CN217925814U - One-way temporary sealer for oil pipe - Google Patents

Abstract

The utility model discloses an one-way ware of temporarily sealing of oil pipe relates to the valve gear technical field at the well head, solves well head overflow, well control risk technical problem, including valve body, left-hand thread joint, thimble joint and check valve group, it is that the valve body chamber is seted up to the axial on the valve body, and left-hand thread joint sets up in the valve body intracavity, and it has the left-hand thread chamber to open along left-hand thread joint axial, and the linkage segment warp first threaded connection of thimble joint connects the left-hand thread intracavity of one end, and the section of stretching out that the thimble connects stretches to the check valve group of connection at the left-hand thread joint other end through the left-hand thread chamber. Temporarily sealing the oil pipe through the one-way sealing action of the one-way valve group to prevent the pressurized well fluid in the well from overflowing; through the sealing action of thimble joint control check valve group, be convenient for take the pressure well liquid to the area in the well and carry out safe pressure release, eliminate the well accuse risk, provide the safety guarantee for adorning the well head operation, have higher practical value.

Description

One-way temporary sealer for oil pipe

Technical Field

The utility model relates to a well at the well head or the valve gear of well, especially an one-way temporary sealing ware of oil pipe.

Background

It is known that in oil and water extraction, when the well is lifted, the well head must be installed with a blowout preventer and a plug valve to ensure the safety of well control, and normal construction can be performed only when the pressure of the well head oil pipe and the casing pipe is zero.

At present, for oil-water wells which are easy to overflow, such as abnormally high-pressure wells, gas-containing wells and the like, a well control fluid is mainly adopted to control the wells to ensure that the well mouths do not overflow and have pressure, and the well mouths still have overflow phenomena due to gas invasion, leakage of the well control fluid and the like in the wells; in addition, when the wellhead is inversely installed, time difference exists between the blowout preventer and the well completion opening, the wellhead is in an out-of-control state, serious well control and environmental protection risks exist, and even blowout accidents can occur.

Technical staff tries to solve the problems through various methods, for example, in the Chinese utility model patent with application number 202020114967.3, the utility model discloses a "splash-proof device for pulling down an oil pipe", which comprises a main body and a locking component, wherein the main body comprises two split bodies which can be opened and closed along the radial direction of an oil pipe coupling, the two split bodies are pivoted and form an accommodating cavity for accommodating the oil pipe coupling after being closed, one end of the oil pipe coupling is connected with the oil pipe, one end of the accommodating cavity is provided with an opening which is used for accommodating the oil pipe and is clamped on the oil pipe coupling, the other end of the accommodating cavity is provided with a sealing plate for plugging the other end of the oil pipe coupling, the locking component is used for locking and fixing the splash-proof device for pulling down the oil pipe on the oil pipe coupling, an air hole for connecting the oil pipe coupling with the outside air is arranged in the sealing plate, and an air valve is arranged in the air hole for realizing the communication and the sealing of the oil pipe coupling and the outside air. The oil pipe coupling is accommodated in the accommodating cavity and is plugged, so that the anti-splashing function of the oil pipe is achieved.

If also, in chinese utility model patent application No. 202120421342.6, disclose "there is pole oil recovery system oil pipe downhole blowout preventer", it is connected with the connecting pipe at the lower extreme of oil pipe one, the connecting pipe lower extreme is connected with oil pipe two, oil pipe one upper end is connected with the check valve, be equipped with the oil feed part on the lateral wall of oil pipe one bottom, oil pipe one bottom is connected with prevents spouting part two, oil pipe two inner walls are equipped with prevents spouting part one, prevent spouting part one including the circular block, circular block fixed mounting is on oil pipe two inner walls, circular block lower extreme central point is equipped with the recess, be equipped with through-hole two in the recess, be equipped with through-hole one on the circular block, through-hole one is outside the recess, be equipped with the spout on the circular block, the spout is located the recess, the spout is located the through-hole two outsides, it makes there is pole oil pipe downhole to have dual blowout prevention effect through the structure setting.

If again, in the chinese utility model patent of application number 201020294363.8, a "controllable friction-type prevents spouting the stopper in the oil pipe" is disclosed, wherein, prevent spouting the stopper body and include the cavity casing and connect the check valve quick-operation joint in cavity casing one end, the cavity casing appearance is long cylinder, the post is in cavity casing center axis position, the central axis position outside is the cavity body, there is the rubber disc between the cavity body and the cavity casing outer wall, the inboard drum tripe in the rubber disc, the rubber disc outside is gapped with the cavity casing outer wall, the equipartition has the diameter to be 0.5 ~ 27 mm's steel wire in the clearance. The method is characterized in that air pressure or oil pressure is filled into a cavity body through a quick connector of a one-way valve, the diameter of an outer arm of the cavity shell is adjusted, the friction force is adjusted, and finally the blowout prevention plug body in an oil pipe cannot be ejected out of a well during blowout.

Obviously, the technical scheme of above disclosed technology and the technical problem that will solve and the beneficial effect who produces all with the utility model discloses inequality, perhaps technical field or application are different, are directed against the utility model discloses more technical problem and the beneficial effect that will solve, above all there is not technological inspiration in the technical document of disclosing.

Disclosure of Invention

To the above-mentioned defect that prior art exists, the utility model provides an one-way ware of sealing temporarily of oil pipe aims at sealing temporarily to oil pipe, prevents that the area pressure well liquid in the well from spilling over to carry out safe dress well head operation, eliminate the well accuse risk.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an one-way temporary sealer of oil pipe, its characterized in that includes valve body, left-hand thread connects, thimble connects and check valve group axial sets up the valve body chamber on the valve body, left-hand thread connects the setting at the valve body intracavity, and it has the left-hand thread chamber to open along left-hand thread connects the axial, the linkage segment that the thimble connects is through the left-hand thread intracavity of first threaded connection at left-hand thread connects one end, and the section of stretching out that the thimble connects is worn to stretch to the check valve group of connection at the left-hand thread connects the other end through the left-hand thread chamber set up thimble chamber and first pressure release hole on the thimble connects, the coaxial setting in the linkage segment that the thimble chamber connects, first pressure release hole intercommunication thimble chamber and left-hand thread chamber, the intercommunication or the disconnection of check valve group control left-hand thread chamber and valve body chamber.

Preferably, check valve group includes disk seat, spring holder, compression spring and valve ball, the coaxial setting of disk seat is in the left-hand thread intracavity that the left-hand thread connects, the spring holder connects the axial with the left-hand thread and is connected, and cooperates the left-hand thread to connect spacing to the disk seat axial open the disk seat chamber on the disk seat axially open there are spring chamber and intercommunicating pore on the spring holder, left-hand thread chamber, valve seat chamber and spring chamber axial intercommunication in proper order, the spring chamber is through intercommunicating pore and valve body chamber intercommunication, valve ball, compression spring set up in the spring chamber, and compression spring's one end compresses tightly the spring holder, and the other end compresses tightly the valve ball on the disk seat, and shutoff disk seat chamber, the section that stretches out that the thimble connects is worn to press on the valve ball through the disk seat chamber.

Preferably, a second thread is arranged between the back-off joint and the valve body, the back-off joint is arranged in a valve body cavity of the valve body through the second thread, and the turning direction of the second thread is opposite to that of the first thread.

Preferably, a plurality of second pressure relief holes are radially formed in the ejector pin joint.

Preferably, a connection internal thread is arranged in the thimble cavity at one end of the thimble joint far away from the extending section.

Preferably, a sealing ring is arranged between the back-off joint and the valve body.

The utility model discloses a valve body, left-hand thread connect, thimble connects and check valve group, and it is that the valve body chamber is seted up to the axial on the valve body, and left-hand thread connects the setting at the valve body intracavity, and it has the left-hand thread chamber to open along left-hand thread connects the axial, and the linkage segment that the thimble connects is through first threaded connection in the left-hand thread intracavity of left-hand thread joint one end, and the section of stretching out that the thimble connects is worn through the left-hand thread chamber and is stretched to the check valve group of connection at the left-hand thread joint other end. Temporarily sealing the oil pipe through the one-way sealing action of the one-way valve group to prevent the pressurized well fluid in the well from overflowing; the sealing action of the check valve group is controlled through the thimble joint, so that the pressurized well fluid in the well can be safely decompressed, well control risks are eliminated, and safety guarantee is provided for well mouth installation operation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. the valve comprises a valve body, 11 a valve body cavity, 2 a reverse buckling joint, 21 a reverse buckling cavity, 3 an ejector pin joint, 31 a connecting section, 32 an extending section, 33 a first thread, 34 an ejector pin cavity, 35 a first pressure relief hole, 36 a second pressure relief hole, 37 a connecting internal thread, 38 a second thread, 4 a one-way valve group, 41 a valve seat, 411 a valve seat cavity, 42 a spring seat, 421 a spring cavity, 422 a communication hole, 43 a compression spring, 44 a valve ball and 5 a sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Example 1

As shown in fig. 1, an oil pipe one-way temporary sealing device comprises a valve body 1, a back-off joint 2, a thimble joint 3 and a one-way valve group 4.

As shown in fig. 1, a valve body cavity 11 is axially formed on a valve body 1, a back-off connector 2 is arranged in the valve body cavity 11, a back-off cavity 21 is axially formed along the back-off connector 2, a connecting section 31 of a thimble connector 3 is connected in the back-off cavity 21 at one end of the back-off connector 2 through a first thread 33, and an extending section 32 of the thimble connector 3 extends to a check valve group 4 connected at the other end of the back-off connector 2 through the back-off cavity 21.

As shown in fig. 1, a thimble cavity 34 and a first pressure relief hole 35 are formed in the thimble connector 3, wherein the thimble cavity 34 is coaxially disposed in the connection section 31 of the thimble connector 3, the first pressure relief hole 35 communicates the thimble cavity 34 with the trip cavity 21, and the check valve set 4 controls the connection or disconnection between the trip cavity 21 and the valve body cavity 11.

In the present embodiment, the check valve group 4 includes a valve seat 41, a spring seat 42, a compression spring 43, and a valve ball 44. As shown in fig. 1, the valve seat 41 is coaxially disposed in the back-off cavity 21 of the back-off connector 2, the spring seat 42 is axially connected to the back-off connector 2, and cooperates with the back-off connector 2 to axially limit the valve seat 41, the valve seat cavity 411 is axially disposed on the valve seat 41, the spring seat 42 is axially disposed with a spring cavity 421 and a communication hole 422, the back-off cavity 21, the valve seat cavity 411 and the spring cavity 421 are sequentially axially communicated, the spring cavity 421 is communicated with the valve body cavity 11 through the communication hole 422, the valve ball 44 and the compression spring 43 are disposed in the spring cavity 421, one end of the compression spring 43 presses the spring seat 42, the other end presses the valve ball 44 against the valve seat 41 and blocks the valve seat cavity 411, and the extension section 32 of the thimble connector 3 passes through the valve seat cavity 411 and presses against the valve ball 44.

When the blowout preventer is used, one end of the valve body 1 close to the thimble connector 3 is connected to a wellhead hanger (not shown in the figure), one end of the valve body 1 far away from the thimble connector 3 is connected with a shaft oil pipe (not shown in the figure), and the check valve group 4 has a one-way sealing effect on pressurized well fluid in the shaft oil pipe, so that well control safety guarantee is provided for disassembling and assembling the blowout preventer and assembling a wellhead; after the wellhead is installed, the thimble joint 3 is rotated, under the rotating feed of the first thread 33, the thimble joint 3 extends into the reverse buckle joint 2, the extending section 32 of the thimble joint 3 presses against the valve ball 44, so that a gap is formed between the valve ball 44 and the valve seat 41, the valve seat cavity 411 and the spring cavity 421 are communicated, and pressurized well fluid in the shaft oil pipe flows into the thimble cavity 34 through the valve body cavity 11, the communicating hole 422, the spring cavity 421, the valve seat cavity 411, the reverse buckle cavity 21 and the first pressure relief hole 35 in sequence to realize pressure relief.

In order to further drain the well fluid decompressed in the thimble cavity 34, as shown in fig. 1, a plurality of second decompression holes 36 are radially formed on the thimble joint 3. The second pressure relief vent 36 may be connected to a wellhead large spool (not shown) to relieve well fluid to the surface pipeline flow path through a tubing gate.

As shown in fig. 1, a seal ring 5 is provided between the left-hand joint 2 and the valve body 1 to improve the sealing between the left-hand joint 2 and the valve body 1.

Example 2

In the case of a wellhead hanger connection at the end of the valve body 1 close to the thimble adapter 3, it is often inconvenient to rotate the thimble adapter 3, and in this embodiment, as shown in fig. 1, a connection female thread 37 is provided in the thimble cavity 34 at the end of the thimble adapter 3 remote from the projecting section 32.

When the thimble adapter 3 needs to be rotated, a control rod (not shown in the figure) connected with an external thread is arranged at the end part of the wellhead hanger, and is in threaded connection with the thimble adapter 3 through rotating the control rod, so that the thimble adapter 3 is driven to rotate by continuously rotating the control rod.

Example 3

As shown in fig. 1, a second thread 38 is provided between the stabbing joint 2 and the valve body 1. The reverse connection fitting 2 is disposed in the valve body chamber 11 of the valve body 1 via the second screw thread 38, and the second screw thread 38 is rotated in the opposite direction to the first screw thread 33.

It should be noted that, unless otherwise specified, the thread direction involved in the present invention is the same as the thread direction of the first thread 33 except for the second thread 38.

After the well fluid is decompressed, the thimble connector 3 is continuously rotated until the first thread 33 is screwed tightly, so that the left-hand thread connector 2 is driven to rotate, the left-hand thread connector 2 is gradually screwed off the valve body 1 because the screwing direction of the second thread 38 is opposite to that of the first thread 33, and the valve body 1 is finally taken out by the wellhead hanger, at the moment, the valve body 1 is kept between the wellhead hanger and the shaft oil pipe, and the inner drift diameter of the valve body cavity 11 can meet various subsequent production construction requirements in the shaft oil pipe.

Although fig. 1 is used in all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as parts or structural features missing in the embodiments are removed from the drawing. As will be clear to the skilled person. Of course, the embodiments with more components are only the preferred embodiments, and the embodiments with fewer components are the basic embodiments, but the basic objects of the invention can also be achieved, so that all the modified embodiments are within the protection scope of the present invention.

All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the terms "one embodiment," "some embodiments," "specific embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides an one-way temporary sealer of oil pipe, its characterized in that includes valve body, left-hand thread connects, thimble connects and check valve group axial sets up the valve body chamber on the valve body, left-hand thread connects the setting at the valve body intracavity, and it has the left-hand thread chamber to open along left-hand thread connects the axial, the linkage segment that the thimble connects is through the left-hand thread intracavity of first threaded connection at left-hand thread connects one end, and the section of stretching out that the thimble connects is worn to stretch to the check valve group of connection at the left-hand thread connects the other end through the left-hand thread chamber set up thimble chamber and first pressure release hole on the thimble connects, the coaxial setting in the linkage segment that the thimble chamber connects, first pressure release hole intercommunication thimble chamber and left-hand thread chamber, the intercommunication or the disconnection of check valve group control left-hand thread chamber and valve body chamber.

2. The oil pipe one-way temporary sealing device according to claim 1, wherein the check valve group comprises a valve seat, a spring seat, a compression spring and a valve ball, the valve seat is coaxially arranged in a back-off cavity of the back-off joint, the spring seat is axially connected with the back-off joint and is matched with the back-off joint to axially limit the valve seat, a valve seat cavity is axially formed in the valve seat, a spring cavity and a communication hole are axially formed in the spring seat, the back-off cavity, the valve seat cavity and the spring cavity are sequentially and axially communicated, the spring cavity is communicated with the valve body cavity through the communication hole, the valve ball and the compression spring are arranged in the spring cavity, one end of the compression spring compresses the spring seat, the other end of the compression spring compresses the valve ball on the valve seat, the valve seat cavity is sealed, and the extension section of the thimble joint penetrates through the valve seat cavity and is pressed on the valve ball.

3. The oil pipe one-way temporary sealing device according to claim 1, wherein a second thread is arranged between the back-off joint and the valve body, the back-off joint is arranged in the valve body cavity of the valve body through the second thread, and the turning direction of the second thread is opposite to that of the first thread.

4. The one-way temporary sealer of oil pipe according to claim 1, wherein a plurality of second pressure relief holes are radially formed on the thimble adapter.

5. The one-way temporary sealer of oil pipe according to claim 1, wherein a connection internal thread is provided in the thimble cavity at an end of the thimble adapter remote from the protruding section.

6. The one-way temporary sealer of oil pipe according to claim 1, wherein a sealing ring is arranged between the back-off connector and the valve body.

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