CN202970567U - Pressure-bearing piston for pressurized coring tool - Google Patents
Pressure-bearing piston for pressurized coring tool Download PDFInfo
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- CN202970567U CN202970567U CN 201220587568 CN201220587568U CN202970567U CN 202970567 U CN202970567 U CN 202970567U CN 201220587568 CN201220587568 CN 201220587568 CN 201220587568 U CN201220587568 U CN 201220587568U CN 202970567 U CN202970567 U CN 202970567U
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Abstract
The utility model discloses a pressure-bearing piston for a pressurized coring tool. The pressure-bearing piston is characterized in that a pin slot matched with a shear pin connected with a pressure-bearing sleeve is formed in the outer wall of the pressure-bearing piston; and a sand outlet and a flow passage which are communicated with the inner chamber of the pressure-bearing piston are arranged on the pressure-bearing piston. According to the pressure-bearing piston disclosed by the utility model, the problem that the performances of an outer cylinder are damaged due to the fact that a pin penetrates through the outer cylinder in the traditional pressurized coring tool is solved; the aim that the structure and the performances of the outer cylinder are prevented from being damaged can be achieved; and in addition, the pressure-bearing piston has a function of automatically relieving the pressure.
Description
Technical field
The utility model relates to a kind of pressure-bearing piston that is applicable to pressurized coring tool, is used for the pressurized coring tool of oil-gas drilling operation process, belongs to petroleum gas core equipment manufacturing technology field.
Background technology
In the drilling process of 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 the construction that drills through to underground different layers position rock core, in order to obtain rock core preferably, just need to adopt special coring tool in drilling through rock core.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 the 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 that uses the machinery pressurization, mainly solves the problem that existing machinery pressurization coring tool can not rinse inner core, troublesome poeration and poor reliability.Comprise six square sets, suspension joint, urceolus, reach drill bit, reach 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 CN200920194502.3, a kind of mechanical adding pressure type hermetic core taking tool for scall is disclosed, mainly solve existing mechanical pressurized coring tool need repeatedly pitching, on carry drilling tool, be subjected to the large problem of Well Deflection Influence, comprise six square bars, cut off and be enclosed within six square sets and the hole that cuts off cover corresponding position uniform several horizontal directions, this Unconsolidated strata mechanical pressurizing-type closed coring tool has an only pitching of need, do not use and carry drilling tool, be subjected to the little characteristics of Well Deflection Influence.What these coring tools were the longest at present can obtain 9.2 meters long rock cores, more than yield rate can reach 60 %, has the good effect of coring.
in existing pressurized coring technology, have in pressurized coring tool without the pressure-bearing cover, what have has a pressure-bearing cover, problem is: no matter have that pressure-bearing is overlapped or do not have pressure-bearing to overlap, all directly to wear pin between urceolus and pressure-bearing piston, the coring operation when although the dual mode of prior art can be implemented the oil and gas exploration drilling well, but the shortcoming of prior art is also very outstanding, main shortcoming is: the former is owing to there is no the pressure-bearing cover, cause urceolus tension torsional property to descend after wearing pin between urceolus and pressure-bearing piston, the security performance of coring tool is reduced, finally cause coring tool damage, although the latter is designed with the pressure-bearing cover, but, because being wears pin between pressure-bearing piston and pressure-bearing cover, because the pressure of this position is larger, therefore this pin mode of wearing can be easy to cause urceolus in the thorn leakage at pin hole place, time slightly length will pierce through fully, cause tool damage, simultaneously, because pin hole damages, just need to change urceolus, and the cost of the replacing of overcoat is high, can bring the rising of construction cost.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above that existing pressurized coring technology exists, a kind of pressure-bearing piston that is applicable to pressurized coring tool is provided, the utility model has solved existing pressurized coring tool and has worn the problem of pin damage urceolus performance from urceolus, can reach the purpose of not damaging outer tube structure and performance, and have the releasing pressure automatically function.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of pressure-bearing piston that is applicable to pressurized coring tool, it is characterized in that: be provided with on the outer wall of described pressure-bearing piston for the cotter way that coordinates with the shear pin that is connected pressure-bearing cover, be provided with the sand outlet and the runner that are communicated with the pressure-bearing piston inner chamber on pressure-bearing piston.
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 of 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 body let out is the integral type structure.
Described sand outlet radially is arranged on to be let out on sand body, and runner is axially disposed within on the runner body.
Described runner is four and is groove shapes, and four uniform flow passage are distributed on the runner body.
Described sand outlet is three, is evenly distributed on and lets out on sand body.
Employing the utility model has the advantage of:
one, in the utility model, be provided with on the outer wall of described pressure-bearing piston for the cotter way that coordinates with the shear pin that is connected pressure-bearing cover, be provided with the sand outlet and the runner that are communicated with the pressure-bearing piston inner chamber on pressure-bearing piston, the mode that cotter way coordinates with shear pin has solved existing pressurized coring tool and has worn the problem of pin damage urceolus performance from urceolus, can cut off shear pin in pitching pressure process, inner core is moved down, and then make the adding pressure type core grabber seal the kata-rocks heart under the effect of drill bit inner chamber, can reach the purpose of not damaging outer tube structure and performance, avoided simultaneously the conventional pin of wearing pin outwards to withdraw from from pin hole, block the situation that core barrel is difficult for the heart.
Two, in the utility model, 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 of letting out sand body, and let out sand body between runner body and pressure-bearing piston body, by automatic leakage sand hole and runner, realized the releasing pressure automatically function, and adopted this structure to improve operating efficiency and the reliability of sand outlet and runner, thereby guaranteed to implement smoothly releasing pressure automatically.
Three, in the utility model, the described sand body and runner body and pressure-bearing piston body let out is the integral type structure, not only is convenient to produce, and do not have sealing problem.
Four, in the utility model, described sand outlet radially is arranged on to be let out on sand body, and runner is axially disposed within on the runner body, adopts this structure to be convenient to let out sand and fluid is discharged by runner, has improved the reliability of pressure release.
Five, in the utility model, described runner is four and is groove shapes, and four uniform flow passage are distributed on the runner body, adopt this structure to improve the efficient that fluid is discharged by runner.
Six, in the utility model, described sand outlet is three, is evenly distributed on and lets out on sand body, adopts this structure to improve and lets out sand efficient.
Description of drawings
Fig. 1 is structural representation of the present utility model
Fig. 2 is perspective view of the present utility model
Fig. 3 is the pressure-bearing device structural representation in coring tool
Fig. 4 is coring tool general assembly structural representation
Fig. 5 is the structural representation of the rotation assembly in coring tool
Fig. 6 is the structural representation of the core grabber composite member in coring tool
be labeled as in figure: 1, top connection, 2, six square bars, 3, six square sets, 4, stripper rubber, 5, pressurizing adaptor, 6, the pressure-bearing steel ball, 7, pressure-bearing piston, 8, shear pin, 9, the pressure-bearing cover, 10, the pressure-bearing baffle ring, 11, the urceolus short circuit, 12, the rotation assembly, 13, urceolus, 14, interior cartridge module, 15, the difference short circuit, 16, the core grabber composite member, 17, core bit, 18, sand outlet, 19, runner, 20, cotter way, 21, the adding pressure type core grabber, 22, axle, 23, steel ball seat, 24, the pressure release steel ball, 25, bearing box, 26, bearing, 27, semi-ring, 28, back-up ring, 29, baffle plate, 30, adapter sleeve, 31, the clip seat, 32, clip, 33, the self-locking core grabber, 34, seal.
The specific embodiment
Embodiment 1
A kind of pressure-bearing piston that is applicable to pressurized coring tool is provided with on the outer wall of described pressure-bearing piston 7 for the cotter way 20 that coordinates with the shear pin 8 that is connected pressure-bearing cover 9, is provided with the sand outlet 18 and the runner 19 that are communicated with pressure-bearing piston 7 inner chambers on pressure-bearing piston 7.
Preferred embodiment of the present utility model is, described pressure-bearing piston 7 comprises and be 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 of letting out sand body, and lets out sand body between runner body and pressure-bearing piston body.
Another preferred embodiment of the present utility model is, described to let out sand body and runner body and pressure-bearing piston body be the integral type structure, but be not limited to integral structure.
Another preferred embodiment of the present utility model is, described sand outlet 18 radially is arranged on to be let out on sand body, and runner 19 is axially disposed within on the runner body.
Another preferred embodiment of the present utility model is, described runner 19 is four and is groove shapes, and four runners 19 are evenly distributed on the runner body, and the quantity of runner 19 is not limited to four.
Another preferred embodiment of the present utility model is, described sand outlet 18 is three, is evenly distributed on and lets out on sand body, and the quantity of sand outlet is not limited to three.
Embodiment 2
The present embodiment is that the utility model is applied in pressurized coring tool, presses other parts of coring tool to be elaborated in conjunction with adding formula.
The pressurized coring tool that relates to, comprise top connection 1, 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, also comprises pressure-bearing device, rotation assembly 12 and core grabber composite member 16.
To being described as follows of pressure-bearing device:
pressure-bearing device comprises pressure-bearing assembly and pin part, the pressure-bearing assembly comprises pressure-bearing piston 7 and the pressure-bearing cover 9 that is socketed on pressure-bearing piston 7, pin part comprises shear pin 8, described pressure-bearing piston 7 upper ends are by on 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, the 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 ends are spacing on urceolus short circuit 11, pressure-bearing piston 7 upper ends are provided with sand outlet 18 and the runner 19 that is communicated with pressure-bearing piston 7 inner chambers.
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 of letting out sand body, and lets out sand body between runner body and pressure-bearing piston body.
Be provided with on the outer wall of described pressure-bearing piston 7 be used to the annular cotter way 20 that is connected and fixed pressure-bearing cover 9, shear pin 8 one ends pass the screwed hole on pressure-bearing cover 9, and the end of shear pin 8 is positioned at annular cotter way 20.Cut off shear pin 8 in pitching pressure process, inner core is moved down, and then make adding pressure type core grabber 21 seal the kata-rocks heart under the effect of drill bit inner chamber, by automatic leakage sand hole 18 and runner 19, realized the releasing pressure automatically function, adopt this structure to improve operating efficiency and the reliability of sand outlet 18 and runner 19, thereby guaranteed to implement smoothly releasing pressure automatically.
In the present embodiment, 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 embodiment is, described sand outlet 18 radially is arranged on to be let out on sand body, and runner 19 is axially disposed within on the runner body.
Further, described runner 19 is four and is groove shapes, and four runners 19 are evenly distributed on the runner body, is used for the drilling fluid circulation, and pressure-bearing piston 7 and pressurizing adaptor 5 are connected by runner 19.Described sand outlet 18 is three, is evenly distributed on and lets out on sand body.
Pressure-bearing device has solved existing pressurized coring tool and has worn the problem of pin damage urceolus performance from urceolus, can cut off shear pin in pitching pressure process, inner core is moved down, and then make the adding pressure type core grabber seal the kata-rocks heart under the effect of drill bit inner chamber, can reach the purpose of not damaging outer tube structure and performance, avoid simultaneously the conventional pin of wearing pin outwards to withdraw from from pin hole, blocked the situation that core barrel is difficult for the heart.
The order of connection of pressure-bearing device and connected mode are: coring tool first assembles lower member except pressure-bearing cover 9, first by connecting thread, the bearing box 25 of pressure-bearing piston 7 with lower end rotation assembly is connected; Then pressure-bearing baffle ring 10 is enclosed within on pressure-bearing cover 9, uses shear pin 8 that pressure-bearing cover 9 is connected with pressure-bearing piston and connect; At last all coring tool internal components are put into urceolus, guarantee that pressure-bearing baffle ring 10 lower surfaces arrive on the interior step surface of urceolus pipe nipple 11; Then coring tool is mentioned rig floor pulls 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 the urceolus pipe nipple; At last, first-class core bit is transferred drilling tool and the good slips of seat and safety slip, connects drilling tool and enters well, the construction of coring.
The pressure-bearing device operating principle is: cut off shear pin in pitching pressure process, inner core is moved down, and then make the adding pressure type core grabber seal the kata-rocks heart under the effect of drill bit inner chamber, by sand outlet and runner, realized the releasing pressure automatically function.
To rotating being described as follows of assembly:
Rotation assembly 12 comprises axle 22, and an end of axle 22 is provided with whirligig, and the other end is provided with the releasing pressure automatically assembly, and the releasing pressure automatically assembly comprises steel ball seat 23 and is used for the pressure release steel ball 24 of sealing steel ball seat 23; The upper end of axle 22 is connected by the lower end of whirligig with pressure-bearing piston 7, and the lower end is connected with the upper end of interior cartridge module 14.
The preferred embodiment of the present embodiment is, described whirligig comprises bearing box 25, is provided with bearing 26 in bearing box 25, is provided with the link that is connected with pressure-bearing piston 7 lower ends on bearing box 25.The structure of whirligig has a lot, and this is preferred embodiment, but is not limited to this structure, also can adopt rotational structure of the prior art.
Further, be provided with semi-ring 27 on axle in described bearing box 25, semi-ring 27 is used for the stable and anti-lost of axle 22, axially is provided with the back-up ring 28 of stationary half on semi-ring 27, one side of bearing 26 is spacing by semi-ring 27 and back-up ring 28, and opposite side is spacing by the end of bearing box 25.
The link that is connected with pressure-bearing piston 7 lower ends on described bearing box 25 is internal thread button link, is provided with the outside nut button link that is connected with interior cartridge module 14 on described releasing pressure automatically assembly.
Steel ball seat 23 tops of described releasing pressure automatically assembly are provided with for the baffle plate 29 spacing to pressure release steel ball 24, have opening on baffle plate 29, can control the distance that pressure release steel ball 24 moves upward.
To rotate assembly is arranged in pressurized coring tool, in the process of coring, due to the thrust ball bearing with flat seat effect, the inner core of pressurizing tool can rotate along with the rotation of drilling tool, solved prior art because the pressurizing tool inner core can not rotate, easily caused entering the problem of the disintegration of core of inner core, and the pressure release steel ball is realized pressure release when moving upward, realize sealing when moving downward on steel ball seat, can prevent that drilling fluid from entering inner core.
The rotation assembly operating principle of the present embodiment is: in the process of coring, due to the thrust ball bearing with flat seat effect, the inner core of pressurizing tool can rotate along with the rotation of drilling tool by bearing box, when fluid when dirty, pressure release steel ball gear is realized pressure process on steel ball seat, prevent that drilling fluid from entering inner core; When liquid backflow, pressure release steel ball and steel ball seat separately make fluid pass through runner, realize pressure leak process.
To being described as follows of core grabber composite member:
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 1 ends are 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, self-locking core grabber 33 by on carry drilling tool, the relative rock core of core grabber is descending along tapering, until the mode of locking realizes entering the self-locking of rock core in core barrel, makes the rock core that enters in core barrel locked and can not skid off.Adding pressure type core grabber 21 is in the process that pitching pressurization moves down, and produces the pressure to core grabber under the effect of drill bit inner chamber, and order ground is the effect of playing the closed disintegrating rock core.The core grabber composite member has support has extracted when pulling out of hole rock core with the performance of slip-off preventing, both solved the problem that broken formation can not grasp rock core, can obtain into again the good rock core of post.Adding pressure type core grabber 21 and self-locking core grabber 33 all can adopt structure of the prior art.
In the present embodiment, also be provided with the seal 34 that coordinates with the core bit inwall on the outer wall of described adding pressure type core grabber 21.
The preferred connected mode of the present embodiment is, described adapter sleeve 30 1 ends are provided with the inner circle screw thread, the other end is provided with the cylindrical screw thread, clip seat 31 1 ends are connected with adapter sleeve 30 by the cylindrical screw thread, clip seat 31 other ends are connected with adding pressure type core grabber 21 by the cylindrical screw thread, and clip 32 is connected with the clip seat by the inner circle screw thread on clip seat 31 inwalls.
because the self-locking core grabber of core grabber composite member has the performance that self-locking becomes the post rock core, and the adding pressure type core grabber has support has extracted when pulling out of hole rock core with the performance of slip-off preventing, so Combination application by self-locking core grabber and adding pressure type core grabber, in use, it is harder that the self-locking core grabber plays crawl, become post preferably, the rock core effect that the adding pressure type core grabber can't grasp, the adding pressure type core grabber plays guiding and advances the heart, cut the heart and the effect of closed disintegrating rock core, thereby both solved the problem that broken formation can not grasp rock core, obtained the good rock core of post by the self-locking core grabber again, realized that pressurized coring tool both can obtain broken rock core, can obtain into again the good rock core of post.
Core grabber composite member operating principle is: the self-locking core grabber by on carry drilling tool, the relative rock core of core grabber is descending along tapering, until the mode of locking realizes entering the self-locking of rock core in core barrel, make the rock core that enters in core barrel locked and can not skid off, the adding pressure type core grabber is in the process that the pitching pressurization moves down, produce the pressure to core grabber under the effect of drill bit inner chamber, the closed disintegrating rock core.
Embodiment 3
The present embodiment is when being applied in pressurized coring tool to the utility model, presses connection and the course of work thereof of coring tool to be elaborated to adding formula.
Pressure-bearing piston is arranged on the stage casing of pressurized coring tool, front end in pressure-bearing piston 7 is provided with sand outlet 18 and runner 19, pressure-bearing piston 7 be provided with foremost four runners 19, runner 19 is groove shapes, is provided with three sand outlets 18 on the circumference of the pressure-bearing piston 7 of runner 19 rear ends; The upper end of pressure-bearing piston 7 is blocked in by pressure-bearing steel ball 6 in the pressurizing adaptor 5 of coring tool, and the upper end of pressurizing adaptor 5 is six square bars 2, is provided with stripper rubber 4 between six square bars 2 and pressurizing adaptor 5; 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 is located 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 by urceolus short circuit 11 location; 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.
Rotation assembly 12 is arranged on the lower end of pressure-bearing piston 7, and rotation assembly 12 comprises axle and bearing box, and an end of axle is provided with the releasing pressure automatically assembly, and steel ball seat 23 is arranged in the releasing pressure automatically assembly, is provided with pressure release steel ball 24 on steel ball seat 23; The cylindrical of releasing pressure automatically assembly is the outside nut button that is connected with lower ending tool; The other end in axle is bearing box 25, is provided with bearing 26 in bearing box 25, also is provided with axial steel wire back-up ring 28 at the tail end of axle 22, and 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 that is connected with upper tool; The lower end of rotation assembly 12 is connected with the inner core of core grabber composite member, and rotation assembly 12 is arranged in urceolus short circuit 11, and 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, comprises adapter sleeve 30, clip seat 31, clip 32, self-locking core grabber 33 and adding pressure type core grabber 21, and the core grabber composite member is arranged in urceolus 13 and difference short circuit 15; Clip 32 is arranged in clip seat 31, respectively inner circle screw thread and cylindrical screw thread 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, also is 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 on carry drilling tool, the relative rock core of core grabber is descending along tapering, until the mode of locking realizes entering the self-locking of rock core in core barrel, make the rock core that enters in core barrel locked and can not skid off.Adding pressure type core grabber 21 is in the process that pitching pressurization moves down, and produces the pressure to core grabber under the effect of drill bit inner chamber, and order ground is the effect of playing the closed disintegrating rock core.
The connected mode of pressurized coring tool is as follows:
Go into the well use before, first pressure-bearing piston 7, rotation assembly 12 and core grabber composite member are assembled respectively then pack into successively six square bars 2, stripper rubber 4 and pressure-bearing steel ball 6, then the pressure-bearing piston 7 that assembles is packed in six square sets 3 in six square sets 3; The screwed connection of the upper end of the rotation assembly 12 that then will assemble and pressure-bearing piston 7 lower ends, and then with urceolus short circuit 11 be enclosed within the rotation assembly 12 the outside, and connect with the lower end of six square sets 3, then core grabber composite member upper end and the rotation assembly 12 that assembles connected, again the urceolus 13 that connects 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 the urceolus lower end, so just completed assembling.
The course of work of pressurized coring tool is as follows:
Go into the well when using, the top connection 1 of upper end is connected with drilling tool, then send into the down-hole by drilling tool, after arriving predetermined coring bed, coring tool begins rotation under the drive of drilling tool, the core bit of front end begins cutting rock, because core bit is hollow, so, when drill bit constantly crept into downwards, cut rock had just formed the rock core post, and constantly entered the inner core of core barrel, after coring footage has bored, cut and by the drill-well operation rules, drilling fluid is circulated before the heart.
In the process of coring, due to the thrust ball bearing with flat seat effect, an end of axle is provided with the releasing pressure automatically assembly, in the releasing pressure automatically assembly, steel ball seat is arranged, and is provided with the pressure release steel ball on steel ball seat; The cylindrical of releasing pressure automatically assembly is the outside nut button that is connected with lower ending tool; The other end in axle is bearing box, is provided with bearing in bearing box, also is provided with the axial steel wire back-up ring at the tail end of axle, and the axial steel wire back-up ring is arranged in semi-ring; The afterbody inner circle of bearing box has the internal thread button that is connected with upper tool; The lower end of rotation assembly is connected with the inner core of core grabber composite member, and the rotation assembly is arranged in the urceolus short circuit, and 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.
The self-locking core grabber by on carry drilling tool, the relative rock core of core grabber is descending along tapering, until the mode of locking realizes entering the self-locking of rock core in core barrel, makes the rock core that enters in core barrel locked and can not skid off.The adding pressure type core grabber is in the process that pitching pressurization moves down, and produces the pressure to core grabber under the effect of drill bit inner chamber, and order ground is the effect of playing the closed disintegrating rock core.
Cut the heart: core complete when cutting the heart, carrying drilling tool on first exposes ball seat, then drops into pressure-bearing steel ball 6, press down drilling tool and guarantee that shear pin 8 is cut off, continue pressurization, static 20-30S, this moment, inner core moved 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 carry drilling tool on slowly, note observing weight indicator and show.If on carry drilling tool surpass the drilling tool compression apart from and do not increase suspending weight, assert that cutting heart operation completes.Cut the heart complete after, pull out of hole by the requirement of drill-well operation rules.
Go out the heart: cut the heart complete and rise get on rig floor after, first lay down the screw thread between six square sets 3 and urceolus pipe nipple 11, pressure-bearing piston 7 of top connection 1, six square bars 2, six square sets 3, pressurizing adaptor 5 and below etc. is separated, note dropping of pressure-bearing steel ball 6 and shear pin 8 in separation process, avoid falling into well head or loss, then be connected with pressure-bearing piston 7 with the promotion instrument, on draw the promotion instrument, inner core is proposed urceolus 13, take off shear pin 8 in pressure-bearing cover with the screw cutter again, go out requirements of heart operational procedure by drilling well at last and go out the heart and operate.
continuous coring: clean when completing out heart operation and inner core, after taking out disconnected shear pin 8 operations such as grade, if need to carry out continuous coring, first inner core is fixed on urceolus pipe nipple 11 with the inner core chuck, then be connected with rotation assembly 12, rotation assembly 12 is connected with pressure-bearing piston 7, put into pressure-bearing baffle ring 10 and pressure-bearing cover 9, pressure-bearing cover 9 is connected with pressure-bearing piston connects by shear pin 8, connect pressure-bearing piston 7 with the promotion instrument again, and sling pressure-bearing piston 7 and following inner core etc., then take off the inner core chuck, pressure-bearing baffle ring 10 just falls to be placed on the step of urceolus pipe nipple 11, slowly transferring the promotion instrument, pressure-bearing piston 7 and interior cartridge module are on pressure-bearing baffle ring 10, unload at last the promotion instrument.Top connection 1, six square bars 2, six square sets 3,5 four parts of pressurizing adaptor need not be dismantled under slide smooth and stripper rubber 4 sealing effectiveness good situations, after completing aforesaid operations, six square sets 3 and urceolus pipe nipple 11 are threaded connection, can enter well and carry out next step operation of coring, and so forth.
Claims (6)
1. pressure-bearing piston that is applicable to pressurized coring tool, it is characterized in that: be provided with on the outer wall of described pressure-bearing piston (7) for the cotter way (20) that coordinates with the shear pin that is connected pressure-bearing cover (9) (8), be provided with the sand outlet (18) and the runner (19) that are communicated with pressure-bearing piston (7) inner chamber on pressure-bearing piston (7).
2. the pressure-bearing piston that is applicable to 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 of letting out sand body, and lets out sand body between runner body and pressure-bearing piston body.
3. the pressure-bearing piston that is applicable to pressurized coring tool according to claim 2, it is characterized in that: the described sand body and runner body and pressure-bearing piston body let out is the integral type structure.
4. according to claim 2 or 3 described pressure-bearing piston that are applicable to pressurized coring tool, it is characterized in that: described sand outlet (18) radially is arranged on to be let out on sand body, and runner (19) is axially disposed within on the runner body.
5. the pressure-bearing piston that is applicable to pressurized coring tool according to claim 4 is characterized in that: described runner (19) is four and is groove shapes, and four runners (19) are evenly distributed on the runner body.
6. according to claim 2,3 or 5 described pressure-bearing piston that are applicable to pressurized coring tool, it is characterized in that: described sand outlet (18) is three, is evenly distributed on and lets out on sand body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220587568 CN202970567U (en) | 2012-11-09 | 2012-11-09 | Pressure-bearing piston for pressurized coring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220587568 CN202970567U (en) | 2012-11-09 | 2012-11-09 | Pressure-bearing piston for pressurized coring tool |
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| Publication Number | Publication Date |
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| CN202970567U true CN202970567U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220587568 Expired - Lifetime CN202970567U (en) | 2012-11-09 | 2012-11-09 | Pressure-bearing piston for pressurized coring tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202970567U (en) |
-
2012
- 2012-11-09 CN CN 201220587568 patent/CN202970567U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |