CN216429555U - Horizontal well surface casing well cementation device - Google Patents
Horizontal well surface casing well cementation device Download PDFInfo
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- CN216429555U CN216429555U CN202122059553.2U CN202122059553U CN216429555U CN 216429555 U CN216429555 U CN 216429555U CN 202122059553 U CN202122059553 U CN 202122059553U CN 216429555 U CN216429555 U CN 216429555U
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Abstract
The utility model provides a horizontal well surface casing well cementation device which comprises a guide pipe, a surface casing hollow sealing flange head, a slurry return control valve, a cement injection slurry control valve, a displacement clear water control valve, a foam rubber column and a pipeline system. The surface sleeve well cementation device for the horizontal well can effectively improve the well cementation quality of the horizontal well, avoids cement residue in the surface sleeve from causing adverse effects on subsequent three-opening, and has remarkable economic benefit.
Description
Technical Field
The utility model relates to a surface casing well cementation device, in particular to a surface casing well cementation device used for a horizontal well in a coal mine tunnel.
Background
In the process of comprehensive treatment of coal mine gas, hydraulic fracturing of a coal bed by a horizontal well drilled on a coal rock bottom plate is an effective way for pre-pumping gas, in the process of cementing the coal bed gas horizontal well, because a shaft is basically in a horizontal state, injected cement slurry can flow out of the wellhead of the horizontal well and is not easy to fill a gap between a surface casing and the shaft, the cement slurry cannot be firmly filled in the gap between the surface casing and the shaft, in the fracturing process, pressure can possibly prolong the annular leakage of unqualified well cementation quality, even the casing is pushed out of the shaft, so that engineering construction accidents are caused, and great harm is caused to coal mine roadways and workers.
The overflowed cement slurry may flow into the surface casing from the port of the surface casing and hydrate or condense in the casing, once the cement slurry hydrates or deposits in the casing, the well cementation quality cannot be guaranteed, three openings are affected, and meanwhile, great risk may be brought to later-stage fracturing operation construction.
The problems of construction difficulty and incapability of guaranteeing well cementation quality are brought to well cementation construction due to the overflow of cement paste and the hydration or deposition of the cement paste in the sleeve.
Disclosure of Invention
The utility model aims to solve the problems of the prior art that: (1) the cement slurry of the coal bed horizontal fracturing well leaks out and cannot be filled into a gap between the surface casing and the shaft in a solid manner; (2) the overflowed cement slurry flows back into the surface casing pipe, and the like.
In order to solve the technical problem, the utility model provides a horizontal well surface casing well cementation device which is used for surface casing well cementation construction of a roadway coal bed gas horizontal well and comprises a guide pipe, a surface casing hollow sealing flange head, a slurry return control valve, a cement injection slurry control valve, a displacement clear water control valve, a foam rubber column and a pipeline system; when the surface casing of the horizontal well is used for cementing, the displacement clear water control valve is closed, the cement slurry injection control valve is opened, and the cement slurry return control valve is in a semi-closed state. When cement paste is injected into the well through the pump, the cement paste enters the meter sleeve through the cement paste injection valve, and after the cement paste reaches the sleeve shoes, the cement paste returns to the back-grouting control valve at the empty sealing flange of the meter sleeve along the annular space. In the actual well cementation operation, when the pump injects enough cement slurry required by annulus well cementation, the pump starts to inject clear water, the injection amount of the clear water pump is the volume amount from a cement slurry pump suction inlet to a pipeline of a horizontal well surface sleeve well cementation device, then a cement slurry injection control valve is closed, a displacement clear water control valve is opened, the same amount of slurry as the volume in the length of a surface sleeve is injected to displace clear water, at the moment, the pumped clear water pushes a foam rubber column to move forwards to push out cement slurry in the surface sleeve, and the foam rubber column isolates the cement slurry from the clear water, so that the problems of cement slurry deposition and hydration by the clear water in the horizontal well sleeve can be effectively prevented, and the problems that the quality requirement of well cementation cannot be met due to the residual cement and the hydrated cement slurry in the horizontal well cementation sleeve are solved. And when the displacement exceeds 80 percent of the total amount, closing the slurry return control valve, then extruding the displacement liquid by using a pump to finish the injection of the last 20 percent of cement slurry, closing the displacement clear water control valve until all the displacement liquid is injected by the pump, and at the moment, all three control valves of the well cementation device are in a closed state until the cement is solidified for 48 hours, and finishing the well cementation.
Wherein, a foam rubber column with the same inner diameter as the casing is arranged in the horizontal well surface casing cementing device.
The horizontal well meter sleeve well cementation device is provided with a cement injection slurry control valve, a displacement clear water control valve and a slurry return control valve.
The horizontal well meter sleeve well cementation device provided by the application has the advantages that when cement is injected, the cement injection control valve is opened, and the displacement clean water valve is closed.
The horizontal well surface sleeve well cementation device is characterized in that a grouting control valve is in a semi-closed state during well cementation, and is completely closed when the displacement fluid is pumped to 80% until the displacement fluid is squeezed and injected.
And when the clear water is replaced, closing the cement injection valve, when the replacement is finished, closing the clear water control valve, waiting for setting for 48 hours, and finishing the well cementation.
The horizontal well surface casing well cementation device provided by the utility model can effectively improve the well cementation quality of the horizontal well surface casing, avoids cement paste hydration and cement paste precipitation on the inner wall of the casing, and has remarkable economic benefit.
Drawings
The present invention will be better understood with reference to the accompanying drawings, which are schematic only and not to scale, and which show only those matters that are pertinent to understanding the present invention.
FIG. 1 is a specific structure diagram of the surface casing cementing device of the horizontal well of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, a preferred embodiment of the present invention provides a horizontal well surface casing cementing device, which is used for surface casing cementing construction of a coal bed gas horizontal well in a coal mine roadway, and comprises a cement injection slurry control valve (1), a cement slurry receiving pump interface (2), a displacement clear water control valve (3), a foam rubber column (4), and a casing male buckle (5), which are connected with a surface casing coupling (8); a pulp return control valve (6); the guide pipe and the meter sleeve are sleeved with a hollow sealing flange head (7); a watch case collar (8); and a mud return outlet (9) connected to the cement slurry tank. And the foam rubber column (4) is arranged in the surface sleeve well cementation device and is positioned between the inlet of the water injection mud pipe and the inlet of the displacement clear water pipe. When the surface casing of the horizontal well is used for cementing, the displacement clear water control valve (3) is closed, the cement slurry injection control valve (1) is opened, and the slurry return control valve (6) is in a semi-closed state. When cement paste is injected into the well through the pump, the cement paste enters the meter sleeve through the cement paste injection control valve (1), and the cement paste returns to the guide pipe and the slurry return control valve (6) of the meter sleeve hollow sealing flange head (7) along the annular space after reaching the sleeve shoes. In the actual well cementation operation, when the cement slurry required by sufficient annulus well cementation is pumped, the pump is started to inject clear water, the injection amount of a clear water pump is the volume amount from a slurry pump suction inlet to a pipeline of a horizontal well surface sleeve well cementation device, then a water injection slurry control valve (1) is closed, a displacement clear water control valve (3) is opened, displacement clear water with the same volume as the length of a surface sleeve is injected, the pumped clear water pushes a foam rubber column (4) to move forwards, so that the problems of cement slurry deposition in the horizontal well sleeve and hydration by the clear water can be effectively prevented, the problems that the well cementation quality requirement cannot be met due to the residual cement in the sleeve after the horizontal well cementation and the hydrated cement slurry are solved, and the like are solved, when the displacement amount exceeds 80% of the total amount, a slurry return control valve (6) is closed, until all displacement fluid is injected by the pump, the displacement clear water control valve (3) is closed, and all three control valves of the well cementation device are in a closed state, and (5) completing well cementation until the cement is solidified for 48 hours.
The horizontal well surface casing well cementation device can effectively improve the well cementation quality of the horizontal well surface casing, avoids cement paste hydration and cement paste deposition on the inner wall of the casing, and is remarkable in economic benefit.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Description of the reference numerals
1: a cement injection control valve;
2: a mud pump interface is connected;
3: replacing the clean water control valve;
4: a foam rubber column;
5: a sleeve male buckle;
6: a pulp return control valve;
7: the guide pipe and the meter sleeve are sleeved with a hollow sealing flange head;
8: a watch case collar;
9: and (6) a pulp return outlet.
Claims (3)
1. A horizontal well surface casing well cementation device is characterized in that: the well cementation device comprises a guide pipe, a meter sleeve hollow sealing flange head (7), a slurry return control valve (6), a cement injection slurry control valve (1), a displacement clear water control valve (3), a foam rubber column (4) and a pipeline system; the foam rubber column (4) can be pushed by switching the cement injection control valve (1) and the displacement clear water control valve (3), and the foam rubber column (4) is used for isolating cement paste and displacement clear water; by adjusting the opening of the slurry return control valve (6), the phenomenon that cement slurry flows along the lower annular space in the annular space due to a horizontal well can be avoided, and by closing the slurry return control valve (6), the cement slurry in a shaft can be squeezed and injected.
2. The horizontal well surface casing cementing device according to claim 1, which is characterized in that: the cementing device also comprises a return slurry outlet (9).
3. The horizontal well surface casing cementing device according to claim 1, which is characterized in that: the well cementation device also comprises a meter sleeve coupling (8) and a sleeve pin thread (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122059553.2U CN216429555U (en) | 2021-08-30 | 2021-08-30 | Horizontal well surface casing well cementation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122059553.2U CN216429555U (en) | 2021-08-30 | 2021-08-30 | Horizontal well surface casing well cementation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216429555U true CN216429555U (en) | 2022-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122059553.2U Active CN216429555U (en) | 2021-08-30 | 2021-08-30 | Horizontal well surface casing well cementation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216429555U (en) |
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2021
- 2021-08-30 CN CN202122059553.2U patent/CN216429555U/en active Active
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