CN205936511U - Anticorrosive water conservancy diversion structure of well head - Google Patents

Abstract

The utility model discloses an anticorrosive water conservancy diversion structure of well head, which comprises a body, a supporting plate, spheroid and last ball seat, there is the feed liquor hole inside the opening of body, the lower part in the feed liquor hole is fixed to the backup pad, it fixes at feed liquor hole upper portion and its inside and feed liquor hole intercommunication to go up the ball seat, be provided with the back shaft in the middle part of the backup pad, the spring housing is established on the back shaft, it has a plurality of apertures to open in the backup pad, the top of spring is provided with the limiting plate, the clearance is left with the back shaft top in the limiting plate bottom, the ball seat is fixed on the limiting plate down, the through -hole that have with feed liquor hole intercommunication is opened at spheroid middle part, the connecting axle rotate to set up in the sleeve, and the tip of connecting axle is connected with spheroid upper portion. Through the intercommunication cross -section big or small regulation of adjustment mechanism to the feed liquor hole for on the oil gas of scurrying blockked, prevent that oil gas from flowing to scurry magnifying of the well head overflow that arouses or well kick accident, avoided the offset -tune emergence of well control.

Description

A kind of anti-corrosion flow-guiding structure of well head

Technical field

The utility model is related to natural gas extraction field and in particular to a kind of anti-corrosion flow-guiding structure of well head.

Background technology

In the drilling construction operation of natural gas well exploitation, formation fluid（Oil gas and water）Inevitably enter pit shaft, Generally, enter the formation fluid in pit shaft to pass through to be pressed in well weighted mud by kill manifold.When drilling is met extremely During high-pressure oil gas stratum, the gas stream on high-pressure oil gas stratum is altered under pressure and drives mud to converge together to well head, oil Alter on air-flow and cause Drilling Troubles, the lighter leads to well head overflow or well kick, severe one well control can be caused out of control it is generally the case that Easily cause gas blowout accident, and the kill-job operation of high-pressure oil-gas layer is difficult to carry out, upset being normally carried out of drilling well production operation.

Utility model content

The utility model purpose is to provide a kind of well head anti-corrosion flow-guiding structure, solves abnormal high in brill chance in prior art The problem easily causing blowout and being difficult to carry out the kill-job operation of high-pressure oil-gas layer existing during pressure hydrocarbon formations.

The utility model is achieved through the following technical solutions：

A kind of anti-corrosion flow-guiding structure of well head, including body, gripper shoe, spheroid and upper ball base, opens in described body interior There is inlet opening, described gripper shoe is fixed on the bottom of inlet opening, upper ball base is fixed on inlet opening top and its internal and inlet opening Connection, is provided with support shaft in the middle part of gripper shoe, spring is set in support shaft, has multiple apertures, spring on the supporting plate Top be provided with limiting plate, and gap is left on limiting plate bottom and support shaft top, and the setting of described support shaft upper end is flexible Cone, limiting plate bottom surface is embedded with the block rubber just to cone, and lower ball base is fixed on limiting plate, described upper ball base and lower ball base Between formed a spherical blowout prevention cavity, spheroid is rotatably arranged in described blowout prevention cavity, and has in the middle part of described spheroid The through hole connecting with inlet opening；Also include governor motion, described governor motion includes sleeve and the connecting shaft running through this body sidewall, Described connecting shaft is rotatably arranged in sleeve, and described connecting shaft one end is connected with spheroid top, and the connecting shaft other end is along body footpath To stretching out, the pod apertures of axis and connecting shaft diameter parallel are provided with sleeve, the two ends of pod apertures are respectively at inlet opening And external world's connection, this body sidewall is provided with cannelure, and sleeve is divided into two parts by described cannelure, in connecting shaft Block is installed, described block is slidably arranged in cannelure, under initial operating mode, described block by the middle part of pod apertures with its two End isolation.For in prior art, when drilling meets abnormal pressure hydrocarbon formations, the gas stream on high-pressure oil gas stratum is made in pressure With altering on lower and driving mud to converge together to well head, gas stream is altered and causes Drilling Troubles, the lighter leads to well head overflow or well Gush, severe one can cause well control out of control it is generally the case that easily causing gas blowout accident, inventor passes through to arrange blowout prevention dress in well head Put, by governor motion to the connection cross-sectional sizes of inlet opening adjust so that on the oil gas altered be blocked, that is, hinder gas stream Alter in continuation, prevent the extension of the well head overflow causing or well kick accident is altered on gas stream, it is to avoid the sending out of well control imbalance Raw, reduce the probability of happening of blowout, to reduce the impact to drilling progress for the drilling process mesohigh oil gas.

Concrete operations are as follows, when running into abnormal pressure hydrocarbon formations, by rotating the extension in body exterior for the connecting shaft Part is so that there is the rotation of certain angle in spheroid, and now the through hole in the middle part of spheroid is mutually completely cut off with inlet opening, i.e. upper ball base And spheroid between, the circulation road of body interior is blocked, the gas stream above altered is blocked in below spheroid, now on inlet opening End injection drilling fluid, after spheroid top is subject to the impact of drilling fluid, starts to move down, gap occurs between spheroid and upper ball base, Drilling fluid is then flowed into the hypomere of inlet opening by this gap location, enters in well finally by the multiple apertures in gripper shoe to carry out Circulation kill-job operation, and then ensure being normally carried out of drilling well production operation.When running into the hydrocarbon formations of abnormal pressure, spheroid with And upper ball base the dynamics that is hit excessive it is easy to cause damage, therefore on the side wall of body, offer pod apertures, with timely Down-hole is depressured, and under initial operating mode, this pod apertures is blocked by block all the time, that is, inlet opening cannot pass through pod apertures It is connected with the external world, and when down-hole pressure reaches a critical value, needs spheroid that the carrying out of inlet opening is insulated, now the company of rotation Spindle so that while spheroid rotates, drives block to rotate in cannelure, until pod apertures are no longer influenced by restriction and straight Connect and be in communication with the outside, and this kind of mode of communicating is not to drain in the air by directly outer for oil gas, but by special container to this Oil gas is collected；By the packing to inlet opening upper end for the spheroid, pass through simultaneously pod apertures to the pressure release of inlet opening side wall so that It is ensured that each part of body interior is injury-free in the case that abnormal pressure in down-hole.

And when spheroid moves down so that lower ball base drives limiting plate to take advantage of a situation and draws close to support shaft, now spring is compressed, by Can not be too high in the momentum when injecting inlet opening for the drilling fluid, to avoid generation between the moment upper ball base of injection is with spheroid Gap is excessive and lead to alter ejection on oil gas, it follows that the coefficient of elasticity phase of spring matching with injection mud flow rate To less, it is highly prone to when using damage and causes the seal failure to inlet opening for the spheroid, the utility model is in limiting plate Bottom embeds block rubber, simultaneously the top of support shaft arrange have resilient cone, when limiting plate moves down, cone first with Block rubber contacts, and produces deformation by contact between block rubber and cone, with secondary spring to spheroid, lower ball base and spacing Impact forces suffered by plate, and then substantially reduce the stand under load intensity of spring so that the injection progress of drilling fluid is hindered with spheroid Realize balance between the efficiency altered on the oil gas of gear down-hole, improve the protection of each part to body interior to the full extent Degree.

Also include baffle ring and the limited block that cyclization is constituted is closed by left ring body, right ring body, baffle ring is connected to limited block Middle part, described upper ball base upper surface is provided with stair-stepping contact surface, and described limited block lower surface and baffle ring lower surface are respectively It is connected with described contact surface.On the oil gas altered be applied directly on spheroid outer wall so that spheroid is subject to making vertically upward With stress, same spheroid can form certain impact to upper ball base, once and spheroid generation is along the jump on body axis direction Dynamic, the connecting shaft being connected with spheroid can distort and occur stress impaired, therefore arrange limited block and baffle ring on inlet opening top, Upper ball base can be carried out with two grades of reinforcings, it is to avoid upper ball base loosens in this internal appearance and extends the position that spheroid moves upwards and produces Move it is ensured that spheroid keeps stable working condition in the Oil/gas Well of abnormal pressure.

The supporting positive cover being connected with inlet opening inwall is provided with described gripper shoe, described righting set upper side end is prolonged upwards Extend the middle part of spheroid.In the rotation that spheroid is carried out by the continuous impact of gas stream, using supporting positive cover to spheroid outer wall Restriction, to maintain the tie point around it with connecting shaft for the spheroid to do the circular motion of rule, prevent spheroid from circular runout occurring, protect Card spheroid and the stability of upper ball base.

Described sleeve lining is additionally provided with O-ring seal.Preferably, one end of connecting shaft is connected with spheroid, its The other end stretches out after running through sleeve, and the O-ring seal increasing on sleeve lining can improve the air-tightness of body itself, Improve the isolation effect of the gas stream that spheroid is altered on to down-hole.

The utility model compared with prior art, has such advantages as and beneficial effect：

1st, the utility model pass through governor motion to the regulation of the connection cross-sectional sizes of inlet opening so that on the oil gas quilt altered Stop, that is, hinder and alter in gas stream continuation, prevent the extension of the well head overflow causing or well kick accident is altered on gas stream, keep away Exempt from the generation of well control imbalance, reduced the probability of happening of blowout, to reduce the shadow to drilling progress for the drilling process mesohigh oil gas Ring；

2nd, the contact that the utility model passes through between block rubber and cone produces deformation, with secondary spring to spheroid, lower ball Impact forces suffered by seat and limiting plate, and then substantially reduce the stand under load intensity of spring so that being injected into of drilling fluid Realize balance between the efficiency altered on oil gas under degree and spheroid barrierwell, improve each part to body interior to the full extent Protection；

3rd, the utility model arranges limited block and baffle ring on inlet opening top, upper ball base can be carried out with two grades of reinforcings, keep away Exempt from upper ball base this internal occur loosening and extend the displacement that spheroid moves upwards and produce it is ensured that spheroid abnormal pressure oil Stable working condition is kept in gas well.

Brief description

Accompanying drawing described herein is used for providing the utility model embodiment is further understood, and constitutes the one of the application Part, does not constitute the restriction to the utility model embodiment.In the accompanying drawings：

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

Fig. 2 is the structural representation of governor motion；

Fig. 3 is the cooperation figure of limiting plate and support shaft.

Mark and corresponding parts title in accompanying drawing：

The left ring body of 1- body, 2-, 3- inlet opening, 4- through hole, 5- spheroid, 6- lower ball base, 7- spring, 8- support shaft, 9- prop up Fagging, 10- aperture, 11- baffle ring, the right ring body of 12-, 13- upper ball base, 14- governor motion, 141- sleeve, 142- connecting shaft, 143- Pod apertures, 144- block, 145- cannelure, 15- supporting positive cover, 16- limiting plate, 17- block rubber, 18- cone.

Specific embodiment

For making the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing, The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this Utility model, is not intended as to restriction of the present utility model.

Embodiment 1

As shown in Fig. 1 ~ 3, the present embodiment includes body 1, gripper shoe 9, spheroid 5 and upper ball base 13, in described body 1 Portion has inlet opening 3, and described gripper shoe 9 is fixed on the bottom of inlet opening 3, upper ball base 13 be fixed on inlet opening 3 top and its in Portion is connected with inlet opening 3, is provided with support shaft 8 in the middle part of gripper shoe 9, and spring 7 is set in support shaft 8, opens in gripper shoe 9 There are multiple apertures 10, the top of spring 7 is provided with limiting plate 16, and gap is left with support shaft 8 top in limiting plate 16 bottom, institute State support shaft 8 upper end and resilient cone 18 is set, limiting plate 16 bottom surface is embedded with the block rubber 17 just to cone 18, lower ball base 6 It is fixed on limiting plate 16, between described upper ball base 13 and lower ball base 6, forms a spherical blowout prevention cavity, spheroid 5 rotates and sets Put in described blowout prevention cavity, and have the through hole 4 connecting with inlet opening 3 in the middle part of described spheroid 5；Also include governor motion 14, described governor motion 14 includes sleeve 141 and the connecting shaft 142 running through body 1 side wall, and described connecting shaft 142 rotates setting In sleeve 141, described connecting shaft 142 one end is connected with spheroid 5 top, and connecting shaft 142 other end radially outward prolongs along body 1 Stretch, the pod apertures 143 of axis and connecting shaft 142 diameter parallel are provided with sleeve 141, the two ends of pod apertures 143 are respectively at entering Fluid apertures 3 and extraneous connection, are provided with cannelure 145 on body 1 side wall, and sleeve 141 are divided into two by described cannelure 145 Part, is provided with block 144, described block 144 is slidably arranged in cannelure 145, in initial operating mode in connecting shaft 142 Under, pod apertures 143 middle part is completely cut off by described block 144 with its two ends.

For in prior art, when drilling meets abnormal pressure hydrocarbon formations, the gas stream on high-pressure oil gas stratum is in pressure Alter on effect is lower and drive mud to converge together to well head, gas stream is altered and causes Drilling Troubles, the lighter lead to well head overflow or Well kick, severe one can cause well control out of control it is generally the case that easily causing gas blowout accident, and inventor passes through to arrange blowout prevention in well head Device, by governor motion 14 to the connection cross-sectional sizes of inlet opening 3 adjust so that on the oil gas altered be blocked, that is, hinder Gas stream is altered on continuing, and prevents from altering the extension of the well head overflow causing or well kick accident in gas stream, it is to avoid well control mistake The generation adjusted, reduces the probability of happening of blowout, to reduce the impact to drilling progress for the drilling process mesohigh oil gas.

Concrete operations are as follows, when running into abnormal pressure hydrocarbon formations, by rotating connecting shaft 142 outside body 1 Extension is so that there is the rotation of certain angle in spheroid 5, and now the through hole 4 at spheroid 5 middle part is mutually completely cut off with inlet opening 3, Between upper ball base 13 and spheroid 5, the circulation road within body 1 is blocked, the gas stream above altered is blocked in below spheroid 5, this When inject drilling fluid to inlet opening 3 upper end, after spheroid 5 top is subject to the impact of drilling fluid, start to move down, spheroid 5 and upper ball base Gap occurs, drilling fluid is then flowed into the hypomere of inlet opening 3 by this gap location, finally by multiple in gripper shoe 9 between 13 Aperture 10 enters into be circulated kill-job operation in well, and then ensures being normally carried out of drilling well production operation.When running into exception During the hydrocarbon formations of high pressure, the dynamics that is hit of spheroid 5 and upper ball base 13 excessive it is easy to cause damage, therefore in body 1 Side wall on offer pod apertures 143, to be depressured to down-hole in time, and under initial operating mode, this pod apertures 143 all the time by Block 144 is blocked, and that is, inlet opening 3 cannot be connected with the external world by pod apertures 143, and work as down-hole pressure and reach a critical value When, needing spheroid 5 that the carrying out of inlet opening 3 is insulated, now rotating connecting shaft 143 so that while spheroid 5 rotates, carrying Dynamic block 144 rotates in cannelure 145, until pod apertures 143 are no longer influenced by limiting and are directly in communication with the outside, and this kind of company Logical mode is not to drain in the air by directly outer for oil gas, but by special container, this oil gas is collected；By spheroid 5 Packing to inlet opening 3 upper end, simultaneously by pod apertures 143 to the pressure release of inlet opening 3 side wall so that abnormal pressure in down-hole In the case of it is ensured that each part within body 1 is injury-free.

And when spheroid 5 moves down so that lower ball base 6 drives limiting plate 16 to take advantage of a situation and draws close to support shaft 8, now spring 7 quilt Compression, because the momentum when injecting inlet opening 3 for the drilling fluid can not be too high, to avoid in the moment upper ball base 13 injecting with spheroid The gap producing between 5 is excessive and lead to alter ejection on oil gas, it follows that the spring 7 matching with injection mud flow rate Coefficient of elasticity relatively small, that is, use when be highly prone to damage and cause the seal failure to inlet opening 3 for the spheroid 5, this reality Apply example and embed block rubber 17 in limiting plate 16 bottom, arrange on the top of support shaft 8 simultaneously and have resilient cone 18, spacing When plate 16 moves down, cone 18 is contacted with block rubber 17 first, produces deformation by the contact between block rubber 17 and cone 18, with Secondary spring 7 is to spheroid 5, lower ball base 6 and the impact forces suffered by limiting plate 16, and then substantially reduces being subject to of spring 7 Carry intensity so that realizing balance between the efficiency altered on oil gas under the injection progress of drilling fluid and spheroid 5 barrierwell, in maximum journey Protection to each part within body 1 is improved on degree.

The present embodiment also includes baffle ring 11 and closes the limited block that cyclization is constituted, baffle ring 11 by left ring body 2, right ring body 12 Be connected to the middle part of limited block, described upper ball base 13 upper surface is provided with stair-stepping contact surface, described limited block lower surface with And baffle ring 11 lower surface is connected with described contact surface respectively.On the oil gas altered be applied directly on spheroid 5 outer wall so that spheroid 5 By an applied stress vertically upward, same spheroid 5 can form certain impact to upper ball base 13, once and spheroid 5 Occur along beating on body 1 axis direction, the connecting shaft 142 being connected with spheroid 5 can distort and occur stress impaired, therefore exist Inlet opening 3 top setting limited block and baffle ring 11, can carry out two grades of reinforcings, it is to avoid upper ball base 13 is in body 1 to upper ball base 13 Interior occur loosening and extend the displacement that spheroid 5 moves upwards and produce it is ensured that spheroid 5 keeps steady in the Oil/gas Well of abnormal pressure Fixed working condition.

Wherein, the supporting positive cover 15 being connected with inlet opening 3 inwall is provided with described gripper shoe 9, on described supporting positive cover 15 End end extends upwardly to the middle part of spheroid 5.During the rotation being subject to the continuous impact of gas stream in spheroid 5 and carrying out, using helping Just covering 15 restrictions to spheroid 5 outer wall, to maintain spheroid 5 to do regular circular motion around it with the tie point of connecting shaft 142, preventing Only there is circular runout it is ensured that the stability of spheroid 5 and upper ball base 13 in spheroid 5.

Preferably, one end of connecting shaft 142 is connected with spheroid 5, its other end stretches out after running through sleeve 141, and The O-ring seal increasing on sleeve 141 inwall can improve body 1 air-tightness of itself, improves what spheroid 5 was altered on to down-hole The isolation effect of gas stream.And, the present embodiment also can brush on inlet opening 3, aperture 10 and through hole 4 inwall one layer anti-corrosion Coating, to reduce cavitation erosion or the corrosion phenomenon of in the hole wall, extends its service life.

Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect One step describes in detail, be should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equivalent replaces Change, improve, should be included within protection domain of the present utility model.

Claims (2)

1. the anti-corrosion flow-guiding structure of a kind of well head, including body（1）, gripper shoe（9）, spheroid（5）And upper ball base（13）, described Body（1）Inside has inlet opening（3）It is characterised in that：Described gripper shoe（9）It is fixed on inlet opening（3）Bottom, upper ball base （13）It is fixed on inlet opening（3）Top and its internal and inlet opening（3）Connection, in gripper shoe（9）Middle part is provided with support shaft （8）, spring（7）It is set in support shaft（8）On, in gripper shoe（9）On have multiple apertures（10）, spring（7）Top setting Limited location plate（16）, and limiting plate（16）Bottom and support shaft（8）Gap is left on top, described support shaft（8）Upper end is provided with The cone of elasticity（18）, limiting plate（16）Bottom surface is embedded with just to cone（18）Block rubber（17）, lower ball base（6）It is fixed on spacing Plate（16）On, described upper ball base（13）With lower ball base（6）Between formed a spherical blowout prevention cavity, spheroid（5）Rotate setting In described blowout prevention cavity, and in described spheroid（5）Middle part has and inlet opening（3）The through hole of connection（4）；Also include regulation machine Structure（14）, described governor motion（14）Including running through body（1）The sleeve of side wall（141）And connecting shaft（142）, described connecting shaft （142）It is rotatably arranged on sleeve（141）Interior, described connecting shaft（142）One end and spheroid（5）Top connects, connecting shaft（142）Separately One end is along body（1）Extend radially outwardly, in sleeve（141）It is provided with axis and connecting shaft（142）The pod apertures of diameter parallel （143）, pod apertures（143）Two ends respectively at inlet opening（3）And external world's connection, in body（1）Side wall is provided with cannelure （145）, and described cannelure（145）By sleeve（141）It is divided into two parts, in connecting shaft（142）On block is installed （144）, described block（144）It is slidably arranged in cannelure（145）Interior, under initial operating mode, described block（144）By pod apertures （143）Middle part and the isolation of its two ends；Also include baffle ring（11）And by left ring body（2）, right ring body（12）Closing cyclization is constituted Limited block, baffle ring（11）It is connected to the middle part of limited block, described upper ball base（13）Upper surface is provided with stair-stepping contact surface, institute State limited block lower surface and baffle ring（11）Lower surface is connected with described contact surface respectively；In described sleeve（141）On inwall also It is provided with O-ring seal.

2. a kind of anti-corrosion flow-guiding structure of well head according to claim 1 it is characterised in that：In described gripper shoe（9）On set It is equipped with and inlet opening（3）The supporting positive cover that inwall connects（15）, described supporting positive cover（15）Upper end end extends upwardly to spheroid（5）'s Middle part.