CN101701507B - Underreamer with extrusion and wall-expansion functions - Google Patents
Underreamer with extrusion and wall-expansion functions Download PDFInfo
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- CN101701507B CN101701507B CN200910216026.9A CN200910216026A CN101701507B CN 101701507 B CN101701507 B CN 101701507B CN 200910216026 A CN200910216026 A CN 200910216026A CN 101701507 B CN101701507 B CN 101701507B
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- mandrel
- reamer
- hole
- hinged
- support
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Abstract
The invention relates to an underreamer with extrusion and wall-expansion functions, solving the problem that the traditional underreamer does not have wall-protection function and is easy to ream a hole oblately when a hole at a drilling bending section is reamed. A joint (1) is fixedly connected with the front ends of a mandrel (8) and an underreamer shell (6); the rear end of the underreamer shell (6) is provided with a supporting plate; the underreamer shell (6) is fixedly connected with the mandrel (8); a central sleeve (20) of a bracket (16) is in axial movable fit with a polyhedron on the mandrel (8) and is fixed on the mandrel (8) by a bolt or/and a positioning pin; a spoke or a wheel disc of the bracket (16) and the supporting plate are respectively hinged on both ends of a plurality of roller shafts which are in movable fit with rollers; and the rear end of the mandrel (8) is connected with an engaging lug (11).
Description
Technical field:
The present invention is relevant with the bore expanded hole device of no-dig technique horizontal directional drilling pipelayer attachment.
Background technology:
In no-dig technique horizontal directional drilling pipe laying, bore expanded hole device as shown in Figure 1 is generally used to soft formation bore expanded hole.
In this device, the joint 1 of reamer left end adopts with borer drill rod and is threaded, and has hydrophthalmia 2 to be communicated with reaming body water route in joint 1.Reaming body is made up of with inner casing 5 baffle plate 4,9 and shell 6, and on its shell 6, welding-on has some cutting elements 3, and has hydrophthalmia 7.Joint 1 and mandrel 8, engaging lug 11 coaxial line are welded to connect, and whole reaming body also adopts welding to be connected with shafting components, and with gusset 10 reinforcement.
When the rotary torque that drilling rod is applied by rig and axial pull-back force drive, drive reamer rotating-milling to expand hole wall and also move right; The engaging lug 11 of reamer left end adopts bolt pin joint with the dynamic ear of single acting connector, and leads drilling rod or finished product pipeline to enter the boring after expansion by single acting connector.
The shape of this kind of reamer body commonly uses taper, spindle or bullet-headed, and the cutting element mainly through it is installed carrys out rotating-milling and expands hole wall.Their ubiquity shortcomings are: 1. reamer self does not possess guidance capability, no-dig technique horizontal directional drilling pipe laying serpentine track boring or drilling track bending section carry out reaming work, can produce and inclined problem is expanded in hole; 2. reamer self only have cut broken hole wall make boring expansion capability, and do not possess protection hole wall retaining capacity.
Summary of the invention:
The object of this invention is to provide a kind of reamer can protecting hole wall, another object of the present invention is that hole can not be expanded partially by reamer.
The present invention is achieved in that
The reamer of band extruding retaining wall function, joint 1 is connected with the front end of mandrel 8 and the front end of reamer housing 6, there is support plate the rear end of reamer housing 6, reamer housing and mandrel are connected, the center 20 of support 16 joins merga pass bolt or/and alignment pin is fixed on mandrel with the polyhedron on mandrel 8 is axially dynamic, the spoke of support 16 or wheel disc and support plate are hinged with some roller shaft two ends respectively, and roller shaft coordinates with roller is dynamic, and mandrel 8 rear end is connected with engaging lug 11.
Roller shaft two ends are connected with roller 14 by bearing 13, there is gland 15, the inwall of support 16 center 20 is regular hexahedron, with the regular hexahedron of its dynamic its profiling of mandrel Duan Weiyu coordinated, locknut is passed through in one end of support 16, the other end is fixed on mandrel by positioning sleeve 17 and alignment pin 21, the hole of the hole of roller shaft right-hand member and the first hinged bearing 27 is hinged by the first bearing pin 26, first hinged bearing 27 is connected with support plate, the hole of the hole of roller shaft left end and the second hinged bearing 23 is hinged by the second bearing pin 24, second hinged bearing 23 has the dovetail groove of dovetail slide block and support 16 to be slidably connected.
Have guide head 12 between joint 1 and reamer housing 6 front end, guide head is the straight tube with mandrel 8 coaxial line, and its two ends are connected with joint 1 and reamer housing 6 respectively, and its outer wall has some axial ribs 28.
The diameter of guide head is less than the diameter of pilot hole or reamer housing forward end.
Structure of the present invention is simple, easy to operate, reamer self is made to have guidance capability and extruding retaining capacity, enable the serpentine track boring or the drilling track bending section reaming operating mode that adapt to no-dig technique horizontal directional drilling pipe laying better, borehole wall-protection ability when hole can not be expanded partially and greatly can improve reaming in soft formation.
Accompanying drawing illustrates:
Fig. 1 is existing reamer structure chart.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is structure chart of the present invention.
Fig. 4 is the partial enlarged drawing of Fig. 3.
Fig. 5 is the A direction view of Fig. 4.
Detailed description of the invention:
Primary structure of the present invention added a guide head 12 before the reaming body of reamer, adds the hole wall squeezing roller 14 of a set of adjustable diameter after reaming body.
The present invention primarily of guide head, reaming head and reducing hole wall pressurizing unit three part composition (accompanying drawing 2), Each part and function declaration as follows:
Guide head forms primarily of joint 1 and guide head 12.Joint 1 right-hand member has screw thread, and for being connected with drilling rod, left end welds with guide head and mandrel 8 or is threaded.Guide head external surface is provided with some wear-resisting ribs 28, and its diameter is slightly less than pilot hole or counter bore diameter, for correcting reaming head movement locus.Guide head left end welds with reamer housing 6 right-hand member and mandrel 8.
Reaming head is primarily of compositions such as reamer housing 6, reaming fin 22 and cutting elements 3.The some reaming fins 22 of welding-on on reamer housing 6, some cutting elements 3 of welding-on again on reaming fin 22, are mainly used in cutting broken hole wall ground.Reamer housing 6 also has some hydrophthalmias 7, for deriving the drill-in fluid of the hydrophthalmia 2 on mandrel 8, reamer being cooled and rinses.
Reducing hole wall pressurizing unit forms primarily of roller 14, support 16, positioning sleeve 17 and locknut 18,19.The little axle two ends of roller 14 are separately installed with rolling bearing (or sliding bearing) 13, and have gland 15 seal lubrication.Before the support plate below that the two ends of the little axle of roller adopt hinged bearing to be arranged on reamer housing 6 respectively and support 16.As shown in Figure 3, the hole of roller little axle right-hand member and the hole of hinged bearing 27 are worn together hinged by bearing pin 26, and after hinged bearing 27 and reamer housing, support plate is connected, and the hole of roller little axle left end and the hole of hinged bearing 23 are hinged by bearing pin 24.Hinged bearing 23 adopts the dovetail groove of dovetail slide block and support 16 to be slidably connected (see accompanying drawing 4).During reamer work, roller, both with reaming head and support revolution, around little axle rotation, with rolling extrusion hole wall, can reduce extrusion friction power again greatly.Support 16 is spoke-like (spoke quantity is equal with number of rollers) or wheel plate-like, its center inwall is six sides (or other polygons), be arranged on correspondence six side (or other polygon) position of mandrel 8, for the moment of torsion of reliable drive mandrel 8.Support 16 can slide axially along mandrel 8, thus can according to the maximum roll extrusion diameter of layer compression adjustment roller set.During adjustment, by changing the axial location of positioning sleeve 17 on mandrel 8, and sell the some locating holes in centering spindle 8 by shop bolt 21 and locate.After positioning sleeve 17 is located, locknut 18 and locknut 19 is adopted to be fixed on mandrel 8 by support 16.
The engaging lug 11 of reamer left end is for connecting transfer gear and drilling rod (or finished product pipeline).
Claims (3)
1. the reamer of band extruding retaining wall function, it is characterized in that joint (1) is connected with the front end of mandrel (8) and the front end of reamer housing (6), there is support plate the rear end of reamer housing (6), reamer housing and mandrel are connected, the center (20) of support (16) joins merga pass bolt or/and alignment pin is fixed on mandrel with the polyhedron on mandrel (8) is axially dynamic, the spoke of support (16) or wheel disc and support plate are hinged with some roller shaft two ends respectively, roller shaft coordinates with roller is dynamic, mandrel (8) rear end is connected with engaging lug (11), roller shaft two ends are connected with roller (14) by bearing (13), there is gland (15), the inwall of the center (20) of support (16) is regular hexahedron, with the regular hexahedron of its dynamic its profiling of mandrel Duan Weiyu coordinated, locknut is passed through in one end of support (16), the other end is fixed on mandrel by positioning sleeve (17) and alignment pin (21), the hole of the hole of roller shaft right-hand member and the first hinged bearing (27) is hinged by the first bearing pin (26), first hinged bearing (27) and support plate are connected, the hole of the hole of roller shaft left end and the second hinged bearing (23) is hinged by the second bearing pin (24), second hinged bearing (23) has the dovetail groove of dovetail slide block and support (16) to be slidably connected.
2. reamer according to claim 1, it is characterized in that there is guide head (12) between joint (1) and reamer housing (6) front end, guide head is the straight tube with mandrel (8) coaxial line, its two ends are connected with joint (1) and reamer housing (6) respectively, and its outer wall has some axial ribs (28).
3. reamer according to claim 2, is characterized in that the diameter of guide head is less than the diameter of pilot hole or reamer housing forward end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910216026.9A CN101701507B (en) | 2009-10-30 | 2009-10-30 | Underreamer with extrusion and wall-expansion functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910216026.9A CN101701507B (en) | 2009-10-30 | 2009-10-30 | Underreamer with extrusion and wall-expansion functions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101701507A CN101701507A (en) | 2010-05-05 |
| CN101701507B true CN101701507B (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910216026.9A Active CN101701507B (en) | 2009-10-30 | 2009-10-30 | Underreamer with extrusion and wall-expansion functions |
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| Country | Link |
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| CN (1) | CN101701507B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437711B (en) * | 2013-09-10 | 2017-01-11 | 朱卫江 | reamer |
| CN105298395B (en) * | 2015-11-21 | 2017-09-15 | 北京通成工业设备有限公司 | No-dig technique reamer |
| CN107182373A (en) * | 2017-08-01 | 2017-09-22 | 北京林业大学 | Plant seedlings centrifugal diameter changing drilling tool in the rock of stony desert area |
| CN114542798B (en) * | 2022-01-27 | 2022-09-02 | 湖北省工业建筑集团有限公司 | Integral type drilling reaming device is used in construction of DN1200HDPE major diameter non-excavation dilatory pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB351076A (en) * | 1930-01-25 | 1931-06-25 | Grant John | Improvements in reamers or underreamers |
| US4227586A (en) * | 1978-05-08 | 1980-10-14 | Grey Bassinger | Roller reamer apparatus |
| US4693328A (en) * | 1986-06-09 | 1987-09-15 | Smith International, Inc. | Expandable well drilling tool |
| US5497842A (en) * | 1995-04-28 | 1996-03-12 | Baker Hughes Incorporated | Reamer wing for enlarging a borehole below a smaller-diameter portion therof |
| GB2313860A (en) * | 1996-06-06 | 1997-12-10 | Paul Bernard Lee | Reamer with radially adjustable rollers |
| CN1469964A (en) * | 2000-10-12 | 2004-01-21 | �����ĵ� | A drilling tool used in horizontal drilling applications |
-
2009
- 2009-10-30 CN CN200910216026.9A patent/CN101701507B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB351076A (en) * | 1930-01-25 | 1931-06-25 | Grant John | Improvements in reamers or underreamers |
| US4227586A (en) * | 1978-05-08 | 1980-10-14 | Grey Bassinger | Roller reamer apparatus |
| US4693328A (en) * | 1986-06-09 | 1987-09-15 | Smith International, Inc. | Expandable well drilling tool |
| US5497842A (en) * | 1995-04-28 | 1996-03-12 | Baker Hughes Incorporated | Reamer wing for enlarging a borehole below a smaller-diameter portion therof |
| GB2313860A (en) * | 1996-06-06 | 1997-12-10 | Paul Bernard Lee | Reamer with radially adjustable rollers |
| CN1469964A (en) * | 2000-10-12 | 2004-01-21 | �����ĵ� | A drilling tool used in horizontal drilling applications |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101701507A (en) | 2010-05-05 |
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