CN202731825U - Core shaft type closed oil pipe shoe - Google Patents
Core shaft type closed oil pipe shoe Download PDFInfo
- Publication number
- CN202731825U CN202731825U CN 201220242907 CN201220242907U CN202731825U CN 202731825 U CN202731825 U CN 202731825U CN 201220242907 CN201220242907 CN 201220242907 CN 201220242907 U CN201220242907 U CN 201220242907U CN 202731825 U CN202731825 U CN 202731825U
- Authority
- CN
- China
- Prior art keywords
- mandrel
- core shaft
- seating nipple
- leather cup
- oil pipe
- 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 - Lifetime
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Abstract
The utility model relates to a core shaft type closed oil pipe shoe, which is formed by a working cylinder (1) and a core shaft body, wherein the core shaft body is formed by a leather cup pressing cap (2), a leather cup (3), a core shaft (4), a spring pressing cap (5), a resetting spring (6), a core shaft body limiting sleeve (7) and a sealing rubber ring (9), wherein the core shaft (4) is a four-grade circular bead shaft; the leather cup (3) is fixedly arranged on the core shaft (4) by the leather cup pressing cap (2) through a screw thread; the spring pressing cap (5) is in threaded connection with the core shaft (4); the core shaft body limiting sleeve (7) is sleeved on the core shaft (4); the resetting spring (6) is sleeved between the spring pressing cap (5) and the core shaft body limiting sleeve (7); a core shaft body is fixedly arranged inside the working cylinder (1) through a cutting pin (8); and the core shaft body and the working cylinder (1) realize sealing through the sealing rubber ring (9). The tool disclosed by the utility model can realize an oil pipe inner plugging function; and meanwhile, well bottom dropped materials are not caused and oil layer test work can be carried out through an oil passing pipe of a water injection well.
Description
Technical field
The utility model relates to the interior blowout hookup of tubing string that a kind of Operating Pressure process is used.
Background technology
At present, in the operation of Operating Pressure lower tubular column, usually use ball-and-seat or the formula tail of spraining stifled as interior jet-preventing tool, ball-and-seat inside is equipped with the parts such as non-return valve block and back-moving spring, because the obstruction of the parts such as non-return valve block and back-moving spring, tester can not pass through ball-and-seat, uses ball-and-seat as completion tool, owing to the obstruction of ball-and-seat, tester can not be realized the oil reservoir test jobs by oil pipe after the completion; The formula tail of spraining is stifled to be comprised of seating nipple and plugging block, the well head pressure of spraining after the completion, and the plugging block of spraining is set up waterflood path, but plugging block need fall into the shaft bottom, causes bottom hole falling article.
The utility model content
Defective for above-mentioned prior art existence, the technical problems to be solved in the utility model provides a kind of mandrel type closed oil pipe footwear, can realize under the operating mode with pressure stopping up function in the oil pipe, and after completion, can satisfy flooding production and tester is crossed oil pipe oil reservoir test jobs.
For solving the problems of the technologies described above, the utility model mandrel type closed oil pipe footwear, formed by seating nipple 1 and mandrel body, above-mentioned mandrel body is comprised of leather cup pressure cap 2, leather cup 3, mandrel 4, spring pressure cap 5, back-moving spring 6, mandrel body stop collar 7 and O-ring seal 9, wherein, above-mentioned mandrel 4 is 4 grades of shoulder axles, and this axle from top to bottom diameter of axle becomes greatly step by step, and above-mentioned leather cup pressure cap 2 is fixed tightly in leather cup 3 on the thinnest end of mandrel 4 diameters by screw thread; Above-mentioned spring pressure cap 5 is threaded in mandrel 4 second level and is close on the third level shoulder; Above-mentioned mandrel body stop collar 7 is sleeved on mandrel 4 third level and is close on the fourth stage shoulder, but itself and mandrel 4 relative slidings, and these mandrel body stop collar 7 internal diameters are less than mandrel 4 the thickest part external diameters; Above-mentioned back-moving spring 6 is sleeved on the mandrel 4 between spring pressure cap 5 and the mandrel stop collar 7, take mandrel body stop collar 7 as fulcrum, and the cushion effect that provides a relative mandrel body stop collar 7 upwards to reset for the mandrel body; Above-mentioned seating nipple 1 is sealed and matched with the thickest end of mandrel 4 diameters partly has one section to the shoulder of inner process, latus rectum is less than latus rectum in seating nipple 1 other parts in seating nipple 1 this part, latus rectum in mandrel body stop collar 7 external diameters are sealed and matched partly greater than seating nipple 1 and mandrel 4 is less than latus rectum in seating nipple 1 other parts; Above-mentioned mandrel body is fixed on seating nipple 1 inside by shear pin 8, and this mandrel body and seating nipple 1 are realized sealing by O-ring seal 9.
Above-mentioned seating nipple 1 upper end is threaded with top connection 10.
Above-mentioned O-ring seal 9 is sleeved in the groove of mandrel 4 lower ends.
Adopt the technical program, the utility model device is connected to oil pipe lower end G.I.H, can realize stopping up in the operating mode tubing string with pressure function, can realize by the mode that well head is suppressed the recovery of sealed core axis body after the completion, reach the completion tubular column internal diameter unobstructed, without the accessory well that falls, can satisfy the needs that later stage flooding production and tester are crossed the operations such as oil pipe oil reservoir test.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.
Fig. 1 is the structural representation of the utility model mandrel type closed oil pipe footwear.
The specific embodiment
As shown in Figure 1, the utility model mandrel type closed oil pipe footwear are comprised of seating nipple 1 and mandrel body, the mandrel body is by leather cup pressure cap 2, leather cup 3, mandrel 4, spring pressure cap 5, back-moving spring 6, mandrel body stop collar 7 and O-ring seal 9 form, the mandrel body is fixed on seating nipple 1 inside by shear pin 8, the mandrel body is realized sealing by O-ring seal 9 and seating nipple 1, this device is connected to oil pipe lower end G.I.H by top connection 10, the shear force that the impact force that produces in well pressure and the lower tubular column process is set much smaller than shear pin 8, so shear pin 8 can not be cut off, to realize stopping up function in the tubing string.Shear pin 8 can be selected according to well pressure situation the pin of different-diameter, to satisfy the needs of different pressures situation.Tubing string is lowered in the process, whenever is lowered to the 200m tubing string, fills clear water in tubing string, to reduce the oil pipe inside and outside differential pressure to the shear action of shear pin.
Tubing string is behind the precalculated position, assemble production tree, suppress from oil pipe inside, pressure-acting is on the mandrel body, form downward thrust, cause the relative seating nipple 1 of mandrel body to move downward, shear pin 8 is cut off, mandrel body and seating nipple 1 release break away from, the relative mandrel body of while mandrel body stop collar 7 down slidings, spring pressure cap 5 compression reseting springs 6, cut off moment compressed back-moving spring 6 cushion effect that provides a relative mandrel body stop collar 7 upwards to reset for the mandrel body at shear pin 8, because mandrel body stop collar 7 external diameters are greater than the be sealed and matched internal diameter of part of seating nipple 1 and mandrel body, so the mandrel body can not pass seating nipple and fall in the well, rely on this moment borehole pressure or anti-flushing well to make liquid upwards promote leather cup 3 along the oil pipe bottom, the mandrel body is carried into ground, set up the oil pipe passage, seating nipple 1 can satisfy the later stage flooding production and tester is crossed the needs of the operations such as oil pipe oil reservoir test.
Claims (3)
1. mandrel type closed oil pipe footwear, formed by seating nipple (1) and mandrel body, described mandrel body is comprised of leather cup pressure cap (2), leather cup (3), mandrel (4), spring pressure cap (5), back-moving spring (6), mandrel body stop collar (7) and O-ring seal (9), it is characterized in that: described mandrel (4) is 4 grades of shoulder axles, this axle from top to bottom diameter of axle becomes greatly step by step, and described leather cup pressure cap (2) is fixed tightly in leather cup (3) on the thinnest end of mandrel (4) diameter by screw thread; Described spring pressure cap (5) is threaded in mandrel (4) second level and is close on the third level shoulder; Described mandrel body stop collar (7) is sleeved on mandrel (4) third level and is close on the fourth stage shoulder, itself and mandrel (4) but relative sliding, this mandrel body stop collar (7) internal diameter is less than the thickest part external diameter of mandrel (4); Described back-moving spring (6) is sleeved on the mandrel (4) between spring pressure cap (5) and the mandrel stop collar (7), take mandrel body stop collar (7) as fulcrum; Described seating nipple (1) is sealed and matched with the thickest end of mandrel (4) diameter partly has one section to the shoulder of inner process, latus rectum is less than latus rectum in seating nipple (1) other parts in this part of seating nipple (1), latus rectum in mandrel body stop collar (7) external diameter is sealed and matched partly greater than seating nipple (1) and mandrel (4) is less than latus rectum in seating nipple (1) other parts; Described mandrel body is fixed on seating nipple (1) inside by shear pin (8), and this mandrel body and seating nipple (1) are realized sealing by O-ring seal (9).
2. mandrel type closed oil pipe footwear according to claim 1 is characterized in that: be threaded with top connection (10) on the described seating nipple (1).
3. mandrel type closed oil pipe footwear according to claim 1, it is characterized in that: described O-ring seal (9) is sleeved in the groove of mandrel (4) lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220242907 CN202731825U (en) | 2012-05-28 | 2012-05-28 | Core shaft type closed oil pipe shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220242907 CN202731825U (en) | 2012-05-28 | 2012-05-28 | Core shaft type closed oil pipe shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202731825U true CN202731825U (en) | 2013-02-13 |
Family
ID=47657537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220242907 Expired - Lifetime CN202731825U (en) | 2012-05-28 | 2012-05-28 | Core shaft type closed oil pipe shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202731825U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452518A (en) * | 2012-05-28 | 2013-12-18 | 中国石油天然气股份有限公司 | Core shaft type sealed oil pipe shoes |
-
2012
- 2012-05-28 CN CN 201220242907 patent/CN202731825U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452518A (en) * | 2012-05-28 | 2013-12-18 | 中国石油天然气股份有限公司 | Core shaft type sealed oil pipe shoes |
| CN103452518B (en) * | 2012-05-28 | 2016-04-06 | 中国石油天然气股份有限公司 | Mandrel type closed oil pipe footwear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130213 Effective date of abandoning: 20160406 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |