CN211081793U - Rotary injection device for well cementation - Google Patents
Rotary injection device for well cementation Download PDFInfo
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- CN211081793U CN211081793U CN201921791365.5U CN201921791365U CN211081793U CN 211081793 U CN211081793 U CN 211081793U CN 201921791365 U CN201921791365 U CN 201921791365U CN 211081793 U CN211081793 U CN 211081793U
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Abstract
The utility model provides a well cementation is with rotatory injection device, include: the cement head is symmetrically provided with at least two cement inlets and a conveying channel communicated with the cement inlets, and the outer surface of the cement head is provided with an extending part perpendicular to the conveying channel; a rotating body having an open installation space between the body and the extension; the sealing structure is arranged in the mounting space; and the bearing structure is arranged in the installation space and is positioned at one side of the conveying channel, which deviates from the sealing structure, one side of the bearing structure is connected with the cementing head, and the opposite side of the bearing structure is connected with the body, wherein the sealing structure and the bearing structure respectively use the conveying channel as central symmetry to be provided with at least two parts. The application provides a well cementation is with rotatory injection device has solved among the prior art rotatory injection mechanism and cement head dismouting inconvenient and the easy technical problem who loses of spare part.
Description
Technical Field
The utility model relates to a well cementation equipment field especially relates to a well cementation is with rotatory injection device.
Background
As the well drilling technology develops from shallow wells, medium-deep wells to deep wells and ultra-deep wells, the well cementing operation environment is more and more complex, the length of a well cementing pipe string is more and more long, and the tail pipe well cementing technology is widely applied. However, the conventional liner cementing has the problems that the annular space is small, the liner is difficult to put in, and filter cakes remain on the well wall, so that the cement cementation quality is influenced, and meanwhile, the displacement efficiency is influenced by the irregular well hole and the eccentricity of a sleeve, annular channeling is easy to form and the like.
In order to solve the above problems, a rotary tail pipe cementing technology has been studied and developed, the tail pipe is rotated during cementing to improve the displacement efficiency, and the tail pipe can be smoothly lowered to a predetermined position by drilling the rotary tail pipe during lower discharge and blockage.
The rotary injection mechanism is matched with a cementing head for use during well cementation, and realizes the rotary tail pipe cementing operation. Due to the complex performance of working media, high working pressure and the requirement of HSE (health, safety and environmental management system), the existing rotary injection mechanism generally has the problems of difficult installation and disassembly and easy loss of service life of a sealing element and a bearing.
The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a well cementation is with rotatory injection device aims at solving the technical problem that current rotatory injection mechanism and cementing head dismouting are inconvenient and spare part is easy to be lost.
In order to achieve the above object, the present application provides a rotary injection device for well cementation, comprising:
the cement head is symmetrically provided with at least two cement inlets and a conveying channel communicated with the cement inlets, and the outer surface of the cement head is provided with an extending part perpendicular to the conveying channel;
the rotary body is arranged on one side, facing the well, of the cementing head, the body is provided with a feeding channel communicated with the conveying channel, and an open installation space is formed between the body and the extension part;
the sealing structure is arranged in the mounting space, one side of the sealing structure is connected with the cementing head, and the opposite side of the sealing structure is abutted against the body; and the number of the first and second groups,
the bearing structure is arranged in the installation space and located, the sealing structure deviates from one side of the conveying channel, one side of the bearing structure is connected with the cement head, one side of the bearing structure is opposite to the cement head, and the body is connected with the sealing structure.
Optionally, one side of the body facing the cementing head is provided with multiple steps, the multiple steps decrease gradually from the middle to the edge of the body, the sealing structure is arranged at the highest first level of the multiple steps, the bearing structure is arranged at the second highest first level of the multiple steps, the side of the bearing structure facing the conveying passage is a first side, the connecting surface of the highest level and the second highest level of the multiple steps is a second side, and the first side is abutted to the second side.
Optionally, the sealing structure comprises:
the sealing box is arranged at the highest stage of the multistage steps, one side of the sealing box is provided with an opening, the other side of the sealing box is connected with the cement head key, and the opening faces the body;
the combined sealing element is arranged in the sealing box, one end of the combined sealing element is connected with the bottom of the opening, and the opposite end of the combined sealing element is connected with the body; and the number of the first and second groups,
and the sealing ring is arranged on the side surface of the sealing box facing the cementing head.
Optionally, the sealing ring is an O-ring.
Optionally, the sealing box is in clearance connection with the body.
Optionally, the bearing structure comprises:
the bearing is arranged at the secondary high level of the multistage step, one end of the bearing is connected with the cementing head, the opposite end of the bearing is connected with the body, and the first side surface is one side of the bearing, which faces the conveying channel;
one side of the retainer ring is abutted with the sealing structure, and the opposite side of the retainer ring is abutted with the bearing; and the number of the first and second groups,
the thrust ring is arranged on one side, away from the conveying passage, of the bearing and abutted against the bearing, one end of the thrust ring is embedded into the body, and the other end of the thrust ring protrudes out of the body.
Optionally, the bearing structure further comprises:
the end cover is arranged on one side, deviating from the conveying channel, of the bearing, one end of the end cover is connected with the extending part, the other end of the end cover is abutted to the body, a protruding part is arranged on one side, facing the bearing, of the end cover, the protruding part is located on one side, facing the cement head, of the thrust collar, and the protruding part is abutted to the bearing.
Optionally, a dust ring is arranged at the joint of the end cover and the body.
Optionally, the end cap is bolted to the cement head.
Optionally, one side of the body, which faces away from the cementing head, is in threaded connection with a tail pipe.
Compared with the prior art, the utility model provides an among the technical scheme, through with on the cementing head transfer passage is the center transfer passage's bilateral symmetry installation seal structure and bearing arrangement have simplified the body with dismouting between the cementing head, simultaneously, through the seal structure of symmetry setting and the bearing arrangement of symmetry setting, improved the life of sealed effect and bearing.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a first schematic structural view of an embodiment of a rotary cementing injection device according to the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the rotary well cementing injection device of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
101 | Conveying |
| 102 | |
2 | |
| 3 | |
301 | |
| 302 | Combined sealing element | 303 | O- |
| 4 | |
401 | |
| 402 | |
403 | |
| 404 | |
5 | Dust ring |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, technical solutions between the various embodiments of the present application may be combined with each other, but it must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not within the protection scope of the present application.
As shown in FIG. 1, the embodiment of the present invention provides a rotary injection device for well cementation, which includes:
the cement head 1 is symmetrically provided with at least two cement inlets and a conveying channel 101 communicated with the cement inlets, and the outer surface of the cement head 1 is provided with an extending part 102 vertical to the conveying channel 101;
the rotary body 2 is arranged on one side of the cementing head 1 facing a well, the body 2 is provided with a feeding channel communicated with the conveying channel 101, and an open installation space is formed between the body 2 and the extension part 102;
the sealing structure 3 is arranged in the installation space, one side of the sealing structure 3 is connected with the cementing head 1, and the opposite side of the sealing structure is abutted against the body 2; and the number of the first and second groups,
In the technical scheme that this embodiment adopted, through using transfer passage 101 on the cementing head 1 as the center, at the bilateral symmetry installation seal structure and the bearing arrangement of transfer passage 101, simplified the dismouting between body 2 and the cementing head 1, simultaneously, through the seal structure 3 and the bearing arrangement 4 of symmetry setting that the symmetry set up, improved the life of sealed effect and bearing.
Specifically, cementing head 1 is the cylinder, the middle part of cylinder is equipped with transfer passage 101, the lateral surface of cylinder is equipped with two at least cement imports, two cement imports set up on transfer passage 101's two relative lateral walls, the cement import communicates with transfer passage 101, form the feeding space of a cement, and simultaneously, the cylinder is close to the one end of body 2 and is equipped with two extensions 102, extension 102 perpendicular to cylinder just extends to the direction of keeping away from the cylinder, open installation space has between body 2 and the extension 102, it can be understood that extension 102 is not the tip that sets up the cylinder and be close to body 2 one end. Preferably, the cylinder is perpendicular to the body 2 and the delivery channel 101 is perpendicular to the body 2. One end and the body 2 butt of cementing head 1, the joint end of cementing head 1 and body 2 has a sunken mounting groove, and body 2 is equipped with a convex installation department towards one side of cementing head 1, and in the mounting groove was arranged in to the installation department, evenly was equipped with a plurality of filling holes along the axial of installation department, and the filling hole is used for connecting transfer passage 101 and feedstock channel. Seal structure 3 uses transfer passage 101 to be equipped with a plurality ofly as central symmetry, a plurality of seal structure 3 symmetries set up the different sides at transfer passage 101 for realize the leakproofness that cementing head 1 and body 2 are connected, simultaneously, bearing structure 4 uses transfer passage 101 to be equipped with a plurality ofly as the center also symmetry, a plurality of bearing structure 4 symmetries set up the different sides at transfer passage 101, when can guaranteeing body 2 rotation, the homogeneity of atress prevents that the bearing from damaging because of the atress is inhomogeneous.
Further, body 2 has multistage step towards one side of cementing head 1, and multistage step is decreased progressively to the edge by the middle part of body 2, and seal structure 3 sets up at the highest primary level of multistage step, and bearing structure 4 sets up at the second highest primary level of multistage step, and the side of bearing structure 4 orientation transfer passage 101 is first side, and the highest level of multistage step is connected the face with the second highest level and is the second side, and first side and second side butt.
In the technical scheme adopted by the embodiment, in order to reduce the use of materials and not influence the matching of the cementing head 1 and the body 2, the side of the body 2 facing the cementing head 1 is arranged into multiple stages, that is, the side of the body 2 facing the cementing head 1 is stepped, and the side is gradually decreased from the middle part to the edge. Meanwhile, the bearing structure 4 is arranged at the next highest of the multistage steps, and the position of the bearing structure 4 can be limited by using the connecting surface, i.e., the second side surface, of the highest stage and the next highest stage of the multistage steps. It should be noted that the highest level of the multi-level step is a level close to the center of the body 2, and the second highest level of the multi-level step is a level which is away from the center of the body 2 and is directly connected with the highest level.
Further, the seal structure 3 includes:
the sealing box 301 is arranged at the highest stage of the multistage steps, one side of the sealing box 301 is provided with an opening, the other side of the sealing box is connected with the cement head 1 in a key mode, and the opening faces the body 2;
a combined sealing element 302 which is arranged in the sealing box 301, one end of the combined sealing element 302 is connected with the bottom of the opening, and the opposite end is connected with the body 2; and the number of the first and second groups,
and a packing 303 provided on a side surface of the packing box 301 facing the cementing head 1.
In the technical solution adopted in this embodiment, in order to improve the sealing effect between the cementing head 1 and the body 2, a sealing structure 3 composed of a sealing box 301, a combined sealing member 302 and a sealing ring 303 is provided. The sealing box 301 is arranged on one side of the cementing head 1 facing the body 2, and the circumferential rotation of the sealing box 301 is limited through key connection, so that the sealing performance is improved. It will be appreciated that the seal cartridge 301 is a housing having an opening facing the body 2, the interior space of the housing being used to mount the composite seal 302. The composite seal 302 is a seal composed of two or more elements, and its sealing is more reliable. One end of the composite sealing member 302 is in close contact with the body 2, and the other end is connected to the sealing case 301. The sealing ring 303 is arranged at the joint of the sealing box 301 and the cementing head 1, so that the sealing effect can be further improved. When the sealing box 301 and the sealing ring 303 are required to rotate relative to the cementing head 1, only the combined sealing element 302 rotates relative to the cementing head 1, and the sealing effect is ensured.
Further, the sealing ring 303 is an O-ring.
In the technical solution adopted in this embodiment, the O-ring (O-rings) is a rubber seal ring with a circular cross section, and is called an O-ring because the cross section is O-ring. The O-shaped ring is low in price, simple to manufacture, reliable in function and simple in installation requirement, can meet the sealing requirement, and can reduce the use cost.
Further, the sealing box 301 is gap-connected to the body 2.
In the technical solution adopted in this embodiment, in order to ensure the sealing effect of the combined sealing member 302 and the body 2, the sealing box 301 and the body 2 are arranged in clearance connection. It can be understood that the sealing performance of the sealing box 301 is lower than that of the composite sealing member 302, and when the sealing box 301 abuts against the body 2, the composite sealing member 302 may not contact the body 2, thereby affecting the sealing effect of the composite sealing member 302 and the body 2. Therefore, by providing the seal box 301 in clearance connection with the body 2, it is possible to ensure sufficient contact between the composite seal member 302 and the body 2, thereby ensuring the sealing effect between the composite seal member 302 and the body 2.
Further, the bearing structure 4 includes:
the bearing 401 is arranged at the secondary high level of the multi-level steps, one end of the bearing 401 is connected with the cementing head 1, the opposite end of the bearing 401 is connected with the body 2, and the first side face is one side of the bearing 401 facing the conveying channel 101;
a retainer 402, one side of which abuts against the seal structure 3 and the opposite side of which abuts against the bearing 401; and the number of the first and second groups,
the thrust ring 403 is disposed on a side of the bearing 401 away from the conveying passage 101 and abuts against the bearing 401, one end of the thrust ring 403 is embedded in the body 2, and the other end protrudes out of the body 2.
In the technical solution adopted in this embodiment, in order not to affect the rotation of the body 2, a plurality of bearings 401 are provided, the plurality of bearings 401 are symmetrically provided, and the plurality of bearings 401 are located on different sides of the conveying channel 101. The side of the bearing 401 facing the conveyance path 101 is a first side surface, and the position of the bearing 401 can be defined in one direction by abutting the first side surface with a second side surface of the multistage step. Meanwhile, the position of the bearing 401 is further limited from other directions by the arranged retaining ring 402 and the thrust collar 403, and accidental abrasion caused by displacement is prevented.
Further, the bearing structure 4 further includes:
and the end cover 404 is arranged on one side of the bearing 401, which is far away from the conveying channel 101, one end of the end cover 404 is connected with the extension part 102, the other end of the end cover 404 is abutted against the body 2, one side of the end cover 404, which faces the bearing 401, is provided with a protruding part, the protruding part is positioned on one side of the thrust collar 403, which faces the cementing head 1, and the protruding part is abutted against the bearing 401.
In the solution adopted in this embodiment, in order to further define the position of the bearing 401, an end cover 404 is provided, and a side surface of the bearing 401 is abutted by the provided protrusion. The position of the bearing 401 is defined by the retainer ring 402, the second side surface, the thrust collar 403, and the end cap 404 in four directions, i.e., up, down, right, and left directions of the bearing 401.
Further, a dust ring 5 is arranged at the joint of the end cover 404 and the body 2.
In the technical solution adopted in this embodiment, in order to prevent external dust from entering and affecting the operating state of the bearing 401, the dust ring 5 is provided at the joint of the end cover 404 and the body 2, so that external dust and the like can be effectively prevented from entering the installation space.
Further, the end cap 404 is bolted to the cementing head 1.
In the technical scheme adopted by the embodiment, the end cover 404 can be conveniently mounted on the cementing head 1 by using bolt connection, preferably, a threaded hole is formed in one end of the end cover 404, which is away from the body 2, and the extension part 102 of the cementing head 1, the bolt is in threaded connection with the threaded hole, and the bolt is parallel to the body 2.
Further, one side of the body 2, which is far away from the cementing head 1, is in threaded connection with a tail pipe.
In the technical scheme adopted by the embodiment, the tail pipe is used for conveying cement to a gap between the well cementation pipe string and the drilling inner wall, and the tail pipe is in threaded connection with the body 2, so that the tail pipe is convenient to assemble and disassemble.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the technical solutions that can be directly or indirectly applied to other related fields without departing from the spirit of the present application are intended to be included in the scope of the present application.
Claims (10)
1. A rotary injection device for well cementing, comprising:
the cement head is symmetrically provided with at least two cement inlets and a conveying channel communicated with the cement inlets, and the outer surface of the cement head is provided with an extending part perpendicular to the conveying channel;
the rotary body is arranged on one side, facing the well, of the cementing head, the body is provided with a feeding channel communicated with the conveying channel, and an open installation space is formed between the body and the extension part;
the sealing structure is arranged in the mounting space, one side of the sealing structure is connected with the cementing head, and the opposite side of the sealing structure is abutted against the body; and the number of the first and second groups,
the bearing structure is arranged in the installation space and located, the sealing structure deviates from one side of the conveying channel, one side of the bearing structure is connected with the cement head, one side of the bearing structure is opposite to the cement head, and the body is connected with the sealing structure.
2. The rotary injector for well cementation according to claim 1, wherein the body has a plurality of steps on a side facing the cementing head, the plurality of steps decrease from the middle to the edge of the body, the sealing structure is arranged at the highest level of the plurality of steps, the bearing structure is arranged at the next highest level of the plurality of steps, the side of the bearing structure facing the conveying passage is a first side, the connection surface between the highest level and the next highest level of the plurality of steps is a second side, and the first side abuts against the second side.
3. The rotary injector for cementing according to claim 2, wherein said sealing structure comprises:
the sealing box is arranged at the highest stage of the multistage steps, one side of the sealing box is provided with an opening, the other side of the sealing box is connected with the cement head key, and the opening faces the body;
the combined sealing element is arranged in the sealing box, one end of the combined sealing element is connected with the bottom of the opening, and the opposite end of the combined sealing element is connected with the body; and the number of the first and second groups,
and the sealing ring is arranged on the side surface of the sealing box facing the cementing head.
4. The rotary injector for cementing according to claim 3, wherein said seal ring is an O-ring.
5. The rotary injector for cementing according to claim 3, wherein the seal box is gap-connected to the body.
6. A rotary injector for cementing according to claim 2 or 3, characterized in that the bearing structure comprises:
the bearing is arranged at the secondary high level of the multistage step, one end of the bearing is connected with the cementing head, the opposite end of the bearing is connected with the body, and the first side surface is one side of the bearing, which faces the conveying channel;
one side of the retainer ring is abutted with the sealing structure, and the opposite side of the retainer ring is abutted with the bearing; and the number of the first and second groups,
the thrust ring is arranged on one side, away from the conveying passage, of the bearing and abutted against the bearing, one end of the thrust ring is embedded into the body, and the other end of the thrust ring protrudes out of the body.
7. The rotary injector for cementing of claim 6, wherein the bearing structure further comprises:
the end cover is arranged on one side, deviating from the conveying channel, of the bearing, one end of the end cover is connected with the extending part, the other end of the end cover is abutted to the body, a protruding part is arranged on one side, facing the bearing, of the end cover, the protruding part is located on one side, facing the cement head, of the thrust collar, and the protruding part is abutted to the bearing.
8. The rotary injector for well cementation according to claim 7, wherein a dust ring is provided at the connection of the end cap and the body.
9. The rotary injector for cementing of claim 8, wherein the end cap is bolted to the cement head.
10. The rotary injector for cementing of claim 1, wherein a side of the body facing away from the cement head is threadedly connected to a tailpipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921791365.5U CN211081793U (en) | 2019-10-23 | 2019-10-23 | Rotary injection device for well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921791365.5U CN211081793U (en) | 2019-10-23 | 2019-10-23 | Rotary injection device for well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211081793U true CN211081793U (en) | 2020-07-24 |
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ID=71641325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921791365.5U Active CN211081793U (en) | 2019-10-23 | 2019-10-23 | Rotary injection device for well cementation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211081793U (en) |
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2019
- 2019-10-23 CN CN201921791365.5U patent/CN211081793U/en active Active
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