CN102900390B - Pressurized coring tool - Google Patents
Pressurized coring tool Download PDFInfo
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- CN102900390B CN102900390B CN201210445044.6A CN201210445044A CN102900390B CN 102900390 B CN102900390 B CN 102900390B CN 201210445044 A CN201210445044 A CN 201210445044A CN 102900390 B CN102900390 B CN 102900390B
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Abstract
The invention discloses a kind of pressurized coring tool, comprise pressure-bearing device, rotate assembly and core grabber composite member; Described pressure-bearing device comprises pressure-bearing assembly and pin part, and pressure-bearing assembly comprises pressure-bearing piston and is socketed in the pressure-bearing cover in pressure-bearing piston, and pin part comprises shear pin; Described rotation assembly comprises axle, and one end of axle is provided with whirligig, and the other end is provided with releasing pressure automatically assembly; Described core grabber composite member comprises adapter sleeve, clip seat, clip, adding pressure type core grabber and self-locking core grabber, clip seat one end is connected with the lower end of adapter sleeve, the other end is connected with adding pressure type core grabber, the upper end of adapter sleeve is connected with interior cartridge module, clip is arranged in clip seat, and self-locking core grabber is arranged in adding pressure type core grabber.The present invention is in the process of coring, and the inner core of pressurizing tool can rotate along with the rotation of drilling tool, solves the rock core entering inner core and holds breakable problem.
Description
Technical field
The present invention relates to a kind of pressurized coring tool, coring for oil and gas well drilling, belong to the design and manufacturing technology field of drilling and coring delivery instrument.
Background technology
In the drilling process implementing petroleum gas, in order to understand the oil-containing gas bearing condition of down-hole formation, usually according to the well depth of design, all to carry out drilling through construction to different layers position, underground rock core, in order to obtain good rock core, drilling through in rock core the coring tool just needing employing special.
According to the difference on stratum, the instrument of coring at present mainly comprises normal core-extracting tool and special coring tool, wherein normal core-extracting tool comprise self-locking coring tool and pressurized coring tool several; The patent No. is a kind of novel mechanical pressurized coring tool of CN200620149089.9, discloses a kind of coring tool using mechanical pressurization, mainly solves the problem that existing mechanical pressurization coring tool can not rinse inner core, troublesome poeration and poor reliability.Comprise six square sets, suspension joint, urceolus and drill bit and core gripper with slip, this instrument can clean inner core; An other patent No. is " a kind of Unconsolidated strata mechanical pressurizing-type closed coring tool " of CN200920244502.3.Disclose a kind of mechanical pressurization formula hermetic core taking tool for scall, mainly solve existing mechanical pressurization formula coring tool need repeatedly pitching, on carry drilling tool, by the large problem of Well Deflection Influence.Comprise six square bars, cut off be enclosed within six square sets with cut off hole overlap corresponding position several horizontal directions uniform, this Unconsolidated strata mechanical pressurizing-type closed coring tool have only need a pitching, do not use and carry drilling tool, by the little feature of Well Deflection Influence.The rock core that can obtain 9.2 meters long that these coring tools are the longest at present, yield rate can reach 60 more than %, has good effect of coring.
But the coring tool of these prior aries is when for the coring of broken formation at present, due to disintegration of core, become post poor, complicated operation reason, yield rate just not so satisfaction, main technical problem is that the pressurizing tool inner core of prior art can not rotate, therefore, when in the process of coring, when rock core enters the inner core of pressurizing tool, because drive inner cylinder rotating while urceolus rotates, static rock core and inner core produce relative rotary motion, cause fractureing until broken, and the rock core of fragmentation is owing to cannot correctly playback when going out the heart, just be difficult to obtain the truth that layer position is determined in underground after being got ground.
Summary of the invention
The object of the invention is to overcome existing coring tool in the problems referred to above for existing during the coring of broken formation, a kind of pressurized coring tool is provided, the present invention is in the process of coring, the inner core of pressurizing tool can rotate along with the rotation of drilling tool, solves the rock core entering inner core and holds breakable problem.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of pressurized coring tool, comprise six square bars, six square sets, urceolus short circuit, urceolus, difference short circuit, interior cartridge module and core bit, six square sets are connected with urceolus by urceolus short circuit, urceolus is connected with difference short circuit, difference short circuit is connected with core bit, it is characterized in that: also comprise pressure-bearing device, rotate assembly and core grabber composite member;
Described pressure-bearing device comprises pressure-bearing assembly and pin part, pressure-bearing assembly comprises pressure-bearing piston and is socketed in the pressure-bearing cover in pressure-bearing piston, pin part comprises shear pin, described pressure-bearing piston upper end is by the pressurizing adaptor place of pressure-bearing steel-ball limiting in six square sets, lower end is connected with rotation assembly, pressure-bearing cover is fixedly connected with pressure-bearing piston by shear pin, and pressure-bearing cover lower end is spacing on urceolus short circuit, and pressure-bearing piston upper end is provided with and the sand outlet of pressure-bearing piston inner space and runner;
Described rotation assembly comprises axle, and one end of axle is provided with whirligig, and the other end is provided with releasing pressure automatically assembly, and releasing pressure automatically assembly comprises steel ball seat and the pressure release steel ball for closed steel ball seat; The upper end of axle is connected with the lower end of pressure-bearing piston by whirligig, and lower end is connected with the upper end of interior cartridge module;
Described core grabber composite member comprises adapter sleeve, clip seat, clip, adding pressure type core grabber and self-locking core grabber, clip seat one end is connected with the lower end of adapter sleeve, the other end is connected with adding pressure type core grabber, the upper end of adapter sleeve is connected with interior cartridge module, clip is arranged in clip seat, and self-locking core grabber is arranged in adding pressure type core grabber.
Described pressure-bearing piston comprises and is provided with letting out sand body and being provided with the runner body of runner of sand outlet, and the external diameter of runner body is less than the external diameter letting out sand body, and lets out sand body between runner body and pressure-bearing piston body.
The described sand body and runner body and pressure-bearing piston let out is integral type structure.
Described pin part also comprises pressure-bearing baffle ring, and pressure-bearing baffle ring is fixedly connected with pressure-bearing piston, and the spacing step surface place on urceolus short circuit of pressure-bearing baffle ring.
Described sand outlet radial direction is arranged on lets out on sand body, and runner is axially disposed within runner body, and pressure-bearing piston is connected by runner with pressurizing adaptor.
Described runner is four and in groove shapes, four uniform flow passage are distributed on runner body.
Described sand outlet is three, is evenly distributed on and lets out on sand body.
The outer wall of described pressure-bearing piston is provided with the annular cotter way for being connected and fixed pressure-bearing cover, shear pin one end is connected in annular cotter way through pressure-bearing cover.
Described whirligig comprises bearing box, in bearing box, be provided with bearing, bearing box is provided with the link be connected with pressure-bearing piston lower end.
Axle in described bearing box is provided with semi-ring, semi-ring is axially provided with the back-up ring of stationary half, the side of bearing is by semi-ring and retainer ring spacing, and opposite side is spacing by the end of bearing box.
The link that described bearing box is connected with pressure-bearing piston lower end is internal thread button link, described releasing pressure automatically assembly is provided with the outside nut button link be connected with interior cartridge module.
Be provided with for the baffle plate to pressure release steel-ball limiting above the steel ball seat of described releasing pressure automatically assembly.
The outer wall of described adding pressure type core grabber is also provided with the seal coordinated with core bit inwall.
Described adapter sleeve one end is provided with inner circle screw thread, the other end is provided with cylindrical screw thread, clip seat one end is connected with adapter sleeve by cylindrical screw thread, and the clip seat other end is connected with adding pressure type core grabber by cylindrical screw thread, and clip is connected with clip seat by the inner circle screw thread on clip seat inwall.
Employing the invention has the advantages that:
One, in the present invention, described rotation assembly comprises axle, and one end of axle is provided with whirligig, and the other end is provided with releasing pressure automatically assembly, and releasing pressure automatically assembly comprises steel ball seat and the pressure release steel ball for closed steel ball seat; The upper end of axle is connected with the lower end of pressure-bearing piston by whirligig, lower end is connected with the upper end of interior cartridge module, rotation assembly is arranged in pressurized coring tool, in the process of coring, due to thrust ball bearing with flat seat effect, the inner core of pressurizing tool can rotate along with the rotation of drilling tool, solving prior art due to pressurizing tool inner core can not rotate, easily cause the problem of the disintegration of core entering inner core, and pressure release steel ball realizes pressure release when moving upward, realize when moving downward in steel ball seat closing, can prevent drilling fluid from entering inner core.
Two, in the present invention, described core grabber composite member comprises adapter sleeve, clip seat, clip, adding pressure type core grabber and self-locking core grabber, clip seat one end is connected with the lower end of adapter sleeve, the other end is connected with adding pressure type core grabber, the upper end of adapter sleeve is connected with interior cartridge module, clip is arranged in clip seat, self-locking core grabber is arranged in adding pressure type core grabber, self-locking core grabber due to core grabber composite member has the performance that self-locking becomes post rock core, and adding pressure type core grabber to have when pulling out of hole the rock core that extracted of support with the performance of slip-off preventing, so pass through the Combination application of self-locking core grabber and adding pressure type core grabber, in use, it is harder that self-locking core grabber plays crawl, become post good, the rock core effect that adding pressure type core grabber cannot capture, adding pressure type core grabber plays and guides into the heart, cut the heart and the effect of closed disintegrating rock core, thus the problem that broken formation can not capture rock core had both been solved, the good rock core of post is obtained into again by self-locking core grabber, achieve pressurized coring tool and both can obtain broken rock core, the good rock core of post can be obtained into again.
Three, in the present invention, described pressure-bearing device comprises pressure-bearing assembly and pin part, pressure-bearing assembly comprises pressure-bearing piston and is socketed in the pressure-bearing cover in pressure-bearing piston, pin part comprises shear pin, pressure-bearing steel-ball limiting is passed through in six square sets in described pressure-bearing piston upper end, lower end is connected with rotation assembly, pressure-bearing cover is fixedly connected with pressure-bearing piston by shear pin, pressure-bearing cover lower end is spacing on urceolus short circuit, pressure-bearing piston upper end is provided with and the sand outlet of pressure-bearing piston inner space and runner, pressure-bearing device solves existing pressurized coring tool wears pin damage urceolus performance problem from urceolus, shear pin can be cut off in pitching pressure process, inner core is moved down, and then make adding pressure type core grabber closed disintegrating rock core under the effect of drill bit inner chamber, the object not damaging outer tube structure and performance can be reached, avoid the pin that routine wears pin outwards to exit from pin hole simultaneously, block the situation that core barrel not easily goes out the heart.
Four, in the present invention, described pressure-bearing piston comprises and is provided with letting out sand body and being provided with the runner body of runner of sand outlet, the external diameter of runner body is less than the external diameter letting out sand body, and let out sand body between runner body and pressure-bearing piston body, by automatic leakage sand hole and runner, achieve releasing pressure automatically function, and adopt the operating efficiency and the reliability that this configuration has improved sand outlet and runner, thus ensure that and can implement releasing pressure automatically smoothly.
Five, in the present invention, described in let out sand body and runner body and pressure-bearing piston be integral type structure, be not only convenient to produce, and there is not sealing problem.
Six, sand outlet radial direction of the present invention is arranged on and lets out on sand body, and runner is axially disposed within runner body, adopts this structure to be convenient to let out sand and fluid is discharged by runner, improves the reliability of pressure release.
Seven, in the present invention, described runner is four and in groove shapes, four uniform flow passage are distributed on runner body, adopts the efficiency that this configuration has improved fluid and discharged by runner.
Eight, in the present invention, described sand outlet is three, is evenly distributed on and lets out on sand body, adopts this configuration has improved to let out sand efficiency.
Nine, in the present invention, the outer wall of described pressure-bearing piston is provided with the annular cotter way for being connected and fixed pressure-bearing cover, shear pin one end is connected in annular cotter way through pressure-bearing cover, and this structure further ensures pressurized coring tool can not damage urceolus performance when pin worn by urceolus.
Ten, in the present invention, described whirligig comprises bearing box, in bearing box, be provided with bearing, bearing box is provided with the link be connected with pressure-bearing piston lower end, adopts this structure not only to ensure that the reliability of rotation, and is convenient to be connected with upper tool.
11, in the present invention, axle in described bearing box is provided with semi-ring, semi-ring is used for the stable and anti-lost of axle, semi-ring is axially provided with the back-up ring of stationary half, the side of bearing is by semi-ring and retainer ring spacing, opposite side is spacing by the end of bearing box, adopts this structure to be convenient to install location, also easy disassembly.
12, in the present invention, the link that described bearing box is connected with pressure-bearing piston lower end is internal thread button link, described releasing pressure automatically assembly is provided with the outside nut button link be connected with interior cartridge module, adopt this structure, be convenient to the connection and the dismounting that rotate assembly and upper tool and lower tool.
13, in the present invention, the outer wall of described adding pressure type core grabber is also provided with the seal coordinated with core bit inwall, the sealing between adding pressure type core grabber and core bit inwall can be realized by the seal arranged, further ensure and both can obtain broken rock core, the good rock core of post can be obtained into again.
14, in the present invention, described adapter sleeve one end is provided with inner circle screw thread, the other end is provided with cylindrical screw thread, clip seat one end is connected with adapter sleeve by cylindrical screw thread, and the clip seat other end is connected with adding pressure type core grabber by cylindrical screw thread, and clip is connected with clip seat by the inner circle screw thread on clip seat inwall, by the mode of screwed connection, not only increase the packaging efficiency of pressurized coring tool, but also be convenient to the dismounting after coring, improve operating efficiency.
15, in the present invention, described pin part also comprises pressure-bearing baffle ring, pressure-bearing baffle ring is fixedly connected with pressure-bearing piston, and spacing step surface on urceolus short circuit, solve existing pressurized coring tool wears pin damage urceolus performance problem from urceolus, screw can be cut off in pitching pressure process, inner core is moved down, and then make adding pressure type core grabber closed disintegrating rock core under the effect of drill bit inner chamber, the object not damaging outer tube structure and performance can be reached, avoid the pin that routine wears pin outwards to exit from pin hole simultaneously, block the situation that core barrel not easily goes out the heart.
16, in the present invention, be provided with above the steel ball seat of described releasing pressure automatically assembly for the baffle plate to pressure release steel-ball limiting, the distance that pressure release steel ball moves upward can be controlled, improve the reliability that steel ball seat closed by pressure release steel ball.
Accompanying drawing explanation
Fig. 1 is general assembly structural representation of the present invention
Fig. 2 is the structural representation rotating assembly in the present invention
Fig. 3 is the structural representation of pressure-bearing device of the present invention
Fig. 4 is the structural representation of pressure-bearing piston of the present invention
Fig. 5 is the perspective view of pressure-bearing piston of the present invention
Fig. 6 is the structural representation of core grabber composite member of the present invention
Be labeled as in figure: 1, top connection, 2, six square bars, 3, six square sets, 4, stripper rubber, 5, pressurizing adaptor, 6, pressure-bearing steel ball, 7, pressure-bearing piston, 8, shear pin, 9, pressure-bearing cover, 10, pressure-bearing baffle ring, 11, urceolus short circuit, 12, rotate assembly, 13, urceolus, 14, interior cartridge module, 15, difference short circuit, 16, core grabber composite member, 17, core bit, 18, sand outlet, 19, runner, 20, cotter way, 21, adding pressure type core grabber, 22, axle, 23, steel ball seat, 24, pressure release steel ball, 25, bearing box, 26, bearing, 27, semi-ring, 28, back-up ring, 29, baffle plate, 30, adapter sleeve, 31, clip seat, 32, clip, 33, self-locking core grabber, 34, seal.
Detailed description of the invention
Embodiment 1
A kind of pressurized coring tool, comprise top connection 1, six square bar 2, six square set 3, urceolus short circuit 11, urceolus 13, difference short circuit 15, interior cartridge module 14 and core bit 17, six square sets 3 are connected with urceolus 13 by urceolus short circuit 11, urceolus 13 is connected with difference short circuit 15, difference short circuit 15 is connected with core bit 17, also comprises pressure-bearing device, rotates assembly 12 and core grabber composite member 16.
To being described as follows of the pressure-bearing device in the present invention:
Pressure-bearing device comprises pressure-bearing assembly and pin part, pressure-bearing assembly comprises pressure-bearing piston 7 and is socketed in the pressure-bearing cover 9 in pressure-bearing piston 7, pin part comprises shear pin 8, described pressure-bearing piston 7 upper end is by the step in the spacing pressurizing adaptor 6 in six square sets 3 of pressure-bearing steel ball 6, pressure-bearing steel ball 6 can transfer the pressure to pressure-bearing piston 7, lower end is connected with rotation assembly 12, pressure-bearing cover 9 is fixedly connected with pressure-bearing piston 7 by shear pin 8, it is spacing on urceolus short circuit 11 that pressure-bearing overlaps 9 lower ends, pressure-bearing piston 7 upper end is provided with and the sand outlet 18 of pressure-bearing piston 7 inner space and runner 19.
Described pressure-bearing piston 7 comprises and is provided with letting out sand body and being provided with the runner body of runner 19 of sand outlet 18, and the external diameter of runner body is less than the external diameter letting out sand body, and lets out sand body between runner body and pressure-bearing piston body.
The outer wall of described pressure-bearing piston 7 is provided with the annular cotter way 20 for being connected and fixed pressure-bearing cover 9, shear pin 8 one end is through the screwed hole on pressure-bearing cover 9, and the end of shear pin 8 is positioned at annular cotter way 20.Shear pin 8 is cut off in pitching pressure process, inner core is moved down, and then make adding pressure type core grabber 21 closed disintegrating rock core under the effect of drill bit inner chamber, by automatic leakage sand hole 18 and runner 19, achieve releasing pressure automatically function, adopt the operating efficiency and the reliability that this configuration has improved sand outlet 18 and runner 19, thus ensure that and can implement releasing pressure automatically smoothly.
In the present invention, described pin part also comprises pressure-bearing baffle ring 10, and pressure-bearing baffle ring 10 is fixedly connected with pressure-bearing piston 7, and spacing step surface place on urceolus short circuit 11.
The preferred embodiment of the present invention is, described sand outlet 18 radial direction is arranged on lets out on sand body, and runner 19 is axially disposed within runner body.
Further, described runner 19 is four and in groove shapes, four runners 19 are evenly distributed on runner body, and for drilling fluid circulation, pressure-bearing piston 7 is connected by runner 19 with pressurizing adaptor 5.Described sand outlet 18 is three, is evenly distributed on and lets out on sand body.
The order of connection of pressure-bearing device and connected mode are: lower member, except pressure-bearing cover 9, first assembles by coring tool, first by connecting thread, the bearing box 25 that pressure-bearing piston 7 and lower end rotate assembly is connected; Then pressure-bearing baffle ring 10 is enclosed within pressure-bearing cover 9, with shear pin 8, pressure-bearing cover 9 is connected with pressure-bearing piston 7; Finally all coring tool internal components are put into urceolus, ensure that pressure-bearing baffle ring 10 lower surface arrives on the interior step surface of urceolus pipe nipple 11; Then coring tool is mentioned rig floor and pull tight each screw thread of urceolus, assembling pressing mechanism in ground on the scene; Install successively sealing ring, pressurizing adaptor and on connect; Then pressing mechanism is hung on rig floor, then be threaded connection six square sets are connected with urceolus pipe nipple; Finally, first-class core bit, transfers drilling tool and the good slips of seat and safety slip, connects drilling tool and enter well, carry out the construction of coring.
Pressure-bearing device operating principle of the present invention is: in pitching pressure process, cut off shear pin, and inner core is moved down, and then makes adding pressure type core grabber closed disintegrating rock core under the effect of drill bit inner chamber, by sand outlet and runner, achieves releasing pressure automatically function.
To being described as follows of the rotation assembly in the present invention:
Rotate assembly 12 and comprise axle 22, one end of axle 22 is provided with whirligig, and the other end is provided with releasing pressure automatically assembly, and releasing pressure automatically assembly comprises steel ball seat 23 and the pressure release steel ball 24 for closed steel ball seat 23; The upper end of axle 22 is connected by the lower end of whirligig with pressure-bearing piston 7, and lower end is connected with the upper end of interior cartridge module 14.
The preferred embodiment of the present invention is, described whirligig comprises bearing box 25, is provided with bearing 26 in bearing box 25, bearing box 25 is provided with the link be connected with pressure-bearing piston 7 lower end.The structure of whirligig has a lot, and this is preferred embodiment, but is not limited thereto structure, also can adopt rotational structure of the prior art.
Further, axle in described bearing box 25 is provided with semi-ring 27, and stable and anti-lost for axle 22 of semi-ring 27, semi-ring 27 is axially provided with the back-up ring 28 of stationary half, the side of bearing 26 by semi-ring 27 and back-up ring 28 spacing, opposite side is spacing by the end of bearing box 25.
The link that described bearing box 25 is connected with pressure-bearing piston 7 lower end is internal thread button link, described releasing pressure automatically assembly is provided with the outside nut button link be connected with interior cartridge module 14.
Be provided with above the steel ball seat 23 of described releasing pressure automatically assembly for the baffle plate 29 spacing to pressure release steel ball 24, baffle plate 29 have opening, the distance that pressure release steel ball 24 moves upward can be controlled.
Rotation assembly operating principle of the present invention is: in the process of coring, due to thrust ball bearing with flat seat effect, the inner core of pressurizing tool can be rotated along with the rotation of drilling tool by bearing box, when fluid is toward time dirty, pressure release steel ball gear realizes pressure process in steel ball seat, prevents drilling fluid from entering inner core; When liquid backflow, pressure release steel ball and steel ball seat separately, make fluid by runner, realize pressure leak process.
To being described as follows of the core grabber composite member in the present invention:
Described core grabber composite member comprises adapter sleeve 30, clip seat 31, clip 32, adding pressure type core grabber 21 and self-locking core grabber 33, clip seat 31 one end is connected with the lower end of adapter sleeve 30, the other end is connected with adding pressure type core grabber 21, the upper end of adapter sleeve 30 is connected with interior cartridge module 14, clip 32 is arranged in clip seat 31, and self-locking core grabber 33 is arranged in adding pressure type core grabber 21.Self-locking core grabber 33 and adding pressure type core grabber 21 are threaded connection, drilling tool is carried on self-locking core grabber 33 passes through, core grabber is descending along tapering relative to rock core, until the mode of locking realizes entering the self-locking of rock core in core barrel, makes the rock core entered in core barrel be locked and can not skid off.Adding pressure type core grabber 21 is that under the effect of drill bit inner chamber, produce the pressure to core grabber, be the effect playing closed disintegrating rock core order in the process that moves down is pressurizeed in pitching.Core grabber composite member has the rock core that extracted of support when pulling out of hole and, with the performance of slip-off preventing, had both solved the problem that broken formation can not capture rock core, and can obtain into again the rock core that post is good.Adding pressure type core grabber 21 and self-locking core grabber 33 all can adopt structure of the prior art.
In the present invention, the outer wall of described adding pressure type core grabber 21 is also provided with the seal 34 coordinated with core bit inwall.
Preferred connected mode of the present invention is, described adapter sleeve 30 one end is provided with inner circle screw thread, the other end is provided with cylindrical screw thread, clip seat 31 one end is connected with adapter sleeve 30 by cylindrical screw thread, clip seat 31 other end is connected with adding pressure type core grabber by cylindrical screw thread, and clip 32 is connected with clip seat by the inner circle screw thread on clip seat 31 inwall.
Core grabber composite member operating principle of the present invention is: self-locking core grabber carries drilling tool on passing through, core grabber is descending along tapering relative to rock core, until the mode of locking realizes entering the self-locking of rock core in core barrel, the rock core entered in core barrel is made to be locked and can not to skid off, adding pressure type core grabber is in the process that moves down is pressurizeed in pitching, the pressure to core grabber is produced, closed disintegrating rock core under the effect of drill bit inner chamber.
Embodiment 2
Below the present invention is described in further detail:
Pressure-bearing piston is arranged on the stage casing of pressurized coring tool, sand outlet 18 and runner 19 is provided with in the front end of pressure-bearing piston 7, be provided with four runners 19 foremost in pressure-bearing piston 7, runner 19 is groove shapes, the pressure-bearing piston 7 in runner 19 rear end be circumferentially provided with three sand outlets 18; The upper end of pressure-bearing piston 7 is blocked in the pressurizing adaptor 5 of coring tool by pressure-bearing steel ball 6, and the upper end of pressurizing adaptor 5 is six square bars 2, between six square bars 2 and pressurizing adaptor 5, be provided with stripper rubber 4; Six square bars 2, pressurizing adaptor 5 and stripper rubber 4 are arranged in six square sets 3, and the upper end of six square bars 2 connects top connection 1 by male joint; The rear end of pressure-bearing piston 7 coordinates location by pressure-bearing cover 9 and pressure-bearing baffle ring 10, and pressure-bearing cover 9 is connected with pressure-bearing piston 7 by shear pin 8, and pressure-bearing piston 7 is located by urceolus short circuit 11; There is thread the rear end of pressure-bearing piston 7; The stage casing of pressure-bearing piston 7 is provided with cotter way 20.
Rotate the lower end that assembly 12 is arranged on pressure-bearing piston 7, rotate assembly 12 and comprise axle and bearing box, one end of axle is provided with releasing pressure automatically assembly, has steel ball seat 23 in releasing pressure automatically assembly, and steel ball seat 23 is provided with pressure release steel ball 24; The cylindrical of releasing pressure automatically assembly is the outside nut button be connected with lower ending tool; Be bearing box 25 at the other end of axle, in bearing box 25, be provided with bearing 26, be also provided with axial steel wire back-up ring 28 at the tail end of axle 22, axial steel wire back-up ring 28 is arranged in semi-ring 27; The afterbody inner circle of described bearing box 25 has the internal thread button be connected with upper tool; The lower end rotating assembly 12 is connected with the inner core of core grabber composite member, and rotate assembly 12 and be arranged in urceolus short circuit 11, the lower end of urceolus short circuit 11 is connected with the urceolus of core grabber composite member.
Core grabber composite member 16 is connected to the lower end of pressurization coring tool, and comprise adapter sleeve 30, clip seat 31, clip 32, self-locking core grabber 33 and adding pressure type core grabber 21, core grabber composite member is arranged in urceolus 13 and difference short circuit 15; Clip 32 is arranged in clip seat 31, inner circle screw thread and cylindrical screw thread respectively at the two ends of adapter sleeve 30, clip seat 31, clip 32 and adding pressure type core grabber 21, the inner circle screw thread of adding pressure type core grabber 21 and the cylindrical screwed connection of clip seat 31, the inner circle screw thread of clip seat 31 and the cylindrical screwed connection of adapter sleeve 30, the inner circle screw thread of adapter sleeve 30 is connected with the instrument on top, is also provided with seal 34 at the cylindrical of adding pressure type core grabber 21.
Self-locking core grabber 33 and adding pressure type core grabber 21 are arranged on the front end of core grabber composite member, self-locking core grabber 33 be by carry drilling tool, core grabber is descending along tapering relative to rock core, until the mode of locking realizes entering the self-locking of rock core in core barrel, the rock core entered in core barrel is made to be locked and can not to skid off.Adding pressure type core grabber 21 is that under the effect of drill bit inner chamber, produce the pressure to core grabber, be the effect playing closed disintegrating rock core order in the process that moves down is pressurizeed in pitching.
Connected mode of the present invention:
Before the use the present invention that goes into the well, first pressure-bearing piston 7, rotation assembly 12 and core grabber composite member are assembled respectively, then in six square sets 3, load six square bars 2, stripper rubber 4 and pressure-bearing steel ball 6 successively, then the pressure-bearing piston 7 assembled is loaded in six square sets 3; Then by the upper end of rotation assembly 12 that assembles and the screwed connection of pressure-bearing piston 7 lower end, and then urceolus short circuit 11 is enclosed within the outside rotating assembly 12, and connect with the lower end of six square sets 3, then the core grabber composite member upper end assembled and rotation assembly 12 are connected, again the urceolus 13 connected and difference short circuit 15 are enclosed within the outside of core grabber composite member, and be connected with the lower end of urceolus short circuit 11, then core bit 17 is connected to urceolus lower end, this completes assembling of the present invention.
The course of work of the present invention:
Go into the well use time, the top connection 1 of upper end of the present invention is connected with drilling tool, then sends into down-hole by drilling tool, after arriving predetermined coring bed, coring tool starts to rotate under the drive of drilling tool, and the core bit of front end starts cutting rock, because core bit is hollow, so, when drill bit constantly creeps into downwards, cut rock just defines core column, and constantly enters the inner core of core barrel, after coring footage has bored, by drill-well operation code, drilling fluid is circulated before cutting the heart.
In the process of coring, due to thrust ball bearing with flat seat effect, one end of axle is provided with releasing pressure automatically assembly, in releasing pressure automatically assembly, have steel ball seat, and steel ball seat is provided with pressure release steel ball; The cylindrical of releasing pressure automatically assembly is the outside nut button be connected with lower ending tool; Be bearing box at the other end of axle, in bearing box, be provided with bearing, be also provided with axial steel wire back-up ring at the tail end of axle, axial steel wire back-up ring is arranged in semi-ring; The afterbody inner circle of bearing box has the internal thread button be connected with upper tool; The lower end rotating assembly is connected with the inner core of core grabber composite member, and rotate assembly and be arranged in urceolus short circuit, the lower end of urceolus short circuit is connected with the urceolus of core grabber composite member, and the inner core of pressurizing tool can rotate along with the rotation of drilling tool.
Self-locking core grabber carries drilling tool on passing through, and core grabber is descending along tapering relative to rock core, until the mode of locking realizes entering the self-locking of rock core in core barrel, makes the rock core entered in core barrel be locked and can not skid off.Adding pressure type core grabber is that under the effect of drill bit inner chamber, produce the pressure to core grabber, be the effect playing closed disintegrating rock core order in the process that moves down is pressurizeed in pitching.
Cut the heart: core complete when cutting the heart, carry drilling tool first and expose ball seat, then drop into pressure-bearing steel ball 6, press down drilling tool and guarantee that shear pin 8 is cut off, continue pressurization, static 20-30S, now inner core moves down, under the effect of pressurized coring drill bit inner chamber, and the broken rock core of adding pressure type core grabber pinch confinement; Then slowly on carry drilling tool, note observing weight indicator display.If on carry drilling tool exceed drilling tool compression apart from and do not increase suspending weight, then assert and cut the heart and operated.After cutting the heart, pull out of hole by drill-well operation regulatory requirements.
Go out the heart: cut the heart complete and rise get into after on rig floor, first lay down the screw thread between six square sets 3 and urceolus pipe nipple 11, top connection 1, six square bar 2, six square set 3, pressurizing adaptor 5 are separated with the pressure-bearing piston 7 etc. of below, dropping of pressure-bearing steel ball 6 and shear pin 8 is noted in separation process, avoid falling into well head or loss, then be connected with pressure-bearing piston 7 with promotion instrument, pull-up promotes instrument, inner core is proposed urceolus 13, take off the shear pin 8 in pressure-bearing cover with screw cutter again, finally go out the requirement of heart operational procedure by drilling well and carry out heart operation.
Continuous coring: when completing out heart operation and inner core cleaning, after taking out disconnected operation such as shear pin 8 grade, if desired continuous coring is carried out, first inner core inner core chuck is fixed on urceolus pipe nipple 11, then be connected with rotation assembly 12, rotate assembly 12 to be connected with pressure-bearing piston 7, put into pressure-bearing baffle ring 10 and pressure-bearing cover 9, pressure-bearing cover 9 is connected by shear pin 8 with pressure-bearing piston 7, pressure-bearing piston 7 is connected again with promotion instrument, and sling pressure-bearing piston 7 and inner core etc. below, then inner core chuck is taken off, pressure-bearing baffle ring 10 just falls to be placed on the step of urceolus pipe nipple 11, slowly transferring promotion instrument, pressure-bearing piston 7 and interior cartridge module are on pressure-bearing baffle ring 10, finally unload promotion instrument.Top connection 1, six square bar 2, six square set 3, pressurizing adaptor 5 four parts need not be dismantled smoothly and under stripper rubber 4 sealing effectiveness good situations in slip, after completing aforesaid operations, six square sets 3 and urceolus pipe nipple 11 are threaded connection, well can be entered and carry out next step coring operation, and so forth.
Claims (9)
1. a pressurized coring tool, comprise six square bars (2), six square sets (3), urceolus short circuit (11), urceolus (13), difference short circuit (15), interior cartridge module (14) and core bit (17), six square sets (3) are connected with urceolus (13) by urceolus short circuit (11), urceolus (13) is connected with difference short circuit (15), difference short circuit (15) is connected with core bit (17), it is characterized in that: also comprise pressure-bearing device, rotate assembly (12) and core grabber composite member (16);
Described pressure-bearing device comprises pressure-bearing assembly and pin part, pressure-bearing assembly comprises pressure-bearing piston (7) and is socketed in the pressure-bearing cover (9) in pressure-bearing piston (7), pin part comprises shear pin (8), described pressure-bearing piston (7) upper end is by spacing pressurizing adaptor (5) place in six square sets (3) of pressure-bearing steel ball (6), lower end is connected with rotation assembly (12), pressure-bearing cover (9) is fixedly connected with pressure-bearing piston (7) by shear pin (8), pressure-bearing cover (9) lower end is spacing on urceolus short circuit (11), pressure-bearing piston (7) upper end is provided with and the sand outlet (18) of pressure-bearing piston (7) inner space and runner (19),
Described rotation assembly (12) comprises axle (22), and one end of axle (22) is provided with whirligig, and the other end is provided with releasing pressure automatically assembly, and releasing pressure automatically assembly comprises steel ball seat (23) and the pressure release steel ball (24) for closed steel ball seat (23); The upper end of axle (22) is connected by the lower end of whirligig with pressure-bearing piston (7), and lower end is connected with the upper end of interior cartridge module (14); Described steel ball seat (23) top is provided with for the baffle plate (29) spacing to pressure release steel ball (24);
Described core grabber composite member (16) comprises adapter sleeve (30), clip seat (31), clip (32), adding pressure type core grabber (21) and self-locking core grabber (33), clip seat (31) one end is connected with the lower end of adapter sleeve (30), the other end is connected with adding pressure type core grabber (21), the upper end of adapter sleeve (30) is connected with interior cartridge module (14), clip (32) is arranged in clip seat (31), and self-locking core grabber (33) is arranged in adding pressure type core grabber (21).
2. pressurized coring tool according to claim 1, it is characterized in that: described pressure-bearing piston (7) comprises and is provided with letting out sand body and being provided with the runner body of runner (19) of sand outlet (18), the external diameter of runner body is less than the external diameter letting out sand body, and lets out sand body between runner body and pressure-bearing piston body.
3. pressurized coring tool according to claim 1 and 2, is characterized in that: described pin part also comprises pressure-bearing baffle ring (10), and pressure-bearing baffle ring (10) is fixedly connected with pressure-bearing piston (7), and spacing step surface on urceolus short circuit (11).
4. pressurized coring tool according to claim 2, is characterized in that: described sand outlet (18) radial direction is arranged on lets out on sand body, and runner (19) is axially disposed within runner body.
5. pressurized coring tool according to claim 4, is characterized in that: described runner (19) is four and in groove shapes, four runners (19) are evenly distributed on runner body.
6. pressurized coring tool according to claim 4, is characterized in that: described sand outlet (18) is three, is evenly distributed on and lets out on sand body.
7. the pressurized coring tool according to claim 1,2,4,5 or 6, it is characterized in that: the outer wall of described pressure-bearing piston (7) is provided with the annular cotter way (20) for being connected and fixed pressure-bearing cover, shear pin (8) one end is connected in annular cotter way (20) through pressure-bearing cover (9).
8. the pressurized coring tool according to claim 1,2,4,5 or 6, it is characterized in that: described whirligig comprises bearing box (25), in bearing box (25), be provided with bearing (26), bearing box (25) be provided with the link be connected with pressure-bearing piston (7) lower end.
9. pressurized coring tool according to claim 8, it is characterized in that: the axle (22) in described bearing box (25) is provided with semi-ring (27), the upper back-up ring (28) being axially provided with stationary half of semi-ring (27), the side of bearing (26) by semi-ring (27) and back-up ring (28) spacing, the end that opposite side passes through bearing box (25) is spacing.
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| CN201210445044.6A CN102900390B (en) | 2012-11-09 | 2012-11-09 | Pressurized coring tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103603622A (en) * | 2013-11-29 | 2014-02-26 | 无锡中地地质装备有限公司 | Improved single acting mechanism in drilling tool |
| CN104153734B (en) * | 2014-08-27 | 2017-01-25 | 四川川庆石油钻采科技有限公司 | Hydraulic pressure type coring tool |
| CN109779552B (en) * | 2018-08-13 | 2023-05-12 | 四川大学 | Automatic start-stop mechanism of core drilling machine |
| CN110454105B (en) * | 2019-08-27 | 2022-01-28 | 重庆安标检测研究院有限公司 | In-situ test system and method for gas content of coal mine underground coal seam while drilling |
| CN111997550B (en) * | 2020-08-20 | 2023-03-17 | 中国煤炭地质总局勘查研究总院 | Loose stratum coring device and method |
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| CN102900390A (en) | 2013-01-30 |
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Effective date of registration: 20200911 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |