CN203531867U - Primary sand prevention letting-in tool and secondary resanding extruding and filling tool of primary sand prevention letting-in tool - Google Patents
Primary sand prevention letting-in tool and secondary resanding extruding and filling tool of primary sand prevention letting-in tool Download PDFInfo
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- CN203531867U CN203531867U CN201320662443.8U CN201320662443U CN203531867U CN 203531867 U CN203531867 U CN 203531867U CN 201320662443 U CN201320662443 U CN 201320662443U CN 203531867 U CN203531867 U CN 203531867U
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Abstract
The utility model discloses a primary sand prevention letting-in tool and a secondary resanding extruding and filling tool of the primary sand prevention letting-in tool. The primary sand prevention letting-in tool and the secondary resanding extruding and filling tool are used for the oil industry. The primary sand prevention letting-in tool comprises a center pipe, a rubber sleeve, a slip, a sealing sleeve and a filling sand outlet, a spring is clamped in the sealing sleeve, the filling sand outlet is plugged through the sealing sleeve, a positioning salvaging head is installed at the upper end of the center pipe, and releasing shear pins and positioning dowels are installed on the positioning salvaging head. A secondary resanding opening is formed in a resanding open sleeve of the secondary resanding extruding and filling tool and corresponds to the filling sand outlet, axial vertical grooves are formed in a positioning guiding sleeve to be matched with the positioning dowels on the positioning salvaging head, circulating openings are formed in a circulating sand flushing pipe, and a reversing ball is installed in a flushing pipe connector. The primary sand prevention letting-in tool and the secondary resanding extruding and filling tool are used for sand prevention and resanding of an oil-water wall, the working procedures are few, and the construction period is short.
Description
Technical field
The utility model relates to the down-hole sand-proof tool of petroleum industry oil, well, particularly sand control letting-in tool and secondary stop-off squeeze pack instrument thereof, can reduce the flow chart of secondary stop-off construction, reduces sand control construction cost.
Background technology
The operating principle of secondary stop-off is: steam injection after sand control or sand control, cause the outer pack gravel of screen casing in debt, affected sand controlling result, do not salvaging on the basis of former sand control pipe, stratum and screen jacket annular space are full of and are tamped with back-up sand, re-establish artificial borehole wall, make fluid enter sand prevention center tube by Radial Flow Through Porous Media, and under reservoir sand is blocked when the artificial borehole wall forming through back-up sand, and form the natural filling sand block barrier away from pit shaft.
Secondary stop-off technology one is to adopt first to salvage the hermetic unit that well packing tool is stayed on sand control pipe top at present, be lowered to again secondary stop-off filling tubing string, to stratum in debt and the large discharge capacity squeezing of screen jacket annular space back-up sand, back-up sand in sand control pipe central tube is rushed to ground, finally beat hollow bridging plug, reseal oil jacket annular space.This secondary stop-off technical tool is simple, but workload is large, and operating efficiency is low.
The 2nd, staying well packing tool bottom to add bearing unit, the hermetic unit on fishing sand-proof tubing string top and finally beat numerous and diverse operation that hollow bridging plug reseals oil jacket annular space while having reduced secondary stop-off.But this secondary stop-off instrument is to add bearing unit in packing tool bottom, packing tool bottom internal diameter before not adding shop bolt is 76mm, after adding shop bolt, internal diameter is reduced into 56mm, washing pipe more than 56mm just cannot be lowered to like this, make to stay the latus rectum of well packing tool to diminish after sand control, affect later stage sand washing operation.
Summary of the invention
The purpose of this utility model is to provide sand control letting-in tool and secondary stop-off squeeze pack instrument thereof, overcome the defect of prior art, guarantee the interior latus rectum of a sand control letting-in tool, guarantee normally carrying out of follow-up sand washing operation and later stage production, shorten construction period, reduce operating cost.
Following technical proposals can reach above-mentioned purpose:
One time sand control letting-in tool comprises central tube, packing element, slips, sealing shroud and filling sand export, in sealing shroud, card has spring, filling sand export is by sealing shroud shutoff, and location fishing head is equipped with in the upper end of central tube, on the fishing head of location, give up shear pin and shop bolt is housed.
For the secondary stop-off squeeze pack instrument of a sand control letting-in tool, comprise that positioning and guiding cover, stop-off central tube, stop-off open cover, circulating flushing sandpipe and washing pipe joint, stop-off is opened to put and is provided with secondary stop-off mouth, the setting corresponding to filling sand export of this secondary stop-off mouth, positioning and guiding puts and is provided with axial vertical slot, and this axial vertical slot coordinates with the shop bolt on the fishing head of location; Positioning and guiding cover, stop-off central tube, stop-off are opened cover, circulating flushing sandpipe and washing pipe joint and are connected successively, and circulating flushing sandpipe is provided with circulation port, and reversing ball is contained in washing pipe joint.
Compared with prior art, the beneficial effects of the utility model are:
A sand control letting-in tool of the present utility model has been located at the upper end of instrument by location fishing head, at oil well, first during sand control, is lowered to this instrument and carries out sand control construction, and give up from location fishing head.While needing secondary stop-off, first the sand in a sand control letting-in tool central tube is rinsed well, be then lowered to secondary stop-off squeeze pack instrument, carry out stop-off construction, after having constructed, trip out secondary stop-off squeeze pack instrument, directly descend pump to produce.Because the utility model is location fishing head to be located to the upper end of a sand control letting-in tool, from this, give up, during secondary stop-off squeeze pack, again by locating fishing head to secondary stop-off squeeze pack tool positioned, the filling sand export of a sand control letting-in tool is opened, do not affect letting-in tool and the interior latus rectum that stays well casing post, guaranteed follow-up sand washing operation and later stage production.Using the utility model is oil-water well sand control and stop-off, and flow chart is few, and short construction period has obvious economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of a sand control letting-in tool of the utility model.
Fig. 2 is the structural representation of the utility model secondary stop-off squeeze pack instrument.
The specific embodiment
Below in conjunction with accompanying drawing in detail the utility model is described in detail, referring to Fig. 1, one time sand control letting-in tool comprises central tube, packing element 3, slips 4, sealing shroud 5 and filling sand export 6, the interior card of sealing shroud 5 has spring 7, filling sand export 6 is by sealing shroud 5 shutoff, location fishing head 2 is equipped with in the upper end of central tube, on the fishing head 2 of location, give up shear pin and shop bolt 1 is housed.From the shear pin of giving up, give up and can and stay well casing post to stay down-hole by this instrument, location fishing head 2 can insert in secondary stop-off squeeze pack instrument, carries out secondary stop-off construction.Give up shear pin and the shop bolt 1 of location on fishing head 2 is at least provided with three, and shop bolt 1 is located at the below of the shear pin of giving up, and the inner circle 2mm-4mm of location fishing head 2 is stretched in its bottom.
Referring to Fig. 2, for the secondary stop-off squeeze pack instrument of a sand control letting-in tool, comprise that positioning and guiding cover 9, stop-off central tube, stop-off open cover 10, circulating flushing sandpipe and washing pipe joint 13, stop-off is opened cover 10 and is provided with secondary stop-off mouth 11, the setting corresponding to filling sand export 6 of this secondary stop-off mouth 11, positioning and guiding cover 9 is provided with axial vertical slot, and this axial vertical slot coordinates with the shop bolt 1 on the fishing head 2 of location; Cover 10 is opened in positioning and guiding cover 9, stop-off central tube, stop-off, circulating flushing sandpipe is connected successively with washing pipe joint 13, and circulating flushing sandpipe is provided with circulation port, and reversing ball 12 is contained in washing pipe joint 13.The top cylindrical of positioning and guiding cover 9 is provided with gear platform, below gear platform, axial vertical slot is set, and axially the groove depth of vertical slot conforms to external diameter with the built-in length of shop bolt 1 with groove width.Stop-off is opened cover 10 bottom cylindrical and is provided with and opens shoulder, and this opens shoulder seat on sealing shroud 5, and secondary stop-off mouth 11 is located at the top of opening shoulder.The top inner circle of washing pipe joint 13 is provided with taper ball seat and coordinates with reversing ball 12.The top inner circle of positioning and guiding cover 9 is equipped with top connection 6 and pressure cap, and top connection 6 is locked in positioning and guiding cover 9 by pressure cap.The circulation port of circulating flushing sandpipe is at least comprised of two vertical slots, is fixed wtih pin in vertical slot, and reversing ball 12 can not be deviate from from sand washing joint 13.
Sand control is given up after having constructed for the first time, and filling sand export 6 is closed, and annular space is sealed by packing element 3, is full of gravel in annular space, and the sand face degree of depth is generally near tell tale screen.Screen casing, annular space gravel and the gravel that is filled to stratum have stopped reservoir sand and have flowed in well like this, and oil well is normally produced.
Due to reasons such as oil well stream-injections, gravel in annular space gravel and stratum is shifted onto at a distance, make near the stratum of annular space and pit shaft in debt, stratum powder fine sand can not effectively be stopped, causes sand production, needs secondary stop-off.Secondary stop-off squeeze pack instrument is connected to the bottom of running string, inserts pressurization in a sand control letting-in tool, stop-off is opened cover 10 filling sand export 6 is opened; Positioning and guiding cover 9 coordinates by its axial vertical slot and shop bolt 1, realize the axial location of filling sand export 6 with the secondary stop-off mouth 11 of secondary stop-off squeeze pack instrument of a sand control letting-in tool, the shoulder of opening of opening on cover 10 by stop-off pushes sealing shroud 5, make secondary stop-off mouth 11 and filling sand export 6 over against, so just can carry out squeeze pack to stratum.After squeeze pack completes, open sleeve gate and carry out flow pack, load fluid from filling sand export 6 and secondary stop-off mouth 11 out, through sand screen, filters pack gravel in sand screen outside, and liquid enters washing pipe joint 13, backs down reversing ball 12, enters screen jacket annular space.Gravel after flow pack completes in backwash flowline, above mentions secondary stop-off squeeze pack instrument; Under the effect of spring 7, the filling sand export 6 of a sand control letting-in tool is closed, complete whole secondary stop-off sand control process.
Claims (8)
1. a sand control letting-in tool, comprises central tube, packing element, slips, sealing shroud and filling sand export, and in sealing shroud, card has spring, filling sand export is by sealing shroud shutoff, it is characterized in that, location fishing head is equipped with in the upper end of central tube, on the fishing head of location, give up shear pin and shop bolt is housed.
2. a sand control letting-in tool as claimed in claim 1, is characterized in that, give up shear pin and the shop bolt of location on fishing head is at least provided with three, and shop bolt is located at the below of the shear pin of giving up, and the inner circle 2mm-4mm of location fishing head is stretched in its bottom.
3. for the secondary stop-off squeeze pack instrument of a sand control letting-in tool described in claim 1, it is characterized in that, comprise that positioning and guiding cover, stop-off central tube, stop-off open cover, circulating flushing sandpipe and washing pipe joint, stop-off is opened to put and is provided with secondary stop-off mouth, the setting corresponding to filling sand export of this secondary stop-off mouth, positioning and guiding puts and is provided with axial vertical slot, and this axial vertical slot coordinates with the shop bolt on the fishing head of location; Positioning and guiding cover, stop-off central tube, stop-off are opened cover, circulating flushing sandpipe and washing pipe joint and are connected successively, and circulating flushing sandpipe is provided with circulation port, and reversing ball is contained in washing pipe joint.
4. secondary stop-off squeeze pack instrument as claimed in claim 3, is characterized in that, the top cylindrical of described positioning and guiding cover is provided with gear platform, below gear platform, axial vertical slot is set, and axially the groove depth of vertical slot conforms to external diameter with the built-in length of shop bolt with groove width.
5. secondary stop-off squeeze pack instrument as claimed in claim 3, is characterized in that, the bottom cylindrical that cover is opened in described stop-off is provided with opens shoulder, and this opens shoulder seat on sealing shroud, and secondary stop-off mouth is located at the top of opening shoulder.
6. secondary stop-off squeeze pack instrument as claimed in claim 3, is characterized in that, the top inner circle of described washing pipe joint is provided with taper ball seat and coordinates with reversing ball.
7. the secondary stop-off squeeze pack instrument as described in claim 3 or 4, is characterized in that, the top inner circle of described positioning and guiding cover is equipped with top connection and pressure cap, and top connection is locked in positioning and guiding cover by pressure cap.
8. secondary stop-off squeeze pack instrument as claimed in claim 3, is characterized in that, the circulation port of described circulating flushing sandpipe is at least comprised of two vertical slots, is fixed wtih pin in vertical slot
.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662443.8U CN203531867U (en) | 2013-10-25 | 2013-10-25 | Primary sand prevention letting-in tool and secondary resanding extruding and filling tool of primary sand prevention letting-in tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662443.8U CN203531867U (en) | 2013-10-25 | 2013-10-25 | Primary sand prevention letting-in tool and secondary resanding extruding and filling tool of primary sand prevention letting-in tool |
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| Publication Number | Publication Date |
|---|---|
| CN203531867U true CN203531867U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320662443.8U Expired - Fee Related CN203531867U (en) | 2013-10-25 | 2013-10-25 | Primary sand prevention letting-in tool and secondary resanding extruding and filling tool of primary sand prevention letting-in tool |
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| CN (1) | CN203531867U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542435A (en) * | 2016-06-29 | 2018-01-05 | 中国石油化工股份有限公司 | The method that selective sand control improves loose sand oil accumulation development effectiveness |
| CN107654220A (en) * | 2017-10-16 | 2018-02-02 | 高瑞民 | A kind of construction method of monoblock type slicing and filling device |
-
2013
- 2013-10-25 CN CN201320662443.8U patent/CN203531867U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542435A (en) * | 2016-06-29 | 2018-01-05 | 中国石油化工股份有限公司 | The method that selective sand control improves loose sand oil accumulation development effectiveness |
| CN107654220A (en) * | 2017-10-16 | 2018-02-02 | 高瑞民 | A kind of construction method of monoblock type slicing and filling device |
| CN107654220B (en) * | 2017-10-16 | 2019-12-06 | 苏州元联科技创业园管理有限公司 | Construction method of integral layered filling device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151201 Address after: 100029 Beijing Chaoyang District Hui Xin a No. twelve layer 6 Patentee after: SINOPEC OILFIELD SERVICE CORPORATION Patentee after: DOWNHOLE OPERATION COMPANY OF SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee before: China Petrochemical Group Corp. Patentee before: DOWNHOLE OPERATION COMPANY OF SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20151025 |
|
| EXPY | Termination of patent right or utility model |