CN211173983U - Oil well tubular column buckle formula safety joint - Google Patents
Oil well tubular column buckle formula safety joint Download PDFInfo
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- CN211173983U CN211173983U CN201922282793.1U CN201922282793U CN211173983U CN 211173983 U CN211173983 U CN 211173983U CN 201922282793 U CN201922282793 U CN 201922282793U CN 211173983 U CN211173983 U CN 211173983U
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Abstract
The utility model discloses an oil well tubular column buckle type safety joint, which comprises an upper joint, a lower joint, a sealing ring and a soluble pin, wherein the upper joint is provided with a plurality of symmetrical and uniformly distributed clamping blocks, and the lower joint is provided with a clamping groove matched with the clamping blocks; under the stable state of connection, the fixture block is fixed in the draw-in groove, makes top connection and lower clutch link together, places the sealing washer between top connection and the lower clutch, seals up the clearance between top connection and the lower clutch. The utility model discloses guaranteed high-pressure seal, improved joint strength, still reduced the safety joint simultaneously and broken away from required turning force, more be favorable to salvaging of tubular column to through the setting and the improvement of structure, top connection and lower clutch can convenient to detach and connect, also can adapt to the needs of different direction of rotation.
Description
Technical Field
The utility model relates to an oil gas field development technical field specifically is an oil well tubular column buckle formula safety joint.
Background
The safety joint is a common downhole tool for downhole operation and oil testing completion of oil and gas wells, is generally arranged at the easy-to-clamp part of an operation pipe column or a completion pipe column, and once the pipe column is clamped or buried by sand and cannot be smoothly lifted out of the pipe column, the pipe column is disconnected from the safety joint by lifting the pipe column or positively rotating the pipe column, and after the upper pipe column is lifted out, a special tool is put in to salvage the lower pipe column. At present, the common safety joints for field application mainly comprise a shear type safety joint and a left-hand thread type safety joint.
The left-hand thread type safety joint adopts an upper joint and a lower joint, the upper joint and the lower joint are in threaded connection and are fixed through pins, and the thread direction is opposite to that of an oil pipe on a pipe column and other tools. When the pipe column is stuck by sand or buried by sand in the construction process, the pipe column rotates forwards from the wellhead until the pin is sheared off, and the pipe column continues to rotate to release, so that the upper joint and the lower joint are separated. The limitation of current back-buckling formula safety joint lies in: the upper joint and the lower joint are connected too tightly, the rotating pipe column needs large torque force, and when the pipe column is seriously clamped or buried by sand, the pipe column can be immovable.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of current safety joint, the utility model provides an oil well tubular column buckle formula safety joint has guaranteed high-pressure seal, has improved joint strength, has still reduced the safety joint simultaneously and has broken away from required turning force, more is favorable to salvaging of tubular column.
The technical scheme of the utility model as follows:
the oil well tubular column buckle type safety joint comprises an upper joint, a lower joint, a sealing ring and a soluble pin, wherein the upper joint is provided with a plurality of symmetrical and uniformly distributed clamping blocks, and the lower joint is provided with clamping grooves matched with the clamping blocks; under the stable state of connection, the fixture block is fixed in the draw-in groove, makes top connection and lower clutch link together, places the sealing washer between top connection and the lower clutch, seals up the clearance between top connection and the lower clutch.
Furthermore, the projection of the axial plane of the lower joint clamping groove is L type or inverted T type, when the projection of the clamping groove is inverted T type, the heights of the clamping grooves on the left side and the right side in the horizontal direction are different, so that the upper joint clamping block can only enter one side of the upper joint clamping block.
Furthermore, all be equipped with the cotter groove on top connection and the lower clutch, wherein the cotter groove of lower clutch is the through-hole, the cotter groove of top connection is the counter bore, the through-hole of lower clutch sets up in the position of extending a fixture block width to another vertical edge direction from the perpendicular edge of the card block side of placing of joint draw-in groove, after top connection and lower clutch connection target in place, the cotter groove of top connection and lower clutch is coaxial, puts into soluble pin in inside, further with top connection and lower clutch fixed, soluble pin inserts this moment to with fixture block edge contact, make the fixture block fix along circumference.
Further, the soluble spike is a soluble material.
Furthermore, the edges of the upper joint clamping block and the lower joint clamping groove are provided with guide angles.
The utility model discloses an useful part lies in:
(1) the upper joint and the lower joint are connected in a buckle mode, the rotating angle is extremely small, the rotating force is greatly reduced, the lower joint is easy to fall off, the lower joint can be disconnected only by small rotating force and rotating angle, and the safety joint is more favorable for releasing and breaking.
(2) The clamping groove adopts L and T two kinds of shapes to L type is supporting has two kinds of orientations, can adapt to the needs of different operation condition in the pit better, satisfies the needs of just reversing.
(2) The sealing ring and the bayonet are matched for use, the sealing device has a sealing effect, can bear certain pressure, prevents liquid from seeping from the safety joint, and ensures that the pressure of liquid construction can be ensured, thereby ensuring that fracturing construction or ball throwing and pressing operation is smooth.
(3) The upper joint and the lower joint are connected in a buckle type, so that high-strength connection is guaranteed, and meanwhile, the installation is facilitated.
Drawings
Fig. 1 is a schematic view of a coarse thread safety joint structure provided in the first embodiment and the second embodiment;
fig. 2 is a schematic view of a top connector structure provided in the first embodiment and the second embodiment;
FIG. 3 is a schematic view of FIG. 2 rotated circumferentially 90;
fig. 4 is a schematic view of a lower plug structure according to a first embodiment;
fig. 5 is a schematic view of a lower plug structure provided in the second embodiment;
fig. 6 is a schematic view of a lower plug structure provided in the third embodiment.
Illustration of the drawings:
1 upper joint, 2 lower joint, 3 sealing ring,
101 fixture block, 201 clamping groove and 202 soluble pin.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The first embodiment is as follows:
referring to fig. 1, 2 and 3, the snap-on type safety joint for the oil well string comprises an upper joint 1, a lower joint 2, a sealing ring 3 and a soluble pin 202, wherein 2 clamping blocks 101 are arranged on the upper joint 1, the clamping blocks 101 are rectangular, the lower joint 2 is provided with a clamping groove 201, the clamping groove 201 is L-shaped, the clamping blocks 101 are clamped into the clamping grooves 201 by rotating the upper joint 1, so that the upper joint 1 and the lower joint 2 are connected together, the upper joint 1 and the lower joint 2 are both provided with pin grooves, the pin grooves of the lower joint 2 are through holes, the pin grooves of the upper joint 1 are counter bored, the through holes of the lower joint 2 are arranged at positions extending from the vertical edge of the side, where the clamping blocks 101 are arranged, of the joint clamping grooves 201 to the other vertical edge direction by the width of the clamping blocks 101, after the upper joint 1 and the lower joint 2 are connected in place, the pin grooves of the upper joint 1 and the lower joint 2 are coaxial, the soluble pin 202 is placed inside, so that the upper joint 1 and the lower joint 2 and the soluble pin 202 are further fixed along the edge of the clamping blocks 101, so that the upper joint 1 and the lower joint 2 are not close to the sealing groove 201, and the sealing ring is arranged between the lower joint 201.
This embodiment provides a safety joint, wherein the upper joint 1 and the lower joint 2 are connected by reverse snap-fit, i.e. the direction of snap-fit is opposite to the direction of standard oil pipe thread. The safety joint is arranged at the top of the pipe column, and is unlocked by releasing the hand in the reverse direction when the safety joint is blocked, and the safety joint cannot be unlocked in the forward direction.
Example two:
referring to fig. 1, 4 and 5, the third embodiment has the same structure as the first embodiment, except that the upper joint 1 and the lower joint 2 are connected by reverse snap connection, i.e. the snap direction is the same as the thread direction of the standard oil pipe. The safety joint is installed between each column supporting pipe, supports forward rotation to release the clamp when meeting the resistance in the process of descending the tubular column, and is convenient to salvage by using a reverse-buckling fishing tool in the later period of well repair.
Example three:
referring to fig. 1, 2 and 6, a snap-in type safety joint comprises an upper joint 1, a lower joint 2, a sealing ring 3 and a soluble pin 202. The upper connector 1 is provided with 2 clamping blocks 101, the clamping blocks 101 are rectangular, the lower connector 2 is provided with a clamping groove 201, and the clamping groove 201 is of an inverted T shape; in going into draw-in groove 201 with fixture block 101 card through rotatory top connection 1, make top connection 1 and lower clutch 2 link together, draw-in groove 201 of the type of falling T, the draw-in groove 201 horizontal direction's on both sides about its vertical direction highly different to so that top connection 1 fixture block 101 can only get into one side wherein to this adaptation sets up the fixture block 101 that the position is different, satisfies the fixed and later stage of two kinds of modes of just reversing and uses the demand that specialized tool left hand thread. All be equipped with a plurality of cotter grooves on top connection 1 and the lower clutch 2, wherein the cotter groove of lower clutch 2 is the through-hole, the cotter groove of top connection 1 is the counter bore, the through-hole of lower clutch 2 sets up in the position that the perpendicular edge of placing fixture block 101 side from joint draw-in groove 201 extends a fixture block 101 width to another perpendicular edge direction, after top connection 1 and lower clutch 2 connect in place, the cotter groove of top connection 1 and lower clutch 2 is coaxial, according to fixture block 101 and the actual cooperation direction of draw-in groove 201, put into soluble pin 202 inside, further with top connection 1 and lower clutch 2 fixed, soluble pin 202 inserts this moment, and with fixture block 101 edge contact, make fixture block 101 along circumference fixed, can not free rotation again. A sealing groove is arranged between the upper joint 1 and the lower joint 2 and close to the lower side of the clamping groove 201, and a sealing ring 3 is arranged in the sealing groove to seal a gap between the upper joint 1 and the lower joint 2.
This embodiment provides a safety joint, wherein the upper joint 1 and the lower joint 2 are connected by reverse snap-fit, i.e. the direction of snap-fit is opposite to the direction of standard oil pipe thread. The safety joint is arranged at the top of the pipe column, and is unlocked by releasing the hand in the reverse direction when the safety joint is blocked, and the safety joint cannot be unlocked in the forward direction.
The embodiment of the utility model provides a technical principle of one and two is as follows:
install at least one buckle formula safety joint in operation tubular column or well completion tubular column, sealing washer 3 and buckle have certain sealed effect, can bear certain pressure, have prevented that liquid from the safety joint seepage flow, have guaranteed that liquid construction pressure can get up to ensure that fracturing construction or bowling are suppressed the operation smoothly. The buckle formula safety joint has higher joint strength, the risk that the safety joint breaks off in advance can not appear in the tubular column process of going down. In the process of salvaging the pipe column, if the reverse buckle joint is adopted, the pipe column is reversed from the well mouth to enable the safety joint to be tripped; if a positive snap joint is adopted, the safety joint is tripped by rotating the pipe column positively from the wellhead. After the safety joint is released, the upper joint 2 and the lower joint 2 are separated, and the upper pipe column is smoothly pulled out. Because the rotation angle of buckle formula connection is minimum, can reduce the revolving force by a wide margin, only need less revolving force just can break off, more be favorable to the releasing of safety joint to break off.
Embodiment three, because it combines the advantages of embodiments one and two, it can satisfy both modes of operation.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (5)
1. A snap-on safety joint for an oil well tubular column comprises an upper joint, a lower joint, a sealing ring and a soluble pin; the device is characterized in that the upper joint is provided with a plurality of symmetrical and uniformly distributed clamping blocks, and the lower joint is provided with clamping grooves matched with the clamping blocks; under the stable state of connection, the fixture block is fixed in the draw-in groove, makes top connection and lower clutch link together, places the sealing washer between top connection and the lower clutch, and the sealing washer sets up in the position of draw-in groove downside, seals the clearance between top connection and the lower clutch.
2. The snap-on safety joint of an oil well string as claimed in claim 1, wherein the axial plane projection of the snap groove of the lower joint is L type or inverted T type, and when the projection of the snap groove is inverted T type, the height of the snap groove is different at the left and right sides in the horizontal direction, so that the snap groove of the upper joint can only enter one side.
3. The snap-in safety joint of oil well tubular column according to claim 2, wherein the upper joint and the lower joint are provided with pin grooves, wherein the pin groove of the lower joint is a through hole, the pin groove of the upper joint is a counter bore, the through hole of the lower joint is arranged at a position extending from the vertical edge of the joint clamping groove at the side where the clamping block is arranged to the other vertical edge for one width of the clamping block, when the upper joint and the lower joint are connected in place, the pin grooves of the upper joint and the lower joint are coaxial, a soluble pin is arranged inside, the upper joint and the lower joint are further fixed, and the soluble pin is inserted and contacted with the edge of the clamping block, so that the clamping block is fixed along the circumferential direction.
4. The snap-on safety joint for oil well strings as claimed in claim 3, wherein the soluble pin is a soluble material.
5. The snap-on safety joint of an oil well tubular column according to claim 4, wherein the edges of the upper joint snap-in block and the lower joint snap-in groove are provided with guide angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922282793.1U CN211173983U (en) | 2019-12-18 | 2019-12-18 | Oil well tubular column buckle formula safety joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922282793.1U CN211173983U (en) | 2019-12-18 | 2019-12-18 | Oil well tubular column buckle formula safety joint |
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| Publication Number | Publication Date |
|---|---|
| CN211173983U true CN211173983U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922282793.1U Active CN211173983U (en) | 2019-12-18 | 2019-12-18 | Oil well tubular column buckle formula safety joint |
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| CN (1) | CN211173983U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113879021A (en) * | 2021-10-25 | 2022-01-04 | 义乌工商职业技术学院 | Portable voucher rapid binding device |
-
2019
- 2019-12-18 CN CN201922282793.1U patent/CN211173983U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113879021A (en) * | 2021-10-25 | 2022-01-04 | 义乌工商职业技术学院 | Portable voucher rapid binding device |
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