CN201087709Y - Well-control valve switching device under pressure - Google Patents
Well-control valve switching device under pressure Download PDFInfo
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- CN201087709Y CN201087709Y CNU2007202008963U CN200720200896U CN201087709Y CN 201087709 Y CN201087709 Y CN 201087709Y CN U2007202008963 U CNU2007202008963 U CN U2007202008963U CN 200720200896 U CN200720200896 U CN 200720200896U CN 201087709 Y CN201087709 Y CN 201087709Y
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- blanking plug
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- hydraulic support
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Abstract
The utility model relates to a well control valve exchanging device with pressure and belongs to a device for well control operation, aiming at solving the problem existing in the prior art that a damaged valve of equipment at the well mouth of an oil-gas field is not easy to be exchanged or in the exchanging process, the time and the labor are wasted and the property consumption is large. The utility model comprises a hydraulic operation system, an underframe assembly, a lifting hydraulic supporting frame, a blanking plug assembly, a self-end enclosure assembly and a double flange short section assembly, wherein, the underframe assembly can be arranged above the well mouth; the lifting hydraulic supporting frame is arranged above the underframe assembly and connected with the underframe assembly; the upper end of the lifting hydraulic supporting frame is connected with a beam, and the lifting hydraulic supporting frame is connected with the hydraulic operation system; the blanking plug assembly is arranged above the lifting hydraulic supporting frame, and comprises a lift link which passes through the beam of the lifting hydraulic supporting frame and a plug rod shell which is sheathed outside the lift link, the lower end of the lift link is sheathed with a packing ring; the self-end enclosure assembly is sheathed outside the plug rod shell; the double flange short section assembly is connected and communicated with the self-end enclosure. The utility model is applied to the operation of exchanging damaged valve with pressure at the well mouth of an oil-gas field.
Description
Technical field
The utility model belongs to a kind of device of well control operation, and particularly a kind of well control band is pressed the device that changes valve.
Background technology
The oil recovery of petroleum industry, christmas tree, in the long-term at the scene process of using, because quality, performance and the seal of equipment is aging, and the H in the borehole fluid
2S and CO
2Contain corrosive material and can strengthen the wearing and tearing of the burn into of valve, so that cause the seepage of valve, the screw rod of valve, the long-term wearing and tearing of using of nut all may cause damage, just must change (maintenance) valve in this case.
In the many decades in the past, oil gas field changes the valve operation after (gas) tree of recovering the oil total valve takes place is damaged, often all be to adopt derrick is installed, and carry out the supporting a series of supporting facility of this work.A last cover drilling equipment is taked the method for kill-job, injects the mud of certain weight proportion by corresponding apparatus in well, make borehole pressure and head of liquid balance after, just can change or overhaul valve.This conventional method needs great amount of manpower and material resources, financial resources and time.
Abroad, in order to solve replacing (maintenance) problem that valve damages, be on the oil pipe gown, to have designed a connecting port that is the BPV valve, when main valve damages, use a kind of special tool, can under the normal pressure situation, go to stop up (sending into) or replacing (maintenance) that the way of taking out is finished main valve is worked.But, because the wearing and tearing in the long-term production process, and the H in the fluid
2S and CO
2The corrosion of corrosive substance, BPV valve thread abrasion, corrosion and the bad sealing in the oil pipe gown also can occur and produce seepage, can't the plugged well fluid pressure and make the BPV valve that the installation basis and the sealing part of other isolated plant can't be installed.
The utility model content
The purpose of this utility model be solve that prior art is difficult for changing the valve that the oil gas field wellhead equipment damages or the replacing process is time-consuming, effort, the wasteful problem of property, provide a kind of well control band to press and change valve gear, have simple in structure, easy and simple to handle, not only economy but also save operation time and artificial advantage.
The purpose of this utility model realizes by following technical proposals:
The well control band is pressed and is changed valve gear, comprises Hynautio-steering, can be arranged on the chassis assembly of well head top; The lifting hydraulic support that is arranged on the chassis assembly top and is attached thereto, the upper end of lifting hydraulic support is connected with crossbeam, and the lifting hydraulic support is connected with Hynautio-steering; Be arranged on the blanking plug assembly of lifting hydraulic support top, the blanking plug assembly includes the lifting arm of the crossbeam that passes the lifting hydraulic support and is enclosed within the outer bott stick shell of lifting arm, is with joint ring outside the lower end of lifting arm; Be sleeved on the outer self-styled head assembly of bott stick shell; Be connected the lower end of self-styled head assembly and the casing connecting spool assembly that communicates with it.
Described blanking plug assembly is installed on the crossbeam, also comprise the support bracket bolt that can be installed on the crossbeam, be connected the needle beam between the support bracket bolt, the upper end is passed needle beam and is installed in blanking plug body on the needle beam by hold-down nut, be arranged on the hoist cylinders of blanking plug underpart, the hoist cylinders lower end removably connects by the upper end of clip assembly and lifting arm, hoist cylinders are connected with Hynautio-steering, lifting arm top is provided with screw thread, and this thread jacket has the nut of setting upright that is complementary with it.
Described chassis assembly comprises support screw, the gripper shoe that is arranged on the support screw upper end and is attached thereto is provided with the benefit central layer above the gripper shoe, be provided with little pressing plate above the benefit central layer, the edge of gripper shoe is provided with the adjustment bolt that passes little pressing plate, and little pressing plate middle part has the perforation of adjustable aperture.
The conduit and the pressure monitor table that communicate with self-styled head assembly are installed on the following end flanges of described casing connecting spool assembly.
The lower end of described lifting hydraulic support and the upper surface of chassis assembly be for being rotatably connected, and be equipped with the fluid cylinder bracing frame.
The bottom of described bott stick shell and the top place that is positioned at joint ring are provided with the neck shape fight connection place of diameter less than its bar footpath, and the aperture of the perforation at above-mentioned little pressing plate middle part and the diameter of this fight connection place are complementary.
The utility model adopts and above well head oil pipe gown chassis assembly is set, with mounted thereto of lifting hydraulic support, again the blanking plug assembly is installed in above the crossbeam of lifting hydraulic support, hoist cylinders by the blanking plug assembly are mentioned lifting arm, the joint ring of its underpart is expanded block the internal diameter of oil pipe gown, make the bott stick shell of lifting arm outside sealed by self-styled head assembly and casing connecting spool assembly, by the magnitude relationship between monitoring retaining pressure of the pressure monitor table on the casing connecting spool assembly and the bottom pressure.
As seen, adopt the utility model of said structure, compared with prior art, can easily oil pipe gown internal diameter be blocked, bottom pressure is sent on the joint ring of chassis assembly and lifting arm, can disassembles easily then and the direct-connected damage valve of oil pipe gown, realize fast, save, change economically valve, and have simple in structure a, advantages of simple operation, carry out in the operation that replace with pressure damages valve applicable to the well head of oil gas field.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the superstructure schematic diagram of the blanking plug assembly in the utility model;
Fig. 3 is the schematic diagram that changes the outfit after the utility model stops up well head;
Fig. 4 is the lifting hydraulic support in the utility model and the substructure schematic diagram of blanking plug assembly;
Fig. 5 is the schematic diagram that changes the outfit after the utility model stops up well head;
Number in the figure, the 1st, blanking plug assembly, the 2nd, self-styled head assembly, the 3rd, the casing connecting spool assembly, the 4th, chassis assembly, 5 is No. five valves, 6 is No. two valves, the 7th, and the oil pipe gown, 8 is No. three valves, 9 is No. six valves, and 10 is valves, and 11 is No. four valves, the 12nd, conduit, the 13rd, pressure monitor table, the 14th, crossbeam, the 15th, set upright nut, the 16th, clip assembly, the 17th, support bracket bolt, the 18th, hold-down nut, the 19th, needle beam, the 20th, nut is installed, the 21st, lifting hydraulic support, the 22nd, bott stick shell, the 23rd, joint ring, the 24th, lifting arm, the 25th, hoist cylinders, the 26th, fluid cylinder bracing frame, the 27th, fight connection place, the 28th, mend central layer, the 29th, support screw, the 30th, little pressing plate, the 31st, blanking plug body.
The specific embodiment
Below in conjunction with specific embodiments and the drawings the utility model is further described.
As shown in Figure 1, the well control band is pressed and to be changed valve gear and comprise blanking plug assembly 1, lifting hydraulic support 21, self-styled head assembly 2, casing connecting spool assembly 3, can be arranged on chassis assembly 4 and Hynautio-steering on the oil pipe gown 7.
Two lifting hydraulic supports 21 are rotatably connected with the upper surface of chassis assembly 4, and the upper end of lifting hydraulic support 21 has screw thread, passes the two ends of crossbeam 14, are installed together with crossbeam 14 by nut 20 is installed.Lifting hydraulic support 21 is connected with Hynautio-steering and controlled by it.
Casing connecting spool assembly 3 is joint short tubes that two ends have flange, and it is equipped with conduit 12 and the pressure monitor table 13 that communicates with self-styled head assembly 2 on end flanges down.
The upper flanges of casing connecting spool assembly 3 is communicated with self-styled head assembly 2, and self-styled head assembly 2 is by housing and be arranged on parts such as piston in the housing, glue core, base pressure plate, seal, suspension ring and form.
As Fig. 1, Fig. 2, shown in Figure 4, blanking plug assembly 1 detachably is installed in the middle part of crossbeam 14.Blanking plug assembly 1 includes the lifting arm 24 that passes crossbeam 14 middle parts and is enclosed within lifting arm 24 bott stick shell 22 outward, is with joint ring 23 outside the lower end of lifting arm 24.The support bracket bolt 17 of blanking plug assembly 1 is installed on the crossbeam 14, is connected with needle beam 19 between the support bracket bolt 17.Blanking plug assembly 1 comprises that also the upper end passes needle beam 14 and be installed in blanking plug body 31 on the needle beam 14 by hold-down nut 18, and the hoist cylinders 25 that are arranged on blanking plug body 31 bottoms, the lower end of hoist cylinders 25 removably connects by the upper end of clip assembly 16 with lifting arm 24, hoist cylinders 25 are connected with Hynautio-steering, lifting arm 24 tops are provided with screw thread, this thread jacket have be complementary with it set upright nut 15, the bottom of bott stick shell 22 and the top place that is positioned at joint ring 23 are provided with the neck shape fight connection place 27 of diameter less than its bar footpath, and the aperture of the perforation at above-mentioned little pressing plate 30 middle parts and the diameter of this fight connection place 27 are complementary.
For ease of in changing the valve operation lifting hydraulic support 21 being tilted taking off self-styled head assembly 2 and casing connecting spool assembly 3, the well control band is pressed and is changed valve gear and also be equipped with fluid cylinder bracing frame 26.
Workplace of the present utility model and operating principle are as follows:
As shown in Figure 1, in the shaft mouth operation of oil gas field, need to change, can close a valve 10 and carry out operation as No. four valves 11 damages; Need to change as No. five valves 5 damages, can close No. two valves 6 and carry out operation; Need to change as No. six valves 9 damages, can close No. three valves 8 and carry out operation.If valve 10, No. two valves 6, No. three valves 8 damage when needing to change, because these three valves all directly are connected with oil pipe gown 7, just directly communicate with bottom pressure, then must take measures and to change, at this moment well control band pressure of the present utility model is changed valve gear and just can be used, and is specially adapted to the band pressure and exchanges valve 10 for No. one.
During operation, utilize the blue and connecting bolt installation connection benefit central layer 28 of upper surface valve of casing head, component such as assembling gripper shoe, support screw 29, little pressing plate 30 constitute chassis assembly 4.Adjusting support screw 29 puts in place, is locked, just formed working platform, and working platform and wellhead equipment casing head become an overall structure, become level with well head, support screw 29 has disperseed the weight of working platform and miscellaneous part, and has kept the firm and balance of working platform.
The lifting hydraulic support 21 that will be connected with Hynautio-steering is installed on the gripper shoe, makes it keep vertical permanent position with gripper shoe, puts on the pedestal Fixed latches and makes its above-mentioned plumbness.The perforation at crossbeam 14 two ends is buckled into the screw thread place, upper end of lifting hydraulic support 21, screw in these screw threads, make crossbeam 14 be installed in lifting hydraulic support 21 tops with nut 20 is installed.
The lifting arm 24 of blanking plug assembly 1 and outside bott stick shell 22 thereof are passed down through together self-styled head assembly 2, the casing connecting spool assembly 3 of connection, the following end flanges of casing connecting spool assembly 3 is connected with the upper flanges of No. four valves 11, and lifting arm 24 and outside bott stick shell 22 thereof are inserted into the last valve plate place that No. four valves 11 are closed.Open Hynautio-steering, conduit 12 by casing connecting spool assembly 3 injects the liquid pressurization to self-styled head assembly 2, self-styled head assembly 2 pressurisings are embraced bott stick shell 22 and lifting arm 24 and are set upright, control lifting hydraulic support 21 after setting upright to perpendicular to the gripper shoe state, and lifting according to circumstances or its position that descends.
The support bracket bolt 17 of blanking plug assembly 1 is installed on the crossbeam 14, other parts of blanking plug assembly 1 are installed in crossbeam 14 tops.The upper end of lifting arm 24 is upward through the middle part of crossbeam 14, with after setting upright nut 15 and being connected firmly.
Carry out following operation then:
1., handle reversal valve and open self-styled head assembly 2, in self-styled head assembly 2, fill clear water, to self-styled head assembly 2 pressurizations, embrace bott stick shell 22 then;
2., from the pressure meter cock of casing connecting spool assembly 3, to No. four valve 11 upper volume pressurisings, observe the reading of pressure monitor table 13, make No. four valve 11 upper pressure be slightly larger than bottom pressure (being the pressure in the oil pipe);
3., slowly open valve No. four, observe the pressure reading of the pressure monitor table 13 of casing connecting spool assembly 3, adjust the balance of the controlled pressure and the well head uplifting pressure of self-styled head assembly 2, and do not influence the flexibility that lifting arm 24 moves up and down;
4., connect with hoist cylinders 25, unclamp and set upright nut 15 with clip assembly 16 upper end with lifting arm 24;
5., lifting hydraulic support 21 slowly is moved downward to the appropriate location in the casing head oil pipe gown 7, at this moment should note measuring and observing the blanking plug packing element and arrive the definite position of stopping up in the oil pipe gown;
6., with hydraulic hand-pump to hoist cylinders 25 pressurization, lifting arm 24 moves up and makes joint ring 23 expandings seal up oil pipe gown 7, what screw (locking) lifting arm 24 upper ends sets upright nut 15;
7., from the slow pressure release of pressure meter cock of casing connecting spool assembly 3, the sealing reliability of blanking plug is determined in the variation of observing pressure monitor table 13, after confirming the complete drain charge of pressure of two flange assemblies 3, next step the operation of being allowed for access under the prerequisite of the no pressure demonstration of pressure monitor table 13.
Carry out the dismounting and change operation of valve then:
1., before the valve 10 change damaging, release the inherent controlled pressure of self-styled head assembly 2.
2., the nut that connects of valve 10 of dismounting and oil pipe cap.
3., together with the upwards slowly lifting of valve 11, casing connecting spool assembly 3, self-styled head assembly 2, when exposing the fight connection place 27 of bott stick shell 22, maintain static.
4., the little pressing plate 30 fight connection place 27 of clamping bott stick shell 22, its connection is pressed on the upper surface of mending central layer 28.There is the gap if mend the upper surface of central layer 28 and the lower surface of little pressing plate 30,, eliminates the gap by the nut of adjusting the adjustment bolt on the gripper shoe and reach and compress, the last top power of down-hole is delivered on the little pressing plate 30 according to the actual conditions adjustment.
In this state, lifting hydraulic support 21, blanking plug assembly 1 are stablized motionless, the method adjusting play that must not adopt blanking plug assembly 1 axially to move up and down can only take adjusting nut to eliminate the gap, and little pressing plate 30 must firmly connect on the end face that is pressed on benefit central layer 28.
5., the upper end of the lifting arm 24 of dismounting blanking plug assembly 1 and the coupling nut 32 between the crossbeam 14, this nut is positioned to be set upright below the nut 15, the move up top that makes blanking plug assembly 1 and crossbeam 14 of lifting hydraulic support 21 breaks away to the appropriate location, deflection lifting hydraulic support 21 and crossbeam 14 make 30 ° of positions of lifting hydraulic support 21 skew vertical lines.
6., lay down the top assembly of blanking plug assembly 1, unclamp clip assembly 16, make it to separate with lifting arm 24, lay down the coupling nut 32 of lifting arm 24 and crossbeam 14 then.
7., lifting hydraulic support 21 is upwards risen, crossbeam 14 is broken away from more than the shell 10mm of blanking plug assemblies 1.
8., lifting hydraulic support 21 and crossbeam 14 slowly are poured over (30 ° of fixed-site of vertical shift) on the fluid cylinder bracing frame 26
9., take off (hanging out) and separated the valve 10 of oil pipe gown, No. four valves 11 and self-styled head assembly 2, casing connecting spool assembly 3.
Unloading process is all finished.After finishing, off-line maintenance or more change jobs enters next step erection procedure.
Carry out the operation that changes the outfit of new valve at last:
1) be ready to the new valve that the process pressure testing is up to the standards, inspection pressure should be 1.5 times of this well actual pressure.
2) the blanking plug bar is nested in new valve and self-styled head assembly 2 and the casing connecting spool assembly 3.
3) set upright lifting hydraulic support 21 and crossbeam 14, and the top of the coupling nut on the lifting arm 24 32 with blanking plug assembly 1 is connected.
4) operation lifting hydraulic support 21 is slowly descending, when being positioned at little pressing plate 30 positions in fight connection place 27, feeling to stop after lax, and removes little pressing plate 30.
5) transfer new valve and self-styled head assembly 2, casing connecting spool assembly 3 and connect good seal with oil pipe cap flange; The Bolt Connection of new valve lower surface flange and oil pipe cap upper surface flange is firm, guarantee leakproof.
6) pressurising allows self-styled head assembly 2 seal up bott stick shell 22 in self-styled head assembly 2.
7) conduit 12 on the following end flanges of casing connecting spool assembly 3 is pressurized to pressure and the borehole pressure balance in the self-styled head assembly 2, and whether the check valve flange connects sealing good.
8) slight up and down lifting arm 24 backs promote and unload pine to hoist cylinders 25 pressurisings and set upright nut 15 and allow blanking plug assembly 1 deblocking (whether deblocking can be observed by the pressure monitor table 13 of release from casing connecting spool assembly 3).
9) pressurising in self-styled head assembly 2, allow self-styled head assembly 2 embrace and seal bott stick shell 22, hoist cylinders 25 slowly pressurization move up, the reading of the pressure monitor table 13 of close observation casing connecting spool assembly 3 changes, and unclamps and sets upright nut 15, transfers hoist cylinders 25, joint ring 23 is recovered, eliminate the expanding power of 1 pair of oil pipe gown 7 endoporus of blanking plug assembly, note adjusting the balance of self-styled head assembly 2 pressure and well head uplifting pressure, and do not influence the flexibility that blanking plug assembly 1 moves up and down.
10) pressurization makes lifting hydraulic support 21 slowly rise to lifting arm 24 to be positioned at end on the valve flashboard, valve-off, clip assembly 16 from pressure release on the casing connecting spool assembly 3 to zero back dismounting hoist cylinders 25 and blanking plug assembly 1, pull down the coupling nut 32 on the crossbeam 14, it is fixing that lifting hydraulic support 21 favours 30 ° of vertical lines.
11) open self-styled head assembly 2, propose (hanging out) blanking plug assembly 1.
12) remove each parts of special equipment in order respectively.
13) recover the oil (gas) is installed and is set the valve sets on top.
14) under the situation that main valve cuts out, top is connected carry out pressure testing respectively, be delivered for use after qualified.
Claims (6)
1. the well control band is pressed and is changed valve gear, comprises Hynautio-steering, it is characterized in that: also comprise,
Can be arranged on the chassis assembly (4) of well head top;
The lifting hydraulic support (21) that is arranged on chassis assembly (4) top and is attached thereto, the upper end of lifting hydraulic support (21) is connected with crossbeam (14), and lifting hydraulic support (21) is connected with Hynautio-steering;
Be arranged on the blanking plug assembly (1) of lifting hydraulic support (21) top, blanking plug assembly (1) includes the lifting arm (24) of the crossbeam (14) that passes lifting hydraulic support (21) and is enclosed within the outer bott stick shell (22) of lifting arm (24), is with joint ring (23) outside the lower end of lifting arm (24);
Be sleeved on the outer self-styled head assembly (2) of bott stick shell (22);
Be connected the lower end of self-styled head assembly (2) and the casing connecting spool assembly (3) that communicates with it.
2. the well control band is pressed and is changed valve gear according to claim 1, it is characterized in that: described blanking plug assembly (1) is installed on the crossbeam (14), also comprise the support bracket bolt (17) that can be installed on the crossbeam (14), be connected the needle beam (19) between the support bracket bolt (17), the upper end is passed needle beam (14) and is installed in blanking plug body (31) on the needle beam (14) by hold-down nut (18), be arranged on the hoist cylinders (25) of blanking plug body (31) bottom, hoist cylinders (25) lower end removably connects by the upper end of clip assembly (16) with lifting arm (24), hoist cylinders (25) are connected with Hynautio-steering, lifting arm (24) top is provided with screw thread, this thread jacket have be complementary with it set upright nut (15).
3. press as well control band as described in the claim 2 and change valve gear, it is characterized in that: described chassis assembly (4) comprises support screw (29), the gripper shoe that is arranged on support screw (29) upper end and is attached thereto, be provided with above the gripper shoe and mend central layer (28), be provided with little pressing plate (30) above mending central layer (28), the edge of gripper shoe is provided with the adjustment bolt that passes little pressing plate (30), and little pressing plate (30) middle part has the perforation of adjustable aperture.
4. press as well control band as described in the claim 3 and change valve gear, it is characterized in that: the conduit (12) and the pressure monitor table (13) that communicate with self-styled head assembly (2) are installed on the following end flanges of described casing connecting spool assembly (3).
5. press as well control band as described in the claim 4 and change valve gear, it is characterized in that: the upper surface of the lower end of described lifting hydraulic support (21) and chassis assembly (4) is for being rotatably connected, and is equipped with fluid cylinder bracing frame (26).
6. press as well control band as described in the claim 5 and change valve gear, it is characterized in that: the bottom of described bott stick shell (22) and the top place that is positioned at joint ring (23) are provided with the neck shape fight connection place (27) of diameter less than its bar footpath, and the aperture of the perforation at above-mentioned little pressing plate (30) middle part and the diameter of this fight connection place (27) are complementary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007202008963U CN201087709Y (en) | 2007-08-28 | 2007-08-28 | Well-control valve switching device under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007202008963U CN201087709Y (en) | 2007-08-28 | 2007-08-28 | Well-control valve switching device under pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201087709Y true CN201087709Y (en) | 2008-07-16 |
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ID=39635302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007202008963U Expired - Fee Related CN201087709Y (en) | 2007-08-28 | 2007-08-28 | Well-control valve switching device under pressure |
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| CN (1) | CN201087709Y (en) |
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| CN101691833A (en) * | 2008-12-31 | 2010-04-07 | 泸州川油钻采工具有限公司 | Mounting method and mounting device for replacing valve under pressure |
| CN103912230A (en) * | 2012-12-31 | 2014-07-09 | 托普威尔石油技术股份公司 | Non-releasing valve replacing device for casing valve |
| CN107900977A (en) * | 2017-12-25 | 2018-04-13 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of device and method for loading and unloading well head bottom flange |
| CN108301810A (en) * | 2018-03-20 | 2018-07-20 | 阜新市石油工具厂 | Direct-connected well head support hydraulic pressure petroleum lifting device |
| CN108469391A (en) * | 2018-03-26 | 2018-08-31 | 中铁工程装备集团有限公司 | A kind of replaceable cutterhead large circle tunneling boring wear detector of normal pressure |
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| CN109372471A (en) * | 2018-11-29 | 2019-02-22 | 美钻深海能源科技研发（上海）有限公司 | A kind of wellheadpressure valve switch failure maintenance of equipment and its method |
| CN110905445A (en) * | 2019-11-26 | 2020-03-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Valve leakage controller and method for gas well wellhead |
| CN111878020A (en) * | 2020-08-28 | 2020-11-03 | 西安九德创一科技有限公司 | Tool and method for replacing valve under pressure |
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| CN101691833B (en) * | 2008-12-31 | 2014-07-23 | 四川安捷油气技术服务有限公司 | Mounting method and mounting device for replacing valve under pressure |
| CN101691833A (en) * | 2008-12-31 | 2010-04-07 | 泸州川油钻采工具有限公司 | Mounting method and mounting device for replacing valve under pressure |
| CN103912230A (en) * | 2012-12-31 | 2014-07-09 | 托普威尔石油技术股份公司 | Non-releasing valve replacing device for casing valve |
| CN103912230B (en) * | 2012-12-31 | 2017-02-22 | 托普威尔石油技术股份公司 | Non-releasing valve replacing device for casing valve |
| CN107900977A (en) * | 2017-12-25 | 2018-04-13 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of device and method for loading and unloading well head bottom flange |
| CN108301810A (en) * | 2018-03-20 | 2018-07-20 | 阜新市石油工具厂 | Direct-connected well head support hydraulic pressure petroleum lifting device |
| CN108469391A (en) * | 2018-03-26 | 2018-08-31 | 中铁工程装备集团有限公司 | A kind of replaceable cutterhead large circle tunneling boring wear detector of normal pressure |
| CN108469391B (en) * | 2018-03-26 | 2024-04-16 | 中铁工程装备集团有限公司 | Big round of removable blade disc of ordinary pressure Ring full section wear detection device |
| CN108626478B (en) * | 2018-06-15 | 2024-03-12 | 焦作市恒利水文地质工程有限责任公司 | High-pressure water orifice valve switching device |
| CN108626478A (en) * | 2018-06-15 | 2018-10-09 | 焦作市恒利水文地质工程有限责任公司 | A kind of high pressure water aperture valve conversion equipment |
| CN109372471A (en) * | 2018-11-29 | 2019-02-22 | 美钻深海能源科技研发（上海）有限公司 | A kind of wellheadpressure valve switch failure maintenance of equipment and its method |
| CN109372471B (en) * | 2018-11-29 | 2023-09-26 | 美钻深海能源科技研发（上海）有限公司 | Wellhead pressurized valve switch failure maintenance equipment and method thereof |
| CN110905445B (en) * | 2019-11-26 | 2024-03-29 | 中国石油天然气集团有限公司 | Valve leakage controller and method for wellhead of gas well |
| CN110905445A (en) * | 2019-11-26 | 2020-03-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Valve leakage controller and method for gas well wellhead |
| CN111878020A (en) * | 2020-08-28 | 2020-11-03 | 西安九德创一科技有限公司 | Tool and method for replacing valve under pressure |
| CN111878020B (en) * | 2020-08-28 | 2024-04-16 | 西安东新石油设备厂有限公司 | Valve replacing tool with pressure and method |
| CN112343536A (en) * | 2020-11-03 | 2021-02-09 | 盐城市金巨石油机械制造有限公司 | Wellhead valve pressure replacing device and replacing method |
| CN113202432A (en) * | 2021-04-21 | 2021-08-03 | 梅宗禄 | High-pressure non-releasing pressure well head replacement main control valve device |
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