CN113027338B - Simple small pressure difference testing device with well drilling, well completion and gas testing functions - Google Patents
Simple small pressure difference testing device with well drilling, well completion and gas testing functions Download PDFInfo
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- CN113027338B CN113027338B CN202110195934.5A CN202110195934A CN113027338B CN 113027338 B CN113027338 B CN 113027338B CN 202110195934 A CN202110195934 A CN 202110195934A CN 113027338 B CN113027338 B CN 113027338B
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- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 238000005553 drilling Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 302
- 238000002347 injection Methods 0.000 claims abstract description 176
- 239000007924 injection Substances 0.000 claims abstract description 176
- 239000004576 sand Substances 0.000 claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 claims abstract description 28
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 124
- 241001449342 Chlorocrambe hastata Species 0.000 claims description 38
- 239000000725 suspension Substances 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 22
- 239000007789 gas Substances 0.000 abstract description 24
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 abstract description 5
- 238000011156 evaluation Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 3
- 239000013535 sea water Substances 0.000 description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 150000004677 hydrates Chemical class 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/12—Underwater drilling
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Geophysics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a simple small pressure difference testing device with well drilling, well completion and gas testing functions, which comprises a drill rod, a first salvageable variable flow passage pipe column, a second salvageable variable flow passage pipe column, a third salvageable variable flow passage pipe column and a fourth salvageable variable flow passage pipe column, as well as an upper pipe external water injection expansion packer, a sand control screen pipe, a lower pipe external water injection expansion packer, a one-way floating valve and a drill bit which are fixedly arranged on the drill rod from top to bottom along the axial direction of the drill rod, wherein one of the first salvageable variable flow passage pipe column, the second salvageable variable flow passage pipe column, the third salvageable variable flow passage pipe column and the fourth salvageable variable flow passage pipe column is suspended in a cavity of the drill rod, and one of the salvageable variable flow passage pipe columns is suspended in the cavity so that drilling fluid in the cavity of the salvageable variable flow passage pipe column flows into different parts after flowing into the cavity of the drill rod from different positions. The invention realizes the quick switching of three working conditions of drilling hole forming, pressing setting and pressure reduction gas production, and the evaluation of the natural gas hydrate energy storage small pressure difference test is easily realized.
Description
Technical Field
The invention relates to the technical field of hydrate exploitation devices, in particular to a simple small pressure difference testing device with functions of well drilling, well completion and gas testing, and does not relate to the technical field of well control and well abandoning in the subsequent deep sea gas testing process.
Background
The natural gas hydrate pilot production and production well downhole operation comprises a plurality of operation stages of well drilling and well building, well completion reservoir transformation and sand prevention, artificial lifting and pressure reduction testing and the like. The method is an integrated resource energy storage small pressure difference simple test evaluation method with the functions of well drilling, well completion and gas testing in consideration of the characteristics that a natural gas hydrate reservoir is basically located in a seabed sedimentary layer, the stratum is not consolidated, a vertical well is easy to form a hole when drilling, and the torque of a pipe column is low, and from the angle of carrying out new block resource evaluation tests in a large scale in the future natural gas hydrate industrialization. The change of the flow channel under different working conditions is conveniently and quickly completed, the functions of drilling, well completion and gas testing are realized by one drill, the operation efficiency is improved, and the cost of resource exploration and energy storage test evaluation after the industrialization of the natural gas hydrate in the future is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a simple small pressure difference measuring device with the functions of drilling, well completion and gas testing, which can solve the problem of realizing the functions of drilling, well completion and gas testing at one time under the condition of conveniently and quickly switching different working conditions.
The technical scheme for realizing the purpose of the invention is as follows: a simple small pressure difference testing device with well drilling, well completion and gas testing functions comprises a drill rod and a salvageable variable flow passage pipe column group, wherein the salvageable variable flow passage pipe column group comprises a first salvageable variable flow passage pipe column, a second salvageable variable flow passage pipe column, a third salvageable variable flow passage pipe column, a fourth salvageable variable flow passage pipe column, an upper pipe outer water injection expansion packer, a sand control screen pipe, a lower pipe outer water injection expansion packer, a one-way floating valve and a drill bit which are sequentially and fixedly arranged on the drill rod along the axial direction of the drill rod from top to bottom,
a first salvageable variable flow passage pipe column, a second salvageable variable flow passage pipe column, a third salvageable variable flow passage pipe column and a fourth salvageable variable flow passage pipe column are detachably suspended in the cavity of the drill rod,
the salvageable variable flow passage pipe column capable of being salvaged in one of the variable flow passage pipe column groups is installed in the cavity in a hanging mode and used for entering drilling fluid in the salvageable variable flow passage pipe column cavity into the drill pipe cavity from different positions in different stages of test production operation, the drilling fluid flows into the outer water injection expansion packer of the upper pipe or the sand control screen pipe or the outer water injection expansion packer of the lower pipe correspondingly, and the outer water injection expansion packer of the upper pipe and the outer water injection expansion packer of the lower pipe expand in a water injection mode.
Further, the outer water injection inflation packer of upper tube includes first water injection check valve, first packer parent tube and first water injection inflation rubber, and first water injection check valve transversely installs on first packer parent tube to make the drilling fluid in the drilling rod cavity can pour into first water injection inflation rubber through first water injection check valve, first water injection inflation rubber sets up along first packer parent tube axial.
Further, the sand control screen comprises a perforated base pipe and a sand control medium, wherein the sand control medium is filled in the perforated base pipe, and the sand control screen allows liquid and oil gas to pass through.
Further, the outer water injection expansion packer of lower tube includes second water injection check valve, second packer parent tube and second water injection expansion rubber, and the second water injection check valve is transversely installed on the second packer parent tube to make the drilling fluid in the drilling rod cavity can flow into in the second water injection expansion rubber through the second water injection check valve, second water injection expansion rubber sets up along second packer parent tube axial.
Further, the one-way float valve is positioned above the drill bit.
Further, the drill bit is located at the lowermost end of the drill rod.
Further, the first salvageable variable flow passage pipe column comprises a first fishing spearhead, a first pipe column and a first water passing channel, the first fishing spearhead is fixedly connected with the first pipe column, the first fishing spearhead is positioned at the upper end of the first pipe column, the first water passing channel extends in parallel along the axial direction of the first pipe column, the first salvageable variable flow passage pipe column further comprises a first water inlet channel, a first suspension ring, a first upper sealing element, a first lower sealing element and a first water outlet which are sequentially arranged along the axial direction of the first pipe column from top to bottom,
the first water inlet channel is used for guiding drilling fluid in the drill rod to a first water passing channel in the first pipe column, the first suspension ring is used for suspension mounting of the first salvageable variable flow passage pipe column in a cavity of the drill rod, the first upper sealing element, the first lower sealing element and the first water outlet are sequentially and respectively mounted at the upper end and the lower end of the first pipe column, so that when the first salvageable variable flow passage pipe column is suspension mounted in the cavity of the drill rod, the first upper sealing element is located above the upper pipe outer water injection expansion packer, the second sealing element is located below the lower pipe outer water injection expansion packer, and the first water outlet is located below the lower pipe outer water injection expansion packer.
Further, the second salvageable variable flow passage pipe column comprises a second fishing spearhead, a second pipe column and a second water passing channel, the second fishing spearhead is fixedly connected with the second pipe column, the second fishing spearhead is positioned at the upper end of the second pipe column, the second water passing channel extends in parallel along the axial direction of the second pipe column, the second fishing variable flow passage pipe column further comprises a second water inlet channel, a second suspension ring, a second upper sealing element, a second middle sealing element, a second water outlet, a second middle lower sealing element and a second lower sealing element which are sequentially arranged along the axial direction of the second pipe column from top to bottom,
the second water inlet channel is used for guiding liquid in the drill rod into a second water passing channel in a second pipe column, the second suspension ring is used for suspending and installing the second salvageable variable-flow-channel pipe column in a cavity of the drill rod, the second upper sealing element, the second middle sealing element, the second water outlet, the second middle lower sealing element and the second lower sealing element are sequentially and respectively installed at the upper end, the middle lower end and the lower end of the second pipe column, so that when the second salvageable variable-flow-channel pipe column is suspended and installed in the cavity of the drill rod, the second upper sealing element is positioned above the upper pipe outer water injection expansion packer, the second middle sealing element is positioned between the upper pipe outer water injection expansion packer and the sand control screen pipe, the second water outlet is positioned in the area where the sand control screen pipe is located, the second water outlet faces the sand control screen pipe, the second middle lower sealing element is positioned between the sand control screen pipe outer water injection expansion packer and the lower pipe outer water injection expansion packer, and the second lower sealing element is positioned below the lower pipe outer water injection expansion packer.
Further, the third salvageable variable flow passage pipe column comprises a third fishing spear head, a third pipe column and a third water passing channel, the third fishing spear head is fixedly connected with the third pipe column, the third fishing spear head is positioned at the upper end of the third pipe column, the third water passing channel extends in parallel along the axial direction of the third pipe column, and the third fishing variable flow passage pipe column further comprises a third water passing channel, a third suspension ring, a third upper sealing element, a third middle lower sealing element, a third water outlet and a third lower sealing element which are sequentially arranged along the axial direction of the third pipe column from top to bottom,
the third water inlet channel is used for guiding liquid in the drill rod into a third water passage in a third pipe column, the third suspension ring is used for suspending and installing a third salvageable variable flow passage pipe column in a cavity of the drill rod, and the third upper sealing element, the third middle lower sealing element, the third water outlet and the third lower sealing element are sequentially and respectively installed at the upper end, the middle lower end and the lower end of the third pipe column, so that when the third salvageable variable flow passage pipe column is suspended and installed in the cavity of the drill rod, the third upper sealing element is positioned above the upper pipe outer water injection expansion packer, the third middle sealing element is positioned between the upper pipe outer water injection expansion packer and the sand control screen pipe, the third middle lower sealing element is positioned between the sand control screen pipe and the lower pipe outer water injection expansion packer, the third water outlet is positioned in the area where the lower pipe outer water injection expansion packer is positioned, so that the liquid in the drill rod can enter the lower pipe outer water injection expansion packer, and the third lower sealing element is positioned below the lower pipe outer water injection expansion packer.
Furthermore, the fourth salvageable variable flow passage pipe column comprises a fourth fishing spearhead, a fourth pipe column and a fourth water passing channel, the fourth fishing spearhead is fixedly connected with the fourth pipe column, the fourth fishing spearhead is positioned at the upper end of the fourth pipe column, the fourth water passing channel extends in parallel along the axial direction of the fourth pipe column, and the fourth fishing variable flow passage pipe column further comprises a fourth water inlet channel, a fourth suspension ring, a fourth upper sealing element, a fourth water outlet and a fourth lower sealing element which are sequentially arranged along the axial direction of the fourth pipe column from top to bottom,
the fourth water inlet channel is used for enabling liquid in the drill rod to flow into a fourth water inlet channel in a fourth pipe column, the fourth suspension ring is used for installing the fourth salvageable variable-flow-channel pipe column in a cavity of the drill rod in a suspension mode, the fourth upper sealing element, the fourth water outlet and the fourth lower sealing element are sequentially and respectively installed at the upper end and the middle end and the lower end of the first pipe column, so that when the fourth salvageable variable-flow-channel pipe column is installed in the cavity of the drill rod in a suspension mode, the fourth upper sealing element is located above the upper pipe outer water injection expansion packer, the fourth water outlet is located in the area where the upper pipe outer water injection expansion packer is located, the liquid in the drill rod can enter the upper pipe outer water injection expansion packer, and the fourth lower sealing element is located below the lower pipe outer water injection expansion packer.
The invention has the beneficial effects that: the invention realizes the quick switching of three working conditions of drilling hole forming, pressing setting and depressurization gas production, realizes the integrated simple trial production of hydrate drilling and production and greatly improves the efficiency and the safety of the hydrate drilling and production operation.
Drawings
FIG. 1 is a schematic structural view of a salvageable variable flow passage string not being dropped on a drill pipe;
FIG. 2 is a schematic structural view of a first salvageable variable flow passage string;
FIG. 3 is a schematic structural view of a second salvageable variable flow string;
FIG. 4 is a schematic structural view of a third salvageable variable flow string;
FIG. 5 is a schematic structural view of a fourth salvageable variable flow string;
FIG. 6 is a schematic structural view of a first salvageable variable flow passage tubular string being dropped onto a drill pipe;
FIG. 7 is a schematic view of a drill pipe drilling state with a first salvageable variable flow string launched;
FIG. 8 is a schematic view of a drilling hole formation state with evacuation of the first salvageable variable flow path string after drilling is completed;
FIG. 9 is a schematic view showing a state in which a second salvageable variable flow passage string is dropped to clean a sand control screen;
FIG. 10 is a schematic view of the completed cleaning of the sand control screen and removal of the second salvageable variable flow string;
FIG. 11 is a schematic view showing a state in which a third salvageable variable flow passage tubular column is thrown to set an outer water injection expansion packer of a lower pipe;
FIG. 12 is a schematic view of the completion of setting of the water injection and expansion packer outside the lower pipe and evacuation of the third salvageable variable flow passage string;
FIG. 13 is a schematic view of a state in which a fourth salvageable variable flow passage string is thrown to set an outer water injection swelling packer of an upper pipe;
FIG. 14 is a schematic view of the completion of setting the water injection inflatable packer outside the upper pipe and the evacuation of the fourth salvageable variable flow path string;
FIG. 15 is a schematic diagram of coiled tubing placement and monitoring/heating pipeline for gas lift induced flow test production and monitoring of temperature and pressure.
In the figure, the position of the upper end of the main shaft, 1-drill pipe, 2-upper pipe external water injection expansion packer, 21-first water injection one-way valve, 22-first water injection expansion rubber sheet, 3-sand control screen pipe, 31-perforated base pipe, 32-sand control medium, 4-lower pipe external water injection expansion packer, 41-second water injection one-way valve, 42-second water injection expansion rubber sheet, 5-one-way float valve, 6-drill bit, 7-first salvageable variable flow passage pipe column, 71-first fishing spearhead, 72-first water inlet channel, 73-first suspension ring, 74-first upper sealing element, 75-first water passage, 76-first pipe column, 77-first lower sealing element, 78-first water outlet, 8-second salvageable variable flow passage pipe column, 81-second fishing spearhead, 82-second water inlet channel, 83-second suspension ring, 84-second upper sealing element, 85-second middle sealing element, 86-second water passage, 87-second water outlet channel, 88-second fishing spearhead, 89-third middle sealing element, 99-third middle sealing element, 93-third middle sealing element, 99-third fishing spearhead, 93-fourth middle sealing element, 99-second water outlet channel, 3-fourth fishing spearhead, and fourth middle sealing element, 103-a fourth suspension ring, 104-a fourth upper sealing element, 105-a fourth water outlet, 106-a fourth water channel, 107-a fourth lower sealing element.
Detailed description of the preferred embodiments
The invention is further described with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1 and 15, a simple small pressure difference testing device with well drilling, well completion and gas testing functions comprises a drill rod 1, a first salvageable variable flow passage pipe column 7, a second salvageable variable flow passage pipe column 8, a third salvageable variable flow passage pipe column 9, a fourth salvageable variable flow passage pipe column 10, an upper pipe external water injection expansion packer 2 fixedly installed on the drill rod 1, a sand control screen pipe 3, a lower pipe external water injection expansion packer 4, a one-way float valve 5 and a drill bit 6, the upper pipe external water injection expansion packer 2, the sand control screen pipe 3, the lower pipe external water injection expansion packer 4, the one-way float valve 5 and the drill bit 6 are sequentially and fixedly installed on the drill rod 1 from top to bottom along the axial direction of the drill rod 1. The first salvageable variable flow passage pipe column 7, the second salvageable variable flow passage pipe column 8, the third salvageable variable flow passage pipe column 9 and the fourth salvageable variable flow passage pipe column 10 are detachably suspended in the cavity of the drill rod 1. When trial production test operation is required, one of the salvageable variable flow passage pipe columns is hung in the cavity so as to correspond to different stages of trial production test operation, and different salvageable variable flow passage pipe columns are used for different stages of trial production test operation. When the current stage is switched to the next stage, the current salvageable variable flow passage pipe column is taken out of the drill rod 1 and the next salvageable variable flow passage pipe column is put in, so that the requirement of fast switching operation among different working conditions can be met.
The upper pipe external water injection expansion packer 2 comprises a first water injection check valve 21, a first packer base pipe (not shown in the figure) and a first water injection expansion rubber 22, the first water injection check valve 21 is transversely installed on the first packer base pipe, and the first packer base pipe is installed in the drill pipe 1, so that seawater in the cavity of the drill pipe 1 can flow into the first water injection expansion rubber 22 through the first water injection check valve 21, namely the flow direction of the first water injection check valve 21 is from the cavity of the drill pipe 1 to the first water injection expansion rubber 22. First water injection inflation rubber 22 sets up along first packer parent tube axial, and first water injection inflation rubber 22 water injection inflation, the regional isolation that carries out above the first water injection inflation rubber 22 after the inflation will go up the outer water injection inflation packer 2 of upper tube to prevent that the sea water and the air current in the outer water injection inflation packer 2 top of upper tube region from getting into the below of the outer water injection inflation packer 2 of upper tube, reach the setting effect.
The sand control screen 3 comprises a perforated base pipe 31 and sand control media 32, the sand control media 32 is packed in the belt Kong Jiguan, and the sand control media 32 can adopt gravel or other solid particle media. The perforated base pipe 31 filled with the sand control medium 32 can still pass through the air flow and the seawater due to the gaps still existing between the sand control medium 32.
The lower pipe external water injection expansion packer 4 comprises a second water injection check valve 41, a second packer base pipe (not shown in the figure, the hatching part is that you can complement) and a second water injection expansion rubber 42, the second water injection check valve 41 is transversely installed on the second packer base pipe, and the second packer base pipe is installed in the drill pipe 1, so that seawater in the cavity of the drill pipe 1 can flow into the second water injection expansion rubber 42 through the second water injection check valve 41, that is, the flow direction of the second water injection check valve 41 is from the cavity of the drill pipe 1 to the second water injection expansion rubber 42. The second water injection expansion rubber 42 is axially arranged along the base pipe of the second packer, the second water injection expansion rubber 42 is expanded by water injection, namely, the water injection punching expansion in the cavity of the second water injection expansion rubber 42 is realized, the expanded second water injection expansion rubber 42 carries out sealing isolation on the area above the upper pipe outer water injection expansion packer 2 so as to prevent seawater and airflow in the area below the lower pipe outer water injection expansion packer 4 from entering the upper part of the lower pipe outer water injection expansion packer 4, and the setting effect is achieved.
After the upper pipe external water injection expansion packer 2 and the lower pipe external water injection expansion packer 4 are completely sealed, a sealing area is formed in an area between the upper pipe external water injection expansion packer 2 and the lower pipe external water injection expansion packer 4, external seawater and airflow cannot directly enter the sealing area and can only enter the sealing area through the sand control screen pipe 3, so that a small-pressure-difference pressure-reduction gas production test can be performed on hydrates in the area, the purpose of performing trial production test operation on the hydrates is achieved, and a solid foundation is laid for subsequent large-scale production of the hydrates.
The one-way float valve 5 is positioned below the cavity of the drill rod 1 and used for preventing seawater below the drill bit 6 from penetrating into the cavity of the drill rod 1 and only allowing the seawater in the cavity of the drill rod 1 to be discharged out of the drill rod 1 through the one-way float valve 5.
The drill bit 6 is fixedly arranged at the lowest end (namely the tail end) of the drill rod 1, and the drill bit 6 is used for drilling a working area (namely a test area to be trial-mined) so as to achieve the purpose of drilling and forming holes.
The first salvageable variable flow pipe column 7 comprises a first fishing spearhead 71, a first pipe column 76 and a first water passing channel 75, wherein the first fishing spearhead 71 is fixedly connected to the upper end of the first pipe column 76, the first water passing channel 75 extends in parallel along the axial direction of the first pipe column 76, and the first fishing spearhead further comprises a first water inlet channel 72, a first suspension ring 73, a first upper sealing element 74, a first lower sealing element 77 and a first water outlet 78 which are sequentially arranged from top to bottom along the axial direction of the first pipe column 76. The first water inlet channel 72 enables liquid to flow into a first water passing channel 75 in the first pipe column 76, and the first suspension ring 73 is used for suspension mounting the first salvageable variable flow passage pipe column 7 in the cavity of the drill rod 1, so that the first salvageable variable flow passage pipe column 7 can be detachably mounted on the drill rod 1. The first upper sealing element 74, the first lower sealing element 77 and the first water outlet 78 are sequentially and respectively installed at the upper end, the lower end and the tail end of the first pipe string 76, so that when the first salvageable variable flow passage pipe string 7 is installed in a cavity of the drill rod 1 in a hanging mode, the first upper sealing element 74 is located above the upper pipe outer water injection expansion packer 2, the second sealing element is located below the lower pipe outer water injection expansion packer 4, and the first water outlet 78 is located below the lower pipe outer water injection expansion packer 4. So that the liquid enters the cavity of the drill rod 1, flows into the first water inlet channel 75 from the first water inlet channel 72, and finally flows out from the first water outlet 78. Namely, the drilling fluid entering the drill pipe 1 enters the cavity of the first salvageable variable flow passage pipe column 7 and then is discharged from the area below the water injection expansion packer 4 positioned outside the lower pipe. Seawater does not flow into the upper pipe outer water injection expansion packer 2 and the lower pipe outer water injection expansion packer 4, so that drilling pore-forming operation can be performed.
It is noted that during the drilling phase, the fluid is called drilling fluid, while during other operation phases it is called fluid.
After the drilling and pore-forming operation is completed, the first salvageable variable flow passage pipe column 7 is taken out of the drill rod 1, and the second salvageable variable flow passage pipe column 8 is put into the drill rod for the next-stage operation.
The second salvageable variable flow passage pipe column 8 comprises a second fishing spearhead 81, a second pipe column 88 and a second water passing channel 86, the second fishing spearhead 81 is fixedly connected to the upper end of the second pipe column 88, the second water passing channel 86 extends in parallel along the axial direction of the second pipe column 88, and the second fishing variable flow passage pipe column further comprises a second water inlet channel 82, a second suspension ring 83, a second upper sealing element 84, a second middle sealing element 85, a second water outlet 87, a second middle lower sealing element 89 and a second lower sealing element 810 which are sequentially arranged along the axial direction of the second pipe column 88 from top to bottom. The second water inlet channel 82 enables liquid in the drill rod to flow into a second water outlet channel 86 in a second tubular column 88, and the second suspension ring 83 is used for suspending and installing the second salvageable variable flow passage tubular column 8 in the cavity of the drill rod 1, so that the second salvageable variable flow passage tubular column 8 can be detachably installed on the drill rod 1. The second upper sealing element 84, the second middle sealing element 85, the second water outlet 87, the second middle lower sealing element 89 and the second lower sealing element 810 are sequentially and respectively installed at the upper end, the middle lower end and the lower end of the second pipe column 88, so that when the second salvageable variable flow passage pipe column 8 is installed in the cavity of the drill rod 1 in a hanging mode, the second upper sealing element 84 is located above the upper pipe outer water injection expansion packer 2, the second middle sealing element 85 is located between the upper pipe outer water injection expansion packer 2 and the sand control screen pipe 3, the second water outlet 87 is located in the area where the sand control screen pipe 3 is located, the second water outlet 87 faces the sand control screen pipe 3, the second middle lower sealing element 89 is located between the sand control screen pipe 3 and the lower pipe outer water injection expansion packer 4, and the second lower sealing element 810 is located below the lower pipe outer water injection expansion packer 4. Therefore, after liquid enters the cavity of the drill rod 1, the liquid flows into the second water passing channel 86 from the second water inlet channel 82 and then flows out from the second water outlet 87, seawater flowing out from the second water outlet 87 flows into the sand control screen pipe 3, the sand control screen pipe 3 is cleaned and discharged, and the mud on the sand control screen pipe 3 is flushed by positive pressure to remove blockage, so that sand in an external stratum can be prevented from blocking the sand control screen pipe 3. The sand screen 3 allows fluids to pass with the hydrocarbons while blocking the inflow of formation sand. The seawater still cannot flow into the upper pipe external water injection expansion packer 2 and the lower pipe external water injection expansion packer 4.
After the sand control screen 3 is washed and unblocked to prevent formation sand from blocking the sand control screen 3, the second salvageable variable flow pipe column 8 is taken out of the drill rod 1 and a third salvageable variable flow pipe column 9 is put in for next-stage operation.
The third salvageable variable flow pipe column 9 comprises a third fishing spearhead 91, a third pipe column 98 and a third water passing channel 95, the third fishing spearhead 91 is fixedly connected to the upper end of the third pipe column 98, the third water passing channel 95 extends in parallel along the axial direction of the third pipe column 98, and the third salvageable variable flow pipe column further comprises a third water inlet channel 92, a third suspension ring 93, a third upper sealing element 94, a third middle sealing element 96, a third middle lower sealing element 97, a third water outlet 99 and a third lower sealing element 910 which are sequentially arranged along the axial direction of the third pipe column 98 from top to bottom. The third water inlet channel 92 can enable liquid in the drill rod to flow into a third water inlet channel 95 in a third pipe column 98, and the third suspension ring 93 is used for suspending and installing the third salvageable variable flow passage pipe column 9 in the cavity of the drill rod 1, so that the third salvageable variable flow passage pipe column 9 can be detachably installed on the drill rod 1. The third upper sealing element 94, the third middle sealing element 96, the third middle lower sealing element 97, the third water outlet 99 and the third lower sealing element 910 are sequentially and respectively installed at the upper end, the middle lower end and the lower end of the third pipe string 98, so that when the third salvageable variable flow passage pipe string 9 is installed in the cavity of the drill rod 1 in a hanging manner, the third upper sealing element 94 is positioned above the upper pipe outer water injection expansion packer 2, the third middle sealing element 96 is positioned between the upper pipe outer water injection expansion packer 2 and the sand control screen pipe 3, the third middle lower sealing element 97 is positioned between the sand control screen pipe 3 and the lower pipe outer water injection expansion packer 4, the third water outlet 99 is positioned in the area where the lower pipe outer water injection expansion packer 4 is positioned, the third water outlet 99 faces the lower pipe outer water injection expansion packer 4, seawater in the third water passage 95 can enter the lower pipe outer water injection expansion packer 4, and the third lower sealing element 910 is positioned below the lower pipe outer water injection expansion packer 4. Thereby make liquid flow into in the third water channel 95 from third inlet channel 92 behind getting into the drilling rod 1 cavity, then flow out from third delivery port 99, the sea water that flows out from third delivery port 99 flows into in the outer water injection inflation packer 4 of low tube, the outer water injection inflation packer 4 water injection inflation of low tube to seal the isolation with the below of the outer water injection inflation packer 4 of low tube, prevent that sea water and the air of below from getting into the upper region of the outer water injection inflation packer 4 of low tube, accomplish the setting to outer water injection inflation packer 4 of low tube this moment.
And after the setting of the water injection expansion packer 4 outside the lower pipe is finished, taking the third salvageable variable flow passage pipe column 9 out of the drill pipe 1, and putting the fourth salvageable variable flow passage pipe column 10 into the drill pipe for the next-stage operation.
The fourth salvageable variable flow passage pipe column 10 comprises a fourth fishing spearhead 101, a fourth pipe column and a fourth water passing channel 106, the fourth fishing spearhead 101 is fixedly connected to the upper end of the fourth pipe column, the fourth water passing channel 106 extends in parallel along the axial direction of the fourth pipe column, and the fourth salvageable variable flow passage pipe column further comprises a fourth water inlet channel 102, a fourth suspension ring 103, a fourth upper sealing element 104, a fourth water outlet 105 and a fourth lower sealing element 107 which are sequentially arranged along the axial direction of the fourth pipe column from top to bottom. The fourth water inlet channel 102 enables liquid in the drill rod to flow into a fourth water inlet channel 106 in a fourth pipe column, and the fourth suspension ring 103 is used for suspending and installing the fourth salvageable variable flow passage pipe column 10 in the cavity of the drill rod 1, so that the fourth salvageable variable flow passage pipe column 10 can be detachably installed on the drill rod 1. A fourth upper sealing element 104, a fourth water outlet 105 and a fourth lower sealing element 107 are sequentially and respectively installed at the upper end, the middle end and the lower end of the first pipe column 76, so that when the fourth salvageable variable flow passage pipe column 10 is installed in a cavity of the drill rod 1 in a hanging mode, the fourth upper sealing element 104 is located above the upper pipe outer water injection expansion packer 2, the fourth water outlet 105 is located in the area where the upper pipe outer water injection expansion packer 2 is located, the fourth water outlet 105 faces the upper pipe outer water injection expansion packer 2, seawater in the fourth water passage 106 can enter the upper pipe outer water injection expansion packer 2, and the fourth lower sealing element 107 is located below the lower pipe outer water injection expansion packer 4. So that the liquid flows into the fourth water passage 106 from the fourth water inlet channel 102 after entering the cavity of the drill rod 1, then flows out from the fourth water outlet 105, and the seawater flowing out from the fourth water outlet 105 enters the water injection expansion packer 2 outside the upper pipe. The water injection expansion packer 2 outside the upper pipe is injected with water for expansion, so that the upper area of the water injection expansion packer 2 outside the upper pipe is sealed and isolated, the seawater above the upper area is prevented from entering the lower area of the water injection expansion packer 2 outside the upper pipe, and the setting of the water injection expansion packer 2 outside the upper pipe is completed at the moment. And in combination with setting of the lower pipe outer water injection expansion packer 4, a sealing area is formed in an area between the upper pipe outer water injection expansion packer 2 and the lower pipe outer water injection expansion packer 4, the area is just positioned in a hydrate layer containing hydrate, and subsequent small-pressure-difference pressure-reduction gas production test operation can be performed on the hydrate.
Therefore, all the preliminary preparation of the pilot production test is completed, the condition of the pilot production test operation is met, and the subsequent small-pressure-difference pressure-reducing gas production test operation can be carried out.
After the setting of the upper pipe external water injection expansion packer is completed, the fourth salvageable variable flow passage pipe column is taken out, a coiled tubing and a monitoring/heating pipeline are put into the cavity of the drill rod, a temperature monitor for measuring temperature and pressure is fixedly installed on the monitoring/heating pipeline, and the coiled tubing is used for testing the small pressure difference pressure reduction gas production of the hydrate. Before formal small-pressure-difference pressure-reduction gas production test operation, gas, preferably nitrogen, is injected into the cavity of the drill rod, and after the nitrogen is injected into the sealing area, a induced-flow gas production test is performed. And after the nitrogen flows into the cavity, the nitrogen flows into the sealing area through the sand control screen pipe on the drill rod, namely flows into the hydrate layer, namely injects gas into the hydrate layer to form negative pressure, and thus the sealing area forms a sealing negative pressure area. After negative pressure is formed, the hydrate in the sealed negative pressure area is subjected to small-pressure-difference pressure reduction gas production test to complete trial production test operation, and in the process, the temperature and pressure conditions in the device can be monitored in real time through a temperature monitor so as to guide operation.
After the device and the corresponding operation, the quick switching under three working conditions of drilling hole forming, pressing setting and depressurization gas production can be realized, the simple small pressure difference test pilot production of the integration of hydrate drilling and production is realized, and the efficiency and the safety of the hydrate drilling and production operation are greatly improved.
It should be noted that, during actual operation, the drilling operation, the cleaning and plugging removal operation of the sand control screen pipe, the water injection expansion of the upper pipe outer water injection expansion packer and the water injection expansion of the lower pipe outer water injection expansion packer can be separated according to actual conditions, and one of the operations can be selected to be operated independently or combined together. For example, the drilling operation is carried out independently and the cleaning and plugging removal operation of the sand control screen pipe is not carried out, or the outer upper pipe water injection expansion packer is separately injected with water for expansion, and the outer lower pipe water injection expansion packer is not injected with water but is not injected with water for expansion.
The embodiments disclosed in this description are only an exemplification of the single-sided characteristics of the invention, and the scope of protection of the invention is not limited to these embodiments, and any other functionally equivalent embodiments fall within the scope of protection of the invention. Various other changes and modifications to the above-described embodiments and concepts will become apparent to those skilled in the art from the above description, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (4)
1. A simple small pressure difference testing device with the functions of well drilling, well completion and gas testing is characterized by comprising a drill rod and a salvageable variable flow passage pipe column set, wherein the salvageable variable flow passage pipe column set comprises a first salvageable variable flow passage pipe column, a second salvageable variable flow passage pipe column, a third salvageable variable flow passage pipe column and a fourth salvageable variable flow passage pipe column, an upper pipe external water injection expansion packer, a sand control screen pipe, a lower pipe external water injection expansion packer, a one-way floating valve and a drill bit which are sequentially and fixedly arranged on the drill rod along the axial direction of the drill rod from top to bottom,
a first salvageable variable flow passage pipe column, a second salvageable variable flow passage pipe column, a third salvageable variable flow passage pipe column and a fourth salvageable variable flow passage pipe column are detachably suspended in the cavity of the drill rod,
the salvageable variable flow passage pipe column in one of the salvageable variable flow passage pipe column groups is suspended and installed in the cavity and used for enabling the drilling fluid entering the cavity of the salvageable variable flow passage pipe column to flow into the drill pipe cavity from different positions at different stages of the pilot production testing operation and correspondingly flow into the upper pipe external water injection expansion packer or the sand control screen pipe or the lower pipe external water injection expansion packer, the upper pipe external water injection expansion packer and the lower pipe external water injection expansion packer are subjected to water injection expansion,
the upper pipe external water injection expansion packer comprises a first water injection one-way valve, a first packer base pipe and a first water injection expansion rubber sheet, wherein the first water injection one-way valve is transversely arranged on the first packer base pipe so that drilling fluid in the drill rod cavity can be injected into the first water injection expansion rubber sheet through the first water injection one-way valve, the first water injection expansion rubber sheet is axially arranged along the first packer base pipe,
the sand control screen pipe comprises a base pipe with holes and a sand control medium, the sand control medium is filled in the base pipe with the holes, the sand control screen pipe allows liquid and oil gas to pass through,
the lower pipe external water injection expansion packer comprises a second water injection one-way valve, a second packer base pipe and a second water injection expansion rubber sheet, the second water injection one-way valve is transversely arranged on the second packer base pipe so that drilling fluid in the drill rod cavity can flow into the second water injection expansion rubber sheet through the second water injection one-way valve, and the second water injection expansion rubber sheet is axially arranged along the second packer base pipe,
the one-way float valve is positioned above the drill bit,
the drill bit is located at the lowermost end of the drill rod,
the first salvageable variable flow passage pipe column comprises a first salvageable spearhead, a first pipe column and a first water passing channel, the first salvageable spearhead is fixedly connected with the first pipe column, the first salvageable spearhead is positioned at the upper end of the first pipe column, the first water passing channel extends in parallel along the axial direction of the first pipe column, the first salvageable variable flow passage pipe column further comprises a first water inlet channel, a first suspension ring, a first upper sealing element, a first lower sealing element and a first water outlet which are sequentially arranged along the axial direction of the first pipe column from top to bottom,
the first water inlet channel is used for guiding drilling liquid in the drill rod into a first water passing channel in the first pipe column, the first suspension ring is used for suspending and installing a first salvageable variable flow channel pipe column in a cavity of the drill rod, the first upper sealing element, the first lower sealing element and the first water outlet are sequentially and respectively installed at the upper end and the lower end of the first pipe column, so that when the first salvageable variable flow channel pipe column is suspended and installed in the cavity of the drill rod, the first upper sealing element is located above the outer upper pipe water injection expansion packer, the second sealing element is located below the outer lower pipe water injection expansion packer, and the first water outlet is located below the outer lower pipe water injection expansion packer.
2. The simple small pressure difference testing device with the functions of drilling, completing and testing gas as claimed in claim 1, wherein the second salvageable variable flow passage string comprises a second fishing spear head, a second string and a second water passage, the second fishing spear head is fixedly connected with the second string, the second fishing spear head is located at the upper end of the second string, the second water passage extends in parallel along the axial direction of the second string, and the simple small pressure difference testing device further comprises a second water inlet passage, a second suspension ring, a second upper sealing element, a second middle sealing element, a second water outlet, a second middle lower sealing element and a second lower sealing element which are sequentially installed along the axial direction of the second string from top to bottom,
the second water inlet channel is used for guiding liquid in the drill rod into a second water passing channel in a second pipe column, the second suspension ring is used for suspending and installing the second salvageable variable-flow-channel pipe column in a cavity of the drill rod, the second upper sealing element, the second middle sealing element, the second water outlet, the second middle lower sealing element and the second lower sealing element are sequentially and respectively installed at the upper end, the middle lower end and the lower end of the second pipe column, so that when the second salvageable variable-flow-channel pipe column is suspended and installed in the cavity of the drill rod, the second upper sealing element is positioned above the upper pipe outer water injection expansion packer, the second middle sealing element is positioned between the upper pipe outer water injection expansion packer and the sand control screen pipe, the second water outlet is positioned in the area where the sand control screen pipe is located, the second water outlet faces the sand control screen pipe, the second middle lower sealing element is positioned between the sand control screen pipe outer water injection expansion packer and the lower pipe outer water injection expansion packer, and the second lower sealing element is positioned below the lower pipe outer water injection expansion packer.
3. The simple small pressure difference testing device with the functions of drilling, completing and testing gas as claimed in claim 2, wherein the third salvageable variable flow passage string comprises a third fishing spearhead, a third pipe string and a third water passage, the third fishing spearhead is fixedly connected with the third pipe string, the third fishing spearhead is located at the upper end of the third pipe string, the third water passage extends in parallel along the axial direction of the third pipe string, and the simple small pressure difference testing device further comprises a third water inlet passage, a third suspension ring, a third upper sealing member, a third middle lower sealing member, a third water outlet and a third lower sealing member which are sequentially arranged along the axial direction of the third pipe string from top to bottom,
the third water inlet channel is used for guiding liquid in the drill rod into a third water passage in a third pipe column, the third suspension ring is used for suspending and installing a third salvageable variable flow passage pipe column in a cavity of the drill rod, and the third upper sealing element, the third middle lower sealing element, the third water outlet and the third lower sealing element are sequentially and respectively installed at the upper end, the middle lower end and the lower end of the third pipe column, so that when the third salvageable variable flow passage pipe column is suspended and installed in the cavity of the drill rod, the third upper sealing element is positioned above the upper pipe outer water injection expansion packer, the third middle sealing element is positioned between the upper pipe outer water injection expansion packer and the sand control screen pipe, the third middle lower sealing element is positioned between the sand control screen pipe and the lower pipe outer water injection expansion packer, the third water outlet is positioned in the area where the lower pipe outer water injection expansion packer is positioned, so that the liquid in the drill rod can enter the lower pipe outer water injection expansion packer, and the third lower sealing element is positioned below the lower pipe outer water injection expansion packer.
4. The simple small pressure difference testing device with the functions of drilling, completing and testing gas as claimed in claim 3, wherein the fourth salvageable variable flow passage string comprises a fourth fishing spear head, a fourth pipe string and a fourth water passage, the fourth fishing spear head is fixedly connected with the fourth pipe string, the fourth fishing spear head is located at the upper end of the fourth pipe string, the fourth water passage extends in parallel along the axial direction of the fourth pipe string, and the simple small pressure difference testing device further comprises a fourth water inlet passage, a fourth suspension ring, a fourth upper sealing element, a fourth water outlet and a fourth lower sealing element which are sequentially installed along the axial direction of the fourth pipe string from top to bottom,
the fourth water inlet channel is used for flowing liquid in the drill rod into a fourth water inlet channel in a fourth pipe column, the fourth suspension ring is used for installing the fourth salvageable variable-flow-channel pipe column in a cavity of the drill rod in a suspension mode, the fourth upper sealing element, the fourth water outlet and the fourth lower sealing element are sequentially and respectively installed at the upper end of the first pipe column, the middle end and the lower end, so that when the fourth salvageable variable-flow-channel pipe column is installed in the cavity of the drill rod in a suspension mode, the fourth upper sealing element is located above the upper pipe outer water injection expansion packer, the fourth water outlet is located in the area where the upper pipe outer water injection expansion packer is located, liquid in the drill rod can enter the upper pipe outer water injection expansion packer, and the fourth lower sealing element is located below the lower pipe outer water injection expansion packer.
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| CN110273666A (en) * | 2019-07-05 | 2019-09-24 | 中石化石油工程技术服务有限公司 | Deep water exploitation of gas hydrates system and recovery method |
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