CN104481432A - Sand washing pipe column and sand washing method of low-pressure leakage well - Google Patents
Sand washing pipe column and sand washing method of low-pressure leakage well Download PDFInfo
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- CN104481432A CN104481432A CN201410680006.8A CN201410680006A CN104481432A CN 104481432 A CN104481432 A CN 104481432A CN 201410680006 A CN201410680006 A CN 201410680006A CN 104481432 A CN104481432 A CN 104481432A
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- clean out
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- 239000004576 sand Substances 0.000 title claims abstract description 325
- 238000005406 washing Methods 0.000 title claims abstract description 152
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000011010 flushing procedure Methods 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 210000002445 nipple Anatomy 0.000 claims description 43
- 238000012856 packing Methods 0.000 claims description 42
- 238000004140 cleaning Methods 0.000 claims description 41
- 239000012530 fluid Substances 0.000 claims description 41
- 238000010521 absorption reaction Methods 0.000 claims description 36
- 230000007704 transition Effects 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 4
- 238000013519 translation Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning In General (AREA)
Abstract
The invention provides a sand washing pipe column of a low-pressure leakage well and a sand washing method, wherein the pipe column comprises a sleeve and an oil pipe arranged in the sleeve, an oil sleeve annulus is formed between the sleeve and the oil pipe, and the lower end of the oil pipe is sequentially connected with a sand washing conversion short section for liquid flow conversion, at least one sand washing concentric pipe, a sand washer and a sand detecting head from top to bottom; an upper self-sealing packer and a lower self-sealing packer which are respectively positioned at the upper end and the lower end of the sand flushing concentric tube are arranged in the sleeve, and the upper self-sealing packer is positioned above an oil layer; an annular cavity is formed between an outer sand washing pipe and an inner sand washing pipe of the sand washing concentric pipe, and the inner cavity of the inner sand washing pipe is butted with the inner cavity of the oil pipe; the sand washing liquid in the air of the oil lantern ring flows into the annular cavity from top to bottom through the sand washing conversion short section and then flows out from an opening below the annular cavity, and the sand washing liquid carrying sand flows out from bottom to top through the sand detecting head, the sand washer, the inner cavity of the inner sand washing pipe and the inner cavity of the oil pipe in sequence, so that sand washing circulation is effectively established, and the stratum leakage rate is controlled.
Description
Technical field
The present invention relates to technical field of petroleum extraction, the sand-flushing pipe column that particularly a kind of sand washing absorption well of low reservoir pressure coefficient is required in sand washing operation process and sand washing method.
Background technology
Sandstone reservoir, it is a universal phenomenon that oil-water well shakes out, and degree of shaking out is by the impact of the factors such as reservoir properties, granular cementation situation, water injection intensity.
Along with the development process in oil field, most domestic old filed has entered the middle and later periods of oil field development, main productive formation section water injection time is long, water injection intensity large, shakes out day by day serious, there is again shorting in various degree simultaneously, and cause reservoir pressure coefficient low, thus shaft bottom sand setting thoroughly cannot be cleaned out when causing sand washing operation, its direct result is the effective sand setting insufficient space in shaft bottom, frequently occurs that sand buries oil reservoir, pump detection period is caused to shorten, the frequent operation of oil well.Meanwhile, return conventional sand washing operation and bring great construction risk, easily cause that sand buries oil reservoir, sand card tubing string turns overhaul, sand washing and many production unfavorable factors such as not return.
For low pressure leakage oil-water well, way conventional at present adopts stifled sand washing temporarily, reduces formation leakage amount, increase the prop-carrying capacity of sand cleaning fluid simultaneously.But costly, to oil layer pollution comparatively greatly, directly constrain the application of stifled sand washing temporarily.Oil-water well sand wash operation is the routine operation of light maintenance operation, and existing sand-flushing pipe column, sand flushing tool, scouring equipment can meet the sand washing operation of conventional oil-water well substantially.At present, the main cause of low-pressure absorption well sand flushing difficulty is:
1, reservoir pressure coefficient is low, and sand cleaning fluid leakage is serious, sand cleaning fluid polluted reservoir;
2, low pressure leakage, cause sand washing not thorough, the effective sand setting insufficient space in shaft bottom, needs frequent sand washing;
3, to return liquid few for well head, then return flow velocity low, and sand particle secondary settlement easily occurs and forms sand bridge, causes well card accident;
4, sand washing circulation can not effectively be set up.
Summary of the invention
For solving above-mentioned technical problem, the present invention proposes a kind of sand-flushing pipe column and sand washing method of low-pressure absorption well, effectively sets up sand washing circulation, and controls formation leakage rate, carry out easy, safe, sand washing operation efficiently.
The sand-flushing pipe column of a kind of low-pressure absorption well of the present invention, comprise sleeve pipe and be placed in the oil pipe in described sleeve pipe, form oil jacket annular space between described sleeve pipe and described oil pipe, the lower end of described oil pipe connects the sand washing conversion pipe nipple being used for liquid stream translation, at least one sand washing concentric tube, sand washing machine and spy sand head from top to bottom successively; Arrange in described sleeve pipe and lay respectively at the upper self-packing packer at the two ends up and down of described sand washing concentric tube and lower self-packing packer, described upper self-packing packer is positioned at the top of oil reservoir;
Described sand washing concentric tube comprises outer sand clean out pipe and is placed in the interior sand clean out pipe in described outer sand clean out pipe, and form toroidal cavity between described outer sand clean out pipe and described interior sand clean out pipe, the inner chamber of described interior sand clean out pipe docks with the inner chamber of described oil pipe; Sand cleaning fluid in described oil jacket annular space flows into described toroidal cavity from top to bottom through described sand washing conversion pipe nipple, flow out from the lower opening of described toroidal cavity, the described sand cleaning fluid taking sand flows out from bottom to top through described spy sand head, described sand washing machine, the inner chamber of described interior sand clean out pipe, the inner chamber of described oil pipe successively again.
As the enforceable mode of one, the distance at described lower self-packing packer and described spy sand head interval is 0.3m ~ 0.6m.
As the enforceable mode of one, the internal diameter of described oil pipe is equal with the internal diameter of described interior sand clean out pipe, and the section area of the inner chamber of described interior sand clean out pipe is equal with the section area of described toroidal cavity.
As the enforceable mode of one, described sand washing machine is rotating jet sand washing machine.
As the enforceable mode of one, tubing centrilizer is installed in the lower end of described oil pipe, and concentric tube centralizer is installed in the lower end of described sand washing concentric tube.
As the enforceable mode of one, the upper surface of described upper self-packing packer is concordant with the upper surface of described sand washing concentric tube, and described lower self-packing packer is positioned at the below of described concentric tube centralizer.
As the enforceable mode of one, special-shaped box cupling suit is fixed on the upper end of described outer sand clean out pipe, and upper seal nipple arranges through hole, and described upper seal nipple is fixed on the upper end of described interior sand clean out pipe by described through hole suit;
On the outer wall of described upper seal nipple, interval arranges multiple raised ribs, and described raised ribs radially extends to the internal face of described special-shaped box cupling and is fixedly connected with it; Described interior sand clean out pipe and described outer sand clean out pipe are linked into an integrated entity by described special-shaped box cupling and described upper seal nipple.
As the enforceable mode of one, be fixedly installed at least two ribs in the circumference of its outer wall of lower end edge of described interior sand clean out pipe; Described ribs is cylinder, and its two ends abut to the inwall of described outer sand clean out pipe and the outer wall of described interior sand clean out pipe respectively.
As the enforceable mode of one, the quantity of described ribs is identical with the quantity of described raised ribs, and described ribs corresponds to the distributing position of described raised ribs along described upper seal nipple outer wall along the distributing position of described interior sand clean out pipe outer wall.
As the enforceable mode of one, the outer wall of described interior sand clean out pipe upper end arranges outer steps, the inwall of described upper seal nipple lower end is arranged the interior step matched with described outer steps;
The outer wall of described interior sand clean out pipe lower end is arranged the transition face towards sloped-end, the inwall of described upper seal nipple upper end arranges wedging surface, and the slope of described wedging surface is identical with the slope of described transition face.
The sand washing method of a kind of low-pressure absorption well of the present invention, the sand-flushing pipe column of the low-pressure absorption well described in employing carries out sand washing operation, and concrete steps are as follows:
S10, visits the data in sand face according to field operation, enters position under determining the use radical of sand washing concentric tube in the sand-flushing pipe column of described low-pressure absorption well and sand washing conversion pipe nipple, upper self-packing packer, lower self-packing packer;
S20, inserts sand setting bed by the lower end of sleeve pipe, under enter the sand-flushing pipe column of described low-pressure absorption well, adopt recoil sand mode to carry out sand washing operation, sand cleaning fluid injected oil jacket annular space between described sleeve pipe and oil pipe according to predetermined design discharge capacity;
S30, described sand cleaning fluid flows into the toroidal cavity of sand washing concentric tube from top to bottom through sand washing conversion pipe nipple, then flows out from the lower opening of described toroidal cavity; Sealing leakage section for preventing described sand cleaning fluid from entering stratum between upper self-packing packer and lower self-packing packer, described sand cleaning fluid contacts with stratum in the below of described lower self-packing packer; Sand washing machine lifts sand and stirring;
S40, the described sand cleaning fluid taking sand flows out well head from bottom to top through spy sand head, described sand washing machine, the inner chamber of interior sand clean out pipe, the inner chamber of oil pipe successively, completes sand washing circulation;
S50, the internal circulating load of described sand cleaning fluid is the hole volume of at least twice, or the sand ratio that well head returns out described sand cleaning fluid meets sand washing designing requirement, completes sand washing operation.
The present invention is compared to the beneficial effect of prior art: use the sand-flushing pipe column of low-pressure absorption well and sand washing method thereof to carry out sand washing operation, effectively sets up sand washing circulation; Contact stratum in the very small distance of sand cleaning fluid only between lower self-packing packer with sand setting bed, effectively control the wastage of sand cleaning fluid, reduce sand washing operation to the pollution of oil reservoir, improve sand washing efficiency.Whole tubing string adopts uniform section design, and sand cleaning fluid is along journey without damming, and head loss is little, greatly improves shaft bottom sand washing and the effect taking sand.
The connection operation of sand washing concentric tube is simple, and sealing is reliable, and applying conventional workover treatment equipment can enter sand washing concentric tube in simple and fast underground.The usage quantity of sand washing concentric tube is unrestricted, can form longer sealing leakage section, can be applicable to the leakage sand washing of long well section, also can be applicable to the leakage sand washing of short well section.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sand-flushing pipe column of low-pressure absorption well;
Fig. 2 is the structural representation of the sand washing concentric tube of the sand-flushing pipe column of low-pressure absorption well.
Reference numeral:
10-sand washing concentric tube; 12-toroidal cavity;
Sand clean out pipe in 110-; 114-transition face;
The outer sand clean out pipe of 120-; The special-shaped box cupling of 130-;
The upper seal nipple of 140-; 144-wedging surface;
150-ribs; 170-sealing ring;
20-sand washing conversion pipe nipple; 30-oil pipe; 32-oil jacket annular space;
40-sleeve pipe; The upper self-packing packer of 50-; Self-packing packer under 60-; 70-sand washing machine;
80-visits sand head; 92-tubing centrilizer; 94-concentric tube centralizer;
100-sand setting bed.
Detailed description of the invention
Below in conjunction with accompanying drawing, to above-mentioned being clearly and completely described with other technical characteristic and advantage of the present invention, obviously, described embodiment is only section Example of the present invention, instead of whole embodiment.
Refer to shown in Fig. 1, a kind of sand-flushing pipe column of low-pressure absorption well, the oil pipe 30 comprising sleeve pipe 40 and be placed in sleeve pipe 40, form oil jacket annular space 32 between sleeve pipe 40 and oil pipe 30, the lower end of oil pipe 30 connects the sand washing conversion pipe nipple 20 being used for liquid stream translation, at least one sand washing concentric tube 10, sand washing machine 70 and spy sand head 80 from top to bottom successively.Arrange in sleeve pipe 40 and lay respectively at the upper self-packing packer 50 at the two ends up and down of sand washing concentric tube 10 and lower self-packing packer 60, upper self-packing packer 50 is positioned at the top of oil reservoir.
The interior sand clean out pipe 110 that sand washing concentric tube 10 comprises outer sand clean out pipe 120 and is placed in outer sand clean out pipe 120, form toroidal cavity 12 between outer sand clean out pipe 120 and interior sand clean out pipe 110, the inner chamber of interior sand clean out pipe 110 docks with the inner chamber of oil pipe 30.Oil jacket annular space 32 is communicated with toroidal cavity 12 by sand washing conversion pipe nipple 20, forms top-down sand washing passage, and the sand cleaning fluid in oil jacket annular space 32 flows into toroidal cavity 12 from top to bottom through sand washing conversion pipe nipple 20, then flows out from the lower opening of toroidal cavity 12; Visit sand head 80, sand washing machine 70, the inner chamber of interior sand clean out pipe 110, the inner space of oil pipe 30, form reflux passage from bottom to top, the sand cleaning fluid taking sand flows out from bottom to top through spy sand head 80, sand washing machine 70, the inner chamber of interior sand clean out pipe 110, the inner chamber of oil pipe 30 successively, effectively sets up sand washing circulation.
To sum up, the sealing leakage section avoiding sand cleaning fluid to enter stratum is formed between upper self-packing packer 50 and lower self-packing packer 60, sand cleaning fluid does not directly contact with the stratum of long distance, sand cleaning fluid only contacts stratum at lower self-packing packer 60 with in the very small distance between sand setting bed 100, effectively control the wastage of sand cleaning fluid, improve sand washing efficiency.Compared with the sand-washing pen point used with routine, when implementing sand washing operation, lower self-styled envelope lower packet 8 is less to the distance in the sand setting face of sand setting bed 100, and sand cleaning fluid wastage reduces greatly.
The sand-flushing pipe column of low-pressure absorption well not only can effectively control formation leakage amount, reduces sand washing operation to the pollution of oil reservoir, effectively can set up sand washing circulation simultaneously, ensure sand washing job safety, efficiently, smoothly carries out.In employing, self-packing packer 50 and lower self-packing packer 60, can realize effective sealing under low voltage difference condition, and seal and pressure bearing is high, sealing reliable; Overcome the shortcoming that inflatable packer is poorly sealed, seal pressure differential is large, seal and pressure bearing is low.
Sand washing conversion pipe nipple 20 has liquid stream translation concurrently and is connected the effect changed with button-type: sand washing change pipe nipple 20 with on after sealed packer 5 coordinates, ensure that sand cleaning fluid is descending and flow into toroidal cavity 12 from oil jacket annular space 32, inner chamber, the oil pipe 30 of interior sand clean out pipe 110 of above passing through flow out.The upper end of sand washing conversion pipe nipple 20 adopts oil pipe button-type to be connected with oil pipe 30, and the lower end of sand washing conversion pipe nipple 20 adopts concentric tube button-type to be connected with concentric tube.The prior art that pipe nipple 20 is petroleum industry is changed in sand washing, does not repeat them here.
As the enforceable mode of one, the distance at lower self-packing packer 60 and spy sand head 80 interval is 0.3m ~ 0.6m, in this distance, can ensure obtain best sand washing and take sand effect.
As the enforceable mode of one, the internal diameter of oil pipe 30 is equal with the internal diameter of interior sand clean out pipe 110, and the section area of the inner chamber of interior sand clean out pipe 110 is equal with the section area of toroidal cavity 12.The sand-flushing pipe column of whole low-pressure absorption well adopts uniform section design, and sand cleaning fluid is along journey without damming, and head loss is little, when ground pump pressure is certain, greatly can improves shaft bottom sand washing and take sand effect.
As the enforceable mode of one, sand washing machine 70 is rotating jet sand washing machine.Sand, stirring are lifted in the shaft bottom that rotating jet sand washing machine can improve the sand-flushing pipe column of low-pressure absorption well greatly, ensure sand washing and take sand effect.
As the enforceable mode of one, tubing centrilizer 92 is installed in the lower end of oil pipe 30, and concentric tube centralizer 94 is installed in the lower end of sand washing concentric tube 10.
As the enforceable mode of one, the upper surface of upper self-packing packer 50 is concordant with the upper surface of sand washing concentric tube 10, and lower self-packing packer 60 is positioned at the below of concentric tube centralizer 94.
As the enforceable mode of one, refer to shown in Fig. 2, special-shaped box cupling 130 suit is fixed on the upper end of outer sand clean out pipe 120, and upper seal nipple 140 arranges through hole, and upper seal nipple 140 is fixed on the upper end of interior sand clean out pipe 110 by through hole suit; On the outer wall of upper seal nipple 140, interval arranges multiple raised ribs, and raised ribs radially extends to the internal face of special-shaped box cupling 130 and is fixedly connected with it; Interior sand clean out pipe 110 and outer sand clean out pipe 120 are linked into an integrated entity by special-shaped box cupling 130 and upper seal nipple 140.
Interior sand clean out pipe 110, outer sand clean out pipe 120 are processed to form the sand washing concentric tube 10 of integral type, the mode hanging and connect is adopted compared to interior sand clean out pipe 110, connect operation simple, interior sand clean out pipe 110 and outer sand clean out pipe 120 can positiver sealings by special-shaped box cupling 130 and upper seal nipple 140.Apply conventional workover treatment equipment and can enter sand washing concentric tube 10 in simple and fast underground.
As the enforceable mode of one, be fixedly installed at least two ribs 150 in the circumference of its outer wall of lower end edge of interior sand clean out pipe 110; Ribs 150 is cylinder, and its two ends abut to the inwall of outer sand clean out pipe 120 and the outer wall of interior sand clean out pipe 110 respectively.
As the enforceable mode of one, the quantity of ribs 150 is identical with the quantity of raised ribs, ribs 150 corresponds to the distributing position of raised ribs along upper seal nipple 140 outer wall along the distributing position of interior sand clean out pipe 110 outer wall, the flowing avoiding sand washing circulation time sand cleaning fluid is subject to excessive impact resistance, thus improves sand washing efficiency.
As the enforceable mode of one, the outer wall of interior sand clean out pipe 110 upper end arranges outer steps, the inwall of upper seal nipple 140 lower end is arranged the interior step matched with outer steps; The outer wall of interior sand clean out pipe 110 lower end is arranged the transition face 114 towards sloped-end, the inwall of upper seal nipple 140 upper end arranges wedging surface 144, and the slope of wedging surface 144 is identical with the slope of transition face 114.More preferably, transition face 114 or wedging surface 144 are set with at least one sealing ring 170.In the present embodiment, transition face 114 arranges two sealing rings 170.By upper seal nipple 140, transition face 114, wedging surface 144 and sealing ring 170, sand washing concentric tube 10 positiver sealing in sand washing operation effectively can be ensured.
When the quantity of sand washing concentric tube 10 is at least two, sand washing concentric tube 10 connects from top to bottom successively, and the wedging surface 144 being positioned at the sand washing concentric tube 10 of below seals with the transition face 114 of the sand washing concentric tube 10 being positioned at top fits.More preferably, for oil pipe button-type connects between adjacent sand washing concentric tube 10.Usually, in sleeve pipe 40 operating process of running string complicated, have a big risk, and need special well-control equipment and erecting tools.The connection procedure of sand washing concentric tube 10 of the present invention is identical with the connection procedure of plain tubing, without the need to special equipment and instrument, simple to operate, safe and reliable.
The data recorded according to spy sand head and oil reservoir situation, determine the sand washing degree of depth, then design the sand-flushing pipe column of low-pressure absorption well according to sand washing depth requirements.Connected mode due to sand washing concentric tube 10 is equal to the attended operation of plain tubing, so the usage quantity of sand washing concentric tube 10 is unrestricted, can form longer sealing leakage section.The present invention can be applicable to the leakage sand washing of long well section, also can be applicable to the leakage sand washing of short well section.
The present invention also proposes a kind of sand washing method of low-pressure absorption well, and adopt the sand-flushing pipe column of described low-pressure absorption well to carry out sand washing operation, concrete steps are as follows:
S10, the data in sand face are visited according to field operation, determine that the use radical of sand washing concentric tube 10 in the sand-flushing pipe column of low-pressure absorption well and sand washing conversion pipe nipple 20, upper self-packing packer 50, lower self-packing packer enter position 60 times, the structure of the sand-flushing pipe column of the low-pressure absorption well of design forming actual needs;
S20, sand setting bed 100 is inserted in the lower end of sleeve pipe 40, under enter the sand-flushing pipe column of low-pressure absorption well, adopt recoil sand mode to carry out sand washing operation, by sand cleaning fluid according to predetermined design discharge capacity from the oil jacket annular space 32 between the upper opening sprue bushing 40 and oil pipe 30 of oil jacket annular space 32; More preferably, predetermined design discharge capacity is generally the hole volume of 2 ~ 5 times, and pit shaft refers to the cylindrical space surrounded by well head to sleeve pipe 40 inwall and the artificial bottom of a well in shaft bottom;
S30, sand cleaning fluid flows into the toroidal cavity 12 of sand washing concentric tube 10 from top to bottom through sand washing conversion pipe nipple 20, then flows out from the lower opening of toroidal cavity 12; Upper self-packing packer 50 is positioned at the top of oil reservoir, the sealing leakage section for preventing sand cleaning fluid from entering stratum between upper self-packing packer 50 and lower self-packing packer 60, and sand cleaning fluid only contacts with stratum in the below of lower self-packing packer 60; Sand washing machine 70 lifts sand and stirring;
S40, the sand cleaning fluid taking sand flows out well head from bottom to top through spy sand head 80, sand washing machine 70, the inner chamber of interior sand clean out pipe 110, the inner chamber of oil pipe 30 successively, completes sand washing circulation;
S50, the internal circulating load of sand cleaning fluid is the hole volume of at least twice, or the sand ratio that well head returns out sand cleaning fluid meets sand washing designing requirement, completes sand washing operation.
More preferably, in S10, visit the data in sand face according to field operation, determine that tubing centrilizer 92 and concentric tube centralizer enter position 94 times.
Above-described specific embodiment, has carried out further detailed description to object of the present invention, technical scheme and beneficial effect, should be appreciated that and the foregoing is only specific embodiments of the invention, the protection domain be not intended to limit the present invention.Particularly point out, to those skilled in the art, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the sand-flushing pipe column of a low-pressure absorption well, comprise sleeve pipe and be placed in the oil pipe in described sleeve pipe, oil jacket annular space is formed between described sleeve pipe and described oil pipe, it is characterized in that, the lower end of described oil pipe connects the sand washing conversion pipe nipple being used for liquid stream translation, at least one sand washing concentric tube, sand washing machine and spy sand head from top to bottom successively; Arrange in described sleeve pipe and lay respectively at the upper self-packing packer at the two ends up and down of described sand washing concentric tube and lower self-packing packer, described upper self-packing packer is positioned at the top of oil reservoir;
Described sand washing concentric tube comprises outer sand clean out pipe and is placed in the interior sand clean out pipe in described outer sand clean out pipe, and form toroidal cavity between described outer sand clean out pipe and described interior sand clean out pipe, the inner chamber of described interior sand clean out pipe docks with the inner chamber of described oil pipe; Sand cleaning fluid in described oil jacket annular space flows into described toroidal cavity from top to bottom through described sand washing conversion pipe nipple, flow out from the lower opening of described toroidal cavity, the described sand cleaning fluid taking sand flows out from bottom to top through described spy sand head, described sand washing machine, the inner chamber of described interior sand clean out pipe, the inner chamber of described oil pipe successively again.
2. the sand-flushing pipe column of low-pressure absorption well according to claim 1, is characterized in that, the distance at described lower self-packing packer and described spy sand head interval is 0.3m ~ 0.6m.
3. the sand-flushing pipe column of low-pressure absorption well according to claim 1, is characterized in that, the internal diameter of described oil pipe is equal with the internal diameter of described interior sand clean out pipe, and the section area of the inner chamber of described interior sand clean out pipe is equal with the section area of described toroidal cavity.
4. the sand-flushing pipe column of low-pressure absorption well according to claim 1, is characterized in that, described sand washing machine is rotating jet sand washing machine.
5. the sand-flushing pipe column of the low-pressure absorption well according to any one of Claims 1-4, is characterized in that, tubing centrilizer is installed in the lower end of described oil pipe, and concentric tube centralizer is installed in the lower end of described sand washing concentric tube.
6. the sand-flushing pipe column of low-pressure absorption well according to claim 5, is characterized in that, the upper surface of described upper self-packing packer is concordant with the upper surface of described sand washing concentric tube, and described lower self-packing packer is positioned at the below of described concentric tube centralizer.
7. the sand-flushing pipe column of low-pressure absorption well according to claim 1, it is characterized in that, special-shaped box cupling suit is fixed on the upper end of described outer sand clean out pipe, and upper seal nipple arranges through hole, and described upper seal nipple is fixed on the upper end of described interior sand clean out pipe by described through hole suit;
On the outer wall of described upper seal nipple, interval arranges multiple raised ribs, and described raised ribs radially extends to the internal face of described special-shaped box cupling and is fixedly connected with it; Described interior sand clean out pipe and described outer sand clean out pipe are linked into an integrated entity by described special-shaped box cupling and described upper seal nipple.
8. the sand-flushing pipe column of low-pressure absorption well according to claim 7, is characterized in that, is fixedly installed at least two ribs in the circumference of its outer wall of lower end edge of described interior sand clean out pipe; Described ribs is cylinder, and its two ends abut to the inwall of described outer sand clean out pipe and the outer wall of described interior sand clean out pipe respectively.
9. the sand-flushing pipe column of low-pressure absorption well according to claim 8, it is characterized in that, the quantity of described ribs is identical with the quantity of described raised ribs, and described ribs corresponds to the distributing position of described raised ribs along described upper seal nipple outer wall along the distributing position of described interior sand clean out pipe outer wall.
10. the sand-flushing pipe column of low-pressure absorption well according to claim 7, is characterized in that, the outer wall of described interior sand clean out pipe upper end arranges outer steps, the inwall of described upper seal nipple lower end is arranged the interior step matched with described outer steps;
The outer wall of described interior sand clean out pipe lower end is arranged the transition face towards sloped-end, the inwall of described upper seal nipple upper end arranges wedging surface, and the slope of described wedging surface is identical with the slope of described transition face.
The sand washing method of 11. 1 kinds of low-pressure absorption wells, is characterized in that, adopt the sand-flushing pipe column of the low-pressure absorption well as described in any one of claim 1 to 10 to carry out sand washing operation, concrete steps are as follows:
S10, visits the data in sand face according to field operation, enters position under determining the use radical of sand washing concentric tube in the sand-flushing pipe column of described low-pressure absorption well and sand washing conversion pipe nipple, upper self-packing packer, lower self-packing packer;
S20, inserts sand setting bed by the lower end of sleeve pipe, under enter the sand-flushing pipe column of described low-pressure absorption well, adopt recoil sand mode to carry out sand washing operation, sand cleaning fluid injected oil jacket annular space between described sleeve pipe and oil pipe according to predetermined design discharge capacity;
S30, described sand cleaning fluid flows into the toroidal cavity of sand washing concentric tube from top to bottom through sand washing conversion pipe nipple, then flows out from the lower opening of described toroidal cavity; Sealing leakage section for preventing described sand cleaning fluid from entering stratum between upper self-packing packer and lower self-packing packer, described sand cleaning fluid contacts with stratum in the below of described lower self-packing packer; Sand washing machine lifts sand and stirring;
S40, the described sand cleaning fluid taking sand flows out well head from bottom to top through spy sand head, described sand washing machine, the inner chamber of interior sand clean out pipe, the inner chamber of oil pipe successively, completes sand washing circulation;
S50, the internal circulating load of described sand cleaning fluid is the hole volume of at least twice, or the sand ratio that well head returns out described sand cleaning fluid meets sand washing designing requirement, completes sand washing operation.
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| CN201410680006.8A CN104481432A (en) | 2014-11-24 | 2014-11-24 | Sand washing pipe column and sand washing method of low-pressure leakage well |
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| CN201410680006.8A CN104481432A (en) | 2014-11-24 | 2014-11-24 | Sand washing pipe column and sand washing method of low-pressure leakage well |
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| CN104481432A true CN104481432A (en) | 2015-04-01 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285551A (en) * | 2016-09-08 | 2017-01-04 | 中国石油天然气股份有限公司 | Packer for sand washing concentric pipe |
| CN106522863A (en) * | 2016-09-28 | 2017-03-22 | 中国石油天然气股份有限公司 | Reverse circulation sand washing device and sand washing process pipe column |
| CN106593329A (en) * | 2016-12-20 | 2017-04-26 | 库尔勒施得石油技术服务有限公司 | Gas life reverse-circulation negative pressure sand-cleaning method and apparatus |
| CN106677727A (en) * | 2016-12-20 | 2017-05-17 | 西安迈克斯石油技术有限公司 | Continuous negative pressure sand washing device and system thereof |
| CN107762443A (en) * | 2016-08-18 | 2018-03-06 | 中国石油化工股份有限公司 | Well repairing device and method for well fixing |
| CN109869121A (en) * | 2019-03-18 | 2019-06-11 | 中国石油化工股份有限公司 | The mechanical sand control technique of small casing pipe well |
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| CN115059423A (en) * | 2022-06-09 | 2022-09-16 | 西南石油大学 | Sand washing pressure compensation device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4027732A (en) * | 1975-08-06 | 1977-06-07 | Kajan Specialty Company, Inc. | Tool for washing perforations in cased well bore |
| CN2277453Y (en) * | 1996-07-05 | 1998-04-01 | 胜利石油管理局胜利采油厂 | Telescopic continuous flushing device |
| US5810410A (en) * | 1996-01-17 | 1998-09-22 | The Cavins Corporation | Combined washover and retrieval device |
| CN2811547Y (en) * | 2005-05-12 | 2006-08-30 | 贺明 | Double-barrelled two-way leather cup leak protection sand washing tubular column of oil well |
| CN2893131Y (en) * | 2005-12-23 | 2007-04-25 | 中国石油化工股份有限公司河南油田分公司第二采油厂 | Sand flushing packer |
| CN200940456Y (en) * | 2006-08-28 | 2007-08-29 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Spiral flow sand washing device for horizontal well |
| CN203022643U (en) * | 2012-11-03 | 2013-06-26 | 中国石油化工股份有限公司 | Loss oil layer double-tube continuous sand removal tubular column |
| CN104074485A (en) * | 2014-06-27 | 2014-10-01 | 西安中孚凯宏石油科技有限责任公司 | Horizontal well leakage-proof rotational flow sand-washing device and sand-washing technology thereof |
| CN204283269U (en) * | 2014-11-24 | 2015-04-22 | 中国石油天然气股份有限公司 | Sand washing pipe column of low-pressure leakage well |
-
2014
- 2014-11-24 CN CN201410680006.8A patent/CN104481432A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4027732A (en) * | 1975-08-06 | 1977-06-07 | Kajan Specialty Company, Inc. | Tool for washing perforations in cased well bore |
| US5810410A (en) * | 1996-01-17 | 1998-09-22 | The Cavins Corporation | Combined washover and retrieval device |
| CN2277453Y (en) * | 1996-07-05 | 1998-04-01 | 胜利石油管理局胜利采油厂 | Telescopic continuous flushing device |
| CN2811547Y (en) * | 2005-05-12 | 2006-08-30 | 贺明 | Double-barrelled two-way leather cup leak protection sand washing tubular column of oil well |
| CN2893131Y (en) * | 2005-12-23 | 2007-04-25 | 中国石油化工股份有限公司河南油田分公司第二采油厂 | Sand flushing packer |
| CN200940456Y (en) * | 2006-08-28 | 2007-08-29 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Spiral flow sand washing device for horizontal well |
| CN203022643U (en) * | 2012-11-03 | 2013-06-26 | 中国石油化工股份有限公司 | Loss oil layer double-tube continuous sand removal tubular column |
| CN104074485A (en) * | 2014-06-27 | 2014-10-01 | 西安中孚凯宏石油科技有限责任公司 | Horizontal well leakage-proof rotational flow sand-washing device and sand-washing technology thereof |
| CN204283269U (en) * | 2014-11-24 | 2015-04-22 | 中国石油天然气股份有限公司 | Sand washing pipe column of low-pressure leakage well |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107762443A (en) * | 2016-08-18 | 2018-03-06 | 中国石油化工股份有限公司 | Well repairing device and method for well fixing |
| CN106285551A (en) * | 2016-09-08 | 2017-01-04 | 中国石油天然气股份有限公司 | Packer for sand washing concentric pipe |
| CN106285551B (en) * | 2016-09-08 | 2018-08-14 | 中国石油天然气股份有限公司 | Packer for sand washing concentric pipe |
| CN106522863B (en) * | 2016-09-28 | 2019-06-11 | 中国石油天然气股份有限公司 | Reverse circulation sand washing device and sand washing process pipe column |
| CN106522863A (en) * | 2016-09-28 | 2017-03-22 | 中国石油天然气股份有限公司 | Reverse circulation sand washing device and sand washing process pipe column |
| CN106677727A (en) * | 2016-12-20 | 2017-05-17 | 西安迈克斯石油技术有限公司 | Continuous negative pressure sand washing device and system thereof |
| CN106593329B (en) * | 2016-12-20 | 2019-08-30 | 库尔勒施得石油技术服务有限公司 | Gas lift reverse circulation negative pressure sand removal method and fettling installation |
| CN106593329A (en) * | 2016-12-20 | 2017-04-26 | 库尔勒施得石油技术服务有限公司 | Gas life reverse-circulation negative pressure sand-cleaning method and apparatus |
| CN109869121A (en) * | 2019-03-18 | 2019-06-11 | 中国石油化工股份有限公司 | The mechanical sand control technique of small casing pipe well |
| CN109869121B (en) * | 2019-03-18 | 2021-02-19 | 中国石油化工股份有限公司 | Mechanical sand prevention process for small cased well |
| CN111852351A (en) * | 2020-06-23 | 2020-10-30 | 肖云东 | Oil field special buckle oil pipe short joint |
| CN111852351B (en) * | 2020-06-23 | 2022-02-25 | 大庆市奈固石油机械设备制造有限公司 | Oil field special buckle oil pipe short joint |
| CN115059423A (en) * | 2022-06-09 | 2022-09-16 | 西南石油大学 | Sand washing pressure compensation device |
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Application publication date: 20150401 |