CN105089524A - Device and process method for lifting coiled tubing out under pressure - Google Patents
Device and process method for lifting coiled tubing out under pressure Download PDFInfo
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- CN105089524A CN105089524A CN201510220101.4A CN201510220101A CN105089524A CN 105089524 A CN105089524 A CN 105089524A CN 201510220101 A CN201510220101 A CN 201510220101A CN 105089524 A CN105089524 A CN 105089524A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 51
- 239000007924 injection Substances 0.000 claims abstract description 51
- 230000002265 prevention Effects 0.000 claims description 32
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 241000191291 Abies alba Species 0.000 claims description 8
- 239000003129 oil well Substances 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 241000521257 Hydrops Species 0.000 description 3
- 206010030113 Oedema Diseases 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
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Abstract
The invention relates to a device and a process method for lifting a coiled tubing under pressure, belonging to the technical field of gas field exploitation. The method comprises the following steps: clamping a feeding tool and a connector of the in-pipe plug by using an injection head on the coiled tubing machine, and driving the in-pipe plug into the coiled tubing; lifting the tool on the injection head to seal the in-pipe plug, increasing the lifting force of the injection head to separate the in-pipe plug from the feeding tool, and keeping the in-pipe plug inside the coiled tubing and sealing the coiled tubing; penetrating a core rod into the end head of the continuous oil pipe, installing an outer clamping puller on the end head of the continuous oil pipe, and hoisting the outer slip puller by using a crane to lift the continuous oil pipe so as to enable a slip suspending the continuous oil pipe to be unlocked; and (3) enabling the lifted coiled tubing to sequentially reversely penetrate through equipment such as an operation window, a blowout preventer and an injection head, then continuously lifting the coiled tubing by using the injection head, and simultaneously winding the continuously lifted tubing into a roller on the coiled tubing operation machine.
Description
Technical field
The present invention relates to and a kind of with pressurely trip out applications of coiled tubing unit and process, belong to gas-field exploitation technical field.
Background technology
Along with continuing of gas well liquid loading time, gas well deliverability reduces gradually, lower than critical take flow velocity time shaft bottom start hydrops, if take discharge opeing measure not in time, gas well water logging, stopping production can be made.Based on pit shaft two phase flow with minimumly take flow quantity theory, the coiled tubing of minor diameter is entered as flow string under in former pit shaft, it is made to be suspended on gas production wellhead by special hanger after cutting off coiled tubing, this technology can reduce the critical of gas well to a certain extent and take flow velocity, increase gas flow rate in pit shaft, thus improve gas well fluid-carrying capability, ensure the steady production of gas well.Take liquid when employing coiled tubing to produce for a long time, the actual production of gas well lower than the critical liquid carrying flow rate of coiled tubing, there is hydrops in gas well, now again, because coiled tubing diameter is very little, other water pumping gas production measures being applicable to low tolerance hydrops gas well cannot be implemented.In addition, the operation such as secondary fracturing transformation, well testing, well workover, test of oldish well also needs to trip out coiled tubing.Can use for reference the technique that kill-job plays oil pipe at present, trip out coiled tubing after kill-job, but kill job is very large to reservoir damage, the human and material resources expended are more.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides and a kind of with pressurely trip out applications of coiled tubing unit and process.
One is with pressure trips out one of applications of coiled tubing unit, the lower end of coiled tubing is down in pit shaft, the upper end of coiled tubing is through main control valve, adapter flange, and be suspended on hanger, main control valve connects hanger, and the other end of hanger connects adapter flange, and the other end of adapter flange connects gate valve, the other end of gate valve connects little four-way, and the other end of little four-way connects gate valve.
One is with pressure trips out applications of coiled tubing unit two, the lower end of coiled tubing is down in pit shaft, the upper end of coiled tubing is through main control valve, adapter flange, and be suspended on hanger, main control valve connects hanger, the other end of hanger connects adapter flange, the other end of adapter flange connects gate valve, the other end of gate valve connects another adapter flange, the other end attended operation window of adapter flange, blanking plug in the inner chamber tube connector of operation window, first running tool, the other end of operation window connects four ram preventers, the other end of four ram preventers connects blowout prevention box, the other end of blowout prevention box connects injection head, second running tool is through injection head, blowout prevention box, four ram preventers, and be connected with the first running tool.
One is with pressure trips out applications of coiled tubing unit three, the lower end of coiled tubing is down in pit shaft, the upper end of coiled tubing is through main control valve, and being suspended on hanger, the top of hanger is located optical-rod clamp, the locking coiled tubing of optical-rod clamp, there is blanking plug in the pipe squeezed into coiled tubing inside, the upper end inside of coiled tubing is inserted with plug, and the upper end outside of coiled tubing is provided with wild card drawbench, and crane connects wild card drawbench by suspension hook.
One is with pressure trips out applications of coiled tubing unit four, the lower end of coiled tubing is down in pit shaft, the upper end of coiled tubing is through main control valve, there is blanking plug in the pipe squeezed into coiled tubing inside, coiled tubing is suspended on hanger, the other end attended operation window of hanger, the other end of operation window connects four ram preventers, the other end of four ram preventers connects blowout prevention box, the other end of blowout prevention box connects injection head, injection head is hung by crane, and the other end of injection head connects guider, and the other end of guider connects coiled tubing work vehicle.
One is with pressure trips out coiled tubing process, containing following steps:
Step 1, shutoff coiled tubing;
Remove gas production wellhead gate valve top christmas tree (i.e. little four-way and gate valve) before operation, on the right side of gate valve, blank flange is installed, then on gate valve top, crossover flange, operation window, preventer, injection head is installed successively; After running tool is connected with blanking plug in pipe, by injection head clamping running tool, blanking plug in pipe is squeezed into coiled tubing inside, after managing interior blanking plug and effectively setting, running tool and blanking plug are departed from; In pipe, coiled tubing inside stayed by blanking plug, and seal coiled tubing.
Step 2, on carry coiled tubing;
Penetrate plug in coiled tubing termination, wild card drawbench is arranged on continuous-tube termination; Hang on external slips drawbench with crane and carry coiled tubing, after making that coiled tubing sufficient length is put forward in slips unfreezing also, by coiled tubing anti-dress operation window, the preventer successively tripped out, then use instead in injection head continuation and carry coiled tubing, the pipe constantly tripped out is entangled to the cylinder on coild tubing unit simultaneously.
To achieve these goals, according to an aspect of the present invention, provide and a kind of with pressurely trip out applications of coiled tubing unit, the applications of coiled tubing unit that trips out with pressure has the operation window be tightly connected in turn, four lock preventers, blowout prevention box and injection head, the applications of coiled tubing unit that trips out with pressure also has running tool, blanking plug and wild card drawbench in pipe, running tool is successively through operation window, four lock preventers, blowout prevention box and injection head, in pipe, blanking plug is connected on the end of running tool, in pipe, blanking plug is used for shutoff coiled tubing, when tripping out coiled tubing, wild card drawbench is fixed on the end of coiled tubing, and wild card drawbench is connected in external motive device.
Further, the applications of coiled tubing unit that trips out with pressure also has guider, guider be connected to injection head away from one end of blowout prevention box, guider be used for coiled tubing is led.
Further, the applications of coiled tubing unit that trips out with pressure also has the second adapter flange, and the second adapter flange is connected between the gate valve of operation window and oil well mouth.
Further, running tool comprises the first running tool and the second running tool, and the first running tool is connected with the second running tool, and the second running tool extends outside injection head.
According to a further aspect in the invention, provide and a kind of with pressurely trip out coiled tubing process, the applications of coiled tubing unit that trips out with pressure of application of aforementioned carries out tripping out coiled tubing, and the coiled tubing process that trips out with pressure comprises the following steps:
Step S1: the top christmas tree removing oil well mouth after being closed by the gate valve of oil well mouth, then be connected to operation window, four lock preventers, blowout prevention box and injection head in turn gate valve, and utilize running tool will send in coiled tubing with shutoff coiled tubing;
Step S2: after blanking plug shutoff coiled tubing, operation window, four lock preventers, blowout prevention box and injection head are removed in pipe, and utilize wild card drawbench to connect the end of coiled tubing, trip out coiled tubing by external motive device.
Further, in the process of step S2, after coiled tubing is tripped out preset distance, the coiled tubing process that trips out with pressure also comprises step S3: remove wild card drawbench, then operation window, four lock preventers, blowout prevention box and injection head are connected in turn on the work package being set on coiled tubing at oil well mouth place, coiled tubing is tripped out by external motive device through after operation window, four lock preventers, blowout prevention box and injection head.
In the process of step S2, gate valve is removed, and the first adapter flange of work package is removed, then operation window is connected on the hanger of work package.
Advantage of the present invention is, safe when no killing well, simple and direct, trip out coiled tubing efficiently, avoids damaging reservoir.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by referring to detailed description below, more completely can understand the present invention better and easily learn wherein many adjoint advantages, but accompanying drawing described herein is used to provide a further understanding of the present invention, form a part of the present invention, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention, wherein:
Fig. 1 is the structural representation of the production wellhead of coiled tubing water pumping gas production gas well;
Fig. 2 is that of the present invention squeezing into manages interior plug structure schematic diagram;
Crane of the present invention traction wild card drawbench carries coiled tubing structural representation to Fig. 3;
Fig. 4 is that injection head of the present invention plays coiled tubing structural representation.
Below in conjunction with drawings and Examples, the present invention is further described.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
One is with pressure trips out applications of coiled tubing unit and process, particularly how to trip out coiled tubing when no killing well, is applicable to the gas well adopting coiled tubing as flow string.
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present invention belong to protection scope of the present invention.
Embodiment 1: one is with pressure trips out applications of coiled tubing unit, as shown in Figure 1, the lower end of coiled tubing 1 is down in pit shaft, and the upper end of coiled tubing 1 through main control valve 2, first adapter flange 4, and is suspended on hanger 3, main control valve 2 connects hanger 3, the other end of hanger 3 connects the other end connection gate valve 5 of the first adapter flange 4, first adapter flange 4, and the other end of gate valve 5 connects little four-way 6, the other end of little four-way 6 connects gate valve 7
As shown in Figure 2, the lower end of coiled tubing 1 is down in pit shaft, the upper end of coiled tubing 1 is through main control valve 2, adapter flange 4, and be suspended on hanger 3, main control valve 2 connects hanger 3, the other end of hanger 3 connects the first adapter flange 4, the other end of the first adapter flange 4 connects gate valve 5, the other end of gate valve 5 connects another the second adapter flange 8, the other end attended operation window 10 of the second adapter flange 8, blanking plug 9 in the inner chamber tube connector of operation window 10, first running tool 11, the other end of operation window 10 connects four ram preventers 12, the other end of four ram preventers 12 connects blowout prevention box 13, the other end of blowout prevention box 13 connects injection head 14, second running tool 15 is through injection head 14, blowout prevention box 13, four ram preventers 12, and be connected with the first running tool 11,
As shown in Figure 3, the lower end of coiled tubing 1 is down in pit shaft, the upper end of coiled tubing 1 through main control valve 2, and is suspended on hanger 3, and the top of hanger 3 is located optical-rod clamp 16, the locking coiled tubing 1 of optical-rod clamp 16, there is blanking plug 9 in the pipe squeezed into coiled tubing 1 inside, and the upper end inside of coiled tubing 1 is inserted with plug 17, and the upper end outside of coiled tubing 1 is provided with wild card drawbench 18, crane 19 connects wild card drawbench 18 by suspension hook
As shown in Figure 4, the lower end of coiled tubing 1 is down in pit shaft, the upper end of coiled tubing 1 is through main control valve 2, there is blanking plug 9 in the pipe squeezed into coiled tubing 1 inside, coiled tubing 1 is suspended on hanger 3, the other end attended operation window 10 of hanger 3, the other end of operation window 10 connects four ram preventers 12, the other end of four ram preventers 12 connects blowout prevention box 13, the other end of blowout prevention box 13 connects injection head 14, and injection head 14 is hung by crane 19, and the other end of injection head 14 connects guider 20, the other end of guider 20 connects coiled tubing work vehicle 21
Embodiment 2: a kind of for the method tripping out coiled tubing in gas well with pressure, as shown in Figure 1, Figure 2, Figure 3, Figure 4,
1, blanking plug in pipe is squeezed into;
(1) closing gate valve 5, removes top christmas tree, i.e. little four-way 6, gate valve 7.
(2) use explosion-proof instrument, by the second adapter flange 8, operation window 10, four ram preventer 12, blowout prevention box 13, injection head 14, be arranged on the top of christmas tree gate valve 5 successively.
(3) connect the first running tool 11, second running tool 15, then passed injection head 14, blowout prevention box 13, four ram preventer 12, operation window 10.Opening operation window 10, within it the first running tool 11, second running tool 15 connected is connected with blanking plug 9 in pipe by cylinder place.
(4) sealed blowout preventing box 13, open gate valve 5, with injection head 14, the connector of blanking plug 9 in first running tool 11, second running tool 15 and pipe is squeezed into the inside of coiled tubing 1 lentamente, the heavy instrumented data of the finger on close observation coiled tubing work vehicle.
(5) when in managing, about 1.5 ~ 2.0m place, coiled tubing 1 to precalculated position squeezed into by blanking plug 9, on injection head 14, second carries running tool 15, and in pipe, blanking plug 9 sets; Injection head 14 increased force will again on carry, in pipe, blanking plug 9 and the first running tool 11 depart from, and stay precalculated position.
(6) the first running tool 11, second running tool 15 is tripped out, closing gate valve 5.
(7) confirm, in pipe after blanking plug 9 good seal, to remove injection head 14, blowout prevention box 13, four ram preventer 12, operation window 10, second adapter flange 8 successively, then remove first adapter flange 4 on gate valve 5 and hanger 3 top.
2, crane traction wild card drawbench carries coiled tubing;
(1) penetrate plug 17 at the upper end of coiled tubing 1, and wild card drawbench 18 is arranged on the upper end of continuous-tube 1.
(2) packing element of hanger 3 is adjusted to movable sealing state.Crane 19 is carried coiled tubing 1, after the kilocalorie of hanger 3 disintegrates card, take out the large slips hanging coiled tubing 1.After continuation being carried coiled tubing 1 about 6 meters, with optical-rod clamp 16 by locking for coiled tubing 1.
3, injection head trips out coiled tubing;
(1) the wild card drawbench 18 of coiled tubing 1 termination is taken down, then anti-dress operation window 10, four ram preventer 12 successively.
(2) again wild card drawbench 18 is arranged on the termination of coiled tubing 1, hangs wild card drawbench 18 with crane 19, remove optical-rod clamp 16, operation window 10, four ram preventer 12 penetrated is arranged on hanger 3 successively.
(3) utilize the suspension flashboard of four ram preventers 12 to hang coiled tubing 1, then take down the wild card drawbench 18 of coiled tubing 1 termination, and instead wear blowout prevention box 13, injection head 14.Injection head 14 is installed guider 20, the coiled tubing 1 tripped out is entangled on the cylinder of coiled tubing work vehicle 21 by guider 20.
(4) utilize injection head 14 to trip out coiled tubing 1, the coiled tubing 1 constantly tripped out is continued to be entangled on the cylinder of coiled tubing work vehicle 21 simultaneously.
(5) rise after pipe operation completes, close christmas tree master control gate valve 2, remove injection head 14, blowout prevention box 13, preventer 12, operation window 10, hanger 3 successively, recover former christmas tree.
As mentioned above, embodiments of the invention are explained, but as long as do not depart from inventive point of the present invention in fact and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation is also all included within protection scope of the present invention.
Claims (11)
1. one kind with pressurely trips out applications of coiled tubing unit, it is characterized in that, the lower end of coiled tubing (1) is down in pit shaft, the upper end of coiled tubing (1) is through main control valve (2), first adapter flange (4), and be suspended on hanger (3), main control valve (2) connects hanger (3), the other end of hanger (3) connects the first adapter flange (4), the other end of the first adapter flange (4) connects gate valve (5), the other end of gate valve (5) connects little four-way (6), the other end of little four-way (6) connects gate valve (7).
2. one according to claim 1 is with pressure trips out applications of coiled tubing unit, it is characterized in that, the lower end of coiled tubing (1) is down in pit shaft, the upper end of coiled tubing (1) is through main control valve (2), first adapter flange (4), and be suspended on hanger (3), main control valve (2) connects hanger (3), the other end of hanger (3) connects the first adapter flange (4), the other end of the first adapter flange (4) connects gate valve (5), the other end of gate valve (5) connects another the second adapter flange (8), the other end attended operation window (10) of the second adapter flange (8), blanking plug (9) in the inner chamber tube connector of operation window (10), first running tool (11), the other end of operation window (10) connects four ram preventers (12), the other end of four ram preventers (12) connects blowout prevention box (13), the other end of blowout prevention box (13) connects injection head (14), second running tool (15) is through injection head (14), blowout prevention box (13), four ram preventers (12), and be connected with the first running tool (11).
3. one according to claim 1 is with pressure trips out applications of coiled tubing unit, it is characterized in that, the lower end of coiled tubing (1) is down in pit shaft, the upper end of coiled tubing (1) is through main control valve (2), and be suspended on hanger (3), the top of hanger (3) is located optical-rod clamp (16), optical-rod clamp (16) locking coiled tubing (1), there is blanking plug (9) in the pipe squeezed into coiled tubing (1) inside, the upper end inside of coiled tubing (1) is inserted with plug (17), the upper end outside of coiled tubing (1) is provided with wild card drawbench (18), crane (19) connects wild card drawbench (18) by suspension hook.
4. with pressurely trip out a coiled tubing process, it is characterized in that, containing following steps:
Step 1, shutoff coiled tubing;
Gas production wellhead gate valve (5) top christmas tree is removed before operation, i.e. little four-way (6) and gate valve (7), on gate valve (7) right side, blank flange is installed, then on gate valve (5) top, crossover flange, operation window, preventer, injection head is installed successively; After running tool is connected with blanking plug in pipe, by injection head clamping running tool, blanking plug in pipe is squeezed into coiled tubing inside, after managing interior blanking plug and effectively setting, running tool and blanking plug are departed from;
Step 2, on carry coiled tubing;
Penetrate plug in coiled tubing termination, wild card drawbench is arranged on continuous-tube termination; Hang on external slips drawbench with crane and carry coiled tubing, after making that coiled tubing sufficient length is put forward in slips unfreezing also, by coiled tubing anti-dress operation window, the preventer successively tripped out, then use instead in injection head continuation and carry coiled tubing, the pipe constantly tripped out is entangled to the cylinder on coild tubing unit simultaneously.
5. one kind with pressurely trips out applications of coiled tubing unit, it is characterized in that, the described applications of coiled tubing unit that trips out with pressure has the operation window (10) be tightly connected in turn, four lock preventers (12), blowout prevention box (13) and injection head (14), the described applications of coiled tubing unit that trips out with pressure also has running tool, blanking plug (9) and wild card drawbench (18) in pipe, described running tool is successively through described operation window (10), described four lock preventers (12), described blowout prevention box (13) and injection head (14), in described pipe, blanking plug (9) is connected on the end of described running tool, in described pipe, blanking plug (9) is for shutoff coiled tubing, when tripping out described coiled tubing, described wild card drawbench (18) is fixed on the end of described coiled tubing, and described wild card drawbench (18) is connected in external motive device.
6. according to claim 5ly with pressurely trip out applications of coiled tubing unit, it is characterized in that, the described applications of coiled tubing unit that trips out with pressure also has guider (20), described guider (20) is connected on one end away from described blowout prevention box (13) of described injection head (14), and described guider (20) is for leading to described coiled tubing.
7. according to claim 5ly with pressurely trip out applications of coiled tubing unit, it is characterized in that, the described applications of coiled tubing unit that trips out with pressure also has the second adapter flange (8), and described second adapter flange (8) is connected between the gate valve (5) of described operation window (10) and oil well mouth.
8. according to claim 5ly with pressurely trip out applications of coiled tubing unit, it is characterized in that, described running tool comprises the first running tool (11) and the second running tool (15), described first running tool (11) is connected with described second running tool (15), and described second running tool (15) extends described injection head (14) outward.
9. with pressurely trip out a coiled tubing process, it is characterized in that, application rights requires that the applications of coiled tubing unit that trips out with pressure according to any one of 5 to 8 carries out tripping out coiled tubing, and the described coiled tubing process that trips out with pressure comprises the following steps:
Step S1: the top christmas tree removing oil well mouth after being closed by the gate valve (5) of oil well mouth, be connected to operation window (10), four lock preventers (12), blowout prevention box (13) and injection head (14) in turn described gate valve (5) again, and utilize running tool will send in coiled tubing with coiled tubing described in shutoff;
Step S2: after coiled tubing described in blanking plug (9) shutoff, described operation window (10), described four lock preventers (12), described blowout prevention box (13) and described injection head (14) are removed in described pipe, and utilize described wild card drawbench (18) to connect the end of described coiled tubing, trip out described coiled tubing by external motive device.
10. according to claim 9ly with pressurely trip out coiled tubing process, it is characterized in that, in the process of described step S2, after described coiled tubing is tripped out preset distance, the described coiled tubing process that trips out with pressure also comprises step S3: remove described wild card drawbench (18), then by described operation window (10), described four lock preventers (12), described blowout prevention box (13) and described injection head (14) are connected in turn on the work package being set on described coiled tubing at oil well mouth place, described coiled tubing is through described operation window (10), described four lock preventers (12), tripped out by described external motive device after described blowout prevention box (13) and described injection head (14).
11. according to claim 10ly with pressurely trip out coiled tubing process, it is characterized in that, in the process of described step S2, described gate valve (5) is removed, and first adapter flange (4) of described work package is removed, more described operation window (10) is connected on the hanger (3) of described work package.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510220101.4A CN105089524B (en) | 2014-05-14 | 2015-05-01 | Device and process method for lifting coiled tubing out under pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410204614 | 2014-05-14 | ||
| CN2014102046141 | 2014-05-14 | ||
| CN201510220101.4A CN105089524B (en) | 2014-05-14 | 2015-05-01 | Device and process method for lifting coiled tubing out under pressure |
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| Publication Number | Publication Date |
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| CN105089524A true CN105089524A (en) | 2015-11-25 |
| CN105089524B CN105089524B (en) | 2017-08-04 |
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| CN201510220101.4A Active CN105089524B (en) | 2014-05-14 | 2015-05-01 | Device and process method for lifting coiled tubing out under pressure |
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| CN112302558A (en) * | 2019-07-30 | 2021-02-02 | 中国石油化工股份有限公司 | Wellhead suspension device suitable for small-diameter coiled tubing operation |
| CN113047795A (en) * | 2019-12-27 | 2021-06-29 | 中国石油天然气股份有限公司 | Method for pressing reducing oil pipe string |
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|---|---|---|---|---|
| CN112302558A (en) * | 2019-07-30 | 2021-02-02 | 中国石油化工股份有限公司 | Wellhead suspension device suitable for small-diameter coiled tubing operation |
| CN112302558B (en) * | 2019-07-30 | 2022-04-01 | 中国石油化工股份有限公司 | Wellhead suspension device suitable for small-diameter coiled tubing operation |
| CN113047795A (en) * | 2019-12-27 | 2021-06-29 | 中国石油天然气股份有限公司 | Method for pressing reducing oil pipe string |
| CN113047795B (en) * | 2019-12-27 | 2022-07-05 | 中国石油天然气股份有限公司 | Method for pressing reducing oil pipe string |
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|---|---|
| CN105089524B (en) | 2017-08-04 |
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