Pump open type safety valve device and using method thereof

Abstract

The invention discloses a pump open type safety valve device and a using method thereof. The pump open type safety valve device comprises a first connecting component, an upper cylinder sleeve, a connecting joint, a lower cylinder sleeve and a second connecting component to form an outer sleeve, an upper mandrel and a lower mandrel are arranged in the outer sleeve, a fixing sleeve is installed between an inner cavity of the lower cylinder sleeve and the outer portion of the lower mandrel, and the fixing sleeve is connected with the connecting joint through a protrusion. The other side of the fixing sleeve is in threaded connection with the inner side wall of the valve plate outer cylinder, a valve seat body and a valve seat nut are installed in a gap formed by the valve plate outer cylinder and the lower mandrel and are in threaded connection, one end of the valve seat body is connected with the valve plate through a connecting piece, and an elastic connecting piece is arranged at the connecting position of the valve plate and the valve plate outer cylinder. And a rupture disk device is mounted on the connecting joint. The pump open type safety valve device solves the problems that an existing testing tool cannot be opened again after being closed, circulating well killing cannot be achieved if oil gas exists in a shaft, and the well control risk exists in the pipe column operation of the testing tool.

Description

Technical Field

[0001] The present invention relates to the field of formation testing tools, and in particular to a pump-open safety valve device and a use method thereof. Background Art

[0002] The current test tool RDS safety circulation valve is a disposable full-bore circulation valve. Once closed, the valve cannot be opened again. If there is oil and gas in the wellbore, circulation and well pressure cannot be achieved, and there is a well control risk when operating the test tool string. Summary of the Invention

[0003] The main purpose of the present invention is to provide a pump-open safety valve device and a method of using the same, so as to enable the safety valve to be reopened after being closed.

[0004] To achieve the above object, the present invention provides a pump-open safety valve device, comprising an outer sleeve formed by a first connecting member, an upper cylinder sleeve, a connecting joint, a lower cylinder sleeve and a second connecting member that are sealed and connected in sequence, wherein: The cam is secured to the bottom of the valve body with a secure fit and the cam, and the cam is secured to the bottom of the valve body with a secure fit.

[0005] Preferably, the pump-open safety valve device also includes a clamping ring located in the inner cavity of the connecting joint and sleeved on the outside of the lower core shaft. The circumference of the clamping ring is provided with a notch. The clamping ring is a cylindrical body parallel to the axis of the lower core shaft. The inner wall shape of the clamping ring is adapted to the outer wall shape of the lower core shaft to limit the lower core shaft.

[0006] Preferably, plugs are installed on the upper cylinder sleeve and the second connecting component, and a sealing member is installed at the bottom of the plug.

[0007] Preferably, the plugging includes a punching hole fitting section and a plugging sealing section located below it. The punching hole fitting section is provided with an external thread to fit with the punching hole threads on the upper cylinder sleeve and the second connecting component. A seal is installed on the plugging sealing section to seal the gap between it and the punching hole.

[0008] Preferably, a drainage blocking device is installed on the second connecting component, a first punching hole is opened on the outer wall of the upper cylinder sleeve, and a drainage blocking mounting hole and a second punching hole are provided on the outer wall of the second connecting component. The drainage blocking mounting hole and the second punching hole are connected by a channel and are coaxially arranged. The drainage blocking device is located in the drainage blocking mounting hole, and the blockage is located inside the second punching hole.

[0009] Preferably, the drainage blocking device includes a drainage blocking body and a drainage blocking screw installed at the bottom of the drainage blocking body. The side wall of the drainage blocking body is provided with a groove to accommodate a seal. The outer side wall of the drainage blocking body is provided with an external thread to cooperate with the thread of the drainage blocking mounting hole. A seal is installed in the gap between the drainage blocking body and the drainage blocking screw.

[0010] Preferably, a sealing member is provided between the fixed sleeve and the inner wall of the lower cylinder sleeve, and a sealing member is provided at the gap between the valve seat body and the fixed sleeve and at the fitting point between the valve seat body and the valve seat nut; a first sealing section is extended toward one end of the upper cylinder sleeve by the first connecting component, the first sealing section is inserted into the inner hole of the upper cylinder sleeve and is threadedly connected to it, and a sealing member is installed between the first sealing section and the inner wall of the upper cylinder sleeve; a second sealing section is protruding inwardly from the inner side wall of the upper cylinder sleeve, a sealing member is installed between the fourth sealing section and the upper core shaft, a fourth sealing section is protruding outwardly from the outer side wall of the upper core shaft, and a sealing member is installed at the gap between the fourth sealing section and the inner wall of the upper cylinder sleeve; a sealing member is installed between the connecting joint and the upper cylinder sleeve, a sealing member is installed at the gap between the connecting joint and the inner wall of the upper core shaft, and a sealing member is installed at the gap between the connecting joint and the inner wall of the lower cylinder sleeve; a sealing member is installed at the gap between the fixed sleeve and the inner wall of the lower cylinder sleeve, and a sealing member is installed at the gap between the second connecting component and the lower cylinder sleeve.

[0011] Preferably, the rupture disk device comprises a rupture disk pressure cap and a rupture disk located therebelow; wherein, The rupture disk pressure cap includes a rupture disk mounting hole matching section, the rupture disk mounting hole matching section is provided with an external thread, and the inner wall of the rupture disk mounting hole is provided with an internal thread matching the external thread on the rupture disk mounting hole matching section; The rupture disk includes a fifth sealing section, and a fifth sealing component is provided between the fifth sealing section and the inner wall of the rupture disk mounting hole to seal the gap between the fifth sealing section and the inner wall of the rupture disk mounting hole.

[0012] Preferably, the pump-open safety valve device also includes a positioning assembly, which includes a first positioning screw for tightening the connection between the first connecting part and the upper cylinder sleeve, a second positioning screw for tightening the connection between the upper cylinder sleeve and the connecting joint, a third positioning screw for tightening the connection between the connecting joint and the lower cylinder sleeve, and a fourth positioning screw for tightening the lower cylinder sleeve and the second connecting part.

[0013] The present invention further provides a method for using the pump-open safety valve device, comprising the following steps: The rupture disc device is punctured by pressurizing the annulus. The annular pressure is transmitted through the rupture disc device to push the upper core shaft to move. The upper core shaft drives the lower core shaft connected to it with its thread to move upward. The valve plate rotates under the action of the valve plate torsion spring, closing the pump-open safety valve. When the well-killing fluid is pumped in through the first connecting component, the pressure on the upper part of the valve plate is higher than the pressure on the lower part, and the pressure drives the plate valve to reset. At the same time, the upper core shaft drives the lower core shaft to move downward.

[0014] The pump-opening safety valve device proposed in the present invention has the following beneficial effects: 1. After closing the valve, unlike the existing permanently closed valve, this valve only needs to pump the well killing fluid directly through the oil pipe. When the pressure on the upper part of the valve plate is higher than that on the lower pressure plate, the valve will be in the open state, thus realizing circulating well killing. 2. This safety valve uses the upper and lower core shafts in conjunction with the valve seat body and valve seat nut to open and close the valve plate. Its structural design is very clever and reliable. 3. The pump-open safety valve device has the advantages of simple structure, easy implementation and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the internal structure of a preferred embodiment of a pump-open safety valve device of the present invention; Figure 2 It is a partial structural diagram of a preferred embodiment of a pump-open safety valve device of the present invention; Figure 3 It is a cross-sectional structural diagram of a preferred embodiment of the pump-open safety valve device of the present invention from one direction; Figure 4 It is a cross-sectional structural diagram of another direction of a preferred embodiment of the pump-open safety valve device of the present invention; Figure 5 This is a schematic diagram of the external structure of a preferred embodiment of a pump-open safety valve device of the present invention; Figure 6 This is a schematic structural diagram of a blockage in a preferred embodiment of a pump-open safety valve device of the present invention; Figure 7 Schematic diagram of the structure of the liquid discharge blocking device in the preferred embodiment of the pump-open safety valve device of the present invention; Figure 8 This is a schematic structural diagram of a rupture disk device in a preferred embodiment of a pump-open safety valve device of the present invention; Figure 9 This is a schematic diagram of the installation structure of the blocking and drain blocking device in the preferred embodiment of the pump-open safety valve device of the present invention.

[0016] In the figure: 1 first connecting component; 1-1 first through hole; 1-2 first sealing section; 1-3 first positioning groove; 1-4 first fixing portion; 2 upper cylinder sleeve; 2-1 first punching hole; 2-2 second sealing section; 2-3 second positioning groove; 2-4 first connecting end; 2-5 second connecting end; 3 plug; 3-1 punching hole matching section; 3-2 third sealing section; 3-3 third positioning groove; 4 upper core shaft; 4-1 fourth sealing section; 4-2 fourth positioning groove; 4-3 third connecting section; 5 rupture disc device; 5-1 rupture disc pressure cap; 5-2 rupture disc; 5-3 rupture disc mounting hole matching section; 5-4 fifth sealing section; 5-5 fifth positioning groove; 6 connecting joint; 6-1 rupture disc mounting hole; 6-2 sixth sealing section; 6-3 sixth positioning groove; 6-4 seventh sealing section; 6-5 seventh positioning groove; 6-6 eighth sealing section; 6-7 Eighth positioning groove; 6-8 Second fixing portion; 6-9 Fourth fixing portion; 7 Lower cylinder sleeve; 7-1 Fourth connecting end; 7-2 Seventh connecting end; 8 Snap ring; 9 Lower core shaft; 9-1 Third fixing portion; 10 Fixing sleeve; 10-1 Ninth sealing section; 10-2 Ninth positioning groove; 10-3 Fifth fixing portion; 11 Valve plate outer cylinder; 11-1 Fifth connecting end; 12 Valve seat body; 12-1 Sixth fixing portion; 13 Valve seat nut; 13-1 Sixth connecting end; 14 Valve plate torsion spring; 15 Valve plate; 16 Drain plugging device; 16-1 Drain plugging body; 16-2 Drain plugging screw; 16-3 Tenth positioning groove; 16-4 Slot; 17 Second connecting component; 17-1 Second through hole; 17-2 Second pressure hole; 17-3 Drain plugging mounting hole; 17-4 12th sealing section; 17-5 12th positioning groove; 17-6 13th sealing section; 17-7 13th positioning groove; 17-8 7th fixing section; 31 first positioning screw; 32 second positioning screw; 33 third positioning screw; 34 fourth positioning screw; 41 first sealing component; 42 second sealing component; 3-4 third sealing component; 43 fourth sealing component; 5-6 fifth sealing component; 44 sixth sealing component; 45 seventh sealing component; 46 eighth sealing component; 47 ninth sealing component; 16-5 tenth sealing component; 16-6 eleventh sealing component; 48 twelfth sealing component; 49 thirteenth sealing component; 51 fourteenth sealing component; 52 fifteenth sealing component.

[0017] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0018] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] It should be noted that in the description of the present invention, the terms "transverse," "longitudinal," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] The present invention provides a pump-opening safety valve device.

[0021] Reference Figures 1 to 9 In this preferred embodiment, a pump-open safety valve device includes an outer sleeve formed by a first connecting component 1, an upper cylinder sleeve 2, a connecting joint 6, a lower cylinder sleeve 7 and a second connecting component 17 which are sealed and connected in sequence, wherein: The upper core shaft 4 and the lower core shaft 9 sealed therewith are sequentially arranged at the internal through hole of the outer sleeve. A fixing sleeve 10 is installed between the inner cavity of the lower cylinder sleeve 7 and the outside of the lower core shaft 9. One side of the fixing sleeve 10 is fixedly connected to the connecting joint 6 through a protrusion. The other side of the fixing sleeve 10 is threadedly connected to the inner side wall of the valve plate outer tube 11. The valve plate outer tube 11 is located in the inner cavity of the lower cylinder sleeve 7 and the two are fixed. A valve seat body 12 and a valve seat nut 13 are installed in the gap formed by the valve plate outer tube 11 and the lower core shaft 9. The valve seat body 12 and the valve seat nut 13 are connected. The valve seat body 12 is connected to the valve plate 15 via a threaded connection (when the oil and gas passage needs to be closed, the valve seat body 12, valve seat nut 13, and valve plate 15 cooperate to achieve a seal). One end of the valve seat body 12 is connected to the valve plate 15 via a connector. An elastic connector is provided at the connection between the valve plate 15 and the valve plate outer tube 11. The connecting joint 6 is mounted with a rupture disk device 5. When the rupture disk device 5 breaks down, the annular pressure is transmitted through the rupture disk device 5, pushing the upper core shaft 4 to move. The upper core shaft 4 drives the lower core shaft 9 upward, and the valve plate 15 rotates under the action of the elastic connector, closing the pump-to-open safety valve. The interior of the first connecting component 1 is a stepped hole with a stepped table formed on it. The stepped table is used to limit the maximum travel position of the upper core shaft 4.

[0022] The first connecting component 11 has a first through hole 1-1 that allows fluid to flow, and the second connecting component 17 has a second through hole 17-1 that allows fluid to flow. The upper core shaft 4 and the lower core shaft 9 have a circulation channel extending axially inside, so that the fluid entering the safety valve from the first through hole 1-11 can flow to the second through hole 17-1 through the circulation channel.

[0023] In this embodiment, the valve plate outer tube 11 is arranged in the inner cavity of the lower cylinder sleeve 7, and the axis is parallel to the axis of the lower cylinder sleeve 7; the valve plate 15 is located on the right side of the valve plate outer tube 11, and the valve plate 15 is connected to the valve plate outer tube 11 through a connecting piece, and a valve plate torsion spring 14 is provided at the connection between the valve plate 15 and the valve plate outer tube 11, and the valve plate torsion spring 14 is in a stressed state when the valve plate 15 is opened.

[0024] The valve seat body 12 and the valve seat nut 13 are arranged in the inner cavity of the valve plate outer tube 11, and the axis thereof is parallel to the axis of the lower valve plate outer tube 11; The valve seat body 12 is connected to the valve seat nut 13, and a fifteenth sealing component 52 is provided at the connection point to seal the gap between the valve plate 15 and the valve seat body 12; A fourteenth sealing component 51 is provided on the left side of the valve seat body 12 to seal the gap between the valve seat body 12 and the fixing sleeve 10 .

[0025] In this embodiment, the two ends of the upper cylinder sleeve 22 along the axial direction are respectively the first connecting end 2-4 and the second connecting end 2-5; the first connecting component 11 includes a first fixing portion 1-4, an external thread is provided on the first fixing portion 1-4, and an internal thread matching the external thread on the first fixing portion 1-4 is provided on the inner wall of the first connecting end 2-4, and the first connecting component 11 is threadedly connected to the first connecting end 2-4 through the first fixing portion 1-4; the connecting joint 6 includes a second fixing portion 6-8, an internal thread is provided on the second fixing portion 6-8, and an external thread matching the internal thread on the second fixing portion 6-8 is provided on the outer wall of the second connecting end 2-5, and the connecting joint 6 is threadedly connected to the second connecting end 2-5 through the second fixing portion 6-8.

[0026] The right end of the upper core shaft 4 is the third connecting end 4-3; the lower core shaft 9 includes a third fixing portion 9-1, on which an external thread is provided, and an internal thread matching the external thread on the third fixing portion 9-1 is provided on the inner wall of the third connecting end 4-3, and the lower core shaft 9 is threadedly connected to the third connecting end 4-3 through the third fixing portion 9-1.

[0027] The two ends of the lower cylinder sleeve 7 along the axial direction are respectively the fourth connecting end 7-1 and the seventh connecting end 7-2; the connecting joint 6 includes a fourth fixing portion 6-9, an external thread is provided on the fourth fixing portion 6-9, and an internal thread matching the external thread on the fourth fixing portion 6-9 is provided on the inner wall of the fourth connecting end 7-1, and the connecting joint 6 is threadedly connected to the fourth connecting end 7-1 through the fourth fixing portion 6-9; the second connecting component 17 includes a seventh fixing section 17-8, an internal thread is provided on the seventh fixing section 17-8, and an external thread matching the internal thread on the seventh fixing section 17-8 is provided on the outer wall of the seventh connecting end 7-2, and the second connecting component 17 is threadedly connected to the seventh connecting end 7-2 through the seventh fixing section 17-8.

[0028] Specifically, refer to Figure 3 and Figure 4 The left end of the valve plate outer tube 11 is the fifth connecting end 11-1. The fixing sleeve 10 includes a ninth positioning groove 10-2, which is provided with an external thread. The inner wall of the fifth connecting end 11-1 is provided with an internal thread that matches the external thread of the ninth positioning groove 10-2. The fixing sleeve 10 is threadedly connected to the fifth connecting end 11-1 via the ninth positioning groove 10-2. The left end of the valve seat nut 13 is the sixth connecting end 13-1. The valve seat body 12 includes a sixth fixing portion 12-1, which is provided with an external thread. The inner wall of the sixth connecting end 13-1 is provided with an internal thread that matches the external thread of the sixth fixing portion 12-1. The valve seat body 12 is threadedly connected to the sixth connecting end 13-1 via the sixth fixing portion 12-1.

[0029] Further, refer to Figure 1 and Figure 2 The pump-open safety valve device also includes a clamping ring 8 located in the inner cavity of the connecting joint 6 and sleeved on the outside of the lower core shaft 9. A notch is provided on the circumference of the clamping ring 8 (the notch is used to limit the lower core shaft 9. The notch allows the clamping ring 8 to shrink, and the clamping ring 8 forms an elastic body because the whole circle is not elastic). The clamping ring 8 is a columnar body parallel to the axis of the lower core shaft 9. The shape of the inner side wall of the clamping ring 8 is adapted to the shape of the outer side wall of the lower core shaft 9 to limit the lower core shaft 9. In other words, the clamping ring 8 and the lower core shaft 9 are snap-connected to achieve a fixed connection between the two.

[0030] Furthermore, a plug 3 is installed on both the upper cylinder sleeve 2 and the second connecting member 17, and a seal is installed at the bottom of the plug 3. Figure 6 In this embodiment, a specific structure of the plug 3 is proposed: the plug 3 includes a punching hole matching section 3-1 and a plugging sealing section (that is, the third sealing section 3-2) located below it. The punching hole matching section 3-1 is provided with an external thread to match the punching hole thread on the upper cylinder sleeve 2 and the second connecting component 17. A sealing member is installed on the plugging sealing section to seal the gap between it and the punching hole. In actual production, the sealing member can be an O-shaped rubber ring, which is sleeved on the plugging sealing section. A positioning groove extending in the circumferential direction is provided on the outer wall of the plugging sealing section. The seal is at least partially located in the positioning groove, which can ensure the stability of the installation of the sealing member and the accuracy of the installation position. The main function of the seal here is to prevent solid impurities in the annulus from entering the piston and not affect the discharge of gas at the piston when the valve plate 15 is closed.

[0031] Furthermore, a drainage blocking device 16 is installed on the second connecting component 17, a first pressing hole 2-1 is opened on the outer wall of the upper cylinder sleeve 2, and a drainage blocking mounting hole 17-3 and a second pressing hole 17-2 are provided on the outer wall of the second connecting component 17. The drainage blocking mounting hole 17-3 and the second pressing hole 17-2 are connected by a channel and are coaxially arranged. The drainage blocking device 16 is located in the drainage blocking mounting hole 17-3, and the first pressing hole 2-1 and the second pressing hole 17-2 are both installed with a blockage 3.

[0032] Combined with reference Figure 7 and Figure 9 This embodiment proposes a specific structure of a drain plugging device 16: the drain plugging device 16 includes a drain plugging body 16-1 (the tenth sealing section) and a drain plugging screw 16-2 installed on the drain plugging mounting hole 17-3 at the bottom of the drain plugging body 16-1. The side wall of the drain plugging body 16-1 is provided with a groove 16-4 to accommodate a seal (the tenth sealing component 16-5). The outer side wall of the drain plugging body 16-1 is provided with an external thread to cooperate with the thread of the drain plugging mounting hole 17-3. A seal (the eleventh sealing component 16-6, used to seal the gap between the drain plugging device 16 and the bottom of the drain plugging mounting hole 17-3) is installed in the gap between the drain plugging body 16-1 and the drain plugging screw 16-2. A circumferential seal is provided on the drain plugging body 16-1, and the seal is at least partially located within the positioning groove. This can ensure the stability of the installation of the seal and the accuracy of the installation position to ensure the sealing effect.

[0033] The exterior of the drain plug body 16 - 1 is provided with an external thread, and the inner wall of the drain plug mounting hole 17 - 3 is provided with an internal thread matching the external thread on the drain plug body 16 - 1 .

[0034] Furthermore, a seal is provided between the fixed sleeve 10 and the inner wall of the lower cylinder sleeve 7 , and seals are provided at the gap between the valve seat body 12 and the fixed sleeve 10 and at the fitting position between the valve seat body 12 and the valve seat nut 13 .

[0035] Specifically, in this embodiment, the first connecting component 1 has a first sealing section 1-2 extending toward one end of the upper cylinder sleeve 2, the first sealing section 1-2 is inserted into the inner hole of the upper cylinder sleeve 2 and is threadedly connected to it, and a seal is installed between the first sealing section 1-2 and the inner wall of the upper cylinder sleeve 2; a second sealing section 2-2 protrudes inwardly from the inner side wall of the upper cylinder sleeve 2, a seal is installed between the fourth sealing section 4-1 and the upper core shaft 4, a fourth sealing section 4-1 protrudes outward from the outer side wall of the upper core shaft 4, and a seal is installed at the gap between the fourth sealing section 4-1 and the inner wall of the upper cylinder sleeve 2; a seal is installed between the connecting joint 6 and the upper cylinder sleeve 2, a seal is installed at the gap between the connecting joint 6 and the inner wall of the upper core shaft 4, and a seal is installed at the gap between the connecting joint 6 and the inner wall of the lower cylinder sleeve 7; a seal is installed at the gap between the fixing sleeve 10 and the inner wall of the lower cylinder sleeve 7, and a seal is installed at the gap between the second connecting component 17 and the lower cylinder sleeve 7.

[0036] The following structure is used to install the seal: The right end of the first connecting component 1 cooperates with the upper cylinder sleeve 2; the first connecting component 1 includes a first sealing section 1-2, the outer contour of the first sealing section 1-2 is a columnar body whose axis is parallel to the axis of the first connecting component 11. When the upper cylinder sleeve 22 is connected to the first connecting component 1, the first sealing section 1-2 is located inside the upper cylinder sleeve 22, and a first sealing component 41 is provided between the first sealing section 1-2 and the inner wall of the upper cylinder sleeve 2 to seal the gap between the first sealing section 1-2 and the inner wall of the upper cylinder sleeve 2.

[0037] An upper core shaft 4 is provided in the inner cavity of the upper cylinder liner 2 and cooperates with the upper core shaft 4; the upper cylinder liner 2 includes a second sealing section 2-2, the outer contour of the second sealing section 2-2 is a columnar body whose axis is parallel to the axis of the upper cylinder liner 2. When the upper core shaft 4 cooperates with the upper cylinder liner 2, the second sealing section 2-2 is located outside the upper core shaft 4, and a second sealing component 42 is provided between the second sealing section 2-2 and the inner wall of the upper core shaft 4 to seal the gap between the upper core shaft 44 and the inner wall of the second sealing section 2-2.

[0038] The upper core shaft 4 includes a fourth sealing section 4-1. The outer contour of the fourth sealing section 4-1 is a columnar body whose axis is parallel to the axis of the upper core shaft 4. When the upper core shaft 4 is matched with the upper cylinder sleeve 2, the fourth sealing section 4-1 is located inside the upper cylinder sleeve 2. A fourth sealing component 43 is provided between the fourth sealing section 4-1 and the inner wall of the upper cylinder sleeve 2 to seal the gap between the upper cylinder sleeve 22 and the inner wall of the fourth sealing section 4-1.

[0039] The connecting joint 6 is respectively matched with the upper cylinder sleeve 2 and the lower cylinder sleeve 7 at both ends along the axial direction, and the inner wall of the connecting joint 6 is matched with the upper core shaft 4; the connecting joint 6 includes a sixth sealing segment 6-2, and the outer contour of the sixth sealing segment 6-2 is a columnar body whose axis is parallel to the axis of the connecting joint 6. When the connecting joint 6 is matched with the upper cylinder sleeve 2, the sixth sealing segment 6-2 is located outside the connecting joint 6, and a sixth sealing component 44 is provided between the sixth sealing segment 6-2 and the inner wall of the upper cylinder sleeve 2 to seal the gap between the sixth sealing segment 6-2 and the inner wall of the upper cylinder sleeve 2.

[0040] The connecting joint 6 includes a seventh sealing segment 6-4, the outer contour of the seventh sealing segment 6-4 is a columnar body whose axis is parallel to the axis of the connecting joint 6. When the connecting joint 6 is matched with the upper core shaft 4, the seventh sealing segment 6-4 is located inside the connecting joint 6, and a seventh sealing component 45 is provided between the seventh sealing segment 6-4 and the inner wall of the upper core shaft 4 to seal the gap between the seventh sealing segment 6-4 and the inner wall of the upper core shaft 4.

[0041] The connecting joint 6 includes an eighth sealing segment 6-6. The outer contour of the eighth sealing segment 6-6 is a columnar body whose axis is parallel to the axis of the connecting joint 6. When the connecting joint 6 is matched with the lower cylinder liner 7, the eighth sealing segment 6-6 is located outside the connecting joint 6. An eighth sealing component 46 is provided between the eighth sealing segment 6-6 and the inner wall of the lower cylinder liner 7 to seal the gap between the eighth sealing segment 6-6 and the inner wall of the lower cylinder liner 7.

[0042] The fixed sleeve 10 is arranged in the inner cavity of the lower cylinder sleeve 7 and cooperates with the lower cylinder sleeve 7; the fixed sleeve 10 includes a ninth sealing segment 10-1, the outer contour of the ninth sealing segment 10-1 is a columnar body whose axis is parallel to the axis of the fixed sleeve 10. When the fixed sleeve 10 cooperates with the lower cylinder sleeve 7, the ninth sealing segment 10-1 is located outside the fixed sleeve 10, and a ninth sealing component 47 is provided between the ninth sealing segment 10-1 and the inner wall of the lower cylinder sleeve 7 to seal the gap between the ninth sealing segment 10-1 and the inner wall of the lower cylinder sleeve 7.

[0043] The left end of the second connecting component 17 cooperates with the lower cylinder liner 7; the second connecting component 17 includes a twelfth sealing segment 17-4, the outer contour of the twelfth sealing segment 17-4 is a columnar body whose axis is parallel to the axis of the second connecting component 17. When the second connecting component 17 is connected to the lower cylinder liner 7, the twelfth sealing segment 17-4 is located inside the lower cylinder liner 7, and a twelfth sealing component 48 is provided between the twelfth sealing segment 17-4 and the inner wall of the lower cylinder liner 7 to seal the gap between the twelfth sealing segment 17-4 and the inner wall of the lower cylinder liner 7.

[0044] In this embodiment, a first positioning groove 1-3 extending in a circumferential direction is provided on the outer wall of the first sealing segment 1-2, and the first sealing component 41 is at least partially located within the first positioning groove 1-3. A second positioning groove 2-3 extending in a circumferential direction is provided on the outer wall of the second sealing segment 2-2, and the second sealing component 42 is at least partially located within the second positioning groove 2-3. A third positioning groove 3-3 extending in a circumferential direction is provided on the outer wall of the third sealing segment 3-2, and the third sealing component 3-4 is at least partially located within the third positioning groove 3-3. A fourth positioning groove 4-2 extending in a circumferential direction is provided on the outer wall of the fourth sealing segment 4-1, and the fourth sealing component 43 is at least partially located within the fourth positioning groove 4-2. A fifth positioning groove 5-5 extending in a circumferential direction is provided on the outer wall of the fifth sealing segment 5-4, and the fifth sealing component 5-6 is at least partially located within the fifth positioning groove 5-5. A sixth positioning groove 6-3 extending in a circumferential direction is provided on the outer wall of the sixth sealing segment 6-2, and the sixth sealing component 44 is at least partially located within the sixth positioning groove 6-3. A seventh positioning groove 6-5 extending circumferentially is provided on the outer wall of the seventh sealing segment 6-4, and the seventh sealing component 45 is at least partially located within the seventh positioning groove 6-5. An eighth positioning groove 6-7 extending circumferentially is provided on the outer wall of the eighth sealing segment 6-6, and the eighth sealing component 46 is at least partially located within the eighth positioning groove 6-7. A ninth positioning groove 10-2 extending circumferentially is provided on the outer wall of the ninth sealing segment 10-1, and the ninth sealing component 47 is at least partially located within the ninth positioning groove 10-2. A tenth positioning groove 16-3 extending circumferentially is provided on the outer wall of the tenth sealing segment 16-3, and the tenth sealing component 16-5 is at least partially located within the tenth positioning groove 16-3. An eleventh sealing component 16-6 is provided at the connection between the drain plug body 16-1 and the drain plug screw 16-2, and the eleventh sealing component 16-6 is at least partially located within the connection between the drain plug body 16-1 and the drain plug screw 16-2. A twelfth positioning groove 17-5 extending in the circumferential direction is provided on the outer wall of the twelfth sealing segment 17-4, and the twelfth sealing component 48 is at least partially located within the twelfth positioning groove 17-5. A thirteenth positioning groove 17-7 extending in the circumferential direction is provided on the outer wall of the thirteenth sealing segment 17-6, and the thirteenth sealing component 49 is at least partially located within the thirteenth positioning groove 17-7.

[0045] A rupture disk mounting hole 6 - 1 is provided on the outer wall of the connecting joint 6 , and the rupture disk device 5 is located in the rupture disk mounting hole 6 - 1 .

[0046] In this embodiment, the rupture disk device 5 includes a rupture disk pressure cap 5-1 and a rupture disk 5-2; The rupture disk pressure cap 5-1 includes a rupture disk mounting hole mating section 5-3, which is provided with an external thread. The inner wall of the rupture disk mounting hole 6-1 is provided with an internal thread that matches the external thread on the rupture disk mounting hole mating section 5-3. The rupture disk pressure sleeve 5-1 is threadedly connected to the rupture disk mounting hole 6-1 through the rupture disk mounting hole mating section 5-3. The rupture disk 5-2 includes a fifth sealing section 5-4, the outer contour of the fifth sealing section 5-4 is a columnar body whose axis is parallel to the axis of the rupture disk mounting hole 6-1. When the rupture disk 5-2 is connected to the rupture disk mounting hole 6-1, the fifth sealing section 5-4 is located inside the rupture disk mounting hole 6-1. The outer contour of the fifth sealing section 5-4 is a columnar body whose axis is parallel to the axis of the rupture disk mounting hole 6-1. A fifth sealing component 5-6 is provided between the fifth sealing section 5-4 and the inner wall of the rupture disk mounting hole 6-1 to seal the gap between the fifth sealing section 5-4 and the inner wall of the rupture disk mounting hole 6-1; the rupture disk 5-2 is pressurized by the annulus, and the rupture disk 5-2 is punctured under the action of the internal and external pressure difference to conduct pressure.

[0047] Furthermore, the pump-open safety valve device also includes a positioning assembly, which includes a first positioning screw 31 for tightening the connection between the first connecting component 1 and the upper cylinder sleeve 2, a second positioning screw 32 for tightening the connection between the upper cylinder sleeve 2 and the connecting joint 6, a third positioning screw 33 for tightening the connection between the connecting joint 6 and the lower cylinder sleeve 7, and a fourth positioning screw 34 for tightening the connection between the lower cylinder sleeve 7 and the second connecting component 17.

[0048] Specifically, the following structure can be used to achieve this: a first positioning screw hole extending radially along the upper cylinder liner 2 and matching the first positioning screw 31 is provided on the side wall of the first connecting end 2-4. The first positioning screw 31 is threadedly connected to the first positioning screw hole and can abut the surface of the first fixing portion 1-4. A second positioning screw hole extending radially along the upper cylinder liner 22 and matching the second positioning screw 32 is provided on the side wall of the second connecting end 2-5. The second positioning screw 32 is threadedly connected to the second positioning screw hole and can abut the surface of the second fixing portion 6-8. A third positioning screw hole extending radially along the lower cylinder liner 7 and matching the third positioning screw 3 is provided on the side wall of the fourth connecting end 7-1. The third positioning screw 33 is threadedly connected to the third positioning screw hole and can abut the surface of the fourth fixing portion 6-9. A fourth positioning screw hole extending radially along the lower cylinder sleeve 7 and matching the fourth positioning screw 34 is provided on the side wall of the seventh connecting end 7-2. The fourth positioning screw 34 is threadedly connected in the fourth positioning screw hole and can abut against the surface of the seventh fixing section 17-8.

[0049] The working principle of this pump open type safety valve device is as follows: After the pump-open safety valve device is installed in place, when the valve needs to be closed, the rupture disk device 5 is punctured by annular pressure, and the annular pressure is transmitted through the rupture disk device 5 to push the upper core shaft 4 to move. The upper core shaft 4 drives the lower core shaft 9 threadedly connected to it to move upward, and the valve plate 15 rotates under the action of the valve plate torsion spring 14, so that the pump-open safety valve is closed; When the well-killing fluid is pumped into the first connecting component 1, the pressure on the upper part of the valve plate 15 is higher than the pressure on the lower part, and the pressure drives the plate valve to reset. At the same time, the upper core shaft 4 drives the lower core shaft 9 to move downward.

[0050] The pump-opening safety valve device proposed in this embodiment has the following beneficial effects: 1. After closing the valve, unlike the existing permanently closed valve, this valve only needs to pump the well killing fluid directly through the oil pipe. When the pressure on the upper part of the valve plate 15 is higher than that on the lower pressure plate, the valve is in the open state, thereby realizing circulating well killing; 2. This safety valve uses the upper core shaft 4 and the lower core shaft 9 in conjunction with the valve seat body 12 and the valve seat nut 13 to realize the opening and closing of the valve plate 15. Its structural design is very ingenious and reliable; 3. The pump-open safety valve device has the advantages of simple structure, easy implementation and stable operation.

[0051] The present invention further provides a method for using the pump-open safety valve device.

[0052] In this preferred embodiment, a method for using the pump-open safety valve device includes the following steps: The rupture disk device 5 is punctured by pressurizing the annulus. The annular pressure is transmitted through the rupture disk device 5 to push the upper core shaft 4 to move. The upper core shaft 4 drives the lower core shaft 9 threadedly connected to it to move upward. The valve plate 15 rotates under the action of the valve plate torsion spring 14, so that the pump-open safety valve is closed. When the well-killing fluid is pumped into the first connecting component 1, the pressure on the upper part of the valve plate 15 is higher than the pressure on the lower part, and the pressure drives the plate valve to reset. At the same time, the upper core shaft 4 drives the lower core shaft 9 to move downward.

[0053] The method for using the pump-open safety valve device proposed in the present invention has a simple and convenient operation process and is very suitable for formation testing.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pump-open safety valve device, characterized in that: The outer sleeve is formed by a first connecting component, an upper cylinder sleeve, a connecting joint, a lower cylinder sleeve and a second connecting component which are sealed and connected in sequence, wherein: The cam is secured to the bottom of the valve body with a secure fit and the cam, and the cam is secured to the bottom of the valve body with a secure fit.

2. The pump-open safety valve device according to claim 1, characterized in that: It also includes a clamping ring located in the inner cavity of the connecting joint and sleeved on the outside of the lower core shaft. A notch is set on the circumference of the clamping ring. The clamping ring is a cylindrical body parallel to the axis of the lower core shaft. The inner wall shape of the clamping ring is adapted to the outer wall shape of the lower core shaft to limit the lower core shaft.

3. The pump-open safety valve device according to claim 1, characterized in that: The upper cylinder sleeve and the second connecting component are both provided with plugs, and a sealing member is provided at the bottom of the plug.

4. The pump-open safety valve device according to claim 3, characterized in that: The plugging includes a punching hole fitting section and a plugging sealing section located below it. The punching hole fitting section is provided with an external thread to fit with the punching hole thread on the upper cylinder sleeve and the second connecting component. A sealing member is installed on the plugging sealing section to seal the gap between it and the punching hole.

5. The pump-open safety valve device according to claim 3, characterized in that: A drainage blocking device is installed on the second connecting component, a first punching hole is opened on the outer wall of the upper cylinder sleeve, and a drainage blocking mounting hole and a second punching hole are provided on the outer wall of the second connecting component. The drainage blocking mounting hole and the second punching hole are connected by a channel and are coaxially arranged. The drainage blocking device is located in the drainage blocking mounting hole, and the blockage is located inside the second punching hole.

6. The pump-open type safety valve device according to claim 5, characterized in that: The drainage blocking device includes a drainage blocking body and a drainage blocking screw installed at the bottom of the drainage blocking body. The side wall of the drainage blocking body is provided with a groove to accommodate a seal. The outer side wall of the drainage blocking body is provided with an external thread to cooperate with the thread of the drainage blocking mounting hole. A seal is installed in the gap between the drainage blocking body and the drainage blocking screw.

7. The pump-open type safety valve device according to claim 1, characterized in that: A sealing member is provided between the fixed sleeve and the inner wall of the lower cylinder sleeve, and a sealing member is provided at the gap between the valve seat body and the fixed sleeve and at the fitting place between the valve seat body and the valve seat nut; a first sealing section is extended toward one end of the upper cylinder sleeve by the first connecting component, the first sealing section is inserted into the inner hole of the upper cylinder sleeve and is threadedly connected to it, and a sealing member is installed between the first sealing section and the inner wall of the upper cylinder sleeve; a second sealing section is protruding inwardly from the inner side wall of the upper cylinder sleeve, a sealing member is installed between the fourth sealing section and the upper core shaft, a fourth sealing section is protruding outwardly from the outer side wall of the upper core shaft, and a sealing member is installed at the gap between the fourth sealing section and the inner wall of the upper cylinder sleeve; a sealing member is installed between the connecting joint and the upper cylinder sleeve, a sealing member is installed at the gap between the connecting joint and the inner wall of the upper core shaft, and a sealing member is installed at the gap between the connecting joint and the inner wall of the lower cylinder sleeve; a sealing member is installed at the gap between the fixed sleeve and the inner wall of the lower cylinder sleeve, and a sealing member is installed at the gap between the second connecting component and the lower cylinder sleeve.

8. The pump-open type safety valve device according to claim 1, characterized in that: The rupture disk device includes a rupture disk pressure cap and a rupture disk located below the rupture disk; wherein, The rupture disk pressure cap includes a rupture disk mounting hole matching section, the rupture disk mounting hole matching section is provided with an external thread, and the inner wall of the rupture disk mounting hole is provided with an internal thread matching the external thread on the rupture disk mounting hole matching section; The rupture disk includes a fifth sealing section, and a fifth sealing component is provided between the fifth sealing section and the inner wall of the rupture disk mounting hole to seal the gap between the fifth sealing section and the inner wall of the rupture disk mounting hole.

9. The pump-open type safety valve device according to any one of claims 1 to 8, characterized in that: It also includes a positioning assembly, which includes a first positioning screw for tightening the connection between the first connecting component and the upper cylinder liner, a second positioning screw for tightening the connection between the upper cylinder liner and the connecting joint, a third positioning screw for tightening the connection between the connecting joint and the lower cylinder liner, and a fourth positioning screw for tightening the lower cylinder liner and the second connecting component.

10. A method for using the pump-open safety valve device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The rupture disc device is punctured by pressurizing the annulus. The annular pressure is transmitted through the rupture disc device to push the upper core shaft to move. The upper core shaft drives the lower core shaft connected to it with its thread to move upward. The valve plate rotates under the action of the valve plate torsion spring, closing the pump-open safety valve. When the well-killing fluid is pumped in through the first connecting component, the pressure on the upper part of the valve plate is higher than the pressure on the lower part, and the pressure drives the plate valve to reset. At the same time, the upper core shaft drives the lower core shaft to move downward.

Images