CN101078336A - Low-pressure well negative pressure continuous sand washing technique - Google Patents
Low-pressure well negative pressure continuous sand washing technique Download PDFInfo
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- CN101078336A CN101078336A CN 200610013830 CN200610013830A CN101078336A CN 101078336 A CN101078336 A CN 101078336A CN 200610013830 CN200610013830 CN 200610013830 CN 200610013830 A CN200610013830 A CN 200610013830A CN 101078336 A CN101078336 A CN 101078336A
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Abstract
The invention relates to a negative-pressure continuous sand-washing process in low-pressure well, mainly suitable for sand-washing process of well pore in oil and gas field development. The process mainly comprises that the negative-pressure continuous sand-washing process tube in low-pressure well moves downward to the presetting position; high-pressure dynamical liquid is injected from oil jacket ring; part of dynamical liquid moves upward into the negative-pressure injecting pump as the dynamical liquid of injecting pump; after it passes through the nozzle of injecting pump, negative pressure is generated at the throat tube position; another part moves downward to the well bottom along the oil pipe as the sand-washing liquid, which is used to wash well bottom; by negative-pressure action of injecting pump, the sand-washing liquid carries sand to return the ground from the oil pipe through cup packer and clamping-wall cavity of injecting pump. When oil connecting pipe is needed to wash sand downward continuously, quick joint is connected at the side hole of sand-washing nipple. The quick joint is connected with the hose of side hole. Then the side hole of sand-washing nipple is opened. The main flow channel of sand-washing nipple is closed. Connected pipe series, of which the lower end is the oil pipe and the upper end is the sand-washing nipple, is connected with pipe column to realize deepening the pipe column. After pipe series is screwed down, the side hole of sand-washing nipple is closed so that the pipe column moves downward continuously. In this way repeatedly, the well bottom is washed.
Description
Technical field
The present invention relates to a kind of low-pressure well negative pressure continuous sand washing technique, is a technology that is used for operation of oil well continuous sand flushing or low pressure oil well sand washing operation, is the processing method of using during sand production in oil gas well development process.
Background technology
Along with China's onshore oil field exploitation has entered the middle and later periods exploitation, strata pressure descends gradually, because of sand production, causes interior sand card of pit shaft or sand to bury the oil reservoir phenomenon, causes oil well output to reduce, and must carry out sand washing and handle; But conventional sand washing method has the part sand grains and is squeezed into the stratum, and the sand grains that enters the stratum when producing flows into pit shaft again and piles up, and sand washing can not be carried out continuously, has reduced oil well yield widely.
Technical scheme
The objective of the invention is to solve low pressure oil well sand cleaning fluid when carrying out the sand washing operation takes sand and enters the problem that stratum and conventional sand washing can not be carried out continuously.
The present invention adopts following technical scheme, and promptly a kind of low-pressure well negative pressure continuous sand washing technique adopts following processing step:
A, with the precalculated position of low-pressure well negative pressure continuous sand washing technique tubing string down to pit shaft, the negative pressure water jet pump, shunting cup packer, chimney filter, circulator, the sand washing nib that are about in sand washing pipe nipple, snap joint, self-sealing blowout preventer and the bottom pit shaft on well head top are connected in turn.
B, inject high voltage power liquid from the oil jacket annular space, these power fluids move upward through shunting cup packer side opening parts and enter the power fluid that the negative pressure water jet pump becomes water jet pump, through behind the nozzle of water jet pump, produce negative pressure at the trunnion place; Another part moves downward the shaft bottom along oil pipe, and at the bottom of the sand cleaning fluid flushing manhole, by the water jet pump suction function, sand cleaning fluid carries sand grains by the double wall chamber of cup packer and water jet pump and returns ground from oil pipe.
C, in the time of need continuing to connect the downward sand washing of oil pipe, the place connects snap joint at sand washing pipe nipple side opening, snap joint links to each other with the side opening hose, open sand washing pipe nipple side opening afterwards, close sand washing pipe nipple sprue, laying down the upper end hose, is that oil pipe upper end is that the pipe string of a sand washing pipe nipple is connected realization intensification tubing string with tubing string with the lower end that connects.
After D, pipe string are tightened, connect the end hose, open sand washing pipe nipple sprue, close sand washing pipe nipple side opening, downwards continuous sand flushing.
E, repeat C, D step, sand washing is till the shaft bottom.
The suction function that the present invention can make full use of the formation of negative pressure jet pump nozzle place carries sand cleaning fluid to well head, has reached the purpose of protection oil-gas Layer; Can realize continuous sand flushing by utilizing sand washing pipe nipple and self-sealing blowout preventer, avoid the adverse effect of termination of pumping midway the stratum; Add a sand washing pipe nipple by an oil pipe and deepen oil pipe and carry out sand washing, till being flushed to the shaft bottom, realized that sand buries the full well section sand washing of oil reservoir, avoid causing pit shaft sand to sink to the shaft bottom again because of too much termination of pumping.
Description of drawings
Fig. 1: low-pressure well negative pressure continuous sand washing technique schematic diagram
Among Fig. 1, sand washing pipe nipple 1, snap joint 2, self-sealing blowout preventer 3, negative pressure water jet pump 4, shunting cup packer 5, chimney filter 6, circulator 7, sand washing nib 8, shaft bottom 9, oil reservoir 10
The specific embodiment
Below in conjunction with accompanying drawing operating principle of the present invention is described in detail the low-pressure well negative pressure continuous sand washing technique tubing string is lowered to the precalculated position, install well head self-sealing blowout preventer 3, tubing string connects hose topmost, inject high voltage power liquid from the oil jacket annular space, these power fluids are through the side opening of shunting cup packer 5, a part moves upward and enters the power fluid that negative pressure water jet pump 4 becomes water jet pump 4, through behind the nozzle of water jet pump 4, produces negative pressure at the trunnion place; Another part moves downward the shaft bottom along oil pipe, at the bottom of the sand cleaning fluid flushing manhole, produce suction function by negative pressure water jet pump 4, sand cleaning fluid carries sand grains by the double wall chamber of shunting cup packer 5 and water jet pump 4 and returns ground from oil pipe, enters ground tanks by hose.Sand washing proceed to need connect oil pipe continue downwards towards the time, 1 side opening place connects snap joint 2 at the sand washing pipe nipple, snap joint 2 links to each other with the side opening hose, open sand washing pipe nipple 1 side opening, close sand washing pipe nipple 1 sprue, laying down the upper end hose, is that oil pipe upper end is that the pipe string of a sand washing pipe nipple 1 is connected realization intensification tubing string with tubing string with the lower end that connects.After the pipe string is tightened, connect the end hose, open sand washing pipe nipple 1 sprue, close sand washing pipe nipple 1 side opening, continue lower tubular column, so repeatedly, till being flushed to the shaft bottom.
Claims (1)
1, a kind of low-pressure well negative pressure continuous sand washing technique adopts following processing step:
A, with the precalculated position of low-pressure well negative pressure continuous sand washing technique tubing string down to pit shaft, the negative pressure water jet pump, shunting cup packer, chimney filter, circulator, the sand washing nib that are about in sand washing pipe nipple, snap joint, self-sealing blowout preventer and the bottom pit shaft on well head top are connected in turn.
B, inject high voltage power liquid from the oil jacket annular space, these power fluids move upward through shunting cup packer side opening parts and enter the power fluid that the negative pressure water jet pump becomes water jet pump, through behind the nozzle of water jet pump, produce negative pressure at the trunnion place; Another part moves downward the shaft bottom along oil pipe, and at the bottom of the sand cleaning fluid flushing manhole, by the water jet pump suction function, sand cleaning fluid carries sand grains by the double wall chamber of cup packer and water jet pump and returns ground from oil pipe.
C, in the time of need continuing to connect the downward sand washing of oil pipe, the place connects snap joint at sand washing pipe nipple side opening, snap joint links to each other with the side opening hose, open sand washing pipe nipple side opening afterwards, close sand washing pipe nipple sprue, laying down the upper end hose, is that oil pipe upper end is that the pipe string of a sand washing pipe nipple is connected realization intensification tubing string with tubing string with the lower end that connects.
After D, pipe string are tightened, connect the end hose, open sand washing pipe nipple sprue, close sand washing pipe nipple side opening, downwards continuous sand flushing.
E, repeat C, D step, sand washing is till the shaft bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610013830 CN101078336A (en) | 2006-05-24 | 2006-05-24 | Low-pressure well negative pressure continuous sand washing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610013830 CN101078336A (en) | 2006-05-24 | 2006-05-24 | Low-pressure well negative pressure continuous sand washing technique |
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| CN101078336A true CN101078336A (en) | 2007-11-28 |
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| CN 200610013830 Pending CN101078336A (en) | 2006-05-24 | 2006-05-24 | Low-pressure well negative pressure continuous sand washing technique |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280671B (en) * | 2008-05-09 | 2013-08-28 | 中国石油新疆油田分公司采油工艺研究院 | Concentric tube jet flow negative pressure sand washing apparatus and using method thereoof |
| CN103277059A (en) * | 2013-05-30 | 2013-09-04 | 中国石油天然气股份有限公司 | Negative pressure combined sand washing and forced sand discharging device |
| CN104153744A (en) * | 2014-07-31 | 2014-11-19 | 山东省地矿工程勘察院 | Pore type geothermal well jet well-flushing device and method for jetting well-flushing by using same |
| CN104407099A (en) * | 2014-10-16 | 2015-03-11 | 中国海洋石油总公司 | Sand cleaning fluid performance testing method |
| 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 |
| CN106869796A (en) * | 2017-04-21 | 2017-06-20 | 西南石油大学 | A kind of downhole hardware of machinery and jet flow negative pressure dual drive |
| CN107420054A (en) * | 2017-07-19 | 2017-12-01 | 中国石油天然气股份有限公司 | Oil well sand washing pipe column, using method thereof and oil well sand washing system |
| CN107816337A (en) * | 2016-09-12 | 2018-03-20 | 中国石油天然气股份有限公司 | Sand-carrying oil production method based on hydraulic jet pump |
| CN109252821A (en) * | 2018-09-28 | 2019-01-22 | 巴州盛业石油技术服务有限公司 | Contactless DH negative pressure clear liquid, solid phase tool and underground cleaning technology |
| CN113047790A (en) * | 2021-04-02 | 2021-06-29 | 中国石油天然气集团有限公司 | Pigging sand removal tool and method |
-
2006
- 2006-05-24 CN CN 200610013830 patent/CN101078336A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280671B (en) * | 2008-05-09 | 2013-08-28 | 中国石油新疆油田分公司采油工艺研究院 | Concentric tube jet flow negative pressure sand washing apparatus and using method thereoof |
| CN103277059A (en) * | 2013-05-30 | 2013-09-04 | 中国石油天然气股份有限公司 | Negative pressure combined sand washing and forced sand discharging device |
| CN103277059B (en) * | 2013-05-30 | 2015-11-18 | 中国石油天然气股份有限公司 | Negative pressure combined sand washing and forced sand discharging device |
| CN104153744A (en) * | 2014-07-31 | 2014-11-19 | 山东省地矿工程勘察院 | Pore type geothermal well jet well-flushing device and method for jetting well-flushing by using same |
| CN104407099A (en) * | 2014-10-16 | 2015-03-11 | 中国海洋石油总公司 | Sand cleaning fluid performance testing method |
| CN107816337A (en) * | 2016-09-12 | 2018-03-20 | 中国石油天然气股份有限公司 | Sand-carrying oil production method based on hydraulic jet pump |
| 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 |
| 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 |
| 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 |
| CN106869796A (en) * | 2017-04-21 | 2017-06-20 | 西南石油大学 | A kind of downhole hardware of machinery and jet flow negative pressure dual drive |
| CN107420054A (en) * | 2017-07-19 | 2017-12-01 | 中国石油天然气股份有限公司 | Oil well sand washing pipe column, using method thereof and oil well sand washing system |
| CN107420054B (en) * | 2017-07-19 | 2023-06-30 | 中国石油天然气股份有限公司 | Oil well sand washing pipe column, use method thereof and oil well sand washing system |
| CN109252821A (en) * | 2018-09-28 | 2019-01-22 | 巴州盛业石油技术服务有限公司 | Contactless DH negative pressure clear liquid, solid phase tool and underground cleaning technology |
| CN109252821B (en) * | 2018-09-28 | 2023-12-15 | 巴州盛业石油技术服务有限公司 | Non-contact type downhole negative pressure clear liquid, solid-phase tool and downhole cleaning process |
| CN113047790A (en) * | 2021-04-02 | 2021-06-29 | 中国石油天然气集团有限公司 | Pigging sand removal tool and method |
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Open date: 20071128 |