CN2553104Y

CN2553104Y - Radial follow type polish rod sealer

Info

Publication number: CN2553104Y
Application number: CN 02273634
Authority: CN
Inventors: 李天德; 牛井岗; 李金玲; 赵明川
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2002-06-05
Filing date: 2002-06-05
Publication date: 2003-05-28
Anticipated expiration: 2012-06-05

Abstract

The utility model relates to a wellhead device of oilfield pumping unit, in particular to a sealer used on the polished sucker rod, aiming to solve the problem that the pumping unit wellhead polished rod sealer used at present is the aligning polished rod sealer, and the fillers of the sealing device are easily carried out by the polished rod, thus the sealing effect is affected. The utility model discloses a radial follow-up polished rod sealer, comprising a sealer (1), which is characterized in that a scraping member is arranged in the sealer (1); the scraping mechanism comprises a support (2), a cleaner (3) and a base (4); the support (2) is fixedly connected at the inner part of the sealer (1); a groove (5) is arranged on the support (2); the base (4) is arranged at the lower part of the groove (5) and connected with the support (2); the edge of the cleaner (3) is extended into the groove (5) and supported by the base (4). The utility model has the advantages of simple structure and good sealing effect as the substitute of polished rod sealer in the prior art.

Description

Following type polished rod sealer radially

Technical field: the utility model relates to a kind of oil-field oil pumper wellhead equipment, particularly a kind of sealer that is used on the oil pumping polish rod.

Background technology: the oil pumper wellhead polish rod sealer that uses is the self-aligning polished rod sealer at present, in use there is deficiency clearly, the one, because the factor of installation deviation or foundation deformation, polished rod and well head center are misaligned or beat takes place when moving up and down polished rod, cause the gap of polished rod and sealer centre bore to become big, the filler of sealing device is very easily taken out of by polished rod, influences sealing effectiveness.The 2nd, owing to contain chemical agent in the liquid of extraction, all there is corrosiveness in chemical agent to filler and polished rod, so the time once making the polished rod variation in diameter easily for a long time, causes the gap of polished rod and sealer centre bore to become big, cause the filler of sealing device very easily to be taken out of, influence sealing effectiveness by polished rod.The 3rd, extraction liquid can make polished rod surface flatness variation at the polished rod surface scale, and polished rod can aggravate the wearing and tearing and the loss of filler in the sealing device when moving up and down, make the sealing performance variation of device.ZL94219111 discloses a kind of oil pumping polish rod sealer, it by last seal assembly, joint, lower seal assembly, clip is first-class forms, lower seal assembly lower end is connected to a blowout prevention box, blowout prevention box and clip head are connected and fixed by retainer plate, and upwards there is certain amount of movement in the footpath of blowout prevention box in retainer plate.Though this patent has solved the problem that filler is easily taken out of by polished rod, plays good sealing function, owing to its complex structure, performance difficulty, and cost is very high, so be not easy to apply very much.

Summary of the invention: the purpose of this utility model is to provide a kind of simple in structure and can well reach the radially following type polished rod sealer of sealing effectiveness, its objective is such realization: following type polished rod sealer radially, its composition comprises sealer 1, sealing is housed in described sealer 1 scrapes dirty mechanism, described sealing is scraped dirty mechanism and is comprised support 2, descaler 3 and base 4, support 2 is fixed in the inside of sealer 1, support 2 is provided with groove 5, base 4 is arranged on the bottom of groove 5 and is connected with support 2, and the edge of descaler 3 extend in the groove 5 and is brace table with base 4.Groove 5 on the support 2 is a truncated cone-shaped, and descaler 3 is ring platform shape, the equal diameters in the interior circular diameter of descaler 3 and polished rod 6 cross sections, and the outside diameter of descaler 3 is less than the diameter of groove 5.Advantage of the present utility model is: the edge of descaler (3) extend in the groove 5 and is brace table with base 4, the equal diameters in the interior circular diameter of descaler 3 and polished rod 6 cross sections, so descaler 3 closely is connected with polished rod 6, the outside diameter of descaler 3 is less than the diameter of groove 5, so when polished rod 6 is moving up and down when beat takes place, and polished rod 6 close-connected descalers 3 are followed polished rod 6 and are moved radially Shi Buhui and cause producing the space between descaler 3 and the polished rod 6, have reached good sealing effectiveness.Cooperate with polished rod 6 closely owing to descaler 3 in addition, when polished rod 6 moves up and down, descaler 3 can scrape the dirt that tie on polished rod 6 surfaces, increase the smooth degree of polished rod 6, reduced the friction of polished rod and airtight and watertight padding, avoided the wearing and tearing and the loss of filler, thereby increased the cycle of changing airtight and watertight padding, prolong the effective time of sealer, alleviated working strength of workers, reduced crude oil loss and environment pollution.The utility model is just installed support 2, descaler 3 and base 4 in sealer can reach above purpose, and structure is very simple, implements easily, cheap, is suitable for applying.

Description of drawings: Fig. 1 is a structural representation of the present utility model.

The specific embodiment one: this device bottom is connected with pumpingh well blowout preventer top, oil pumping polish rod from the sealer center by and the centre bore that passes ring platform shape descaler 3 link to each other with the oil pumper polished rod eye.Present embodiment comprises sealer 1, sealing is housed in described sealer 1 scrapes dirty mechanism, described sealing is scraped dirty mechanism and is comprised support 2, descaler 3 and base 4, support 2 is fixed in the inside of sealer 1, support 2 is provided with groove 5, and base 4 is arranged on the bottom of groove 5 and is connected with support 2, and the edge of descaler 3 extend in the groove 5 and is brace table with base 4, base 4 can be fixedlyed connected with support 2, also can be to be threaded.Groove 5 on the support 2 is a truncated cone-shaped, descaler 3 is ring platform shape, the equal diameters in the interior circular diameter of descaler 3 and polished rod 6 cross sections, and the outside diameter of descaler 3 is less than the diameter of groove 5, like this, descaler 3 just can be done moving radially of certain limit in groove 5.Support 2 can be the ring platform shape of band groove, also can be the ring taper type of band groove.

The specific embodiment two: present embodiment with embodiment one different be that sealing is scraped dirty mechanism and comprised sealing and scrape dirty mechanism and lower seal is scraped dirty structure, last sealing is scraped dirty mechanism and is comprised upper bracket 2-1, last descaler 3-1 and upper bed-plate 4-1, lower seal is scraped dirty mechanism and is comprised lower carriage 2-2, following descaler 3-2 and lower bottom base 4-2, described upper bracket 2-1 is the ring platform shape of band groove 5-1, lower carriage 2-2 is the ring taper type of band groove 5-2, the lower end of the upper end of described upper bed-plate 4-1 and upper bracket 2-1 is by being threaded, fixedly connected with the lower end of lower carriage 2-2 in the upper end of described lower bottom base 4-2, last descaler 3-1 is a brace table with upper bed-plate 4-1, and following descaler 3-2 is a brace table with lower bottom base 4-2.When oil pumping polish rod 6 moves up and down, last sealing is scraped the last descaler 3-1 of dirty mechanism and following descaler 3-2 that lower seal is scraped dirty mechanism and is swung with the skew of polished rod 6 and move radially, focus automatically between bar 6 and sealer centre bore become big the gap carry out dynamic seal (packing), avoid the filler in the packing cavity from the slit of polished rod and sealer centre bore, to run off, the dirt of deposition on the simultaneously all right scraping polished rod 6, the smoothness that keeps polished rod, lower seal is scraped the ring conical cavity 8 that is surrounded by the lower carriage 2-2 that encircles the frustum shape in the dirty mechanism and can be produced radial centripetal power to the airtight and watertight padding of coming in from packing cavity simultaneously, strengthens sealing effectiveness.

Claims

1, a kind of radially following type polished rod sealer, its composition comprises sealer (1), it is characterized in that in described sealer (1), being equipped with sealing and scrape dirty mechanism, described sealing is scraped dirty mechanism and is comprised support (2), descaler (3) and base (4), support (2) is fixed in the inside of sealer (1), support (2) is provided with groove (5), base (4) is arranged on the bottom of groove (5) and is connected with support (2), and the edge of descaler (3) extend in the groove (5) and is brace table with base (4).

2, radially following type polished rod sealer according to claim 1, it is characterized in that the groove (5) on the support (2) is truncated cone-shaped, descaler (3) is ring platform shape, the equal diameters in the interior circular diameter of descaler (3) and polished rod (6) cross section, the outside diameter of descaler (3) is less than the diameter of groove (5).

3, radially following type polished rod sealer according to claim 1 and 2 is characterized in that the ring platform shape of described support (2) for band groove (5).

4, radially following type polished rod sealer according to claim 1 and 2 is characterized in that the ring taper type of described support (2) for band groove (5).

5, radially following type polished rod sealer according to claim 1 and 2, it is characterized in that sealing scrapes dirty mechanism and comprise sealing and scrape dirty mechanism and lower seal is scraped dirty structure, last sealing is scraped dirty mechanism and is comprised upper bracket (2-1), last descaler (3-1) and upper bed-plate (4-1), lower seal is scraped dirty mechanism and is comprised lower carriage (2-2), following descaler (3-2) and lower bottom base (4-2), described upper bracket (2-1) is the ring platform shape of band groove (5-1), lower carriage (2-2) is the ring taper type of band groove (5-2), the lower end of the upper end of described upper bed-plate (4-1) and upper bracket (2-1) is by being threaded, fixedly connected with the lower end of lower carriage (2-2) in the upper end of described lower bottom base (4-2), last descaler (3-1) is a brace table with upper bed-plate (4-1), and following descaler (3-2) is a brace table with lower bottom base (4-2).