CN210598852U - Ball head sleeve type flexible short joint for oil well salvage - Google Patents
Ball head sleeve type flexible short joint for oil well salvage Download PDFInfo
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- CN210598852U CN210598852U CN201921435989.3U CN201921435989U CN210598852U CN 210598852 U CN210598852 U CN 210598852U CN 201921435989 U CN201921435989 U CN 201921435989U CN 210598852 U CN210598852 U CN 210598852U
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Abstract
The utility model provides a ball head cover formula oil well is salvaged and is used flexible nipple joint, includes the top connection, goes up to press the cover, go up the bulb, the middle pressure cover, lower bulb, press cover and lower clutch down, wherein: the upper joint is connected with the upper pressing sleeve, the inner side of the end is combined to form a first arc-shaped spherical surface with equal curvature and continuous arc shapes, the lower joint is connected with the lower pressing sleeve, the inner side of the end is combined to form a second arc-shaped spherical surface with equal curvature and continuous arc shapes, an outer convex circular spherical surface on the upper ball head and an outer convex circular spherical surface on the lower ball head are respectively correspondingly matched with the first arc-shaped spherical surface and the first arc-shaped spherical surface, the upper ball head and the lower ball head can swing for a certain angle, the middle pressing sleeve fixedly connects the upper ball head and the lower ball head together to form a ball head sleeve type flexible short section for oil well fishing, and the flexible short section is matched and applied to fishing operation of a large guide shoe oil well fishing tool, so that the problem of blocking of a pitshaft defect area and a side drilling window opening area can be solved.
Description
Technical Field
The utility model relates to an oil well fishing tool, in particular to ball socket formula oil well is salvaged and is used flexible nipple joint.
Background
In the oil field drilling and logging salvage operation, the centering degree of a salvage tool and a down-hole fish (a down-hole pipe column or an instrument) directly influences the oil well salvage effect, particularly, the salvage of the down-hole logging instrument needs to limit the rotation of a drilling tool so as to prevent the logging instrument from being damaged, the down-hole logging instrument cannot enter a guide area of a guide shoe to finish the salvage work, and even can cause salvage accidents. However, in the fishing operation of the horizontal well and the side drilling well, because of the slope pit defect and irregular trend of the well shaft existing in the horizontal well, and the window opening and direction changing area of the side well shaft in the side drilling well, the relative adjusting space between the large-aperture guide shoe and the well shaft is very small and is restricted by the rigid drill rod, the guide shoe is often difficult to adjust in direction by itself, and the guide shoe is very easy to block and block in the area to cause secondary accidents, especially in the fishing operation of the side drilling well, as shown in fig. 1, the guide shoe cannot turn to cause overlarge pressure to be applied to the deflector 20 to cause the deflector 20 to move downwards, so that the fishing tool is difficult to enter the side well shaft, and the subsequent drilling tool is difficult to enter the side well shaft to influence the drilling operation and the oil field production. Therefore, solving the problem of directional guidance of the fishing tool for the large guide shoe oil well is a practical technical problem in the current oil field drilling and logging fishing operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the utility model provides a bulb shell formula oil well is salvaged and is used flexible nipple joint, during big guide shoe oil well fishing tool was applied to in the supporting, the realization was to fishing tool's direction guide, improved fishing efficiency.
The utility model provides a ball head cover formula oil well is salvaged and is used flexible nipple joint, includes: the ball joint comprises an upper joint 1, an upper pressing sleeve 2, an upper ball head 3, a middle pressing sleeve 4, a lower ball head 7, a lower pressing sleeve 5 and a lower joint 8.
The upper part of the upper joint 1 is provided with internal threads for connecting with an oil well drill rod, the lower part of the upper joint is provided with external threads for connecting with the upper pressing sleeve 2, and the inner side of the end head is provided with an upper joint local concave arc spherical surface; the upper part of the upper pressing sleeve 2 is provided with internal threads matched with the external threads at the lower part of the upper joint 1 and connected with each other, the inner side of the lower part is provided with an upper pressing sleeve concave arc spherical surface, and the upper pressing sleeve concave arc spherical surface and the upper joint local concave arc spherical surface are combined to form a first arc spherical surface of an equal-curvature continuous arc; the lower part of the lower joint 8 is provided with an external thread for connecting a fishing tool, the upper part of the lower joint is provided with an external thread for connecting the lower pressing sleeve 5, and the inner side of the end head is provided with a lower joint local concave arc spherical surface; the lower part of the lower pressing sleeve 5 is provided with internal threads matched with the external threads on the upper part of the lower joint 8 and connected with the internal threads, the inner side of the upper part is provided with a concave arc spherical surface in the lower pressing sleeve, and the concave arc spherical surface in the lower pressing sleeve and the local concave arc spherical surface of the lower joint are combined to form a second arc spherical surface of an equal-curvature continuous arc; an upper bulb convex circular spherical surface is arranged at the upper part of the upper bulb 3, is embedded and clamped in the lower inner cavity of the upper pressing sleeve 2 and is correspondingly matched with the first circular arc spherical surface, so that the upper bulb 3 is suspended and connected to the lower part of the upper pressing sleeve 2 and can swing for a certain angle relative to the upper pressing sleeve 2 in the circumferential direction of a horizontal section; a lower ball head convex circular spherical surface is arranged at the lower part of the lower ball head 7, is embedded and clamped in an upper inner cavity of the lower pressing sleeve 5 and is correspondingly matched with the second circular arc spherical surface, so that the lower pressing sleeve 5 is suspended and connected at the lower part of the lower ball head 7 and can swing a certain angle relative to the lower ball head 7 in the circumferential direction of a horizontal section; the middle pressing sleeve 4 is sleeved outside the upper ball head 3 and the lower ball head 7 in a sleeved mode, the lower end of the upper ball head 3 is fixedly connected with the upper end of the lower ball head 7 together in a sleeved mode, and the ball head sleeved flexible short joint for oil well fishing is integrally connected.
Further, an upper limit pin 6a is arranged at the part of the upper joint local concave arc spherical surface on the upper joint 1, an upper joint limit groove 10a is correspondingly formed at the matching position of the upper ball head 3 and the upper joint local concave arc spherical surface, the upper limit pin 6a extends into the upper joint limit groove 10a, and the upper ball head 3 is restrained from rotating relative to the upper joint 1 in the axial direction; meanwhile, a lower limiting pin 6b is arranged at the position of the local concave arc spherical surface of the lower joint on the lower joint 8, a lower joint limiting groove 10b is correspondingly formed in the matched position of the lower ball head 7 and the local concave arc spherical surface of the lower joint, the lower limiting pin 6b extends into the lower joint limiting groove 10b, and the lower joint 8 is restrained from rotating relatively to the axial direction of the lower ball head.
Still further, an upper ball head sealing ring 12a is arranged on the upper ball head convex circular spherical surface on the upper ball head 3, and a lower ball head sealing ring 12b is arranged on the lower ball head convex circular spherical surface on the lower ball head 7, so that the influence on the swinging motion of the upper ball head 3 relative to the upper pressing sleeve 2 and the lower pressing sleeve 5 relative to the lower ball head 7 in the horizontal section circumference radial direction due to the fact that drilling fluid permeates into a fit gap between the upper ball head convex circular spherical surface and the first circular arc-shaped spherical surface or a fit gap between the lower ball head convex circular spherical surface and the second circular arc-shaped spherical surface is prevented or reduced.
A flexible short section for salvaging a multi-section ball head sleeve type oil well comprises an upper joint 1, a lower joint 8, a plurality of middle joints 11 and a plurality of ball head combination units.
The bulb combination unit comprises an upper pressing sleeve 2, an upper bulb 3, a middle pressing sleeve 4, a lower bulb 7 and a lower pressing sleeve 5, wherein: the upper ball head convex circular spherical surface on the upper ball head 3 is embedded and clamped in the lower inner cavity of the upper pressing sleeve 2, the lower ball head convex circular spherical surface on the lower ball head 7 is embedded and clamped in the upper inner cavity of the lower pressing sleeve 5, the middle pressing sleeve 4 is sleeved outside the upper ball head 3 and the lower ball head 7, the lower end of the upper ball head 3 and the upper end of the lower ball head 7 are fixedly connected together, and the upper pressing sleeve 2, the upper ball head 3, the middle pressing sleeve 4, the lower ball head 7 and the lower pressing sleeve 5 are integrally connected; the upper part and the lower part of the middle joint 11 are respectively provided with an external thread used for being connected with the lower pressing sleeve 5 and the upper pressing sleeve 2, the inner sides of the upper end head and the lower end head of the middle joint are respectively provided with a local concave arc spherical surface at the upper part of the middle joint and a local concave arc spherical surface at the lower part of the middle joint, and the local concave arc spherical surface at the upper part of the middle joint and the local concave arc spherical surface at the lower part of the middle joint are respectively combined with the concave arc spherical surface in the lower pressing sleeve and the concave arc spherical surface in the upper; the upper part and the lower part of the middle joint 11 are respectively in threaded connection with the lower pressing sleeve 5 at the lower part and the upper pressing sleeve 2 at the upper part of the ball head combined unit in sequence, a plurality of the ball head combined units are connected into a multi-section flexible chain, the upper part of the multi-section flexible chain is in threaded connection with the upper joint through the upper pressing sleeve 2, and the lower part of the multi-section flexible chain is in threaded connection with the lower joint 8 through the lower pressing sleeve 5, so that the multi-section ball head sleeve type flexible short joint for oil well salvage is formed.
A multi-joint ball-head sleeve type flexible short section for oil well fishing is characterized in that a limit pin 6 is respectively arranged on the upper joint local concave arc spherical surface on the upper joint 1, the lower joint local concave arc spherical surface on the lower joint 8, the intermediate joint upper part local concave arc spherical surface on the intermediate joint 11 and the intermediate joint lower part local concave arc spherical surface, limit grooves 10 are respectively arranged on the convex arc spherical surfaces of the upper ball head 3 and the lower ball head 7 corresponding to the limit pins 6, the limit pins 6 respectively extend into the limit grooves 10 to restrict the axial rotary motion of the upper ball head 3 relative to the upper joint 1 or the intermediate joint 11, the lower joint 8 or the intermediate joint 11 relative to the lower ball head 7.
According to the flexible short joint for fishing the multi-section ball head sleeve type oil well, ball head sealing rings 12 are arranged on the convex circular spherical surfaces on the upper ball head 3 and the lower ball head 7, so that the influence on the swinging motion of the upper ball head 3 relative to the upper pressing sleeve 2 and the lower pressing sleeve 5 relative to the lower ball head 7 on the horizontal section circumference radial direction due to the fact that drilling fluid permeates into fit gaps between the convex circular spherical surfaces and the constant-curvature continuous arc-shaped spherical surfaces is prevented or reduced.
In order to ensure the rigidity of the flexible short section for fishing the multi-section ball head sleeve type oil well, the number of the ball head combination units is preferably 2-3, and the number of the middle joints 11 correspondingly used is preferably 1-2.
The utility model has the advantages that: the utility model provides a bulb shell type flexible nipple joint for oil well salvage, adopt the cooperation structure of evagination circular sphere and indent circular arc sphere, it is perhaps for last pressure sleeve to realize going up the bulb, the relative swing motion of bulb in horizontal section circumference radial down of pressure sleeve, thereby realize bulb shell type flexible nipple joint self for oil well salvage flexible bending, carry out the direction guide to oil well fishing tool, and the fishing tool has simple structure, high durability and convenient use, and is with low costs, characteristics such as workable, it is applied to in big guide shoe oil well fishing tool's the salvage operation to form a complete set, can solve well casing defect region in the horizontal well and open window turning regional block the card problem in the side drilling, the guide angle can reach 30 at utmost, guarantee fishing tool's smooth down, improve the salvage effect and the salvage efficiency of oil well fish.
Drawings
FIG. 1 is a schematic diagram of a side-drilling inclined shaft middle side open-window shaft.
FIG. 2 is a single DR-Q-5 type flexible short joint assembly structure diagram for fishing a ball head sleeve type oil well.
Fig. 3 and 2 are sectional views taken along line a-a.
Fig. 4 and a cross-sectional view of B-B in fig. 2.
FIG. 5 is a two-section DR-Q-5 type flexible short section assembly structure diagram for fishing the ball head sleeve type oil well.
Detailed Description
The technical solution claimed in the present invention will be further described with reference to the following embodiments and accompanying drawings, and the method for assembling the flexible short joint for use in a ball joint sleeve type oil well salvage.
Example 1
A single-joint DR-Q-5 type ball head sleeve type flexible short section for oil well fishing is shown in figure 2 and comprises an upper joint 1, an upper pressing sleeve 2, an upper ball head 3, a middle pressing sleeve 4, a lower ball head 7, a lower pressing sleeve 5, a lower joint 8 and a split thread sleeve 9.
The lower part of the upper joint 1 is provided with external threads, the inner side of the end head is provided with an upper joint local concave arc spherical surface, the upper part of the upper pressing sleeve 2 is in threaded connection with the lower part of the upper joint 1, the inner side of the lower part is provided with an upper pressing sleeve concave arc spherical surface, and the upper pressing sleeve concave arc spherical surface and the upper joint local concave arc spherical surface are combined to form a first arc spherical surface of an equal-curvature continuous arc; the upper part of the lower joint 8 is provided with an external thread, the inner side of the end head is provided with a lower joint local concave arc spherical surface, the lower part of the lower pressing sleeve 5 is in threaded connection with the upper part of the lower joint 8, the inner side of the upper part is provided with a lower pressing sleeve concave arc spherical surface, and the lower pressing sleeve concave arc spherical surface and the lower joint local concave arc spherical surface are combined to form a second arc spherical surface which is in an equal-curvature continuous arc shape; the upper bulb convex circular spherical surface at the upper part of the upper bulb 3 is embedded and clamped in the lower inner cavity of the upper pressing sleeve 2, so that the upper bulb 3 is suspended and connected at the lower part of the upper pressing sleeve 2 and is correspondingly matched with the first circular arc spherical surface, the upper bulb 3 is suspended and connected at the lower part of the upper pressing sleeve 2, and can swing a certain angle relative to the upper pressing sleeve 2 in the circumferential radial direction of a horizontal section; the lower ball head convex circular spherical surface at the lower part of the lower ball head 7 is embedded and clamped in the inner cavity at the upper part of the lower pressing sleeve 5 and forms corresponding fit with the second circular arc spherical surface, so that the lower pressing sleeve 5 is suspended and connected at the lower part of the lower ball head 7 and can swing a certain angle relative to the lower ball head 7 in the circumferential radial direction of a horizontal section; go up bulb 3's lower part has the external screw thread, lower bulb 7's upper portion seted up with run from opposite directions the swivel nut ring channel of swivel nut 9 matched with, run from opposite directions swivel nut 9 has the external screw thread, and the section is L shape, has abduction round platform plane, and is fixed to be inlayed in the swivel nut ring channel, middle pressure sleeve 4 upper portion and lower part are respectively had the internal thread, upper portion with go up bulb 3 threaded connection, the lower part with run from opposite directions swivel nut 9 threaded connection, will go up bulb 3 with bulb 7 fixed connection down, run from opposite directions on the swivel nut 9 abduction round platform plane supports the bottom of middle pressure sleeve 4, the decomposition has reduced middle pressure sleeve 4 with go up the gravity that bears on the threaded connection face between bulb 3 and the lower bulb 7, improved go up bulb 3 with stability and reliability of connecting between the bulb 7 down.
Meanwhile, an upper limit pin 6a is arranged on the upper joint 1, an upper joint limit groove 10a is correspondingly formed in the upper ball head 3, as shown in fig. 3, 2 upper limit pins 6a and 2 upper joint limit grooves 10a are correspondingly formed in the upper joint 6a and the upper joint limit groove 10a, and the upper limit pins 6a and the upper joint limit grooves 10a are matched with each other to restrain the axial rotation motion of the upper ball head 3 relative to the upper joint 1; meanwhile, a lower limiting pin 6b is arranged on the lower joint 8, a lower joint limiting groove 10b is correspondingly formed in the lower ball head 8, 2 lower limiting pins 6b and 2 lower joint limiting grooves 10b are correspondingly formed in the lower joint 6b and the lower joint limiting grooves 10b respectively, and the lower limiting pins 6b and the lower joint limiting grooves 10b are matched with each other to restrain the axial rotation motion of the lower joint 8 relative to the lower ball head 7; an upper ball head sealing ring 11a is arranged on the upper ball head convex circular spherical surface on the upper ball head 3, and a lower ball head sealing ring 12b is arranged on the lower ball head convex circular spherical surface on the lower ball head 7.
The assembling method of the flexible short joint for fishing the single-joint DR-Q-5 type ball head sleeve type oil well comprises the following steps:
1. after an upper ball head sealing ring 11a is sleeved on the outer convex circular spherical surface of the upper ball head 3, the upper ball head 3 is placed in the central cavity of the upper pressing sleeve 2 from the upper part of the upper pressing sleeve 2, so that an external thread screw arranged at the lower part of the upper ball head 3 extends out from the lower end of the upper pressing sleeve 2, and the outer convex circular spherical surface of the upper ball head at the lower part of the upper ball head 7 is embedded and clamped in the inner cavity of the lower part of the upper pressing sleeve 2 and is matched with the inner concave circular spherical surface of the upper pressing sleeve arranged at the inner side of the lower part of the upper pressing sleeve 2.
2. After the lower ball head sealing ring 11b is sleeved on the lower ball head convex circular spherical surface of the lower ball head 7, the lower ball head 7 is placed in the central cavity of the lower pressing sleeve 5 from the lower part of the lower pressing sleeve 5, so that a thread sleeve annular groove formed in the upper part of the lower ball head 7 extends out from the upper end of the lower pressing sleeve 5, and the lower ball head convex circular spherical surface of the lower part of the lower ball head 7 is embedded and clamped in the upper inner cavity of the lower pressing sleeve 5 and is matched with a lower pressing sleeve concave circular arc spherical surface arranged on the inner side of the upper part of the lower pressing sleeve 5.
3. The split thread insert 9 is fixedly combined and embedded in a thread insert annular groove formed in the lower ball head 7, an internal thread on the upper portion of the middle pressing sleeve 4 is connected with an external thread on the lower portion of the upper ball head 3 in a matched mode, and an internal thread on the lower portion is connected with an external thread on the split thread insert 9 in a matched mode, so that the upper ball head 3 is fixedly connected with the lower ball head 7.
4. After an upper limit pin 6a is embedded into an upper joint local concave arc spherical surface arranged on the inner side of the lower end head of the upper joint 1, the external thread on the lower part of the upper joint 1 is matched and connected with the internal thread on the upper part of the upper pressure sleeve 2, and the connection between the upper joint 1 and the upper pressure sleeve 2 is locked and positioned by screwing a fixing screw 12.
5. After inserting the lower limit pin 6b on the local concave circular arc sphere of lower clutch that the inboard lower clutch 8 upper portion end set up, will the external screw thread on lower clutch 8 upper portion with press the interior screw-thread fit connection of cover 5 lower part down, it is right to screw set screw 13 the lower clutch 8 with press the connection between the cover 5 to lock the location down.
Example 2
A double-joint DR-Q-5 type ball head sleeve type flexible short joint for fishing a well is shown in figure 5 and comprises an upper joint 1, a lower joint 8, an intermediate joint 11 and 2 ball head combination units.
The bulb combination unit comprises an upper pressing sleeve 2, an upper bulb 3, a middle pressing sleeve 4, a lower bulb 7, a lower pressing sleeve 5 and a split thread sleeve 9, wherein: the upper ball head convex circular spherical surface on the upper ball head 3 is embedded and clamped in the lower inner cavity of the upper pressing sleeve 2, the lower ball head convex circular spherical surface on the lower ball head 7 is embedded and clamped in the upper inner cavity of the lower pressing sleeve 5, the lower part of the upper ball head 3 is provided with an external thread, the upper part of the lower ball head 7 is provided with a thread sleeve annular groove matched with the split thread sleeve 9, the split thread sleeve 9 is provided with an external thread and is fixedly embedded in the thread sleeve annular groove, the upper part and the lower part of the middle pressing sleeve 4 are respectively provided with an internal thread, the upper part is in threaded connection with the upper ball head 3, the lower part is in threaded connection with the split thread sleeve 9, the upper ball head 3 is fixedly connected with the lower ball head 7, and the upper pressing sleeve 2, the upper ball head 3, the middle pressing sleeve 4, the lower ball head 7 and the lower pressing sleeve 5 are integrally connected.
The upper part and the lower part of the middle joint 11 are respectively provided with an external thread which is used for being matched with the lower pressing sleeve 5 and the upper pressing sleeve 2, the inner sides of the end heads at two ends are respectively provided with a local concave arc spherical surface of the middle joint, the upper part of the middle joint 11 is fixedly connected with the lower pressing sleeve 5 at the lower part of the ball head combined unit through a thread, the lower part of the middle joint is fixedly connected with the other upper pressing sleeve 2 at the upper part of the ball head combined unit through a thread, 2 ball head combined units are connected into a double-joint flexible ball head chain, the upper part of the double-joint flexible ball head chain is connected with the upper joint through the upper pressing sleeve 2, and the lower part of the double-joint flexible ball head chain is connected with the lower joint 8 through.
Meanwhile, the double-joint DR-Q-5 type ball-end sleeve type flexible short joint for oil well salvage is characterized in that a limiting pin 6 is respectively arranged on the upper joint local concave arc spherical surface on the upper joint 1, the lower joint local concave arc spherical surface on the lower joint 8 and the inner side of the end head at two ends of the middle joint 11 on the local concave arc spherical surface of the middle joint respectively, limiting grooves 10 are respectively arranged on the convex circular spherical surfaces of the upper ball head 3 and the lower ball head 7 at the positions corresponding to the limiting pins 6, the limiting pins 6 respectively extend into the corresponding limiting grooves 10, and the axial rotation motion of each upper ball head 3 relative to the upper joint 1 or the middle joint 11, the lower joint 8 or the middle joint 11 relative to the lower ball head 7 is restrained; ball head sealing rings 12 are respectively arranged on the convex circular spherical surfaces of the upper ball head 3 and the lower ball head 7.
Claims (9)
1. The utility model provides a ball socket formula oil well is salvaged and is used flexible nipple joint which characterized in that includes: the device comprises an upper joint (1), an upper pressing sleeve (2), an upper ball head (3), a middle pressing sleeve (4), a lower ball head (7), a lower pressing sleeve (5) and a lower joint (8);
the upper part of the upper joint (1) is provided with internal threads, the lower part of the upper joint is provided with external threads, and the inner side of the end head is provided with an upper joint local concave arc spherical surface; the upper part of the upper pressing sleeve (2) is provided with internal threads matched with the external threads at the lower part of the upper joint (1) and connected with each other, the inner side of the lower part is provided with an upper pressing sleeve concave arc spherical surface, and the upper pressing sleeve concave arc spherical surface and the upper joint local concave arc spherical surface are combined to form a first arc spherical surface in an equal-curvature continuous arc shape; the lower part of the lower joint (8) is provided with an external thread, the upper part of the lower joint is provided with an external thread, and the inner side of the end head is provided with a lower joint local concave arc spherical surface; the lower part of the lower pressing sleeve (5) is provided with internal threads matched with the external threads on the upper part of the lower joint (8) and connected with the internal threads, the inner side of the upper part is provided with a concave arc spherical surface in the lower pressing sleeve, and the concave arc spherical surface in the lower pressing sleeve and the local concave arc spherical surface of the lower joint are combined to form a second arc spherical surface which is in an equal-curvature continuous arc shape; an upper ball head convex circular spherical surface is arranged at the upper part of the upper ball head (3), is embedded and clamped in the lower inner cavity of the upper pressing sleeve (2) and is correspondingly matched with the first circular arc spherical surface, so that the upper ball head (3) is suspended and connected to the lower part of the upper pressing sleeve (2), and can swing for a certain angle relative to the upper pressing sleeve (2) in the circumferential radial direction of a horizontal section; a lower ball head convex circular spherical surface is arranged at the lower part of the lower ball head (7), is embedded and clamped in an upper inner cavity of the lower pressing sleeve (5) and is correspondingly matched with the second circular arc spherical surface, so that the lower pressing sleeve (5) is suspended and connected at the lower part of the lower ball head (7) and can swing for a certain angle relative to the lower ball head (7) in the circumferential radial direction of a horizontal section; the middle pressing sleeve (4) is sleeved outside the upper ball head (3) and the lower ball head (7) in a sleeved mode, and the lower end of the upper ball head (3) is fixedly connected with the upper end of the lower ball head (7).
2. The ball-socket flexible sub for oil well salvage according to claim 1, characterized in that: an upper limiting pin (6 a) is arranged at the part of the upper joint local concave arc spherical surface on the upper joint (1), an upper joint limiting groove (10 a) is correspondingly formed in the matching position of the upper ball head (3) and the upper joint local concave arc spherical surface, and the upper limiting pin (6 a) extends into the upper joint limiting groove (10 a); and simultaneously, on lower clutch (8), lower clutch part concave circular arc sphere position department is provided with down spacing round pin (6 b) lower bulb (7) with correspond on the lower clutch part concave circular arc sphere position of mutually supporting and open and establish lower clutch spacing groove (10 b), lower spacing round pin (6 b) extend into in lower clutch spacing groove (10 b).
3. The ball-socket flexible sub for oil well salvage according to claim 2, characterized in that: an upper ball head sealing ring (12 a) is arranged on the upper ball head convex circular spherical surface on the upper ball head (3), and a lower ball head sealing ring (12 b) is arranged on the lower ball head (7) convex circular spherical surface on the lower ball head.
4. The ball-joint type flexible sub for oil well fishing according to any one of claims 1 to 3, characterized in that: also comprises a split thread sleeve (9);
go up the lower part of bulb (3) and have the external screw thread, the upper portion of bulb (7) down seted up with run from opposite directions swivel nut (9) matched with swivel nut ring channel, run from opposite directions swivel nut (9) and have the external screw thread, the cross-section is L shape, has abduction round platform plane, and is fixed to inlay in the swivel nut ring channel, middle pressure cover (4) upper portion and lower part do not have the internal thread, upper portion with go up bulb (3) threaded connection, the lower part with run from opposite directions swivel nut (9) threaded connection, will go up bulb (3) with bulb (7) fixed connection down gets up.
5. The utility model provides a flexible nipple joint is used in salvage of multisection bulb cover formula oil well, includes, top connection (1), lower clutch (8), its characterized in that: the ball joint structure also comprises a plurality of intermediate joints (11) and a plurality of ball head combination units;
bulb modular unit is including last pressure cover (2), last bulb (3), middle pressure cover (4), bulb (7) and lower pressure cover (5), wherein: the upper ball head convex circular spherical surface on the upper ball head (3) is embedded and clamped in the lower inner cavity of the upper pressing sleeve (2), the lower ball head convex circular spherical surface on the lower ball head (7) is embedded and clamped in the upper inner cavity of the lower pressing sleeve (5), the middle pressing sleeve (4) is sleeved outside the upper ball head (3) and the lower ball head (7), the lower end of the upper ball head (3) is fixedly connected with the upper end of the lower ball head (7), and the upper pressing sleeve (2), the upper ball head (3), the middle pressing sleeve (4), the lower ball head (7) and the lower pressing sleeve (5) are integrally connected; the upper part and the lower part of the middle joint (11) are respectively provided with an external thread used for being connected with the lower pressing sleeve (5) and the upper pressing sleeve (2), the inner sides of the upper end and the lower end are respectively provided with a local concave arc spherical surface at the upper part of the middle joint and a local concave arc spherical surface at the lower part of the middle joint, and the local concave arc spherical surface at the upper part of the middle joint and the local concave arc spherical surface at the lower part of the middle joint are respectively combined with the concave arc spherical surface in the lower pressing sleeve and the concave arc spherical surface in; the upper parts and the lower parts of the corresponding number of the middle joints (11) are respectively in threaded connection with the lower pressing sleeve (5) at the lower part and the upper pressing sleeve (2) at the upper part of the ball head combination unit in sequence, a plurality of numbers of the ball head combination units are connected into a multi-section flexible chain, the upper parts of the multi-section flexible chain are in threaded connection with the upper joints through the upper pressing sleeves (2), and the lower parts of the multi-section flexible chain are connected with the lower joints (8) through the lower pressing sleeves (5).
6. The flexible short joint for fishing the multi-joint ball-end sleeve type oil well as defined in claim 5, characterized in that: the ball head combination unit also comprises a split thread sleeve (9);
the upper ball head convex circular spherical surface on the upper ball head (3) is embedded and clamped in a lower inner cavity of the upper pressing sleeve (2), the lower ball head convex circular spherical surface on the lower ball head (7) is embedded and clamped in an upper inner cavity of the lower pressing sleeve (5), the lower part of the upper ball head (3) is provided with external threads, the upper part of the lower ball head (7) is provided with a thread sleeve annular groove matched with the split thread sleeve (9), the split thread sleeve (9) is provided with external threads and fixedly embedded in the thread sleeve annular groove, the upper part and the lower part of the middle pressing sleeve (4) are respectively provided with internal threads, the upper part is in threaded connection with the upper ball head (3), the lower part is in threaded connection with the split thread sleeve (9), and the upper ball head (3) is fixedly connected with the lower ball head (7).
7. The flexible short joint for fishing the multi-joint ball-end sleeve type oil well as defined in claim 6, characterized in that: the upper joint is characterized in that the upper joint (1) is provided with an upper joint local concave arc spherical surface, the lower joint (8) is provided with a lower joint local concave arc spherical surface, the intermediate joint (11) is provided with an intermediate joint upper part local concave arc spherical surface and an intermediate joint lower part local concave arc spherical surface, limiting pins (6) are respectively arranged on the convex arc spherical surfaces of the upper ball head (3) and the lower ball head (7) and corresponding positions of the limiting pins (6) are respectively provided with limiting grooves (10), and the limiting pins (6) respectively extend into the limiting grooves (10).
8. The flexible short joint for fishing the multi-joint ball-end sleeve type oil well as defined in claim 7, characterized in that: ball head sealing rings (12) are arranged on the convex circular spherical surfaces of the upper ball heads (3) and the lower ball heads (7).
9. The flexible sub for oil well fishing of a multi-joint ball head sleeve type according to any one of claims 5 to 8, characterized in that: the number of the ball head combination units is 2-3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921435989.3U CN210598852U (en) | 2019-09-03 | 2019-09-03 | Ball head sleeve type flexible short joint for oil well salvage |
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| CN201921435989.3U CN210598852U (en) | 2019-09-03 | 2019-09-03 | Ball head sleeve type flexible short joint for oil well salvage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112932641A (en) * | 2021-01-25 | 2021-06-11 | 河北医科大学第三医院 | Tibia intramedullary nail |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112932641A (en) * | 2021-01-25 | 2021-06-11 | 河北医科大学第三医院 | Tibia intramedullary nail |
| CN112932641B (en) * | 2021-01-25 | 2023-09-08 | 河北医科大学第三医院 | Tibia intramedullary nail |
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