner cutter according to claim 1, characterized in that the power of the secondary shaft-push resetting unit (1) is from high-pressure water;
and the movement direction of the primary axial movement is the same as that of the secondary axial movement.
3. The ratchet type secondary positioning milling drill stem inner cutter is characterized in that the pusher (14) is a cylindrical component, a plurality of positioning keys (141) are arranged on the outer wall of the pusher (14), and a plurality of positioning teeth (142) are arranged on one end edge of the pusher (14);
a throttle needle (12) is inserted into the inner wall of the pusher (14).
4. A ratchet-type secondary positioning trepanning drill pipe inner cutter according to claim 1 or 2, characterized in that the cutting blade radial pushing member (23) comprises a cylindrical base and a conical expanding member which are arranged along the axial direction, and the conical expanding member is a cone with the outer diameter gradually increasing from the end part to the root part.
5. A ratchet type secondary positioning sleeve milling inner drill rod cutter as claimed in claim 1 or 2, characterized in that the cutting blade (27) is composed of a plurality of cutter bodies hinged on the inner wall of the second tube body (24), and the position corresponding to the cutting blade (27) is opened on the second tube body (24);
the cutter body be cutting handle of a knife (271) and cutting tool bit (272) not on collinear part, a plurality of cutter bodies are in cutting tool bit (272) department and set up back to back towards the axle center, the tool bit evenly set up cutting edge (273) along the side.
6. The ratchet type secondary positioning sleeve milling drill rod inner cutter is characterized in that a centering guide unit (3) is further arranged in axial connection with the cutting unit (2), the centering guide unit (3) comprises a guide head (31) and a centering sleeve (32) sleeved outside the guide head (31), and the outer diameter of the centering sleeve (32) is larger than that of the cutting unit (2) and that of the secondary axial-pushing resetting unit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010191497.5A CN111322027B (en) | 2020-03-18 | 2020-03-18 | Ratchet type two-stage positioning sleeve milling drill rod inner cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010191497.5A CN111322027B (en) | 2020-03-18 | 2020-03-18 | Ratchet type two-stage positioning sleeve milling drill rod inner cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111322027A CN111322027A (en) | 2020-06-23 |
| CN111322027B true CN111322027B (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010191497.5A Active CN111322027B (en) | 2020-03-18 | 2020-03-18 | Ratchet type two-stage positioning sleeve milling drill rod inner cutter |
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| CN (1) | CN111322027B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3713481A (en) * | 1971-09-03 | 1973-01-30 | Houston Eng Inc | Well pipe swage |
| RU2270316C1 (en) * | 2004-08-19 | 2006-02-20 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Device to increase bore diameter in open wells and inner pipe diameter in cased wells |
| CN206144472U (en) * | 2016-11-16 | 2017-05-03 | 长江大学 | Rotatory fluid pressure type reamer that resets |
| CN107387011A (en) * | 2017-08-02 | 2017-11-24 | 西南石油大学 | Waterpower promotes the downhole tool for realizing continuous cutting different-diameter sleeve pipe |
| CN207144884U (en) * | 2017-08-24 | 2018-03-27 | 四川赛泰克能源科技有限公司 | One kind is oriented to internal cutting segmentation junk mill |
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2020
- 2020-03-18 CN CN202010191497.5A patent/CN111322027B/en active Active
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| CN111322027A (en) | 2020-06-23 |
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