CN103993852A - Blowout prevention system for snubbing liquid seal gas well mouth of gas well - Google Patents
Blowout prevention system for snubbing liquid seal gas well mouth of gas well Download PDFInfo
- Publication number
- CN103993852A CN103993852A CN201410206014.9A CN201410206014A CN103993852A CN 103993852 A CN103993852 A CN 103993852A CN 201410206014 A CN201410206014 A CN 201410206014A CN 103993852 A CN103993852 A CN 103993852A
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- Prior art keywords
- gas well
- blowout preventer
- preventer
- well mouth
- slips
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- 239000007788 liquid Substances 0.000 title claims abstract description 9
- 230000002265 prevention Effects 0.000 title abstract description 7
- 230000003139 buffering effect Effects 0.000 claims description 7
- 210000002445 nipple Anatomy 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 12
- 238000010276 construction Methods 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 63
- 239000012530 fluid Substances 0.000 description 12
- 239000000084 colloidal system Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- Pipe Accessories (AREA)
Abstract
The invention relates to a blowout prevention system for a snubbing liquid seal gas well mouth of a gas well, which comprises a well mouth blowout prevention device and a tripping pipe column device; the wellhead blowout preventer comprises a lower ram blowout preventer group, a high-pressure shackle slip, an upper ram blowout preventer group, a hydraulic clamp, a spherical blowout preventer, a cylindrical blowout preventer and a fixing slip which are fixed at the wellhead of the gas well and sequentially connected from bottom to top; the spherical blowout preventer is connected with the cylindrical blowout preventer above the spherical blowout preventer through a section of first pipe body, and liquid is arranged in the first pipe body; the tripping pipe column device comprises a tripping oil cylinder assembly arranged above a gas well wellhead and a traveling rotary slip moving up and down along with a piston rod of the tripping oil cylinder assembly, wherein the traveling rotary slip and the fixed slip are coaxially arranged. The invention adopts the liquid gas seal and two-stage pressure reduction principle to perform the snubbing blowout prevention of the gas well, can meet the requirements of sealing performance, anti-corrosion performance and service life under the condition of ensuring the pressure safety plugging of the gas well, has low cost of the blowout prevention system, and can meet the snubbing construction requirement of the conventional gas well.
Description
Technical field
The invention relates to the blowout preventer equipment of oil field gas well, relate in particular to a kind of not kill-job of gas well fluid-tight gas well mouth spraying-preventing system.
Background technology
At present, gas well particularly shale gas well become one of main direction of Global Oil and Gas Resources.Gas well Operating Pressure requires the carrying out that ensures that construction can be safe under slave mode, oil-water well relatively, and gas well Operating Pressure has more risk, and the sealing performance to equipment and personnel's construction safety require higher.Gas well is with pressure while removing operation, requires leakage " zero tolerance ", and the Design and manufacture of gas well Operating Pressure equipment must meet large pre-degree, many redundancies, more strict to sealability, corrosion resistance and life requirements.
The structure of traditional not kill-job of oil-water well blowout preventer equipment is mainly by blowout preventer system with remove tubular column system and form, in the time that tubing string removes operation, normally combine by ram preventer group or the combination of flashboard and annular preventer realizes alternately passing through of box cupling and body, if directly use it for gas well operation, not only shackle operation meeting causes Leakage Gas, and the dry friction of tubing string and hermetic unit (the rubber position of tubing string and preventer contact surface) easily produces static, bring the potential safety hazard that gas moment fires; Dry friction also can aggravate wearing and tearing and the destruction of sealed colloid, greatly shortens the life-span of sealed colloid, thereby brings the problems such as safety and cost to gas well Operating Pressure.
Thus, the inventor relies on experience and the practice of being engaged in for many years relevant industries, proposes a kind of not kill-job of gas well fluid-tight gas well mouth spraying-preventing system, to overcome the defect of prior art.
Summary of the invention
The object of the present invention is to provide a kind of not kill-job of gas well fluid-tight gas well mouth spraying-preventing system, to reduce the electrostatic hazard that in gas well snubbing serving process, dry friction produces, reduce the colloid degree of wear, the life-span of improving complete spraying-preventing system.
Another object of the present invention is to provide a kind of not kill-job of gas well fluid-tight gas well mouth spraying-preventing system, by fluid column sealing gas and multi-step pressure reduction sealing, effective shutoff to well internal gas pressure while realizing with pressure lower tubular column of gas well, improves sealing life and structural anticorrosion erosion ability.
The object of the present invention is achieved like this, a kind of not kill-job of gas well fluid-tight gas well mouth spraying-preventing system, and this spraying-preventing system includes wellhead blowout preventer and removes tubular column unit; Described wellhead blowout preventer comprises the lower flashboard blowout preventer set, high pressure shackle slips, upper flashboard blowout preventer set, hydraulic pressure clip, spherical blow-out preventer, tubular preventer and the stationary slip that are fixed on gas well mouth and be linked in sequence from bottom to top; Described spherical blow-out preventer is connected by one section of first body with the tubular preventer of its top, in described this first body, is provided with liquid; The described tubular column unit that removes comprises the cylinder component that removes that is arranged on gas well mouth top, and the rotation slips that moves about moving up and down with the piston rod that removes cylinder component, described in move about rotation slips and stationary slip coaxially arrange.
In a preferred embodiments of the present invention, described the first body connects one provides the buffering accumulator of pressure for it.
In a preferred embodiments of the present invention, between described high pressure shackle slips and upper flashboard blowout preventer set, be provided with a pipe nipple.
In a preferred embodiments of the present invention, the described cylinder component that removes is arranged at gas well mouth top by a support, the described cylinder component that removes comprises the lower transverse beam that is fixed on support, the cylinder body of two parallel vertical settings is fixed on lower transverse beam, and the piston rod in two cylinder bodies upwards extends and is fixedly connected on a top rail; The described rotation slips that moves about is fixedly installed on the bottom of described top rail.
In a preferred embodiments of the present invention, described wellhead blowout preventer is connected and fixed by bolt, flange or box cupling and well head.
From the above mentioned, in not kill-job of gas well fluid-tight gas well mouth spraying-preventing system of the present invention, use a set of spherical blow-out preventer to realize primary seal by sealing one section of fluid column in the upper end of upper flashboard blowout preventer set, use a sleeve shaped preventer as depressurized system, and coordinate upper and lower ram preventer group to realize multi-sealed protection, the effective shutoff to gas in annular space in gas well while having realized lower tubular column thus; Described the first body connects one provides the buffering accumulator of pressure for it; The annular pressure of fluid column is realized by buffering accumulator, and fluid column can micro-ly leak, and to realize self-lubricating effect, and reduces colloid wearing and tearing, also can effectively eliminate electrostatic influence simultaneously; Aqueous chemical component can be resisted the corrosion to hermetic unit and metal body such as hydrogen sulfide gas; Adopt fluid-tight gas and second depressurized principle to carry out not kill-job of gas well blowout prevention, can be under ensureing the condition of gas well pressure security shutoff, take into account sealing performance, Corrosion Protection and life requirements, this spraying-preventing system cost is low, with strong points, the not kill-job construction requirement that can realize conventional gas well, is with a wide range of applications.
Brief description of the drawings
The following drawings is only intended to the present invention to schematically illustrate and explain, not delimit the scope of the invention.Wherein:
Fig. 1: be not kill-job of gas well fluid-tight gas well mouth spraying-preventing system structural representation of the present invention.
Detailed description of the invention
Understand for technical characterictic of the present invention, object and effect being had more clearly, now contrast brief description of the drawings the specific embodiment of the present invention.
As shown in Figure 1.The present invention proposes a kind of not kill-job of gas well fluid-tight gas well mouth spraying-preventing system 100, and this spraying-preventing system 100 includes wellhead blowout preventer and removes tubular column unit; Described wellhead blowout preventer comprises the lower flashboard blowout preventer set 1, high pressure shackle slips 2, upper flashboard blowout preventer set 3, hydraulic pressure clip 4, spherical blow-out preventer 5, tubular preventer 6 and the stationary slip 7 that are fixed on gas well mouth and be linked in sequence from bottom to top; Between described high pressure shackle slips 2 and upper flashboard blowout preventer set 3, be provided with a pipe nipple 21; Described spherical blow-out preventer 5 is connected by one section of first body 51 with the tubular preventer 6 of its top, is provided with the liquid of adjustable pressure in described this first body 51, and described liquid is at one section of fluid column of the interior formation of the first body 51; Described remove tubular column unit comprise be arranged on gas well mouth top remove cylinder component 9, and the rotation slips 8 that moves about moving up and down with the piston rod that removes cylinder component 9, described in the rotation slips 8 that moves about coaxially arrange with stationary slip 7.
From the above mentioned, in not kill-job of gas well fluid-tight gas well mouth spraying-preventing system of the present invention, use a set of spherical blow-out preventer 5 to realize primary seal by sealing one section of fluid column in the upper end of upper flashboard blowout preventer set 3, use a sleeve shaped preventer 6 as depressurized system, and coordinate upper and lower ram preventer group to realize multi-sealed protection, the effective shutoff to gas in annular space in gas well while having realized lower tubular column thus; Described the first body 51 connects one provides the buffering accumulator (not shown) of pressure for it; The annular pressure of fluid column is realized by buffering accumulator, and fluid column can micro-ly leak, and to realize self-lubricating effect, and reduces colloid wearing and tearing, also can effectively eliminate electrostatic influence simultaneously; Aqueous chemical component (for example: if aerogenesis is containing H in well can be resisted the corrosion to hermetic unit and metal body such as hydrogen sulfide gas
2s, H when gas passes through fluid column
2s dissolves in liquid, and the toxicity of final Exhaust Gas is reduced); Adopt fluid-tight gas and second depressurized principle to carry out not kill-job of gas well blowout prevention, can be under ensureing the condition of gas well pressure security shutoff, take into account sealing performance, Corrosion Protection and life requirements, this spraying-preventing system cost is low, with strong points, the not kill-job construction requirement that can realize conventional gas well, is with a wide range of applications.
Further, in the present embodiment, in the middle of upper and lower ram preventer group, be equipped with high pressure shackle slips 2, in the time of band press operation, the high pressure shackle slips 2 (it is prior art) adopting can complete in wellhead blowout preventer bottom upper, the shackle operation of tubing string, the rotation slips 8 that moves about clamps tubing string servo-actuated with it, realize cannot carry out stopping up in oil pipe and the special operation condition such as oil pipe side leakage under complete snubbing serving; Meanwhile, simplify work flow, improved operating efficiency.
Not kill-job of gas well fluid-tight gas well mouth spraying-preventing system of the present invention, it is simple in structure, installation and construction technology convenient and easy, cost is low, safe shutoff and efficient operation to down-hole air pressure can realize with pressure lower tubular column of gas well time.
In the present embodiment, upper flashboard blowout preventer set 3 seals flashboard by one and partly and one group of blind rams forms, and is mainly used in coordinating high pressure shackle slips 2 to realize shackle function with pressure, simultaneously can be at equipment middle part sealing annular space; Lower flashboard blowout preventer set 1 is sealed flashboard, blind rams and safety slip by one and partly and is formed, and it is mainly used in sealing pit shaft under fortuitous event, and no matter whether can guarantee has tubing string reliably to shunt in a well in well, fixes tubing string in well simultaneously.Described upper flashboard blowout preventer set 3 is all connected with high pressure shackle slips 2 by adapter flange with lower flashboard blowout preventer set 1.
The described cylinder component 9 that removes is arranged at gas well mouth top by a support (not shown), the described cylinder component 9 that removes comprises the lower transverse beam 91 that is fixed on support, the cylinder body 92 of two parallel vertical settings is fixed on lower transverse beam 91, and the piston rod 93 in two cylinder bodies 92 upwards extends and is fixedly connected on a top rail 94; The described rotation slips 8 that moves about is fixedly installed on the bottom of described top rail 94; In the time that two piston rods 93 move up and down, can drive the rotation slips 8 that moves about to move up and down by top rail 94, to remove corresponding oil pipe or tool string.
In the present embodiment, described wellhead blowout preventer is to be connected and fixed by bolt, flange or special box cupling and well head.
The flow chart that adopts spraying-preventing system of the present invention to trip out oil pipe column is:
(1) clamping moves about and rotates slips 8; (2) open stationary slip 7; (3) piston rod 93 removing in oil cylinder rises to top dead center position (extreme position protruding upward); (4) close stationary slip 7; (5) open the rotation slips 8 that moves about; (6) piston rod 93 removing in oil cylinder comes downwards to bottom dead center position (extreme position shrinking) downwards; (7) repeat above-mentioned steps (1)～(6), until all oil pipe trips out.This operation is that oil pipe is conducted oneself with dignity while being less than the interior upper top of pit shaft power, adopts slips to carry out operation.While being lowered to oil pipe, contrary with above operation.
The flow chart that adopts spraying-preventing system of the present invention to trip out underground tool string is: need the downhole tool of shackle with pressure to carry to more than the safety slip (being equivalent to back-up tong) in high pressure shackle slips, move about rotation slips, spherical blow-out preventer in closed condition, and all the other all slips and flashboard are all in open mode; The main card tile system of high pressure shackle slips is positioned at the lower end of stroke.(1) use after hydraulic lock safety slip, close reversal valve (this,, for the structure in high pressure shackle slips, is prior art), use and manually unclamp 0.5～1 circle, form empty card; (2) transfer tubing string, until pipe box cupling seat on safety slip, clamps safety slip (if borehole pressure is high, tubing string is lightweight, can clamp three flashboard slips as auxiliary) simultaneously; (3) clamp main slips; (4) drive main slips swivel shackle, until tubing round thread is totally released; (5) unclamp main slips; (6) upper lifting pipe post is to more than top blind rams; (7) close blind rams; (8) open relief valve (this,, for the structure in high pressure shackle slips, is prior art) and make the pressure release of upper pressure space; (9) unclamp spherical blow-out preventer and move about rotation slips; (10) take out tubing string and downhole tool; (11) be lowered to special reversible obstruction and drag for lance; (12) close spherical blow-out preventer and move about rotation slips; (13) open equalizing valve (this,, for the structure in high pressure shackle slips, is prior art) and make the supercharging of upper pressure space; (14) open blind rams; (15) special obstruction is dragged for to lance and insert and drag for the end tubing string of staying; (16) unclamp safety slip, above carry whole endowel.
The present invention has following beneficial effect compared with existing structure:
(1) the present invention uses a set of spherical blow-out preventer and a sleeve shaped preventer as primary seal and depressurized system in the upper end of upper flashboard blowout preventer set; realize primary seal by sealing one section of fluid column, and coordinate upper and lower ram preventer group to realize multi-sealed protection.
(2) annular pressure of fluid column of the present invention is realized by buffering accumulator, the micro-leakage of fluid column realizes self-lubricating effect, to reduce colloid wearing and tearing, can effectively eliminate electrostatic influence simultaneously, aqueous chemical component can be resisted the corrosion to hermetic unit and metal body such as hydrogen sulfide gas.
(3) the present invention is in the time of band press operation, the high pressure shackle slips adopting can complete in equipment bottom upper, the shackle operation of tubing string, the rotation slips clamping tubing string servo-actuated with it that moves about, realize cannot carry out stopping up in oil pipe and the special operation condition such as oil pipe side leakage under complete snubbing serving.
(4) simple, the installation of the present invention program and construction technology are convenient and easy, and cost is low, safe shutoff and efficient operation to down-hole air pressure can realize with pressure lower tubular column of gas well time.
The foregoing is only the schematic detailed description of the invention of the present invention, not in order to limit scope of the present invention.Any those skilled in the art, not departing from equivalent variations and the amendment done under the prerequisite of design of the present invention and principle, all should belong to the scope of protection of the invention.
Claims (5)
1. not kill-job of a gas well fluid-tight gas well mouth spraying-preventing system, this spraying-preventing system includes wellhead blowout preventer and removes tubular column unit; It is characterized in that: described wellhead blowout preventer comprises the lower flashboard blowout preventer set, high pressure shackle slips, upper flashboard blowout preventer set, hydraulic pressure clip, spherical blow-out preventer, tubular preventer and the stationary slip that are fixed on gas well mouth and be linked in sequence from bottom to top; Described spherical blow-out preventer is connected by one section of first body with the tubular preventer of its top, in described this first body, is provided with liquid; The described tubular column unit that removes comprises the cylinder component that removes that is arranged on gas well mouth top, and the rotation slips that moves about moving up and down with the piston rod that removes cylinder component, described in move about rotation slips and stationary slip coaxially arrange.
2. not kill-job of gas well fluid-tight gas well mouth spraying-preventing system as claimed in claim 1, is characterized in that: described the first body connects one provides the buffering accumulator of pressure for it.
3. not kill-job of gas well fluid-tight gas well mouth spraying-preventing system as claimed in claim 1, is characterized in that: between described high pressure shackle slips and upper flashboard blowout preventer set, be provided with a pipe nipple.
4. not kill-job of gas well fluid-tight gas well mouth spraying-preventing system as claimed in claim 1, it is characterized in that: described in remove cylinder component and be arranged at gas well mouth top by a support, the described cylinder component that removes comprises the lower transverse beam that is fixed on support, the cylinder body of two parallel vertical settings is fixed on lower transverse beam, and the piston rod in two cylinder bodies upwards extends and is fixedly connected on a top rail; The described rotation slips that moves about is fixedly installed on the bottom of described top rail.
5. not kill-job of gas well fluid-tight gas well mouth spraying-preventing system as claimed in claim 1, is characterized in that: described wellhead blowout preventer is connected and fixed by bolt, flange or box cupling and well head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410206014.9A CN103993852A (en) | 2014-05-15 | 2014-05-15 | Blowout prevention system for snubbing liquid seal gas well mouth of gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410206014.9A CN103993852A (en) | 2014-05-15 | 2014-05-15 | Blowout prevention system for snubbing liquid seal gas well mouth of gas well |
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| CN103993852A true CN103993852A (en) | 2014-08-20 |
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| CN201410206014.9A Pending CN103993852A (en) | 2014-05-15 | 2014-05-15 | Blowout prevention system for snubbing liquid seal gas well mouth of gas well |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481424A (en) * | 2014-11-07 | 2015-04-01 | 中国石油集团长城钻探工程有限公司 | Sectional cutting tubing string lifting process of no-killing operation |
| CN107655640A (en) * | 2017-10-09 | 2018-02-02 | 中石化四机石油机械有限公司 | A kind of Operating Pressure equipment sealing property method of testing and test device |
| CN107859499A (en) * | 2016-09-22 | 2018-03-30 | 中国石油天然气股份有限公司 | Working device is pressed in area |
| CN108425653A (en) * | 2018-03-26 | 2018-08-21 | 杨颖辉 | Gas well Operating Pressure wellhead assembly |
| CN108625822A (en) * | 2018-05-08 | 2018-10-09 | 海峰深水（天津）技术服务有限公司 | Multistage sequentially triggered emergency system capable of automatically shearing tubular column and sealing well |
| CN108979580A (en) * | 2018-07-03 | 2018-12-11 | 东北石油大学 | Oil-water well heavy repair task device with pressure |
| CN109441395A (en) * | 2019-01-08 | 2019-03-08 | 成都百胜野牛科技有限公司 | A kind of preventer and oil/gas well |
| CN111878016A (en) * | 2020-08-05 | 2020-11-03 | 四川圣诺油气工程技术服务有限公司 | Under-pressure back-off device for gas well and oil pipe lifting method |
| CN112483028A (en) * | 2020-12-11 | 2021-03-12 | 中国石油集团渤海钻探工程有限公司 | Quick control device for releasing clamping of under-pressure reversing in well |
| CN113187468A (en) * | 2021-04-01 | 2021-07-30 | 东北石油大学 | Wellhead sealing simulation device for high-pressure gas well |
| CN115247552A (en) * | 2021-04-27 | 2022-10-28 | 中国石油天然气集团有限公司 | Sealing method for underground coal gasification shaft |
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| CN200985765Y (en) * | 2006-12-11 | 2007-12-05 | 通化石油化工机械制造有限责任公司 | Grab type no-killing well repairing well head device |
| US20130206419A1 (en) * | 2010-07-12 | 2013-08-15 | Welltec A/S | Blowout preventer and launcher sytem |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481424A (en) * | 2014-11-07 | 2015-04-01 | 中国石油集团长城钻探工程有限公司 | Sectional cutting tubing string lifting process of no-killing operation |
| CN107859499B (en) * | 2016-09-22 | 2024-01-30 | 中国石油天然气股份有限公司 | Pressurized operation device |
| CN107859499A (en) * | 2016-09-22 | 2018-03-30 | 中国石油天然气股份有限公司 | Working device is pressed in area |
| CN107655640A (en) * | 2017-10-09 | 2018-02-02 | 中石化四机石油机械有限公司 | A kind of Operating Pressure equipment sealing property method of testing and test device |
| CN107655640B (en) * | 2017-10-09 | 2019-11-22 | 中石化四机石油机械有限公司 | A kind of Operating Pressure equipment sealing performance test method and test device |
| CN108425653A (en) * | 2018-03-26 | 2018-08-21 | 杨颖辉 | Gas well Operating Pressure wellhead assembly |
| CN108625822A (en) * | 2018-05-08 | 2018-10-09 | 海峰深水（天津）技术服务有限公司 | Multistage sequentially triggered emergency system capable of automatically shearing tubular column and sealing well |
| CN108625822B (en) * | 2018-05-08 | 2024-04-02 | 海一峰深水（天津）技术服务有限公司 | Multistage sequential triggering emergency system capable of automatically shearing tubular column and sealing well hole |
| CN108979580A (en) * | 2018-07-03 | 2018-12-11 | 东北石油大学 | Oil-water well heavy repair task device with pressure |
| CN109441395A (en) * | 2019-01-08 | 2019-03-08 | 成都百胜野牛科技有限公司 | A kind of preventer and oil/gas well |
| CN111878016A (en) * | 2020-08-05 | 2020-11-03 | 四川圣诺油气工程技术服务有限公司 | Under-pressure back-off device for gas well and oil pipe lifting method |
| CN112483028A (en) * | 2020-12-11 | 2021-03-12 | 中国石油集团渤海钻探工程有限公司 | Quick control device for releasing clamping of under-pressure reversing in well |
| CN113187468A (en) * | 2021-04-01 | 2021-07-30 | 东北石油大学 | Wellhead sealing simulation device for high-pressure gas well |
| CN113187468B (en) * | 2021-04-01 | 2022-05-31 | 东北石油大学 | Wellhead sealing simulation device for high-pressure gas well |
| CN115247552A (en) * | 2021-04-27 | 2022-10-28 | 中国石油天然气集团有限公司 | Sealing method for underground coal gasification shaft |
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Application publication date: 20140820 |