CN214997576U - RD type toe end sliding sleeve - Google Patents
RD type toe end sliding sleeve Download PDFInfo
- Publication number
- CN214997576U CN214997576U CN202121092179.XU CN202121092179U CN214997576U CN 214997576 U CN214997576 U CN 214997576U CN 202121092179 U CN202121092179 U CN 202121092179U CN 214997576 U CN214997576 U CN 214997576U
- Authority
- CN
- China
- Prior art keywords
- mandrel
- piston
- baffle ring
- sliding sleeve
- outer cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model belongs to the technical field of the oil field development, a RD type toe end sliding sleeve is disclosed, the utility model discloses a RD type toe end sliding sleeve is the differential pressure formula sliding sleeve of rupture disc control opening pressure, be the leading tool of oil gas well casing completion, not only can use in well cementation sliding sleeve multilayer segmentation fracturing operation, can also use with bridging plug perforation seat system cooperation, through installing this sliding sleeve at first section position, the intraductal pressure of beating of directness in the fracturing construction is opened the sliding sleeve and is carried out first section construction operation, the expense of going into the perforating operation under having saved a continuous oil pipe, operating time and operation risk have also been reduced simultaneously.
Description
Technical Field
The utility model belongs to the technical field of oil field development, concretely relates to RD type toe end sliding sleeve.
Background
After the well cementation of the oil-gas well casing is finished, the shaft is a closed cavity, and in order to provide a liquid inlet channel for later fracturing modification, a cement sheath outside the casing machine at the toe end of a well completion pipe column needs to be opened, so that the aim of communicating the shaft with a bottom layer is fulfilled. For a vertical well completed by a whole casing, a continuous oil pipe, an oil pipe or a cable is generally adopted to put a hydraulic or thermal perforating gun to achieve the purpose, for a well in which a differential casing sliding sleeve fracturing tool participates in well cementation, due to the existence of a multi-stage differential sliding sleeve, the inner diameter of a pipe column is gradually reduced from top to bottom, the pipe column can be put into and the outer diameter of the perforating tool is smaller, at present, the continuous oil pipe or the cable can only be selected to put the thermal perforating gun to perforate, and the defects that the continuous oil pipe or the cable is complex in operation process and high in cost are caused; and because the conventional perforating gun has a limited outer diameter; and the perforation is disposable, and the perforation can not be repeatedly opened and closed at the later stage.
The conventional differential pressure sliding sleeve is mainly applied to staged fracturing operation of an open hole well, and does not need to be subjected to the working condition of full-well-barrel pressure testing; if in the well cementation environment, cement slurry is easy to intrude into the hydraulic cavity through the pressure transmission hole, so that the opening of the differential pressure sliding sleeve is influenced; if the pressure test operation of the whole shaft is required to be carried out before the sliding sleeve is opened, the conventional pressure difference sliding sleeve is limited by the shearing force of the shearing pin, so that the required pressure test pressure is difficult to reach.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of above-mentioned prior art, provide a RD type toe end sliding sleeve, overcome the problem that exists among the prior art.
In order to solve the technical problem, the technical scheme of the utility model is that: an RD-type toe end sliding sleeve comprises an upper connector, a sealing sleeve, a baffle ring, a mandrel, an outer barrel, a piston, a limiting component, a rupture disc and a lower connector, wherein one end of the mandrel is connected with the upper connector, the other end of the mandrel is connected with the lower connector, the sealing sleeve, the baffle ring, the outer barrel and the piston are coaxially sleeved outside the mandrel, one end of the sealing sleeve is close to the upper connector, the other end of the sealing sleeve is connected with the outer barrel, the other end of the outer barrel is connected with the outer wall of the mandrel, the baffle ring and the piston are coaxially sleeved between the outer barrel and the mandrel, circulation holes are formed in corresponding positions of the outer barrel and the mandrel, the baffle ring is arranged close to one side of the sealing sleeve, the piston is arranged close to one side of the lower connector, the circulation holes of the outer barrel and the mandrel are blocked by the piston, the piston and the mandrel are axially limited by the limiting component, an annular cavity is defined by the sealing sleeve, the mandrel, the outer barrel and the piston, and the rupture disc are arranged in a corresponding vacancy at one end of the mandrel, close to the lower connector, after the corresponding vacant site is opened, the corresponding vacant site is communicated with the end face of the piston, when the rupture disc is opened in a blasting mode, the piston moves towards the baffle ring along the annular cavity by the hydraulic shearing limiting assembly, meanwhile, the circulating holes in the corresponding positions of the outer cylinder and the mandrel are opened, and then the front end of the piston is locked at the baffle ring.
Preferably, one end of the mandrel is in threaded connection with the upper joint, the other end of the mandrel is in threaded connection with the lower joint, the seal sleeve is in threaded connection with the outer cylinder, the other end of the outer cylinder is flush with the outer wall shoulder of the mandrel and is in threaded connection, and the rupture disc is installed in a corresponding vacant position of the mandrel and is in threaded connection.
Preferably, the mandrel is provided with two corresponding vacant positions at one end close to the lower joint, the two corresponding vacant positions are opposite, and the two corresponding vacant positions are respectively in threaded connection with a rupture disc.
Preferably, the inner diameter of the baffle ring is larger than the outer diameter of the mandrel, the inner diameter of the baffle ring is smaller than the inner diameter of the outer barrel, the baffle ring is arranged at the step position of the inner wall of one side, close to the sealing sleeve, of the outer barrel, a chamfer inclined plane is arranged at one end, far away from the sealing sleeve, of the baffle ring, and the end, close to the sealing sleeve, of the baffle ring is arranged to be a right angle.
Preferably, the piston is close to and keeps off ring one end and is provided with the pawl, and the pawl is close to and keeps off ring one end and be provided with the locking arch, the locking arch is close to and keeps off ring one end and be provided with the chamfer, and the locking arch is kept away from and is kept off ring one end and set up to the right angle, and when the piston removed to keeping off the ring along annular cavity, the bellied chamfer of locking and the cooperation of chamfer inclined plane of pawl front end made the pawl compression and passed and keep off the ring, passed and kept off the ring back pawl recovery, and the bellied right angle of locking and the right angle cooperation that keeps off the ring locked the piston in keeping off ring department.
Preferably, the limiting assembly is a shear pin, and the piston and the mandrel are radially fixed by the shear pin.
Preferably, the circulating holes in the mandrel are a plurality of strip-shaped circulating holes which are uniformly distributed in the circumferential direction of the mandrel, and the straight line where the circulating holes in the mandrel are located is parallel to the axial direction of the mandrel; the circulation hole on the urceolus is a plurality of bar circulation holes, and a plurality of bar circulation holes evenly distributed is in urceolus circumference to circulation hole place straight line on the urceolus has the contained angle with the urceolus axial.
Compared with the prior art, the utility model has the advantages of:
(1) the utility model discloses a RD type toe end sliding sleeve is the differential pressure type sliding sleeve of rupture disc control opening pressure, is the main instrument of oil gas well casing completion, not only can use in well cementation sliding sleeve multilayer segmentation fracturing operation, can also use with the cooperation of bridging plug perforation continuous sitting system, through installing this sliding sleeve in first section position, directly intraductal the pressure of beating in the fracturing construction is opened the sliding sleeve and is carried out the construction operation of first section, saved the expense of a continuous oil pipe running-in perforation operation, also reduced operating time and operation risk simultaneously;
(2) the RD-shaped toe end sliding sleeve of the utility model adopts a double-rupture-disc structure, so that the sliding sleeve can be ensured to be successfully opened, the opening pressure does not exceed the pressure of casing pressure test, and the casing is ensured to be intact; the mandrel, the outer cylinder and the piston are optimally designed in a three-layer structure, so that the wall thickness of each part is optimally distributed on the basis of meeting the pressure-bearing requirement, and the stress state of the sliding sleeve during opening is improved; the inner and outer circulation holes of the mandrel and the outer cylinder are protected and treated, so that the mandrel and the outer cylinder are prevented from contacting well cementation cement, and the sliding sleeve is favorably opened;
(3) the piston of the RD-type toe end sliding sleeve is provided with the shearing pin and the pawl, the piston is in the position of blocking the circulation hole before the rupture disk is opened, the piston moves to the position of the baffle ring after the rupture disk is opened, the circulation hole is opened and is locked at the position of the baffle ring, and the position fixation before and after the rupture disk is opened is ensured;
(4) the RD-shaped toe end sliding sleeve has large inner diameter, and realizes full drift diameter; the large flow passage design is adopted, the fracturing pressure is not lost, the cutting outer diameter is relatively small, the well entering operation is facilitated, the bearing capacity is higher compared with a foreign weather ford tool, the length is shorter, perforation can be avoided, and direct fracturing is realized.
Drawings
Fig. 1 is a schematic structural view of an RD-shaped toe end sliding sleeve of the present invention;
fig. 2 is a schematic view of a retainer ring structure of an RD-shaped toe end sliding sleeve of the present invention;
fig. 3 is a schematic view of the piston structure of the RD-shaped toe end sliding sleeve of the present invention.
Description of reference numerals:
1. the device comprises an upper joint, 2, a sealing sleeve, 3, a baffle ring, 4, a mandrel, 5, an outer cylinder, 6, a piston, 7, a limiting component, 8, a rupture disc, 9, a lower joint, 10, a circulating hole, 11 and an annular cavity;
3-1, chamfering an inclined plane;
6-1, a pawl, 6-2, a locking bulge, 6-3 and a chamfer.
Detailed Description
The following description of the embodiments of the present invention is provided in connection with the following embodiments:
it should be noted that the structures, ratios, sizes, etc. illustrated in the present specification are only used to cooperate with the contents disclosed in the specification for the understanding and reading of the people skilled in the art, and are not used to limit the limit conditions that the present invention can be implemented, and any modifications of the structures, changes of the ratio relationships or adjustments of the sizes should still fall within the scope that the technical contents disclosed in the present invention can cover without affecting the functions and the achievable purposes of the present invention.
Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Example 1
As shown in figure 1, the utility model discloses an RD type toe end sliding sleeve, which comprises an upper joint 1, a sealing sleeve 2, a baffle ring 3, a mandrel 4, an outer barrel 5, a piston 6, a limiting component 7, a rupture disc 8 and a lower joint 9, wherein one end of the mandrel 4 is connected with the upper joint 1, the other end of the mandrel 4 is connected with the lower joint 9, the sealing sleeve 2, the baffle ring 3, the outer barrel 5 and the piston 6 are coaxially sleeved outside the mandrel 4, one end of the sealing sleeve 2 is close to the upper joint 1, the other end of the sealing sleeve 2 is connected with the outer barrel 5, the other end of the outer barrel 5 is connected with the outer wall of the mandrel 4, the baffle ring 3 and the piston 6 are coaxially sleeved between the outer barrel 5 and the mandrel 4, the corresponding positions of the outer barrel 5 and the mandrel 4 are provided with a circulation hole 10, the baffle ring 3 is arranged close to one side of the sealing sleeve 2, the piston 6 is arranged close to one side of the lower joint 9, and the piston 6 separates the circulation holes 10 of the outer barrel 5 and the mandrel 4, the piston 6 and the mandrel 4 are axially limited through a limiting component 7, the sealing sleeve 2, the mandrel 4, the outer cylinder 5 and the piston 6 enclose an annular cavity 11, the rupture disc 8 is arranged in a corresponding hole position 4-1 at one end, close to the lower joint 9, of the mandrel 4, the corresponding hole position 4-1 is communicated with the end face of the piston 6 after being opened, after the rupture disc 8 is exploded and opened, the limiting component 7 is sheared hydraulically to enable the piston 6 to move towards the baffle ring 3 along the annular cavity 11, meanwhile, the circulating hole 10 in the corresponding position of the outer cylinder 5 and the mandrel 4 is opened, and then the front end of the piston 6 is locked at the baffle ring 3.
Example 2
As shown in fig. 1, preferably, one end of the mandrel 4 is screwed with the upper joint 1, the other end of the mandrel 4 is screwed with the lower joint 9, the sealing sleeve 2 is screwed with the outer cylinder 5, the other end of the outer cylinder 5 is flush with and screwed with the outer wall shoulder of the mandrel 4, and the rupture disc 8 is installed in the corresponding hole position 4-1 of the mandrel 4 and is screwed.
Preferably, one end of the mandrel 4 close to the lower joint 9 is provided with two corresponding hole sites 4-1, the two corresponding hole sites 4-1 are opposite, and the two corresponding hole sites 4-1 are respectively in threaded connection with a rupture disc 8.
Be provided with two corresponding hole sites 4-1 on the 4 cross sections of dabber relatively, two correspond hole sites 4-1 and have rupture disc 8 through threaded connection respectively, the utility model discloses a two rupture disc structures ensure that the sliding sleeve can successfully be opened, and opening pressure is no longer than sleeve pipe pressure testing pressure, ensures that the sleeve pipe is intact.
Example 3
As shown in fig. 2, preferably, the inner diameter of the baffle ring 3 is larger than the outer diameter of the mandrel 4, the inner diameter of the baffle ring 3 is smaller than the inner diameter of the outer cylinder 5, the baffle ring 3 is arranged at the step of the inner wall of the outer cylinder 5 on the side close to the sealing sleeve 2, a chamfer inclined plane 3-1 is arranged at one end of the baffle ring 3 far away from the sealing sleeve 2, and a right angle is arranged at one end of the baffle ring 3 close to the sealing sleeve 2.
Example 4
As shown in fig. 3, preferably, a pawl 6-1 is arranged at one end of the piston 6 close to the retainer ring 3, a locking protrusion 6-2 is arranged at one end of the pawl 6-1 close to the retainer ring 3, a chamfer 6-3 is arranged at one end of the locking protrusion 6-2 close to the retainer ring 3, and one end of the locking protrusion 6-2 away from the retainer ring 3 is arranged to be a right angle, when the piston 6 moves towards the retainer ring 3 along the annular cavity 11, the chamfer 6-3 of the locking protrusion 6-2 at the front end of the pawl 6-1 cooperates with the chamfer 3-1 to enable the pawl 6-1 to be compressed and to penetrate through the retainer ring 3, after penetrating through the retainer ring 3, the pawl 6-1 is flicked, and the right angle of the locking protrusion 6-2 cooperates with the right angle of the retainer ring 3 to lock the piston 6 at the retainer ring 3.
Example 5
As shown in fig. 1, the limiting component 7 is preferably a shear pin, and the shear pin fixes the piston 6 and the mandrel 4 in a radial direction.
As shown in fig. 1, preferably, the circulation holes 10 on the mandrel 4 are a plurality of strip-shaped circulation holes, the plurality of strip-shaped circulation holes are uniformly distributed in the circumferential direction of the mandrel 4, and the straight line of the circulation holes 10 on the mandrel 4 is axially parallel to the mandrel 4; the circulation holes 10 on the outer barrel 5 are a plurality of strip-shaped circulation holes which are uniformly distributed in the circumferential direction of the outer barrel 5, and an included angle is formed between a straight line where the circulation holes 10 on the outer barrel 5 are located and the axial direction of the outer barrel 5.
The circulating holes 10 on the outer barrel 5 are coated with high-temperature sealing grease, so that the circulating holes 10 on the outer barrel 5 are protected, contact with well cementation cement is avoided, and opening of the sliding sleeve is facilitated.
On the basis of meeting the tensile strength, the outer cylinder 5 adopts a mode that the circular holes 10 are uniformly distributed in the circumferential inclined holes, and a large flow passage design is adopted, so that the fracturing pressure is not lost.
The working principle of the utility model is as follows:
the utility model discloses a RD type toe end sliding sleeve is the well cementation sliding sleeve that controllable pressure opened, mainly by top connection 1, the seal cover 2, keep off ring 3, dabber 4, the urceolus 5, piston 6, spacing subassembly 7, rupture disk 8 and lower clutch 9 are constituteed, the instrument is according to the experimental pressure customization rupture disk 8 that the sleeve pipe set for before going into the well, be connected to sleeve pipe preset position, wait to be down to the position, after the well cementation is accomplished, seal up the test to the sleeve pipe, when intraductal beat to the experimental pressure of settlement, intraductal pressurize, 8 explosions of rupture disk are opened this moment, piston 6 moves up under the intraductal pressure effect and cuts spacing subassembly 7, piston 7 continues to move up and locks through keeping off ring 3, open circulation hole 10 completely, make intraductal and stratum communicate, just can directly carry out fracturing to the stratum.
The RD type toe end sliding sleeve mainly comprises a constant pressure structure and a locking structure:
the structure of the constant pressure part: the toe end sliding sleeve constant pressure part mainly comprises an upper joint 1, a mandrel 4, a rupture disc 8, a limiting component 7, a lower joint 9 and the like; the rupture disk 8 controls the opening pressure, and when the rupture disk 8 is broken and opened by the preset pressure, the pressure in the pipe pushes the piston 6 to shear the limiting component 7 and move upwards;
the locking part structure: the toe end sliding sleeve locking part mainly comprises a mandrel 4, a sealing sleeve 2, a baffle ring 3, an outer cylinder 5 and a piston 6; the mandrel 4, the outer cylinder 5, the piston 6 and the sealing sleeve 2 form an annular cavity 11, when the rupture disc 8 is opened by explosion, pressure pushes the piston 6 to move upwards, the pawl 6-1 in the front of the piston 6 pushes the baffle ring 3, the pawl 6-1 is locked after being bounced open, and the circulation hole 10 is ensured to be completely opened.
Assembling position relation of the RD type toe end sliding sleeve from right to left:
the lower joint 9 is in threaded connection with the mandrel 4;
the rupture disk 8 is arranged on the mandrel 4 corresponding to the hole position 4-1 and is in threaded connection;
the piston 6 is arranged from the upper end of the mandrel 4 to block the circulating hole 10 in the middle of the mandrel 4 and is aligned with the shoulder of the mandrel 4;
the limiting assembly 7 is arranged on a pin shearing hole position corresponding to the piston 6 and the mandrel 4;
the outer cylinder 5 is sleeved outside the piston 6 and is in threaded connection with the mandrel 4;
the baffle ring 3 is assembled at the step of the inner hole of the outer cylinder 5;
the seal sleeve 2 is arranged on the mandrel 4 and is in threaded connection with the outer cylinder 5;
the upper connector 1 is in threaded connection with the mandrel 4.
The RD type toe end sliding sleeve working process comprises the following steps:
after the oil-gas well is fixed, the casing pipe is tested, the pipe column is pressed to a set sealing test pressure, and the rupture disc 8 is exploded and opened to form a liquid passing channel;
the pressure in the pipe is transferred to the sealing surface at the lower end of the piston 6 through well fluid to push the piston 6 to move upwards;
the piston 6 moves upwards to cut the limiting component 7, and the limiting component 7 ensures that the position of the piston 6 is fixed before the rupture disc 8 is opened;
after the assembly 7 is limited, the piston 6 continuously moves upwards to pass through the baffle ring 3, and the pawl 6-1 at the front section of the piston 6 is bounced off and locked;
and the circulating hole of the mandrel 4 is completely communicated with the circulating hole of the outer barrel 5, and the bottom layer is directly fractured.
The utility model discloses a RD type toe end sliding sleeve is the differential pressure formula sliding sleeve of rupture disc control opening pressure, be the main instrument of oil gas well casing completion, not only can use in well cementation sliding sleeve multilayer segmentation fracturing operation, can also use with the cooperation of bridging plug perforation company seat system, through this sliding sleeve of first section position installation, the direct intraductal pressure of beating in the fracturing construction is opened the sliding sleeve and is carried out first section construction operation, the expense of going into the perforation operation under the continuous oil pipe has been saved, operating time and operation risk have also been reduced simultaneously.
The RD-shaped toe end sliding sleeve of the utility model adopts a double-rupture-disc structure, so that the sliding sleeve can be ensured to be successfully opened, the opening pressure does not exceed the pressure of casing pressure test, and the casing is ensured to be intact; the mandrel, the outer cylinder and the piston are optimally designed in a three-layer structure, so that the wall thickness of each part is optimally distributed on the basis of meeting the pressure-bearing requirement, and the stress state of the sliding sleeve during opening is improved; the inner and outer circulation holes of the mandrel and the outer barrel are protected and treated, so that the contact with well cementation cement is avoided, and the opening of the sliding sleeve is facilitated.
The utility model discloses the piston of RD type toe end sliding sleeve is provided with shearing pin and pawl, guarantees that the rupture disk opens the position that the front piston is in separation circulation hole, and the rupture disk opens the back piston and moves to keeping off the ring position, opens the circulation hole to lock in keeping off the ring position, guaranteed that the rupture disk opens front and back rigidity.
The RD-shaped toe end sliding sleeve has large inner diameter, and realizes full drift diameter; the large flow passage design is adopted, the fracturing pressure is not lost, the cutting outer diameter is relatively small, the well entering operation is facilitated, the bearing capacity is higher compared with a foreign weather ford tool, the length is shorter, perforation can be avoided, and direct fracturing is realized.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.
Claims (7)
1. An RD type toe end sliding sleeve which is characterized in that: the device comprises an upper joint (1), a sealing sleeve (2), a baffle ring (3), a mandrel (4), an outer cylinder (5), a piston (6), a limiting component (7), a rupture disc (8) and a lower joint (9), wherein one end of the mandrel (4) is connected with the upper joint (1), the other end of the mandrel (4) is connected with the lower joint (9), the sealing sleeve (2), the baffle ring (3), the outer cylinder (5) and the piston (6) are coaxially sleeved outside the mandrel (4), one end of the sealing sleeve (2) is close to the upper joint (1), the other end of the sealing sleeve (2) is connected with the outer cylinder (5), the other end of the outer cylinder (5) is connected with the outer wall of the mandrel (4), the baffle ring (3) and the piston (6) are coaxially sleeved between the outer cylinder (5) and the mandrel (4), a circulation hole (10) is arranged at the corresponding position of the outer cylinder (5) and the mandrel (4), and the baffle ring (3) is arranged close to one side of the mandrel (2), the piston (6) is arranged close to one side of the lower joint (9), the piston (6) separates the circulating holes (10) of the outer cylinder (5) and the mandrel (4), the piston (6) and the mandrel (4) are axially limited through the limiting component (7), the sealing sleeve (2), the mandrel (4), the outer cylinder (5) and the piston (6) enclose an annular cavity (11), the rupture disc (8) is arranged in a corresponding hole position (4-1) at one end of the mandrel (4) close to the lower joint (9), wherein the corresponding hole site (4-1) is communicated with the end surface of the piston (6) after being opened, when the rupture disc (8) is opened by explosion, the hydraulic shearing and limiting component (7) enables the piston (6) to move towards the baffle ring (3) along the annular cavity (11), and simultaneously, opening the circulating holes (10) at the corresponding positions of the outer cylinder (5) and the mandrel (4), and then locking the front end of the piston (6) at the position of the retaining ring (3).
2. An RD-type toe end runner as claimed in claim 1, wherein: one end of the mandrel (4) is in threaded connection with the upper joint (1), the other end of the mandrel (4) is in threaded connection with the lower joint (9), the sealing sleeve (2) is in threaded connection with the outer cylinder (5), the other end of the outer cylinder (5) is flush with the outer wall shoulder of the mandrel (4) and is in threaded connection, and the rupture disc (8) is installed in the corresponding hole position (4-1) of the mandrel (4) and is in threaded connection.
3. An RD-type toe end runner as claimed in claim 1, wherein: one end of the mandrel (4), which is close to the lower joint (9), is provided with two corresponding hole sites (4-1), the two corresponding hole sites (4-1) are opposite in position, and the two corresponding hole sites (4-1) are respectively in threaded connection with a rupture disc (8).
4. An RD-type toe end runner as claimed in claim 1, wherein: the inner diameter of the baffle ring (3) is larger than the outer diameter of the mandrel (4), the inner diameter of the baffle ring (3) is smaller than the inner diameter of the outer barrel (5), the baffle ring (3) is arranged at the step position of the inner wall of one side, close to the sealing sleeve (2), of the outer barrel (5), a chamfer inclined plane (3-1) is arranged at one end, far away from the sealing sleeve (2), of the baffle ring (3), and one end, close to the sealing sleeve (2), of the baffle ring (3) is arranged to be a right angle.
5. An RD-type toe end runner as claimed in claim 4, wherein: a pawl (6-1) is arranged at one end of the piston (6) close to the baffle ring (3), a locking bulge (6-2) is arranged at one end of the pawl (6-1) close to the baffle ring (3), a chamfer (6-3) is arranged at one end of the locking bulge (6-2) close to the baffle ring (3), one end of the locking bulge (6-2) far away from the baffle ring (3) is arranged to be a right angle, when the piston (6) moves along the annular cavity (11) to the baffle ring (3), the chamfer (6-3) of the locking bulge (6-2) at the front end of the pawl (6-1) is matched with the chamfer inclined plane (3-1) to enable the pawl (6-1) to be compressed and penetrate through the baffle ring (3), the pawl (6-1) bounces after penetrating through the baffle ring (3), and the right angle of the locking bulge (6-2) is matched with the right angle of the baffle ring (3) to lock the piston (6) at the position of the baffle ring (3).
6. An RD-type toe end runner as claimed in claim 1, wherein: the limiting assembly (7) is a shearing pin, and the piston (6) and the mandrel (4) are radially fixed by the shearing pin.
7. An RD-type toe end runner as claimed in claim 1, wherein: the circulating holes (10) in the mandrel (4) are a plurality of strip-shaped circulating holes which are uniformly distributed in the circumferential direction of the mandrel (4), and the straight line where the circulating holes (10) in the mandrel (4) are located is axially parallel to the mandrel (4); circulation hole (10) on urceolus (5) are a plurality of bar circulation holes, and a plurality of bar circulation holes evenly distributed is in urceolus (5) circumference to circulation hole (10) place straight line on urceolus (5) and urceolus (5) axial have the contained angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121092179.XU CN214997576U (en) | 2021-05-21 | 2021-05-21 | RD type toe end sliding sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121092179.XU CN214997576U (en) | 2021-05-21 | 2021-05-21 | RD type toe end sliding sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214997576U true CN214997576U (en) | 2021-12-03 |
Family
ID=79133087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121092179.XU Active CN214997576U (en) | 2021-05-21 | 2021-05-21 | RD type toe end sliding sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214997576U (en) |
-
2021
- 2021-05-21 CN CN202121092179.XU patent/CN214997576U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109869114B (en) | Packing type stage cementing device and operation method thereof | |
| US6966370B2 (en) | Apparatus for actuating an annular piston | |
| RU2543011C2 (en) | Ball seat for high pressure and high temperature | |
| EP1965020A1 (en) | Protective sleeve for expandable threaded connections | |
| US7823659B2 (en) | Apparatus and methods for drilling and lining a wellbore | |
| US20070012438A1 (en) | Arrangement of test plug | |
| EP0327405A1 (en) | Well cementing stage tool and method and device for alleviating a hydraulic lock | |
| CA2993296A1 (en) | Wellbore tool and method | |
| US20080142213A1 (en) | Radial expansion of a wellbore casing against a formation | |
| EP3219906A1 (en) | Hydraulic delay toe valve system and method | |
| US6062307A (en) | Screen assemblies and methods of securing screens | |
| EP3135855A1 (en) | Hydraulic delay toe valve system and method | |
| EP3584403A1 (en) | An annular barrier | |
| CA1315192C (en) | Gravel packing tool | |
| CN214997576U (en) | RD type toe end sliding sleeve | |
| CN109869113B (en) | Packing type stage cementing device | |
| CN217270122U (en) | Double-slip soluble bridge plug without mandrel | |
| CN214997575U (en) | HDTD type time delay sliding sleeve | |
| CN213775323U (en) | Pressure testing time-delay toe end valve | |
| US4582349A (en) | Plastically deformed seals in downhole tools | |
| CN112780227A (en) | Infinite-stage well cementation sliding sleeve for preventing cement solidification and assembling and operating method thereof | |
| RU156735U1 (en) | PACKER HYDRAULIC MECHANICAL | |
| CN114809976B (en) | Soluble packer and multistage sliding sleeve fracturing string | |
| CN112443289B (en) | Packing type stage cementing device | |
| US20230026272A1 (en) | Energy Retaining Toe Valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |