CN203296748U - Novel float collar float shoe for horizontal well - Google Patents
Novel float collar float shoe for horizontal well Download PDFInfo
- Publication number
- CN203296748U CN203296748U CN2013203609239U CN201320360923U CN203296748U CN 203296748 U CN203296748 U CN 203296748U CN 2013203609239 U CN2013203609239 U CN 2013203609239U CN 201320360923 U CN201320360923 U CN 201320360923U CN 203296748 U CN203296748 U CN 203296748U
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- Prior art keywords
- float
- spring
- float collar
- shoe
- collar
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- 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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- 239000003208 petroleum Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000005987 sulfurization reaction Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000004568 cement Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 206010034133 Pathogen resistance Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
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- Float Valves (AREA)
- Check Valves (AREA)
Abstract
The utility model provides a novel float collar float shoe for a horizontal well. The float collar float shoe comprises a float collar body and a float shoe body and is characterized in that threads are turned at the upper end and the lower end of the float collar body to enable the two ends to be connected with petroleum sleeves. Threads are turned at the upper end of the float shoe body to enable the upper end to be connected with a petroleum sleeve, and a conical or spherical guiding shoe is welded at the lower end. A ball seat, a valve ball, a spring seat, a centralizing plate, a sliding rod, an inner ring, an outer ring, a spring protection tube and a baffle are sequentially installed in the float collar body and the float shoe body. The valve ball and the sliding rod are connected with the upper end and the lower end of the spring seat respectively through threads and sealed with the ball seat through rubber vulcanized on the valve ball and central holes in the centralizing plate, the baffle and the spring protection tube. The outer spring and the inner spring are sleeved on the sliding rod and located in the inner cavity of the spring protection tube, one end of each of the inner spring and the outer spring is located in an annular groove of the spring seat, and the other ends are located in an annular groove of the baffle. Two ends of the spring protection tube are welded with a balance plate and the baffle respectively. The novel float collar float shoe can overcome the shortcoming that a common float collar float shoe is not at the center under the horizontal working condition, the springs lose efficacy and cannot be reset effectively and a sealing effect is poor, improves cutoff success rate after cement injection operation is finished and ensures well cementation quality of the horizontal well.
Description
Technical field
The utility model relates to the solid completion practice of oil field development field horizontal well used, particularly the float collar float plug device of horizontal well casing pipe string foot.
Background technology
In the cementing operation of completion, float collar float plug is bottom device in bunch tube, and its performance directly affects cementing quality, only just can guarantee the completion quality under the prerequisite of float collar float plug dependable performance.The relative level well, because casing programme is special, operating mode changes, and facts have proved that conventional its performance of float collar float plug can't meet its construction requirement, and its result causes cementing quality not reach the completion requirement, and postorder is remedied needs a large amount of manpower and financial support.Necessary with float collar float plug for guaranteeing a kind of horizontal well of pit shaft cementing quality design.
Denomination of invention is " horizontal well float collar float plug ", the patent No.: 201220518192.1, exist following deficiency:
1, after cementing job finished, valve ball returned not in place, and the well head cutout is not thorough;
2, the float collar float plug hydrophthalmia easily stops up.
For above deficiency, the design of the float collar float plug that breaks traditions, redesign with the float collar float plug structure horizontal well, guarantees to meet the well cementing operation of horizontal well.
The utility model content
The purpose of this utility model is to provide a kind of New Horizontal Well float collar float plug, can prevent the deficiency of conventional float collar float plug, guarantees the cementing quality of horizontal well.
The technical solution of the utility model is that a kind of New Horizontal Well float collar float plug, comprise float collar body and float shoe body, it is characterized in that two ends, float collar body up and down car has screw thread to be connected with petroleum casing pipe; Float shoe body upper end car has screw thread to be connected with petroleum casing pipe, and lower end is welded with the guide shoe of pyramidal structure; Ball seat, valve ball, spring base, righting board, slide bar, interior outer spring, spring protection cylinder and baffle plate are housed in float collar body and float shoe body successively, wherein valve ball is connected with the upper and lower side of spring base respectively by screw thread with slide bar, and by center and the ball seat of righting board, spring protection cylinder and baffle plate, by the rubber of sulfuration on valve ball, seals; Outer spring and inner spring are enclosed within on slide bar; be arranged in the spring protection tube inner chamber, outer spring and inner spring one are sat up straight in the annular groove of spring base, and the other end is seated in the annular groove of baffle plate; weld mutually with righting board and baffle plate respectively at the two ends of spring protection cylinder, and baffle plate and body are threaded connection.
Described ball seat external diameter is connected with the float collar float plug body by screw thread, and smear the curing adhesive curing on screw thread, the ball seat heart is conical surface shape, the maximum gauge steering vehicle has seal groove, and the heart conical surface and valve ball guarantee to vulcanize rubber on valve ball and the identical sealing of ball seat by the location of righting board and baffle plate centre bore.
Described righting board is axially arranged with spout, and external diameter is less than the internal diameter of float collar float plug body.
Described baffle plate is axially arranged with liquid flow hole, and external diameter is connected with the float collar float plug body by screw thread.
Described guide shoe upper end is furnished with liquid flow hole in the radial direction, heart section hollow.
Advantage of the present utility model:
1, reliable valve ball valve system, make cement paste or slurry flows cross resistance little.
2, the spacing spring fatigue of avoiding of valve ball lost efficacy, and ball seat and rubber seal can prevent effectively that cement paste from flowing backwards.
3, the spring protection cylinder can effectively be isolated impurity, guarantees the spring active homing.
4, with two righting mechanisms of righting board, righting board does not move, and has avoided the impact of sand setting, guarantee in and sealing performance.
Description of drawings
Fig. 1 is structural representation of the present utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, float collar body 1 upper and lower side car has the upper end car of screw thread, float shoe body 11 that screw thread is arranged, and is used for connecting tubing and casing; Guide shoe 12 lower ends are a pyramidal structure, are convenient to guiding tool and enter well.
The two ends up and down of float collar body 1 are connected with tubing and casing by screw thread, and the upper end of float shoe body 11 is connected with tubing and casing by screw thread, and lower end is welded with the guide shoe 12 of pyramidal structure.Ball seat 2, valve ball 3, spring base 4, righting board 5, outer spring 6, slide bar 7, inner spring 8, spring protection cylinder 9 and baffle plate 10 are housed in float collar body 1, float shoe body 11 successively, wherein valve ball 3 is connected with the upper and lower side of spring base 4 respectively by screw thread with slide bar 7, and guarantees the sealing of valve ball 3 and ball seat 2 by the location of righting board 5 and baffle plate 10 centre bores; Outer spring 6 and inner spring 8 are enclosed within on slide bar 7; outer spring 6 and inner spring 8 one are sat up straight in the annular groove of righting board 5; the other end is seated in the annular groove of baffle plate 10, and weld mutually with balance plate and baffle plate 10 respectively at the two ends of spring protection cylinder 9, and baffle plate 10 is threaded connection with body.
That spring base 4 and spring protection cylinder 9 have is spacing, the effect of isolation impurity, avoids spring fatigue to lose efficacy, and guarantees valve ball 3 cutout that puts in place.
Wherein valve ball 3, spring base 4, slide bar 7 are etch-proof nonferrous materials.Righting board 5 is axially arranged with spout, and external diameter is less than the internal diameter of float collar float plug body.Baffle plate 10 is axially arranged with liquid flow hole, and external diameter is connected with the float collar float plug body by screw thread.Guide shoe 12 upper ends are furnished with liquid flow hole in the radial direction, heart section hollow.Ball seat 2 external diameters are connected with the float collar float plug body by screw thread, and ball seat 2 hearts are conical surface shape, and the maximum gauge steering vehicle has seal groove, and the heart conical surface and valve ball 3 coincide and seal by the rubber of sulfuration on valve ball.
The horizontal well float collar float plug course of work is as follows:
1) the horizontal well float collar float plug is connected to the bunch tube bottom and is lowered to pit shaft, be lowered to process consistent with conventional well, valve ball 3 is in closed condition.
While 2) carrying out cementing job, greater than the pipe external pressure, overpressure can back down valve ball 3 due to float collar body 1, float shoe body 11 internal pressures, and cement paste flows to casing annulus in sleeve pipe.
3) after cementing job finished, well head bled off pressure, and valve ball 3 can be closed under the effect of spring, made the outer cement paste of sleeve pipe can not be back in sleeve pipe.
4) because horizontal well float collar float plug operating mode is level, reliability is by three promises: the one, and outer spring 6 and inner spring 8 guarantee to close to reset; The 2nd, righting board 5, slide bar 7, baffle plate 10 guarantee placed in the middle; The 3rd, the vulcanized rubber on valve ball 3 guarantees sealing; The 4th, the spacing spring fatigue of avoiding of valve ball 3 lost efficacy, and spring protection cylinder 9 guarantees that spring is not wound around and lost efficacy by impurity.
Claims (5)
1. New Horizontal Well float collar float plug: comprise float collar body and float shoe body, it is characterized in that two ends, float collar body (1) up and down car has screw thread to be connected with petroleum casing pipe, float shoe body (11) upper end car has screw thread to be connected with petroleum casing pipe, and lower end is welded with the guide shoe (12) of pyramidal structure, in float collar body (1) and float shoe body (11), ball seat (2) is housed successively, valve ball (3), spring base (4), righting board (5), outer spring (6), slide bar (7), inner spring (8), spring protection cylinder (9) and baffle plate (10), wherein valve ball (3) is connected with the upper and lower side of spring base (4) respectively by screw thread with slide bar (7), and by righting board (5), the center of spring protection cylinder (9) and baffle plate (10) and ball seat (2) seal by the rubber of sulfuration on valve ball (3), outer spring (6) and inner spring (8) are enclosed within slide bar (7) upward and are arranged in spring protection cylinder (9) inner chamber, outer spring (6) and inner spring (8) are sat up straight in the annular groove of righting board (5), the other end is seated in the annular groove of baffle plate (10), weld mutually with righting board and baffle plate respectively at the two ends of spring protection cylinder, baffle plate (10) and float collar body (1), float shoe body (11) is threaded connection.
2. New Horizontal Well float collar float plug as claimed in claim 1, it is characterized in that described ball seat (2) external diameter is connected with the float collar float plug body by screw thread, and smear the curing adhesive curing on screw thread, ball seat (2) heart is conical surface shape, the maximum gauge steering vehicle has seal groove, and ball seat (2) the heart conical surface and valve ball (3) guarantee to vulcanize rubber on valve ball and the identical sealing of ball seat by the location of righting board (5) and baffle plate (10) centre bore.
3. New Horizontal Well float collar float plug as claimed in claim 1, is characterized in that described righting board (5) is axially arranged with spout, and external diameter is less than the internal diameter of float collar float plug body.
4. New Horizontal Well float collar float plug as claimed in claim 1, is characterized in that guide shoe (12) upper end is furnished with liquid flow hole, heart section hollow in the radial direction.
5. New Horizontal Well float collar float plug as claimed in claim 1, is characterized in that described baffle plate (10) is axially arranged with liquid flow hole, and external diameter is connected with the float collar float plug body by screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203609239U CN203296748U (en) | 2013-06-21 | 2013-06-21 | Novel float collar float shoe for horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203609239U CN203296748U (en) | 2013-06-21 | 2013-06-21 | Novel float collar float shoe for horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203296748U true CN203296748U (en) | 2013-11-20 |
Family
ID=49572766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203609239U Expired - Fee Related CN203296748U (en) | 2013-06-21 | 2013-06-21 | Novel float collar float shoe for horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203296748U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155964A (en) * | 2020-03-10 | 2020-05-15 | 何华 | A exempt from to bore stopper cementing ware for oil development |
-
2013
- 2013-06-21 CN CN2013203609239U patent/CN203296748U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155964A (en) * | 2020-03-10 | 2020-05-15 | 何华 | A exempt from to bore stopper cementing ware for oil development |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |
|
| CU01 | Correction of utility model | ||
| CU01 | Correction of utility model |
Correction item: Termination upon expiration of patent Correct: Revocation of Patent Expiration and Termination False: Expiration and Termination of 39 Volume 2801 Patent on July 11, 2023 Number: 28-01 Volume: 39 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 |