CN103670314A - Sand prevention hydraulic anchor - Google Patents
Sand prevention hydraulic anchor Download PDFInfo
- Publication number
- CN103670314A CN103670314A CN201210351572.5A CN201210351572A CN103670314A CN 103670314 A CN103670314 A CN 103670314A CN 201210351572 A CN201210351572 A CN 201210351572A CN 103670314 A CN103670314 A CN 103670314A
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- anchor
- sealing ring
- sand
- jaw
- press plate
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Abstract
A sand prevention hydraulic anchor comprises an anchor body, a sealing ring, a sealing ring A, an anchor jaw, a press plate, an outer spring, an inner spring, a press plate screw, a sand prevention insertion pipe and a sand filtering screen. The sealing ring is embedded into an inner sealing groove of the anchor body, and the sand filtering screen is sleeved on the outer cylindrical face of the sand prevention insertion pipe and is screwed through inner threads in the anchor body. An outer sealing groove is formed in the anchor jaw, the sealing ring A is embedded into the outer sealing groove of the anchor jaw, an inner spring and an outer spring are sequentially arranged in an inner hole of the anchor jaw, the anchor jaw is installed in the hole of the anchor jaw along the axial direction of the anchor body, and the press plate is pressed in a press plate groove of the anchor body to prevent the anchor jaw from stretching out and is fixed through the press plate screw. When hydraulic pressure is added from the inside of an oil pipe, the anchor jaw compresses the springs under the hydraulic pressure effect and is pushed to the inner wall of the sleeve and clamped firmly on the inner wall of the sleeve to achieve the aim of fixing a pipe column. When the pressure in the oil pipe is released, the anchor jaw retreats under the effect of the springs, and clamping is released. The hydraulic anchor is reasonable in structure design, simple and convenient to install and saves production cost.
Description
Technical field
The invention belongs to oil field equipment, relate to a kind of down-hole string anchoring device, specifically, particularly relate to a kind of sand-proof hydraulic anchor of producing for oil gas field.
Background technology
Late period of oil field, difficult exploiting field piece increases, and water injection pressure is high, seperated layer water injection, layering squeezing down-hole string technology status more complicated.And at present layered waterflooding packer is generally used in oil field, ground experiment proves, pressure fluctuates in the scope of 5～25MPa, and packer is wriggled 4～5 times, and the packing element of packer lost efficacy, and had had a strong impact on oil field and had normally produced.In order to solve the wriggling problem of water injection string, hydraulic anchor, as a kind of down-hole string anchoring device, is often used in the process pipe strings such as fracture in oil and water wells, acidifying tubing string is fixed, and improves the poor ability of pressure-bearing of downhole tool and tubing string.But due to the defect in conventional hydraulic anchor structure design; anchor fluke to be fixed on the anchor fluke hole of main body by pressing plate and firm screw; the problems referred to above have been solved to a certain extent; but due to its unreasonable structure; cause install and use loaded down with trivial details; the problems such as inefficiency; its anchor tooth reclaims and often because sand card causes, can not normally reclaim; produce and stop up anchor hole; working string can not normally be tripped out; even cause oil-water well heavy repair task, solve problems and must hydraulic anchor structure design, thoroughly eliminate accident potential.
Summary of the invention
Object of the present invention provides a kind of fixing tubing string while being mainly used in pressing crack construction, and in the time of effectively preventing from adding sand, stop up anchor hole, can avoid in work progress impact when shaft bottom sandstone is on the normal operating of anchor tooth, make hydraulic anchor a kind of sand-proof hydraulic anchor of producing for oil gas field of service-strong more.
The present invention is achieved by the following technical solutions:
A kind of sand-proof hydraulic anchor, comprise anchor body, sealing ring, sealing ring A, anchor fluke, pressing plate, outer spring, inner spring, bridge screw, sand control intubate, filter sand net, it is characterized in that described anchor body is provided with interior seal groove and pressing plate groove, described sealing ring A has three, described anchor fluke has three, described bridge screw has four, described inner spring, outer spring have respectively three groups, sealing ring is embedded in the interior seal groove of anchor body, filter sand net, to the external cylindrical surface of sand control intubate, is then connected and tightened by anchor body internal thread.Anchor fluke is provided with external seal groove, sealing ring A is embedded on the external seal groove of anchor fluke, puts into successively inner spring, outer spring in the endoporus of anchor fluke, and by anchor fluke along anchor axon to being installed in anchor fluke hole, pressing plate is pressed onto in the pressing plate groove of anchor body, blocks anchor fluke and stretch out, and fix with bridge screw.
Groundwork principle of the present invention is for to increase hydraulic pressure in oil pipe, anchor fluke under the effect of hydraulic pressure, Compress Spring, and be pushed to internal surface of sleeve pipe and block jail on the inwall of sleeve pipe, thereby play the fixedly object of tubing string, when bleeding off the pressure of oil pipe, anchor fluke, under the effect of spring, is return unfreezing.
Usefulness of the present invention is:
A kind of sand-proof hydraulic anchor of the present invention, its filter sand net is to the external cylindrical surface of sand control intubate, can stop larger sandstone to enter anchor body space, in the time of effectively preventing from adding sand, stop up anchor hole, pressing plate is pressed onto in the pressing plate groove of anchor body, blocked stretching out of anchor fluke, hydraulic anchor is reclaimed reliable, guarantee that less sandstone can not arrive the bottom of anchor, thereby avoid the sand card problem in job engineering, by said structure, guaranteed the reliability that hydraulic anchor reclaims.Its reasonable in design, makes that device is simple, use cost is low, easy for installation, has saved the cost of production of device.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In Fig. 1: 1-anchor body, 2-sealing ring, 3-sealing ring A, 4-anchor fluke, 5-pressing plate, 6-outer spring, 7-inner spring, 8-bridge screw, 9-sand control intubate, 10-filter sand net.
The specific embodiment
A kind of sand-proof hydraulic anchor, comprise anchor body 1, sealing ring 2, sealing ring A3, anchor fluke 4, pressing plate 5, outer spring 6, inner spring 7, bridge screw 8, sand control intubate 9, filter sand net 10, it is characterized in that described anchor body 1 is provided with interior seal groove and pressing plate groove, described sealing ring A3 has three, described anchor fluke 4 has three, described bridge screw 8 has four, described inner spring 7, outer spring 6 has respectively three groups, sealing ring 2 is embedded in the interior seal groove of anchor body 1, filter sand net 10 is set on the external cylindrical surface of sand control intubate 9, then the internal thread connection by anchor body 1 tightens.Anchor fluke 4 is provided with external seal groove, sealing ring A3 is embedded into respectively on the external seal groove of anchor fluke 4, in the endoporus of anchor fluke 4, put into successively inner spring 7, outer spring 6, and anchor fluke 4 is axially installed in anchor fluke hole along anchor body 1, pressing plate 5 is pressed onto in the pressing plate groove of anchor body 1, block stretching out of anchor fluke 4, and fixing with bridge screw 8.
Claims (3)
1. a sand-proof hydraulic anchor, comprise anchor body, sealing ring, sealing ring A, anchor fluke, pressing plate, outer spring, inner spring, bridge screw, sand control intubate, filter sand net, it is characterized in that described anchor body is provided with interior seal groove and pressing plate groove, described anchor fluke is provided with external seal groove, described sealing ring A has three, described anchor fluke has three, and described bridge screw has four, and described inner spring, outer spring have respectively three groups.
2. a kind of sand-proof hydraulic anchor according to claim 1, is characterized in that described sealing ring is embedded in the interior seal groove of anchor body, and filter sand net, to the external cylindrical surface of sand control intubate, is connected and tightened by anchor body internal thread.
3. a kind of sand-proof hydraulic anchor according to claim 1, it is characterized in that described sealing ring A is embedded on the external seal groove of anchor fluke, in the endoporus of anchor fluke, put into successively inner spring, outer spring, by anchor fluke along anchor axon to being installed in anchor fluke hole, pressing plate is pressed onto in the pressing plate groove of anchor body, with bridge screw, fixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351572.5A CN103670314A (en) | 2012-09-19 | 2012-09-19 | Sand prevention hydraulic anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351572.5A CN103670314A (en) | 2012-09-19 | 2012-09-19 | Sand prevention hydraulic anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103670314A true CN103670314A (en) | 2014-03-26 |
Family
ID=50309004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210351572.5A Pending CN103670314A (en) | 2012-09-19 | 2012-09-19 | Sand prevention hydraulic anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103670314A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963639A (en) * | 2015-06-16 | 2015-10-07 | 中国石油天然气股份有限公司 | Underground torque control tool for milling operation |
| CN108166942A (en) * | 2018-02-13 | 2018-06-15 | 盐城市鑫源石化机械有限公司 | Pressure cap formula nonmetal water power anchor |
| CN110965951A (en) * | 2019-11-27 | 2020-04-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Large-drift-diameter hydraulic anchor and using method thereof |
-
2012
- 2012-09-19 CN CN201210351572.5A patent/CN103670314A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963639A (en) * | 2015-06-16 | 2015-10-07 | 中国石油天然气股份有限公司 | Underground torque control tool for milling operation |
| CN108166942A (en) * | 2018-02-13 | 2018-06-15 | 盐城市鑫源石化机械有限公司 | Pressure cap formula nonmetal water power anchor |
| CN110965951A (en) * | 2019-11-27 | 2020-04-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Large-drift-diameter hydraulic anchor and using method thereof |
| CN110965951B (en) * | 2019-11-27 | 2024-01-23 | 中国石油天然气集团有限公司 | Large-drift-diameter hydraulic anchor and use method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |