CN204299558U - Delayed start-up sliding sleeve - Google Patents

Delayed start-up sliding sleeve Download PDF

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Publication number
CN204299558U
CN204299558U CN201420718124.9U CN201420718124U CN204299558U CN 204299558 U CN204299558 U CN 204299558U CN 201420718124 U CN201420718124 U CN 201420718124U CN 204299558 U CN204299558 U CN 204299558U
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China
Prior art keywords
sliding sleeve
groove
hole
contact
internal fixtion
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CN201420718124.9U
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Chinese (zh)
Inventor
陈若铭
赵继斌
高本文
张军锋
卢明
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CNPC Xibu Drilling Engineering Co Ltd
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CNPC Xibu Drilling Engineering Co Ltd
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Abstract

<b> the utility model relates to Well Completion Engineering of Oil Reservoirs multiple fracturing device technical field, it is a kind of delayed start-up sliding sleeve, it comprises top connection, sliding sleeve, shear pin, crossover sub, retaining ring and lower contact, the upper end inwall of top connection is provided with the first annular protrusion, and the inwall of lower contact is provided with the second annular protrusion; The lower end inner wall of crossover sub and the upper end outer wall of lower contact are threaded connection; The upper end outer wall of crossover sub and the lower end inner wall of top connection are threaded connection; The upper surface of sliding sleeve is located on the lower surface of the first annular protrusion, the lower end of sliding sleeve is provided with axle journal, the middle part outer wall of axle journal is provided with the first mounting groove, and the first mounting groove internal fixtion is provided with retaining ring, and the upper inside wall of lower contact is provided with the limited ring groove that can match with retaining ring.The utility model has following features: the instantaneous pressure energy slow releasing produced when opening operational pressure; Sliding sleeve can not in work progress counter motion and the hole closed in top connection; Structure is simple, reliability is high.</b>

Description

Delayed start-up sliding sleeve
Technical field
the utility model relates to Well Completion Engineering of Oil Reservoirs multiple fracturing device technical field, is a kind of delayed start-up sliding sleeve.
Background technology
adopt the exceptional wells such as Multilateral Wells mixed and point to adopt, control in the construction operation processes such as water blocking water, reservoir reconstruction, often need to carry out staged fracturing to horizontal well or Multilateral Wells master, branch well hole different reservoir.Conventional control tool axially moves downward after opening and cutting off pin, causes that opening pressure is large, abrupt release pressure, and in tubing string, surge pressure is large, and the easy play of tubing string, affects the sealing of packer in pipe string.
Summary of the invention
the utility model provides a kind of delayed start-up sliding sleeve, overcome the deficiency of above-mentioned prior art, it effectively can solve existing control tool and open in the process of axial downward movement after shear pin and have that opening pressure is large, abrupt release pressure, in tubing string, surge pressure is large, the easy play of tubing string, affects the problem of the sealing of packer in pipe string.
the technical solution of the utility model is realized by following measures:
a kind of delayed start-up sliding sleeve, comprise top connection, sliding sleeve, shear pin, crossover sub, retaining ring and lower contact, the upper end inwall of top connection is provided with the first annular protrusion, and the inwall of lower contact is provided with the second annular protrusion; The lower end inner wall of crossover sub and the upper end outer wall of lower contact are threaded connection; The upper end outer wall of crossover sub and the lower end inner wall of top connection are threaded connection; The upper surface of sliding sleeve is located on the lower surface of the first annular protrusion, the lower end of sliding sleeve is provided with axle journal, the middle part outer wall of axle journal is provided with the first mounting groove, first mounting groove internal fixtion is provided with retaining ring, the upper inside wall of lower contact is provided with the limited ring groove that can match with retaining ring, the shaft shoulder end face of sliding sleeve to lower contact upper surface between distance and retaining ring upper surface to limited ring groove upper surface between distance corresponding; The lower inner wall of sliding sleeve is provided with a conical surface ball seat; The bottom outer wall of sliding sleeve is fixedly mounted on the middle part inwall of crossover sub by shear pin; The top of sliding sleeve is provided with the 3rd annular protrusion, and the lower surface of the 3rd annular protrusion, the middle part outer wall of sliding sleeve, the middle part inwall of top connection, the upper surface of crossover sub surround an annular oil cavity; The outer wall of top connection is provided with the oil filler point be connected with annular oil cavity, and oil filler point is installed with plug; The top connection corresponding with the 3rd annular protrusion is provided with fluid hole radially, and the inner of fluid hole is by the outer wall shutoff of the 3rd annular protrusion; The top of crossover sub is radially provided with the installing hole be communicated with annular oil cavity, it is stifled that installing hole internal fixtion is provided with pressure, pressure blocks the centre bore being provided with and being communicated with annular oil cavity, being provided with in centre bore can centrally hole valve rod in axial sliding, the middle part of valve rod is provided with the first radially protruding conical seal (contact) face, and the lower end inner wall of centre bore is provided with the second conical seal (contact) face matched with the first conical seal (contact) face; The below of installing hole is provided with first hole concentric with installing hole, the below in the first hole is provided with second hole concentric with the first hole, the bottom of valve rod is positioned at the first hole, the bottom outer wall of valve rod is provided with spring, the lower end in the first hole is provided with baffle ring, the upper end base of spring drops on the lower surface of the first annular sealing surface, and the lower end of spring is located on the upper surface of baffle ring; First hole is connected with the second hole by baffle ring; The top of crossover sub is radially provided with the 3rd hole be connected with the lower end in the second hole, and the 3rd hole is positioned at the top of shear pin.
here is the further optimization and/or improvements to above-mentioned utility model technical scheme:
above-mentioned first annular protrusion is provided with fluid hole for subsequent use radially, and fluid hole for subsequent use is installed with safe screw plug.
the above-mentioned outer wall being positioned at top connection above fluid hole for subsequent use is provided with the first outer groove, the outer wall being positioned at the top connection below fluid hole for subsequent use is provided with the second outer groove, first outer groove internal fixtion is provided with the first sealing ring, and the second outer groove internal fixtion is provided with the second sealing ring.
the above-mentioned outer wall being positioned at sliding sleeve above fluid hole is provided with the 3rd outer groove, and the outer wall being positioned at the sliding sleeve below fluid hole is provided with the 4th outer groove, and the 3rd outer groove internal fixtion is provided with the 3rd sealing ring, and the 4th outer groove internal fixtion is provided with the 4th sealing ring.
the outer wall of above-mentioned sliding sleeve between shear pin and the shaft shoulder is provided with the 5th outer groove and the 6th outer groove, the inwall in the conversion street corner between the upper surface of lower contact and the upper surface of the second annular protrusion is provided with the first inner groove and the second outer groove, 5th outer groove internal fixtion is provided with the 5th sealing ring, 6th outer groove internal fixtion is provided with the 6th sealing ring, first inner groove internal fixtion is provided with the 7th sealing ring, and the second inner groove internal fixtion is provided with the 8th sealing ring.
the utility model reasonable and compact in structure, easy to use, it is with tubing string G.I.H, pitching builds the pressure, and cuts off shear pin, and sliding sleeve is descending, retaining ring enters in the limited ring groove of lower contact, in the descending process of sliding sleeve, hydraulic oil pressure valve opening bar and spring, by the second hole and the discharge of the 3rd hole of crossover sub, volume is little, it is simple, easy to use to process, realize slowly opening, release moment opening pressure, eliminates surge pressure in pipe.
Accompanying drawing explanation
accompanying drawing 1 is that the master of the utility model most preferred embodiment looks half section structural representation.
accompanying drawing 2 is the structure for amplifying schematic diagram at A place in accompanying drawing 1.
coding in accompanying drawing is respectively: 1 is top connection, 2 is sliding sleeve, 3 is shear pin, 4 is crossover sub, 5 is retaining ring, 6 is lower contact, 7 is the first annular protrusion, 8 is the second annular protrusion, 9 is axle journal, 10 is fluid hole for subsequent use, 11 is safe screw plug, 12 is limited ring groove, 13 is the shaft shoulder, 14 is conical surface ball seat, 15 is the 3rd annular protrusion, 16 is annular oil cavity, 17 is oil filler point, 18 is plug, 19 is fluid hole, 20 is installing hole, 21 is stifled for pressing, hole centered by 22, 23 is valve rod, 24 is the first conical seal (contact) face, 25 is the ball that builds the pressure, 26 is the first hole, 27 is the second hole, 28 is spring, 29 is baffle ring, 30 is the 3rd hole, 31 is the first sealing ring, 32 is the second sealing ring, 33 is the 3rd sealing ring, 34 is the 4th sealing ring, 35 is the 5th sealing ring, 36 is the 6th sealing ring, 37 is the 7th sealing ring, 38 is the 8th sealing ring.
Detailed description of the invention
the utility model by the restriction of following embodiment, can not determine concrete embodiment according to the technical solution of the utility model and actual conditions.
in the utility model, for convenience of description, the description of the relative position relation of each parts is all be described according to the Butut mode of Figure of description 1, as: the position relationship of forward and backward, upper and lower, left and right etc. determines according to the Butut direction of Figure of description.
below in conjunction with embodiment and accompanying drawing, the utility model is further described:
as shown in accompanying drawing 1,2, this delayed start-up sliding sleeve comprises top connection 1, sliding sleeve 2, shear pin 3, crossover sub 4, retaining ring 5 and lower contact 6, and the upper end inwall of top connection 1 is provided with the first annular protrusion 7, and the inwall of lower contact 6 is provided with the second annular protrusion 8; The lower end inner wall of crossover sub 4 and the upper end outer wall of lower contact 6 are threaded connection; The upper end outer wall of crossover sub 4 and the lower end inner wall of top connection 1 are threaded connection; The upper surface of sliding sleeve 2 is located on the lower surface of the first annular protrusion 7, the lower end of sliding sleeve 2 is provided with axle journal 9, the middle part outer wall of axle journal 9 is provided with the first mounting groove, first mounting groove internal fixtion is provided with retaining ring 5, the upper inside wall of lower contact 6 is provided with the limited ring groove 12 that can match with retaining ring 5, the shaft shoulder 13 end face of sliding sleeve 2 to lower contact 6 upper surface between distance and retaining ring 5 upper surface to limited ring groove 12 upper surface between distance corresponding; The lower inner wall of sliding sleeve 2 is provided with a conical surface ball seat 14; The bottom outer wall of sliding sleeve 2 is fixedly mounted on the middle part inwall of crossover sub 4 by shear pin 3; The top of sliding sleeve 2 is provided with the lower surface of the 3rd annular protrusion the 15, three annular protrusion 15, the middle part outer wall of sliding sleeve 2, the middle part inwall of top connection 1, the upper surface of crossover sub 4 surround an annular oil cavity 16; The outer wall of top connection 1 is provided with the oil filler point 17 be connected with annular oil cavity 16, oil filler point 17 is installed with plug 18; The top connection 1 corresponding with the 3rd annular protrusion 15 is provided with fluid hole 19 radially, and the inner of fluid hole 19 is by the outer wall shutoff of the 3rd annular protrusion 15; The top of crossover sub 4 is radially provided with the installing hole 20 be communicated with annular oil cavity 16, installing hole 20 internal fixtion is provided with pressure stifled 21, pressure stifled 21 is provided with the centre bore 22 be communicated with annular oil cavity 16, being provided with in centre bore 22 can centrally hole 22 valve rod 23 in axial sliding, the middle part of valve rod 23 is provided with the first radially protruding conical seal (contact) face 24, and the lower end inner wall of centre bore 22 is provided with the second conical seal (contact) face matched with the first conical seal (contact) face 24; The below of installing hole 20 is provided with first hole 26 concentric with installing hole 20, the below in the first hole 26 is provided with second hole 27 concentric with the first hole 26, the bottom of valve rod 23 is positioned at the first hole 26, the bottom outer wall of valve rod 23 is provided with spring 28, the lower end in the first hole 26 is provided with baffle ring 29, the upper end base of spring 28 drops on the lower surface of the first annular sealing surface 24, and the lower end of spring 28 is located on the upper surface of baffle ring 29; First hole 26 is connected with the second hole 27 by baffle ring 29; The top of crossover sub 4 is radially provided with the top that the 3rd hole 30, hole the 30, three be connected with the lower end in the second hole 27 is positioned at shear pin 3.During work, first pass through oil filler point 17 to injection liquid force feed or water in annular oil cavity 16, then plug 18 is arranged on oil filler point 17, oil filler point 17 and annular oil cavity 16 are sealed, this delayed start-up sliding sleeve is with tubing string G.I.H, and drop into the ball 25 that builds the pressure, the ball 25 that builds the pressure is located on conical surface ball seat 14, builds the pressure, shear pin 3 is cut off, sliding sleeve 2 is descending, in the process that sliding sleeve 2 is descending, 3rd annular protrusion 15 is squeezed fluid force feed downwards, annular oil cavity 16 volume diminishes, hydraulic oil enters centre bore 22 and promotes valve rod 23, valve rod 23 moves downward and Compress Spring 28, first annular sealing surface 24 is separated with the second annular sealing surface, hydraulic oil enters the first hole 26, and enter the second hole 27 by baffle ring 29, finally flow out from the 3rd hole 30, spring 28 and hydraulic oil play a part to cushion time delay in the process that sliding sleeve 2 is descending, reduce pressure exciting in tubing string, prevent tubing string play, ensure the sealing of packer in pipe string, sliding sleeve 2 is descending put in place after, a part for retaining ring 5 is stuck in the first mounting groove, another part of retaining ring 5 is stuck in retaining ring 5 groove, sliding sleeve 2 is locked in lower contact 6, avoid sliding sleeve 2 counter motion, now, drilling fluid carries out fracturing work by fluid hole 19.
according to actual needs, above-mentioned delayed start-up sliding sleeve can be made further optimization and/or improvements:
as shown in Figure 1, above-mentioned first annular protrusion 7 is provided with fluid hole for subsequent use 10 radially, and fluid hole 10 for subsequent use is installed with safe screw plug 11.Like this, when sliding sleeve 2 lost efficacy, fracturing work can be carried out by fluid hole 10 for subsequent use, improves the security reliability of this delayed start-up sliding sleeve; Input builds the pressure after ball 25, and drilling liquid pressure starts to rise, and when reaching setting pressure, safe screw plug 11 is washed out, and drilling fluid is gone out fluid hole 10 for subsequent use and carried out fracturing work.
as shown in Figure 1, the above-mentioned outer wall being positioned at top connection 1 above fluid hole 10 for subsequent use is provided with the first outer groove, the outer wall being positioned at the top connection 1 below fluid hole 10 for subsequent use is provided with the second outer groove, first outer groove internal fixtion is provided with the first sealing ring 31, second outer groove internal fixtion and is provided with the second sealing ring 32.Like this, the sealing of fluid hole 10 for subsequent use can be improved.
as shown in Figure 1, the above-mentioned outer wall being positioned at sliding sleeve 2 above fluid hole 19 is provided with the 3rd outer groove, the outer wall being positioned at the sliding sleeve 2 below fluid hole 19 is provided with the 4th outer groove, and the 3rd outer groove internal fixtion is provided with the 3rd sealing ring the 33, four outer groove internal fixtion and is provided with the 4th sealing ring 34.Cut off at shear pin 3 like this, after sliding sleeve 2 is descending, the 3rd sealing ring 33 and the 4th sealing ring 34 can be ensured between fluid hole 19 and annular oil cavity 16, sealing between the inner and annular oil cavity 16 of sliding sleeve 2.
as shown in Figure 1, the outer wall of above-mentioned sliding sleeve 2 between shear pin 3 and the shaft shoulder 13 is provided with the 5th outer groove and the 6th outer groove, the inwall in the conversion street corner 4 between the upper surface of lower contact 6 and the upper surface of the second annular protrusion 8 is provided with the first inner groove and the second outer groove, 5th outer groove internal fixtion is provided with the 5th sealing ring 35,6th outer groove internal fixtion is provided with the 6th sealing ring 36, first inner groove internal fixtion is provided with the 7th sealing ring 37, second inner groove internal fixtion and is provided with the 8th sealing ring 38.Like this, the 5th sealing ring 35, the 6th sealing ring 36 can ensure the sealing between sliding sleeve 2 and crossover sub 4, and the 7th sealing ring 37 and the 8th sealing ring 38 can ensure the sealing between crossover sub 4 and lower contact 6.
above technical characteristic constitutes most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.

Claims (6)

1. a delayed start-up sliding sleeve, it is characterized in that comprising top connection, sliding sleeve, shear pin, crossover sub, retaining ring and lower contact, the upper end inwall of top connection is provided with the first annular protrusion, and the inwall of lower contact is provided with the second annular protrusion; The lower end inner wall of crossover sub and the upper end outer wall of lower contact are threaded connection; The upper end outer wall of crossover sub and the lower end inner wall of top connection are threaded connection; The upper surface of sliding sleeve is located on the lower surface of the first annular protrusion, the lower end of sliding sleeve is provided with axle journal, the middle part outer wall of axle journal is provided with the first mounting groove, first mounting groove internal fixtion is provided with retaining ring, the upper inside wall of lower contact is provided with the limited ring groove that can match with retaining ring, the shaft shoulder end face of sliding sleeve to lower contact upper surface between distance and retaining ring upper surface to limited ring groove upper surface between distance corresponding; The lower inner wall of sliding sleeve is provided with a conical surface ball seat; The bottom outer wall of sliding sleeve is fixedly mounted on the middle part inwall of crossover sub by shear pin; The top of sliding sleeve is provided with the 3rd annular protrusion, and the lower surface of the 3rd annular protrusion, the middle part outer wall of sliding sleeve, the middle part inwall of top connection, the upper surface of crossover sub surround an annular oil cavity; The outer wall of top connection is provided with the oil filler point be connected with annular oil cavity, and oil filler point is installed with plug; The top connection corresponding with the 3rd annular protrusion is provided with fluid hole radially, and the inner of fluid hole is by the outer wall shutoff of the 3rd annular protrusion; The top of crossover sub is radially provided with the installing hole be communicated with annular oil cavity, it is stifled that installing hole internal fixtion is provided with pressure, pressure blocks the centre bore being provided with and being communicated with annular oil cavity, being provided with in centre bore can centrally hole valve rod in axial sliding, the middle part of valve rod is provided with the first radially protruding conical seal (contact) face, and the lower end inner wall of centre bore is provided with the second conical seal (contact) face matched with the first conical seal (contact) face; The below of installing hole is provided with first hole concentric with installing hole, the below in the first hole is provided with second hole concentric with the first hole, the bottom of valve rod is positioned at the first hole, the bottom outer wall of valve rod is provided with spring, the lower end in the first hole is provided with baffle ring, the upper end base of spring drops on the lower surface of the first annular sealing surface, and the lower end of spring is located on the upper surface of baffle ring; First hole is connected with the second hole by baffle ring; The top of crossover sub is radially provided with the 3rd hole be connected with the lower end in the second hole, and the 3rd hole is positioned at the top of shear pin.
2. delayed start-up sliding sleeve according to claim 1, is characterized in that the first annular protrusion is provided with fluid hole for subsequent use radially, fluid hole for subsequent use is installed with safe screw plug.
3. delayed start-up sliding sleeve according to claim 2, it is characterized in that the outer wall of the top connection be positioned at above fluid hole for subsequent use is provided with the first outer groove, the outer wall being positioned at the top connection below fluid hole for subsequent use is provided with the second outer groove, first outer groove internal fixtion is provided with the first sealing ring, and the second outer groove internal fixtion is provided with the second sealing ring.
4. the delayed start-up sliding sleeve according to claim 1 or 2 or 3, it is characterized in that the outer wall of the sliding sleeve be positioned at above fluid hole is provided with the 3rd outer groove, the outer wall being positioned at the sliding sleeve below fluid hole is provided with the 4th outer groove, 3rd outer groove internal fixtion is provided with the 3rd sealing ring, and the 4th outer groove internal fixtion is provided with the 4th sealing ring.
5. the delayed start-up sliding sleeve according to claim 1 or 2 or 3, the outer wall that it is characterized in that the sliding sleeve between shear pin and the shaft shoulder is provided with the 5th outer groove and the 6th outer groove, the inwall in the conversion street corner between the upper surface of lower contact and the upper surface of the second annular protrusion is provided with the first inner groove and the second outer groove, 5th outer groove internal fixtion is provided with the 5th sealing ring, 6th outer groove internal fixtion is provided with the 6th sealing ring, first inner groove internal fixtion is provided with the 7th sealing ring, and the second inner groove internal fixtion is provided with the 8th sealing ring.
6. delayed start-up sliding sleeve according to claim 4, the outer wall that it is characterized in that the sliding sleeve between shear pin and the shaft shoulder is provided with the 5th outer groove and the 6th outer groove, the inwall in the conversion street corner between the upper surface of lower contact and the upper surface of the second annular protrusion is provided with the first inner groove and the second outer groove, 5th outer groove internal fixtion is provided with the 5th sealing ring, 6th outer groove internal fixtion is provided with the 6th sealing ring, first inner groove internal fixtion is provided with the 7th sealing ring, and the second inner groove internal fixtion is provided with the 8th sealing ring.
CN201420718124.9U 2014-11-26 2014-11-26 Delayed start-up sliding sleeve Active CN204299558U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104329073A (en) * 2014-11-26 2015-02-04 中国石油集团西部钻探工程有限公司 Delay-to-open sliding sleeve
CN108361004A (en) * 2018-02-01 2018-08-03 成都众智诚成石油科技有限公司 A kind of remote RF ID controls self-sealing pressure difference sliding sleeve
CN108361003A (en) * 2018-02-01 2018-08-03 成都众智诚成石油科技有限公司 A kind of automatic opening self-sealing underground pressure difference sliding sleeve
CN108571300A (en) * 2017-03-13 2018-09-25 中国石油化工股份有限公司 Build the pressure device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104329073A (en) * 2014-11-26 2015-02-04 中国石油集团西部钻探工程有限公司 Delay-to-open sliding sleeve
CN104329073B (en) * 2014-11-26 2017-02-22 中国石油集团西部钻探工程有限公司 Delay-to-open sliding sleeve
CN108571300A (en) * 2017-03-13 2018-09-25 中国石油化工股份有限公司 Build the pressure device
CN108361004A (en) * 2018-02-01 2018-08-03 成都众智诚成石油科技有限公司 A kind of remote RF ID controls self-sealing pressure difference sliding sleeve
CN108361003A (en) * 2018-02-01 2018-08-03 成都众智诚成石油科技有限公司 A kind of automatic opening self-sealing underground pressure difference sliding sleeve

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