Casing float collar for oil field well cementation construction
By designing a casing floating crane for oil field cementing construction, using the cooperation of the second spring and the moving plate, combined with the channels of the first and second fixed seats, the double seal of cement slurry is achieved, which solves the problem of poor sealing effect of the existing casing floating crane and significantly improves the cementing quality.
Patent Information
- Application Number
- CN202421677964.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The existing casing floating hoop is sealed in a single seal during the cementing construction stage, which causes solid particles in the cement slurry to easily get stuck in the sealing place, affecting the sealing effect, resulting in large amounts of cementing slurry reflow during the cementing stage, which in turn makes the cementing quality unqualified.
A casing floating clamp including a tube body and a sealing assembly is designed. The sealing assembly is compressed by the second spring and the movement of the moving plate, combined with the passage between the first and second fixed seats to realize the double seal of the cement slurry and improve the sealing effect.
Through the double sealing design, the sealing effect of the pipe body is significantly improved, the cement slurry is prevented from flowing back, and the cementing quality is improved.
Smart Images
Figure CN222909952U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cementing construction, in particular to a casing float collar for oilfield cementing construction. Background Art
[0002] During traditional cementing construction, the operation of lowering a casing into a well and injecting cement into the annular space between the wellbore and the casing is an important and indispensable link in the drilling and completion operation process, and the casing float collar is an essential component in cementing construction.
[0003] The existing casing float collar is a commonly used equipment component in cementing construction and plays an important role in liner cementing. After cementing is completed, it bears the reverse bottom-hole pressure, prevents the backflow of cement slurry during the cement injection process, and realizes pressure release and waiting for setting after cementing collision pressure, which helps to improve the bonding quality between the cement sheath and the casing. The existing casing float collar mainly uses the elastic force of a spring to provide the sealing power when opening, and the sealing method is that the valve ball or valve core moves longitudinally under the action of the elastic force of the spring to realize opening and sealing.
[0004] However, when the existing casing float collar is used in the cementing construction stage, since the casing float collar has only a single sealing place for sealing, solid particles in the injected cement slurry are likely to get stuck in the sealing place, thus affecting the sealing effect, and further causing a large amount of backflow of the cement slurry during the waiting-for-setting stage, resulting in unqualified cementing quality. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a casing float collar for oilfield cementing construction, aiming at solving the problem that when the existing casing float collar is used in the cementing construction stage, since the casing float collar has only a single sealing place for sealing, solid particles in the injected cement slurry are likely to get stuck in the sealing place, thus affecting the sealing effect, and further causing a large amount of backflow of the cement slurry during the waiting-for-setting stage, resulting in unqualified cementing quality.
[0006] To achieve the above purpose, the utility model provides a casing float collar for oilfield cementing construction, including a pipe body,
[0007] It further includes a sealing assembly,
[0008] The sealing assembly includes a connecting frame, a first fixed seat, a first spring, a moving ring, a second fixed seat, a support frame, a support plate, a second spring and a moving plate. The connecting frame is fixedly connected to the pipe body and is located on one side of the pipe body. The first fixed seat is fixedly connected to the connecting frame and is located on one side of the connecting frame. The first spring is fixedly connected to the first fixed seat and is located on one side of the first fixed seat. The moving ring is fixedly connected to the first spring and is located on one side of the first spring. The second fixed seat is fixedly connected to the pipe body and is located on one side of the pipe body. The support frame is fixedly connected to the second fixed seat and is located on one side of the second fixed seat. The support plate is fixedly connected to the support frame and is located on one side of the support frame. The second spring is fixedly connected to the support plate and is located on one side of the support plate. The moving plate is fixedly connected to the second spring and is located on the side of the second spring away from the support plate.
[0009] Wherein, the sealing assembly further includes a threaded frame and a rotating cover. The threaded frame is threadedly connected to the pipe body and is located on one side of the pipe body. The rotating cover is fixedly connected to the threaded frame and is located on one side of the threaded frame.
[0010] Wherein, the sealing assembly further includes a rubber pad. The rubber pad is fixedly connected to the pipe body and is located on the side of the pipe body close to the threaded frame.
[0011] Wherein, the sealing assembly further includes a fixing member. The fixing member includes a first fixing ring and a second fixing ring. The first fixing ring is respectively fixedly connected to the support plate and the second spring. The first fixing ring is located on the side of the support plate close to the second spring. The second fixing ring is respectively fixedly connected to the moving plate and the second spring. The second fixing ring is located on the side of the moving plate close to the second spring.
[0012] Wherein, the fixing member further includes a third fixing ring. The third fixing ring is respectively fixedly connected to the first fixed seat and the first spring. The third fixing ring is located on the side of the first fixed seat close to the first spring.
[0013] A casing float collar for oilfield cementing construction of the present utility model enables the cement slurry in the casing connected above the pipe body to compress the second spring and drive the moving plate to move downward under the pressure after the lower rubber plug, allowing the cement slurry to flow into the second fixed seat and through the channel communicated between the first fixed seat and the second fixed seat into the second fixed seat. Under the pressure of the flowing-in cement slurry, the first spring can be stretched to drive the moving ring to move upward, enabling the cement slurry to flow out through both sides of the pipe body. After the pressure is stopped, the moving ring and the moving plate rebound and reset under the elastic force of the first spring and the second spring to block the corresponding flow ports, thereby achieving a double-sealing effect, improving the sealing effect of the pipe body, and ensuring the cementing quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.
[0015] Figure 1 It is a schematic structural diagram of a casing float collar for oilfield cementing construction according to the first embodiment of the present utility model.
[0016] Figure 2 It is a schematic structural diagram of the sealing assembly according to the first embodiment of the present utility model.
[0017] Figure 3 It is a schematic structural diagram of a casing float collar for oilfield cementing construction according to the second embodiment of the present utility model.
[0018] In the figure: 101 - pipe body, 102 - connecting frame, 103 - first fixed seat, 104 - first spring, 105 - moving ring, 106 - second fixed seat, 107 - support frame, 108 - support plate, 109 - second spring, 110 - moving plate, 111 - threaded frame, 112 - rotating cover, 113 - rubber pad, 201 - first fixed ring, 202 - second fixed ring, 203 - third fixed ring. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following will describe in detail the embodiments of the present utility model. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.
[0020] The first embodiment of the present application is as follows:
[0021] Please refer to Figure 1 and Figure 2 wherein Figure 1It is a schematic structural view of a casing float collar for oilfield cementing construction in the first embodiment of the present utility model. Figure 2 It is a schematic structural view of the sealing assembly in the first embodiment of the present utility model.
[0022] The present utility model provides a casing float collar for oilfield cementing construction, which includes a pipe body 101 and a sealing assembly. The sealing assembly includes a connecting frame 102, a first fixing seat 103, a first spring 104, a moving ring 105, a second fixing seat 106, a support frame 107, a support plate 108, a second spring 109, a moving plate 110, a threaded frame 111, a rotating cover 112 and a rubber pad 113. Through the foregoing solution, when the existing casing float collar is used in the cementing construction stage, since there is only a single sealing point for the casing float collar to seal, solid particles in the injected cement slurry are likely to get stuck at the sealing point, thereby affecting the sealing effect, and further causing a large amount of cement slurry to flow back during the waiting-for-setting stage, resulting in unqualified cementing quality. It can be understood that the foregoing solution can be used in the case where the casing can be double-sealed.
[0023] In this embodiment, during the process of running the casing, the one-way flow of the annulus drilling fluid is realized through the pipe body 101, preventing the backflow of the cement slurry during the cement injection process and realizing pressure release and waiting for setting after the cementing pressure bump, which helps to improve the bonding quality between the cement sheath and the casing.
[0024] Among them, the connecting frame 102 is fixedly connected to the pipe body 101 and is located on one side of the pipe body 101. The first fixing seat 103 is fixedly connected to the connecting frame 102 and is located on one side of the connecting frame 102. The first spring 104 is fixedly connected to the first fixing seat 103 and is located on one side of the first fixing seat 103. The moving ring 105 is fixedly connected to the first spring 104 and is located on one side of the first spring 104. The second fixing seat 106 is fixedly connected to the pipe body 101 and is located on one side of the pipe body 101. The support frame 107 is fixedly connected to the second fixing seat 106 and is located on one side of the second fixing seat 106. The support plate 108 is fixedly connected to the support frame 107 and is located on one side of the support frame 107. The second spring 109 is fixedly connected to the support plate 108 and is located on one side of the support plate 108. The moving plate 110 is fixedly connected to the second spring 109 and is located on the side of the second spring 109 away from the support plate 108. There are three connecting frames 102, and the three connecting frames 102 are welded inside the pipe body 101. The first fixing seat 103 is welded on the three connecting frames 102, and the connection and support of the first fixing seat 103 are realized through the connecting frame 102. The first fixing seat 103 has a cavity inside, and the first fixing seat 103 is communicated with the outlet of the pipe body 101. The first spring 104 is welded inside the cavity of the first fixing seat 103. The moving ring 105 is welded on the first spring 104. The moving ring 105 is located at the communication port between the first fixing seat 103 and the pipe body 101. The second fixing seat 106 is welded on the pipe body 101. There are three support frames 107, and the three support frames 107 are welded on the second fixing seat 106. The support plate 108 is welded on the three support frames 107. The support plate 108 can be connected and fixed inside the second fixing seat 106 through the support frame 107. The second fixing seat 106 is communicated with the first fixing seat 103, and the second fixing seat 106 is communicated with the pipe body 101. The second spring 109 is welded on the support plate 108. The moving plate 110 is welded on the second spring 109. The moving plate 110 can be connected and fixed on the support plate 108 through the second spring 109. At the same time, the deformation of the second spring 109 can drive the moving plate 110 to move. The moving plate 110 is located at the communication port where the second fixing seat 106 and the pipe body 101 are communicated. Thus, under the pressure of the cement slurry in the casing connected above the pipe body 101 after the lower rubber plug, the second spring 109 is compressed and drives the moving plate 110 to move downward, so that the cement slurry flows into the second fixing seat 106.And it flows into the second fixing seat 106 through the channel communicated with the first fixing seat 103 and the second fixing seat 106. Under the pressure of the flowing-in cement slurry, the first spring 104 can be stretched to drive the moving ring 105 to move upward, so that the cement slurry flows out through both sides of the pipe body 101. After the pressure application stops, the moving ring 105 and the moving plate 110 rebound and reset under the elastic force of the first spring 104 and the second spring 109 to block the corresponding circulation ports, thus achieving the double-sealing effect, further improving the sealing effect of the pipe body 101, and ensuring the cementing quality.
[0025] Secondly, the threaded frame 111 is threadedly connected to the pipe body 101 and is located on one side of the pipe body 101; the rotating cover 112 is fixedly connected to the threaded frame 111 and is located on one side of the threaded frame 111. The threaded frame 111 is threadedly connected to the pipe body 101, and the rotating cover 112 is welded to the threaded frame 111. By twisting the rotating cover 112, the threaded frame 111 can be threadedly connected to the pipe body 101. Furthermore, through the threaded connection between the threaded frame 111 and the pipe body 101, the sealing performance of the pipe body 101 is better improved.
[0026] Finally, the rubber pad 113 is fixedly connected to the pipe body 101 and is located on one side of the pipe body 101 close to the threaded frame 111. The rubber pad 113 is bonded to the pipe body 101 and is between the pipe body 101 and the threaded frame 111. Through the rubber pad 113, the sealing performance of the connection between the pipe body 101 and the threaded frame 111 can be better improved.
[0027] When using a casing float collar for oilfield cementing construction in this embodiment, under the pressure of the cement slurry in the casing connected above the pipe body 101 after the lower rubber plug, the second spring 109 is compressed to drive the moving plate 110 to move downward, so that the cement slurry flows into the second fixing seat 106 and flows into the second fixing seat 106 through the channel communicated with the first fixing seat 103 and the second fixing seat 106. Under the pressure of the flowing-in cement slurry, the first spring 104 can be stretched to drive the moving ring 105 to move upward, so that the cement slurry flows out through both sides of the pipe body 101. After the pressure application stops, the moving ring 105 and the moving plate 110 rebound and reset under the elastic force of the first spring 104 and the second spring 109 to block the corresponding circulation ports, thus achieving the double-sealing effect, further improving the sealing effect of the pipe body 101, and ensuring the cementing quality.
[0028] The second embodiment of this application is:
[0029] Based on the first embodiment, please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a casing float collar for oilfield cementing construction according to the second embodiment of the present utility model.
[0030] The present utility model provides a casing float collar for oilfield cementing construction, which further includes a fixing member. The fixing member includes a first fixing ring 201, a second fixing ring 202, and a third fixing ring 203.
[0031] The first fixing ring 201 is fixedly connected to the support plate 108 and the second spring 109 respectively. The first fixing ring 201 is located on the side of the support plate 108 close to the second spring 109. The second fixing ring 202 is fixedly connected to the moving plate 110 and the second spring 109 respectively. The second fixing ring 202 is located on the side of the moving plate 110 close to the second spring 109. The first fixing ring 201 is welded to one end of the support plate 108 and the second spring 109. Through the first fixing ring 201, one end of the second spring 109 can be more stably connected and fixed to the support plate 108. The second fixing ring 202 is welded to the moving plate 110 and the other end of the second spring 109. Through the second fixing ring 202, the other end of the first spring 104 can be more stably connected and fixed to the moving plate 110.
[0032] The third fixing ring 203 is fixedly connected to the first fixing seat 103 and the first spring 104 respectively. The third fixing ring 203 is located on the side of the first fixing seat 103 close to the first spring 104. The third fixing ring 203 is welded to one end of the first fixing seat 103 and the first spring 104. Through the third fixing ring 203, one end of the first spring 104 can be more stably connected and fixed to the first fixing seat 103.
[0033] The above-disclosed are only one or more preferred embodiments of the present application, and the scope of rights of the present application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.
Claims
1. A casing float collar for oilfield cementing construction, comprising a pipe body, characterized in that: Also includes a sealing assembly, The sealing assembly includes a connecting frame, a first fixed seat, a first spring, a movable ring, a second fixed seat, a supporting frame, a supporting plate, a second spring and a movable plate. The connecting frame is fixedly connected to the tube body and is located on one side of the tube body. The first fixed seat is fixedly connected to the connecting frame and is located on one side of the connecting frame. The first spring is fixedly connected to the first fixed seat and is located on one side of the first fixed seat. The movable ring is fixedly connected to the first spring and is located on one side of the first spring. The second fixed seat is fixedly connected to the tube body and is located on one side of the tube body. The supporting frame is fixedly connected to the second fixed seat and is located on one side of the second fixed seat. The supporting plate is fixedly connected to the supporting frame and is located on one side of the supporting frame. The second spring is fixedly connected to the supporting plate and is located on one side of the support plate. The movable plate is fixedly connected to the second spring and is located on a side of the second spring away from the support plate.
2. The casing float collar for oilfield cementing construction according to claim 1, characterized in that: The sealing assembly also includes a threaded frame and a rotating cover. The threaded frame is threadedly connected to the tube body and is located on one side of the tube body; the rotating cover is fixedly connected to the threaded frame and is located on one side of the threaded frame.
3. The casing float collar for oilfield cementing construction according to claim 2, characterized in that: The sealing assembly also includes a rubber pad, which is fixedly connected to the tube body and is located on a side of the tube body close to the threaded frame.
4. The casing float collar for oilfield cementing construction according to claim 1, characterized in that: The sealing assembly also includes a fixing component, which includes a first fixing ring and a second fixing ring, the first fixing ring being fixedly connected to the support plate and the second spring respectively, and the first fixing ring being located on a side of the support plate close to the second spring; the second fixing ring being fixedly connected to the movable plate and the second spring respectively, and the second fixing ring being located on a side of the movable plate close to the second spring.
5. The casing float collar for oilfield cementing construction as claimed in claim 4, characterized in that: The fixing component further includes a third fixing ring, which is fixedly connected to the first fixing seat and the first spring respectively, and is located on a side of the first fixing seat close to the first spring.