Casing float collar device for petroleum well cementation

Abstract

The utility model relates to the technical field of oil exploitation, in particular to a casing float collar device for oil well cementation, which comprises a casing, a valve body and an adjusting component, the valve body is mounted in the casing, the adjusting component comprises a threaded sleeve, an adjusting cylinder, a flow hole, a fixing ring frame, a first sealing ring, a second sealing ring and a control component, the threaded sleeve is fixedly connected with the casing, and the adjusting cylinder is fixedly connected with the casing. The adjusting cylinder penetrates through the threaded sleeve and is in threaded connection with the threaded sleeve, the flow hole is formed in the adjusting cylinder, the fixing ring frame is fixedly connected with the shell and is located on the side, close to the adjusting cylinder, of the shell, the first sealing ring is installed on the adjusting cylinder and makes contact with the inner wall of the shell, and the second sealing ring is installed on the fixing ring frame and makes contact with the adjusting cylinder. The control component controls the adjusting cylinder to move, and the problems that due to the fact that different stratums have different distribution requirements for the cement paste, the prior art is not provided with a flow adjusting mechanism, and the cement paste flow cannot be flexibly adjusted according to the specific characteristics of the stratums are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil exploitation, in particular to a casing floating collar device for oil well cementing. Background Art

[0002] In oil well cementing operations, the casing float collar device plays a key role. It is mainly used to prevent drilling fluid from entering the casing during the process of lowering the casing string into the well, and to ensure that the cement slurry smoothly replaces the drilling fluid during cementing. The traditional casing float collar device has the following shortcomings: 1. At the connection between the float collar and the lower casing, the channel for liquid circulation becomes narrower. When the night flow passes through this position, the pressure at that position will increase. The personnel are unaware of the pressure at this position, which may cause the casing or float collar to rupture due to pressure. 2. When the spring works for a long time, it may cause the spring to be skewed, and thus the valve ball cannot perfectly block the choke valve. 3. The liquid in the oil well contains impurities. When it enters the area where the spring is located, the impurities may adhere to the spring gap, affecting the use of the spring.

[0003] Prior art CN210738519U discloses a casing float collar device for oil well cementing. The device comprises a housing, a choke valve disposed within the housing, a spring welded to the bottom of the choke valve, a valve ball welded to the top of the spring via a connecting rod, fixed polished rods disposed on both sides of the bottom of the choke valve, and a rubber pad glued to the contact area between the choke valve and the valve ball. A pressure sensor is embedded in one side of the top of the housing. This utility model, a casing float collar device for oil well cementing, features a simple structure and is easy to use, making it suitable for widespread promotion and use.

[0004] Regarding the above-mentioned casing floating collar device for oil well cementing, different formations have different requirements for cement slurry distribution, and the existing technology does not have a flow regulating mechanism, and cannot flexibly adjust the cement slurry flow according to the specific characteristics of the formation. Utility Model Content

[0005] The purpose of the utility model is to provide a casing floating collar device for oil well cementing, which solves the problem that different strata have different requirements for the distribution of cement slurry, and the existing technology does not have a flow regulating mechanism and cannot flexibly adjust the cement slurry flow according to the specific characteristics of the stratum.

[0006] To achieve the above-mentioned purpose, the utility model provides a casing floating collar device for oil cementing, comprising a shell, a valve body and an adjusting assembly, the valve body being installed in the shell, the adjusting assembly comprising a threaded sleeve, an adjusting cylinder, a flow hole, a fixed ring frame, a first sealing ring, a second sealing ring and a control member, the threaded sleeve being fixedly connected to the shell and being located in the shell, the adjusting cylinder passing through the threaded sleeve and being threadedly connected to the threaded sleeve, the flow hole being opened on the adjusting cylinder, the fixed ring frame being fixedly connected to the shell and being located on a side of the shell close to the adjusting cylinder, the first sealing ring being installed on the adjusting cylinder and being in contact with the inner wall of the shell, the second sealing ring being installed on the fixed ring frame and being in contact with the adjusting cylinder, and the control member controlling the movement of the adjusting cylinder.

[0007] Wherein, the control component includes a rotating head and a rotating handle, the rotating head is fixedly connected to the adjusting cylinder and is located on one side of the adjusting cylinder; the rotating handle is fixedly connected to the rotating head and is located inside the rotating head.

[0008] Wherein, the adjustment assembly further includes a guide ring, which is fixedly connected to the shell and is located on a side of the shell close to the rotating head.

[0009] The adjusting tube has a first card slot, which is provided on the outer peripheral side of the adjusting tube; the fixing ring frame has a second card slot, which is provided on the inner wall of the fixing ring frame.

[0010] The casing floating collar device for oil well cementing further comprises a connecting thread, which is provided on the housing and located on a side of the housing close to the guide ring.

[0011] The utility model discloses a casing floating collar device for oil well cementing, comprising a housing, a valve body and an adjusting assembly, wherein the valve body is mounted in the housing, and the adjusting assembly comprises a threaded sleeve, an adjusting cylinder, a flow hole, a fixed ring frame, a first sealing ring, a second sealing ring and a control member, wherein the threaded sleeve is fixedly connected to the housing and is located in the housing, the adjusting cylinder passes through the threaded sleeve and is threadedly connected to the threaded sleeve, the flow hole is provided on the adjusting cylinder, the fixed ring frame is fixedly connected to the housing and is located on a side of the housing close to the adjusting cylinder, the first sealing ring is mounted on the adjusting cylinder and contacts the inner wall of the housing, the second sealing ring is mounted on the fixed ring frame and contacts the adjusting cylinder, and the control member controls the movement of the adjusting cylinder, thereby solving the problem that different strata have different requirements for the distribution of cement slurry, and the prior art does not have a flow regulating mechanism and cannot flexibly adjust the cement slurry flow according to the specific characteristics of the strata. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0013] Figure 1 The utility model is a schematic diagram of the overall structure of a casing floating collar device for oil well cementing.

[0014] Figure 2 It is a structural schematic diagram of the second sealing ring of the utility model.

[0015] Figure 3 It is a structural diagram of the control component of the utility model.

[0016] Figure 4 It is a structural schematic diagram of the adjusting cylinder and the fixing ring frame of the utility model.

[0017] In the figure: 101-housing, 102-valve body, 103-threaded sleeve, 104-adjusting cylinder, 105-flow hole, 106-fixed ring frame, 107-first sealing ring, 108-second sealing ring, 109-rotating head, 110-rotating handle, 111-guide ring, 112-first slot, 113-second slot, 114-connecting thread. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0019] The embodiments of the present application are:

[0020] See also Figures 1-4 , Figure 1 This is a schematic diagram of the overall structure of the casing floating collar device for oil well cementing of the utility model. Figure 2 This is a schematic structural diagram of the second sealing ring 108 of the present invention. Figure 3 This is a schematic diagram of the structure of the control component of the utility model. Figure 4 It is a structural schematic diagram of the adjustment cylinder 104 and the fixed ring frame 106 of the present invention.

[0021] The present invention's casing float collar device for oil well cementing includes a housing 101, a valve body 102, a threaded sleeve 103, an adjustment cylinder 104, a flow hole 105, a fixed ring frame 106, a first sealing ring 107, a second sealing ring 108, a rotating head 109, a rotating handle 110, a guide ring 111, a first clamping groove 112, a second clamping groove 113, and a connecting thread 114. This solves the problem that different formations have different requirements for cement slurry distribution, and the existing technology lacks a flow regulation mechanism, making it impossible to flexibly adjust the cement slurry flow rate according to the specific characteristics of the formation. It is understandable that the above solution can also be used to improve applicability.

[0022] In this embodiment, the valve body 102 is a prior art and is installed in the housing 101. The specific structure of the valve body 102 refers to the prior art CN210738519U, a casing floating collar device for oil cementing. The regulating assembly is installed in the housing 101, so that the flow rate of the cement slurry can be adjusted, which solves the problem that different formations have different distribution requirements for cement slurry, and the prior art does not have a flow regulating mechanism and cannot flexibly adjust the cement slurry flow rate according to the specific characteristics of the formation.

[0023] The threaded sleeve 103 is fixedly connected to the housing 101 and is located in the housing 101. The adjusting cylinder 104 passes through the threaded sleeve 103 and is threadedly connected to the threaded sleeve 103. The flow hole 105 is opened on the adjusting cylinder 104. The fixed ring frame 106 is fixedly connected to the housing 101 and is located on the side of the housing 101 close to the adjusting cylinder 104. The first sealing ring 107 is installed on the adjusting cylinder 104 and contacts the inner wall of the housing 101. The second sealing ring 108 is installed on the fixed ring frame 106. The adjusting cylinder 104 is mounted on the frame 106 and in contact with the adjusting cylinder 104. The control member controls the movement of the adjusting cylinder 104. The threaded sleeve 103 is annular and is mounted on the top inner wall of the housing 101. The inner wall of the threaded sleeve 103 is provided with an internal thread. The adjusting cylinder 104 is a hollow cylinder with an open top. The surface of the adjusting cylinder 104 is provided with an external thread. The connection between the adjusting cylinder 104 and the threaded sleeve 103 is achieved through the internal thread and the external thread. The number of the flow holes 105 is several and evenly arranged on the adjusting cylinder 1 04, cement slurry can pass through the regulating cylinder 104 through the flow hole 105, the fixed ring frame 106 is annular and is installed on the inner wall of the shell 101, the first sealing ring 107 and the second sealing ring 108 are both made of rubber material, the first sealing ring 107 is on the outside of the regulating cylinder 104, the first sealing ring 107 is in close contact with the inner wall of the shell 101, the second sealing ring 108 is embedded in the fixed ring frame 106, and the inner wall of the second sealing ring 108 is in close contact with the regulating cylinder 104. The control component can control the lifting and lowering of the regulating cylinder 104. The more the regulating cylinder 104 moves downward, the more the flow hole 105 is exposed, and the larger the flow area. The more the regulating cylinder 104 moves upward, the less the flow hole 105 is exposed, and the smaller the flow area. By controlling the lifting and lowering of the regulating cylinder 104, the size of the flow area is changed, and the control of the cement slurry flow is achieved, which solves the problem that different strata have different distribution requirements for cement slurry, and the existing technology does not have a flow regulating mechanism and cannot flexibly adjust the cement slurry flow according to the specific characteristics of the stratum.

[0024] Secondly, the rotating head 109 is fixedly connected to the adjusting cylinder 104 and is located on one side of the adjusting cylinder 104; the rotating handle 110 is fixedly connected to the rotating head 109 and is located inside the rotating head 109. The rotating head 109 is annular and is located at the top of the adjusting cylinder 104. The rotating handle 110 is a cylinder and is horizontally arranged inside the rotating head 109. By rotating the rotating handle 110, the rotating head 109 can drive the adjusting cylinder 104 to rotate, thereby controlling the lifting and lowering movement of the adjusting cylinder 104.

[0025] At the same time, the guide ring 111 is fixedly connected to the shell 101 and is located on the side of the shell 101 close to the rotating head 109. The guide ring 111 is circular and is located above the rotating head 109. Through the guide ring 111, it can play a role in diversion, so that the cement slurry can flow smoothly into the regulating cylinder 104.

[0026] In addition, the first clamping groove 112 is provided on the outer peripheral side of the adjusting cylinder 104; the second clamping groove 113 is provided on the inner wall of the fixing ring frame 106. The first clamping groove 112 is provided on the surface of the adjusting cylinder 104, and can clamp the first sealing ring 107 so that the first sealing ring 107 moves with the movement of the adjusting cylinder 104. The second clamping groove 113 is provided on the inner wall of the fixing ring frame 106, and can clamp the second sealing ring 108. Through the first clamping groove 112 and the second clamping groove 113, the positioning of the first sealing ring 107 and the second sealing ring 108 can be achieved.

[0027] Finally, the connecting thread 114 is provided on the shell 101 and is located on the side of the shell 101 close to the guide ring 111. The connecting thread 114 is provided on the inner top of the shell 101 for quick docking with the casing. By connecting with the casing through the connecting thread 114, the casing connection time can be greatly shortened and the cementing operation efficiency can be improved.

[0028] In this embodiment, in some highly permeable formations, it is necessary to quickly inject cement slurry to prevent drilling fluid from invading the formation, while in some formations prone to leakage, it is necessary to reduce the cement slurry flow rate to prevent large-scale cement slurry leakage. This application can adjust the cement slurry flow rate according to the specific characteristics of the formation and reasonably control the cement slurry injection rate. The operator can manually adjust the flow rate according to actual needs. When adjusting the flow rate, the operator holds the rotating handle 110 and rotates it. When the rotating handle 110 is rotated clockwise, the adjusting cylinder 104 moves downward, the more the flow hole 105 is exposed, the greater the flow rate of the cement slurry. When the rotating handle 110 is rotated counterclockwise, the adjusting cylinder 104 moves upward, the less the flow hole 105 is exposed, and the greater the flow rate of the cement slurry. After the operator adjusts the position of the adjusting cylinder 104, the shell 101 is connected to the bottom of the casing through the connecting thread 114. By rotating the rotating handle 110, the adjusting cylinder 104 is driven to move up and down, thereby changing the size of the flow area and realizing the control of the cement slurry flow rate. This solves the problem that different strata have different distribution requirements for cement slurry, and the existing technology does not have a flow regulating mechanism and cannot flexibly adjust the cement slurry flow rate according to the specific characteristics of the stratum.

[0029] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. A casing floating collar device for oil well cementing, comprising a housing and a valve body, wherein the valve body is installed in the housing, characterized in that: Also included are adjustment components; The adjusting assembly includes a threaded sleeve, an adjusting cylinder, a flow hole, a fixed ring frame, a first sealing ring, a second sealing ring and a control member. The threaded sleeve is fixedly connected to the housing and is located in the housing. The adjusting cylinder passes through the threaded sleeve and is threadedly connected to the threaded sleeve. The flow hole is opened on the adjusting cylinder. The fixed ring frame is fixedly connected to the housing and is located on a side of the housing close to the adjusting cylinder. The first sealing ring is installed on the adjusting cylinder and contacts the inner wall of the housing. The second sealing ring is installed on the fixed ring frame and contacts the adjusting cylinder. The control member controls the movement of the adjusting cylinder.

2. The casing floating collar device for oil well cementing according to claim 1, characterized in that: The control component includes a rotating head and a rotating handle. The rotating head is fixedly connected to the adjusting cylinder and is located on one side of the adjusting cylinder; the rotating handle is fixedly connected to the rotating head and is located inside the rotating head.

3. The casing floating collar device for oil well cementing according to claim 2, characterized in that: The adjustment assembly further includes a guide ring, which is fixedly connected to the shell and located on a side of the shell close to the rotating head.

4. The casing floating collar device for oil well cementing according to claim 1, characterized in that: The adjusting tube has a first clamping groove, which is opened on the outer peripheral side of the adjusting tube; the fixing ring frame has a second clamping groove, which is opened on the inner wall of the fixing ring frame.

5. The casing floating collar device for oil well cementing according to claim 3, characterized in that: The casing floating collar device for oil well cementing further comprises a connecting thread, which is provided on the housing and located on a side of the housing close to the guide ring.

Images