CN2197457Y - Sand filter for oil well - Google Patents
Sand filter for oil well Download PDFInfo
- Publication number
- CN2197457Y CN2197457Y CN 94216998 CN94216998U CN2197457Y CN 2197457 Y CN2197457 Y CN 2197457Y CN 94216998 CN94216998 CN 94216998 CN 94216998 U CN94216998 U CN 94216998U CN 2197457 Y CN2197457 Y CN 2197457Y
- Authority
- CN
- China
- Prior art keywords
- sand
- oil well
- short tube
- sand filter
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Filtration Of Liquid (AREA)
Abstract
The utility model relates to a sand filter for an oil well. The main body of the utility model is composed of a porous short tube (3), a fixed board (4), a double-ended conical body (5), a filter material (6), etc. The utility model can be used by being lowered underground with a production tube column integrally, and can also be used by being thrown underground together with a matched releasing packer. The utility model has the advantages of convenient lowering underground, good sand preventing effect, safe lifting and removing, and low cost, being a sand preventing technique with powerful practicability for oil wells.
Description
The utility model is a kind of downhole tool that is used for oil exploitation.Mainly be applicable to and shake out seriously, need carry out the oil well of sand control again.
The mechanical sand control technology is the most a kind of sand control technology that adopts in the oilfield exploitation.China Patent No. is that 92224076.0 sand control device is state-of-the-art a kind of in the present mechanical sand control technology, but because its manufacturing cost costliness, use is subjected to certain limitation, and in addition, its length reaches two meters, middle filtrate is with on the pipe in manually being wrapped in, intensity is lower, in use, finds that some sand control device filtrate is loose, lose the sand control effect, sand controlling result is produced harmful effect.Other mechanical sand control technology, as the metal wire-wrapped screen sand control device of Shengli Oil Field development and the earthenware sand control device of Zhongyuan Oil Field development, since the filtrate difference, the manufacturing process complexity, the filter sand particle diameter is thick partially, and it is 92224076.0 sand control device that the filter sand effect is inferior to the patent No..
The purpose of this utility model just provides and a kind ofly intensity is improved greatly and simply constructed oil well sand filter.
The utility model can be realized by following proposal: the main body of sand filter mainly by porous short tube (3), consolidate+decide plate (4), double end cone (5), filtrate (6) and constituted, filtrate (6) is pressed between fixed head (4) and the porous short tube (3), the two ends of fixed head (4) are pressed between double end cone (5) and the porous short tube (3), and porous short tube (3) is connected in the two ends of double end cone (5).
The utility model advantage is to make sand filter intensity to improve, thereby improved sand controlling result, oil well is compared with other sand control device with sand filter, manufacturing process is simple, the use filtrate reduces, cost reduces greatly, have go into the well conveniently, sand controlling result is good, trip out safety, cheap characteristics, is the very strong sand control device of a kind of practicality.
Be described further below in conjunction with accompanying drawing.
Fig. 1 is the structure chart of oil well with sand filter.
Fig. 2 is the shape figure of porous short tube and fixed head.
Fig. 3 is the shape figure of double end cone.
The utility model is mainly by top connection (1), adjustable ring (2), porous short tube (3), fixed head (4), double end cone (5), filtrate (6), lower contact (7), decylization (8), pin (9), outer tube formations such as (10).There is pin thread screw thread (11) at porous short tube (3) two ends, and periphery has several trough (12), and several through holes (13) are arranged in the groove, and there is the conical surface (14) at the fixed head two ends, and there is through hole (15) centre.There are the conical surface (16) and box screw thread (17) in double end cone (5) two ends.The assembling of oil well sand filter is that filtrate (6) is pressed in fixed head (4) in the groove (12) of porous short tube (3), with the pin thread screw thread (11) of porous short tube (3) and the box thread connection of top connection (1) one end and its coupling; Pin thread screw thread (11) with porous short tube (3) other end connects with the box screw thread (17) of double end cone (5) then, the two ends of fixed head (4) are pressed between double end cone (5) and the porous short tube (3), with instrument screw thread is screwed, screw thread screws in the process, double end cone (5) contacts with the conical surface (16), the conical surface (14) on the fixed head (4), produce inside radial load, filtrate (6) is fixed between fixed head (4) and the porous short tube (3) firmly, forms a joint sand screen.According to above-mentioned steps, length by required sand filter, can adorn some joint sand screens successively, at last the pin thread screw thread (11) of porous short tube (3) and the box thread connection of lower contact (7) one ends and its coupling be screwed: again adjustable ring (2), outer tube (10), decylization (8), pin (9) are loaded onto successively.Generally speaking, oil well can be connected on the lower end of oil well pump with sand filter, together with oil well production string together G.I.H use.Concrete grammar is: termination sand filter under the back-off packer, packer is connected on the tubing string, to the degree of depth of the interior demand of well, will lose after the packer set in the well down, trips out the above tubing string of packer then, is lowered to the flow string of band oil well pump again.That is: the hole of the hole of oil reservoir liquid by fixed head (4), filtrate (6), porous short tube (3) enters in the flow string, is extracted into by oil well pump and advances oil vessel in the surface line.With the sand that oil reservoir liquid comes out, be filtered to the pit shaft bottom, play the filter sand effect.Filtrate (6) is selected according to the size of sand grains diameter, and the sand grains of different-diameter is selected the filtrate (6) of different meshes for use, to satisfy the multiple requirement of sand control in the oil well production process.Oil well in use may run into this situation with sand filter, and because of sand production in oil is serious, sand filter is buried by sand.And oil well production inspection pump or when tripping out sand filter requires tubing string must trip out pit shaft.Oil well is that friable material (pottery, duroplasts etc.) is made with the outer tube (10) of sand filter.As run into the situation that above-mentioned sand buries, and when tripping out tubing string, the upper lifting pipe post reaches certain load, and pin (9) is sheared, and decylization (8) and outer tube (10) are stayed the down-hole with sand.Shiny surface contacts between sand filter main part and the outer tube (10), and frictional resistance is little, trips out pit shaft in company with one of flow string.Stay the outer tube of down-hole, can bore its fragmentation down again, then broken thing and sand are flushed out pit shaft.Like this, both guarantee to satisfy the requirement that flow string must trip out pit shaft, do not influenced the enforcement of step production measure down again.
Claims (4)
1, a kind of oil well sand filter, mainly by top connection (1), adjustable ring (2), porous short tube (3), fixed head (4), double end cone (5), filtrate (6), lower contact (7), decylization (8), pin (9), outer tube formations such as (10), it is characterized in that: filtrate (6) is pressed between fixed head (4) and the porous short tube (3), the two ends of fixed head (4) are pressed between double end cone (5) and the porous short tube (3), and porous short tube (3) is connected in the two ends of double end cone (5);
2, oil well sand filter according to claim 1 is characterized in that: there is pin thread screw thread (11) at porous short tube (3) two ends, and periphery has several trough (12), and some through holes (13) are arranged in the groove.
3, oil well sand filter according to claim 1 is characterized in that: there is the conical surface (14) at fixed head (4) two ends, and there is through hole (15) centre.
4, oil well sand filter according to claim 1 is characterized in that: there are the conical surface (16) and box screw thread (17) in double end cone (5) two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94216998 CN2197457Y (en) | 1994-07-20 | 1994-07-20 | Sand filter for oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94216998 CN2197457Y (en) | 1994-07-20 | 1994-07-20 | Sand filter for oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2197457Y true CN2197457Y (en) | 1995-05-17 |
Family
ID=33832554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94216998 Expired - Fee Related CN2197457Y (en) | 1994-07-20 | 1994-07-20 | Sand filter for oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2197457Y (en) |
-
1994
- 1994-07-20 CN CN 94216998 patent/CN2197457Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |