CN102505918A

CN102505918A - Rotary dragging reaming device

Info

Publication number: CN102505918A
Application number: CN2011103510464A
Authority: CN
Inventors: 祝效华; 蒋俊; 贾彦杰
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2011-11-09
Filing date: 2011-11-09
Publication date: 2012-06-20

Abstract

The invention relates to a rotary dragging reaming device which can accomplish reaming and pipe back dragging processes in one step in horizontal directional crossing constructions. The rotary dragging reaming device employs a technical scheme as follows: the rotary dragging reaming device mainly comprises a drill stem, a bearing group, a reamer, a connector, and the like, wherein the front end of the reamer is in threaded connection with the drill stem, and the rear end of the reamer is in clearance fit with the connector; a rib plate is arranged in the connector, and assembled together with the drill stem through the bearing group; an outer shell and an inner shell are arranged at the rear end of the connector, and are connected with a product pipe and a debris discharge pipe through fastening devices respectively; hollowed-out long holes and cutting teeth are arranged on the cutting surface of the reamer; mud nozzles are formed on the cutting surface and the rear end face of the reamer; annular debris flow enters the inside of the connector through the hollowed-out long holes, and then is discharged to a mud sump through the debris discharge pipe. The rotary dragging reaming device disclosed by the invention can avoid hole collapse caused by large diameter ratio of a pre-reamed hole to the pipe, realize accurate mounting of product pipes, reduce back dragging force, save construction time and cost, and protect the environment.

Description

Counterboring apparatus is drawn in a kind of rotation

Technical field

The present invention relates to a kind of horizontal orientation crossing construction that is used for, disposable completion reaming and pipeline return the dilatory Counterboring apparatus of the rotation of dragging two technologies.

Background technology

Trenchless technology be meant do not excavate or the condition of few excavating earth surface under lay, change or repair the construction technique of various underground utilities, claim TT (Trenchless Technology) or N-Dig abroad, be an important ingredient of drilling project.As an emerging pipeline no-excavation construction method, orientation drills more with numerous advantages such as its accurate guiding, short construction period, overall efficiency height, in the construction of relevant industries pipe-lines such as natural gas, has obtained extensive use.The directional drilling technology has following characteristics as a kind of no-excavation construction method of preferential selection: (1) is to traffic, environment damage and disturb little; (2) but all-weather construction almost, construction safety, efficient; (3) efficient is high, and integrated cost is low, and man-hour is few; (4) construction plant is required height, layer of gravel constructional difficulties.It is widely used in pipe installation and the occasions such as conduit laying of electric power and telecommunication cable of oil, natural gas, tap water, sewage and other fluid in river crossing and water channel, street, speedway, railway, airfield runway, seabeach, island, building crowded places, pipeline passway and canal etc.

, the horizontal orientation of routine generally all to carry out repeatedly reaming in passing through; The final aperture of being expanded generally will reach 1.5 times (as when the product pipeline external diameter is 30 cun, the final aperture of adopting conventional reaming just to need to be expanded is 45 cun) of product pipeline external diameter, so need carry out repeatedly reaming; When the aperture is excessive, cause in the hole easily and cave in; Make complex situations such as piling up ground formation bit freezing in the hole, hinder further construction, even might let the construction in early stage scrap fully; Need repeatedly hole flushing behind the bit freezing, not only lose time but also increase construction cost.In addition, return when dragging because the buoyancy product pipeline can float, and pipeline and hole wall produce very big friction when buoyancy is very big, hinder pipeline and return when dragging, also can influence hole wall and stablize at pipeline.

When adopting conventional chambering process; Because the deadweight of reamer and drilling rod will cause the aperture line to sink, and finally cause into hole shape and become pear shape; Pipeline returns and drags track and initial designs eyelet track to differ greatly, and can not guarantee that the product pipeline and the hole of designing have preferably to neutrality.Usually, the mud of band smear metal all is to carry out mud through the outer annular space between drilling rod and the hole wall to efflux, and is difficult to reclaim mud with special-purpose retracting device, therefore causes environment pollution.

Summary of the invention

The objective of the invention is: pass through the hole that is prone to collapse for solving the heavy caliber orientation, return and drag the big and mud of frictional resistance to efflux problems such as contaminated environment, specially propose a kind of reaming and return the rotation of dragging two disposable completion of technology with pipeline and draw Counterboring apparatus.

In order to achieve the above object, the present invention solves the technical scheme that this technical problem adopts and is: Counterboring apparatus is drawn in a kind of rotation, mainly comprises drilling rod 1, reamer 3, bearing group 6 and connector 5; Reamer 3 comprises manifold 18, connects panel 11, hollow out slotted hole 10, cutting teeth 9, wear washer 24, slurry channel 25, radially mud nozzle 26 and axial mud nozzle 12; Connector 5 comprises connector shell body 30, connector inner housing 22, floor 17, bearing support 31, gasket seal 32, sealing ring 19 and end cap 16; It is characterized in that: drilling rod 1 end is equipped with bearing group 6, and staggered mud hole 27 is arranged on the drilling rod wall of drilling rod inner chamber 29 ends; Reamer front end 2 links together through screw thread 28 with drilling rod 1, and reamer rear end 4 and connector 5 matched in clearance can be rotated each other, between reamer rear end 4 and connector 5 sections of cooperation wear washer 24 is arranged; Connector 5 built-in floors 17, floor 17 is welded in the connector 5; Connector 5 is assemblied on the drilling rod 1 with bearing group 6 through floor 17, bearing support 31, and bearing group 6 leans on end cap 16, the shaft shoulder 21 and nut 23 fixing, and end cap 16 is fixed on the bearing support 31 by bolt group 14; Between end cap 16 and the drilling rod 1 by between sealing ring 19 sealing, end cap 16 and the bearing support 31 by gasket seal 32 sealings; Connector rear end 15 has connector shell body 30 and connector inner housing 22, links to each other with chip removal pipeline 8 with product pipeline 7 through tightening device 20 respectively, and tightening device 20 adopts bolt or latch structure, and chip removal pipeline 8 passes through from product pipeline 7 inside; There are radially mud nozzle 26, reamer rear end 4 have in axial mud nozzle 12, the housing on reamer 3 cutting faces slurry channel 25 is arranged, drilling rod inner chamber 29, mud hole 27, manifold 18, slurry channel 25 and radially mud nozzle 26 and annular space inside and outside axially the passage that forms of mud nozzle 12 is connected.Each row group is provided with radially that mud nozzle 26 has 4～6 on reamer 3 cutting faces, and wherein being provided with radially on the corresponding connection panel 11 of each row group, the quantity of mud nozzle 26 is 1～2.

Major advantage of the present invention: the installation accuracy that 1. can guarantee product pipeline; 2. carry out the horizontal orientation crossing construction with this device and can shorten the engineering time and practice thrift construction cost, particularly can shorten the half the duration for bigbore pipeline construction; 3. can collect the mud of cutting carring through the chip removal pipeline, play the effect of protection environment.

Description of drawings

Fig. 1 is a kind of scheme of installation that rotates dilatory Counterboring apparatus of the present invention;

Fig. 2 is a kind of outside drawing that rotates dilatory Counterboring apparatus of the present invention;

Fig. 3 is a kind of reamer front elevation drawing that rotates dilatory Counterboring apparatus of the present invention;

Fig. 4 is a kind of sectional view that rotates dilatory Counterboring apparatus of the present invention.

Among the figure: 1. drilling rod, 2. reamer front end, 3. reamer, 4. reamer rear end, 5. connector, 6. bearing group, 7. product pipeline; 8. chip removal pipeline, 9. cutting teeth, 10. hollow out slotted hole, 11. connect panels, 12. axial mud nozzles, 13. mud flow arrows, 14. bolt groups; 15. connector rear end, 16. end caps, 17. floors, 18. manifolds, 19. sealing rings, 20. tightening devices; 21. the shaft shoulder, 22. connector inner housings, 23. nuts, 24. wear washer, 25. slurry channels, 26. mud nozzles radially; 27. the mud hole, 28. screw threads, 29. drilling rod inner chambers, 30. connector shell bodies, 31. bearing supports, 32. gasket seals.

The specific embodiment

According to Fig. 1～shown in Figure 4, Counterboring apparatus is drawn in a kind of rotation, mainly comprises drilling rod 1, reamer 3, bearing group 6 and connector 5; Reamer 3 comprises manifold 18, connects panel 11, hollow out slotted hole 10, cutting teeth 9, wear washer 24, slurry channel 25, radially mud nozzle 26 and axial mud nozzle 12; Connector 5 comprises connector shell body 30, connector inner housing 22, floor 17, bearing support 31, gasket seal 32, sealing ring 19 and end cap 16; It is characterized in that: drilling rod 1 end is equipped with bearing group 6, and staggered mud hole 27 is arranged on the drilling rod wall of drilling rod inner chamber 29 ends; Reamer front end 2 links together through screw thread 28 with drilling rod 1, and reamer rear end 4 and connector 5 matched in clearance can be rotated each other; Between reamer rear end 4 and connector 5 sections of cooperation wear washer 24 is arranged, can effectively stop the inside and outside Gap Flow of mud between reamer 3 and connector 5, and can effectively alleviate reamer 3 and the wearing and tearing of connector 5 when relatively rotating.Connector 5 built-in floors 17, floor 17 is welded on the connector 5; Connector 5 is assemblied on the drilling rod 1 with bearing group 6 through floor 17, bearing support 31, and bearing group 6 is fixing by end cap 16, the shaft shoulder 21 and nut 23, and end cap 16 is through on bolt group 14 fixed bearing blocks 31; By sealing by gasket seal 32 between sealing ring 19 sealings, end cap 16 and the bearing support 31, quicken bearing wear between end cap 16 and the drilling rod 1 with the cutting grain that prevents to return in the mud; Connector rear end 15 has connector shell body 30 and connector inner housing 22, links to each other with chip removal pipeline 8 with product pipeline 7 through tightening device 20 respectively, and tightening device 20 adopts bolt or latch structure, and chip removal pipeline 8 passes through from product pipeline 7 inside; There are radially mud nozzle 26, reamer rear end 4 have in axial mud nozzle 12, the housing on reamer 3 cutting faces slurry channel 25 is arranged; Drilling rod inner chamber 29, mud hole 27, manifold 18, slurry channel 25 are connected inside and outside annular space with the passage of radially mud nozzle 26 or axially mud nozzle 12 formation.

Guaranteeing under the safe and reliable condition of reamer 3 that ejection is sufficient takes the rock flow body, the quantity of mud nozzle 26 should be 4～6 to need on the cutting face each row group to be provided with radially, and wherein connecting on the panel 11 radially, the quantity of mud nozzle 26 is 1～2.In order to make drilling rod 1 that enough intensity arranged, the mud hole of on drilling rod 1, offering 27 should be staggered.

On reamer 3 cutting faces evenly distribution hollow out slotted hole 10, connect panel 11, cutting teeth 9 and mud nozzle 26 radially, there is axial mud nozzle 12 reamer rear end 4; The slurry channel 25 that distributing in reamer 3 housings is communicated with radially mud nozzle 26 and axial mud nozzle 12.The mud that pumps into from ground is through the slurry channel 25 drilling rod inner chamber 29, mud hole 27, manifold 18 and the reamer 3, and final through radially mud nozzle 26 and axially mud nozzle 12 ejections, the mud flow that pumps into is like mud flow arrow 13 among the figure.Mainly reamer cutting teeth 9 is cleaned from the mud of radially mud nozzle 26 ejections, prevent to produce mud drum, and cutting carring; From the mud of axial mud nozzle 12 ejections is that product pipeline 7 provides buoyancy, lubricated duct peace weighing apparatus strata pressure.The mud of band smear metal gets into reamer 3 through the slotted hole 10 of hollow out, and is discharged to the ground mud pit through connector 5, chip removal pipeline 8, realizes chip removal in the pipe.

Claims

1. the dilatory Counterboring apparatus of rotation mainly comprises drilling rod (1), bearing group (6), reamer (3) and connector (5); Reamer (3) comprises manifold (18), connects panel (11), hollow out slotted hole (10), cutting teeth (9), wear washer (24), slurry channel (25), radially mud nozzle (26) and axial mud nozzle (12); Connector (5) comprises connector shell body (30), connector inner housing (22), floor (17), bearing support (31), gasket seal (32), sealing ring (19) and end cap (16); It is characterized in that: drilling rod (1) end is equipped with bearing group (6), on the drilling rod wall of drilling rod inner chamber (29) end staggered mud hole (27) is arranged; Reamer front end (2) and drilling rod (1) link together through screw thread (28), and reamer rear end (4) and connector (5) matched in clearance can be rotated each other; The built-in floor of connector (5) (17), floor (17) is welded in the connector 5; Connector (5) is assemblied on the drilling rod (1) with bearing group (6) through floor (17), bearing support (31); Bearing group (6) leans on end cap (16), the shaft shoulder (21) and nut (23) fixing, and end cap (16) is fixed on the bearing support (31) by bolt group (14); Between end cap (16) and the drilling rod (1) by sealing by gasket seal (32) between sealing ring (19) sealing, end cap (16) and the bearing support (31); Connector rear end (15) has connector shell body (30) and connector inner housing (22), links to each other with chip removal pipeline (8) with product pipeline (7) through tightening device (20) respectively, and chip removal pipeline (8) passes through from product pipeline (7) inside; There is axial mud nozzle (12) reamer rear end (4); Have radially on reamer (3) cutting face and in mud nozzle (26), the housing slurry channel (25) is arranged, drilling rod inner chamber (29), mud hole (27), manifold (18), slurry channel (25) are connected inside and outside annular space with the passage of radially mud nozzle (26) and axially mud nozzle (12) formation.

2. Counterboring apparatus is drawn in rotation according to claim 1; It is characterized in that: each row group is provided with radially (26) 4～6 of mud nozzles on reamer (3) cutting face, and wherein each row is organized and had on the corresponding connection panel (11) radially that the quantity of mud nozzle (26) is 1～2.

3. Counterboring apparatus is drawn in rotation according to claim 1, it is characterized in that: between reamer rear end (4) and connector (5) section of cooperation wear washer (24) is arranged.

4. Counterboring apparatus is drawn in rotation according to claim 1, it is characterized in that: tightening device (20) adopts bolt or latch structure.