CN201874513U - Sealing barrel for compression type packers for oil-gas fields - Google Patents
Sealing barrel for compression type packers for oil-gas fields Download PDFInfo
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- CN201874513U CN201874513U CN2010206388319U CN201020638831U CN201874513U CN 201874513 U CN201874513 U CN 201874513U CN 2010206388319 U CN2010206388319 U CN 2010206388319U CN 201020638831 U CN201020638831 U CN 201020638831U CN 201874513 U CN201874513 U CN 201874513U
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- pressure
- oil gas
- packing element
- gas field
- bearing sleeve
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Abstract
The utility model discloses a sealing barrel for compression type packers for oil-gas fields, which comprises a rubber barrel sleeved on a packer core, a pressure-bearing sleeve is arranged in the rubber barrel, annular grooves are circumferentially arranged on the inner wall of the pressure-bearing sleeve, and sealing rings are embedded in the annular grooves. When the sealing barrel is in use, the rubber barrel is pressed to radially expand, the outer surface of the expanded rubber barrel clings to a casing pipe of an oil-gas well to form axial seal, which can meet the operating requirement of a packer. After the sealing barrel is compressed for a certain distance, the pressure-bearing sleeve has a bearing effect to bear continuously increased pressure, so that the deformation of the rubber barrel can be prevented from continuing to increase to damage the rubber barrel, and thereby the pressure-bearing capability of the sealing barrel is greatly enhanced; in addition, by adding a PTFE (Polytetrafluoroethylene) outer sleeve and utilizing the high-temperature resistance, higher strength (in comparison with rubber), small static friction coefficient, corrosion resistance and other characteristics of the PTFE, the contact strength of the sealing surface can be increased, and thereby the sealing barrel can meet operating requirements under the working condition with the pressure of 90MPa to 105MPa, the temperature of 160 DEG C to 180 DEG C and corrosion.
Description
Technical field
The present invention relates to oil gas field packing equipment, the parts of particularly a kind of oil gas field in the packer.
Background technology
In the oil-gas field development field, packer is to implement the important components and parts that oil production by layer, seperated layer water injection, separate stratum fracfturing, acidifying or machinery block down-hole injection-production technologies such as blocking up, compression packer is use always in the packer a kind of, the rubber-like sealing drum is the core component of compression packer, and it will directly have influence on the work quality of packer.
Existing sealing drum generally is the packing element of being made by rubber (as shown in Figure 3), makes its distortion form sealing to oil gas well outer tube and inner core (axle or pipe) by two ends extruding, but pressure is when excessive, and the decrement that packing element is subjected to is bigger, very easily makes its damage.In the exploitation of oil gas field, the mining depth of oil gas well is more and more darker, increase along with the oil gas well depth, temperature, the pressure of exploitation working environment are big more, chemical corrosivity is also strong more, therefore, the requirements at the higher level of above-mentioned bad working environments just the packing element of packer have been proposed to adapt to, that is: the bearing capacity of seal member, heat-resisting ability and corrosion resistance etc.
For improving the bearing capacity of packing element, the packing element (as shown in Figure 4) that band metal shoulder is protected has appearred, but because the restriction of material self character, its bearing capacity, high temperature resistant and corrosion resistance is still limited, especially work as working environment pressure and reach 70～105Mpa, when temperature reaches 160 ℃ of left and right sides, both at home and abroad nearly all packing element all can not satisfy instructions for use (packing element of producing as more representational Baker Co., Ltd also can only satisfy in 84Mpa, 160 ℃ of following short time of operating mode and works, can not under 100Mpa, 160 ℃ operating mode operate as normal).Even the requirement among the standard HG/T 2701-95 of the Ministry of Chemical Industry " oil gas field is with compressing (Ys) formula packing element " also can not adapt to the requirement of current oil gas field deep mining far away.
Therefore, need to explore the compression packer sealing drum that a kind of oil gas field is used, make its pressure-bearing, high temperature resistant and corrosion resistance is stronger, to adapt to the requirement of current oil gas-field exploitation deep-well operating mode.
Summary of the invention
In view of this, the invention provides a kind of oil gas field compression packer sealing drum, by brand-new structure design and selection, significantly promote the pressure-bearing of packer sealing tube, high temperature resistant and decay resistance, to reach the purpose that adapts to current oil gas field deep-well operating mode instructions for use.
Oil gas field of the present invention compression packer sealing drum comprises being used to be enclosed within the packing element that uses on the packer inner core, and cover is provided with the pressure-bearing sleeve in the described packing element, and circle is along circumferentially being provided with cannelure in the pressure-bearing sleeve, and cannelure is embedded with sealing ring.
Further, described oil gas field also comprises with sliding matching mode with the compression packer sealing drum and is placed in pressure ring in the pressure-bearing sleeve, described pressure ring one end stretches out the pressure-bearing sleeve ends, the pressure ring other end and be arranged at the compression groove that forms variable-width between the circumferential step of pressure-bearing sleeve lining, compression groove is embedded with the pressure-resistant seal circle;
Further, described pressure-resistant seal circle is made of with the glue ring that is embedded in the polytetrafluoroethylene (PTFE) annular groove the radially outside polytetrafluoroethylene (PTFE) annular groove of opening;
Further, described packing element overcoat is provided with the outer sleeve of being made by polytetrafluoroethylene (PTFE);
Further, an end setting of described outer sleeve extends radially inwardly and coats the annular flanging of packing element end face;
Further, the thickness sum of the length that is shorter in length than packing element of described pressure-bearing sleeve and annular flanging forms the compression distance;
Further, it is semicircular annular protrusion that described annular flanging inboard is provided with cross section, and described packing element end is provided with the annular groove that cooperates with annular protrusion;
Further, the vertical sectional shape of described outer sleeve barrel is vertically side by side and opening inwardly the profile of the end to end formation of arc radially;
Further, described pressure-bearing sleeve is made of metal;
Further, described packing element and glue ring are made by acrylate, silica gel or hydrogenation nitrile rubber;
Further, described packing element, pressure-bearing sleeve and outer sleeve once vulcanize the bonding one of making by vulcanizing mold;
Further, described pressure-bearing sleeve outer wall is set side by side with circumferential slot vertically, and circle is provided with the projection that cooperates with circumferential slot in the described packing element;
Further, described polytetrafluoroethylene (PTFE) is filling-modified by glass fiber, molybdenum bisuphide, copper powder, graphite, polybenzoate or chrome green.
The beneficial effect of the invention: oil gas field of the present invention compression packer sealing drum, comprise and be used to be enclosed within the packing element that uses on the packer inner core, cover is provided with the pressure-bearing sleeve in the described packing element, circle is along cannelure circumferentially is set in the pressure-bearing sleeve, cannelure is embedded with sealing ring, during use, behind the packing element pressurized to dilatancy radially, be close to oil gas well outer tube after its external surface expands and form axial seal, simultaneously, also be provided with the axial seal of packer inner core on the pressure-bearing sleeve, satisfy the job requirement of packer.Behind the compression certain distance, the pressure-bearing sleeve plays supporting role, bears the pressure that continues increase, avoids the deflection of packing element to continue to increase and be damaged, and the bearing capacity of sealing drum is significantly promoted, and prolong application life.In addition, further improvement by additional ptfe (PTFE) outer sleeve, utilize that PTFE is high temperature resistant, strength ratio rubber is big, confficient of static friction is little and characteristic such as corrosion-resistant, improve the contact strength of sealing surface, can make sealing drum satisfy pressure is that 90～105Mpa, temperature are the instructions for use under 160～180 ℃ and the corrosivity operating mode.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the another kind of structural representation of outer sleeve;
Fig. 3 is a packing element schematic diagram of the prior art;
Fig. 4 is the packing element schematic diagram that the band shoulder is protected in the prior art.
The specific embodiment
Fig. 1 is a structural representation of the present invention, Fig. 2 is the another kind of structural representation of outer sleeve, Fig. 3 is a packing element schematic diagram of the prior art, Fig. 4 is the packing element schematic diagram that the band shoulder is protected in the prior art, as shown in the figure: the oil gas field of present embodiment compression packer sealing drum, comprise and be used to be enclosed within the packing element 1 that uses on the packer inner core, cover is provided with pressure-bearing sleeve 2 in the described packing element 1, circle is along cannelure 2a circumferentially is set in the pressure-bearing sleeve 2, cannelure 2a is embedded with sealing ring 3, sealing ring can play natural sealing function at the beginning, and cannelure can increase sealing effectiveness along the pressure-bearing quill to being set up in parallel to a plurality of.During use, to dilatancy radially, be close to oil gas well outer tube after its external surface expands and form axial seal behind the packing element pressurized, simultaneously, also be provided with the axial seal of packer inner core on the pressure-bearing sleeve, satisfy the job requirement of packer.Behind the compression certain distance, the pressure-bearing sleeve plays supporting role, bears the pressure that continues increase, avoids the deflection of packing element to continue to increase and be damaged, and the bearing capacity of sealing drum is significantly promoted, and prolong application life.After the release, by the elastic recoil of packing element, depressurization.
In the present embodiment, described oil gas field also comprises with sliding matching mode with the compression packer sealing drum and is placed in pressure ring 4 in the pressure-bearing sleeve 2, described pressure ring 4 one ends stretch out pressure-bearing sleeve 2 ends, pressure ring 4 other ends and be arranged at the compression groove 5 that forms variable-width between the circumferential step 2b of pressure-bearing sleeve 2 inwalls, compression groove 5 is embedded with the pressure-resistant seal circle, when sealing drum is in running order, pressure ring is concordant with the pressure-bearing sleeve ends under the effect of pressure, width when making the compression groove width less than original state, thereby the pressure bearing and seal circle is formed extruding, allow its radially inside dilatancy, the packer inner core is formed reliable sealing, satisfy the job requirement of deep-well packer.
In the present embodiment, described pressure-resistant seal circle is made of with the glue rings 7 that are embedded in the polytetrafluoroethylene (PTFE) annular groove 6 the radially outside polytetrafluoroethylene (PTFE) annular groove 6 of opening, utilize that the polytetrafluoroethylene (PTFE) material is high temperature resistant, strength ratio rubber is big, confficient of static friction is little and characteristic such as corrosion-resistant, improve the contact strength of sealing surface, can make sealing drum satisfy pressure is that 90～105Mpa, temperature are the instructions for use under 160～180 ℃ and the corrosivity operating mode, simultaneously, utilize the elasticity of glue ring, producing when it is squeezed expands realizes sealing, during release, also can the resilience depressurization.
In the present embodiment, described packing element 1 overcoat is provided with the outer sleeve of being made by polytetrafluoroethylene (PTFE) 8, utilize that the polytetrafluoroethylene (PTFE) material is high temperature resistant, strength ratio rubber is big, confficient of static friction is little and characteristic such as corrosion-resistant, improve the contact strength of sealing surface, can make sealing drum satisfy pressure is that 90～105Mpa, temperature are the instructions for use under 160～180 ℃ and the corrosivity operating mode.
In the present embodiment, an end setting of described outer sleeve 8 extends radially inwardly and coats the annular flanging 8a of packing element 1 end face, improves the contact strength of compression face, makes the bearing capacity of sealing drum better.
In the present embodiment, under the situation that has increased outer sleeve, the length that is shorter in length than packing element 1 of described pressure-bearing sleeve 2 and the thickness sum of annular flanging 8a form the compression distance, the definition of compression distance is in the standard HG/T 2701-95 of the Ministry of Chemical Industry " oil gas field is with compressing (Ys) formula packing element ": during the present envelope of packing element, and its axial compressed length.Make packing element be compressed length equal compression apart from the time can change by pressure-bearing arbor pressure-bearing, make packing element reach seat envelope just and require and do not continue compressive deformation, avoid damaging.Compression is apart from being to add that according to the length that the volume equal principle calculates 1/3 offset of this length draws.Certainly, compression be apart from also can reserving by the compression member on the packer, promptly is provided with one and is used for blind hole that the pressure-bearing sleeve is stepped down on compression member, and when the pressure-bearing sleeve withstood the blind hole bottom, the glue tube base envelope was finished.
In the present embodiment, it is semicircular annular protrusion 8b that described annular flanging 8a inboard is provided with cross section, described packing element 1 end is provided with the annular groove 1b that cooperates with annular protrusion 8b, when annular flanging pressurized makes the packing element distortion, guide its distortion expansion direction by annular protrusion, make annular flanging when lower compression, keep being close between packing element and the support set, prevent its disengagement.
In the present embodiment, the vertical sectional shape of described outer sleeve 8 barrels is vertically side by side and opening inwardly the profile of the end to end formation of arc radially, the polytetrafluoroethylene (PTFE) outer sleeve that working surface is contacted outer tube is processed into the geometry of modulus of elasticity the best, the screen resilience maximum, strengthen the axial compression ability and increase the maximum displacement of radially deformation, simultaneously, also strengthen the screen resilience of sealing drum, reach the processing quality requirement that needs sealing drum and outer tube disengaging to relax after the release.
In the present embodiment, described pressure-bearing sleeve is made of metal, the intensity height, and bearing capacity is strong, is easy to make and obtain.
In the present embodiment, described packing element 1 and glue ring 7 are made by acrylate, silica gel or hydrogenation nitrile rubber, and the three all has good high temperature resistant and corrosion resistance.
In the present embodiment, described packing element 1, pressure-bearing sleeve 2 and outer sleeve 8 once vulcanize the bonding one of making by vulcanizing mold, make between the three bonding reliably, and the production efficiency height is fit to produce in enormous quantities.
In the present embodiment, described pressure-bearing sleeve 2 outer walls are set side by side with circumferential slot 2c vertically, and circle being provided with the protruding 1a that cooperates with circumferential slot 2c in the described packing element 1, make bonding more firm between packing element and the pressure-bearing sleeve.
In the present embodiment, described polytetrafluoroethylene (PTFE) is filling-modified by glass fiber, molybdenum bisuphide, copper powder, graphite, polybenzoate or chrome green, the sleeve that polytetrafluoroethylene (PTFE) after the modification is made is convenient to be undertaken bonding with packing element and metal pressure-bearing arbor by sulfuration process, bonding more solid and reliable, simultaneously, also can further improve the compressive resistance of polytetrafluoroethylene (PTFE).
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (13)
1. oil gas field compression packer sealing drum, comprise and be used to be enclosed within the packing element (1) that uses on the packer inner core, it is characterized in that: cover is provided with pressure-bearing sleeve (2) in the described packing element (1), circle is along circumferentially being provided with cannelure (2a) in the pressure-bearing sleeve (2), and cannelure (2a) is embedded with sealing ring (3).
2. oil gas field compression packer sealing drum according to claim 1, it is characterized in that: also comprise with sliding matching mode being placed in the interior pressure ring (4) of pressure-bearing sleeve (2), described pressure ring (4) one ends stretch out pressure-bearing sleeve (2) end, pressure ring (4) other end and be arranged at the compression groove (5) that forms variable-width between the circumferential step (2b) of pressure-bearing sleeve (2) inwall, compression groove (5) is embedded with the pressure-resistant seal circle.
3. oil gas field compression packer sealing drum according to claim 2 is characterized in that: described pressure-resistant seal circle is made of radially outside polytetrafluoroethylene (PTFE) annular groove (6) of opening and the glue ring (7) that is embedded in the polytetrafluoroethylene (PTFE) annular groove (6).
4. according to the described oil gas field of the arbitrary claim of claim 1-3 compression packer sealing drum, it is characterized in that: described packing element (1) overcoat is provided with the outer sleeve of being made by polytetrafluoroethylene (PTFE) (8).
5. oil gas field compression packer sealing drum according to claim 4 is characterized in that: an end setting of described outer sleeve (8) extends radially inwardly and coats the annular flanging (8a) of packing element (1) end face.
6. oil gas field compression packer sealing drum according to claim 5 is characterized in that: the length that is shorter in length than packing element (1) of described pressure-bearing sleeve (2) and the thickness sum of annular flanging (8a) form the compression distance.
7. oil gas field compression packer sealing drum according to claim 6, it is characterized in that: it is semicircular annular protrusion (8b) that described annular flanging (8a) inboard is provided with cross section, and described packing element (1) end is provided with the annular groove (1b) that cooperates with annular protrusion (8b).
8. oil gas field compression packer sealing drum according to claim 7 is characterized in that: the vertical sectional shape of described outer sleeve (8) barrel is for vertically side by side and opening inwardly the profile of the end to end formation of arc radially.
9. oil gas field compression packer sealing drum according to claim 8 is characterized in that: described pressure-bearing sleeve is made of metal.
10. oil gas field compression packer sealing drum according to claim 9 is characterized in that: described packing element (1) and glue ring (7) are made by acrylate, silica gel or hydrogenation nitrile rubber.
11. oil gas field according to claim 10 compression packer sealing drum is characterized in that: described packing element (1), pressure-bearing sleeve (2) and outer sleeve (8) once vulcanize the bonding one of making by vulcanizing mold.
12. oil gas field according to claim 11 compression packer sealing drum, it is characterized in that: described pressure-bearing sleeve (2) outer wall is set side by side with circumferential slot (2c) vertically, and circle is provided with the projection (1a) that cooperates with circumferential slot (2c) in the described packing element (1).
13. oil gas field according to claim 12 compression packer sealing drum is characterized in that: described polytetrafluoroethylene (PTFE) is filling-modified by glass fiber, molybdenum bisuphide, copper powder, graphite, polybenzoate or chrome green.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206388319U CN201874513U (en) | 2010-12-02 | 2010-12-02 | Sealing barrel for compression type packers for oil-gas fields |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206388319U CN201874513U (en) | 2010-12-02 | 2010-12-02 | Sealing barrel for compression type packers for oil-gas fields |
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| Publication Number | Publication Date |
|---|---|
| CN201874513U true CN201874513U (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206388319U Expired - Fee Related CN201874513U (en) | 2010-12-02 | 2010-12-02 | Sealing barrel for compression type packers for oil-gas fields |
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| Country | Link |
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| CN (1) | CN201874513U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481449A (en) * | 2014-11-14 | 2015-04-01 | 中国石油天然气股份有限公司 | Compound packer rubber barrel and preparation method thereof |
| CN105201445A (en) * | 2014-06-26 | 2015-12-30 | 中国石油化工股份有限公司 | Rubber sleeve for packer and packer |
-
2010
- 2010-12-02 CN CN2010206388319U patent/CN201874513U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201445A (en) * | 2014-06-26 | 2015-12-30 | 中国石油化工股份有限公司 | Rubber sleeve for packer and packer |
| CN105201445B (en) * | 2014-06-26 | 2018-03-30 | 中国石油化工股份有限公司 | Packing element and packer for packer |
| CN104481449A (en) * | 2014-11-14 | 2015-04-01 | 中国石油天然气股份有限公司 | Compound packer rubber barrel and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GUIYANG GAOXIN LONGSHUO FLUORINE MATERIAL CO., LTD Free format text: FORMER OWNER: CHONGQING ZHIYAN TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20140521 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 401121 YUBEI, CHONGQING TO: 550008 GUIYANG, GUIZHOU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140521 Address after: 550008 room 557, building, Jinyang science and Technology Industrial Park, Guiyang hi tech Zone, Guizhou Patentee after: Guiyang Gaoxin Longshuo Fluorine Material Co., Ltd. Address before: 401121 No. 3 fortune road, North New District, Chongqing, 19-6 Patentee before: Chongqing Zhiyan Technology Development Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20181202 |
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| CF01 | Termination of patent right due to non-payment of annual fee |