CN213235042U - Oil-water well is with examining casing string - Google Patents
Oil-water well is with examining casing string Download PDFInfo
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- CN213235042U CN213235042U CN202022239123.4U CN202022239123U CN213235042U CN 213235042 U CN213235042 U CN 213235042U CN 202022239123 U CN202022239123 U CN 202022239123U CN 213235042 U CN213235042 U CN 213235042U
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- oil drain
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Abstract
The utility model relates to an oil-water well is instrument in pit, in particular to oil-water well is with examining casing string. A casing testing string for oil and water wells, comprising: the throwing rod type oil drain device comprises an oil drain device body, wherein a hollow pin is arranged on the side wall of the oil drain device body in a penetrating manner, the hollow pin is suspended in the oil drain device body, the inner end of the hollow pin is a blind end, and the outer end of the hollow pin is an opening end and is used for being sheared under the impact of a throwing rod so as to communicate the inner space and the outer space of the oil drain device body; the packer is connected in series below the throwing rod type oil drainer and is used for sealing and isolating the annular space of the oil sleeve; the ball seat sliding sleeve is connected below the packer in series and comprises a sliding sleeve body, the sliding sleeve body is of a cylindrical structure, and an inner sliding sleeve and a steel ball are arranged in the sliding sleeve body; the inner sliding sleeve is assembled in the sliding sleeve body in a sliding mode and is axially positioned in the sliding sleeve body through shear pins; and the steel ball is arranged at the opening at the top of the inner sliding sleeve and used for plugging the inner sliding sleeve and shearing off the shear pin under the pressure of the oil pipe. Above-mentioned scheme has solved the unable problem of checking seal or testing the pipe of current test casing string.
Description
Technical Field
The utility model relates to an oil-water well is instrument in pit, in particular to oil-water well is with examining casing string.
Background
With the long-term development of oil and gas fields, the phenomenon that a plurality of old wells cause casing damage due to geological factors or engineering factors is increased day by day, and part of old wells cause casing corrosion due to well fluid corrosivity and cannot normally produce in serious conditions, so whether the casing is corroded and damaged or not needs to be determined, the condition of the casing above a production zone needs to be verified generally, and if the casing is damaged, the casing needs to be repaired or leaking stoppage so as to recover the normal production of an oil-water well.
The currently used sleeve inspection methods generally include the following two methods:
the first method is to adopt a flow controller matched with a packer and a plug to seat and seal the annular space of an oil sleeve at the position above the top of an oil layer, and to press the seat packer through an oil pipe and open the flow controller to verify the casing pipe. A leak finding string disclosed in patent document CN2454540Y, which consists of two parts, a choke and a packer; the flow controller comprises a joint, a central pipe, a valve core and a valve seat, wherein rubber is vulcanized on the surface of the valve core, and the packer is formed by connecting an upper joint, the central pipe and a lower joint in a threaded manner to form a main body; between the upper and lower joints, the outside of the inner core tube is sleeved with a rubber cylinder and a setting piston, and two ends of the rubber cylinder are provided with protective sleeves. The initial sealing pressure of the packer is smaller than the opening pressure of the throttler, during use, the packer is pressurized from an oil pipe, the packer is firstly set, the pressurization is continued, the throttler is opened, the annular communication of the oil sleeve is realized, and whether the damage condition of the sleeve is judged abnormally through the pressure. However, when the casing is damaged, the steel material at the damaged position on the casing wall may obstruct a tool to be run in, and may damage the rubber sleeve to a certain extent, so that the packer itself is not sealed, the casing testing string is pressed from the oil pipe and the bottom of the casing testing string is in a sealed state, and the sealing performance of the packer after the casing is run in place is difficult to verify, i.e. the sealing cannot be tested; meanwhile, if the stratum is seriously lacked, the condition of suck-back vacuum easily occurs below the packer, and the upper part of the packer bears the weight of liquid in the pipe column, so the packer is difficult to unseal under the dual acting force, or the packer is set again in the pipe unsealing process.
The second is that a bell mouth matched with a packer is adopted to seat and seal at the position above the top of an oil layer, the annular space of an oil sleeve is sealed, and the verification is carried out by pressing the sleeve; in the operation process of the casing testing string, if abnormal pressure display occurs, the pipe can not be tested, namely the integrity of the oil pipe can not be verified, so that the verification result is not consistent with the reality easily.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an profit is with testing casing string solves the unable problem of testing sealing or testing the pipe of current testing casing string.
The utility model discloses in a profit well is with testing casing string adopts following technical scheme:
a casing testing string for oil and water wells, comprising:
the rod-throwing type oil drain device comprises an oil drain device body, wherein the oil drain device body is of a cylindrical structure, and a hollow pin is arranged on the side wall in a penetrating manner;
the hollow pin is suspended in the oil drain device body, the inner end of the hollow pin is a blind end, and the outer end of the hollow pin is an opening end and is used for being sheared under the impact of the throwing rod so as to communicate the inner space and the outer space of the oil drain device body;
the oil and water well is with testing casing string still includes:
the packer is connected in series below the throwing rod type oil drainer and is used for sealing and isolating the annular space of the oil sleeve;
the ball seat sliding sleeve is connected below the packer in series and comprises a sliding sleeve body, the sliding sleeve body is of a cylindrical structure, and an inner sliding sleeve and a steel ball are arranged in the sliding sleeve body;
the inner sliding sleeve is assembled in the sliding sleeve body in a sliding mode and is axially positioned in the sliding sleeve body through shear pins;
and the steel ball is arranged at the opening at the top of the inner sliding sleeve and used for plugging the inner sliding sleeve and shearing off the shear pin under the pressure of the oil pipe.
Has the advantages that: by adopting the technical scheme, after the packer is set, the pipe inspection can be realized through the positive pressing of the oil pipe, and whether the pipe column has the leakage condition or not is determined; after the pipe is tested to be qualified, pressing is continued, a shear pin can be cut off through the pressure build-up of a steel ball of the ball seat sliding sleeve, the ball seat sliding sleeve is opened, and an oil sleeve below the packer is communicated, so that the sealing can be tested, and whether the sealing of the packer is intact is tested; after the seal is qualified, the sleeve is reversely pressed from the sleeve, so that the sleeve inspection can be realized, the functions of seal inspection, pipe inspection and sleeve inspection can be realized by putting a string once, and the completeness of a well entering tool and well conditions is determined; simultaneously, can follow the oil pipe and throw the pole formula bleeder after checking the cover and fit, let out the liquid in the oil jacket annular space in order to reduce the deblocking load, improve the deblocking reliability, and throw the pole formula bleeder and need open through throwing the pole to guaranteed to test sealing, test the pipe, test going on smoothly of cover, can also prevent to take out the liquid to cause the pollution when playing oil pipe.
As a preferred technical scheme: and a throwing rod guide inclined plane is arranged on the inner wall of the oil drainer body and is used for guiding the throwing rod to cut off the hollow pin.
Has the advantages that: the arrangement of the projection rod guide inclined plane is beneficial to guiding the projection rod to cut off the hollow pin, and the working reliability of the tubular column is improved.
As a preferred technical scheme: the inner wall of bleeder body includes thick portion, and thick portion offset is in the radial one side of bleeder body, the top that the injection arm guide inclined plane is located thick portion.
Has the advantages that: by adopting the technical scheme, the arrangement of the casting rod guide inclined plane is convenient, so that a better guide effect can be achieved.
As a preferred technical scheme: the hollow pin is arranged on the thicker part.
Has the advantages that: the hollow pin is arranged on the thicker part, so that the hollow pin is conveniently and reliably fixed, and the hollow pin is conveniently installed.
As a preferred technical scheme: and a steel ball guide inclined plane is arranged on the inner wall of the sliding sleeve body and is used for guiding the steel ball to seat and seal on the top opening of the inner sliding sleeve.
Has the advantages that: by adopting the technical scheme, the steel ball guide inclined plane is favorable for guiding the steel ball to accurately plug the top opening of the inner sliding sleeve, and the working reliability of the tubular column is improved.
As a preferred technical scheme: and a sealing ring is arranged between the inner sliding sleeve and the sliding sleeve body.
Has the advantages that: by adopting the technical scheme, the sealing performance is favorably improved, and the influence on the verification result caused by leakage between the inner sliding sleeve and the sliding sleeve body is avoided.
As a preferred technical scheme: the sealing rings are arranged above and below the shear pins.
Has the advantages that: adopt above-mentioned technical scheme can play better sealed effect.
As a preferred technical scheme: more than two sealing rings are arranged above the shear pins, and/or more than two sealing rings are arranged below the shear pins.
Has the advantages that: by adopting the technical scheme, the device can adapt to larger pressing pressure and ensure reliability.
As a preferred technical scheme: and a connecting pipe is arranged between the packer and the rod-throwing type oil drain device and/or the ball seat sliding sleeve.
Has the advantages that: by adopting the technical scheme, the packer can be conveniently connected with the rod-throwing type oil drain device and/or the ball seat sliding sleeve.
As a preferred technical scheme: the lateral communication holes are formed in the side wall of the sliding sleeve body and used for enabling the inner space and the outer space of the sliding sleeve body to be communicated after the inner sliding sleeve moves downwards and passes through the lateral communication holes.
Has the advantages that: the lateral communicating holes are favorable for ensuring the smooth opening of the ball seat sliding sleeve, and the reliability is good.
For the subject to be protected by the present patent, each preferred technical solution under the same subject may be adopted alone, and when the preferred technical solutions under the same subject can be combined, two or more preferred technical solutions under the same subject may be arbitrarily combined, and the technical solutions formed by the combination are not specifically described here, and are included in the description of the present patent in this form.
Drawings
Fig. 1 is a schematic structural diagram of a casing testing string for an oil-water well according to the present invention;
the names of the components corresponding to the corresponding reference numerals in the drawings are: 10-a well tubing, 20-a rod-throwing type oil drainer, 30-a packer and 40-a ball seat sliding sleeve;
FIG. 2 is a schematic view of the drop leg of FIG. 1;
the names of the components corresponding to the corresponding reference numerals in the drawings are: 21-an oil drainer body, 22-a hollow pin, 23-a blind end, 24-an opening end and 25-a rod guide inclined plane;
FIG. 3 is a schematic structural view of the ball seat sliding sleeve in FIG. 1;
the names of the components corresponding to the corresponding reference numerals in the drawings are: 41-a sliding sleeve body, 42-a steel ball, 43-an inner sliding sleeve, 44-a shear pin, 45-a lateral communicating hole, 46-a steel ball guide inclined plane and 47-a sealing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as the terms first and second, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
The present invention will be described in further detail with reference to examples.
The utility model discloses in oil water well is with examining embodiment 1 of casing string:
as shown in FIG. 1, the test casing string for oil and water wells comprises a well tubing, and further comprises a drop bar type oil drain device 20, a packer 30 and a ball seat sliding sleeve 40 which are connected in series on the well tubing 10 from top to bottom. The well tubing 10 includes a first tubing section disposed above the drop bar bleeder 20, a second tubing section disposed between the drop bar bleeder 20 and the packer 30, and a third tubing section disposed between the ball seat sliding sleeve 40 and the packer 30, the second and third tubing sections forming a connecting tube.
As shown in fig. 2, the drop bar type oil drain device 20 comprises an oil drain device body 21, the oil drain device body 21 is of a cylindrical structure, the inner wall of the drop bar type oil drain device body comprises a thick portion, the thick portion is offset to one side of the radial direction of the oil drain device body, a drop bar guiding inclined surface 25 is arranged on the side wall of the top of the thick portion, and the drop bar guiding inclined surface 25 is used for guiding the drop bar. The thicker part is provided with a pin hole, a hollow pin 22 penetrates through the pin hole, the hollow pin 22 is suspended in the oil drain body 21, the inner end is a blind end 23 to form a closed structure, and the outer end is an open end 24 to form an open structure, so that the hollow pin is sheared under the impact of a throwing rod to communicate the inner space and the outer space of the oil drain body 21. Of course, to achieve a better seal, the hollow pin 22 may be fitted with a sealing element, such as a gasket, etc., to form a sealing fit with the pin hole of the drip body 21. When the device is used, a throwing rod is thrown into the pipe column, the throwing rod is accelerated under the action of gravity, impacts and shears the hollow pin 22, and an oil sleeve is communicated, namely an oil pipe and a sleeve are communicated. It should be noted that the hollow pin 22 may be fixed to the oil drain body 21 by a threaded connection, a stop step may be provided on the pin hole, a hole retaining ring may be provided at the outer end of the hollow pin 22, the axial positioning of the hollow pin 22 is realized by the stop step and the retaining ring, and the hollow pin may be fixed to the oil drain body 21 by a bonding method, an interference fit method, or the like.
The packer 30 is connected in series between the drop rod type oil drain 20 and the ball seat sliding sleeve 40, and is a well tool commonly used in the prior art, and is provided with an elastic sealing element and can be used for sealing off the oil sleeve annulus, and the specific structure is not described in detail here.
As shown in fig. 3, the ball seat sliding sleeve 40 includes a sliding sleeve body 41, an inner sliding sleeve 43 and a steel ball 42, a shear pin 44 is screwed into a threaded hole provided on a side wall of the sliding sleeve body 41, and is inserted into the inner sliding sleeve 43, so that the inner sliding sleeve 43 is fixed on the sliding sleeve body 41 by the shear pin 44; the steel ball 42 arranged on the inner sliding sleeve 43 can cut off the shear pin 44 by pressing, and the lateral communicating hole 45 on the sliding sleeve body 41 is opened, so that the oil sleeve communicating function is realized. Of course, to ensure that the test tube is successfully performed, the shear force of the shear pin 44 should be slightly higher than the test tube pressure. In order to guide the steel ball 42 to seat on the top opening of the inner sliding sleeve 43, a steel ball guide inclined plane 46 is arranged on the inner wall of the sliding sleeve body 41; in order to improve the sealing performance, two sealing rings 47 are arranged above and below the shear pin 44, two sealing rings 47 are arranged above the shear pin 44, and two sealing rings 47 are arranged below the shear pin 44.
Will the utility model provides a profit is with testing the casing string equipment and is accomplished the back, guarantees to throw rod-type bleeder 20 and does not open. In the process of setting the test casing string into the casing for the oil-water well, the steel ball 42 moves upwards, the ball seat sliding sleeve 40 is opened, and the pressure balance of a liquid column in the oil casing is kept between the oil casing annulus and the oil pipe through the ball seat sliding sleeve 40. When the position required by the design is reached, the packer 30 is set, and the test pipe is just pressed from the oil pipe, so that the condition that the well entering pipe column has no leakage is ensured. And after the pipe is tested to be qualified, pressurization is continued, the ball seat sliding sleeve 40 is opened, the oil sleeve below the packer 30 is communicated at the moment, and sealing can be tested to ensure that the packer 30 is sealed completely. And (5) after the seal is tested to be qualified, reversely pressing the sleeve to test the sleeve. After the sleeve is checked to be qualified, the rod-throwing type oil drain device 20 can be opened by throwing the rod from the oil pipe, liquid in the annular space of the oil sleeve is discharged to reduce the deblocking load, and meanwhile, the pollution caused by the liquid brought out when the oil pipe is lifted is prevented. Therefore, the functions of seal checking, pipe checking and sleeve checking can be realized by running the pipe column once, and the well entering tool and the well condition are determined to be intact.
The utility model discloses in the oil water well is with examining embodiment 2 of casing string:
the difference between the embodiment and the embodiment 1 is that in the embodiment 1, a lateral communication hole 45 is formed in the side wall of the sliding sleeve body 41, and the lateral communication hole 45 is located above the shear pin; in this embodiment, the lateral communication hole 45 is located below the shear pin.
The utility model discloses in oil water well is with examining embodiment 3 of casing string:
the difference between this embodiment and embodiment 1 is that in embodiment 1, the side wall of the sliding sleeve body is provided with a lateral communication hole 45, while in this embodiment, the side wall of the sliding sleeve body is a closed side wall, and the lateral communication hole is not provided, and the inner sliding sleeve 43 is pulled out from the bottom end of the pipe string when the steel ball 42 is pressed, so as to realize the communication of the oil jacket below the packer 30.
The utility model discloses in the oil water well is with examining embodiment 4 of casing string:
the difference between this embodiment and embodiment 1 is that, in embodiment 1, the inner wall of the oil drain body includes a thick portion, and the thick portion is offset to one side in the radial direction of the oil drain body, and in this embodiment, the wall thickness of the inner wall of the oil drain body is uniform, and the projection guiding inclined plane is an annular inclined plane.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.
Claims (10)
1. An oil and water well testing casing string, comprising:
the oil drain device comprises a throwing rod type oil drain device (20), wherein the throwing rod type oil drain device (20) comprises an oil drain device body (21), the oil drain device body (21) is of a cylindrical structure, and a hollow pin (22) penetrates through the side wall of the oil drain device body;
the hollow pin (22) is suspended in the oil drain device body (21), the inner end of the hollow pin is a blind end (23), the outer end of the hollow pin is an open end (24), and the hollow pin is sheared under the impact of a throwing rod to communicate the inner space and the outer space of the oil drain device body (21);
the oil and water well is with testing casing string still includes:
the packer (30) is connected below the drop rod type oil drainer (20) in series and used for packing and isolating the annular space of the oil sleeve;
the ball seat sliding sleeve (40) is connected below the packer (30) in series and comprises a sliding sleeve body (41), the sliding sleeve body (41) is of a cylindrical structure, and an inner sliding sleeve (43) and a steel ball (42) are arranged in the sliding sleeve body;
the inner sliding sleeve (43) is assembled in the sliding sleeve body (41) in a sliding mode and is positioned in the sliding sleeve body (41) along the axial direction through shear pins (44);
and the steel ball (42) is arranged at an opening at the top of the inner sliding sleeve (43) and is used for plugging the inner sliding sleeve (43) and shearing off the shear pin (44) under the pressure of the oil pipe.
2. The test casing string for oil and water wells as defined in claim 1, wherein a pin guiding inclined surface (25) is provided on an inner wall of the oil drain body (21), and the pin guiding inclined surface (25) is used for guiding the pin to shear the hollow pin (22).
3. The well testing string as recited in claim 2, characterized in that the inner wall of the bleeder body (21) comprises a thicker portion, the thicker portion is offset to one side of the radial direction of the bleeder body (21), and the throw bar guide slope (25) is located at the top of the thicker portion.
4. The well testing string of claim 3, wherein said hollow pin (22) is disposed on a thicker portion.
5. The string for testing wells and oil and water as claimed in any one of claims 1 to 4, wherein the inner wall of the sliding sleeve body (41) is provided with a steel ball guide slope (46), and the steel ball guide slope (46) is used for guiding the steel ball (42) to be seated on the top opening of the inner sliding sleeve (43).
6. The well testing string according to any one of claims 1 to 4, wherein a sealing ring (47) is arranged between the inner sliding sleeve (43) and the sliding sleeve body (41).
7. The well testing string according to claim 6, wherein the sealing rings (47) are arranged above and below the shear pins (44).
8. The string for testing oil and water wells according to claim 7, wherein more than two sealing rings (47) are arranged above the shear pin (44) and/or more than two sealing rings (47) are arranged below the shear pin (44).
9. The well testing string of any of claims 1 to 4, wherein a connecting pipe is provided between the packer (30) and the drop rod (20) and/or the ball seat sliding sleeve (40).
10. The string for testing oil and water wells according to any one of claims 1 to 4, wherein a lateral communication hole (45) is provided on a sidewall of the sliding sleeve body (41), and the lateral communication hole (45) is used for communicating an inner space and an outer space of the sliding sleeve body (41) after the inner sliding sleeve (43) moves downward and passes through the lateral communication hole (45).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022239123.4U CN213235042U (en) | 2020-10-10 | 2020-10-10 | Oil-water well is with examining casing string |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022239123.4U CN213235042U (en) | 2020-10-10 | 2020-10-10 | Oil-water well is with examining casing string |
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| CN213235042U true CN213235042U (en) | 2021-05-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115704316A (en) * | 2021-08-12 | 2023-02-17 | 中国石油化工股份有限公司 | Throwing rod type pipe inspection device and application thereof |
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2020
- 2020-10-10 CN CN202022239123.4U patent/CN213235042U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115704316A (en) * | 2021-08-12 | 2023-02-17 | 中国石油化工股份有限公司 | Throwing rod type pipe inspection device and application thereof |
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