CN213510477U - Safety joint for sand prevention - Google Patents
Safety joint for sand prevention Download PDFInfo
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- CN213510477U CN213510477U CN202022195825.7U CN202022195825U CN213510477U CN 213510477 U CN213510477 U CN 213510477U CN 202022195825 U CN202022195825 U CN 202022195825U CN 213510477 U CN213510477 U CN 213510477U
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Abstract
The utility model discloses a safety joint for sand control, including top connection, lower clutch, the lower clutch upper end is connected with top connection lower extreme screw thread formula, still includes: the sealing sleeve is arranged in the upper joint, the sealing sleeve and the upper joint form a mutual axial sliding type sealing pair, and the outer wall of the sealing sleeve is provided with an embedding groove; the anti-impact mechanism is arranged in an embedded groove formed in the outer wall of the sealing sleeve; the inner end of the shear pin is fixedly connected with the impact-resistant mechanism, the outer end of the shear pin is fixedly connected with the upper joint, the upper joint is provided with a radially-communicated sand outlet, and the sealing sleeve can seal the sand outlet. The utility model discloses a design elastic cushion in safety joint, realized going into the in-process under the tubular column, the shear pin can not cut in advance, through the design loose sand hole, can be through washing the not hard up grit around of well after realizing that the sand buries, and then realizes safety joint's disconnection to whole salvage success rate that has promoted the sand screen.
Description
Technical Field
The utility model belongs to the technical field of oil-water well sand screen sand control technique and specifically relates to a safety joint for sand control.
Background
When oil-water well sand screen sand control, the safety joint interval distribution is between the sand screen, and when later stage sand control became invalid, the sand screen was because the sand buries when unable whole salvage in the pit, can follow the safety joint and go out the disconnection to realize the segmentation and salvage. The current commonly used safety joint mainly comprises an upper joint, a shearing pin, a lower joint and the like. The safety joint has two problems, namely, a shearing pin is extremely easy to shear due to vibration or liquid flow excitation of a pipe column in the process of descending the well, and the pipe column is disconnected from the shearing pin, so that construction accidents are caused; and secondly, when the sand burying at the safety joint is serious, the sand around the safety joint is loosened because the safety joint cannot be washed, and the safety joint cannot be disconnected.
Publication (bulletin) No.: CN210134891U, publication (public notice) day: 2020-03-10 discloses a safety joint for a sand control screen and the sand control screen. The safety joint for the sand control screen pipe comprises an upper joint, a lower joint, a salvaging ring and a positioning block, wherein the upper joint, the lower joint and the salvaging ring are all of a cylindrical structure, the upper part of the lower joint is sleeved outside the upper joint, the upper part of the salvaging ring is positioned inside the upper joint, the lower part of the salvaging ring extends into the lower joint, the salvaging ring is connected with the upper joint through a breakable connecting piece, the inner wall of the lower joint is provided with a clamping groove, the positioning block is clamped between the inner wall of the clamping groove and the outer wall of the salvaging ring, and the outer wall of the salvaging ring below the positioning block is provided with a; when the fishing ring is lifted, the connecting piece is disconnected, the containing groove moves upwards, the positioning block falls into the containing groove, and the upper joint is separated from the lower joint. The utility model provides a safe festival on the sand control screen pipe connect poor stability, the easy disconnection drop, the low technical problem of security.
Publication (bulletin) No.: CN201347744Y, publication (public notice) day: 2009-11-18A sliding sleeve type well washing device comprises an upper joint, a piston, a cylinder sleeve, a spring, a central pipe, a support ring, a baffle ring, a safety joint and a lower joint. The piston is connected with the central tube, the piston is installed in the upper joint, the lower part of the upper joint outside the central tube is sequentially connected with the cylinder sleeve and the lower joint, the spring is installed between the central tube and the cylinder sleeve below the piston, and the supporting ring, the baffle ring and the safety joint are sequentially installed between the central tube and the lower joint below the cylinder sleeve. The utility model has the structural characteristics of well-flushing is washed to the sliding sleeve, extensively uses in the oil recovery technology of oil recovery well.
Publication (bulletin) No.: CN201671561U, publication (public notice) day: 2010-12-15 a well-flushing safety joint, including top connection (1), endotheca (2), lower clutch (8), be equipped with pin (3) between endotheca (2) and top connection (1), be equipped with scissors nail (4) between endotheca (1) and lower clutch (8), top connection (1) is opened has water conservancy diversion hole (5), installs in the interior sliding sleeve (6) that have the toper ball seat, installs pin (7) between inner sliding sleeve (6) and top connection (1). The utility model discloses a division guiding hole at the top connection, install the inner sliding sleeve that is equipped with the toper ball seat additional in it, the erection pin between top connection and inner sliding sleeve, bury the tubular column when the card when the safety joint sand, sit the dress on the toper ball seat of inner sliding sleeve upper end with the ball from the well head income, oil pipe is suppressed and is made the pin cut off, inner sliding sleeve downstream under the pressure, the guiding hole exposes and switches on with oil jacket annular space, even safety joint department sand buries also can realize the well washing, the problem that safety joint department sand buried not the well washing has been solved.
Publication (bulletin) No.: CN200975222Y, publication (public notice) day: 2007-11-14 discloses a downhole string buffer safety processor used in the petroleum industry, which is used in a downhole sand control string. The underground pipe column buffering safety processor comprises an upper joint, a shearing pin and a lower joint, wherein an impact prevention mechanism is installed in the upper joint and the lower joint, the lower joint is connected with the impact prevention mechanism, and the shearing pin is inserted between the upper joint and the impact prevention mechanism. Use in sand control tubular column in the pit the utility model discloses can prevent that the tremor of tubular column from breaking off at the in-process of going into the well, go down the shaft bottom with the tubular column safely. When the pipe column needs post-processing and is not pulled out, the shearing pin can be conveniently pulled off, the upper pipe column is lifted out of the ground, the construction success rate is improved, the construction safety is ensured, and the production cost is reduced.
Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, perhaps technical field or application scenario are different, are directed to the utility model discloses more technical problem and the beneficial effect that will solve, above open technical document all do not have the technological inspiration.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a safety joint for sand control to the above-mentioned defect that prior art exists, through design elastic buffer pad in the safety joint, realized going into the in-process under the tubular column, the shear pin can not cut in advance, through designing the sand loosening hole, can be not hard up grit around through the well washing after realizing that sand buries, and then realizes the disconnection that safety joint to whole salvage success rate that has promoted the sand screen.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a safety joint for sand control, includes top connection, lower clutch, the lower clutch upper end is connected with top connection lower extreme screw thread formula, still includes:
the sealing sleeve is arranged in the upper joint, the sealing sleeve and the upper joint form a mutual axial sliding type sealing pair, and the outer wall of the sealing sleeve is provided with an embedding groove;
the anti-impact mechanism is arranged in an embedded groove formed in the outer wall of the sealing sleeve;
the inner end of the shear pin is fixedly connected with the impact-resistant mechanism, the outer end of the shear pin is fixedly connected with the upper joint, the upper joint is provided with a radially-communicated sand outlet, and the sealing sleeve can seal the sand outlet.
Further, the impact-proof mechanism is an elastic cushion pad.
Furthermore, the inner end of the shear pin is sleeved in the central hole of the elastic buffer pad in a penetrating manner.
Furthermore, the outer end of the shear pin is provided with an external thread, and the shear pin is connected with a shear pin threaded hole formed in the upper joint in a threaded manner.
Furthermore, the inner wall of the upper joint is provided with an upper limiting shoulder which is positioned above the sealing sleeve, and the inner diameter of the upper limiting shoulder is smaller than the outer diameter of the sealing sleeve.
Furthermore, a blocking sleeve is further installed on the inner wall of the upper joint and serves as a lower limiting shoulder, the blocking sleeve is located below the sealing sleeve, and the inner diameter of the blocking sleeve is smaller than the outer diameter of the sealing sleeve.
Further, the axial distance between the blocking sleeve and the lowermost sand outlet is larger than or equal to the axial length of the sealing sleeve.
Compared with the prior art, the utility model following beneficial effect has:
the utility model discloses a design elastic cushion in safety joint, realized going into the in-process under the tubular column, the shear pin can not cut in advance, through design loose sand hole, can be through washing the not hard up grit around of well after realizing that the sand buries, and then realizes safety joint's disconnection to the success rate of salvaging of sand screen pipe has wholly been promoted, and application prospect is wide.
Drawings
Fig. 1 is the utility model relates to a safety joint's for sand control structure schematic diagram.
In the figure: 1-upper joint; 2-sealing the sleeve; 3-a resilient cushion; 4-cutting nails; 5-lower joint; 6-blocking sleeve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
referring to fig. 1, the present invention provides a technical solution:
the utility model provides a safety joint for sand control, includes top connection 1, lower clutch 5, the lower clutch upper end is connected with top connection lower extreme screw thread formula, still includes:
the sealing sleeve 2 is arranged in the upper joint, the sealing sleeve and the upper joint form a mutual axial sliding type sealing pair, and the outer wall of the sealing sleeve is provided with an embedding groove;
the anti-impact mechanism is arranged in an embedded groove formed in the outer wall of the sealing sleeve;
shear pin 4, shear pin inner is connected fixedly with protecting against shock mechanism, and shear pin outer end is connected fixedly with the top connection, and the top connection sets up the sand outlet that radially link up, sealing sleeve can block up the sand outlet.
Further, the impact prevention mechanism is an elastic cushion pad 3. Other similar resilient members, such as springs, etc., are of course possible. Are all in the protection scope of the utility model.
Furthermore, the inner end of the shear pin is sleeved in the central hole of the elastic buffer pad in a penetrating manner.
Furthermore, the outer end of the shear pin is provided with an external thread, and the shear pin is connected with a shear pin threaded hole formed in the upper joint in a threaded manner.
Furthermore, the inner wall of the upper joint is provided with an upper limiting shoulder which is positioned above the sealing sleeve, and the inner diameter of the upper limiting shoulder is smaller than the outer diameter of the sealing sleeve.
Furthermore, a blocking sleeve 6 is further installed on the inner wall of the upper joint, the blocking sleeve serves as a lower limiting shoulder and is located below the sealing sleeve, and the inner diameter of the blocking sleeve is smaller than the outer diameter of the sealing sleeve.
Further, the axial distance between the blocking sleeve and the lowermost sand outlet is larger than or equal to the axial length of the sealing sleeve.
The upper joint 1 is connected with the upper sand screen pipe through threads, the lower joint 5 is connected with the lower sand screen pipe through threads, and the blocking sleeve 6 is connected with the upper joint 1 through threads. The upper joint 1 is provided with a sand loosening hole which is sealed by the sealing sleeve 2. The sealing sleeve is fixedly connected with the upper joint through the shear pin 4, the elastic buffer pads 3 are arranged above and below the sealing sleeve, and the elastic buffer pads 3 are distributed above and below the shear pin 4 and play a role in shearing and buffering the shear pin 4. The upper joint 1 and the lower joint 5 are in reverse threaded connection, and when the sand filter pipe is fished, the sand filter pipe is reversely rotated and buckled, so that the safety joint is disconnected.
During sand prevention, the safety joints are distributed among the sand filtering pipes at intervals and are put into a well along with the sand filtering pipes. In the process of running in, even if the pipe column vibrates or liquid flow is excited by a large margin, the shear pins 4 are provided with the elastic buffer pads up and down, so that the shear pins can be prevented from being cut in advance, and the sand prevention pipe column can be ensured to safely run into the well. When later sand control is invalid and the sand filter pipe is seriously buried by sand and can not be integrally salvaged, the steel ball is thrown into the well, falls on the sealing sleeve 2, the shear pin 4 is sheared by the striking pressure, the sealing sleeve 2 falls on the baffle sleeve 6, the sand loosening hole is exposed, and the well washing and sand loosening are carried out. And after sand loosening is finished, the forward rotating pipe column is used for inverting the safety joint to lift the upper sand filtering pipe. Then the lower sand filtering pipes are fished in sequence.
The utility model discloses a safety joint for sand control through design elastic buffer pad in safety joint, has realized going into the in-process under the tubular column, and the shear pin can not cut in advance, through design loose sand hole, can be through washing the not hard up grit around of well after realizing that the sand buries, and then realizes the disconnection of safety joint to whole salvage success rate that has promoted the sand screen pipe, application prospect is wide.
The main implementation method of the safety joint for sand control comprises the following steps:
(1) firstly, connecting an upper joint 1 with a sand filter pipe, connecting a lower joint 5 with the sand filter pipe, determining the number of safety joints and the distribution among the sand filter pipes according to well conditions, and lowering the sand filter pipes to the underground along a casing pipe through a wellhead power device;
(2) when the sand control failure is salvaged in the later period, firstly, steel balls are put into the well, after the steel balls fall into the sealing sleeve, the steel balls are pressed to cut off the shear pins 4, the sealing sleeve 2 falls on the baffle sleeve 6, and the sand loosening holes are exposed;
(3) a special fishing tool is put in, butt joint and anchoring are carried out on the special fishing tool and the sand filtering pipe, liquid is pumped into the well through a pump truck on the ground, and sand around the safety joint is washed and loosened;
(4) the pipe column is rotated forward to realize the disconnection of the safety joint, so that the salvaging of the sand filtering pipe at the upper part is realized;
(5) and sequentially fishing the sand filtering pipes at the lower part.
Example 2:
referring to fig. 1, the present invention provides a technical solution:
the utility model provides a safety joint for sand control, includes top connection 1, lower clutch 5, the lower clutch upper end is connected with top connection lower extreme screw thread formula, still includes:
the sealing sleeve 2 is arranged in the upper joint, the sealing sleeve and the upper joint form a mutual axial sliding type sealing pair, and the outer wall of the sealing sleeve is provided with an embedding groove;
the anti-impact mechanism is arranged in an embedded groove formed in the outer wall of the sealing sleeve;
shear pin 4, shear pin inner is connected fixedly with protecting against shock mechanism, and shear pin outer end is connected fixedly with the top connection, and the top connection sets up the sand outlet that radially link up, sealing sleeve can block up the sand outlet.
Further, the impact prevention mechanism is an elastic cushion pad 3.
Furthermore, the inner end of the shear pin is sleeved in the central hole of the elastic buffer pad in a penetrating manner.
Furthermore, the outer end of the shear pin is provided with an external thread, and the shear pin is connected with a shear pin threaded hole formed in the upper joint in a threaded manner.
Example 3:
referring to fig. 1, the present invention provides a technical solution:
the utility model provides a safety joint for sand control, includes top connection 1, lower clutch 5, the lower clutch upper end is connected with top connection lower extreme screw thread formula, still includes:
the sealing sleeve 2 is arranged in the upper joint, the sealing sleeve and the upper joint form a mutual axial sliding type sealing pair, and the outer wall of the sealing sleeve is provided with an embedding groove;
the anti-impact mechanism is arranged in an embedded groove formed in the outer wall of the sealing sleeve;
shear pin 4, shear pin inner is connected fixedly with protecting against shock mechanism, and shear pin outer end is connected fixedly with the top connection, and the top connection sets up the sand outlet that radially link up, sealing sleeve can block up the sand outlet.
Although fig. 1 is used for all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as the parts or structural features missing in the embodiments are removed from the drawing. As will be clear to the skilled person. Of course, the embodiments with more components are only the preferred embodiments, and the embodiments with fewer components are the basic embodiments, but the basic utility model objects can also be achieved, so all these are within the protection scope of the present invention.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a safety joint for sand control, includes top connection, lower clutch, the lower clutch upper end is connected with top connection lower extreme screw thread formula, its characterized in that still includes:
the sealing sleeve is arranged in the upper joint, the sealing sleeve and the upper joint form a mutual axial sliding type sealing pair, and the outer wall of the sealing sleeve is provided with an embedding groove;
the anti-impact mechanism is arranged in an embedded groove formed in the outer wall of the sealing sleeve;
the inner end of the shear pin is fixedly connected with the impact-resistant mechanism, the outer end of the shear pin is fixedly connected with the upper joint, the upper joint is provided with a radially-communicated sand outlet, and the sealing sleeve can seal the sand outlet.
2. The sand control safety joint of claim 1, wherein the impact protection mechanism is an elastic cushion pad.
3. The sand control safety joint according to claim 2, wherein the inner ends of the shear pins are sleeved in the central hole of the elastic buffer pad.
4. The sand control safety joint according to claim 3, wherein the outer end of the shear pin is externally threaded and is screwed into a shear pin threaded hole formed in the upper joint.
5. The sand control safety joint of claim 1, 2 or 3 wherein the inner wall of the upper joint has an upper retention shoulder above the sealing sleeve, the inner diameter of the upper retention shoulder being less than the outer diameter of the sealing sleeve.
6. The sand control safety joint according to claim 5, wherein a spacer is further installed on the inner wall of the upper joint, the spacer serves as a lower limiting shoulder, the spacer is located below the sealing sleeve, and the inner diameter of the spacer is smaller than the outer diameter of the sealing sleeve.
7. The sand control safety joint as recited in claim 6 wherein the axial distance between the collar and the lowermost sand outlet is greater than or equal to the axial length of the sealing sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022195825.7U CN213510477U (en) | 2020-09-29 | 2020-09-29 | Safety joint for sand prevention |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022195825.7U CN213510477U (en) | 2020-09-29 | 2020-09-29 | Safety joint for sand prevention |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213510477U true CN213510477U (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022195825.7U Active CN213510477U (en) | 2020-09-29 | 2020-09-29 | Safety joint for sand prevention |
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| CN (1) | CN213510477U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944434A (en) * | 2021-10-28 | 2022-01-18 | 大庆市润百利科技有限公司 | Pressure-resistant safety short circuit |
-
2020
- 2020-09-29 CN CN202022195825.7U patent/CN213510477U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944434A (en) * | 2021-10-28 | 2022-01-18 | 大庆市润百利科技有限公司 | Pressure-resistant safety short circuit |
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