CN217712498U

CN217712498U - Balanced type hydraulic locking automatic grouting device

Info

Publication number: CN217712498U
Application number: CN202221618234.9U
Authority: CN
Inventors: 吴江; 吴斌; 生秋龙; 黄久德
Original assignee: Yancheng Chujiang Petroleum Machinery Manufacturing Co ltd
Current assignee: Yancheng Chujiang Petroleum Machinery Manufacturing Co ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2022-11-01
Anticipated expiration: 2032-06-27

Abstract

The utility model discloses an automatic cementer of balanced type hydraulic locking, including the device shell, it is provided with the valve body to slide on the device shell, be provided with adjustment mechanism on the device shell, adjustment mechanism includes fixed connection's tray on the device shell, it is provided with the valve head to slide on the tray, the valve head passes through the spring and the tray is connected, the one end and the valve body joint of valve head. The valve body and the valve head are mutually matched, on one hand, when the casing is put down, the hydraulic pressure in the well can enter the casing from the annular space outside the casing and then circularly shunted by the device to enter the casing, thereby avoiding that the pressure difference is formed inside and outside the casing at a high speed when the casing is put down, and the well fluid is gushed out to cause the damage of personnel and equipment; on the other hand, when the grouting is normally performed, the circulating shunt speed of grouting liquid of the device from the inside of the casing to the outside of the casing is controlled by using the grouting pressure of a wellhead, and meanwhile, the casing is prevented from being extruded and damaged by pressure difference.

Description

Balanced type hydraulic locking automatic grouting device

Technical Field

The utility model relates to an oil, natural gas drilling mechanical equipment field especially relates to an automatic cementer of balanced type hydraulic locking.

Background

Because the requirements on well cementation environmental protection in the middle and later stages of oil field development are higher and higher, and the cost is controlled more and more tightly, an automatic grouting device is often required to be used, is a key part of a well cementation device and is mainly used for controlling grouting and liquid return in the well cementation process. The patent number is "CN 203879429U"'s document discloses an automatic circulating device that is in milk, include from last to the tool joint, extension joint, dabber, flexible tube, mud valve and the guide cone that connects gradually down, be fixed with the mooring cable ring on the extension joint, be connected with the safety chain on the mooring cable ring, the junction cover of dabber and flexible tube is equipped with attach fitting, the dabber outer wall cover that is located the attach fitting top is equipped with seal assembly and so on. However, most of the existing automatic grouting devices have a simpler internal structure, and when the well cementation operation is carried out, due to different well depths, the device is not easy to adjust in the grouting process, and the midway circulation is easily blocked or the pressure in the well is too high to control, so that the well cementation can not reach the preset effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the following defects in the prior art and providing a balanced hydraulic locking automatic grouting device.

In order to solve the technical problem, the utility model discloses a technical scheme be:

a balanced hydraulic locking automatic grouting device comprises a device shell, wherein a valve body is arranged on the device shell in a sliding mode; the improved air conditioner is characterized in that an adjusting mechanism is arranged on the device shell and comprises a tray fixedly connected to the device shell, a valve head is arranged on the tray in a sliding mode and connected with the tray through a spring, one end of the valve head is clamped with the valve body, an adjusting spare cap is arranged on the device shell and connected with the valve head in a threaded mode.

In order to better solve the technical problem, the utility model discloses a further technical scheme is: two circumferential holes are formed in the tray and are symmetrically arranged.

In order to better solve the technical problem, the utility model discloses a further technical scheme is: the valve body is fixedly connected with two locking pin bodies, and each locking pin body is clamped with the device shell.

In order to better solve the technical problem, the utility model discloses a further technical scheme be: two limiting grooves are formed in the device shell, and a vertical channel and a high-pressure water hole are formed in the valve body.

In order to better solve the technical problem, the utility model discloses a further technical scheme is: the device shell is provided with a steel ball, and the steel ball is connected with the valve body in a sliding mode.

The utility model has the advantages that: through the mutual matching of the valve body and the valve head, on one hand, when the casing is put in, the hydraulic pressure in the well can enter the casing from the outer ring space of the casing and then circularly flow and enter the casing through the device, so that the pressure difference between the inside and the outside of the casing, which is formed at a high speed when the casing is put in, is avoided, and the well fluid is gushed out to cause the damage of personnel and equipment; on the other hand, when in normal grouting, the circulating shunting speed of grouting liquid of the device from the inside of the casing to the outside of the casing is controlled by using the grouting pressure of a wellhead, and the casing is prevented from being extruded and damaged by pressure difference.

When the well cementation reaches the preset effect after the grouting is finished, the phenomenon that the grouting slurry flows upwards through the device from the sleeve and then high-pressure clean water is injected into the sleeve in the well immediately due to the fact that the grouting slurry flows upwards through the sleeve, a locking pin on a valve body of the device is cut off, the valve body slides downwards instantly to be fitted with a lower valve head to form hydraulic locking, under the action of high pressure, clean water is forced to enter a vertical channel of the valve body through an annular hole of the valve body, the valve head is pushed to continue flowing in a one-way mode, the cement slurry is pressed to a preset depth layer and returns outwards from the sleeve, and when the well mouth stops being pressed, the valve head is automatically fitted with the lower portion of the valve body under the pushing force of a spring, and therefore the function of safe well cementation is achieved.

The automatic grouting valve is fast, convenient and simple in use, the opening and closing processes are cancelled, the automatic grouting function is implemented, slurry enters the well through the valve body vertical channel, and the automatic grouting valve is safe and environment-friendly and is beneficial to centralized control of the uniformity of the flow velocity and the flow rate of the slurry.

4. The device has strong applicability, tensile and pressure-bearing capacity, can be suitable for deep well and inclined well operation with inclination of less than fifteen degrees, and has good tensile performance and strong pressure-bearing capacity.

Drawings

Fig. 1 is a schematic front structural view of an automatic grouting state of a balanced hydraulic locking automatic grouting device provided by the present invention;

fig. 2 is a schematic front sectional structural view of a hydraulic locking state of the balanced hydraulic locking automatic grouting device provided by the present invention;

fig. 3 is a schematic diagram of a front cross-sectional structure of a balanced hydraulic locking automatic grouting device for plugging a well cementing state;

fig. 4 is a schematic top sectional view of the device housing and valve body.

In the figure: the device comprises a device shell 1, a valve body 2, a locking pin body 3, a valve head 4, a spring 5, a tray 6, an adjusting spare cap 7, a vertical channel 8, a circumferential hole 9, a steel ball 10, a high-pressure water hole 11 and a limiting groove 12.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

As shown in fig. 1-4, a balanced hydraulic locking automatic grouting device comprises a device shell 1, a valve body 2 is slidably arranged on the device shell 1, an adjusting mechanism is arranged on the device shell 1, the adjusting mechanism comprises a tray 6 fixedly connected to the device shell 1, a valve head 4 is slidably arranged on the tray 6, the valve head 4 is connected with the tray 6 through a spring 5, one end of the valve head 4 is connected with the valve body 2 in a clamped manner, an adjusting spare cap 7 is arranged on the device shell 1, the adjusting spare cap 7 is in threaded connection with the valve head 4, the setting of the adjusting spare cap 7 can limit the movement of the valve head 4 and prevent the valve head 4 and the tray 6 from being separated, two circumferential holes 9 are formed in the tray 6, and the two circumferential holes 9 are symmetrically arranged. The setting of circumference hole 9 makes things convenient for the cement thick liquid to pass through tray 6, two locking pin bodies of fixedly connected with 3 on the valve body 2, every locking pin body 3 all with 1 joint of device shell.

The setting of the locking pin body 3, it is convenient fixed with valve body 2 and device shell 1 joint, thereby guarantee going on smoothly of well cementation work, two spacing grooves 12 have been seted up on the device shell 1, perpendicular passageway 8 and high-pressure water hole 11 have been seted up on the valve body 2, the setting of spacing groove 12, can play a cushioning effect when the locking pin body 3 removes, the setting of perpendicular passageway 8, make things convenient for the cement thick liquid to pass through from valve body 2 is inside, guarantee going on smoothly of grout work, the setting of high-pressure water hole 11, can pour into high-pressure clear water from high-pressure water hole 11, promote the cement thick liquid and enter into certain degree of depth layer, thereby guarantee that the well cementation reaches predetermined effect, be provided with steel ball 10 on the device shell 1, steel ball 10 and valve body 2 sliding connection. The vertical channel 8 on the valve body 2 can be blocked by arranging the steel ball 10, and then the valve body 2 and the device shell 1 slide relatively by utilizing the water pressure acting on the steel ball 10 and the upper end surface of the valve body 2, so that the locking pin on the locking pin body 3 is cut off.

The utility model discloses in, when needs use this device, slowly put into the well again after having well connected this device and supporting bushing, pressure in the well can be from the lower part of device shell 1 inside upwards entering device shell 1, through the circumference hole 9 on the tray 6 inside entering

device shell

1, 8 entering device shell 1 upper portion of the last perpendicular passageway of rethread valve body 2 are connected intraductal, play circulation reposition of redundant personnel downhole pressure during normal operation, the well endotheca is intraductal when ensureing continuous case, the balanced effect of external pressure.

When the casing reaches a preset depth, the grouting and well cementation process is started next step, whether a grouting channel is in a full-pass state is checked, small-displacement grouting is performed firstly, the displacement is increased gradually until the external circulation of a wellhead casing returns to normal, automatic grouting is continued, cement slurry enters the device shell 1 through the upper casing, then descends through a vertical channel 8 on the valve body 2, enters a circumferential hole 9 on a tray 6 through a valve head 4, then automatically pours into a shaft bottom through the circumferential hole 9 and then returns out of the casing, the cement slurry returns to the wellhead, the liquid return condition should be noticed in the whole process, the fact that the grouting is abnormal when the liquid return amount is too large indicates that the circulation of the reverse liquid is blocked when the liquid return amount is too small indicates that the circulation of the reverse liquid is blocked, and corresponding removal measures should be taken timely.

When grouting reaches a preset effect, the phenomenon that cement slurry flows upwards from a sleeve through the device due to sudden rise of the pressure in the well when grouting stops is avoided, a steel ball 10 is immediately thrown into the sleeve in the well, high-pressure clean water is pumped, under the action of water pressure, a locking pin body 3 on a valve body 2 and a device shell 1 slide relatively to cut a locking pin on the locking pin body 3, the valve body 2 slides downwards instantly to be clamped with a lower valve head 4 to form hydraulic locking, under the action of high pressure, clean water is forced to enter a vertical channel 8 on the valve body 2 through a high-pressure water hole 11 on the valve body 2, the spring 5 is compressed while the valve head 4 is pushed to deform the spring 5, the clean water continuously flows downwards in one direction, the cement slurry is pressed to a preset depth layer, and the clean water normally returns out of the sleeve from the inside.

When cement slurry is pressed down to a preset depth layer and return liquid outside a sleeve is normal, namely after well cementation is finished, high-pressure clean water stops being pumped, the valve head 4 automatically rises under the thrust of the spring 5 and is clamped and combined with the lower part of the valve body 2, the lower part of the valve head 4 is locked and limited by the adjusting spare cap 7, and therefore the effect of safe well sealing and well cementation is achieved, on one hand, through mutual matching of the valve body 2 and the valve head 4, in-well hydraulic pressure can enter the sleeve from the outside of the sleeve during casing setting, and circularly shunted by the device and enters the sleeve, so that pressure difference between the inside and the outside of the sleeve is prevented from being formed at a high speed during casing setting, and the well fluid is enabled to gush out to cause personnel and equipment damage; on the other hand, during normal grouting, the grouting liquid of the device is controlled by the grouting pressure of a wellhead, the circulating shunting speed from the inside of the casing to the outside of the casing is controlled, meanwhile, the casing is prevented from being extruded and damaged by pressure difference, when well cementation reaches a preset effect after grouting is finished, high-pressure clean water is prevented from being injected into the casing in the well immediately due to the fact that grouting slurry flows upwards from the casing through the device, a locking pin on a valve body 2 of the device is cut off, the valve body 2 slides downwards instantly to be combined with a lower valve head 4 to form hydraulic locking, clean water is forced to enter a vertical channel 8 on the valve body 2 under the action of high pressure, the valve head 4 is pushed to flow in a single direction, the cement slurry in the deep well is pressed to a preset depth layer and returns out of the casing from the inside of the casing, when the wellhead stops pressing, the valve head 4 automatically contacts with the lower part of the valve body 2 under the thrust of a spring 5, the function of safe well cementation is achieved, the device is fast, simple and convenient in use, the opening and closing process is cancelled, the automatic grouting function of implementing the centralized control of the centralized slurry flow rate, the integral pressure-bearing capability of the well, the pressure-bearing capability of the well is good, the pressure-bearing capability of the well, the device is good, the pressure-bearing capability of the well, the pressure-bearing capability of the device is good.

Claims

1. A balanced type hydraulic locking automatic grouting device comprises a device shell (1), and is characterized in that a valve body (2) is arranged on the device shell (1) in a sliding manner; be provided with adjustment mechanism on device shell (1), adjustment mechanism includes fixed connection's tray (6) on device shell (1), it is provided with valve head (4) to slide on tray (6), valve head (4) are connected through spring (5) and tray (6), the one end and valve body (2) joint of valve head (4), be provided with on device shell (1) and adjust and be equipped with cap (7), adjust and be equipped with cap (7) and valve head (4) threaded connection.

2. The balanced hydraulic locking automatic grouting device according to claim 1, wherein two circumferential holes (9) are formed in the tray (6), and the two circumferential holes (9) are symmetrically arranged.

3. The balanced hydraulic locking automatic grouting device according to claim 2, characterized in that two locking pin bodies (3) are fixedly connected to the valve body (2), and each locking pin body (3) is clamped with the device housing (1).

4. The balanced hydraulic locking automatic grouting device according to claim 3, wherein the device housing (1) is provided with two limiting grooves (12), and the valve body (2) is provided with a vertical channel (8) and a high-pressure water hole (11).

5. The balanced hydraulic locking automatic grouting device according to claim 4, characterized in that a steel ball (10) is arranged on the device housing (1), and the steel ball (10) is slidably connected with the valve body (2).