CN105350932A - Gas well under-pressure induced-flow plug-removal draining technique - Google Patents
Gas well under-pressure induced-flow plug-removal draining technique Download PDFInfo
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- CN105350932A CN105350932A CN201510733145.7A CN201510733145A CN105350932A CN 105350932 A CN105350932 A CN 105350932A CN 201510733145 A CN201510733145 A CN 201510733145A CN 105350932 A CN105350932 A CN 105350932A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005516 engineering process Methods 0.000 claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 35
- 238000005086 pumping Methods 0.000 claims description 34
- 239000012530 fluid Substances 0.000 claims description 18
- 238000012856 packing Methods 0.000 claims description 18
- 241000191291 Abies alba Species 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000153 supplemental effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 206010011906 Death Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/03—Freeing by flushing
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The present invention relates to the technical field of gas production of gas wells, and especially relates to a gas well under-pressure induced-flow plug-removal draining technique. The technique comprises an under-pressure swabbing drainage construction procedure which comprises equipment installation. The equipment installation comprises site layout, vehicle arrangement and derrick erection; and connection of wellhead blowout preventers on the ground, an adapter flange, a hydraulic-drive single-ram blowout preventer, a hydraulic-drive three-ram blowout preventer, a pressure release tee joint and a blowout preventing pipe being connected in turn, the hydraulic-drive single-ram blowout preventer and the hydraulic-drive three-ram blowout preventer forming a blowout preventer group, and the hydraulic-drive three-ram blowout preventer being composed of a shear ram preventer, a blind ram preventer and a semi-sealed ram preventer. The swabbing draining technology and the under-pressure operation technology are organically combined, long-range control and operation of wellhead pressure during under-pressure swabbing operation is realized, operating risks are lowered, the technique is safe and reliable, requirements for gas well under-pressure swabbing draining construction operation are met, and technical blanks in national gas well under-pressure swabbing induced-flow plug-removal draining techniques are filled.
Description
Technical field:
The present invention relates to gas well production gas technology field, particularly a kind of gas well induced flow de-plugging with pressure fluid-discharge technology.
Background technology:
In gas well gas production manufacturing process, production capacity can be caused to reduce gradually because hydrops in well makes gas-bearing formation water logging block, open or end-of-life state between being even in, have a strong impact on gas well output.And gas well at present conventional comprise operation induced flow, de-plugging pressure after etc. the method for discharge opeing mainly contain coiled tubing, gas lift liquid drainage etc., long construction period, costly, and DeGrain sometimes.It is most economical effective method that gas well implements swab the well in de-plugging discharge opeing with pressure by flow string.
Current pumping discharge opeing technology is limited to oil-water well and asks product induced flow or drag in the techniques such as oil volume increase, although have developed the ancillary facility such as swab damper, liquid controlled blowout preventing box in the safe pumping technology of gas well, but because blowout preventer equipment and technology operation are relatively simple, still be limited to low-voltage and low-yield poor efficiency hydrops gas well discharge opeing construction, well head is relatively with no pressure and strata pressure is relatively little.
All the time, group company forbids strictly gas well swabbing induced flow, do not reach gas well because of the hermetic seal ability to swabbing operation wire rope, well head air pressure blowout prevention control ability and technology exactly and take out the requirements such as well control emergency disposal ability when the rear well head pressure of spray raises suddenly, once well head is out of control will cause serious consequence.
Band operation technique is ripe already, and the construction of current gas well Operating Pressure reaches more than 100Mpa to the blowout prevention control ability of well head air pressure, but its well control technique also effectively could not to be applied to gas well pumping with pressure construction technology technical.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of gas well induced flow de-plugging with pressure fluid-discharge technology, pumping discharge opeing technology and Operating Pressure technology organically combine by this technique, achieve the remote control operation of swabbing operation with pressure construction to well head pressure, reduce operational risk, technology is safe and reliable, meet the requirement of oil gas field gas well pumping discharge opeing with pressure construction operation, fill up domestic gas well swab the well in de-plugging with pressure fluid-discharge technology technological gap.Overcome the deficiency that existing gas well cannot realize swab the well in de-plugging discharge opeing with pressure.
The technical solution used in the present invention is: a kind of gas well induced flow de-plugging with pressure fluid-discharge technology, and this processing step is as follows:
One, pumping discharge opeing construction sequence with pressure:
I erection equipment
1. site layout project, vehicle spot cars, erection of derrick;
2. ground connect wellhead blowout preventer: adapter flange, the single ram type perventer that surges, the triple ram preventer that surges, bleed off pressure threeway, lubricator connects in turn, the single ram type perventer that surges forms blowout preventer set with the triple ram preventer that surges, and the triple ram preventer that surges is made up of shear ram preventer, blind rams preventer and half envelope ram preventer;
3. installation check wire rope sealer, card rope socket, installs well head constructing operation platform;
4. remove former christmas tree top thread flange, install wellhead blowout preventor group and lubricator, connect blowout preventer set liquid controling pipe line, carry out system debug;
5. enter in lubricator under waterpower swab being connected rope socket, lubricator is connected with wire rope sealer;
6. in well head christmas tree side, liquid-operated flat valve is installed, liquid-operated flat valve connects gas-liquid separator, gas-liquid separator discharge opeing port closing, gas-liquid separator air exit connects choke manifold, choke manifold is connected with sleeve pipe by choke valve, choke manifold installs pressure limiting valve, and pressure limiting valve connects emptying igniting pipeline;
II hydraulic system debugging
1. the reversal valve in fluid path between swabbing operation car and well head tele-control system is switched to control system voltage supply position;
2. hydraulic system is suppressed to 21Mpa, sets blowout preventer set, wire rope sealer and greasing pump work pressure by pressure regulator valve;
3. surge single ram type perventer, shear ram preventer, blind rams preventer, half envelope ram preventer and liquid-operated flat valve of switch debugging is working properly;
4. debug hydraulic work system normal after, first close the pressure stop valve controlled between shear ram preventer and accumulator in fluid path, then check that whether each pressure meter of operating desk normal, whether operating valve is in meta;
5. in pumping process, hydraulic pump is the voltage supply of well head tele-control system always;
III pumping discharge opeing with pressure
Before every mouthful of well pumping discharge opeing first, necessary first siphunculus, scraping, verify level, tubing string situation, carries out pumping discharge opeing construction after adjustment control system works is normal;
1. open well head christmas tree and the gate valve of liquid-operated flat valve side is installed, make well head and liquid-operated flat valve, gas-liquid separator, choke manifold, sleeve pipe UNICOM;
2. the wellhead sluice valve on blind rams preventer and christmas tree center line is opened;
3. descend waterpower swab, speeds control is within 6m/s; When swab enters below liquid level, lowering velocity controls within 2m/s; In φ 73 oil pipe, maximum submergence must not more than 150m; In φ 89 oil pipe, maximum submergence must not more than 100m;
4. propose pumping discharge opeing on: under waterpower swab behind precalculated position, operation is carried, speeds control at 4m/s, swab is carried apart from well head 100m time, within upward strain speed reduces to 2m/s;
5. well head hilllock is responsible for observing fluidity, pressure and wire rope mark, the hand operation of commander's compounding practice; Operator is noted observing weight indicator, referring to the data variation deeply felt, and has recorded level, submergence, discharge opeing liquid measure supplemental characteristic;
6., after swab enters lubricator by wellhead blowout preventor group, close blind rams preventer and observe;
7. according to fluid column situation in well, need more than 30min be observed, secondary pumping discharge opeing can be carried out;
8. the fluid reservoir of gas-liquid separator enters the recovery of receipts flow container by explosion-proof oil pump after reaching and reclaiming liquid measure;
IV construction ending
1. after pumping discharge opeing terminates, waterpower swab is carried in lubricator, close well head control block valve;
2. after lubricator pressure release, wire rope sealer of dismantling, upper belt goes out waterpower swab, takes off maintenance process;
3. discharge opeing outlet gate valve and other gate valve of christmas tree is closed;
4., after hydraulic control system pressure release, the whole hydraulic control lines of wellhead blowout preventer is removed;
5. remove whole wellhead blowout preventer, recover well head original appearance;
6. remove and receive tank truck and ground gas-liquid separation device connecting line, tank car leaves well site;
7. remove well-mouth operating floor, safe folding and unfolding derrick, instrument and material are regained, and place is cleaned;
Two, well head pressure control program
I normal construction well head pressure controls
1. wire rope sealer packing tightens self-sealing borehole pressure;
2. stop-leak compound is noted: in pumping discharge opeing process, swab drives liquid to time up, well head pressure raises, and when leakage appears in wire rope sealer, first can promote greasing pump continuously to greasing in wire rope sealer until sealer packing has stop-leak compound to overflow by long-range hydraulic control platform;
3. compress packing: well head pressure continues to raise, and when greasing can not make wire rope sealer seal, promotes wire rope sealer packing pilot operated valve device continuously by long-range hydraulic control platform, compression packing is to wellhead sealing;
4. stop-leak compound and compression packing sustainable blocked operation is noted, if also blow-by, adjustable wire rope sealer and greasing pump fluid control pressure is the highest sets 10.5Mpa;
5. close half envelope: the greasing of wire rope sealer, also blow-by when being compressed to maximum pressure, close and partly seal ram preventer, make it collaborative with wire rope sealer and seal;
II promptly shears closing well program
When discovery well head pressure can not seal, and now waterpower swab cannot have been carried safely in the above lubricator of well head, can start urgent shearing closing well program:
1. stop rope operation immediately, drum brake is killed fixing;
2. close the single ram type perventer that surges, operating control handle continuous pressure 2-3 time, guarantees that S type slip flashboard is held tightly;
3. open the pressure stop valve controlled between shear ram preventer and accumulator in fluid path, then operating control handle closes shear ram preventer, cut off wire rope simultaneously shear ram preventer close shut-in well;
4. go up rope head and close blind rams preventer;
5. after the emergency cut-off of wellhead blowout preventor group, then close outlet liquid-operated flat valve, observe well head pressure;
Treatment procedures after III urgent shearing closing well
1. need to observe more than 30min after urgent closing well, well head without after pressure change, then carries out well head disposal;
If 2. well head has pressure to bleed off pressure procedure operation by well head to bleed off pressure, be zero to well head pressure;
3. surge triple ram preventer and top wellhead blowout preventer thereof is removed;
4. single ram type perventer top of surging is exposed fag end and is docked with swabbing operation car steel wire rope head and stuckly block jail;
5. operate cylinder rope, until wire rope stressed >=well in after waterpower swab and wire rope weight, operation pilot operated valve device opens the single ram type perventer that surges, and proposes wire rope and waterpower swab in well, closes well head christmas tree gate valve.
The invention has the beneficial effects as follows: pumping discharge opeing technology and Operating Pressure technology organically combine by the present invention, achieve the remote control operation of swabbing operation with pressure construction to well head pressure, reduce operational risk, technology is safe and reliable, meet the requirement of oil gas field gas well pumping discharge opeing with pressure construction operation, fill up domestic gas well swab the well in de-plugging with pressure fluid-discharge technology technological gap.
Accompanying drawing illustrates:
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Fig. 1 is wellhead blowout preventer structural representation.
Fig. 2 is discharge opeing control device of exit pressure schematic diagram.
Detailed description of the invention:
A kind of gas well induced flow de-plugging with pressure fluid-discharge technology, this processing step is as follows:
One, pumping discharge opeing construction sequence with pressure:
I erection equipment
1. site layout project, vehicle spot cars, erection of derrick;
2. ground connect wellhead blowout preventer: adapter flange 1, the single ram type perventer 2 that surges, the triple ram preventer 3 that surges, bleed off pressure threeway 4, lubricator 5 connects in turn, the single ram type perventer 2 that surges forms blowout preventer set with the triple ram preventer 3 that surges, the triple ram preventer 3 that surges is made up of shear ram preventer, blind rams preventer and half envelope ram preventer, as shown in Figure 1;
3. installation check wire rope sealer 6, card rope socket, installs well head constructing operation platform;
4. remove former christmas tree top thread flange, install wellhead blowout preventor group and lubricator 5, connect blowout preventer set liquid controling pipe line, carry out system debug;
5. enter in lubricator 5 under waterpower swab being connected rope socket, lubricator 5 is connected with wire rope sealer 6;
6. in well head christmas tree 8 side, liquid-operated flat valve 9 is installed, liquid-operated flat valve 9 connects gas-liquid separator 12, gas-liquid separator 12 discharge opeing port closing, gas-liquid separator 12 air exit connects choke manifold 15, choke manifold 15 is connected with sleeve pipe 17 by choke valve 16, choke manifold 15 installs pressure limiting valve 14, and pressure limiting valve 14 connects emptying igniting pipeline 13, as shown in Figure 2;
II hydraulic system debugging
1. the reversal valve in fluid path between swabbing operation car 7 and well head tele-control system is switched to control system voltage supply position;
2. hydraulic system is suppressed to 21Mpa, sets blowout preventer set, wire rope sealer 6 and greasing pump work pressure by pressure regulator valve;
3. surge single ram type perventer 2, shear ram preventer, blind rams preventer, half envelope ram preventer and liquid-operated flat valve 9 of switch debugging is working properly;
4. debug hydraulic work system normal after, first close the pressure stop valve controlled between shear ram preventer and accumulator in fluid path, then check that whether each pressure meter of operating desk normal, whether operating valve is in meta;
5. in pumping process, hydraulic pump is the voltage supply of well head tele-control system always;
III pumping discharge opeing with pressure
Before every mouthful of well pumping discharge opeing first, necessary first siphunculus, scraping, verify level, tubing string situation, carries out pumping discharge opeing construction after adjustment control system works is normal;
1. open the gate valve that well head christmas tree 8 installs liquid-operated flat valve 9 side, make well head and liquid-operated flat valve 9, gas-liquid separator 12, choke manifold 15, sleeve pipe 17 UNICOM;
2. the wellhead sluice valve on blind rams preventer and christmas tree center line is opened;
3. descend waterpower swab, speeds control is within 6m/s; When swab enters below liquid level, lowering velocity controls within 2m/s; In φ 73 oil pipe, maximum submergence must not more than 150m; In φ 89 oil pipe, maximum submergence must not more than 100m;
4. propose pumping discharge opeing on: under waterpower swab behind precalculated position, operation is carried, speeds control at 4m/s, swab is carried apart from well head 100m time, within upward strain speed reduces to 2m/s;
5. well head hilllock is responsible for observing fluidity, pressure and wire rope mark, the hand operation of commander's compounding practice; Operator is noted observing weight indicator, referring to the data variation deeply felt, and has recorded level, submergence, discharge opeing liquid measure supplemental characteristic;
6., after swab enters lubricator 5 by wellhead blowout preventor group, close blind rams preventer and observe;
7. according to fluid column situation in well, need more than 30min be observed, secondary pumping discharge opeing can be carried out;
8. enter receipts flow container 10 by explosion-proof oil pump 11 after the fluid reservoir of gas-liquid separator 12 reaches recovery liquid measure to reclaim;
IV construction ending
1. after pumping discharge opeing terminates, waterpower swab is carried in lubricator 5, close well head control block valve;
2. after lubricator 5 pressure release, wire rope sealer 6 of dismantling, upper belt goes out waterpower swab, takes off maintenance process;
3. discharge opeing outlet gate valve and other gate valve of christmas tree is closed;
4., after hydraulic control system pressure release, the whole hydraulic control lines of wellhead blowout preventer is removed;
5. remove whole wellhead blowout preventer, recover well head original appearance;
6. remove and receive tank truck and ground gas-liquid separation device connecting line, tank car leaves well site;
7. remove well-mouth operating floor, safe folding and unfolding derrick, instrument and material are regained, and place is cleaned;
Two, well head pressure control program
I normal construction well head pressure controls
1. wire rope sealer 6 packing tightens self-sealing borehole pressure;
2. stop-leak compound is noted: in pumping discharge opeing process, swab drives liquid to time up, well head pressure raises, and when leakage appears in wire rope sealer 6, first can promote greasing pump continuously to greasing in wire rope sealer 6 until sealer packing has stop-leak compound to overflow by long-range hydraulic control platform;
3. compress packing: well head pressure continues to raise, and when greasing can not make wire rope sealer 6 seal, promotes wire rope sealer 6 packing pilot operated valve device continuously by long-range hydraulic control platform, compression packing is to wellhead sealing;
4. note stop-leak compound and the sustainable blocked operation of compression packing, if also blow-by, adjustable wire rope sealer 6 sets 10.5Mpa with greasing pump fluid control pressure is the highest;
5. close half envelope: wire rope sealer 6 greasing, also blow-by when being compressed to maximum pressure, close and partly seal ram preventer, make it to seal with wire rope sealer 6 is collaborative;
II promptly shears closing well program
When discovery well head pressure can not seal, and now waterpower swab cannot have been carried safely in the above lubricator 5 of well head, can start urgent shearing closing well program:
1. stop rope operation immediately, drum brake is killed fixing;
2. close the single ram type perventer 2 that surges, operating control handle continuous pressure 2-3 time, guarantees that S type slip flashboard is held tightly;
3. open the pressure stop valve controlled between shear ram preventer and accumulator in fluid path, then operating control handle closes shear ram preventer, cut off wire rope simultaneously shear ram preventer close shut-in well;
4. go up rope head and close blind rams preventer;
5. after the emergency cut-off of wellhead blowout preventor group, then close outlet liquid-operated flat valve 9, observe well head pressure;
Treatment procedures after III urgent shearing closing well
1. need to observe more than 30min after urgent closing well, well head without after pressure change, then carries out well head disposal;
If 2. well head has pressure to bleed off pressure procedure operation by well head to bleed off pressure, be zero to well head pressure;
3. surge triple ram preventer 3 and top wellhead blowout preventer thereof is removed;
4. single ram type perventer 2 top of surging is exposed fag end and is docked with swabbing operation car 7 steel wire rope head and stuckly block jail;
5. operate cylinder rope, until wire rope stressed >=well in after waterpower swab and wire rope weight, operation pilot operated valve device opens the single ram type perventer 2 that surges, and proposes wire rope and waterpower swab in well, closes well head christmas tree 8 gate valve.
Be understandable that, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.
Claims (1)
1. a gas well induced flow de-plugging with pressure fluid-discharge technology, is characterized in that: this processing step is as follows:
One, pumping discharge opeing construction sequence with pressure:
I erection equipment
1. site layout project, vehicle spot cars, erection of derrick;
2. ground connect wellhead blowout preventer: adapter flange (1), the single ram type perventer that surges (2), the triple ram preventer that surges (3), bleed off pressure threeway (4), lubricator (5) connects in turn, surge single ram type perventer (2) and the triple ram preventer that surges (3) composition blowout preventer set, the triple ram preventer that surges (3) is made up of shear ram preventer, blind rams preventer and half envelope ram preventer;
3. installation check wire rope sealer (6), card rope socket, installs well head constructing operation platform;
4. remove former christmas tree top thread flange, install wellhead blowout preventor group and lubricator (5), connect blowout preventer set liquid controling pipe line, carry out system debug;
5. enter in lubricator (5) under waterpower swab being connected rope socket, lubricator (5) is connected with wire rope sealer (6);
6. in well head christmas tree (8) side, liquid-operated flat valve (9) is installed, liquid-operated flat valve (9) connects gas-liquid separator (12), gas-liquid separator (12) discharge opeing port closing, gas-liquid separator (12) air exit connects choke manifold (15), choke manifold (15) is connected with sleeve pipe (17) by choke valve (16), choke manifold (15) installs pressure limiting valve (14), and pressure limiting valve (14) connects emptying igniting pipeline (13);
II hydraulic system debugging
1. the reversal valve in fluid path between swabbing operation car (7) and well head tele-control system is switched to control system voltage supply position;
2. hydraulic system is suppressed to 21Mpa, sets blowout preventer set, wire rope sealer (6) and greasing pump work pressure by pressure regulator valve;
3. surge single ram type perventer (2), shear ram preventer, blind rams preventer, half envelope ram preventer and liquid-operated flat valve (9) of switch debugging is working properly;
4. debug hydraulic work system normal after, first close the pressure stop valve controlled between shear ram preventer and accumulator in fluid path, then check that whether each pressure meter of operating desk normal, whether operating valve is in meta;
5. in pumping process, hydraulic pump is the voltage supply of well head tele-control system always;
III pumping discharge opeing with pressure
Before every mouthful of well pumping discharge opeing first, necessary first siphunculus, scraping, verify level, tubing string situation, carries out pumping discharge opeing construction after adjustment control system works is normal;
1. open well head christmas tree (8) and the gate valve of liquid-operated flat valve (9) side is installed, make well head and liquid-operated flat valve (9), gas-liquid separator (12), choke manifold (15), sleeve pipe (17) UNICOM;
2. the wellhead sluice valve on blind rams preventer and christmas tree center line is opened;
3. descend waterpower swab, speeds control is within 6m/s; When swab enters below liquid level, lowering velocity controls within 2m/s; In φ 73 oil pipe, maximum submergence must not more than 150m; In φ 89 oil pipe, maximum submergence must not more than 100m;
4. propose pumping discharge opeing on: under waterpower swab behind precalculated position, operation is carried, speeds control at 4m/s, swab is carried apart from well head 100m time, within upward strain speed reduces to 2m/s;
5. well head hilllock is responsible for observing fluidity, pressure and wire rope mark, the hand operation of commander's compounding practice; Operator is noted observing weight indicator, referring to the data variation deeply felt, and has recorded level, submergence, discharge opeing liquid measure supplemental characteristic;
6., after swab enters lubricator (5) by wellhead blowout preventor group, close blind rams preventer and observe;
7. according to fluid column situation in well, need more than 30min be observed, secondary pumping discharge opeing can be carried out;
8. the fluid reservoir of gas-liquid separator (12) enters receipts flow container (10) recovery by explosion-proof oil pump (11) after reaching and reclaiming liquid measure;
IV construction ending
1. after pumping discharge opeing terminates, waterpower swab is carried in lubricator (5), close well head control block valve;
2. after lubricator (5) pressure release, wire rope sealer (6) of dismantling, upper belt goes out waterpower swab, takes off maintenance process;
3. discharge opeing outlet gate valve and other gate valve of christmas tree is closed;
4., after hydraulic control system pressure release, the whole hydraulic control lines of wellhead blowout preventer is removed;
5. remove whole wellhead blowout preventer, recover well head original appearance;
6. remove and receive tank truck and ground gas-liquid separation device connecting line, tank car leaves well site;
7. remove well-mouth operating floor, safe folding and unfolding derrick, instrument and material are regained, and place is cleaned;
Two, well head pressure control program
I normal construction well head pressure controls
1. wire rope sealer (6) packing tightens self-sealing borehole pressure;
2. stop-leak compound is noted: in pumping discharge opeing process, swab drives liquid to time up, well head pressure raises, when leakage appears in wire rope sealer (6), first can promote greasing pump continuously to wire rope sealer (6) interior greasing until sealer packing has stop-leak compound to overflow by long-range hydraulic control platform;
3. compress packing: well head pressure continues to raise, and when greasing can not make wire rope sealer (6) seal, promotes wire rope sealer (6) packing pilot operated valve device continuously by long-range hydraulic control platform, compression packing is to wellhead sealing;
4. note stop-leak compound and the sustainable blocked operation of compression packing, if also blow-by, adjustable wire rope sealer (6) sets 10.5Mpa with greasing pump fluid control pressure is the highest;
5. close half envelope: wire rope sealer (6) greasing, also blow-by when being compressed to maximum pressure, close and partly seal ram preventer, make it collaborative with wire rope sealer (6) and seal;
II promptly shears closing well program
When discovery well head pressure can not seal, and now waterpower swab cannot have been carried safely in the above lubricator of well head (5), can start urgent shearing closing well program:
1. stop rope operation immediately, drum brake is killed fixing;
2. close the single ram type perventer (2) that surges, operating control handle continuous pressure 2-3 time, guarantees that S type slip flashboard is held tightly;
3. open the pressure stop valve controlled between shear ram preventer and accumulator in fluid path, then operating control handle closes shear ram preventer, cut off wire rope simultaneously shear ram preventer close shut-in well;
4. go up rope head and close blind rams preventer;
5. after the emergency cut-off of wellhead blowout preventor group, then close outlet liquid-operated flat valve (9), observe well head pressure;
Treatment procedures after III urgent shearing closing well
1. need to observe more than 30min after urgent closing well, well head without after pressure change, then carries out well head disposal;
If 2. well head has pressure to bleed off pressure procedure operation by well head to bleed off pressure, be zero to well head pressure;
3. surge triple ram preventer (3) and top wellhead blowout preventer thereof is removed;
4. single ram type perventer (2) top of surging is exposed fag end and is docked with swabbing operation car (7) steel wire rope head and stuckly block jail;
5. operate cylinder rope, until wire rope stressed >=well in after waterpower swab and wire rope weight, operation pilot operated valve device opens the single ram type perventer that surges (2), proposes wire rope and waterpower swab in well, closes well head christmas tree (8) gate valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510733145.7A CN105350932B (en) | 2015-11-03 | 2015-11-03 | A kind of gas well induced flow de-plugging fluid-discharge technology with pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510733145.7A CN105350932B (en) | 2015-11-03 | 2015-11-03 | A kind of gas well induced flow de-plugging fluid-discharge technology with pressure |
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| Publication Number | Publication Date |
|---|---|
| CN105350932A true CN105350932A (en) | 2016-02-24 |
| CN105350932B CN105350932B (en) | 2017-10-03 |
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| CN201510733145.7A Expired - Fee Related CN105350932B (en) | 2015-11-03 | 2015-11-03 | A kind of gas well induced flow de-plugging fluid-discharge technology with pressure |
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| CN (1) | CN105350932B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644767A (en) * | 2017-01-23 | 2017-05-10 | 山东科瑞井控系统制造有限公司 | Under-pressure shearing test device of ram blowout preventer |
| 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 |
| CN112539043A (en) * | 2018-05-17 | 2021-03-23 | 罗运川 | Cleaning method and verification method for liquid inlet of piston of underground safety valve |
| CN115163001A (en) * | 2022-08-01 | 2022-10-11 | 吕远 | Injection-production integrated device and method thereof |
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| EP0209343A2 (en) * | 1985-07-15 | 1987-01-21 | Chevron Research And Technology Company | Method of avoiding a drill string becoming stuck during drilling |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644767A (en) * | 2017-01-23 | 2017-05-10 | 山东科瑞井控系统制造有限公司 | Under-pressure shearing test device of ram blowout preventer |
| CN106644767B (en) * | 2017-01-23 | 2023-06-27 | 威飞海洋装备制造有限公司 | Ram blowout preventer under-pressure shear test device |
| 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 |
| CN112539043A (en) * | 2018-05-17 | 2021-03-23 | 罗运川 | Cleaning method and verification method for liquid inlet of piston of underground safety valve |
| CN115163001A (en) * | 2022-08-01 | 2022-10-11 | 吕远 | Injection-production integrated device and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105350932B (en) | 2017-10-03 |
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