CN202578625U - Hydraulic control drilling-free type well cementation grading hoop - Google Patents
Hydraulic control drilling-free type well cementation grading hoop Download PDFInfo
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- CN202578625U CN202578625U CN 201220061344 CN201220061344U CN202578625U CN 202578625 U CN202578625 U CN 202578625U CN 201220061344 CN201220061344 CN 201220061344 CN 201220061344 U CN201220061344 U CN 201220061344U CN 202578625 U CN202578625 U CN 202578625U
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- plug
- sliding sleeve
- sleeve
- upper sliding
- plug seat
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Abstract
The utility model discloses a hydraulic control drilling-free type well cementation grading hoop which comprises an upper joint (1), an outer sleeve (2), a pressure cap (4), a rubber plug seat (5), a pre-tightening spiral spring (6), an upper sliding sleeve (10), a lower sliding sleeve (16) and a lower joint (17), wherein a rubber plug barrel (13) is used for cutting a pin group (7), the rubber plug seat (5) and the rubber plug barrel (13) are connected, then the pre-tightening spiral spring (6) is arranged on the rubber plug seat (5) in an assembled mode, the pressure cap (4) is connected to the upper sliding sleeve (10), so that an upper sliding sleeve assembly is formed. An outer sleeve and upper joint separated O-shaped seal ring (3) is arranged inside the upper joint (1), and an outer sleeve and lower joint separated O-shaped seal ring (18) is arranged inside the lower joint (17). When work is completed, compared with a general grading hoop well cementation, a drilling tool combination does not need placing to drill grading hoop accessories remained on a grading hoop position, occupied and work time of a drilling machine can be reduced, and design of inner drift diameter requirements inside a sleeve tube is maintained.
Description
Technical field
The utility model relates to a kind of hydraulic controlling type and exempts from brill type well cementation sizing collar, is a kind of special tool that is applied to oil gas well classification well cementation, is a kind of special tool of alternative tradition well cementation sizing collar.
Background technology
The generic hierarchical hoop of widely applying at present is after the recementing well cementing operation; The sizing collar position retains plug and plug seat; Usually need to use φ 88.9mm drilling rod to be lowered to the drill set bench drill after the φ 139.7mm production casing classification well cementation commonly used and fall plug and plug seat, just can carry out follow-up completion practice then.
At present existingly exempt to bore the sizing collar cementing technology, after accomplishing the two-stage cementing operation, plug and plug seat in the sizing collar have mainly adopted following two kinds of whereabouts modes: first kind, the drifting of employing completion flow string is disclosed plug and plug seat and is dropped down onto the shaft bottom; Second kind,, drive plug and plug seat and fall to the shaft bottom with the gravity plug of perforate.Early stage first kind of mode of using still needs the lower tubular column drifting more; The success rate that the plug of the second way and plug seat drop to the shaft bottom voluntarily remains further to be improved.
Summary of the invention
Exempt to bore sizing collar plug and plug seat drop to the shaft bottom voluntarily in well liquid success rate in order further to improve, what the utility model patent provided the novel combination type structure exempts to bore sizing collar low sleeve, upper sliding sleeve, plug tube and plug seat.
Brill type well cementation sizing collar is exempted from a kind of hydraulic control; Comprise top connection (1), overcoat (2), pressure cap (4), plug seat (5), pretension helical spring (6), upper sliding sleeve (10), low sleeve (16), lower contact (17); Pack in its external sleeve (2) low sleeve (16) and upper sliding sleeve (10) use upper sliding sleeve shear pin group (9), low sleeve shear pin group (15) to be fixed on the overcoat (2) respectively; With plug tube shear pin group (7) plug seat (5) is connected with plug tube (13), on plug seat (5), assembles pretension helical spring (6) again, be connected on the upper sliding sleeve (10), constitute the upper sliding sleeve assembly with pressure cap (4); Insert O RunddichtringO (3) between overcoat and top connection in the top connection (1), insert O RunddichtringO (18) between overcoat and lower contact in the lower contact (17).
Low sleeve in the utility model is that perforate sliding sleeve, upper sliding sleeve are to close the hole sliding sleeve, is used for the opening and closing of secondary cementing circulation port.After one-level well cementation bruising; Continuation is forced into design load in sleeve pipe, the lower end fluid power compression area of low sleeve is greater than the upper end compression area, and the pipe internal pressure produces thrust upwards to low sleeve; Perforate pin group is cut off; Low sleeve is up to be coupled as one with upper sliding sleeve, and the sizing collar circulation port is opened, and can begin the secondary well cementing operation; After secondary cementing slurry is accomplished; Be pressed into and close plug, circulation displacement fluid, when closing after plug falls into the plug tube, circulation canal is blocked; Close the rubber shirt rim of plug and shrink the custom-designed plug tube of entering; Continue to pump into displacement fluid and impel the sleeve pipe internal pressure to be elevated to design load, the pin group of closing on the upper sliding sleeve is cut off, the descending together circulation port of closing of upper and lower sliding sleeve; The plug tube is that shear pin is connected with the plug seat; When closing after plug falls into the plug tube, continue to pump into displacement fluid, pressure continues to raise; Being connected pin between plug tube and plug seat is cut off; Plug and plug tube fall in well liquid voluntarily, and plug seat disintegration simultaneously is six lobes, in well liquid, falls to the shaft bottom voluntarily.Plug tube external diameter in the utility model is less than the casing inner diameter certain value, and design gaps has guaranteed that the plug tube can fall to the shaft bottom with closing plug in well liquid; When the plug tube was connected pin and is cut with the plug seat after, six lobe combined type plug seats were under the effect of prefastening force spring, and inwardly crumple is disintegrated, and the plug seat falls to the shaft bottom voluntarily in well liquid.
The characteristic feature of the utility model patent is: cancelled structural perforate plug of traditional sizing collar and perforate obturating plug, and simple in structure.Close plug and be compressed entering plug tube, guaranteed metal plug tube and closed plug in sleeve pipe, to fall to the shaft bottom voluntarily.The plug seat adopts six lobe combining structures, falls behind when the plug tube is sheared down, and it is six lobes that the inside crumple of plug seat is disintegrated, and in well liquid, falls voluntarily.Realize that annex is sheared in the latus rectum in all sizing collars, well voluntarily falls in well liquid.
For the stage cementing well cementing operation; Brill type well cementation sizing collar is exempted from a kind of hydraulic control of the utility model, can substitute traditional sizing collar, should " a kind of hydraulic control exempt from brill type cement the well sizing collar " sleeve design latus rectum after operation is accomplished interior plug seat, closes annexes such as plug, the plug tube well that can in well liquid, fall voluntarily; The pit shaft latus rectum that keeps requirement; Exempt brill sizing collar plug, the operation of plug seat of traditional classification well cementation, reduce rig and take and the activity duration, practice thrift cost.
Use a kind of hydraulic control of the present invention to exempt from brill type well cementation sizing collar, the well cementing operation program is identical with traditional sizing collar well cementing operation, carries out the one-level cementing earlier, replaces cement paste; For under hydraulic action, opening circulation port after the slurry completion, carry out the secondary cementing job; Input is closed plug after having annotated the secondary cement paste; Plug arrives the plug seat in the sizing collar; The dependence hydraulic action is closed sizing collar bypass circulation port, hydraulic cutter falls the plug tube; The crumple of combined type plug seat is disintegrated, and particular design has guaranteed sizing collar plug, plug tube, the plug seat well that under action of gravity, in well liquid, can freely fall.Use " brill type well cementation sizing collar is exempted from a kind of hydraulic control " then no longer need be lowered to drilling tool and bore the plug operation, can reduce drillng operation and rig holding time, shorten well construction period, practice thrift operating cost.Special exempt to bore the sizing collar design and guaranteed that the classification well cementation has and exempt to bore the operation high reliability, is that the classification cementing technology develops new direction.
Description of drawings
Fig. 1 is that brill type well cementation sizing collar section of structure is exempted from hydraulic control.
Fig. 2 is that brill type well cementation sizing collar partial enlarged drawing is exempted from hydraulic control of the present invention;
Fig. 3 is a plug holder structure lateral view.
Fig. 4 is a plug holder structure vertical view.
Fig. 5 is a plug barrel structure sketch map.
Wherein, 1-top connection, 2-overcoat, O RunddichtringO between 3-overcoat and top connection; 4-pressure cap 5-plug seat 6-pretension helical spring 7 plug tube shear pin group 8-upper sliding sleeve locking device 9-upper sliding sleeve shear pin groups, 10-upper sliding sleeve, 11-low sleeve locking device, 12-low sleeve top O RunddichtringO; 13 plug tubes, 14 low sleeve bottom O RunddichtringOs, 15-low sleeve shear pin group, 16-low sleeve; The 17-lower contact, O RunddichtringO between 18-overcoat and lower contact, 19-upper sliding sleeve O RunddichtringO.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is elaborated.
With reference to figure 1 and Fig. 2; Hydraulic control of the present invention is exempted from brill type well cementation sizing collar and is comprised: top connection 1, overcoat 2, pressure cap 4, plug seat 5, pretension helical spring 6, upper sliding sleeve 10, low sleeve 16, lower contact 17, sliding sleeve locking device, plug tube, shear pin, " O " RunddichtringO etc.; Be used for upper and lower joint and overcoat comprising a plurality of specifications " O " RunddichtringO; Between upper and lower sliding sleeve; And the sealing of upper and lower sliding sleeve and outer inner room, successively just be designed with low sleeve, upper sliding sleeve, plug tube totally 3 groups of different sizes pins according to operation by design shearing work hydraulic coupling.
The assembling of instrument: pack in its external sleeve 2 low sleeve 16 and upper sliding sleeve 10; Low sleeve 16 installs low sleeve top O RunddichtringO 12, low sleeve bottom O RunddichtringO 14 and low sleeve locking device 11 in advance; Upper sliding sleeve 10 installs upper sliding sleeve " O " RunddichtringO 19 and upper sliding sleeve locking device 8 in advance, is fixed on the overcoat 2 with upper sliding sleeve shear pin 9, low sleeve shear pin 15 respectively; The plug tube shear pin group of forming with 6 pins 7 is connected plug seat 5 with plug tube 13, on plug seat 5, assemble pretension helical spring 6 again, is connected on the upper sliding sleeve 10 with pressure cap 4, constitutes the upper sliding sleeve assembly; Insert O RunddichtringO 3 between overcoat and top connection in the top connection 1, insert in the lower contact 17 between overcoat and lower contact behind the O RunddichtringO 18, respectively with being threadedly connected to two ends; During joining, the pin assembling notes using airtight and watertight padding and fluid sealant.
Upper sliding sleeve locking device 8 has wherein adopted on outer casing inner wall cylinder and the sliding sleeve processes the conical surface, assembles the fit system of steel ball therein; Low sleeve locking device 11 has also adopted same spline structure.11 of low sleeve locking devices allow low sleeve 16 up, are locked as one to upper and lower sliding sleeve after the up perforate; Upper and lower sliding sleeve is descending together in the process of hole, 8 permission passes of upper sliding sleeve locking device, limits up.
Brill type well cementation sizing collar is exempted from above-mentioned hydraulic control be connected in the bunch tube design attitude as casing nipple, top connection 1 connects upper sleeve, and lower contact 17 connects parts casing pipe down, with the sleeve pipe G.I.H.After the one-level well cementing operation replaces bruising, continue to be forced into design pressure, in well liquid; The upper sealing gasket 12 and the lower seal circle 14 of low sleeve 16 cause the lower end bearing area of low sleeve 16 in sleeve pipe greater than the upper end bearing area; Low sleeve perforate pin group 15 is cut off, and low sleeve 16 is up to be connected as one with upper sliding sleeve 10, is designed with 4～6 circulation through hole bypass casing annuluss on the overcoat 2; Circulation port (as being denoted as 4 * φ 32 among Fig. 1) is opened, and realizes the circulation of sleeve pipe; Beginning second level well cementing operation; After having annotated second level cement paste, be pressed into and close plug, pump into displacement fluid and drive and to close plug and come downwards to plug seat 5; Close plug and be pressed into plug tube 13; Continue to be forced into upper sliding sleeve and close hole pin group 9 and cut off, upper sliding sleeve 10, low sleeve 16 are descending together, close the circulation port on the overcoat 2; Continue pressurization, plug seat pin nail group 7 is cut off, and closes plug and plug tube 13 and breaks away from plug seat 5, in well liquid, falls to the shaft bottom voluntarily; After plug seat pin nail group 7 is cut off, close plug and plug tube 13 and break away from plug seat 5, plug seat 5 is under the effect of pretension helical spring 6, and inwardly the crumple disintegration is six lobes, in well liquid, drops down onto the shaft bottom voluntarily.Guarantee to close plug, plug tube (13) and plug seat 5 on the size design and can fall to the shaft bottom voluntarily; Well voluntarily falls in well liquid after just all annexes are sheared in the latus rectum in the sizing collar; Realize exempting to bore plug after the classification well cementation, and keep desired design latus rectum.
In Fig. 3, Fig. 4; Plug seat 5 is six lobe fabricated structures; After plug seat pin nail group 7 was cut, plug tube 13 broke away from plug seat 5, and plug seat 5 is under the tightening force effect of the pretension helical spring 6 that is arranged in plug seat 5 outside grooves; Inwardly the crumple disintegration is six lobes, in well liquid, falls to the shaft bottom voluntarily.
In Fig. 5; Plug tube 13 is the cylinder-like structure of external diameter less than casing inner diameter; When closing after plug is pressed into plug tube 13, the rubber shirt rim of closing plug is extruded to shrink and gets in the plug cover 13, closes plug and plug and overlaps one and coexist and fall to the shaft bottom voluntarily in the well liquid.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention according to above-mentioned explanation.
Claims (3)
1. brill type well cementation sizing collar is exempted from a hydraulic control; It is characterized in that; Comprise top connection (1), overcoat (2), pressure cap (4), plug seat (5), pretension helical spring (6), upper sliding sleeve (10), low sleeve (16), lower contact (17); Pack in its external sleeve (2) low sleeve (16) and upper sliding sleeve (10) use upper sliding sleeve shear pin group (9), low sleeve shear pin group (15) to be fixed on the overcoat (2) respectively; With plug tube shear pin group (7) plug seat (5) is connected with plug tube (13), on plug seat (5), assembles pretension helical spring (6) again, be connected on the upper sliding sleeve (10), constitute the upper sliding sleeve assembly with pressure cap (4); Insert O RunddichtringO (3) between overcoat and top connection in the top connection (1), insert O RunddichtringO (18) between overcoat and lower contact in the lower contact (17).
2. brill type well cementation sizing collar is exempted from hydraulic control according to claim 1; It is characterized in that; Be designed with low sleeve top O RunddichtringO (12), low sleeve bottom O RunddichtringO (14) and low sleeve locking device (11) on the said low sleeve (16), be designed with upper sliding sleeve O RunddichtringO (19) and upper sliding sleeve locking device (8) on the upper sliding sleeve (10).
3. brill type well cementation sizing collar is exempted from hydraulic control according to claim 1; It is characterized in that; Said plug seat (5) is six pigtail fabricated structures, and after being connected pin between plug tube (13) and plug seat and being sheared, plug seat (5) is under the effect of pretension helical spring (6); Inwardly the crumple disintegration is 6 lobes, in well liquid, falls to the shaft bottom voluntarily.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220061344 CN202578625U (en) | 2012-02-21 | 2012-02-21 | Hydraulic control drilling-free type well cementation grading hoop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220061344 CN202578625U (en) | 2012-02-21 | 2012-02-21 | Hydraulic control drilling-free type well cementation grading hoop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202578625U true CN202578625U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220061344 Expired - Fee Related CN202578625U (en) | 2012-02-21 | 2012-02-21 | Hydraulic control drilling-free type well cementation grading hoop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202578625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422042A (en) * | 2015-12-10 | 2016-03-23 | 中国石油天然气股份有限公司 | Drilling-free two-stage cementing device |
-
2012
- 2012-02-21 CN CN 201220061344 patent/CN202578625U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422042A (en) * | 2015-12-10 | 2016-03-23 | 中国石油天然气股份有限公司 | Drilling-free two-stage cementing device |
| CN105422042B (en) * | 2015-12-10 | 2018-07-13 | 中国石油天然气股份有限公司 | One kind is exempted to bore two stage cementing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130221 |