CN219220359U

CN219220359U - Multifunctional casing head blanking plug

Info

Publication number: CN219220359U
Application number: CN202320140627.1U
Authority: CN
Inventors: 彭艳敏; 谢彦甫; 李朝阳; 赵会涛; 管方龙
Original assignee: Puyang Haihua Petroleum Machinery Co ltd
Current assignee: Puyang Haihua Petroleum Machinery Co ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-06-20
Anticipated expiration: 2033-02-07

Abstract

The utility model relates to the technical field of downhole tools, in particular to a multifunctional casing head blanking plug. The tool comprises a tool body, wherein threaded female buckles are respectively arranged at the upper end and the lower end of the tool body, a plurality of pin shafts are uniformly distributed on the circumference of the middle part of the tool body, the pin shafts are detachably and fixedly connected with the tool body, a sealing ring is sleeved in a sealing ring groove at the lower end of the tool body, two sealing supports are sleeved on the tool body below the sealing ring, and an elastic metal sealing piece is sleeved on the tool body between the two sealing supports. According to the anti-wear sleeve, the detachable pin shafts are arranged on the middle section of the tool body, the pin shafts of different types can be replaced according to the types of the anti-wear sleeve, a special taking-out tool for the anti-wear sleeve is not required to be used when the anti-wear sleeve is taken out, construction is convenient, and working efficiency can be improved.

Description

Multifunctional casing head blanking plug

Technical Field

The utility model relates to the technical field of downhole tools, in particular to a multifunctional casing head blanking plug.

Background

In the oilfield drilling process, a blanking plug is used as a blanking tool when the drilling blowout preventer stack is tested for pressure. To perform tightness detection on the casing and the blowout preventer stack, a casing head plug is required, and the application of the casing head plug can improve the efficiency of performing tightness detection on the casing and the blowout preventer stack. Before using the blanking plug function, sometimes need take out the wear prevention cover in advance, wear prevention cover is taken out and need utilize the wear prevention cover to take out the instrument. The existing partial casing head plugging device is mainly sealed by means of a rubber sealing ring or a leather cup on the plugging device, and the phenomenon of cracking of stress concentration parts can occur under an ultrahigh pressure state, so that the sealing performance is not high.

Disclosure of Invention

The utility model aims to solve the technical problem that the multifunctional casing head blanking plug is convenient to take out the wear-resistant sleeve and can improve the sealing performance.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the utility model provides a multi-functional casing head blanking plug, including the instrument body, threaded box has all been seted up at the upper and lower both ends of instrument body, instrument body middle part circumference equipartition is provided with a plurality of round pins, round pin axle and instrument body detachable fixed connection, the sealing washer inslot of instrument body lower extreme is equipped with sealed rubber ring, the cover is equipped with two sealed supports on the instrument body of sealed rubber ring below, sealed support and instrument body sliding connection of below, the lantern ring has elastic metal sealing spare on the instrument body between two sealed supports, all be provided with the extrusion piece that is used for extrusion elastic sealing support and makes it expand on the terminal surface that two sealed supports are relative, instrument body lower extreme threaded connection has the pressure cap that blocks the sealed support of below.

Specifically, the tool body is provided with a small head section, a middle section and a big head section which are sequentially arranged from top to bottom, the diameters of the small head section, the middle section and the big head section are sequentially increased, and two threaded box buckles on the tool body are respectively arranged in the small head section and the big head section.

Specifically, the pin shaft is in threaded connection with the tool body, and the axis of the pin shaft is perpendicular to the axis of the tool body.

Specifically, the tool body below the sealing rubber ring is provided with a three-stage step, the sealing support above and the elastic metal sealing piece are sleeved on the first-stage step, the sealing support below is sleeved on the second-stage step, and the pressing cap is in threaded connection with the three-stage step and abuts against the sealing support below.

Specifically, the sealing support outer edge of below is processed to have the seat cover.

Specifically, the extrusion piece is a conical ring fixed on the sealing support, a conical groove corresponding to the conical ring is formed in the elastic metal sealing piece, and the conical ring is inserted into the conical groove at one side of the conical ring.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the anti-wear sleeve, the detachable pin shafts are arranged on the middle section of the tool body, the pin shafts of different types can be replaced according to the types of the anti-wear sleeve, a special taking-out tool for the anti-wear sleeve is not required to be used when the anti-wear sleeve is taken out, construction is convenient, and working efficiency can be improved.

2. Through set up the elastic metal sealing spare and can make the sealed support of elastic metal sealing spare inflation in tool body lower extreme, after the tool body pressurized descends, the sealed support inflation of elastic metal can improve the sealing performance of this tool body and casing head, and bearing capacity increases, and applicable higher pressure range.

Drawings

Fig. 1 is a cross-sectional view of the present utility model.

The names of the parts in the drawings are as follows:

1. sealing rubber rings; 2. sealing and supporting; 3. a resilient metal seal; 4. a tool body; 5. pressing the cap; 6. a thread box; 7. a pin shaft; 8. a seat cover; 9. a small head section; 10. an intermediate section; 11. a large head section.

Detailed Description

As shown in fig. 1, the multifunctional casing head blanking plug comprises a tool body 4, and threaded female buckles 6 are respectively arranged at the upper end and the lower end of the tool body 4. The tool body 4 is provided with a small head section 9, a middle section 10 and a big head section 11 which are sequentially arranged from top to bottom, the diameters of the small head section 9, the middle section 10 and the big head section 11 are sequentially increased, and two threaded box buckles 6 on the tool body 4 are respectively arranged in the small head section 9 and the big head section 11.

The circumference equipartition in the middle part of instrument body 4 is provided with a plurality of round pins 7, and round pin axle 7 can dismantle fixed connection with instrument body 4. When the anti-abrasion sleeve is required to be taken out, the threaded female buckle 6 at the lower end of the tool body 4 is in threaded connection with the drill rod, then the tool body 4 is placed into the position of the anti-abrasion sleeve through the rotating rod, and the anti-abrasion sleeve can be taken out after being matched with the clamping groove on the anti-abrasion sleeve by the pin shaft 7.

The pin shaft 7 is in threaded connection with the tool body 4, and the axis of the pin shaft 7 is perpendicular to the axis of the tool body 4. The pin shafts 7 with different types can be replaced according to the types of the wear-resistant sleeves to take out the wear-resistant sleeves, a special taking-out tool for the wear-resistant sleeves is not required to be used when the wear-resistant sleeves are taken out, construction is convenient, and working efficiency can be improved.

The sealing ring groove at the lower end of the tool body 4 is sleeved with a sealing rubber ring 1, the tool body 4 below the sealing rubber ring 1 is provided with three steps, the upper sealing support 2 and the elastic metal sealing element 3 are sleeved on the first step, the lower sealing support 2 is sleeved on the second step, and the pressing cap 5 is connected with the three steps in a threaded manner and abuts against the lower sealing support 2.

The opposite end faces of the two sealing supports 2 are provided with extrusion parts for extruding and expanding the elastic sealing supports 2. The extrusion part is a conical ring fixed on the sealing support 2, the elastic metal sealing part 3 is provided with a conical groove corresponding to the conical ring, and the conical ring is inserted into the conical groove at one side of the conical ring. The outer edge of the lower sealing support 2 is provided with a seat cover 8.

During drilling, when the wellhead sealing pressure needs to be tested, a proper pin shaft 7 is selected according to the type of the well anti-abrasion sleeve, the lower end of the tool body 4 is in threaded connection with the drill rod and the tool body is put into the anti-abrasion sleeve, the drill rod and the tool body 4 are rotated, the pin shaft 7 is clamped in a clamping groove of the anti-abrasion sleeve, then the drill rod and the tool body 4 are lifted, and the anti-abrasion sleeve is taken out.

When the tool is lowered into the well for the second time, the small end section 9 of the tool body 4 is connected with the drill rod and then enters the well, the seat cover 8 is seated on the inner step of the casing head, the drill rod can be connected to the threaded box 6 of the large end section 11 of the tool body 4, the pressure is formed by the self weight of the drill rod, the elastic metal sealing element 3 is extruded through the sealing support 2 below and expanded, and then the metal sealing is completed.

And when pressure is tested, the fluid can be pressurized and tested through a four-way valve or an upper drill rod. The tool body 4 descends after the pressure is increased, under the blocking effect of the inner step of the casing head on the sealing support 2 below, the conical rings of the two sealing supports 2 move into the conical grooves of the elastic metal sealing piece 3, and the elastic metal sealing piece 3 expands and deforms and is tightly attached to the inner wall of the casing head, so that the pressure bearing capacity of the tool body 4 and the casing head is improved. When the pressure is low, sealing is performed by the sealing rubber ring 1.

The tool body 4 is introduced with the elastic metal sealing element 3, and is sealed reliably under ultra-high pressure well conditions by means of deformation of the elastic metal sealing element 3. The tool body 4 can extract the wear-resistant sleeve, the pin shaft 7 is replaced according to the model of the wear-resistant sleeve, and various wear-resistant sleeves can be extracted. When the plug is used, the drill rod can be hung at the bottom for operation, and the time for lifting the drill rod is saved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The utility model provides a multi-functional casing head blanking plug, including instrument body (4), threaded box (6) have all been seted up at the upper and lower both ends of instrument body (4), a serial communication port, instrument body (4) middle part circumference equipartition is provided with a plurality of round pins (7), round pin axle (7) and instrument body (4) can dismantle fixed connection, the sealing washer endotheca of instrument body (4) lower extreme is equipped with sealed rubber ring (1), the cover is equipped with two sealed supports (2) on instrument body (4) of sealed rubber ring (1) below, sealed support (2) and instrument body (4) sliding connection of below, the lantern ring has elastic metal sealing piece (3) on the instrument body (4) between two sealed supports (2), all be provided with the extrusion piece that is used for extrudeing elastic sealing support (2) and make it expand on the terminal surface that two sealed supports (2) are relative, instrument body (4) lower extreme threaded connection has and carries out the pressure cap (5) that block to sealed support (2) of below.

2. The multifunctional casing head blanking plug according to claim 1, characterized in that the tool body (4) is provided with a small head section (9), a middle section (10) and a big head section (11) which are arranged from top to bottom in sequence, the diameters of the small head section (9), the middle section (10) and the big head section (11) are increased in sequence, and two threaded box buckles (6) on the tool body (4) are respectively arranged in the small head section (9) and the big head section (11).

3. The multifunctional casing head blanking plug according to claim 1, characterized in that the pin shaft (7) is in threaded connection with the tool body (4), and the axis of the pin shaft (7) is perpendicular to the axis of the tool body (4).

4. The multifunctional casing head blanking plug of claim 1, wherein a three-stage step is machined on the tool body (4) below the sealing rubber ring (1), the upper sealing support (2) and the elastic metal sealing piece (3) are sleeved on the first-stage step, the lower sealing support (2) is sleeved on the second-stage step, and the pressing cap (5) is in threaded connection with the three-stage step and abuts against the lower sealing support (2).

5. A multifunctional casing head blanking plug according to claim 1, characterized in that the outer edge of the lower sealing support (2) is provided with a seat cover (8).

6. The multifunctional casing head blanking plug of claim 1, wherein the extrusion is a conical ring fixed on the sealing support (2), a conical groove corresponding to the conical ring is formed on the elastic metal sealing piece (3), and the conical ring is inserted into the conical groove at one side of the conical ring.