CN104141471A - Sealing method for adjustable blanking plug in eccentric water distributor and sealing structure of adjustable blanking plug in eccentric water distributor - Google Patents
Sealing method for adjustable blanking plug in eccentric water distributor and sealing structure of adjustable blanking plug in eccentric water distributor Download PDFInfo
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- CN104141471A CN104141471A CN201310169802.0A CN201310169802A CN104141471A CN 104141471 A CN104141471 A CN 104141471A CN 201310169802 A CN201310169802 A CN 201310169802A CN 104141471 A CN104141471 A CN 104141471A
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Abstract
The invention discloses a sealing method for an adjustable blanking plug in an eccentric water distributor and a sealing structure of the adjustable blanking plug in the eccentric water distributor. The method includes that sealing parts are additionally arranged at two ends of a valve stem to achieve complete sealing between a water outlet hole B and a water inlet hole A of the eccentric water distributor, so that swellable sealing requirement of a packer is met; the sealing part at one end of the valve stem sleeves the valve stem by positioning through a groove of a valve sleeve, and the sealing part at the other end of the valve steam is positioned through a groove of a filtering cap and butts against the end face of a water nozzle of the valve stem. The sealing method and the sealing structure have the advantages that the opening diameter of the water nozzle can be adjusted to be minimum before the packer descends a well, so that the swellable sealing requirement of the packer is met; after swelling for sealing, the packer descends into a water quantity regulation device for flow regulation directly, and replacement of the blanking plug is unneeded; expenses for purchasing imperforated blanking plugs are saved, time for blanking plug replacement is saved, working efficiency can be improved effectively for oil fields, and production cost is lowered.
Description
Technical field
the present invention relates to encapsulating method and the structure of adjustable blanking plug in a kind of eccentric injection mandrel, be particularly arranged on encapsulating method and the structure of the adjustable blanking plug in the eccentric injection mandrel of water injection well in oil fields, belong to oil field blanking plug technical field.
Background technology
the packer majority using in water injection well in oil fields is now the envelope formula that rises of pressurizeing.After every subjob, need to add hydraulic pressure from inside, utilize inside and outside differential pressure to make the packer envelope that rises, realize predetermined function.This just needs can seal completely between the water outlet B of injection well downhole flow regulator 9 and water inlet A.But existing adjustable blanking plug, in order to realize flow regulating function, adopts matched in clearance between valve rod 4 and water nozzle 5, also there is micro-Seepage after being adjusted to lowest calibre.Cause can not sealing completely between the water outlet B of injection well downhole flow regulator 9 and water inlet A, packer inside and outside differential pressure does not reach predetermined value, and the packer envelope that can not reliably rise, affects the realization of predetermined function.For fear of occurring this phenomenon, nonadjustable atresia blanking plug can only be first used in oil field when operation, treats that packer rises to be honored as a queen to be replaced by adjustable blanking plug again.The workload in oil field and the expense of buying atresia blanking plug have been increased.
Summary of the invention
the object of the invention is to, encapsulating method and the structure of adjustable blanking plug in a kind of eccentric injection mandrel is provided, can reduce the workload that blanking plug is changed in oil field, save the expense of buying atresia blanking plug.To overcome the deficiencies in the prior art.
technical scheme of the present invention:
an encapsulating method for adjustable blanking plug in eccentric injection mandrel, the method is to set up seal at valve rod two ends, to realize sealing completely between eccentric injection mandrel weep hole B and inlet opening A, meets the envelope requirement of rising of packer; The seal of valve rod one end passes through the groove positioning sleeve of valve pocket on valve rod; The seal of the valve rod other end is located by the groove of filter cap, withstands on the water nozzle end face of valve rod.
in preceding method, described seal adopts self sealss cushion rubber, and when eccentric injection mandrel internal pressure increases, the contact between self sealss cushion rubber and valve rod also increases thereupon, to guarantee sealing reliability; When eccentric injection mandrel internal pressure reduces, the contact between self sealss cushion rubber and valve rod also reduces thereupon, damages seal while moving to prevent that valve rod is round.
in preceding method, the decrement of described self sealss cushion rubber need be controlled at below 25%, relies on packer to suppress the high speed impact pressure rising while sealing and realizes self sealss.
in preceding method, the decrement of described self sealss cushion rubber need be controlled at below 15%, relies on packer to suppress the high speed impact pressure rising while sealing and realizes self sealss.
the adjustable blanking plug hermetically-sealed construction forming according to preceding method, comprises eccentric injection mandrel, and eccentric injection mandrel is provided with inlet opening A, and A middle part in inlet opening is provided with weep hole B; In the A of inlet opening, be provided with valve pocket, valve pocket and weep hole B correspondence position are provided with water nozzle, are provided with valve rod in valve pocket, are matched in clearance between valve rod and water nozzle; Valve pocket one end is provided with filter cap; The cooperation place of described valve pocket one end and valve rod is provided with valve pocket seal; The cooperation place of valve rod one end and filter cap is provided with filter cap seal.
in aforementioned structure, described filter cap is threaded with valve pocket.
in aforementioned structure, described valve pocket seal and filter cap seal are self sealss cushion rubber.
in aforementioned structure, the decrement of described self sealss cushion rubber is less than 25%.
in aforementioned structure, the decrement of described self sealss cushion rubber is less than 15%.
in aforementioned structure, between described valve pocket and filter cap and inlet opening A, be respectively equipped with sealing ring; Between filter cap and valve pocket, be provided with thread seal part.
compared with prior art, the present invention can first be adjusted to minimum by water nozzle bore before going into the well, and meets the packer envelope requirement of rising.Treat that packer rises and be honored as a queen, be directly lowered to water-quantity regulating device and carry out Flow-rate adjustment, do not need to change blanking plug.Saved the expense of buying atresia blanking plug, saved the time of changing blanking plug simultaneously, can effectively improve field operations efficiency, reduced production costs.
Accompanying drawing explanation
fig. 1 is structural representation of the present invention (sealing state);
fig. 2 is structural representation of the present invention (non-tight state);
fig. 3 is the structural representation of prior art.
being labeled as in accompanying drawing: 1-valve pocket seal, 2-valve pocket, 3-sealing ring, 4-valve rod, 5-water nozzle, 6-filter cap seal, 7-filter cap, 8-thread seal part, 9-eccentric injection mandrel.
The specific embodiment
below in conjunction with accompanying drawing, the present invention is described in further detail, but not as any limitation of the invention.
fig. 3 is the structural representation of prior art, does not establish valve pocket seal 1 and filter cap seal 6 in Fig. 3, and owing to being matched in clearance between valve rod 4 and water nozzle 5, valve rod also exists micro-Seepage after being adjusted to the end.Cause can not sealing completely between the weep hole B of eccentric injection mandrel 9 and inlet opening A, packer inside and outside differential pressure does not reach predetermined value, and the packer envelope that can not reliably rise, affects the realization of predetermined function.
the encapsulating method of adjustable blanking plug in eccentric injection mandrel provided by the invention, as depicted in figs. 1 and 2.The method is to set up seal at valve rod two ends, to realize sealing completely between eccentric injection mandrel weep hole B and inlet opening A, meets the envelope requirement of rising of packer; The seal of valve rod one end passes through the groove positioning sleeve of valve pocket on valve rod; The seal of the valve rod other end is located by the groove of filter cap, withstands on the water nozzle end face of valve rod.Described seal adopts self sealss cushion rubber, and when eccentric injection mandrel internal pressure increases, the contact between self sealss cushion rubber and valve rod also increases thereupon, to guarantee sealing reliability; When eccentric injection mandrel internal pressure reduces, the contact between self sealss cushion rubber and valve rod also reduces thereupon, damages seal while moving to prevent that valve rod is round.The decrement of described self sealss cushion rubber need be controlled at below 25%, relies on packer to suppress the high speed impact pressure rising while sealing and realizes self sealss.The decrement of described self sealss cushion rubber need be controlled at below 15%, relies on packer to suppress the high speed impact pressure rising while sealing and realizes self sealss.
the adjustable blanking plug hermetically-sealed construction forming according to preceding method, as depicted in figs. 1 and 2.Comprise eccentric injection mandrel 9, eccentric injection mandrel 9 is provided with inlet opening A, and A middle part in inlet opening is provided with weep hole B; In the A of inlet opening, be provided with valve pocket 2, valve pocket 2 is provided with water nozzle 5 with weep hole B correspondence position, is provided with valve rod 4 in valve pocket 2, between valve rod 4 and water nozzle 5, is matched in clearance; Valve pocket 2 one end are provided with filter cap 7; Filter cap 7 is threaded with valve pocket 2.The cooperation place of valve pocket 2 one end and valve rod 4 is provided with valve pocket seal 1; The cooperation place of valve rod 4 one end and filter cap 7 is provided with filter cap seal 6.Valve pocket seal 1 and filter cap seal 6 are self sealss cushion rubber.The decrement of self sealss cushion rubber is less than 25%.The optimal compression amount of self sealss cushion rubber is less than 15%.Between described valve pocket 2 and filter cap 7 and inlet opening A, be respectively equipped with sealing ring 3; Between filter cap 7 and valve pocket 2, be provided with thread seal part 8.
structural representation when Fig. 2 is non-tight state of the present invention, as seen from Figure 2, in figure, filter cap seal 6 is left in the left side of valve rod 4, and filter cap seal 6 is in non-tight state, and the water of inlet opening A can flow out from weep hole B by filter cap 7 and water nozzle 5.Movement by valve rod 4 can regulating water flow.
structural representation when Fig. 1 is sealing state of the present invention, as seen from Figure 1, in figure, the left end of valve rod 4 is through in filter cap seal 6, and filter cap seal 6 is in sealing state, and the water of inlet opening A cannot flow out from weep hole B by filter cap 7 and water nozzle 5.Realize sealing completely between eccentric injection mandrel weep hole B and inlet opening A, can meet the envelope requirement of rising of packer.
Embodiment
during concrete enforcement, on the basis of " a kind of blanking plug " that the patent No. that can apply on September 16th, 2003 the patentee is ZL03135863.2, improve.Also can completely newly manufacture.In valve pocket 2 and filter cap 7, processing is for locating the groove of self sealss cushion rubber, after the groove inner sleeve upper valve sleeve seal 1 of valve pocket 2, pack valve rod 4 into, and then packing water nozzle 5 into, " water faucet for adjustable plugging device " that the patent No. that water nozzle 5 can be applied on December 3rd, 2008 by the patentee is ZL200810305926.6 processed.In the groove of filter screen 7, install after filter cap seal 6, filter cap 7 is screwed in to valve pocket 2.
for reducing difficulty of processing, " Split adjustable packer casing " that the patent No. that valve pocket 2 can be applied on December 3rd, 2008 by the patentee is ZL200820303070.4 carries out parts processing.For preventing that valve rod 4 from coming and going mobile valve pocket seal 1 and the filter cap seal 6 of damaging, the decrement of valve pocket seal 1 and filter cap seal 6 need be controlled at below 25%, is preferably controlled at below 15%, relies on the high speed pressure of suppressing while rising by envelope to impact and realizes self sealss in addition.
Claims (10)
1. an encapsulating method for adjustable blanking plug in eccentric injection mandrel, is characterized in that: the method is to set up seal at valve rod two ends, to realize sealing completely between eccentric injection mandrel weep hole B and inlet opening A, meets the envelope requirement of rising of packer; The seal of valve rod one end passes through the groove positioning sleeve of valve pocket on valve rod; The seal of the valve rod other end is located by the groove of filter cap, withstands on the water nozzle end face of valve rod.
2. method according to claim 1, is characterized in that: described seal adopts self sealss cushion rubber, and when eccentric injection mandrel internal pressure increases, the contact between self sealss cushion rubber and valve rod is increase thereupon also, to guarantee sealing reliability; When eccentric injection mandrel internal pressure reduces, the contact between self sealss cushion rubber and valve rod also reduces thereupon, damages seal while moving to prevent that valve rod is round.
3. method according to claim 2, is characterized in that: the decrement of described self sealss cushion rubber need be controlled at below 25%, and the high speed impact pressure while relying on packer to suppress to rise by envelope is realized self sealss.
4. method according to claim 3, is characterized in that: the decrement of described self sealss cushion rubber need be controlled at below 15%, and the high speed impact pressure while relying on packer to suppress to rise by envelope is realized self sealss.
5. the adjustable blanking plug hermetically-sealed construction forming according to method described in the arbitrary claim of claim 1-4, comprises eccentric injection mandrel (9), and eccentric injection mandrel (9) is provided with inlet opening A, and A middle part in inlet opening is provided with weep hole B; In the A of inlet opening, be provided with valve pocket (2), valve pocket (2) is provided with water nozzle (5) with weep hole B correspondence position, is provided with valve rod (4) in valve pocket (2), between valve rod (4) and water nozzle (5), is matched in clearance; Valve pocket (2) one end is provided with filter cap (7); It is characterized in that: the cooperation place of described valve pocket (2) one end and valve rod (4) is provided with valve pocket seal (1); The cooperation place of valve rod (4) one end and filter cap (7) is provided with filter cap seal (6).
6. structure according to claim 5, is characterized in that: described filter cap (7) is threaded with valve pocket (2).
7. structure according to claim 5, is characterized in that: described valve pocket seal (1) and filter cap seal (6) are self sealss cushion rubber.
8. structure according to claim 7, is characterized in that: the decrement of described self sealss cushion rubber is less than 25%.
9. structure according to claim 8, is characterized in that: the decrement of described self sealss cushion rubber is less than 15%.
10. structure according to claim 5, is characterized in that: between described valve pocket (2) and filter cap (7) and inlet opening A, be respectively equipped with sealing ring (3); Between filter cap (7) and valve pocket (2), be provided with thread seal part (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310169802.0A CN104141471A (en) | 2013-05-10 | 2013-05-10 | Sealing method for adjustable blanking plug in eccentric water distributor and sealing structure of adjustable blanking plug in eccentric water distributor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310169802.0A CN104141471A (en) | 2013-05-10 | 2013-05-10 | Sealing method for adjustable blanking plug in eccentric water distributor and sealing structure of adjustable blanking plug in eccentric water distributor |
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| Publication Number | Publication Date |
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| CN104141471A true CN104141471A (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310169802.0A Pending CN104141471A (en) | 2013-05-10 | 2013-05-10 | Sealing method for adjustable blanking plug in eccentric water distributor and sealing structure of adjustable blanking plug in eccentric water distributor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050103497A1 (en) * | 2003-11-17 | 2005-05-19 | Michel Gondouin | Downhole flow control apparatus, super-insulated tubulars and surface tools for producing heavy oil by steam injection methods from multi-lateral wells located in cold environments |
| CN2856397Y (en) * | 2005-12-20 | 2007-01-10 | 大庆油田有限责任公司 | Constant flow regulatable obturator |
| CN202250000U (en) * | 2011-10-23 | 2012-05-30 | 董力维 | Cone-shaped internal adjusting water faucet |
| CN202596693U (en) * | 2012-05-15 | 2012-12-12 | 中国石油天然气股份有限公司 | Stepless differential adjusting closed water tap plug |
| CN203257374U (en) * | 2013-05-10 | 2013-10-30 | 贵州航天凯山石油仪器有限公司 | Leakproof structure of adjustable blanking plug in eccentric water distributor |
-
2013
- 2013-05-10 CN CN201310169802.0A patent/CN104141471A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050103497A1 (en) * | 2003-11-17 | 2005-05-19 | Michel Gondouin | Downhole flow control apparatus, super-insulated tubulars and surface tools for producing heavy oil by steam injection methods from multi-lateral wells located in cold environments |
| CN2856397Y (en) * | 2005-12-20 | 2007-01-10 | 大庆油田有限责任公司 | Constant flow regulatable obturator |
| CN202250000U (en) * | 2011-10-23 | 2012-05-30 | 董力维 | Cone-shaped internal adjusting water faucet |
| CN202596693U (en) * | 2012-05-15 | 2012-12-12 | 中国石油天然气股份有限公司 | Stepless differential adjusting closed water tap plug |
| CN203257374U (en) * | 2013-05-10 | 2013-10-30 | 贵州航天凯山石油仪器有限公司 | Leakproof structure of adjustable blanking plug in eccentric water distributor |
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Application publication date: 20141112 |