CN108708683B - Oil well environmental protection eccentric wear prevention well head device - Google Patents
Oil well environmental protection eccentric wear prevention well head device Download PDFInfo
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- CN108708683B CN108708683B CN201810306056.8A CN201810306056A CN108708683B CN 108708683 B CN108708683 B CN 108708683B CN 201810306056 A CN201810306056 A CN 201810306056A CN 108708683 B CN108708683 B CN 108708683B
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- Prior art keywords
- wellhead
- base
- conical
- well head
- upper base
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- 239000003129 oil well Substances 0.000 title claims abstract description 19
- 230000002265 prevention Effects 0.000 title claims abstract description 16
- 230000007613 environmental effect Effects 0.000 title description 2
- 238000012856 packing Methods 0.000 claims abstract description 74
- 238000003825 pressing Methods 0.000 claims abstract description 21
- 239000010687 lubricating oil Substances 0.000 claims description 38
- 239000003921 oil Substances 0.000 claims description 9
- 210000004907 gland Anatomy 0.000 claims description 3
- 239000010779 crude oil Substances 0.000 abstract description 9
- 238000011084 recovery Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an environment-friendly eccentric wear prevention well head device for an oil well, which comprises a well head upper base, a well head lower base and a polished rod penetrating through the well head upper base and the well head lower base, wherein bosses are arranged on the lower portions of the well head upper base and the well head lower base around the inner walls, spiral cushions and conical coil sleeves are sequentially arranged on the bosses from bottom to top, the conical coil sleeves are sleeved on the polished rod, a conical sleeve cover plate is sleeved on the upper ends of the conical coil sleeves, pressing plates arranged along the inner walls of the well head upper base and the well head lower base are arranged on the upper surfaces of the conical sleeve cover plate respectively, a pressing cover is further connected to the inner wall of the upper end of the well head upper base, a pressing cover is further connected to the inner wall of the well head lower base, inflation coils are further arranged in the well head upper base and the well head lower base, upper inflation ports and lower inflation ports connected to the corresponding inflation coils are further arranged. The problem of among the prior art packing root life short and the crude oil recovery degree of difficulty that leaks are big is solved.
Description
Technical Field
The invention belongs to the technical field of oil well wellhead sealing, and particularly relates to an environment-friendly eccentric wear prevention wellhead device for an oil well.
Background
The oil well mouth packing is the sealing member of polished rod and well head, makes the oil of following the stratum production get into appointed pipeline, and polished rod and packing relative reciprocating motion number of times every day can reach about nine thousand times the most, and frequent friction makes the great reduction in life-span of packing, then ten days less, then more just need change in one or two months, changes the packing and clears up the crude oil that spills and has increased workman's intensity of labour, and the crude oil recovery degree of difficulty that spills is big, causes very big pollution to the environment.
Disclosure of Invention
The invention aims to provide an oil well environment-friendly eccentric wear prevention wellhead device, which solves the problems that packing in the prior art is short in service life and leaked crude oil is difficult to recover.
The technical scheme includes that the environment-friendly eccentric wear prevention well head device for the oil well comprises a shell-shaped well head upper base, a shell-shaped well head lower base and a polished rod, wherein the shell-shaped well head upper base and the shell-shaped well head lower base are coaxially arranged, the polished rod penetrates through the well head upper base and the well head lower base and is coaxially arranged with the well head upper base and the well head lower base, bosses are arranged on the lower portions of the well head upper base and the well head lower base around the inner side walls, spiral cushions and conical disc root sleeves are sequentially arranged on the upper surfaces of the bosses from bottom to top, the conical disc root sleeves are sleeved on the polished rod, conical sleeve cover plates are sleeved on the upper ends of the conical sleeve root sleeves, pressing plates arranged along the inner walls of the well head upper base and the well head lower base respectively are arranged on the upper surfaces of the inner walls of the well head upper base and the well head lower base, pressing plates are connected with pressing covers through threads, inflating coils are further arranged between the inner walls of the well head upper base and the The inflation inlet, there is the connecting pipe lower extreme of well head upper base inner wall through threaded connection, and threaded connection is passed through in the upper end of well head lower base inner wall to the other end of connecting pipe, and the both ends of connecting pipe are supported respectively under the boss that lies in well head upper base and on the clamp plate that lies in well head lower base.
The present invention is also characterized in that,
the lower end of the wellhead lower base is connected with a wellhead oil pipe through threads.
And a lubricating oil cavity is formed among the connecting pipe, the polished rod, the conical packing sleeve, the conical sleeve cover plate and the pressing plate which are positioned in the lower base of the wellhead, and the boss, the spiral pad and the conical packing sleeve which are positioned in the upper base of the wellhead.
And a drainage port communicated with the lubricating oil cavity is also formed in the side wall of the connecting pipe.
The side walls of the wellhead upper base and the wellhead lower base form a cavity with a boss, a spiral pad, a conical coil sleeve, a conical sleeve cover plate and a pressing plate which are correspondingly arranged in the side walls, and the inflation coil is arranged in the cavity.
The spiral pad is placed on the boss upper surface, and the upper surface of spiral pad sets up to the spiral step form, and the lower surface of toper packing sleeve sets up to the spiral step that matches with the upper surface of spiral pad, and the upper surface of spiral pad is connected through the cooperation of spiral step face with the lower surface of toper packing sleeve each other.
The outer diameter of the conical packing sleeve is sequentially increased from top to bottom.
The conical packing sleeve is a rubber conical packing sleeve.
The upper inflation inlet and the lower inflation inlet are respectively positioned at the lower positions of the upper middle parts of the side walls of the wellhead upper base and the wellhead lower base.
The invention has the beneficial effects that:
1. the coil pipes are inflated through inflation ports of the upper and lower inflation coil pipes, high-pressure gas sealed in the inflation coil pipes tightly presses the conical packing sleeves on the polished rods under the limitation of the inner walls of the upper and lower bases, the conical packing sleeve cover plates and the pressing plates, when the polished rods go down, the polished rods pass through lubricating oil in the lubricating oil cavities, the lubricating oil is attached to the polished rods, when the polished rods with the attached oil pass through the lower conical packing sleeves, redundant lubricating oil is left in the lubricating oil cavities, and the rest lubricating oil forms an oil film on the polished rods to lubricate the polished rods and the conical packing sleeves; when the polish rod goes upward, the polish rod passes through the lubricating oil in the lubricating oil cavity, the lubricating oil is attached to the polish rod, when the polish rod attached with the lubricating oil passes through the upper conical packing sleeve, redundant lubricating oil is left in the lubricating oil cavity, and the rest lubricating oil forms an oil film on the polish rod to lubricate the polish rod and the conical packing sleeve, so that the lubricating effect of the sleeve and the polish rod is improved, and the service life of the conical packing is prolonged;
2. when the conical packing sleeve is worn, gas in the inflatable coil pipe expands, the conical packing sleeve rotates under the radial pressure of the inflatable coil pipe, the length of the conical packing sleeve is increased in the rotating process, the increased length is screwed out of the conical hole of the conical cover plate, the inner hole of the conical packing sleeve is reduced, and the polished rod is compressed again, so that the wear thickness of the conical packing sleeve is improved, and the service life of the conical packing sleeve is prolonged;
3. when the conical packing sleeve is worn to a limit degree, the volume of the inflation tube is increased, the internal pressure of the inflation tube is reduced, the pressure acting on the conical packing sleeve is reduced, when the radial pressure of the inflation coil is not enough to tightly press the conical packing sleeve on the polish rod, crude oil in the well leaks out from a gap between the conical packing sleeve and the polish rod and enters the lubricating oil cavity, when the liquid level in the lubricating oil cavity exceeds the drainage port, the crude oil flows into a designated container along the drainage port through a pipeline and then is recovered, and the crude oil is difficult to recover and is environment-friendly;
4. the outer part of the conical packing sleeve is provided with the inflatable coil pipe, the conical packing sleeve is a certain distance away from the inner wall of the wellhead base, when the axes of the polish rod and the wellhead base are not coaxial, namely the axis of the polish rod is deviated, the inflatable coil pipe is pressed by one surface, and high-pressure gas flows to the other surface to tightly press the conical packing sleeve, so that the conical packing sleeve is sleeved in the wellhead base to realize a certain amount of displacement in any direction of 360 degrees, and the packing is prevented from being abraded due to eccentric wear.
Drawings
FIG. 1 is a schematic structural diagram of an environment-friendly eccentric wear prevention wellhead device for an oil well according to the invention;
FIG. 2 is a schematic structural diagram of a spiral pad in an environment-friendly eccentric wear prevention wellhead device for an oil well according to the invention;
FIG. 3 is a schematic structural diagram of the bottom of a conical packing sleeve in the environment-friendly anti-eccentric wellhead device for the oil well.
In the drawing, 1, a polish rod, 2, a wellhead lower base, 3, a spiral cushion, 4, a conical coil sleeve, 5, an inflation coil, 6, a conical sleeve cover plate, 7, a pressing plate, 8, a connecting pipe, 9, a wellhead upper base, 10, a gland, 11, a boss, 12, a drainage port, 13, an inflation port, 14, a lubricating oil cavity and 15, a lower inflation port are arranged.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to an oil well environment-friendly eccentric wear prevention wellhead device, which is structurally shown in figure 1 and comprises a casing-shaped wellhead upper base 9, a wellhead lower base 2 and a polished rod 1, wherein the casing-shaped wellhead upper base 9 and the wellhead lower base 2 are coaxially arranged up and down, the polished rod 1 penetrates through the wellhead upper base 9 and the wellhead lower base 2 and is coaxially arranged with the wellhead upper base and the wellhead lower base, the lower parts of the wellhead upper base 9 and the wellhead lower base 2 are provided with bosses 11 around the inner side wall, the upper surface of each boss 11 is sequentially provided with a spiral pad 3 and a conical coil bushing 4 from bottom to top, the conical coil bushing 4 is sleeved on the polished rod 1, the upper end of the conical coil bushing 4 is sleeved with a conical bushing cover plate 6, the conical bushing cover plate 6 is provided with pressing plates 7 respectively arranged along the inner walls of the wellhead upper base 9 and the wellhead lower base 2, the upper end of the inner wall of the wellhead upper base 9 is further connected with a pressing cover 10 through threads, the pressing plate 10 abuts against the pressing 5, still be provided with respectively on 2 lateral walls of base under well head and the well head of well head upper base 9 and well head and aerify mouthful 15 with correspond last inflation inlet 13 that aerify coil pipe 5 and be connected, there is connecting pipe 8 lower extreme of 9 inner walls of well head upper base through threaded connection, the other end of connecting pipe 8 passes through the upper end of threaded connection base 2 inner walls under the well head, the both ends of connecting pipe 8 support respectively under the boss that lies in well head upper base 9 and on the clamp plate 7 that lies in well head base 2 down.
The lower end of the wellhead lower base 2 is connected with a wellhead oil pipe through threads.
And a lubricating oil cavity 14 is formed among the connecting pipe 8, the polished rod 1, the conical disk root sleeve 4 positioned in the wellhead lower base 2, the conical sleeve cover plate 6, the pressing plate 7, the boss 11 positioned in the wellhead upper base 9, the spiral pad 3 and the conical disk root sleeve 4.
And a drainage port 12 communicated with a lubricating oil cavity 14 is also formed in the side wall of the connecting pipe 8.
The side walls of the wellhead upper base 9 and the wellhead lower base 2 respectively form a cavity with a boss 11, a spiral pad 3, a conical packing sleeve 4, a conical sleeve cover plate 6 and a pressing plate 7 which are correspondingly arranged in the side walls, and the inflation coil pipe 5 is arranged in the cavity.
As shown in fig. 2, the spiral gasket 3 is placed on the upper surface of the boss 11, the upper surface of the spiral gasket 3 is arranged in a spiral step shape, as shown in fig. 3, the lower surface of the conical packing sleeve 4 is arranged in a spiral step shape matched with the upper surface of the spiral gasket 3, and the upper surface of the spiral gasket 3 and the lower surface of the conical packing sleeve 4 are mutually matched and connected through a spiral step surface.
The outer diameter of the conical packing sleeve 4 is sequentially increased from top to bottom.
The conical packing sleeve 4 is a rubber conical packing sleeve.
The upper inflation inlet 13 and the lower inflation inlet 15 are respectively positioned at the upper middle part of the side wall of the wellhead upper base 9 and the wellhead lower base 2.
The working principle of the environment-friendly eccentric wear prevention wellhead device for the oil well is as follows:
(1) principle of long-term operation
The upper inflation inlet 13 and the lower inflation inlet 15 respectively inflate the inflation coil 5 positioned in the wellhead upper base 9 and the wellhead lower base 2, high-pressure gas sealed in the inflation coil 5 tightly presses the conical packing sleeve 4 on the polish rod 1 under the limitation of the inner walls of the wellhead upper base 9 and the wellhead lower base 2, the conical sleeve cover plate 6 and the pressing plate 7, when the polish rod 1 descends, the polish rod 1 passes through lubricating oil in the lubricating oil cavity 14, the lubricating oil is attached to the polish rod 1, when the polish rod 1 with the lubricating oil passes through the lower conical packing sleeve 4, redundant lubricating oil is left in the lubricating oil cavity 14, and the rest lubricating oil forms an oil film on the polish rod 1 to lubricate the polish rod 1 and the conical packing sleeve 4; when the polish rod 1 moves upwards, the polish rod 1 passes through the lubricating oil in the lubricating oil cavity 14, the lubricating oil is attached to the polish rod 1, when the polish rod 1 attached with the lubricating oil passes through the upper conical packing sleeve 4, redundant lubricating oil is left in the lubricating oil cavity 14, and the rest lubricating oil forms an oil film on the polish rod 1 to lubricate the polish rod 1 and the conical packing sleeve 4, so that the lubricating effect of the conical packing sleeve 4 and the polish rod 1 is improved, and the service life of the conical packing sleeve 4 is prolonged;
after 4 wearing and tearing of toper packing sleeve, aerify 5 interior gas expansions of coil pipe, toper packing sleeve 4 self is rotatory under aerifing coil pipe radial pressure, and at rotatory in-process, 4 length increases of toper packing sleeve, and 6 taper holes back-spin of toper apron are followed to increase length, and 4 holes of toper packing sleeve diminish, compress tightly polished rod 1 again, improve the wearing and tearing thickness of toper packing sleeve 4 to improve the life of toper packing 4.
(2) Principle of leakproof operation
When the conical packing sleeve 4 is worn to a limit degree, the volume of the inflatable coil pipe 5 is increased, the internal pressure of the inflatable coil pipe is reduced, the pressure acting on the conical packing sleeve 4 is reduced, when the radial pressure of the inflatable coil pipe 5 is not enough to press the conical packing sleeve 4 on the polished rod 1, crude oil in a well leaks out from a gap between the conical packing sleeve 4 and the polished rod 1 and enters the lubricating oil cavity 14, and when the liquid level in the lubricating oil cavity 14 exceeds the drainage port 12, the crude oil passes through a pipeline along the drainage port 12 and flows into a specified container, and then is recovered.
(3) Principle of preventing eccentric wear
The outer part of the conical packing sleeve 4 is provided with the inflatable coil pipe 5, the conical packing sleeve 4 is at a certain distance from the inner walls of the wellhead upper base 9 and the wellhead lower base 2, when the polish rod 1 is not coaxial with the wellhead upper base 9 and the wellhead lower base 2, the polish rod 1 can drive the conical packing sleeve 4 to extrude the inflatable coil pipe, and due to the fact that gas has strong liquidity, after being pressed on one side, the polish rod flows to the other side, and meanwhile the conical packing sleeve 4 is tightly pressed on the polish rod 1, and therefore a certain amount of displacement of the conical packing sleeve 4 in any direction of 360 degrees in the wellhead upper base 9 and the wellhead lower base 2 is achieved.
Claims (6)
1. The environment-friendly eccentric wear prevention wellhead device for the oil well is characterized by comprising a shell-shaped wellhead upper base (9) and a wellhead lower base (2) which are coaxially arranged from top to bottom, and a polished rod (1) which penetrates through the wellhead upper base (9) and the wellhead lower base (2) and is coaxially arranged with the wellhead upper base and the wellhead lower base, wherein bosses (11) are arranged on the lower portions of the wellhead upper base (9) and the wellhead lower base (2) around the inner side wall, spiral cushions (3) and conical packing sleeves (4) are sequentially arranged on the upper surface of the bosses (11) from bottom to top, the conical packing sleeves (4) are sleeved on the polished rod (1), a conical sleeve cover plate (6) is sleeved on the upper ends of the conical sleeve cover plate (6), pressing plates (7) are respectively arranged along the inner walls of the wellhead upper base (9) and the wellhead lower base (2), a gland (10) is further connected to the upper end of the inner wall of the wellhead upper base (9) through, the gland (10) abuts against a pressing plate (7) located in the wellhead upper base (9), the inner walls of the wellhead upper base (9) and the wellhead lower base (2) are located between the conical packing sleeves (4) and are also provided with an inflating coil (5), the side walls of the wellhead upper base (9) and the wellhead lower base (2) are also respectively provided with an upper inflating port (13) and a lower inflating port (15) which are connected with the corresponding inflating coil (5), the lower end of the inner wall of the wellhead upper base (9) is connected with a connecting pipe (8) through threads, the other end of the connecting pipe (8) is connected to the upper end of the inner wall of the wellhead lower base (2) through threads, and two ends of the connecting pipe (8) abut against the lower end of a boss (11) located in the wellhead upper base (9) and the pressing plate (7) located in the wellhead lower base (2) respectively;
the spiral gasket (3) is placed on the upper surface of the boss (11), the upper surface of the spiral gasket (3) is in a spiral step shape, the lower surface of the conical packing sleeve (4) is in a spiral step shape matched with the upper surface of the spiral gasket (3), and the upper surface of the spiral gasket (3) is matched and connected with the lower surface of the conical packing sleeve (4) through a spiral step surface;
the outer diameter of the conical packing sleeve (4) is sequentially increased from top to bottom; the conical packing sleeve (4) is a rubber conical packing sleeve.
2. An environment-friendly eccentric wear prevention wellhead device for oil wells according to claim 1, characterized in that the lower end of the wellhead lower base (2) is connected with a wellhead oil pipe through threads.
3. An environment-friendly eccentric wear prevention wellhead device for oil wells according to claim 1, characterized in that lubricating oil cavities (14) are formed among the connecting pipe (8), the polish rod (1), the conical packing sleeve (4) in the lower base (2) of the wellhead, the conical sleeve cover plate (6) and the pressure plate (7), and the boss (11), the spiral gasket (3) and the conical packing sleeve (4) in the upper base (9) of the wellhead.
4. The environment-friendly eccentric wear prevention wellhead device for the oil well as defined in claim 2 is characterized in that the side wall of the connecting pipe (8) is further provided with a drainage port (12) communicated with the lubricating oil cavity (14).
5. The environment-friendly eccentric wear prevention wellhead device for the oil well as defined in claim 1, characterized in that a cavity is formed between the side walls of the wellhead upper base (9) and the wellhead lower base (2) and the boss (11), the spiral pad (3), the conical coil bushing (4), the conical bushing cover plate (6) and the pressing plate (7) which are correspondingly arranged in the side walls, and the air-filled coil pipe (5) is arranged in the cavity.
6. An environment-friendly eccentric wear prevention wellhead device for oil wells according to claim 1, characterized in that the upper inflation inlet (13) and the lower inflation inlet (15) are respectively positioned at the position of lower middle part on the side wall of the wellhead upper base (9) and the wellhead lower base (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810306056.8A CN108708683B (en) | 2018-04-08 | 2018-04-08 | Oil well environmental protection eccentric wear prevention well head device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810306056.8A CN108708683B (en) | 2018-04-08 | 2018-04-08 | Oil well environmental protection eccentric wear prevention well head device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108708683A CN108708683A (en) | 2018-10-26 |
| CN108708683B true CN108708683B (en) | 2021-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810306056.8A Active CN108708683B (en) | 2018-04-08 | 2018-04-08 | Oil well environmental protection eccentric wear prevention well head device |
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| Country | Link |
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| CN (1) | CN108708683B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113630A (en) * | 2018-08-15 | 2019-01-01 | 延安大学 | A kind of taper oil well environment protective eccentric abrasion prevention wellhead assembly |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4981174A (en) * | 1990-02-14 | 1991-01-01 | White Orvel O | Leakproof stuffing box with external lubrication for polish rod |
| CN2895712Y (en) * | 2006-06-13 | 2007-05-02 | 崔雁斌 | Oil-well packing box capable of constant lubricating |
| CN202000946U (en) * | 2011-03-16 | 2011-10-05 | 中国石油天然气股份有限公司 | Novel well head double seal box |
| CN202417379U (en) * | 2011-09-25 | 2012-09-05 | 李昱 | Novel polished rod sealing device for wellhead of oil pumping well |
| CN202882832U (en) * | 2012-11-20 | 2013-04-17 | 刘景录 | Lubrication type double-sealing packing box |
| CN204476340U (en) * | 2015-02-12 | 2015-07-15 | 朱志学 | A kind of double-packing incline lubricating type packing box |
| CN106968631B (en) * | 2017-04-24 | 2019-03-15 | 延长油田股份有限公司志丹采油厂 | A kind of long-acting anti-oil leakage device of well mouth of oil well |
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2018
- 2018-04-08 CN CN201810306056.8A patent/CN108708683B/en active Active
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| CN108708683A (en) | 2018-10-26 |
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Effective date of registration: 20220816 Address after: Room 1701 and 1702, Building 3#, Emerging Industry Incubator, No. 44, Torch New Street, High-tech Zone, Daqing City, Heilongjiang Province, 163000 Patentee after: Daqing qiansichen Petroleum Technology Development Co.,Ltd. Address before: 11-4-701, Huanghaowan Gardener Community, Baota District, Yan'an City, Shaanxi Province 717600 Patentee before: Zhao Jichun |