CN103128530A - Tool for replacing No.1 main valve of oil gas well mouth device in snubbing well under pressure - Google Patents
Tool for replacing No.1 main valve of oil gas well mouth device in snubbing well under pressure Download PDFInfo
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- CN103128530A CN103128530A CN2013100686187A CN201310068618A CN103128530A CN 103128530 A CN103128530 A CN 103128530A CN 2013100686187 A CN2013100686187 A CN 2013100686187A CN 201310068618 A CN201310068618 A CN 201310068618A CN 103128530 A CN103128530 A CN 103128530A
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Abstract
The invention belongs to the technical field of oil field equipment, and relates to a tool for replacing a No.1 main valve of an oil gas well mouth device in a snubbing well under pressure. The tool of a hydraulic structure comprises an upper body and a lower body which are connected through guide pillars, and a piston rod penetrates between the upper body and the lower body and is provided with clamps. The upper body is provided with a liquid inlet, a hydraulic cylinder, a cap, a cylinder cover and a lifting ring are arranged at the upper end of the upper body. The lower body is connected with a unidirectional back pressure valve through the piston rod, a short joint and a feed head and a discharge head of the unidirectional back pressure valve. The upper body and the lower body are communicated through a stop valve and a connecting pipe and provided with pressure gauges. The tool is safe and reliable, feeds the unidirectional back pressure valve into a suspender preset with a back pressure valve thread by means of the principle of pressure balance, seals downhole fluid and replaces the main valve. Cost is save, work efficiency is improved, and production of a well mouth can be restored in short time under condition of the snubbing well by the aid of the tool for replacing the No.1 main valve of an oil gas well mouth device in the snubbing well under pressure.
Description
Technical field
The invention belongs to the oilfield equipment technical field, relate to the instrument of No. 1 main valve of not kill-job of oil gas field wellhead assembly replace with pressure Oil/gas Well wellhead assembly, particularly No. 1 main valve of replace with pressure.
Background technology
In the oil-gas mining process, wellhead assembly is main bearing device, and this equipment mainly is comprised of a plurality of valves and flange, four-way and suspension arrangement, and wherein valve is to control the pressure of well head and flow.Valve invalidation is common fault, if but untimely processing will cause money waste, the pollution of environment.Sometimes even go back entail dangers to resident's life safety of periphery.
The way that adopts at present is that the liquid with certain weight proportion injects into well, thereby makes the weight of fluid column seal downhole fluid greater than down-hole pressure, and then the replacing main valve, then open flow, resumes production at last.This Period Process is long, and expense is high, and contaminated environment, and in Well Killing Process is due to the underproduction that has been pressed into some other dielectrically inhibited rock gap and can causes oil gas.
Summary of the invention
The present invention is in order to overcome above this technical difficulty, and provides a kind of rational in infrastructure, and is safe and reliable, i.e. the convenient instrument of No. 1 main valve of not kill-job of timesaving replace with pressure Oil/gas Well wellhead assembly again.
The technical scheme that the technical problem that the present invention solves adopts is: the instrument of No. 1 main valve of not kill-job replace with pressure Oil/gas Well wellhead assembly, it is characterized in that described instrument is hydraulic structure, comprise upper and lower body, upper and lower body connects by guide pillar, the centre is penetrated with piston rod, and clip is arranged on piston rod; On described upper body, inlet is arranged, there are hydraulic cylinder and cap, cylinder cap and suspension ring in the upper end; Described lower body gets, send head to connect the one-way back pressure valve by piston rod, pipe nipple and one-way back pressure valve; Described upper and lower body is by being communicated with stop valve and communicating pipe and being provided with Pressure gauge.
The present invention has the following advantages:
1, safe and reliable, valve converting tool utilizes pressure balanced principle that the one-way back pressure valve is sent in the hanger that is designed with in advance the counterbalance valve screw thread, seals downhole fluid, then changes main valve;
2, save cost, improve work efficiency, this changes valve gear can make well head resume production under the prerequisite of not kill-job in a short period of time.If adopt well-killing valve replacing once to need the cost of 50 to 1,000,000 yuan, only need the cost of 1 to 20,000 yuan and adopt this valve converting tool with pressure to change a valve.
3, reduce environmental pollution.
Description of drawings
Fig. 1 is No. 1 main valve mounting structure schematic diagram of embodiment of the present invention replace with pressure.
Fig. 2 is the structural representation of embodiment of the present invention instrument.
Fig. 3 is that in embodiment, the one-way back pressure valve takes out the header structure schematic diagram.
Fig. 4 is that in embodiment, the one-way back pressure valve is sent into the header structure schematic diagram.
In figure, the 1-main valve; 2-one-way back pressure valve; Head is got, sent to 3-one-way back pressure valve, and 3-1-takes out head, and 3-2-sends into head; 4-stop valve A; The 5-pipe nipple; Body under 6-; The 7-piston rod; The 8-guide pillar; The 9-clip; The 10-inlet; The 11-upper body; The 12-hydraulic cylinder; The 13-suspension ring; The 14-cylinder cap; 15-and cap; 16-stop valve B; 17-communicating pipe; The 18-Pressure gauge; The 19-shutoff valve C.
The specific embodiment
The present invention is further described below in conjunction with embodiment and accompanying drawing.
Embodiment: the instrument of No. 1 main valve of not kill-job of the present embodiment replace with pressure Oil/gas Well wellhead assembly, its structure as shown in Figure 2, its main feature is hydraulic structure, mainly comprise upper body (11), lower body (6), upper body (11), lower body (6) connect by guide pillar (8), the centre is penetrated with piston rod (7), and clip (9) is arranged on piston rod (7); Inlet (10) is arranged on described upper body (11), and there is hydraulic cylinder (12) upper end, and cap (15), cylinder cap (14) and suspension ring (13); Described lower body (6) gets, send head (2) to connect one-way back pressure valve (2) by piston rod (7), pipe nipple (5) and one-way back pressure valve; Described upper body (11), lower body (6) are by stop valve B(16), shutoff valve C (19) and be communicated with communicating pipe (17) and be provided with Pressure gauge (18).The upper stop valve A(4 in addition of lower body (6)).
The present embodiment operates like this: shown in 1, when changing valve, the embodiment instrument is placed in the upper end of oil (gas) well wellhead assembly main valve (1) by reference to the accompanying drawings.Also need be equipped with hand increasing pressure pump and high-pressure hose in enforcement, connect inlet (10).First the one-way back pressure valve being sent into head (3-2) before being arranged on instrument on well head is arranged on below instrument, and all sealing rings on one-way back pressure valve (2) are replaced with the new stop-leak compound of coating again, again one-way back pressure valve (2) is arranged on afterwards and sends into head (3-2) bottom.Above whole frock is arranged on No. 1 main valve of wellhead assembly (1) top (remarks No. 1 main valve this moment must be closed) together.After installing, open stop valve B(16) and shutoff valve C (19) and confirm to close stop valve A(4), open afterwards and close stop valve B(16 after a main valve (1) standard-sized sheet makes down-hole pressure and hydraulic cylinder (12) pressure balance) and shutoff valve C (19).Beginning is suppressed in the hydraulic cylinder (12) and piston rod (7) is depressed into one-way back pressure valve (2) top (is equipped with corresponding counterbalance valve screw thread) to well mouth hanger place, bottom and stops, turn piston rod this moment (7) screws in one-way back pressure valve (2) and hangs, until sealing ring screws in closed hole.Withdraw from the one-way back pressure valve and send into head (3-2), then begin slowly to lay down the oil pressure in hydraulic cylinder (12), piston rod this moment (7) is also answered rising, stops release until piston rod (7) withdraws from No. 1 main valve (1).Open stop valve B(16) and shutoff valve C (19) balance on downforce, open stop valve A(4) release, observing Pressure gauge (18) force value should slowly descend, and illustrate that counterbalance valve seals at this moment.Continue release until pressure is zero.Pull down No. 1 main valve and above integral body, change rapidly qualified new valve, and close this valve.Valve and the instrument of the part pulled down are unloaded respectively.The one-way back pressure valve is sent into head (3-2) be replaced with one-way back pressure valve taking-up head (3-1).Again instrument is arranged on No. 1 main valve of wellhead assembly.And confirm to close stop valve A(4), shutoff valve C (19) and stop valve B(16).Open No. 1 main valve (1) (standard-sized sheet).Beginning is suppressed in hydraulic cylinder (12).Piston rod (7) is depressed into one-way back pressure valve taking-up head (3-1) to be withstood on one-way back pressure valve (2), until nonreturn valve core is backed down.Beginning rotary-piston bar (7) screws out hanger with one-way back pressure valve (2).Begin to lay down the pressure on top until one-way back pressure valve (2) withdraws from the valve plate of No. 1 main valve, after close main valve No. 1.And upper pressure is all shed.Pull down instrument.
Claims (1)
1. the instrument of No. 1 main valve of a not kill-job replace with pressure Oil/gas Well wellhead assembly, is characterized in that described instrument is hydraulic structure, comprises upper and lower body, and upper and lower body connects by guide pillar, and the centre is penetrated with piston rod, and clip is arranged on piston rod; On described upper body, inlet is arranged, there are hydraulic cylinder and cap, cylinder cap and suspension ring in the upper end; Described lower body gets, send head to connect the one-way back pressure valve by piston rod, pipe nipple and one-way back pressure valve; Described upper and lower body is by being communicated with stop valve and communicating pipe and being provided with Pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100686187A CN103128530A (en) | 2013-03-05 | 2013-03-05 | Tool for replacing No.1 main valve of oil gas well mouth device in snubbing well under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100686187A CN103128530A (en) | 2013-03-05 | 2013-03-05 | Tool for replacing No.1 main valve of oil gas well mouth device in snubbing well under pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103128530A true CN103128530A (en) | 2013-06-05 |
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ID=48489323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100686187A Pending CN103128530A (en) | 2013-03-05 | 2013-03-05 | Tool for replacing No.1 main valve of oil gas well mouth device in snubbing well under pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103128530A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653169A (en) * | 2013-11-15 | 2015-05-27 | 中国石油天然气股份有限公司 | Simple metering device and process method for gas well wellhead |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5025857A (en) * | 1988-10-20 | 1991-06-25 | Mcleod Roderick D | Wellhead tubing and casing packer and installation and removal tool |
| CN201297146Y (en) * | 2008-12-03 | 2009-08-26 | 什邡慧丰采油机械有限责任公司 | Gate valve replacing tooling of well head device |
| CN201320747Y (en) * | 2008-12-19 | 2009-10-07 | 什邡慧丰采油机械有限责任公司 | Wellhead device pressed-on gate valve replacing tool |
| CN202417363U (en) * | 2011-12-20 | 2012-09-05 | 江苏宏泰石化机械有限公司 | Snubbing valve exchanging device |
| CN203156299U (en) * | 2013-03-05 | 2013-08-28 | 南京晨灿机械制造有限公司 | Tool for replacing No.1 main valve of oil and gas well head under pressure without closing well |
-
2013
- 2013-03-05 CN CN2013100686187A patent/CN103128530A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5025857A (en) * | 1988-10-20 | 1991-06-25 | Mcleod Roderick D | Wellhead tubing and casing packer and installation and removal tool |
| CN201297146Y (en) * | 2008-12-03 | 2009-08-26 | 什邡慧丰采油机械有限责任公司 | Gate valve replacing tooling of well head device |
| CN201320747Y (en) * | 2008-12-19 | 2009-10-07 | 什邡慧丰采油机械有限责任公司 | Wellhead device pressed-on gate valve replacing tool |
| CN202417363U (en) * | 2011-12-20 | 2012-09-05 | 江苏宏泰石化机械有限公司 | Snubbing valve exchanging device |
| CN203156299U (en) * | 2013-03-05 | 2013-08-28 | 南京晨灿机械制造有限公司 | Tool for replacing No.1 main valve of oil and gas well head under pressure without closing well |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653169A (en) * | 2013-11-15 | 2015-05-27 | 中国石油天然气股份有限公司 | Simple metering device and process method for gas well wellhead |
| CN104653169B (en) * | 2013-11-15 | 2017-10-17 | 中国石油天然气股份有限公司 | Simple metering device and process method for gas well wellhead |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130605 |