CN220748213U - Multiple excitation sealing mechanism and hanger for casing head - Google Patents

Abstract

The utility model discloses a multi-excitation sealing mechanism for a casing head and a hanger, which belong to the technical field of hanger sealing, and comprise a pipe column, a pipe body and a ring groove arranged on the outer wall of the pipe body; the excitation part comprises a casing head arranged outside a pipe body, a dead weight excitation assembly arranged inside the casing head and a mechanical excitation assembly arranged above the casing head, wherein the mechanical excitation assembly is arranged above the dead weight excitation assembly, when the dead weight of the pipe body is enough to realize sealing, the mechanical excitation assembly is not needed, when the sealing can not be realized only by the dead weight of a pipe column with smaller load, the arc-shaped pressing plate can form extrusion on the supporting ring through tightening the inner hexagon bolt, so that the effect of secondary sealing is realized, the jackscrew is tightened, the multiple excitation sealing is formed through extrusion of the jackscrew to the arc-shaped pressing plate, and the safety and the reliability of the sealing are ensured.

Description

Multiple excitation sealing mechanism and hanger for casing head

Technical Field

The utility model relates to the technical field of hanger sealing, in particular to a multi-excitation sealing mechanism for a casing head.

Background

The hanger is one of the important components of the casing head for hanging the annulus between the string and the casing string.

Common hanger seal types are the self-weight activated seal and the mechanically activated seal of the pipe string, but both activated seals cannot be achieved at the same time, and thus problems are often encountered. When the sealing cannot be realized by only relying on the self weight of the pipe column with smaller load, if the sealing cannot be timely and mechanically excited, the next operation of the oil field can be influenced, and immeasurable loss is caused. The mechanical excitation sealing is convenient to operate without dead weight excitation sealing, and is time-consuming and labor-consuming. And the operation is inconvenient when changing the sealing member, and efficiency is lower.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the utility model, which should not be used to limit the scope of the utility model.

The utility model is provided in view of the problem that when the sealing cannot be realized by only relying on the self weight of a pipe column with smaller load, the sealing cannot be timely and mechanically excited, the next operation of an oil field is affected, and immeasurable loss is caused.

Accordingly, it is an object of the present utility model to provide a multiple shot sealing mechanism for a casing head that aims at: the two excitation seals are used simultaneously.

In order to solve the technical problems, the utility model provides the following technical scheme: the multi-excitation sealing mechanism for the casing head comprises a pipe column, a casing body and a ring groove arranged on the outer wall of the casing body; the excitation component comprises a casing head arranged outside the pipe body, a dead weight excitation assembly arranged inside the casing head, and a mechanical excitation assembly arranged on the casing head, wherein the mechanical excitation assembly is arranged above the dead weight excitation assembly.

As a preferred embodiment of the multi-excitation sealing mechanism for casing head according to the present utility model, the multi-excitation sealing mechanism comprises: the self-weight excitation assembly comprises slip teeth arranged outside the pipe body, saw teeth arranged on one side of the slip teeth close to the pipe body, and mounting grooves arranged on one side of the slip teeth away from the pipe column, wherein multiple groups of slip teeth are arranged.

As a preferred embodiment of the multi-excitation sealing mechanism for casing head according to the present utility model, the multi-excitation sealing mechanism comprises: the mechanical excitation assembly comprises a primary excitation piece arranged above the slip teeth and a secondary excitation piece arranged inside the casing head, wherein the primary excitation piece and the secondary excitation piece can be independently excited and also excited together.

As a preferred embodiment of the multi-excitation sealing mechanism for casing head according to the present utility model, the multi-excitation sealing mechanism comprises: the primary excitation piece comprises a supporting ring arranged in the casing head, a sealing ring arranged on the supporting ring, a pressing ring arranged on the sealing ring, and an inner hexagon bolt arranged on the pressing ring, and a first shoulder is arranged at the lower part of the supporting ring.

As a preferred embodiment of the multi-excitation sealing mechanism for casing head according to the present utility model, the multi-excitation sealing mechanism comprises: the secondary excitation piece comprises a jackscrew arranged in the casing head, a wire hole formed in the casing head and matched with the jackscrew, the wire hole penetrates through the casing head to the inside, and the jackscrew is in butt joint with the pressing ring.

As a preferred embodiment of the multi-excitation sealing mechanism for casing head according to the present utility model, the multi-excitation sealing mechanism comprises: the pressing ring comprises three arc pressing plates, and each arc pressing plate is fixed by two inner hexagon bolts.

The utility model has the beneficial effects that: when the dead weight of the pipe body is enough to realize sealing, a mechanical excitation assembly is not needed, when sealing can not be realized by only relying on the dead weight of the pipe column with smaller load, the arc pressing plate is extruded on the supporting ring by screwing the inner hexagonal bolt, so that the effect of secondary sealing is realized, the jackscrew is screwed, multiple excitation sealing is formed by extruding the jackscrew on the arc pressing plate, and the sealing safety and reliability are ensured.

The utility model is provided in view of the problems of inconvenient operation and low efficiency when the sealing element is replaced in the conventional multi-excitation sealing mechanism for the casing head.

Accordingly, it is an object of the present utility model to provide a hanger which aims at: the hanger is convenient for a worker to check and replace.

In order to solve the technical problems, the utility model provides the following technical scheme: the hanger comprises a slip shell arranged in the casing head, a locking block arranged in the slip shell, a pin shaft arranged in the locking block and a lifting rope arranged on the arc-shaped pressing plate.

As a preferred embodiment of the multi-excitation sealing mechanism for casing head according to the present utility model, the multi-excitation sealing mechanism comprises: the slip shell is of a split type design, a limit ring matched with an installation groove on the slip teeth is arranged on the inner wall of the slip shell, fixing bolts are arranged on the outer wall of the slip shell, one ends of the fixing bolts are in butt joint with the slip teeth, the number of the fixing bolts corresponds to that of the slip teeth, locking blocks are arranged in grooves matched with the locking blocks and formed in the outer portion of the slip shell, pin shafts penetrate through the surfaces of the locking blocks, two ends of the pin shafts are movably arranged in the slip shell, and two groups of pin shafts are arranged.

As a preferred embodiment of the multi-excitation sealing mechanism for casing head according to the present utility model, the multi-excitation sealing mechanism comprises: the lifting rope is characterized in that fixing rings are fixedly connected to two ends of the lifting rope, fastening bolts are arranged on the fixing rings, and the fastening bolts are in threaded connection with the arc-shaped pressing plates.

As a preferred embodiment of the multi-excitation sealing mechanism for casing head according to the present utility model, the multi-excitation sealing mechanism comprises: the outer wall of the slip shell is of a smooth design, a second shoulder is arranged at the lower part of the slip shell, and a first shoulder groove and a second shoulder groove matched with the first shoulder and the second shoulder are formed in the casing head.

The utility model has the beneficial effects that: through the design of two circular bead, prevent the risk of hanger and tubular column landing together, compact structure, firm in connection is reliable bearing capacity is big, and is high pressure resistant, through splitting the slip shell, setting is in locking piece in the slip shell to and the cooperation between the round pin axle, make the slip shell can freely open and merge, make things convenient for the staff to inspect and maintain the hanger, promote work efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic diagram of the overall structure of a multi-excitation sealing mechanism for a casing head according to the present utility model.

FIG. 2 is a schematic illustration of a partial structure of a tubing string of a multi-shot sealing mechanism for a casing head according to the present utility model.

FIG. 3 is a schematic illustration of the energizing components of a multiple energizing seal mechanism for a casing head according to the present utility model.

FIG. 4 is a schematic illustration of the construction of slip bowl of a multi-shot sealing mechanism for a casing head according to the present utility model.

FIG. 5 is a schematic diagram of a secondary excitation member of a multi-excitation seal mechanism for a casing head according to the present utility model.

Fig. 6 is a schematic view of the construction of a slip housing of a hanger according to the present utility model.

Fig. 7 is an enlarged view of the structure of fig. 3a according to the present utility model.

Fig. 8 is a schematic view of a first shoulder groove of a hanger according to the present utility model.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Further, in describing the embodiments of the present utility model in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present utility model. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

Example 1

Referring to fig. 1, in a first embodiment of the present utility model, there is provided a multi-excitation sealing mechanism for casing head, the apparatus includes a pipe column 100, including a pipe body 101, and a ring groove 102 disposed on an outer wall of the pipe body 101, where the ring groove 102 is used to increase friction force of contact, so as to ensure fixation of the pipe body 101;

excitation part 200, including set up in the outside casing head 201 of body 101, set up in the inside dead weight excitation subassembly 202 of casing head 201 to and set up in the mechanical excitation subassembly 203 of casing head 201, mechanical excitation subassembly 203 sets up in the top of dead weight excitation subassembly 202, and dead weight excitation subassembly 202 and mechanical excitation subassembly 203 can stimulate alone also can stimulate simultaneously, form the sealed effect of multiple excitation.

Further, the self-weight excitation assembly 202 comprises slip teeth 202a arranged outside the pipe body 101, saw teeth 202b arranged on one side, close to the pipe body 101, of the slip teeth 202a, the saw teeth 202b are used for being in friction contact with the ring groove 102 on the outer wall of the pipe body 101 to fix the pipe body 101, and mounting grooves 202c arranged on one side, far away from the pipe column 100, of the slip teeth 202a, the mounting grooves 202c are used for mounting and limiting the slip teeth 202a, the slip teeth 202a are provided with a plurality of groups, and the pipe body 101 is held by the cooperation of the slip teeth 202a, so that the pipe body 101 is held by holding, and a seal is formed.

In the use process, when the pipe column 100 needs to be used for sealing and hanging, the pipe body 101 is surrounded by the cooperation of the plurality of groups of slip teeth 202a, the saw teeth 202b arranged on the slip teeth 202a are meshed with the ring grooves 102, the pipe body 101 is released, and the pipe body 101 and the slip teeth 202a form a surrounding seal through self gravity.

Example 2

Referring to fig. 1, a second embodiment of the present utility model is shown, which is different from the first embodiment in that: when the self-weight excitation sealing is insufficient for supporting the sealing, multiple excitation sealing is formed through mechanical excitation, so that the sealing effect and the safety are improved.

Further, in comparison to embodiment 1, the mechanical excitation assembly 203 comprises a primary excitation member 203a disposed above the slip bowl 202a, and a secondary excitation member 203b disposed within the casing head 201, wherein the primary excitation member 203a and the secondary excitation member 203b may be excited separately or together.

The primary excitation member 203a comprises a support ring 203a-1 arranged in the casing head 201, a sealing ring 203a-2 arranged on the support ring 203a-1, a pressing ring 203a-3 arranged on the sealing ring 203a-2, and an inner hexagon bolt 203a-4 arranged on the pressing ring 203a-3, wherein a first shoulder 203a-5 is arranged at the lower part of the support ring 203a-1, the support ring 203a-1 is used for supporting the sealing ring 203a-2, the pressing ring 203a-3 compresses the sealing ring 203a-2, the support ring 203a-1, the sealing ring 203a-2 and the pressing ring 203a-3 are sequentially stacked on the upper part of the slip casing and penetrate into the bolt hole through the inner hexagon bolt, and are fixed through threaded connection with the slip casing, so that the use condition of the primary excitation member 203a is achieved.

The secondary excitation member 203b comprises a jackscrew 203b-1 arranged in the casing head 201 through threads, and a thread hole 203b-2 formed in the casing head 201 and matched with the jackscrew 203b-1, wherein the thread hole 203b-2 penetrates through the casing head 201 to the inside, the jackscrew 203b-1 is abutted with the pressing ring 203a-3, and the sealing performance is further improved and the pipe 101 is surrounded and fixed through the extrusion of the jackscrew 203b-1 to the pressing ring 203 a-3.

The pressing ring 203a-3 includes three arc pressing plates 203a-3a, the three arc pressing plates 203a-3a are combined to form a circle, an encircling effect is generated on the pipe body 101, and the pressing ring is convenient to disassemble and assemble, each arc pressing plate 203a-3a is fixed by two hexagon socket head cap bolts 203a-4, and the two hexagon socket head cap bolts 203a-4 can prevent the arc pressing plates 203a-3a from deviating from a hard sealing effect.

In the use process, when the dead weight of the pipe body 101 is insufficient to support the sealing condition, the inner hexagon bolt 203a-4 is screwed, at the moment, the inner hexagon bolt 203a-4 is screwed, the supporting ring 203a-1 and the pressing ring 203a-3 squeeze the sealing ring 203a-2, at the moment, the sealing ring 203a-2 deforms, the annular space between the pipe body 101 and the casing head 201 is filled, a secondary sealing effect is formed, the sealing performance is improved, at the moment, the jackscrew 203b-1 is screwed, and the jackscrew 203b-1 extrudes the arc-shaped pressing plate 203a-3a, so that the position of the arc-shaped pressing plate 203a-3a is kept stable, the structure is more compact, and the sealing effect and the safety performance are further improved.

The rest of the structure is the same as that of embodiment 1.

Example 3

Referring to fig. 1, a third embodiment of the present utility model is shown, which differs from the second embodiment in that:

compared with embodiment 2, further, a hanger comprises a slip housing 300 arranged in a casing head 201 and used for installing slip teeth 202a and strengthening the fixing effect of a pipe body 101, a locking block 400 arranged in the slip housing 300 and a pin shaft 500 arranged in the locking block 400, wherein the locking block 400 and the pin shaft 500 are used for moving the slip housing 300, so that maintenance is convenient, and a lifting rope 600 is arranged on an arc-shaped pressing plate 203a-3a, and the lifting rope 600 is used for moving and installing the hanger.

The slip housing 300 is of a split design, the inner wall of the slip housing 300 is provided with a limit ring 301 matched with a mounting groove 202c on the slip bowl 202a, the limit ring 301 is used for mounting the slip bowl 202a, the slip bowl 202a can be slidably mounted in the slip housing 300, operation is convenient, the outer wall of the slip housing 300 is provided with fixing bolts 302, one ends of the fixing bolts 302 are abutted against the slip bowl 202a, the number of the fixing bolts 302 corresponds to that of the slip bowl 202a, the fixing bolts 302 are used for fixing the slip bowl 202a, the lock block 400 is arranged in a groove matched with the lock block 400 and formed in the outer portion of the slip housing 300, the two ends of the lock block 400 penetrate through the surface of the lock block 400, the two ends of the lock block 500 are movably arranged in the slip housing 300, and the lock block 500 is provided with two groups.

Wherein, the both ends fixedly connected with solid fixed ring 601 of lifting rope 600 is provided with fastening bolt 602 on the solid fixed ring 601, and fastening bolt 602 and arc clamp plate 203a-3a threaded connection solid fixed ring 601 are used for propping up solid bolt to the fixed of lifting rope 600, strengthen the fastening effect of fastening bolt 602 to lifting rope 600, promote the security when removing the hanger.

The outer wall of the slip housing 300 is of a smooth design, so that the slip housing 300 is convenient to sit and hang in the casing head 201, a second shoulder 303 is arranged at the lower part of the slip housing 300, a first shoulder groove 304 and a second shoulder groove 305 matched with the first shoulder 203a-5 and the second shoulder 303 are formed in the casing head 201, and the risk that the hanger and the pipe body 101 slide down together is further avoided through a double-step design.

In the use process, when the hanger is required to be installed, the lock block 400 is installed in the groove of the slip shell 300, and the pin shaft 500 penetrates through the holes of the slip shell 300 and the lock block 400 to form a hinge point; each cut slip tooth 202a is placed into the slip shell 300 in sequence, and the slip tooth 202a is fixed by penetrating through a hole in the slip shell 300 through a fixing bolt 302 and being in threaded connection with the slip tooth 202a; aligning the bolt holes, sequentially stacking the support ring 203a-1, the sealing ring 203a-2 and the pressing ring 203a-3 on the upper part of the slip housing 300, penetrating the bolt holes by using the hexagon socket head cap bolts 203a-4, and fixing the parts by being in threaded connection with the slip housing 300; the lifting rope 600 is connected to the upper part of the pressing ring 203a-3 through threads, the jackscrew 203b-1 is connected to the casing head 201 through threads, two supporting tools are placed on the upper part of the casing head 201 and used for supporting the hanger, the hanger is held by grabbing a screw, the tubular column 100 is held by holding the hanger, the hanger is closed, the lifting rope 600 is hung, the supporting tools are removed, the hanger is slowly lowered to the seating and hanging shoulder of the casing head 201, the pipe body 101 is released to excite the seal, and the seal can also be simultaneously excited through tightening the hexagon socket head cap screw and screwing the jackscrew 203 b-1.

The rest of the structure is the same as that of embodiment 2.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (10)

1. The utility model provides a multiple excitation sealing mechanism for casing head which characterized in that: comprising the steps of (a) a step of,

the pipe column (100) comprises a pipe body (101) and a ring groove (102) arranged on the outer wall of the pipe body (101);

the excitation component (200) comprises a casing head (201) arranged outside the pipe body (101), a dead weight excitation assembly (202) arranged inside the casing head (201), and a mechanical excitation assembly (203) arranged on the casing head (201), wherein the mechanical excitation assembly (203) is arranged above the dead weight excitation assembly (202).

2. The multiple-shot sealing mechanism for a casing head of claim 1, wherein: the self-weight excitation assembly (202) comprises slip teeth (202 a) arranged outside the pipe body (101), saw teeth (202 b) arranged on one side, close to the pipe body (101), of the slip teeth (202 a), and mounting grooves (202 c) arranged on one side, far away from the pipe column (100), of the slip teeth (202 a), wherein multiple groups of slip teeth (202 a) are arranged.

3. The multiple-shot sealing mechanism for a casing head according to claim 2, wherein: the mechanical excitation assembly (203) comprises a primary excitation piece (203 a) arranged above the slip teeth (202 a) and a secondary excitation piece (203 b) arranged inside the casing head (201), wherein the primary excitation piece (203 a) and the secondary excitation piece (203 b) can be excited independently and also together.

4. A multiple-shot sealing mechanism for a casing head according to claim 3, wherein: the primary excitation piece (203 a) comprises a supporting ring (203 a-1) arranged in the casing head (201), a sealing ring (203 a-2) arranged on the supporting ring (203 a-1), a pressing ring (203 a-3) arranged on the sealing ring (203 a-2), and an inner hexagon bolt (203 a-4) arranged on the pressing ring (203 a-3), wherein a first shoulder (203 a-5) is arranged at the lower part of the supporting ring (203 a-1).

5. A multiple-shot sealing mechanism for a casing head according to claim 3, wherein: the secondary excitation piece (203 b) comprises a jackscrew (203 b-1) arranged inside the casing head (201), and a wire hole (203 b-2) which is formed inside the casing head (201) and matched with the jackscrew (203 b-1), wherein the wire hole (203 b-2) penetrates through the casing head (201) to the inside, and the jackscrew (203 b-1) is abutted with the pressing ring (203 a-3).

6. The multiple-shot sealing mechanism for a casing head of claim 4, wherein: the pressing ring (203 a-3) comprises three arc-shaped pressing plates (203 a-3 a), and each arc-shaped pressing plate (203 a-3 a) is fixed by two hexagon socket head cap bolts (203 a-4).

7. A hanger, characterized by: a multiple excitation sealing mechanism for a casing head comprising the multiple excitation sealing mechanism for a casing head (201) as claimed in claim 6, further comprising a slip housing (300) disposed inside the casing head (201), a lock block (400) disposed inside the slip housing (300), a pin shaft (500) disposed inside the lock block (400), and a lifting rope (600) disposed on the arc-shaped pressing plate (203 a-3 a).

8. The hanger of claim 7, wherein: the slip housing (300) is of a split type design, the inner wall of the slip housing (300) is provided with a limit ring (301) matched with a mounting groove (202 c) on the slip teeth (202 a), the outer wall of the slip housing (300) is provided with fixing bolts (302), one ends of the fixing bolts (302) are abutted to the slip teeth (202 a), the number of the fixing bolts (302) corresponds to the number of the slip teeth (202 a), the locking blocks (400) are arranged in grooves which are formed in the outer portion of the slip housing (300) and are matched with the locking blocks (400), the pin shafts (500) penetrate through the surfaces of the locking blocks (400), the two ends of the pin shafts (500) are movably arranged in the slip housing (300), and the pin shafts (500) are provided with two groups.

9. The hanger according to claim 8, wherein: the two ends of the lifting rope (600) are fixedly connected with fixing rings (601), fastening bolts (602) are arranged on the fixing rings (601), and the fastening bolts (602) are in threaded connection with the arc-shaped pressing plates (203 a-3 a).

10. A hanger according to claim 7 or 8, wherein: the outer wall of the slip housing (300) is of a smooth design, a second shoulder (303) is arranged at the lower part of the slip housing (300), and a first shoulder groove (304) and a second shoulder groove (305) which are matched with the first shoulder (203 a-5) and the second shoulder (303) are formed in the casing head (201).