CN201554861U - Elastic sealing plunger and low-leakage oil-well pump - Google Patents
Elastic sealing plunger and low-leakage oil-well pump Download PDFInfo
- Publication number
- CN201554861U CN201554861U CN 200920309187 CN200920309187U CN201554861U CN 201554861 U CN201554861 U CN 201554861U CN 200920309187 CN200920309187 CN 200920309187 CN 200920309187 U CN200920309187 U CN 200920309187U CN 201554861 U CN201554861 U CN 201554861U
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- Prior art keywords
- seal cartridge
- elastic seal
- section
- elastic
- clamping
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Abstract
The utility model relates to an elastic sealing plunger and a low-leakage oil-well pump. The oil-well pump comprises a pump cylinder and the elastic sealing plunger, the elastic sealing plunger comprises a central pipe and elastic sealing sleeves sleeved on the outer wall of the central pipe, the central pipe is provided with pressure transmitting holes corresponding to the elastic sealing sleeves, the elastic sealing sleeves are in sealing fit with the pump cylinder, the middle portion of each elastic sealing sleeve is a protruded seal section, two ends thereof are reduced clamping sections, the inner surface of the elastic sealing sleeve is in clinging fit with the central pipe, and the clamping sections are capped with protective seats fittingly. Liquid leakage of the oil-well pump is reduced as the pump cylinder and the central pipe are sealed well, inside stress of the sealing sleeves is uniformly acted on clamping protection flanges on the protective seats with protection functions on the sealing sleeves, thereby increasing wear resistance of the sealing sleeves, preventing the sealing sleeves from being damaged by concentrated stress to further affect service life and then guaranteeing service life of the sealing sleeves and the low-leakage oil-well pump.
Description
Technical field
The utility model relates to a kind of elastic packing plunger, also relates to a kind of low leakage oil well pump that uses the elastic packing plunger simultaneously.
Background technique
The disclosed pressure-compensated elastic packing of Chinese patent ZL95231760.5 plunger, comprise unidirectional ball seat seal assembly and last delivery connection, connect a core branch tube between unidirectional ball seat seal assembly and the last delivery connection, the outer surface of core branch tube is provided with guide sleeve, be provided with several groups of elastic seal cartridges between guide sleeve and the guide sleeve with inner frame, also be equiped with the fixedly spacer of compartmentation between the elastic seal cartridge, the core branch tube offers pressure conduction hole at the position of corresponding elastic seal cartridge, unidirectional ball seat seal assembly and core branch tube joint are provided with tightening nut, have formed a kind of sealing load thus and have been compensated, the pressure-compensated elastic packing plunger that Sealing directly contacts with the pump housing.Owing in its elastic seal cartridge inner frame is housed, make the wall thickness of elastic seal cartridge become thinner, each elastic seal cartridge only has the termination at its two ends to be held fixing by the very shallow locating groove of being offered on the corresponding spacer in addition, like this, when the oil well pump work of using this plunger to constitute, in each upstroke, after the oil-feed of elastic seal cartridge abdominal cavity is subjected to compression swelling, the stress of stuffing box gland inside is all concentrated the termination portion that it matches with spacer that acts on basically, cause this position to be damaged easily, thereby influence the working life of stuffing box gland.
Summary of the invention
The purpose of this utility model provides a kind of stuffing box gland long low leakage oil well pump in working life, concentrates impaired and influences the problem in stuffing box gland and pump working life to solve elastic seal cartridge stress in the existing pump.
Simultaneously, the utility model also provides the elastic packing plunger of this low leakage oil well pump.
For achieving the above object, the utility model adopts following technological scheme:
A kind of elastic packing plunger; comprise center tube and the elastic seal cartridge that is sleeved on the center tube outer wall; corresponding each elastic seal cartridge offers corresponding pressure transmission hole on the center tube; described elastic seal cartridge middle part is the low section of receiving of clamping for seal section, the two end part of projection; the inner tube surface of elastic seal cartridge and center tube close fit, the section of clamping go up the coating spiral-lock of coincideing the protection seat.
Be provided with between the surface of contact of each protection seat and the corresponding section of clamping of elastic seal cartridge and encircle the tooth fastening structure.
The described elastic seal cartridge section of clamping and surface of contact protection seat near seal section be arranged to the transition inclined-plane in abutting connection with the position, this transition inclined-plane extends to the seal section surface of elastic seal cartridge.
The protection seat prevulcanization at described elastic seal cartridge and its two ends is an integral body.
Be provided with the annular chamber of indent on the inner tubal wall of elastic seal cartridge at the position of the described pressure transmission hole of correspondence.
A kind of low leakage oil well pump; comprise pump barrel and elastic packing plunger; this plunger comprises center tube and the elastic seal cartridge that is sleeved on the center tube outer wall; corresponding each elastic seal cartridge offers corresponding pressure transmission hole on the center tube; elastic seal cartridge and described pump barrel are sealed and matched; described elastic seal cartridge middle part is the low section of receiving of clamping for seal section, the two end part of projection, and the inner tube surface of elastic seal cartridge and center tube close fit, the section of clamping go up the coating spiral-lock of coincideing the protection seat.
Be provided with between the surface of contact of each protection seat and the corresponding section of clamping of elastic seal cartridge and encircle the tooth fastening structure.
The described elastic seal cartridge section of clamping and surface of contact protection seat near seal section be arranged to the transition inclined-plane in abutting connection with the position, this transition inclined-plane extends to the seal section surface of elastic seal cartridge.
The protection seat prevulcanization at described elastic seal cartridge and its two ends is an integral body.
Be provided with the annular chamber of indent on the inner tubal wall of elastic seal cartridge at the position of the described pressure transmission hole of correspondence.
The low leakage oil well pump that the utility model provides, because its elastic seal cartridge and pump barrel are sealed and matched, the inner tube surface of elastic seal cartridge and center tube close fit make that the sealing between pump barrel and the center tube is comparatively tight, have reduced the leakage of liquid; Simultaneously; because the middle part of the elastic seal cartridge on the elastic packing plunger is the seal section of projection; two end part are the low section of receiving of clamping; the section of clamping goes up the coating spiral-lock of coincideing the protection seat; when the oil well pump work of using this plunger to constitute; in each upstroke; after the oil-feed of elastic seal cartridge abdominal cavity is subjected to compression swelling; the stress of stuffing box gland inside can uniformly act on to have on each protection seat and clamp protection along last to what stuffing box gland shielded; increased the wear resistance of stuffing box gland; avoid the stuffing box gland stress to concentrate impaired and influence the problem in working life, thereby guaranteed stuffing box gland and low working life of missing oil well pump.
Be provided with between the surface of contact of each protection seat of the present utility model and the corresponding section of clamping of elastic seal cartridge and encircle the tooth fastening structure, make that not only the sealing between protection seat and the stuffing box gland is more tight, reduced the leakage of liquid, made that also the dismounting between protection seat and the stuffing box gland is comparatively convenient; The elastic seal cartridge section of clamping and surface of contact protection seat near seal section be arranged to the transition inclined-plane in abutting connection with the position, this transition inclined-plane extends to the seal section surface of elastic seal cartridge, makes the protection seat play the better protection effect to the section of clamping on the stuffing box gland; The protection seat prevulcanization at elastic seal cartridge and its two ends is an integral body, makes between elastic seal cartridge and the protection seat to the zero clearance seals, reduced liquid wastage, improved pump efficiency; Be provided with the annular chamber of indent on the inner tubal wall of elastic seal cartridge at the position of corresponding pressure transmission hole, strengthened the compression area of elastic seal cartridge ingress, thereby make that the pressurized of elastic seal cartridge is more even.
Description of drawings
Fig. 1 is equipped with the low leakage oil well pump structural representation of elastic packing plunger for the utility model;
Fig. 2 is the partial view (removing pump barrel 13) at A place among Fig. 1.
Embodiment
As shown in Figure 1 and Figure 2, the elastic packing plunger that the utility model provides comprises center tube 1 and the elastic seal cartridge 3 that is sleeved on center tube 1 outer wall, the inner tube surface of elastic seal cartridge 3 and center tube 1 close fit; Corresponding each elastic seal cartridge 3 offers corresponding pressure transmission hole 5 on the center tube 1; be provided with the annular chamber 4 of indent on the inner tubal wall of elastic seal cartridge 3 at the position of corresponding pressure transmission hole 5; the middle part of elastic seal cartridge 3 is the seal section 12 of projection; two end part are the low section of receiving of clamping 7; the coating spiral-lock of coincideing on the section of clamping 7 has protection seat 2; the surface of contact of the section of clamping 7 and protection seat 2 is being arranged to transition inclined-plane 6 near seal section 12 in abutting connection with the position; this transition inclined-plane 6 extends to the surface of the seal section 12 of elastic seal cartridge 3; simultaneously, also be provided with between the surface of contact of each protection seat 2 and the corresponding section of clamping 7 of elastic seal cartridge 3 and encircle the tooth fastening structure.In addition; for better seal; can be an integral body also with protection seat 2 prevulcanizations at elastic seal cartridge 3 and its two ends; be elastic seal cartridge 3 with after protection seat 2 cooperates; adopt vulcanizing treatment technology; elastic seal cartridge 3 and protection seat 2 are connected to one, and making its surface of contact is the zero clearance sealing, to avoid the leakage of liquid.
As shown in Figure 1 and Figure 2, the low leakage oil well pump that above-mentioned elastic packing plunger is housed that the utility model provides, comprise pump barrel 13 and elastic packing plunger, the elastic seal cartridge 3 on pump barrel 13 and the elastic packing plunger is sealed and matched, thereby makes the state that keeps sealing between pump barrel 13 and the center tube 1.
During upstroke, it is up that sucker rod drives the elastic packing plunger, and the standing valve ball 10 on this oil well pump breaks away from standing valve seat 11, and liquid flows into pump barrel 13 by the stratum; Simultaneously, be in sealing state between travelling valve ball 8 and the travelling valve seat 9, elastic packing plunger pressure inside raises, and the pressure transmission hole 5 of liquid on center tube 1 makes elastic seal cartridge 3 expansions, the elastic packing plunger closely contacts with pump barrel 13, and liquid that can not is missed.
During down stroke, the elastic packing plunger is descending, passage between standing valve ball 10 sealing stratum and the pump barrel 13, travelling valve ball 8 breaks away from travelling valve seat 9, the plunger internal and external pressure balance, liquid flows in the elastic packing plunger, and elastic seal cartridge 3 shrinks a little, but still can keep sealing state between elastic packing plunger and the pump barrel 13.This oil well pump is in the pumping process, and the fluid pressure effect in the elastic seal cartridge 3 acceptor center pipes 1 is always the zero clearance sealing between elastic packing plunger and the metal pump barrel 13, make that the hydraulic slip amount is lower, pump efficiency is higher, and working life is longer.
Claims (10)
1. elastic packing plunger; comprise center tube and the elastic seal cartridge that is sleeved on the center tube outer wall; corresponding each elastic seal cartridge offers corresponding pressure transmission hole on the center tube; it is characterized in that: described elastic seal cartridge middle part is the low section of receiving of clamping for seal section, the two end part of projection; the inner tube surface of elastic seal cartridge and center tube close fit, the section of clamping go up the coating spiral-lock of coincideing the protection seat.
2. elastic packing plunger according to claim 1 is characterized in that: be provided with between the surface of contact of each protection seat and the corresponding section of clamping of elastic seal cartridge and encircle the tooth fastening structure.
3. elastic packing plunger according to claim 2; it is characterized in that: the described elastic seal cartridge section of clamping and surface of contact protection seat near seal section be arranged to the transition inclined-plane in abutting connection with the position, this transition inclined-plane extends to the seal section surface of elastic seal cartridge.
4. according to claim 1 or 2 or 3 described elastic packing plungers, it is characterized in that: the protection seat prevulcanization at described elastic seal cartridge and its two ends is an integral body.
5. elastic packing plunger according to claim 4 is characterized in that: the annular chamber that is provided with indent on the inner tubal wall of elastic seal cartridge at the position of the described pressure transmission hole of correspondence.
6. miss oil well pump for one kind low; comprise pump barrel and elastic packing plunger; this plunger comprises center tube and the elastic seal cartridge that is sleeved on the center tube outer wall; corresponding each elastic seal cartridge offers corresponding pressure transmission hole on the center tube; elastic seal cartridge and described pump barrel are sealed and matched; it is characterized in that: described elastic seal cartridge middle part is the low section of receiving of clamping for seal section, the two end part of projection, and the inner tube surface of elastic seal cartridge and center tube close fit, the section of clamping go up the coating spiral-lock of coincideing the protection seat.
7. low leakage oil well pump according to claim 6 is characterized in that: be provided with between the surface of contact of each protection seat and the corresponding section of clamping of elastic seal cartridge and encircle the tooth fastening structure.
8. low leakage oil well pump according to claim 7; it is characterized in that: the described elastic seal cartridge section of clamping and surface of contact protection seat near seal section be arranged to the transition inclined-plane in abutting connection with the position, this transition inclined-plane extends to the seal section surface of elastic seal cartridge.
9. according to claim 6 or 7 or 8 described low leakage oil well pumps, it is characterized in that: the protection seat prevulcanization at described elastic seal cartridge and its two ends is an integral body.
10. low leakage oil well pump according to claim 9 is characterized in that: the annular chamber that is provided with indent on the inner tubal wall of elastic seal cartridge at the position of the described pressure transmission hole of correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920309187 CN201554861U (en) | 2009-08-28 | 2009-08-28 | Elastic sealing plunger and low-leakage oil-well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920309187 CN201554861U (en) | 2009-08-28 | 2009-08-28 | Elastic sealing plunger and low-leakage oil-well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201554861U true CN201554861U (en) | 2010-08-18 |
Family
ID=42614543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920309187 Expired - Lifetime CN201554861U (en) | 2009-08-28 | 2009-08-28 | Elastic sealing plunger and low-leakage oil-well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201554861U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527457A (en) * | 2013-08-14 | 2014-01-22 | 大庆大华宏业石油工程技术有限公司 | Double-layer self-sealing ultra-long stroke oil well pump |
-
2009
- 2009-08-28 CN CN 200920309187 patent/CN201554861U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527457A (en) * | 2013-08-14 | 2014-01-22 | 大庆大华宏业石油工程技术有限公司 | Double-layer self-sealing ultra-long stroke oil well pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100818 |
|
| CX01 | Expiry of patent term |