CN105350932B - A kind of gas well induced flow de-plugging fluid-discharge technology with pressure - Google Patents
A kind of gas well induced flow de-plugging fluid-discharge technology with pressure Download PDFInfo
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- CN105350932B CN105350932B CN201510733145.7A CN201510733145A CN105350932B CN 105350932 B CN105350932 B CN 105350932B CN 201510733145 A CN201510733145 A CN 201510733145A CN 105350932 B CN105350932 B CN 105350932B
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- 238000005516 engineering process Methods 0.000 title claims abstract description 28
- 238000005086 pumping Methods 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000010276 construction Methods 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 55
- 239000010959 steel Substances 0.000 claims description 55
- 239000007788 liquid Substances 0.000 claims description 41
- 238000012856 packing Methods 0.000 claims description 17
- 241000191291 Abies alba Species 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 9
- 238000010008 shearing Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007689 inspection 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
- 230000000153 supplemental effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 239000007921 spray Substances 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
- -1 has coiled tubing Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid-Pressure Circuits (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to gas well production gas technology field, more particularly to a kind of gas well induced flow de-plugging fluid-discharge technology with pressure.The processing step is as follows：First, pumping discharge opeing construction procedure with pressure：I installs equipment：1. site layout project, vehicle spot cars, erection of derrick；2. ground connects wellhead blowout preventer：Adapter flange, the single ram type perventer that surges, the triple ram preventer that surges, bleed off pressure threeway, lubricator and be sequentially connected with, surge single ram type perventer and triple ram preventer composition preventer group of surging, the triple ram preventer that surges is made up of shear ram preventer, blind rams preventer and half envelope ram preventer.The present invention organically combines pumping discharge opeing technology and Operating Pressure technology, realize remote control operation of the swabbing operation construction with pressure to well head pressure, reduce operational risk, technology is safe and reliable, the requirement of oil gas field gas well pumping discharge opeing construction operation with pressure is met, domestic gas well swab the well in de-plugging fluid-discharge technology technological gap with pressure is filled up.
Description
Technical field：
The present invention relates to gas well production gas technology field, more particularly to a kind of gas well induced flow de-plugging fluid-discharge technology with pressure.
Background technology：
In gas well gas production production process, understand because hydrops causes gas-bearing formation water logging is blocked to cause production capacity gradually to reduce in well, even
Opened or end-of-life state in, have a strong impact on gas well yield.And gas well it is conventional at present the row such as include after operation induced flow, de-plugging pressure
The method of liquid mainly has coiled tubing, gas lift liquid drainage etc., long construction period, costly, and DeGrain sometimes.Gas well passes through
It is most economical effective method that flow string, which implements swab the well in de-plugging discharge opeing with pressure,.
Current pumping discharge opeing technology is limited to oil-water well and asked in the technique such as production induced flow or involving swab volume increase, although being taken out safely in gas well
Draw and the auxiliary facilities such as swab damper, liquid controlled blowout preventing box are have developed in technology, but due to blowout preventer equipment and technique
Technical operation is relatively easy, is still limited to the poorly efficient hydrops gas well discharge opeing construction of low-voltage and low-yield, and well head is relative without pressure and strata pressure
It is relatively small.
All the time, group company forbids strictly gas well swabbing induced flow, is exactly because to the airtight of swabbing operation steel wire rope
Envelope ability, well head air pressure blowout prevention control ability and technology do not reach gas well and take out well of well head pressure when raising suddenly after spray
Emergency disposal ability etc. is controlled to require, once well head is out of control will to cause serious consequence.
Band operation technique is ripe already, and current gas well Operating Pressure construction reaches to the blowout prevention control ability of well head air pressure
More than 100Mpa, but could not to be also effectively applied to gas well pumping construction technology with pressure technical for its well control technique.
The content 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 fluid-discharge technology with pressure, the technique is by pumping
Discharge opeing technology is organically combined with Operating Pressure technology, realizes swabbing operation construction with pressure and the remote control of well head pressure is grasped
Make, reduce operational risk, technology is safe and reliable, meets the requirement of oil gas field gas well pumping discharge opeing construction operation with pressure, fills out
Mend domestic gas well swab the well in de-plugging fluid-discharge technology technological gap with pressure.Swab the well in pressure can not be realized by overcoming existing gas well
The deficiency of de-plugging discharge opeing.
The technical solution used in the present invention is：A kind of gas well induced flow de-plugging fluid-discharge technology with pressure, the processing step is as follows：
First, pumping discharge opeing construction procedure with pressure：
I installs equipment
1. site layout project, vehicle spot cars, erection of derrick；
2. ground connects wellhead blowout preventer：Adapter flange, the single ram type perventer that surges, the triple ram preventer that surges, put
Pressure threeway, lubricator are sequentially connected with, surge single ram type perventer and triple ram preventer composition preventer group of surging, and surge three locks
Plate preventer is made up of shear ram preventer, blind rams preventer and half envelope ram preventer；
3. installation check steel wire rope sealer, card rope socket, install well head constructing operation platform；
4. former christmas tree top thread flange is removed, wellhead blowout preventor group and lubricator is installed, connects preventer group liquid
Keyholed back plate line, carries out system debug；
5. waterpower swab is connected in rope socket tripping in lubricator, lubricator is connected with steel wire rope sealer；
6. liquid-operated flat valve, liquid-operated flat valve connection gas-liquid separator, gas-liquid separator are installed in well head christmas tree side
Discharge opeing port closing, gas-liquid separator air exit connection choke manifold, choke manifold passes through choke valve and sleeve pipe connection, throttling
Manifold installs pressure limiting valve, pressure limiting valve connection emptying igniting pipeline；
II hydraulic system debugging
1. the reversal valve between swabbing operation car and well head tele-control system in fluid path is switched to and supplied to control system
Press position；
2. hydraulic system is suppressed to 21Mpa, and preventer group, steel wire rope sealer and greasing pump work are set by pressure regulator valve
Make pressure；
3. switch debugging is surged single ram type perventer, shear ram preventer, blind rams preventer, half envelope flashboard blowout prevention
Device and liquid-operated flat valve are working properly；
4. after debugging hydraulic work system is normal, first close between shear ram preventer and accumulator in control fluid path
Pressure stop valve, then whether whether normal, operation valve is in middle position to each pressure gauge of inspection operation platform；
5. hydraulic pump is well head tele-control system voltage supply always in pumping process；
III pumping discharge opeing with pressure
Necessary elder generation's siphunculus, scraping, verify level, tubing string situation, installation and debugging control before the pumping discharge opeing first of every mouthful of well
Pumping discharge opeing construction is carried out after system processed is working properly；
1. the gate valve installed in liquid-operated flat valve side on well head christmas tree is opened, makes well head and liquid-operated flat valve, gas
Liquid/gas separator, choke manifold, sleeve pipe UNICOM；
2. the wellhead sluice valve on blind rams preventer and christmas tree center line is opened；
3. waterpower swab is descended, speed control is within 6m/s；When swab enters below liquid level, lowering velocity control exists
Within 2m/s；Maximum submergence must not exceed 150m in the oil pipes of φ 73；Maximum submergence must not exceed 100m in the oil pipes of φ 89；
4. pumping discharge opeing is above proposed：To behind precalculated position under waterpower swab, carried in operation, speed control is on 4m/s, swab
When carrying away from well head 100m, upward strain speed is reduced within 2m/s；
5. observation fluidity, pressure and steel wire rope mark, the hand operation of commander's compounding practice are responsible in well head hilllock；Manipulator notes seeing
Examine weight indicator, refer to the data variation deeply felt, and record level, submergence, discharge opeing liquid measure supplemental characteristic；
6. swab is entered after lubricator by wellhead blowout preventor group, is closed blind rams preventer and is observed；
7. according to fluid column situation in well, more than 30min need to be observed, secondary pumping discharge opeing can be carried out；
8. the fluid reservoir of gas-liquid separator reaches that being discharged into receipts flow container by explosion-proof oil pump after recovery liquid measure reclaims；
IV construction ending
1. after pumping discharge opeing terminates, waterpower swab is carried to lubricator, well head control block valve is closed；
2. after lubricator pressure release, steel wire rope sealer of dismantling, upper belt goes out waterpower swab, removes maintenance processing；
3. discharge opeing outlet gate valve and the other gate valves of christmas tree are closed；
4. after hydraulic control system pressure release, the whole hydraulic control lines of wellhead blowout preventer are removed；
5. whole wellhead blowout preventers are removed, recover well head original appearance；
6. remove and receive tank truck and ground gas-liquid separation device connecting pipeline, tank car leaves well site；
7. well-mouth operating floor is removed, safe folding and unfolding derrick, instrument and material are withdrawn, place cleaning；
2nd, well head pressure control program
I normal construction well head pressure is controlled
1. steel wire rope sealer packing tightens self-sealing borehole pressure；
2. stop-leak compound is noted：In pumping discharge opeing process, swab drive liquid to it is up when, well head pressure rise, steel wire rope is close
When envelope device is missed, first pass through long-range hydraulic control platform and continuously promote greasing pump to greasing in steel wire rope sealer until sealer disk
Root has stop-leak compound spilling；
3. packing is compressed：Well head pressure continues to raise, and when greasing can not make the sealing of steel wire rope sealer, passes through long-range hydraulic control
Platform continuously promotes steel wire rope sealer packing pilot operated valve device, compression packing to wellhead sealing；
4. note stop-leak compound and compression packing can continue blocked operation, if also blow-by, adjustment steel wire rope sealer and note
Fat pump liquid governor pressure highest setting 10.5Mpa；
5. half is closed to seal：The greasing of steel wire rope sealer, also blow-by when being compressed to maximum pressure, close half envelope flashboard blowout prevention
Device, is allowed to cooperate with sealing with steel wire rope sealer；
II urgent shearing closing well program
When finding that well head pressure can not seal, and now waterpower swab can not have been carried safely to well head above lubricator,
Start urgent shearing closing well program：
1. stop rope operation immediately, fixation is killed into drum brake；
2. surge single ram type perventer, operating control handle continuous pressure 2-3 times are closed, it is ensured that S types slip flashboard is held tightly；
3. the pressure stop valve in control fluid path between shear ram preventer and accumulator is opened, then operational control hand
Handle closes shear ram preventer, and cutting steel wire rope, shear ram preventer closes shut-in well simultaneously；
4. upper rope head closes blind rams preventer；
5. after the emergency cut-off of wellhead blowout preventor group, outlet liquid-operated flat valve is turned off, well head pressure is observed；
Treatment procedures after III urgent shearing closing well
1. need to observe more than 30min after urgent closing well, after the change of well head no pressure, then carry out well head disposal；
It is zero to well head pressure if 2. well head has pressure to bleed off pressure procedure operation by well head and bled off pressure；
3. surge triple ram preventer and its top wellhead blowout preventer are removed；
4. will surge single ram type perventer top expose fag end docked with swabbing operation car steel wire rope head it is stuck card jail；
5. roller rope is operated, after after waterpower swab in steel wire rope stress >=well and steel wire rope weight, operation pilot operated valve device is beaten
The single ram type perventer that surges is opened, steel wire rope and waterpower swab in well is proposed, well head christmas tree gate valve is closed.
The beneficial effects of the invention are as follows：The present invention organically combines pumping discharge opeing technology and Operating Pressure technology, realizes
Swabbing operation construction with pressure reduces operational risk, technology is safe and reliable, meets oil to the remote control operation of well head pressure
The requirement of gas field gas well pumping discharge opeing construction operation with pressure, fills up domestic gas well swab the well in de-plugging fluid-discharge technology technology with pressure empty
In vain.
Brief description of the drawings：
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Fig. 1 is wellhead blowout preventer structural representation.
Fig. 2 is discharge opeing control device of exit pressure schematic diagram.
Embodiment：
A kind of gas well induced flow de-plugging fluid-discharge technology with pressure, the processing step is as follows：
First, pumping discharge opeing construction procedure with pressure：
I installs equipment
1. site layout project, vehicle spot cars, erection of derrick；
2. ground connects 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 to be sequentially connected with, surge single ram type perventer 2 and surge the composition preventer group of triple ram preventer 3, liquid
Dynamic triple ram preventer 3 is made up of shear ram preventer, blind rams preventer and half envelope ram preventer, as shown in Figure 1；
3. installation check steel wire rope sealer 6, card rope socket, install well head constructing operation platform；
4. former christmas tree top thread flange is removed, wellhead blowout preventor group and lubricator 5 is installed, connects preventer group liquid
Keyholed back plate line, carries out system debug；
5. waterpower swab is connected in rope socket tripping in lubricator 5, lubricator 5 is connected with steel wire rope sealer 6；
6. liquid-operated flat valve 9, the connection gas-liquid separator 12 of liquid-operated flat valve 9, gas-liquid point are installed in the side of well head christmas tree 8
From the discharge opeing port closing of device 12, the air exit of gas-liquid separator 12 connection choke manifold 15, choke manifold 15 passes through choke valve 16
It is connected with sleeve pipe 17, choke manifold 15 installs pressure limiting valve 14, the connection of pressure limiting valve 14 is vented igniting pipeline 13, as shown in Figure 2；
II hydraulic system debugging
1. the reversal valve between swabbing operation car 7 and well head tele-control system in fluid path is switched to and supplied to control system
Press position；
2. hydraulic system is suppressed to 21Mpa, and preventer group, steel wire rope sealer 6 and greasing pump are set by pressure regulator valve
Operating pressure；
3. surge single ram type perventer 2, shear ram preventer, blind rams preventer, half envelope flashboard of switch debugging is prevented
Spray apparatus and liquid-operated flat valve 9 are working properly；
4. after debugging hydraulic work system is normal, first close between shear ram preventer and accumulator in control fluid path
Pressure stop valve, then whether whether normal, operation valve is in middle position to each pressure gauge of inspection operation platform；
5. hydraulic pump is well head tele-control system voltage supply always in pumping process；
III pumping discharge opeing with pressure
Necessary elder generation's siphunculus, scraping, verify level, tubing string situation, installation and debugging control before the pumping discharge opeing first of every mouthful of well
Pumping discharge opeing construction is carried out after system processed is working properly；
1. open the gate valve installed in the side of liquid-operated flat valve 9 on well head christmas tree 8, make well head and liquid-operated flat valve 9,
Gas-liquid separator 12, choke manifold 15, the UNICOM of sleeve pipe 17；
2. the wellhead sluice valve on blind rams preventer and christmas tree center line is opened；
3. waterpower swab is descended, speed control is within 6m/s；When swab enters below liquid level, lowering velocity control exists
Within 2m/s；Maximum submergence must not exceed 150m in the oil pipes of φ 73；Maximum submergence must not exceed 100m in the oil pipes of φ 89；
4. pumping discharge opeing is above proposed：To behind precalculated position under waterpower swab, carried in operation, speed control is on 4m/s, swab
When carrying away from well head 100m, upward strain speed is reduced within 2m/s；
5. observation fluidity, pressure and steel wire rope mark, the hand operation of commander's compounding practice are responsible in well head hilllock；Manipulator notes seeing
Examine weight indicator, refer to the data variation deeply felt, and record level, submergence, discharge opeing liquid measure supplemental characteristic；
6. swab is entered after lubricator 5 by wellhead blowout preventor group, is closed blind rams preventer and is observed；
7. according to fluid column situation in well, more than 30min need to be observed, secondary pumping discharge opeing can be carried out；
8. the fluid reservoir of gas-liquid separator 12 reaches that being discharged into receipts flow container 10 by explosion-proof oil pump 11 after recovery liquid measure reclaims；
IV construction ending
1. after pumping discharge opeing terminates, waterpower swab is carried to lubricator 5, well head control block valve is closed；
2. after the pressure release of lubricator 5, steel wire rope sealer 6 of dismantling, upper belt goes out waterpower swab, removes maintenance processing；
3. discharge opeing outlet gate valve and the other gate valves of christmas tree are closed；
4. after hydraulic control system pressure release, the whole hydraulic control lines of wellhead blowout preventer are removed；
5. whole wellhead blowout preventers are removed, recover well head original appearance；
6. remove and receive tank truck and ground gas-liquid separation device connecting pipeline, tank car leaves well site；
7. well-mouth operating floor is removed, safe folding and unfolding derrick, instrument and material are withdrawn, place cleaning；
2nd, well head pressure control program
I normal construction well head pressure is controlled
1. the packing of steel wire rope sealer 6 tightens self-sealing borehole pressure；
2. stop-leak compound is noted：In pumping discharge opeing process, swab drive liquid to it is up when, well head pressure rise, steel wire rope is close
When envelope device 6 is missed, first pass through long-range hydraulic control platform and continuously promote greasing pump to greasing in steel wire rope sealer 6 until sealer
Packing has stop-leak compound spilling；
3. packing is compressed：Well head pressure continues to raise, and when greasing can not make the sealing of steel wire rope sealer 6, passes through long-range liquid
Control platform continuously promotes the packing pilot operated valve device of steel wire rope sealer 6, compression packing to wellhead sealing；
4. note stop-leak compound and compression packing can continue blocked operation, if also blow-by, adjustment steel wire rope sealer 6 and note
Fat pump liquid governor pressure highest setting 10.5Mpa；
5. half is closed to seal：The greasing of steel wire rope sealer 6, also blow-by when being compressed to maximum pressure, close half envelope flashboard blowout prevention
Device, is allowed to cooperate with sealing with steel wire rope sealer 6；
II urgent shearing closing well program
When finding that well head pressure can not seal, and now waterpower swab can not have been carried safely to well head above lubricator 5,
Start urgent shearing closing well program：
1. stop rope operation immediately, fixation is killed into drum brake；
2. surge single ram type perventer 2, operating control handle continuous pressure 2-3 times are closed, it is ensured that S types slip flashboard is embraced
Tightly；
3. the pressure stop valve in control fluid path between shear ram preventer and accumulator is opened, then operational control hand
Handle closes shear ram preventer, and cutting steel wire rope, shear ram preventer closes shut-in well simultaneously；
4. upper rope head closes blind rams preventer；
5. after the emergency cut-off of wellhead blowout preventor group, outlet liquid-operated flat valve 9 is turned off, well head pressure is observed；
Treatment procedures after III urgent shearing closing well
1. need to observe more than 30min after urgent closing well, after the change of well head no pressure, then carry out well head disposal；
It is zero to well head pressure if 2. well head has pressure to bleed off pressure procedure operation by well head and bled off pressure；
3. surge triple ram preventer 3 and its top wellhead blowout preventer are removed；
4. will surge the top of single ram type perventer 2 expose fag end docked with the steel wire rope head of swabbing operation car 7 it is stuck card jail；
5. roller rope is operated, after after waterpower swab in steel wire rope stress >=well and steel wire rope weight, operation pilot operated valve device is beaten
The single ram type perventer 2 that surges is opened, steel wire rope and waterpower swab in well is proposed, the gate valve of well head christmas tree 8 is closed.
It is understood that above with respect to the specific descriptions of the present invention, being merely to illustrate the present invention and being not limited to this
Technical scheme described by inventive embodiments, it will be understood by those within the art that, still can be to present invention progress
Modification or equivalent substitution, to reach identical technique effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (1)
1. a kind of gas well induced flow de-plugging fluid-discharge technology with pressure, it is characterised in that：The processing step is as follows：
First, pumping discharge opeing construction procedure with pressure：
I installs equipment
1. site layout project, vehicle spot cars, erection of derrick；
2. ground connects wellhead blowout preventer：Adapter flange (1), the single ram type perventer that surges (2), surge triple ram preventer
(3), bleed off pressure threeway (4), lubricator (5) to be sequentially connected with, the single ram type perventer that surges (2) and the triple ram preventer that surges (3) group
Into preventer group, the triple ram preventer that surges (3) is by shear ram preventer, blind rams preventer and half envelope ram preventer
Composition；
3. installation check steel wire rope sealer (6), card rope socket, install well head constructing operation platform；
4. former christmas tree top thread flange is removed, wellhead blowout preventor group and lubricator (5) is installed, connects preventer group hydraulic control
Pipeline, carries out system debug；
5. waterpower swab is connected in rope socket tripping in lubricator (5), lubricator (5) is connected with steel wire rope sealer (6)；
6. liquid-operated flat valve (9), liquid-operated flat valve (9) connection gas-liquid separator (12), gas are installed in well head christmas tree (8) side
Liquid/gas separator (12) discharge opeing port closing, gas-liquid separator (12) air exit connection choke manifold (15), choke manifold (15)
It is connected by choke valve (16) with sleeve pipe (17), choke manifold (15) installs pressure limiting valve (14), pressure limiting valve (14) connection emptying point
Fire tube line (13)；
II hydraulic system debugging
1. the reversal valve between swabbing operation car (7) and well head tele-control system in fluid path is switched to and gives control system voltage supply
Position；
2. hydraulic system is suppressed to 21Mpa, and preventer group, steel wire rope sealer (6) and greasing pump work are set by pressure regulator valve
Make pressure；
3. switch debugging is surged single ram type perventer (2), shear ram preventer, blind rams preventer, half envelope flashboard blowout prevention
Device and liquid-operated flat valve (9) are working properly；
4. after debugging hydraulic work system is normal, the pressure in control fluid path between shear ram preventer and accumulator is first closed
Stop valve, then whether whether normal, operation valve is in middle position to each pressure gauge of inspection operation platform；
5. hydraulic pump is well head tele-control system voltage supply always in pumping process；
III pumping discharge opeing with pressure
Necessary elder generation's siphunculus, scraping, verify level, tubing string situation, adjustment control system before the pumping discharge opeing first of every mouthful of well
Pumping discharge opeing construction is carried out after system is working properly；
1. the gate valve installed in liquid-operated flat valve (9) side on well head christmas tree (8) is opened, makes 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. waterpower swab is descended, speed control is within 6m/s；When swab enter liquid level below when, lowering velocity control 2m/s with
It is interior；Maximum submergence must not exceed 150m in the oil pipes of φ 73；Maximum submergence must not exceed 100m in the oil pipes of φ 89；
4. pumping discharge opeing is above proposed：To behind precalculated position under waterpower swab, carried in operation, speed control carried on 4m/s, swab away from
During well head 100m, upward strain speed is reduced within 2m/s；
5. observation fluidity, pressure and steel wire rope mark, the hand operation of commander's compounding practice are responsible in well head hilllock；Manipulator notices that observation refers to
Weigh table, refer to the data variation deeply felt, and record level, submergence, discharge opeing liquid measure supplemental characteristic；
6. swab is entered after lubricator (5) by wellhead blowout preventor group, is closed blind rams preventer and is observed；
7. according to fluid column situation in well, more than 30min need to be observed, secondary pumping discharge opeing can be carried out；
8. the fluid reservoir of gas-liquid separator (12) reaches that being discharged into receipts flow container (10) by explosion-proof oil pump (11) after recovery liquid measure reclaims；
IV construction ending
1. after pumping discharge opeing terminates, waterpower swab is carried to lubricator (5), well head control block valve is closed；
2. after lubricator (5) pressure release, steel wire rope sealer (6) of dismantling, upper belt goes out waterpower swab, removes maintenance processing；
3. discharge opeing outlet gate valve and the other gate valves of christmas tree are closed；
4. after hydraulic control system pressure release, the whole hydraulic control lines of wellhead blowout preventer are removed；
5. whole wellhead blowout preventers are removed, recover well head original appearance；
6. remove and receive tank truck and ground gas-liquid separation device connecting pipeline, tank car leaves well site；
7. well-mouth operating floor is removed, safe folding and unfolding derrick, instrument and material are withdrawn, place cleaning；
2nd, well head pressure control program
I normal construction well head pressure is controlled
1. steel wire rope sealer (6) packing tightens self-sealing borehole pressure；
2. stop-leak compound is noted：In pumping discharge opeing process, swab drive liquid to it is up when, well head pressure rise, steel wire rope sealer
(6) when missing, first pass through long-range hydraulic control platform and continuously promote greasing pump to steel wire rope sealer (6) interior greasing until sealer
Packing has stop-leak compound spilling；
3. packing is compressed：Well head pressure continues to raise, and when greasing can not make steel wire rope sealer (6) sealing, passes through long-range hydraulic control
Platform continuously promotes steel wire rope sealer (6) packing pilot operated valve device, compression packing to wellhead sealing；
4. note stop-leak compound and compression packing can continue blocked operation, if also blow-by, adjustment steel wire rope sealer (6) and greasing
Pump liquid governor pressure highest setting 10.5Mpa；
5. half is closed to seal：Steel wire rope sealer (6) greasing, also blow-by when being compressed to maximum pressure, close half envelope ram preventer,
It is allowed to cooperate with sealing with steel wire rope sealer (6)；
II urgent shearing closing well program
When finding that well head pressure can not seal, and now waterpower swab can not have been carried safely in well head above lubricator (5), be opened
Dynamic urgent shearing closing well program：
1. stop rope operation immediately, fixation is killed into drum brake；
2. surge single ram type perventer (2), operating control handle continuous pressure 2-3 times are closed, it is ensured that S types slip flashboard is held tightly；
3. the pressure stop valve in control fluid path between shear ram preventer and accumulator is opened, then operating control handle is closed
Shear ram preventer is closed, cutting steel wire rope, shear ram preventer closes shut-in well simultaneously；
4. upper rope head closes blind rams preventer；
5. after the emergency cut-off of wellhead blowout preventor group, outlet liquid-operated flat valve (9) is turned off, well head pressure is observed；
Treatment procedures after III urgent shearing closing well
1. need to observe more than 30min after urgent closing well, after the change of well head no pressure, then carry out well head disposal；
It is zero to well head pressure if 2. well head has pressure to bleed off pressure procedure operation by well head and bled off pressure；
3. surge triple ram preventer (3) and its top wellhead blowout preventer are removed；
4. will surge single ram type perventer (2) top expose fag end docked with swabbing operation car (7) steel wire rope head it is stuck card jail；
5. roller rope is operated, after after waterpower swab in steel wire rope stress >=well and steel wire rope weight, operation pilot operated valve device opens liquid
Dynamic single ram type perventer (2), proposes steel wire rope and waterpower swab in well, closes well head christmas tree (8) gate valve.
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| 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 |
| 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 |
| CN112539043B (en) * | 2018-05-17 | 2022-08-19 | 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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| US3213941A (en) * | 1962-02-01 | 1965-10-26 | Nelson Norman A | Method of and apparatus for releasing stuck pipe |
| 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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| US6808023B2 (en) * | 2002-10-28 | 2004-10-26 | Schlumberger Technology Corporation | Disconnect check valve mechanism for coiled tubing |
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| US3213941A (en) * | 1962-02-01 | 1965-10-26 | Nelson Norman A | Method of and apparatus for releasing stuck pipe |
| EP0209343A2 (en) * | 1985-07-15 | 1987-01-21 | Chevron Research And Technology Company | Method of avoiding a drill string becoming stuck during drilling |
| CN1361346A (en) * | 2000-12-29 | 2002-07-31 | 中国石油天然气股份有限公司 | Repeated pressurizing and depressurizing pulse blockage removal process |
| CN102312659A (en) * | 2010-07-02 | 2012-01-11 | 崔朝轩 | Pollution-free well workover process for oil field |
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