CN217703240U - Packing adding device for oil pumping motor-pumped well - Google Patents

Abstract

The utility model belongs to rod-pumped well packing is maintained and is used the device field, especially relates to a rod-pumped well adds packing device, and rod-pumped well adds packing device includes structurally independent rotator and setting element each other, and the rotator includes barrel and the overhanging structure for terminal surface downwardly overhanging under the barrel, and the external diameter of barrel and the external diameter adaptation of packing box, overhanging structure be the vertical arc structure that extends of the central axis and terminal surface are the helicoid down, on the barrel in packing entry has been seted up to the top end department of helicoid, the rotator is for the structure of components of a whole that can function independently in week and can rotate for the polished rod, has between each components of a whole that can function independently part and connect locking structure, and the setting element is used for fixing on the polished rod of rod-pumped well to upwards drunkenness when preventing the rotator to rotate with the up end stop cooperation of rotator, should add packing device can cooperate with different rod-pumped well, and be convenient for the maintenance.

Description

Packing adding device for oil pumping motor-pumped well

Technical Field

The utility model belongs to the device field is used in the maintenance of beam-pumping unit well packing, especially relates to a beam-pumping unit well adds packing device.

Background

The packing is arranged between a polish rod and a packing box of the pumping well to realize sealing, and the dismantling of an old packing and the installation of a new packing can be related to the maintenance of the pumping well. Because the space between polished rod and the packing box is comparatively narrow and small, consequently, in order to realize the convenient packing of packing, prior art can design corresponding packing device that adds.

If the publication number is CN211851742U, the publication date is the China utility model patent of 2020, 11, 03, disclose a packing box, compare in traditional packing box, the packing box that this patent document discloses includes the rotator, the packing box body and presses the cap, the rotator includes top cap and first barrel, the one end fixed connection of top cap and first barrel, first unthreaded hole has on top cap and the first barrel, the packing entry has on the lateral wall of first unthreaded hole, the one end of pressing the cap and the one end fixed connection of packing box body, the other end is rotationally connected with the top cap, the lower extreme of first barrel sets up the heliciform groove. When the packing box is used, a packing to be installed is installed through the packing inlet, then the rotating body is rotated, and the packing is pressed into the packing box through the spiral groove by the rotating body. The packing box can be conveniently assembled, but the structure is more complex compared with the traditional packing box, the production and manufacturing cost is higher, and the production and manufacturing cost is increased when each oil pumping well is provided with the packing box.

Chinese utility model patent that the bulletin number is CN201437702U, the bulletin date of authority is 2010 04 month 14 days discloses a pumping unit well head packing adds the ware, and this packing adds the ware and includes pressing the cap, presses the cap lower extreme to have and is used for the internal thread of being connected with the packing box, and the rotator is installed to upper end circumference rotatable, axial positioning ground, presses cap and rotator to have the polished rod entry, and the rotator lower extreme has the heliciform groove. When the packing box is used, the packing loader is installed on a polish rod of an oil pumping well through a polish rod inlet, the pressing cap is connected with a packing box of the oil pumping well, a packing is sent into the packing box through the polish rod inlet, then the rotating body is rotated, and the packing is pressed into the packing box through the spiral groove at the lower end of the rotating body. Such packing adds ware has solved packing box self and has had the packing to add the technical problem that manufacturing cost is high that the structure leads to, but this packing adds the rotator of ware and installs the assembly body that forms linking firmly on pressing the cap undetachably, when the maintenance need be changed in one of them wearing and tearing of appearance of the two, it is comparatively troublesome to change the maintenance.

Therefore, there is a need for a pumping well packing device that does not cause an increase in production costs and is easy to maintain.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rod-pumped well adds packing device to solve among the prior art rod-pumped well and can't satisfy the technical problem that neither can lead to manufacturing cost to rise but easy maintenance's requirement again.

In order to achieve the above object, the utility model provides an oil pumping motor-pumped well adds packing device's technical scheme is:

a packing adding device for an oil pumping well comprises a rotating body and a positioning piece which are structurally independent, wherein the rotating body comprises a barrel body and an overhanging structure which is positioned on the inner side of the lower end face of the barrel body and overhangs downwards relative to the lower end face of the barrel body, the outer diameter of the barrel body is matched with the outer diameter of a packing box of the oil pumping well, the lower end face of the barrel body can be in stop fit with the upper end face of the packing box, the overhanging structure is an arc-shaped structure with a vertically extending central axis, the lower end face of the overhanging structure is a spiral face, the overhanging structure can extend into an annular space defined by the packing box and a polished rod of the oil pumping well, a packing inlet is formed in the uppermost end of the spiral face on the barrel body, the rotating body is of a circumferentially split structure, the inner wall of the barrel body and the inner wall of the overhanging structure are in clearance fit with the polished rod of the oil pumping well, a connecting and locking structure is arranged between split parts, the rotating body can be locked on the polished rod of the oil pumping well in a buckling mode, the positioning piece is used for being fixed on the polished rod of the oil pumping well, and is in stop fit with the upper end face of the rotating body, and the positioning piece, and the rotating body can prevent the rotating body from moving upwards in a stop fit with the upper end face.

The beneficial effects are that: when the packing adding device is used, the rotating body and the positioning piece are locked and installed on a polish rod of a pumping well, after the installation is completed, a barrel body of the rotating body is supported on a packing box of the pumping well through the lower end face of the barrel body, the overhanging structure is inserted into an annular space defined by the packing box and the polish rod, the positioning piece is in blocking fit with the upper end of the rotating body, a packing enters a cavity defined by the polish rod, the packing box and the overhanging structure of the pumping well from a packing inlet, the rotating body is rotated, and under the blocking positioning action of the positioning piece, the rotating body cannot move upwards, so that the rotating body can apply downward pressure to the packing through a spiral face of the overhanging structure, and the packing is pressed into the packing box.

As a further improvement, the inner wall of the lower end of the cylinder body is provided with a convex structure, the convex structure is provided with a part which extends downwards to the lower end face of the cylinder body, and the part forms the overhanging structure.

The beneficial effects are that: the protruding structure arranged on the inner wall of the barrel body extends downwards to form a suspension structure, the protruding structure increases the radial distance between the inner wall of the barrel body and the polished rod of the pumping well, so that a larger interval is formed between the inner wall of the barrel body above the protruding structure and the polished rod of the pumping well, the probability of friction between the barrel body and the polished rod of the pumping well when the rotating body rotates is reduced, and the polished rod of the pumping well is protected.

As a further improvement, the bulge structure also comprises an annular flange positioned on the inner wall of the cylinder body.

The beneficial effects are that: the annular flange is matched with a polished rod of the pumping well, so that the rotating body is ensured to have a stable posture during rotation.

As a further improvement, the positioning element is cylindrical, the upper section of the cylindrical positioning element is a thick-wall section, the lower section of the cylindrical positioning element is a thin-wall section, so that the outer wall surface of the positioning element is a step surface, the thin-wall section is used as a liner tube and is in plug-in fit with the cylinder of the rotating body, a protection structure is formed between the polished rod of the rod-pumped well and the rotating body, the lower end surface of the thick-wall section is in stop fit with the rotating body, the positioning element is of a split structure in the circumferential direction, and the thick-wall section is provided with a connecting and locking structure, so that the positioning element can be locked and locked on the polished rod of the rod-pumped well in a buckling manner.

The beneficial effects are that: the positioning piece blocks and positions the rotating body through the thick-wall section, and meanwhile, the thin-wall section serves as a lining to perform isolation protection between the rotating body and the polished rod of the pumping well, so that the polished rod of the pumping well is protected.

As a further improvement, the positioning piece is divided into two parts, one side of the thick-wall section of each of the two parts is connected through a second hinge, the other side of the thick-wall section of each of the two parts is fixed through a threaded fastener, and the second hinge and the threaded fastener form a connecting and locking structure of the positioning piece.

The beneficial effects are that: the hinge and the threaded fastener are matched to form the connecting and locking structure, so that the structure of the connecting and locking structure is simple and convenient to manufacture.

As a further improvement, a threaded hole is formed in the thick wall section of one split part of the positioning piece, a fixing hole is formed in the thick wall section of the other split part of the positioning piece, and screws or bolts are arranged in the fixing holes in a penetrating mode to be matched with the threaded holes to achieve locking of the two split parts of the positioning piece.

The beneficial effects are that: the screw hole is directly processed out on thick wall section, need not to set up the nut to screw or bolt for the structure of rod-pumped well with packing device is simple as far as possible.

As a further improvement, the spiral surface extends upwards to a position above the lower end face of the barrel, and the vertical distance between the top end of the spiral surface and the lower end face of the barrel is not smaller than the vertical size of the packing to be added.

The beneficial effects are that: the helicoid upwards extends to position department more than the terminal surface under the barrel and makes the packing get into the polished rod of beam-pumping unit well, the upside that is located the packing box of beam-pumping unit well when the space that the overhang structure and packing box enclose, avoids the in-process that the packing was added to produce too big wearing and tearing.

As a further improvement, the rotating body is divided into two parts, one side of the two parts is connected through a second hinge, and the other side of the two parts is locked through a bolt-nut assembly.

The beneficial effects are that: the hinge and the bolt and nut assembly are matched to form the connecting and locking structure of the rotating body, so that the connecting and locking structure is simple and convenient to manufacture.

As a further improvement, the overhanging structures are distributed over at least two body segments of the rotating body.

The beneficial effects are that: the overhanging structure is distributed on the two body parts of the rotating body, so that the overhanging structure has larger size in the axial direction, and the packing is pressed down more reliably.

As a further improvement, the rotating body is provided with an urging structure for an operator to apply a rotational driving force to the rotating body.

The beneficial effects are that: the force application structure is arranged, so that an operator can apply rotation driving force to the rotating body, and the use convenience of the oil pumping well packing device is improved.

Drawings

FIG. 1 is a diagram showing a state of the packing device of the embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a rotary body in an embodiment 1 of the apparatus for adding a packing to a middle rod-pumped well according to the present invention in a closed state;

fig. 3 is a schematic structural view of the packing device for a central rod-pumped well according to the embodiment 1 of the present invention when the rotating body is in an open state;

fig. 4 is a schematic structural view of a positioning member of embodiment 1 of the packing device for a middle rod-pumped well of the present invention in a closed state;

fig. 5 is a schematic structural view of the positioning member of embodiment 1 of the device for installing a packing in a middle pumping well according to the present invention in an open state.

Description of reference numerals:

1. a packing box; 2. a polish rod; 3. packing; 4. a rotating body; 41. a first half cylinder; 42. a second half drum; 43. a first hinge; 44. locking the ear plate; 45. a locking hole; 46. a bolt and nut assembly; 47. an annular flange; 48. a cantilevered structure; 49. a helicoid; 410. a packing inlet; 411. the lower end surface of the cylinder body; 412. a handle; 5. a positioning member; 51. a thick wall section; 52. a thin-walled section; 53. a second hinge; 54. a threaded hole; 55. a fixing hole; 56. and (4) screws.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the language "comprising one of 8230; \8230;" etc. does not exclude a process, method or the like that comprises such an element.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" as may be used herein are to be construed broadly, e.g., as being fixed or releasably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be connected internally or indirectly to each other. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The present invention will be described in further detail with reference to examples.

The utility model provides a rod-pumped well adds packing device's embodiment 1:

as shown in fig. 1, the wellhead equipment of the rod-pumped well comprises a packing box 1 and a polished rod 2, wherein the polished rod 2 passes through the packing box 1, a packing 3 is arranged in an annular space enclosed by the packing box 1 and the polished rod 2 for sealing, and the packing 3 in the packing box needs to be replaced after working for a period of time due to the sliding fit of the packing 3 and the polished rod 2. In order to conveniently install a new packing 3 into a packing box, a pumping well packing device is correspondingly arranged and comprises a rotating body 4 and a positioning part 5.

As shown in fig. 2 and 3, the rotating body 4 includes a cylindrical body and a suspended structure. Specifically, the rotating body 4 is a split structure split in the circumferential direction, and therefore, the cylinder body is divided into a first half cylinder 41 and a second half cylinder 42, and the first half cylinder 41 and the second half cylinder 42 are connected by a first hinge 43. In order to lock the first half-cylinder 41 and the second half-cylinder 42 after the first half-cylinder 41 and the second half-cylinder 42 are closed, a locking lug plate 44 is arranged at one end of the first half-cylinder 41 and the second half-cylinder 42 away from the first hinge 43, a locking hole 45 is formed in the locking lug plate 44, and after the first half-cylinder 41 and the second half-cylinder 42 are closed, the two half-cylinders are locked through a bolt-nut assembly 46 matched with the locking hole 45. The lower end face of the barrel is used for being matched with the upper end face of the packing box 1 in a blocking mode. The inner wall of the lower end of the cylinder is provided with a convex structure, as shown in fig. 3, the convex structure comprises an annular flange 47, the circumferential upper part of the annular flange 47 extends downwards to below the lower end surface 411 of the cylinder, the part extending to below the lower end surface 411 of the cylinder forms an overhanging structure 48, and the lower end surface of the overhanging structure is a spiral surface 49.

When the packing box is used, the rotating body 4 is buckled and locked on the polish rod 2 of the rod-pumped well, the inner walls of the barrel body and the protruding structures are in clearance fit with the polish rod 2, so that the rotating body 4 can rotate relative to the polish rod 2, after the packing box is installed, the lower end face 411 of the barrel body is in stop fit with the upper end face of the packing box 1, the suspending and extending structure 48 extends into an annular space defined by the packing box 1 and the polish rod 2, and therefore when the rotating body 4 rotates in the spiral rising direction of the spiral face 49, the spiral face 49 can apply pressure to the packing 3, and the packing 3 is pressed into the annular space defined by the packing box 1 and the polish rod 2. In order to make packing 3 can get into the space that overhang structure 48, packing box 1 and polished rod 2 enclose, still seted up packing entry 410 on the barrel, packing entry 410 is connected with the highest point of helicoid 49 for the space that overhang structure 48, packing box 1 and polished rod 2 enclose communicates with the external world, and then makes packing 3 can get into in the space that overhang structure 48, packing box 1 and polished rod 2 enclose.

In this embodiment, the overhanging structures 48 are distributed over the first half drum 21 and the second half drum 22 so that the overhanging structures have a larger dimension in the circumferential direction. The helicoid 49 upwards extends to the position department more than terminal surface 411 under the barrel, and the helicoid 49 top and the barrel under the vertical dimension that the vertical distance between the terminal surface 411 is not less than packing 3, like this when rotator 4 rotates, the blade of helicoid 49 and packing entry 410 transition department can not cause the cutting injury to packing 3, realizes the protection to packing 3.

In order to facilitate the operator to drive the rotating body 4 to rotate, a force application structure is disposed on the cylinder of the rotating body 4, in this embodiment, the force application structure is a handle 412 fixed on the cylinder, and the handle 412 extends along the radial direction of the cylinder to be held by the operator to apply a rotational driving force to the rotating body. Of course, in other embodiments, the force application structure may also be a rotation stop plane on the outer circumferential surface of the cylinder, so that an operator can apply a driving force to the rotating body through a caliper or a similar tool.

As shown in fig. 4 and 5, the positioning element 5 is cylindrical with an inner hole of a constant diameter hole, and the inner hole has a diameter which satisfies interference fit with the polish rod 2. The upper section of the positioning element 5 is a thick wall section 51, and the lower section thereof is a thin wall section 52, so that the outer peripheral surface of the positioning element 5 is a step surface. When the polished rod is used, the thin-wall section 52 is inserted into the barrel of the rotating body 4 as a lining sleeve, and is isolated and protected between the polished rod 2 and the barrel of the rotating body 4, so that the polished rod 2 is prevented from being damaged by the rotating barrel. The lower end face of the thick wall section 51 is in stop-fit engagement with the upper end face of the barrel. In order to realize the locking and installation of the positioning element 5 on the polish rod 2 of the rod-pumped well, the positioning element 5 is designed to be a split structure in the circumferential direction, in the embodiment, the positioning element 5 is divided into two equally-split parts in the circumferential direction, the two parts are connected through a second hinge 53 arranged on the thick wall section 51, the other end is locked through a threaded fastener, specifically, a threaded hole 54 is formed in the thick wall section of one split part, a fixing hole 55 is formed in the thick wall section of the other split part, and the two split parts are locked through screwing a screw 56 and the threaded hole 54 in the fixing hole 55. In other embodiments, a bolt can be further arranged in the fixing hole in a penetrating mode to be screwed with the threaded hole for locking.

When the packing 3 is added into the packing box 1, firstly, the long-strip-shaped packing 3 is plugged into a ring space enclosed by the packing box 1 and the polished rod 2, then the rotating body 4 and the positioning part 5 are installed on the polished rod 2, as shown in fig. 1, the packing inlet 410 on the barrel body is enabled to avoid the packing 3, then the rotating body 4 is rotated clockwise, under the stopping and positioning effects of the positioning part 5, the rotating body 4 can only do rotating motion around the axis of the polished rod and cannot move upwards, in the rotating process, the rotating body 4 applies pressure to the packing 3 through the spiral surface 49, the packing 3 is pressed into the ring space enclosed by the packing box 1 and the polished rod 2, and the packing 3 is installed into the ring space enclosed by the packing box 1 and the polished rod 2. After the packing of one pumping well is installed, the packing adding device of the pumping well is detached, and the packing adding operation is carried out on the next pumping well.

The utility model provides a rod-pumped well adds packing device's concrete embodiment 2, its difference with embodiment 1 mainly lies in: the suspending structure in the embodiment 1 is formed by downward suspending of a convex structure positioned on the inner wall of the cylinder body. In this embodiment, the protrusion is directly provided on the lower end surface of the cylinder to form the overhanging structure, and at this time, the inner wall surface of the overhanging structure and the inner wall surface of the cylinder are on the same cylindrical surface.

The utility model provides a rod-pumped well adds packing device's concrete embodiment 3, its difference with embodiment 1 mainly lies in: in embodiment 1, the positioning member has a thin-walled segment serving as a bushing, and is in insertion fit with the barrel of the rotating body through the thin-walled segment. In this embodiment, the positioning element is only in stop fit with the rotating body, and no thin-wall section is in plug fit with the barrel.

The utility model provides a rod-pumped well adds packing device's concrete embodiment 4, its difference with embodiment 1 mainly lies in: in embodiment 1, the positioning member is a separate structure to achieve the locking and installation of the positioning member on the polish rod. In this embodiment, the locating piece includes the locating piece and connects the clamp on the locating piece, and during the use, the locating piece passes through the clamp to be fixed on the polished rod, and the locating piece passes through the locating piece and stops the location to the rotating body.

The utility model provides a rod-pumped well adds packing device's concrete embodiment 5, its difference with embodiment 1 mainly lies in: in embodiment 1, the connection locking structure for realizing the connection locking between the respective divided parts of the rotating body is composed of a hinge and a bolt and nut assembly. In this embodiment, the connection locking structure of the rotating body is a dovetail projection and a dovetail slot provided on the mating surface of the mating split portion, and the dovetail slot of the dovetail projection extends vertically, so that each split portion can be vertically inserted to form an annular body. Of course, in other embodiments, the connection locking structure may also be a clip that engages the outer peripheral surface of the barrel.

Finally, it should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that the technical solutions described in the foregoing embodiments may be modified without inventive effort, or some technical features may be substituted equally. 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 (10)

1. The utility model provides a rod-pumped well adds packing device, characterized by includes structurally independent rotator (4) and setting element (5) each other, rotator (4) include the barrel and be located barrel terminal surface (411) inboard and for barrel terminal surface (411) overhang under the overhang structure (48), the external diameter of barrel and the external diameter adaptation of rod-pumped well's packing box (1) make barrel terminal surface (411) can with the up end block cooperation of packing box (1), overhang structure (48) are the arc structure of central axis vertical extension and the terminal surface is helicoid (49) down, make overhang structure (48) can extend in the annular space that packing box (1) and polished rod (2) of rod-pumped well enclose, on the barrel in the top end department of helicoid (49) seted up packing entry (410), rotator (4) are in the structure of the components of a whole that can function independently in the circumference and barrel and overhang structure (48) the internal wall and polished rod (2) clearance fit of polished rod-pumped well, have between each components of a body and connect the locking structure, make rotator (4) can fix when rod-pumped well's up the end and polish rod-pumped well's play positioning element (2) and prevent the stopper (4) and rotate, rod-pumped well upper end blocking rotator (4) and polished rod-pumped well is used for the stopper structure (2).

2. The apparatus of claim 1, wherein the inner wall of the lower end of the barrel has a raised structure, the raised structure having a portion extending downwardly below the lower end surface (411) of the barrel and the portion forming the overhanging structure (48).

3. The apparatus for packing a rod pumped well according to claim 2, wherein said raised structure further comprises an annular flange (47) on the inner wall of the barrel.

4. The packing device for the rod-pumped well according to claim 2 or 3, wherein the positioning element is cylindrical, the upper section of the cylindrical positioning element is a thick-walled section (51), the lower section of the cylindrical positioning element is a thin-walled section (52), so that the outer wall surface of the positioning element is a step surface, the thin-walled section (52) is used as a liner tube for being inserted and matched with the cylinder of the rotating body (4) to form a protection structure between the polish rod (2) and the rotating body (4) of the rod-pumped well, the lower end surface of the thick-walled section (51) is used for being blocked and matched with the rotating body (4), the positioning element is of a split structure in the circumferential direction, and the thick-walled section (51) is provided with a connecting and locking structure, so that the positioning element (5) can be fastened and locked on the polish rod (2) of the rod-pumped well.

5. The packing device for the rod pumped well is characterized in that the positioning piece (5) is divided into two parts, one side of the thick wall section (51) of the two parts is connected through a second hinge (53), the other side of the thick wall section is fixed through a threaded fastener, and the second hinge (53) and the threaded fastener form a connecting and locking structure of the positioning piece (5).

6. The packing device for the rod pumped well according to claim 5, wherein a threaded hole (54) is formed in the thick wall section of one split part of the positioning element (5), a fixing hole (55) is formed in the thick wall section of the other split part of the positioning element (5), and screws (56) or bolts are arranged in the fixing holes (55) in a penetrating manner to be matched with the threaded holes (54) so as to lock the two split parts of the positioning element (5).

7. The rod pumped well packing arrangement as claimed in any one of claims 1-3, characterized in that the helicoid (49) extends upwardly to a position above the lower end surface (411) of the barrel, and the vertical distance between the top of the helicoid (49) and the lower end surface (411) of the barrel is not less than the vertical dimension of the packing (3) to be added.

8. The rod pumped well packing apparatus as claimed in any one of claims 1 to 3, wherein the rotary body (4) is in two parts, one side of the two parts being connected by a second hinge (53) and the other side being locked by a bolt and nut assembly (46).

9. The rod pumped well packing arrangement as set forth in any one of claims 1-3, characterized in that said cantilevered structure (48) is distributed over at least two body segments of the rotary body (4).

10. The packing device for the rod pumped well according to any one of claims 1 to 3, wherein the rotating body (4) is provided with a force application structure for an operator to apply a rotational driving force to the rotating body (4).

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