CN201068774Y

CN201068774Y - Large passage plunger piston reciprocating mechanical dynamic seal wellhead

Info

Publication number: CN201068774Y
Application number: CNU2007201172373U
Authority: CN
Inventors: 张佳民; 胡松华; 白存安
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2007-10-19
Filing date: 2007-10-19
Publication date: 2008-06-04
Anticipated expiration: 2017-10-19

Abstract

The utility model discloses a wellhead which is sealed by the reciprocating mechanical moving of the large channel plunger piston, and relates to the wellhead adopted in the oil production field of an oilfield. The utility model solves the problem existing in the prior double distance flexible type pumping unit that the wellhead sealing is bad. The lower part of an upper mandrel hanger (8) is fixed with the upper part of a second screw short-circuit (11), the lower part of the second screw short-circuit (11) is fixed with the upper part of a reducer union (12), the lower part of the reducer union (12) is fixed with the upper part of the pump barrel of a sealed pump (9), the upper mandrel hanger (8) is fixed in the internal part of an upper big cross joint (7) through screw, the lower part of a lower mandrel hanger (3) is fixed with the upper part of a first screw short-circuit (4), the lower part of the first screw short-circuit (4) is fixed with the upper part of a coupling (5), and the lower part of the coupling (5) is fixed with the upper part of an oil string. The utility model has the advantages that the structure is simple, the operations of pump detection, etc. are facilitated, the operation technics is simplified, the working efficiency is improved, the cost of activity is reduced, the sealing effect is good, and the wellhead environment can be prevented from being polluted.

Description

Macroscopic path plunger reciprocating machinery dynamic-sealing mine mouth

Technical field

The utility model relates to used well head in the oil recovery field, a kind of oil field, is specifically related to a kind of macroscopic path plunger reciprocating machinery dynamic-sealing mine mouth.

Background technology

Along with continually developing of oil field, in the quantity of the especially low liquid producing well of low liquid producing well constantly increase, according to incompletely statistics, the well of Daqing output below 10t/d had nearly ten thousand mouthfuls, along with the continuous development of technology, in order to adapt to the needs of different productive lives, mechanical oil recovery equip ment from the beam pumping unit to the submersible electric pump, screw pump etc., of a great variety, but for a long time, below individual well production fluid amount 20t/d, the special Lifting Technique that especially is lower than 10t/d does not also reach ideal effect far away.Demand for low liquid producing well in adapting to, only beam pumping unit and screw pump are carried out coming into operation after the simple miniaturization, make that the individual well output capacity is more and more lower, the disposable input height of beam pumping unit, the drawback that energy consumption is big are also apparent more outstanding, have caused the indisputable fact of " stripper well is exactly the invalid well of poor efficiency ".Therefore, very urgent to the special Lifting Technique demand of low liquid producing well in being adapted to.At present, low liquid producing well adopts multiple-stroke flexible beam pumping unit lifting well liquid, it is low that it has power consumption, advantages such as disposable input is low, be well received, but multiple-stroke flexible beam pumping unit adopts flexible drive to replace existing rigidity transmission body, but also will big as far as possible passage, makes multiple-stroke flexible beam pumping unit have the bad problem of well head sealing.

The utility model content

The purpose of this utility model is in order to solve the bad problem of well head sealing that existing multiple-stroke flexible beam pumping unit exists, so provide a kind of simple in structure, help examining operation such as pump, simplified operation technique, operating efficiency height, operating cost are low, good sealing effect, prevent to pollute the macroscopic path plunger reciprocating machinery dynamic-sealing mine mouth of well head environment.

The technical solution of the utility model is: macroscopic path plunger reciprocating machinery dynamic-sealing mine mouth comprises big four down, sleeve pipe, following tubing hanger, first flat short circuit, box cupling, tubing string, last big four, last tubing hanger, the canned pump pump barrel, upper flange, second flat short circuit, reducer union, the clip short circuit head, the bleed off pipe joint, adpting flange, lower flange and flexible drive, the bottom of described lower flange and the top of sleeve pipe are affixed, be connected with down big four on the upper surface of lower flange, to pass through bolt affixed with the upper surface of the lower surface of last big four and following big four respectively for the upper surface of adpting flange and lower surface, the upper surface of last big four and the lower surface of upper flange are affixed by bolt, the clip short circuit head is fixed on the upper surface of upper flange, the bottom of described upward tubing hanger and the top of second flat short circuit are affixed, the bottom of second flat short circuit and the top of reducer union are affixed, the top of the bottom of reducer union and canned pump pump barrel is affixed, described upward tubing hanger is fixed on the inside of big four by jackscrew, the bottom of described tubing hanger down and the top of first flat short circuit are affixed, the bottom of first flat short circuit and the top of box cupling are affixed, the bottom of box cupling and the top of tubing string are affixed, described tubing hanger down is fixed on down the inside of big four by jackscrew, described bleed off pipe joint be connected on the big cylindrical of upper flange and with the internal communication of upper flange, flexible drive is arranged on the canned pump pump barrel, second flat short circuit, last tubing hanger, in the ring cavity that upper flange and clip short circuit head form.

The utlity model has following beneficial effect: canned pump pump barrel of the present utility model, tubing string, box cupling, first flat short circuit, time tubing hanger, reducer union, second flat short circuit, last tubing hanger form ring cavity, well liquid can only flow out through last big four by ring cavity, flexible drive links to each other with the plunger of canned pump, by plunger well liquid is cut off, make the well head good sealing effect of multiple-stroke flexible beam pumping unit.Adpting flange makes well head link to each other with oil pumper, has alleviated the weight of oil pumper, and the weight of oil pumper is moved on on the well head as much as possible, thereby the one-time investment of oil pumper has been reduced on the basis of having simplified oil pumper.Elasticity oil scraping plate of the present utility model can prevent that sump oil from polluting well head environment on every side.With of the present utility model go up canned pump that tubing hanger and bottom thereof connect and below rod member take out after, can produce big passage, help examining operations such as pump, simplified operation technique, improved operating efficiency, reduced operating cost.

Description of drawings

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

The specific embodiment

The specific embodiment one: present embodiment is described in conjunction with Fig. 1, present embodiment is by following big four 1, sleeve pipe 2, following tubing hanger 3, first flat short circuit 4, box cupling 5, tubing string 6, last big four 7, last tubing hanger 8, canned pump pump barrel 9, upper flange 10, second flat short circuit 11, reducer union 12, clip short circuit head 13, bleed off pipe joint 16, adpting flange 17, lower flange 19 and flexible drive 21 are formed, the top of the bottom of described lower flange 19 and sleeve pipe 2 is affixed, be connected with down big four 1 on the upper surface of lower flange 19, the upper surface of adpting flange 17 and lower surface are affixed with the upper surface of the lower surface of last big four 7 and following big four 1 respectively, the lower surface of the upper surface of last big four 7 and upper flange 10 is affixed, clip short circuit head 13 is fixed on the upper surface of upper flange 10, the bottom of described upward tubing hanger 8 and the top of second flat short circuit 11 are affixed, the top of the bottom of second flat short circuit 11 and reducer union 12 is affixed, the top of the bottom of reducer union 12 and canned pump pump barrel 9 is affixed, described upward tubing hanger 8 is fixed on the inside of big four 7 by jackscrew, the bottom of described tubing hanger 3 down and the top of first flat short circuit 4 are affixed, the top of the bottom of first flat short circuit 4 and box cupling 5 is affixed, the top of the bottom of box cupling 5 and tubing string 6 is affixed, described tubing hanger 3 down is fixed on down the inside of big four 1 by jackscrew, the big cylindrical 10-1 that described bleed off pipe joint 16 is connected upper flange 10 go up and with the internal communication of upper flange 10, flexible drive 21 is arranged on canned pump pump barrel 9, second flat short circuit 11, last tubing hanger 8, in the ring cavity that upper flange 10 and clip short circuit head 13 form.

The specific embodiment two: present embodiment is described in conjunction with Fig. 1, the difference of the present embodiment and the specific embodiment one is that it has also increased elasticity oil scraping plate 15, and described elasticity oil scraping plate 15 is fixed in the ring cavity that forms between upper flange 10 and the clip short circuit head 13 by clip 14.So be provided with, unnecessary lubricating oil and the impurity on the flexible drive 21 can be scraped off, prevent that sump oil from polluting well head environment on every side.Other composition is identical with the specific embodiment one with annexation.

The specific embodiment three: present embodiment is described in conjunction with Fig. 1, the difference of the present embodiment and the specific embodiment one is the lower surface of the upper flange 10 of present embodiment, the upper surface of last big four 7 and lower surface, the upper surface of adpting flange 17 and lower surface, the upper surface of following big four 1 and lower surface, be provided with groove 20 on the upper surface of lower flange 19, groove 20 on the upper surface of last big four 7 and the lower surface is corresponding with the groove 20 on the upper surface of the lower surface of upper flange 10 and adpting flange 17 respectively and form ring cavities 22, and the groove 20 on the upper surface of following big four 1 and the lower surface is corresponding with the groove 20 on the upper surface of the lower surface of adpting flange 17 and lower flange 19 respectively and form ring cavities 22.So be provided with, for movable sealing provides accommodation space.

The specific embodiment four: in conjunction with Fig. 1 present embodiment is described, the difference of the present embodiment and the specific embodiment one is that present embodiment has also increased sealing ring 18, and described sealing ring 18 is arranged in the ring cavity 22.Strengthened movable sealing between each part by sealing ring 18.Other composition is identical with the specific embodiment one with annexation.

Claims

1. macroscopic path plunger reciprocating machinery dynamic-sealing mine mouth, it comprises big four (1) down, sleeve pipe (2), following tubing hanger (3), first flat short circuit (4), box cupling (5), tubing string (6), last big four (7), last tubing hanger (8), canned pump pump barrel (9), upper flange (10), second flat short circuit (11), reducer union (12), clip short circuit head (13), bleed off pipe joint (16), adpting flange (17), lower flange (19) and flexible drive (21), the top that it is characterized in that the bottom of described lower flange (19) and sleeve pipe (2) is affixed, be connected with down big four (1) on the upper surface of lower flange (19), to pass through bolt affixed with the upper surface of the lower surface of last big four (7) and following big four (1) respectively for the upper surface of adpting flange (17) and lower surface, the lower surface of the upper surface of last big four (7) and upper flange (10) is affixed by bolt, clip short circuit head (13) is fixed on the upper surface of upper flange (10), the bottom of described upward tubing hanger (8) and the top of second flat short circuit (11) are affixed, the top of the bottom of second flat short circuit (11) and reducer union (12) is affixed, the top of the bottom of reducer union (12) and canned pump pump barrel (9) is affixed, described upward tubing hanger (8) is fixed on the inside of big four (7) by jackscrew, the bottom of described tubing hanger (3) down and the top of first flat short circuit (4) are affixed, the top of the bottom of first flat short circuit (4) and box cupling (5) is affixed, the top of the bottom of box cupling (5) and tubing string (6) is affixed, described tubing hanger (3) down is fixed on down the inside of big four (1) by jackscrew, the big cylindrical (10-1) that described bleed off pipe joint (16) is connected upper flange (10) go up and with the internal communication of upper flange (10), flexible drive (21) is arranged on canned pump pump barrel (9), second flat short circuit (11), last tubing hanger (8), in the ring cavity that upper flange (10) and clip short circuit head (13) form.

2. according to the described macroscopic path plunger reciprocating machinery dynamic-sealing mine mouth of claim 1, it is characterized in that it also comprises elasticity oil scraping plate (15), described elasticity oil scraping plate (15) is fixed in the ring cavity that forms between upper flange (10) and the clip short circuit head (13) by clip (14).

3. according to the described macroscopic path plunger reciprocating machinery dynamic-sealing mine mouth of claim 1, the lower surface that it is characterized in that described upper flange (10), the upper surface and the lower surface of last big four (7), the upper surface and the lower surface of adpting flange (17), the upper surface and the lower surface of following big four (1), be provided with groove (20) on the upper surface of lower flange (19), groove (20) on the upper surface of last big four (7) and the lower surface is corresponding with the groove (20) on the upper surface of the lower surface of upper flange (10) and adpting flange (17) respectively and form ring cavity (22), and the groove (20) on the upper surface of following big four (1) and the lower surface is corresponding with the groove (20) on the upper surface of the lower surface of adpting flange (17) and lower flange (19) respectively and form ring cavity (22).

4. according to the described macroscopic path plunger reciprocating machinery dynamic-sealing mine mouth of claim 3, it is characterized in that it also comprises sealing ring (18), described sealing ring (18) is arranged in the ring cavity (22).