CN104775764A - Under-pressure operating device for low-pressure gas well - Google Patents
Under-pressure operating device for low-pressure gas well Download PDFInfo
- Publication number
- CN104775764A CN104775764A CN201510198795.6A CN201510198795A CN104775764A CN 104775764 A CN104775764 A CN 104775764A CN 201510198795 A CN201510198795 A CN 201510198795A CN 104775764 A CN104775764 A CN 104775764A
- Authority
- CN
- China
- Prior art keywords
- pressure
- low
- gas well
- under
- operation device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 239000009096 changqing Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
Abstract
The invention belongs to the technical field of under-pressure well repairing in a gas field and in particular relates to an under-pressure operating device for a low-pressure gas well. The under-pressure operating device is composed of an upper work platform, a movable ejection preventing clip, a fixed clip, a hydraulic cylinder, an annular preventer and a lower flange plate which are sequentially connected through bolts from top to bottom. According to the under-pressure operating device for the low-pressure gas well, the technical problems that the existing large equipment is long in moving and installing period and higher in operating cost and cannot meet the low-cost high-efficiency development requirement of the three-low gas pools are solved.
Description
Technical field
The invention belongs to well workover technology field with pressure, gas field, be specifically related to a kind of low-pressure gas well operation device under pressure.
Background technology
Changqing oilfields is the large oil and gas fields that an oil gas develops simultaneously, " green " constructure scheme that Operating Pressure is gas well well workover, reservoir technical measures provide a kind of safe and efficient environmental protection.Up to now, Changqing Gas Fields is secondary more than 50 wells by Operating Pressure well workover every year, and avoid the problem that gas well production declining that conventional Well Killing operation causes even stops production, economic benefit is good.
Changqing Gas Fields is also typical case's " three is low " gas reservoir, and reservoir pressure, gas production are all less, by the mode cycle of successively gas testing, combination producing is long, development benefit is poor.Within 2014, start the exploitation of test casing Valve with sliding bush stereoscopic multi-layer system, under adopting band pressure device after pressure break completes, enter small-size diameter string discharge opeing completion.At present S-9, S 225K Operating Pressure machine be main equipment, relocation equipment, installation period are long, and operating cost is higher, can not meet the demand of low cost, Efficient Development, are unfavorable for expansion Operating Pressure range of application.Need a kind of implement small-sized with pressure meeting lower pressure of R & D design, reduce construction period and operating cost.
Summary of the invention
The object of the invention is to overcome the resettlement of existing main equipment, installation period is long, operating cost is higher, can not meet the technical barrier of " three is low " gas reservoir low cost, Efficient Development.
For this reason, the invention provides a kind of low-pressure gas well operation device under pressure, be bolted successively from top to bottom formed by upper working platform, travelling anti-jack slips, stationary slip, fluid cylinder, annular preventer, lower flange.
The whole height of described operation device under pressure is 2.0-2.2m.
Described annular preventer static seal pressure is 21MPa, and movable sealing pressure is 14MPa.
The lifting force of described fluid cylinder is 30T, and downforce is 15T, and the lift height of fluid cylinder is 1.0-1.5m.
The invention has the beneficial effects as follows: this low-pressure gas well operation device under pressure provided by the invention, by arranging annular preventer, can space between Sealed casing pipe and tube inner wall, ensure that and seal rountrip reliably; Stationary slip has anti-top and anti-drop function, can ensure that in fluid cylinder running, the reliable of tubing string is fixed; Traveling slip has anti-top function, tubing string can be met in well, have press-in under pressure condition or blowout prevention, solve the resettlement of existing main equipment, installation period is long, operating cost is higher, can not meet the technical barrier of " three is low " gas reservoir low cost, Efficient Development.
Be described in further details below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, upper working platform; 2, travelling anti-jack slips; 3, stationary slip; 4, fluid cylinder; 5, annular preventer; 6, lower flange.
Detailed description of the invention
Present embodiments provide a kind of low-pressure gas well operation device under pressure as shown in Figure 1, be bolted successively from top to bottom formed by upper working platform 1, travelling anti-jack slips 2, stationary slip 3, fluid cylinder 4, annular preventer 5, lower flange 6.
Wherein, conveniently elevator is placed when upper working platform 1 for entering or having tripped out under single oil pipe; Travelling anti-jack slips 2 can clamp fixing oil pipe, has anti-top function, and can meet tubing string has press-in under pressure condition or tubing string blowout prevention in well; Stationary slip 3 has anti-top and anti-drop function, can ensure that in fluid cylinder 4 running, the reliable of tubing string is fixed; Fluid cylinder 4 controls to pump by hydraulic oil, enters or trip out under realizing oil pipe; Annular preventer 5 seals the annular space of oil pipe and sleeve pipe, prevents well head gas leak, ensure that and seals rountrip reliably; Lower flange 6 can be bolted with well head four-way.
Apparatus of the present invention relate to well workover technology field with pressure, gas field, are the important underground work devices of gas field well workover, are applied to gas well well workover with pressure and play lower tubular column operation.
The application process of apparatus of the present invention is:
1) well head four-way is connected with bolt with the lower flange 6 of device, fixing reliable, and debug fluid pressure line, switch is reliable;
2) after the oil pipe working rig with blanking plug being sling, lifting fluid cylinder 4 to fluid cylinder 4 stroke top dead center, close traveling slip clamping oil pipe, operation fluid cylinder 4 is descending;
3) oil pipe is by after annular preventer 5, closes annular preventer 5, the annular space between sealing oil pipe and sleeve pipe;
4) slowly transfer to fluid cylinder 4 after bottom dead center, close stationary slip 3 hold oil pipe tightly;
5) operate fluid cylinder 4 and go upward to after top dead center, close traveling slip, open stationary slip 3;
6) enter oil pipe under, repeat step 5), until lower complete oil pipe;
7) elevator is placed in upper working platform 1 place, makes up a joint; Repeat step 6, in completed well, under whole oil pipe, enter work.
In the present embodiment, operation device under pressure is with bolts, with for convenience detach and maintenance; The whole height of operation device under pressure is 2.0-2.2m, and annular preventer 5 static seal pressure is 21MPa, and movable sealing pressure is 14MPa; The lifting force of fluid cylinder 4 is 30T, and downforce is 15T, and the lift height of fluid cylinder 4 is 1.0-1.5m.
In sum, this low-pressure gas well operation device under pressure provided by the invention, by arranging annular preventer 5, can space between Sealed casing pipe and tube inner wall, ensure that and seal rountrip reliably; Stationary slip 3 has anti-top and anti-drop function, can ensure that in fluid cylinder 4 running, the reliable of tubing string is fixed; Traveling slip has anti-top function, tubing string can be met in well, have press-in under pressure condition or blowout prevention, the whole height of operation device under pressure is 2.0-2.2m, solve the resettlement of existing main equipment, installation period is long, operating cost is higher, can not meet the technical barrier of " three is low " gas reservoir low cost, Efficient Development.
The present embodiment does not have specifically described part all to belong to common practise and the known technology of the art, describes in detail no longer one by one herein.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (4)
1. a low-pressure gas well operation device under pressure, is characterized in that: be bolted successively from top to bottom formed by upper working platform (1), travelling anti-jack slips (2), stationary slip (3), fluid cylinder (4), annular preventer (5), lower flange (6).
2. a kind of low-pressure gas well operation device under pressure according to claim 1, is characterized in that: the whole height of described operation device under pressure is 2.0-2.2m.
3. a kind of low-pressure gas well operation device under pressure according to claim 1, it is characterized in that: described annular preventer (5) static seal pressure is 21MPa, movable sealing pressure is 14MPa.
4. a kind of low-pressure gas well operation device under pressure according to claim 1, is characterized in that: the lifting force of described fluid cylinder (4) is 30T, and downforce is 15T, and the lift height of fluid cylinder (4) is 1.0-1.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510198795.6A CN104775764A (en) | 2015-04-24 | 2015-04-24 | Under-pressure operating device for low-pressure gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510198795.6A CN104775764A (en) | 2015-04-24 | 2015-04-24 | Under-pressure operating device for low-pressure gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104775764A true CN104775764A (en) | 2015-07-15 |
Family
ID=53617488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510198795.6A Pending CN104775764A (en) | 2015-04-24 | 2015-04-24 | Under-pressure operating device for low-pressure gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104775764A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796644A (en) * | 2017-10-19 | 2018-03-13 | 中石化四机石油机械有限公司 | A kind of motor-driven load experimental rig of oil gas field Operating Pressure and test method |
| CN117404040A (en) * | 2023-12-13 | 2024-01-16 | 中国石油集团川庆钻探工程有限公司 | Fracturing wellhead leakage plugging device and plugging method |
| CN118008170A (en) * | 2024-04-10 | 2024-05-10 | 西安宇星石油机械新技术开发有限公司 | Top anti-falling chuck is prevented in combined type hydraulic gear drive |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5590867A (en) * | 1995-05-12 | 1997-01-07 | Drexel Oil Field Services, Inc. | Blowout preventer for coiled tubing |
| CN101519953A (en) * | 2009-04-09 | 2009-09-02 | 胜利油田供应方圆石油装备有限责任公司 | Hydraulic slip and hydraulic blowout preventer combined oil water well pressured equipment |
| CN204646137U (en) * | 2015-04-24 | 2015-09-16 | 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 | A kind of low-pressure gas well operation device under pressure |
-
2015
- 2015-04-24 CN CN201510198795.6A patent/CN104775764A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5590867A (en) * | 1995-05-12 | 1997-01-07 | Drexel Oil Field Services, Inc. | Blowout preventer for coiled tubing |
| CN101519953A (en) * | 2009-04-09 | 2009-09-02 | 胜利油田供应方圆石油装备有限责任公司 | Hydraulic slip and hydraulic blowout preventer combined oil water well pressured equipment |
| CN204646137U (en) * | 2015-04-24 | 2015-09-16 | 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 | A kind of low-pressure gas well operation device under pressure |
Non-Patent Citations (1)
| Title |
|---|
| 张丰功等: "BYJ18－21/35带压作业机的研制", 《石油机械》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796644A (en) * | 2017-10-19 | 2018-03-13 | 中石化四机石油机械有限公司 | A kind of motor-driven load experimental rig of oil gas field Operating Pressure and test method |
| CN117404040A (en) * | 2023-12-13 | 2024-01-16 | 中国石油集团川庆钻探工程有限公司 | Fracturing wellhead leakage plugging device and plugging method |
| CN117404040B (en) * | 2023-12-13 | 2024-03-08 | 中国石油集团川庆钻探工程有限公司 | Fracturing wellhead leakage plugging device and plugging method |
| CN118008170A (en) * | 2024-04-10 | 2024-05-10 | 西安宇星石油机械新技术开发有限公司 | Top anti-falling chuck is prevented in combined type hydraulic gear drive |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10081999B2 (en) | Downhole occluder, pressurized sucker rod and operation technique to repair oil pipes | |
| CN204646137U (en) | A kind of low-pressure gas well operation device under pressure | |
| CN107859499B (en) | Pressurized operation device | |
| CN104389544A (en) | Reducing dual tubing oil recovery wellhead casing head | |
| CN110630204B (en) | Under-pressure operation equipment for gas drive injection well completion and under-pressure operation method thereof | |
| CN104343400A (en) | Snubbing controllable workover operation equipment and operation method thereof | |
| CN108019178B (en) | Construction method for plugging production pipe column under pressure in pipe | |
| CN103993852A (en) | Blowout prevention system for snubbing liquid seal gas well mouth of gas well | |
| CN101748984B (en) | Automatically controlled well blowout preventer mounted in drilling column | |
| US11047199B2 (en) | Hydraulic workover unit for live well workover | |
| CN104863538B (en) | Band pressure blocks setting blowout preventer | |
| CN104775764A (en) | Under-pressure operating device for low-pressure gas well | |
| CN103790542B (en) | Coiled tubing suspension sealing device for testing under high-temperature belt pressure and using method | |
| CN205605156U (en) | Workover device is pressed in oil gas field area | |
| CN205135508U (en) | Sealing device of oil pumping unit | |
| CN203925394U (en) | Blowout prevention system for snubbing liquid seal gas well mouth of gas well | |
| CN105239953A (en) | Blowout-preventive operation device for lifting and lowering rod pipe under pressure | |
| CN203161116U (en) | Well killing free under-pressure working device | |
| CN201738915U (en) | Sealing and suppressing device of well sealing device for oil field | |
| CN201627562U (en) | Switch plugging blowout control device in wellhead | |
| CN202832484U (en) | Well mouth pressure testing device | |
| CN203420652U (en) | Pressure-balanced and controllable workover treatment device | |
| CN202249899U (en) | Pressure isolation device for wellhead Christmas tree | |
| CN204212732U (en) | A kind of reducing formula dual tubing oil recovery casing head of well head | |
| CN201902190U (en) | Blowout prevention pressure testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150715 |
|
| RJ01 | Rejection of invention patent application after publication |