CN208441797U - Reinforcing rotatory sealing well head is rinsed outside a kind of oil-water well production casing - Google Patents

Abstract

The utility model, which provides, rinses reinforcing rotatory sealing well head outside a kind of oil-water well production casing, including lower slips assembly, casing head housing assembly, production casing centralizer, it is eccentrically rotated flushing machine, the plug that is eccentrically rotated for being eccentrically rotated flushing machine was not only rotated relative to the casing head ontology of casing head housing assembly, but also was rotated relative to production casing centralizer.The side outlet of described sleeve pipe head ontology connects side outlet flap type.It washes pipe to be inserted into the eccentric orfice for being eccentrically rotated plug, and washes pipe lower end and protrude into the annular space between outer tube and production casing.The utility model insulates the annular space between outer tube (surface pipe or protective casing) and production casing, annular space sundries can be returned out from side outlet when clearing up annular space, flange can push by hydraulic motor and deceleration mechanism simultaneously and rotated, it is ensured that 360 ° of cleanings comprehensively are carried out to annular space.It can be used as wellhead assembly when well cementation, play sealing and side opening returns the function of slurry.

Description

Reinforcing rotatory sealing well head is rinsed outside a kind of oil-water well production casing

Technical field

The utility model relates to oilfield oil well production casing cement to return flushing and Reinforcement outside the above free pipe of height Technology, especially a kind of oil-water well production casing rinse reinforcing rotatory sealing well head outside.

Background technique

With oil field development work deepen continuously, ultra-high water-containing development late stage is stepped into oil field, cover bad well increase year by year, by Year aggravation.Especially well shallow-layer set blind hole speedup is accelerated in recent years, the main reason is that due to adding outside production casing without cement Gu so that external casing corrosion is serious.Such as east China oil field will find that water is returned on well ground by the end of the end of the year 2017 altogether Shallow-layer covers 337 mouthfuls of blind hole, increases nearly 20 mouthfuls of wells every year on average.

Grease well cement is administered at present return height or more and cover there are mainly three types of the methods of damage: first is that changing set.Oil-water well changes set energy Enough retaining sleeve latus rectums, are conducive to the smooth tripping in of later period oil-water well bar, pipe, pump and downhole tool, and this method is suitable for full well Casing is preferable, the oil-water well of 500 meters or more superficial part casing leakages, but oil-water well changes set and needs overhaul, construction site require compared with Height, costly, average individual well expense is up to 650,000 yuan, furthermore oil-water well changes set and leaks section just for set, other casings are afterwards Set leakage may occur in production process again, need to change set again；Second is that grout off.Oil-water well set damage grout off can also be protected Run through casing size is held, it is at low cost, but the stratum as locating for shallow-layer casing, than relatively soft, cement presence is poor, and dosage is big, while successfully Rate is lower, and validity period is short；Third is that inside pipe casing blocks reinforcement technique.Such method is the casing in the smaller internal diameter of inside pipe casing It is consolidated with cement, it is inconsistent above and below Casing Failure latus rectum after being administered due to set damage although validity period is longer, affect the later period The tripping in of grease well pump and downhole tool can not carry out fascicule and tap the latent power and seperated layer water injection.

The above free pipe second consolidation improvement of height is returned in order to meet cement outside production casing, oil-water well can be extended by reaching The service life of shallow-layer casing can guarantee the constant of latus rectum again, and meet the smooth tripping in of later period pump, downhole tool, guarantee oil-water well rhythm Rule layer is taped the latent power and the demand of seperated layer water injection, proposes that the outer cement of oil-water well production casing returns the above free pipe second consolidation of height and administers Technology realizes the purpose for extending oil-water well shallow-layer set tube lifetime, has invented grease well cement and has returned flushing outside the above free pipe of height And second consolidation rotatory sealing well head, it adapts to development late stage oil-water well and continues efficiently production and water filling demand, reach oil-water well The application of shallow-layer free pipe long-life, has an effect for oil field upgrading synergy.

Application number: 201410255755.6, publication date 2014-08-13 discloses a kind of rotary sealing appts comprising quiet Sealing ring, rotating seal ring, rotating seal ring fit together with stationary seal ring, which is characterized in that described to paste with stationary seal ring The sealing surface of the rotating seal ring of conjunction be equipped with curved groove, the curved groove be from rotating seal ring outer circle slope inwardly extend but With the disjunct swivelling chute of rotating seal ring inner circle, being situated between rotating seal ring and stationary seal ring binding face by sealing is entered It is thrown away when matter rotates with curved groove centrifugation, the inclined direction of the curved groove and the direction of rotation of rotating seal ring are consistent.This reality With novel by the way that curved groove is arranged on rotating seal ring sealing surface, make to attempt the sealed medium stream by hydrostatic seal region It is discharged to the excircle of seal face, to form a high pressure relative to sealing medium at the outer circle of seal face Region substantially increases the sealing performance and reliability of the device, simultaneously to prevent sealed medium by the high-pressure area Improve service life.

Application number: 201120162968.6, publication date 2012-06-27 discloses a kind of rotary sealing device for wellhead of oil well, Drill string rotating operation or realized when stopping operation to well head seals in petroleum industry workover treatment.The present apparatus include upper housing, Lower case, central tube, square bushing, seal capsule and gland assembly, for seal capsule loaded in central tube, central tube is mounted on upper casing In body and lower case, thrust bearing and base bearing are housed between central tube and upper housing, on the top of central tube and seal capsule Square bushing and gland assembly are installed by portion, and alignment bearing is housed in the lower section of base bearing, the centre bore of seal capsule not similar shape with one heart. The problem of the utility model is additionally arranged alignment bearing, and solving central tube lower part, to hold supporting point off axis longer, is easy to happen swing, Also there is preferable raising to the sealing effect of its underpart.Expand the scope of application simultaneously, be adapted to cylindrical drill string and Rectangular drill string.

Application number: 201710987834.X, publication date 2018-02-16 disclose a kind of testing pressure of well head rotary sealing type Casing blanking plug, including hanger, tubing nipple, lifting sleeve, packing element, packing element central tube, pedestal, pedestal bearing, lead screw, hang Hanging device top surface side wall is machined with jackscrew slot, and side is equipped with hanger stripper rubber, and tubing nipple is connected to hanger bottom, in Portion's Side wall drill has the pressure testing hole for the outflow of pressure testing liquid body, and lifting sleeve is covered in tubing nipple bottom outside, lifts the upper of sleeve Wide sawtooth pattern motion thread is machined in through hole, lead screw runs through entire testing pressure of well head rotary sealing type casing blanking plug, silk The length of motion thread on thick stick is longer than upper through hole, and packing element central tube bottom end hangs on pedestal bearing top, packing element center Tube top end is hung in lifting sleeve, and packing element covers on packing element central tube, and lead screw bottom and datum axle are contracted in the base, in silk Immediately lead screw transmission thread portions install limited block on thick stick.It ensure that the easy to operate, safe and reliable of testing pressure of well head.

By the retrieval to keywords such as rotatory sealing, well head cleanings, discovery is in above-mentioned several open files no matter in skill The technical issues of art scheme, solution and technical effect etc., are different from, and also do not have technical inspiration.

Utility model content

The purpose of the utility model is to provide reinforcing rotatory sealing well head is rinsed outside a kind of oil-water well production casing, externally Annular space between casing (surface pipe or protective casing) and production casing is insulated, can be miscellaneous by annular space when clearing up annular space Object is returned out from side outlet, while to flange can push by hydraulic motor and deceleration mechanism and be rotated, it is ensured that 360 ° of cleanings comprehensively are carried out to annular space.It can be used as wellhead assembly when well cementation, play sealing and side opening returns the function of slurry.

The purpose of this utility model can be achieved by the following technical measures:

It includes that lower slips assembly, casing casing are total that reinforcing rotatory sealing well head is rinsed outside the oil-water well production casing At further including production casing centralizer, be eccentrically rotated flushing machine, described sleeve pipe casing assembly includes casing head ontology, institute It states and at least opens up two side outlets radially penetrated through in the middle part of casing head ontology, it is total that described sleeve pipe head ontology lower end connects lower slips At the lower slips assembly is fastened in housing pipe outer wall, and wherein outer sleeve upper protrudes into casing head ontology, described sleeve pipe head Housing static seal structure is arranged in inner body wall, and housing static seal structure makes casing head inner body wall and housing pipe outer wall be in sealing State；The flushing machine that is eccentrically rotated includes being eccentrically rotated plug, washing pipe, blowout prevention flange, and the plug that is eccentrically rotated opens up center Hole and eccentric orfice, the production casing centralizer are mounted in centre bore, and production casing centralizer lower end connects on production casing End, production casing are concentrically located inside outer tube, and the pipe of washing is inserted into eccentric orfice, and is washed pipe lower end and protruded into outer tube and life It produces in the annular space between casing, the blowout prevention flange is connect by hold-down bolt with casing head ontology, and pressure is installed on hold-down bolt Tight nut, blowout prevention flange lower end surface, which is pressed in, to be eccentrically rotated on end face beyond the Great Wall, and the plug lower semisection that is eccentrically rotated protrudes into casing head sheet In vivo, eccentric plug rotary seal structure is arranged in described sleeve pipe head inner body wall, and eccentric plug rotary seal structure makes casing head ontology Inner wall is in sealing state with wall beyond the Great Wall is eccentrically rotated, described to be eccentrically rotated plug inner wall setting centralizer rotary seal structure, helps Positive device rotary seal structure makes to be eccentrically rotated between plug inner wall and production casing centralizer in sealing state；It is described to be eccentrically rotated Plug was not only rotated relative to casing head ontology, but also was rotated relative to production casing centralizer.

The purpose of this utility model can be also achieved by the following technical measures:

Described to be eccentrically rotated the flared end of end setting beyond the Great Wall, lower end surface and the casing head ontology upper surface of the flared end open up phase Corresponding raceway, raceway is interior to place pressure-bearing steel ball.

Blowout prevention flange lower end surface, which is pressed in the pressure for being eccentrically rotated and generating on end face beyond the Great Wall, will guarantee not interfering eccentric rotation Rotoplug rotates freely.

The production casing centralizer includes box cupling connector, righting pull rod, described to be eccentrically rotated on the centre bore that plug opens up Half section of installation righting pull rod, centre bore lower semisection install box cupling connector, and the box cupling upper end of joint connects righting pull rod, lower distal process Production casing is connected outside centre bore out, the righting pull rod opens up outer silk, and righting pull rod upper end protrudes outside central tube, installs pull rod Nut, pull-rod nut lower end surface are kept off on being eccentrically rotated end face beyond the Great Wall.

Described to wash pipe and be locked at eccentric orfice upper port by washing pipe lock sleeve, the pipe outer wall suit of washing washes the seal of tube Set, washing seal of tube set makes to wash pipe outer wall and be eccentrically rotated plug eccentric orfice inner wall to be in sealing state.

The side outlet of described sleeve pipe head ontology connects side outlet flap type.

The lower slips assembly includes lower slips seat, lower slips, this body support frame, lower slips bolt, lower slips nut, lower card Watt be located at lower slips seat in, lower slips are fastened in housing pipe outer wall, this body support frame covers on outside lower slips seat, lower slips bolt It is connected on casing head ontology after sequentially passing through the top surface of lower slips seat, this body support frame, lower slips bolt installs lower slips nut.

The eccentric plug rotary seal structure includes the first annular slot that casing head inner body wall opens up and is mounted on The first rotating seal ring in one annular groove；The centralizer rotary seal structure includes being eccentrically rotated plug inner wall to open up the second ring Shape slot and the second rotating seal ring being mounted in the second annular groove；The housing static seal of described sleeve pipe head inner body wall setting Structure includes the third annular groove that casing head inner body wall opens up and the stationary seal ring being mounted in third annular groove.

The utility model has the advantages that compared with prior art

Utility model device is the key device applied to casing annulus cleaning, main function be to surface pipe or Annular space between protective casing and production casing is insulated, and can return annular space sundries from side outlet when clearing up annular space Out, while flange can push by hydraulic motor and deceleration mechanism and rotated, it is ensured that annular space carry out 360 ° it is complete Face cleaning.It can be used as wellhead assembly when well cementation, play sealing and side opening returns the function of slurry.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model embodiment；

Fig. 2 is the detailed marking structure schematic diagram of the utility model embodiment.

In figure: lower slips assembly 1, production casing centralizer 2, casing head housing assembly 3 and being eccentrically rotated flushing machine 4；

Lower slips bolt 10, lower slips nut 11, lower slips seat 12, lower slips 13, this body support frame 14；

Box cupling connector 20, righting pull rod 21 and pull-rod nut 22；

Casing head ontology 30, housing static seal structure 31, side outlet flap type 32, centralizer rotary seal structure 33, partially Heart plug rotary seal structure 34, pressure-bearing steel ball 35；

It is eccentrically rotated plug 40, blowout prevention flange 41, pipe lock sleeve 42 is washed, washes seal of tube set 43, clamp nut 44, hold-down bolt 45。

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Figure 1 to Figure 2, reinforcing rotatory sealing well head is rinsed outside the oil-water well production casing includes lower slips assembly 1, casing head housing assembly 3 further includes production casing centralizer 2, is eccentrically rotated flushing machine 4, described sleeve pipe casing assembly Including casing head ontology 30, two side outlets radially penetrated through, described sleeve pipe head sheet are at least opened up in the middle part of described sleeve pipe head ontology Body lower end connects lower slips assembly 1, and the lower slips assembly is fastened in housing pipe outer wall, and wherein outer sleeve upper protrudes into casing In head ontology, housing static seal structure 31 is arranged in described sleeve pipe head inner body wall, and housing static seal structure makes in casing head ontology Wall and housing pipe outer wall are in sealing state；The flushing machine that is eccentrically rotated includes being eccentrically rotated plug 40, washing pipe, blowout prevention flange 41, the plug that is eccentrically rotated opens up centre bore and eccentric orfice, and the production casing centralizer 2 is mounted in centre bore, production set 2 lower end of pipe centralizer connects production casing upper end, and production casing is concentrically located inside outer tube, and the pipe of washing is inserted into eccentric orfice It is interior, and wash pipe lower end and protrude into the annular space between outer tube and production casing, the blowout prevention flange 41 by hold-down bolt 45 with Casing head ontology 40 connects, and clamp nut 44 is installed on hold-down bolt, blowout prevention flange lower end surface, which is pressed in, is eccentrically rotated end face beyond the Great Wall On, 40 lower semisections of plug that are eccentrically rotated protrude into casing head ontology 30, and described sleeve pipe head inner body wall is arranged eccentric plug and rotates Sealing structure 34, eccentric plug rotary seal structure make casing head inner body wall and are eccentrically rotated wall beyond the Great Wall and are in sealing state, institute State and be eccentrically rotated plug inner wall setting centralizer rotary seal structure 33, centralizer rotary seal structure make to be eccentrically rotated plug inner wall and Sealing state is between production casing centralizer；The plug that is eccentrically rotated not only was rotated relative to casing head ontology, but also relative to The rotation of production casing centralizer.

Described to be eccentrically rotated the flared end of end setting beyond the Great Wall, lower end surface and the casing head ontology upper surface of the flared end open up phase Corresponding raceway, raceway is interior to place pressure-bearing steel ball 35.

Blowout prevention flange lower end surface, which is pressed in the pressure for being eccentrically rotated and generating on end face beyond the Great Wall, will guarantee not interfering eccentric rotation Rotoplug rotates freely.Blowout prevention flange and be eccentrically rotated beyond the Great Wall end face because of narrow space, top can not flared end, because there is bolt to keep off, Complete rotation can not be formed if flared end.Because contact surface is narrow at this, flange hardness, surface smoothness are higher, and friction is small. But still can improve again, following method may be selected: insert space is limited, in contact surface sintered hard alloy, And it is milled to high light cleanliness, reduce the frictional force between two contact surfaces.

The production casing centralizer includes box cupling connector 20, righting pull rod 22, the center for being eccentrically rotated plug and opening up Hole upper semisection installs righting pull rod 22, and centre bore lower semisection installs box cupling connector 20, and box cupling upper end of joint connects righting pull rod, connects Production casing is connected outside the prominent centre bore in hoop connector lower end, the righting pull rod opens up outer silk, the prominent center in righting pull rod upper end Pipe is outer, installs pull-rod nut 21, and pull-rod nut lower end surface is kept off on being eccentrically rotated end face beyond the Great Wall.

Described to wash pipe and be locked at eccentric orfice upper port by washing pipe lock sleeve 42, the pipe outer wall suit of washing washes the seal of tube Set 43, washing seal of tube set makes to wash pipe outer wall and be eccentrically rotated plug eccentric orfice inner wall to be in sealing state.

The side outlet of described sleeve pipe head ontology connects side outlet flap type 32.

The lower slips assembly includes lower slips seat 12, lower slips 13, this body support frame 14, lower slips bolt 10, lower slips Nut 11, lower slips are located in lower slips seat, and lower slips are fastened in housing pipe outer wall, this body support frame covers on outside lower slips seat Portion, lower slips screw bolt passes lower slips seat, this body support frame top surface after be connected on casing head ontology 30, lower slips bolt Lower slips nut is installed.

The eccentric plug rotary seal structure includes the first annular slot that casing head inner body wall opens up and is mounted on The first rotating seal ring in one annular groove；The centralizer rotary seal structure includes being eccentrically rotated plug inner wall to open up the second ring Shape slot and the second rotating seal ring being mounted in the second annular groove；The housing static seal of described sleeve pipe head inner body wall setting Structure includes the third annular groove that casing head inner body wall opens up and the stationary seal ring being mounted in third annular groove.

In short, the utility model primary structure is by lower slips assembly 1, production casing centralizer 2, casing head housing assembly 3 It is formed with equal four parts of flushing machine 4 are eccentrically rotated.Wherein lower slips assembly 1 by lower slips bolt 10, lower slips nut 11, under The composition such as slip spider 12, lower slips 13, this body support frame 14；Production casing centralizer 2 is by box cupling connector 20, righting pull rod 22 and draws The composition such as stem nut 21；Casing head housing assembly 3 by casing head ontology 30, housing static seal structure 31, side outlet flap type 32, The composition such as centralizer rotary seal structure 33, eccentric plug rotary seal structure 34, pressure-bearing steel ball 35；It is eccentrically rotated flushing machine 4 By being eccentrically rotated plug 40, blowout prevention flange 41, washing pipe lock sleeve 42, wash seal of tube set 43, clamp nut 44, the groups such as hold-down bolt 45 At.

Its working principle is that: the lower slips 13 in lower slips assembly 1 embrace surface pipe or protective casing seat in lower slips On seat 12, it is connect with lower slips bolt 10, lower slips nut 11 with casing head housing assembly 3, makes surface pipe or protective casing An entirety is formed with whole device；This body support frame 14 plays the role of Auxiliary support to whole device.

Production casing centralizer 2 connects production casing box cupling by box cupling connector 20, passes through righting pull rod 21 and pull rod spiral shell Female 22 pairs of production casings carry out righting, it is ensured that production casing and surface pipe or protective casing are concentric；It is revolved simultaneously by centralizer Turn sealing structure 33 and be eccentrically rotated to be formed between flushing machine 4 to seal.

Casing head housing assembly 3 is sealed surface pipe or protective casing by housing static seal structure 31, close Envelope is nonmetallic static seal structure, and seal form can be injection molding sealing or non-injection molding sealing；Pass through eccentric plug rotatory sealing knot Structure 34 is sealed with plug 40 is eccentrically rotated；Its side opening, which plays the role of 2 side outlet flap types 32, to be played and returns slurry, while effectively being kept away Exempt to wash the defect for returning slurry insufficient space when pipe rotates to side opening.

It is eccentrically rotated flushing machine 4 and is connect with casing head housing assembly 3 with clamp nut 44, hold-down bolt 45, pass through pressure Tight blowout prevention flange 41 is transferred to the annular pressure that plug 40 is born is eccentrically rotated on casing head housing assembly 3, and prevents from being eccentrically rotated Plug 40 is scurried out because of annular pressure；Being eccentrically rotated plug 40 and casing head ontology 30 has nitridation raceway, intermediate to be contacted with pressure-bearing steel ball 35, Sliding friction is changed to rolling friction, substantially reduces coefficient of friction, reduces rotation torque；It washes pipe lock sleeve 42 and washes the seal of tube 43 pairs of set washes pipe and is locked and sealed, and guarantees that well-flushing is pressure export on the side outlet of casing head housing assembly 3, favorably Slurry effect is returned in well-flushing.

Centralizer rotary seal structure 33, eccentric plug rotary seal structure 34, housing static seal structure 31 constitute this reality With new device to the sealing structure of casing annulus, casing annulus is sealed.

Being eccentrically rotated 40 tops of plug has radial lever screw hole.

After capable of connecting with extension bar, manpower drives the component to rotate, while top Excircle machining has gear structure, energy and tooth It after taking turns mechanism connection, is rotated with electric power or the hydraulic drive component, can be realized can be manually rotated and automatic rotating integratedization.

In the description of the present invention, it should be understood that the instruction in orientation or positional relationship are based on shown in attached drawing Orientation or positional relationship, be merely for convenience of description the utility model, rather than the device or element of indication or suggestion meaning It must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (8)

1. rinsing reinforcing rotatory sealing well head outside a kind of oil-water well production casing, including lower slips assembly, casing casing are total At, which is characterized in that further include production casing centralizer, be eccentrically rotated flushing machine, described sleeve pipe casing assembly includes set Tube head ontology, described sleeve pipe head ontology middle part at least open up two side outlets radially penetrated through, and described sleeve pipe head ontology lower end connects Lower slips assembly is connect, the lower slips assembly is fastened in housing pipe outer wall, and wherein outer sleeve upper protrudes into casing head ontology, Housing static seal structure is arranged in described sleeve pipe head inner body wall, and housing static seal structure makes outside casing head inner body wall and outer tube Wall is in sealing state；The flushing machine that is eccentrically rotated includes being eccentrically rotated plug, washing pipe, blowout prevention flange, described to be eccentrically rotated Plug opens up centre bore and eccentric orfice, and the production casing centralizer is mounted in centre bore, the connection of production casing centralizer lower end Production casing upper end, production casing are concentrically located inside outer tube, and the pipe of washing is inserted into eccentric orfice, and are washed pipe lower end and protruded into In annular space between outer tube and production casing, the blowout prevention flange is connect by hold-down bolt with casing head ontology, compresses spiral shell Clamp nut is installed, blowout prevention flange lower end surface, which is pressed in, to be eccentrically rotated on end face beyond the Great Wall, and the plug lower semisection that is eccentrically rotated is stretched on bolt Enter in casing head ontology, eccentric plug rotary seal structure is arranged in described sleeve pipe head inner body wall, and eccentric plug rotary seal structure makes It casing head inner body wall and is eccentrically rotated wall beyond the Great Wall and be in sealing state, described to be eccentrically rotated plug inner wall setting centralizer rotation close Seal structure, centralizer rotary seal structure make to be eccentrically rotated between plug inner wall and production casing centralizer in sealing state；Institute It states and is eccentrically rotated plug not only relative to the rotation of casing head ontology, but also relative to the rotation of production casing centralizer.

2. rinsing reinforcing rotatory sealing well head outside a kind of oil-water well production casing according to claim 1, feature exists In described to be eccentrically rotated the flared end of end setting beyond the Great Wall, the lower end surface of the flared end opens up corresponding with casing head ontology upper surface Raceway, pressure-bearing steel ball is placed in raceway.

3. rinsing reinforcing rotatory sealing well head, feature outside a kind of oil-water well production casing according to claim 1 or 2 It is, blowout prevention flange lower end surface, which is pressed in the pressure for being eccentrically rotated and generating on end face beyond the Great Wall, will guarantee not interfere to be eccentrically rotated plug It rotates freely.

4. rinsing reinforcing rotatory sealing well head, feature outside a kind of oil-water well production casing according to claim 1 or 2 It is, the production casing centralizer includes box cupling connector, righting pull rod, the centre bore upper semisection for being eccentrically rotated plug and opening up Righting pull rod is installed, centre bore lower semisection installs box cupling connector, and the box cupling upper end of joint connects righting pull rod, during lower end is prominent Production casing is connected outside heart hole, the righting pull rod opens up outer silk, and righting pull rod upper end protrudes outside central tube, installs pull rod spiral shell Mother, pull-rod nut lower end surface are kept off on being eccentrically rotated end face beyond the Great Wall.

5. rinsing reinforcing rotatory sealing well head, feature outside a kind of oil-water well production casing according to claim 1 or 2 It is, described to wash pipe and be locked at eccentric orfice upper port by washing pipe lock sleeve, the pipe outer wall suit of washing washes seal of tube set, washes Seal of tube set makes to wash pipe outer wall and be eccentrically rotated plug eccentric orfice inner wall to be in sealing state.

6. rinsing reinforcing rotatory sealing well head, feature outside a kind of oil-water well production casing according to claim 1 or 2 It is, the side outlet of described sleeve pipe head ontology connects side outlet flap type.

7. rinsing reinforcing rotatory sealing well head, feature outside a kind of oil-water well production casing according to claim 1 or 2 It is, the lower slips assembly includes lower slips seat, lower slips, this body support frame, lower slips bolt, lower slips nut, lower slips In lower slips seat, lower slips are fastened in housing pipe outer wall, this body support frame covers on outside lower slips seat, lower slips bolt according to It is connected on casing head ontology behind the secondary top surface for passing through lower slips seat, this body support frame, lower slips bolt installs lower slips nut.

8. rinsing reinforcing rotatory sealing well head, feature outside a kind of oil-water well production casing according to claim 1 or 2 It is, the eccentric plug rotary seal structure includes the first annular slot that casing head inner body wall opens up and is mounted on the first ring The first rotating seal ring in shape slot；The centralizer rotary seal structure includes being eccentrically rotated plug inner wall to open up the second annular groove And it is mounted on the second rotating seal ring in the second annular groove；The housing static seal structure of described sleeve pipe head inner body wall setting The third annular groove opened up including casing head inner body wall and the stationary seal ring being mounted in third annular groove.