Assembling device for well cementation tool

Abstract

The invention relates to an assembling device for a well cementation tool. The assembling device comprises an assembling platform, a clamping assembly arranged on the assembling platform and an assembling assembly arranged on the assembling platform. The clamping assembly is configured to be capable of clamping a shell of the well cementation tool. The assembling assembly comprises a supporting rod installed on the assembling platform, an installing arm connected to the upper end of the supporting rod and a torsion shaft connected with the installing arm, a driving piece is arranged at the lower end of the torsion shaft, and a connecting piece capable of being connected with a core body of the well cementation tool is arranged at the output end of the driving piece. The torsion shaft is configured to be capable of moving in the vertical direction after rotating to the position above the clamping assembly through the mounting arm and the supporting rod, so that the connecting piece and the core body are connected, and the driving piece rotates the core body into the shell through the connecting piece. By means of the assembling device, the assembling efficiency of the float collar or the float shoe can be effectively improved, and the labor intensity of technicians during assembling is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cementing tool assembly, and in particular to an assembly device for cementing tools. Background Art

[0002] Float collars and float shoes are two commonly used cementing tools. Both can withstand reverse bottom hole pressure after cementing is completed to prevent cement slurry from flowing back into the casing. Float collars and float shoes are generally composed of two parts, including an outer shell and a core installed in the outer shell. In the prior art, when assembling a float collar or a float shoe, a bench vise is generally used to clamp the outer shell, and then the technician manually rotates the core into the outer shell. When the technician rotates the core into the outer shell, the technician can only rotate the core 180° each time, resulting in low assembly efficiency. It takes a technician about 20 minutes to assemble a set of float collars or float shoes.

[0003] In addition, during the assembly of the float collar or float shoe, the outer shell and the core body need to squeeze the sealing ring between them, so that the sealing ring forms an interference fit with the core body and the outer shell, so as to form a sealing surface between the core body and the outer shell. However, this also makes the assembly resistance between the core body and the outer shell too large, resulting in the technicians having to apply a large torque to the core body in order to assemble the core body and the outer shell, which in turn leads to excessive labor intensity when assembling the float collar or the float shoe. For some larger-sized float collars or float shoes, two technicians are required to work at the same time to complete the assembly. Summary of the invention

[0004] Based on the above problems existing in the prior art, the present invention provides an assembly device for cementing tools, which can effectively improve the assembly efficiency of float collars or float shoes and reduce the labor intensity during assembly.

[0005] The technical solution adopted by the present invention to solve the technical problem is: to provide an assembly device for cementing tools, comprising:

[0006] Assembly platform;

[0007] A clamping assembly, disposed on an assembly platform, wherein the clamping assembly is configured to clamp the housing of the cementing tool; and

[0008] An assembly component is arranged on the assembly platform, the assembly component comprises a support rod installed on the assembly platform, a mounting arm connected to the upper end of the support rod, and a torsion shaft connected to the mounting arm, a driving member is arranged at the lower end of the torsion shaft, and a connecting member capable of engaging with the core body of the cementing tool is arranged at the output end of the driving member,

[0009] Wherein, the torsion shaft is configured to be able to move in the vertical direction after being rotated to the top of the clamping assembly through the mounting arm and the support rod, so that the connecting member and the core body are engaged, so that the driving member rotates the core body into the housing through the connecting member.

[0010] Furthermore, the mounting arm is provided with a mounting hole for mounting the torsion shaft, and a strip hole connected to the mounting hole and extending along the length direction of the mounting arm, and the mounting hole is configured to form a circumferential limit for the torsion shaft when the torsion shaft moves in the vertical direction.

[0011] Furthermore, the torsion shaft includes a limiting portion that can form a circumferential limit with the mounting hole, and a mounting portion arranged at the lower end of the limiting portion and used to mount the driving member. The circumferential dimension of the limiting portion is larger than the circumferential dimension of the mounting portion, so that a limiting surface is formed between the limiting portion and the mounting portion.

[0012] Furthermore, the size of the mounting portion is smaller than the size of the strip-shaped hole, so that the mounting portion can be received in the strip-shaped hole, so that the torsion shaft can move along the strip-shaped hole.

[0013] Furthermore, the limiting surface is configured to abut against the upper end surface of the mounting arm when the mounting portion is received in the strip-shaped hole.

[0014] Furthermore, the mounting portion is provided with a connecting block for connecting the driving member, and the connecting block is provided with a handle for grasping.

[0015] Furthermore, the driving member is an electric motor or a pneumatic motor, and the connecting member is a fork eccentrically arranged at the output end of the driving member, and is used for inserting into the plug hole opened on the core body.

[0016] Furthermore, the clamping assembly includes a fixed jaw arranged on the assembly platform, a mounting seat arranged opposite to the fixed jaw, and a movable jaw arranged on the mounting seat, and the movable jaw is configured to be able to move on the mounting seat toward or away from the fixed jaw.

[0017] Furthermore, an end surface on one side opposite to the fixed jaw and the movable jaw is a clamping surface for clamping the shell.

[0018] Furthermore, the movable jaw is provided with a screw rod penetrating the mounting seat, a nut is threadedly connected to the portion of the screw rod between the mounting seat and the movable jaw, and the nut is configured to abut against the mounting seat when the movable jaw and the fixed jaw clamp the housing.

[0019] The beneficial effect of the present invention is as follows: the present invention provides an assembly device for cementing tools, comprising an assembly platform, a clamping assembly arranged on the assembly platform, and an assembly assembly arranged on the assembly platform. The clamping assembly is configured to clamp the outer shell of the cementing tool. The assembly assembly comprises a support rod installed on the assembly platform, a mounting arm connected to the upper end of the support rod, and a torsion shaft connected to the mounting arm, a driving member is provided at the lower end of the torsion shaft, and a connecting member capable of engaging with the core of the cementing tool is provided at the output end of the driving member. The torsion shaft is configured to move in a vertical direction after being rotated to the top of the clamping assembly through the mounting arm and the support rod, so that the connecting member and the core are engaged, so that the driving member rotates the core into the outer shell through the connecting member. The assembly device can effectively improve the assembly efficiency of the floating collar or floating shoe, and reduce the labor intensity of technicians during assembly.

[0020] In addition, the clamping assembly of the assembly device includes a fixed jaw disposed on the assembly platform, a mounting seat disposed opposite to the fixed jaw, and a movable jaw disposed on the mounting seat, wherein the movable jaw is configured to be able to move on the mounting seat toward or away from the fixed jaw. The clamping assembly can be applied to float collars or float shoes of different sizes and specifications, has good versatility, and reduces operating costs and production cycles. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 Shown is a structural schematic diagram of an assembly device for cementing tools from one perspective.

[0023] Figure 2 Shown Figure 1 A schematic structural diagram of the assembly device shown in another perspective.

[0024] Figure 3 Shown Figure 1 A schematic structural diagram of the assembly device shown in FIG. 1 from a top view.

[0025] Figure 4 Shown Figure 1 A schematic structural diagram of the torsion shaft of the assembly device.

[0026] Among them, the reference numerals in the figures are: 100, assembly device; 10, transport vehicle; 11, lifting platform; 20, assembly platform; 30, clamping assembly; 31, fixed jaw; 32, mounting seat; 33, movable jaw; 331, screw; 332, reinforcement plate; 333, clamping surface; 40, assembly assembly; 41, support rod; 42, mounting arm; 421, mounting hole; 422, strip hole; 43, torque shaft; 431, limiting part; 432, mounting part; 433, limiting surface; 44, driving member; 45, connecting member; 46, connecting block; 461, handle;

[0027] 200, cementing tool; 201, housing; 202, core. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, so it only shows the composition related to the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] refer to Figure 1 As shown, an assembly device 100 provided by the present invention includes a transport vehicle 10 for transporting the outer shell 201 and the core 202 of the cementing tool 200, and an assembly platform 20 for assembling the core 202 and the outer shell 201. The cementing tool 200 is a floating collar or a floating shoe. The transport vehicle 10 is provided with a lifting platform 11 that can be flush with the table surface of the assembly platform 20, and is used to place the outer shell 201 and the core 202. The assembly platform 20 is provided with a clamping assembly 30 for clamping the outer shell 201, and an assembly assembly 40 for rotating the core 202 into the outer shell 201. The assembly assembly 40 is configured to be able to rotate the core 202 into the outer shell 201 under the operation of a technician, thereby effectively improving the assembly efficiency of the floating collar or the floating shoe and reducing the labor intensity during assembly.

[0030] Combination Figure 1As shown, in some embodiments, the lifting platform 11 of the transport vehicle 10 can use a hydraulic cylinder in conjunction with a scissor structure to achieve a lifting function, so that the lifting platform 11 can be flush with the assembly platform 20. This allows technicians to easily move the outer shell 201 or core 202 of the floating hoop or floating shoe from the lifting platform 11 to the assembly platform 20, avoiding the technicians from bending over to carry, thereby effectively reducing the labor intensity of the technicians. In some other embodiments, the lifting platform 11 of the transport vehicle 10 can also use a screw nut structure in conjunction with a scissor structure to achieve a lifting function. This will not be elaborated in detail in this application.

[0031] refer to Figure 1-3 As shown, in some embodiments, the clamping assembly 30 includes a fixed jaw 31 mounted on the assembly platform 20, a mounting seat 32 arranged opposite to the fixed jaw 31, and a movable jaw 33 arranged on the mounting seat 32. The movable jaw 33 is configured to be able to move on the mounting seat 32 toward the fixed jaw 31 so as to clamp the shell 201 of the floating collar or floating shoe, thereby facilitating the subsequent assembly of the shell 201 and the core 202 by the assembly assembly 40. This also enables the clamping assembly 30 to be applicable to floating collars or floating shoes of different sizes and specifications, and has good versatility.

[0032] In some embodiments, a screw rod 331 penetrating the mounting seat 32 is provided on the side of the movable jaw 33 facing away from the fixed jaw 31. A nut (not shown in the figure) is screwed on the portion of the screw rod 331 between the movable jaw 33 and the mounting seat 32. When the movable jaw 33 and the fixed jaw 31 clamp the outer shell 201 of the floating collar or the floating shoe together, the nut can be pressed against the side of the mounting seat 32 facing the movable jaw 33. When the movable jaw 33 and the fixed jaw 31 no longer clamp the outer shell 201 of the floating collar or the floating shoe, the nut can be screwed to reduce the distance between the nut and the movable jaw 33. In this way, the movable jaw 33 and the screw rod 331 can move in a direction away from the fixed jaw 31, so that the distance between the movable jaw 33 and the fixed jaw 31 increases, and the assembled floating collar or the floating shoe can be taken out from between the fixed jaw 31 and the movable jaw 33.

[0033] Combination Figure 2As shown, in some preferred embodiments, a reinforcing plate 332 is provided on the side of the fixed jaw 31 and the mounting seat 32 that are away from each other. The reinforcing plate 332 can apply a bending moment in the direction of rotation of the housing 201 to the fixed jaw 31 and the mounting seat 32 when the fixed jaw 31 and the movable jaw 33 clamp the housing 201, so as to balance the reverse bending moment applied by the housing 201 to the fixed jaw 31 and the mounting seat 32, thereby improving the stability of the clamping assembly 30. In addition, the reinforcing plate 332 also increases the connection area between the fixed jaw 31 and the mounting seat 32 and the assembly platform 20, thereby further improving the stability of the clamping assembly 30.

[0034] Combination Figure 3 As shown, in some preferred embodiments, the end surface of one side opposite to the fixed jaw 31 and the movable jaw 33 is a clamping surface 333, which is used to clamp the shell 201. In this embodiment, the clamping surfaces 333 are all V-shaped surfaces. In some other embodiments, the clamping surface 333 can also be an arc-shaped surface. Preferably, a rubber anti-slip member (not shown in the figure) can be pasted on the clamping surface 333 to increase the friction between the clamping surface 333 and the surface of the shell 201, ensuring that the fixed jaw 31 and the movable jaw 33 can stably clamp the shell 201.

[0035] In some other embodiments, the clamping assembly 30 may also be a bench vise installed on the assembly platform 20 .

[0036] Reference again Figure 1-3 As shown, in some embodiments, the assembly assembly 40 includes a support rod 41 extending upward perpendicular to the assembly platform 20, a mounting arm 42 extending horizontally toward the clamping assembly 30 at the upper end of the support rod 41, and a torsion shaft 43 arranged at one end of the mounting arm 42 away from the support rod 41. A driving member 44 is arranged at the lower end of the torsion shaft 43, and a connecting member 45 capable of engaging with the core 202 of the floating collar or the floating shoe and forming a circumferential limit is arranged at the output end of the driving member 44. After the clamping assembly 30 clamps the outer shell 201 of the floating collar or the floating shoe, the technician can pre-assemble the core 202 with the outer shell 201. The driving member 44 can drive the connecting member 45 to rotate after the connecting member 45 engages with the core 202 and forms a circumferential limit, so that the core 202 can rotate to the inside of the outer shell 201.

[0037] In some embodiments, the mounting arm 42 is configured to be able to rotate relative to the assembly platform 20 through the support rod 41, so that the driving member 44 at the end of the mounting arm 42 can face the clamping assembly 30 located at different positions on the assembly platform 20, so as to improve the convenience of the assembly device 100 when in use. In some embodiments, the lower end of the support rod 41 can be rotatably connected to the assembly platform 20 through a bearing installed on the assembly platform 20, while the support rod 41 and the mounting arm 42 are fixedly connected. In this way, the mounting arm 42 can rotate relative to the assembly platform 20 through the support rod 41. In some other embodiments, the lower end of the support rod 41 is fixedly connected to the assembly platform 20 by welding, screwing or bolting, and the mounting arm 42 is rotatably connected to the support rod 41 through a bearing arranged at the upper end of the support rod 41. In this way, the mounting arm 42 can still rotate relative to the assembly platform 20 through the support rod 41.

[0038] Combination Figure 3 As shown, in some embodiments, a mounting hole 421 extending in the vertical direction is provided at one end of the mounting arm 42 away from the support rod 41 for mounting the torsion shaft 43. The mounting arm 42 is also provided with a strip hole 422 which is connected to the mounting hole 421 and extends in the length direction of the mounting arm 42, and the strip hole 422 also passes through the mounting arm 42 in the vertical direction. The mounting hole 421 is configured to enable the torsion shaft 43 to move in the vertical direction so that the connecting member 45 connected to the driving member 44 can be combined with or separated from the core 202. The strip hole 422 is configured to limit the torsion shaft 43 in the vertical direction upward through the mounting arm 42 to prevent the torsion shaft 43 from falling off the mounting arm 42 when the assembly device 100 is not in use.

[0039] In some embodiments, the torsion shaft 43 can move in a vertical downward direction along the mounting hole 421 to engage the connecting member 45 with the core 202, so that the core 202 and the housing 201 can be assembled through the driving member 44. After the assembly is completed, the torsion shaft 43 can move in a vertical upward direction along the mounting hole 421 to separate the connecting member 45 from the core 202, and then the torsion shaft 43 moves in the strip hole 422 along the length direction of the mounting arm 42, so that the mounting arm 42 forms a vertical upward limit on the torsion shaft 43.

[0040] refer to Figure 4As shown, in some embodiments, the torsion shaft 43 includes a limiting portion 431 and a mounting portion 432 disposed at the lower end of the limiting portion 431. The circumferential dimension of the limiting portion 431 is greater than the circumferential dimension of the mounting portion 432, so that a limiting surface 433 facing vertically downward is formed between the limiting portion 431 and the mounting portion 432. The maximum circumferential dimension of the limiting portion 431 is smaller than the dimension of the mounting hole 421, so that the limiting portion 431 can move in the vertical direction in the mounting hole 421. The circumferential dimension of the limiting portion 431 is greater than the dimension of the strip hole 422 in the width direction, so that the limiting surface 433 between the limiting portion 431 and the mounting portion 432 can abut against the upper end surface of the mounting arm 42. The lower end of the mounting portion 432 is provided with a connecting block 46 for connecting the driving member 44, and the connecting block 46 is provided with a handle 461 extending in the horizontal direction for the technician to grasp. The circumferential dimension of the mounting portion 432 is smaller than the dimension of the strip hole 422 along the width direction, so that the mounting portion 432 is located inside the strip hole 422 when the limiting surface 433 abuts against the upper end surface of the mounting arm 42, so that the mounting portion 432 can move along the strip hole 422.

[0041] In some of the embodiments, the limiting portion 431 is also configured to form a limit in the circumferential direction with the mounting arm 42 in the mounting hole 421, so that the mounting arm 42 can provide torque to the torsion shaft 43 when the driving member 44 assembles the housing 201 and the core 202 through the connecting member 45. In this way, it is not necessary for the technician to use the handle 461 to provide torque to the torsion shaft 43 when the driving member 44 assembles the housing 201 and the core 202 through the connecting member 45, thereby effectively reducing the work intensity of the technician. In some of the preferred embodiments, the cross section of the limiting portion 431 is square, and the cross section of the mounting portion 432 is circular. The shape of the mounting hole 421 is the same square as the cross section of the limiting portion 431, so that the limiting portion 431 of the torsion shaft 43 can also form a limit in the circumferential direction with the mounting arm 42 when it moves in the vertical direction in the mounting hole 421.

[0042] In some embodiments, the driving member 44 may be an electric motor or a pneumatic motor, and the connecting member 45 may be a fork eccentrically arranged at the output end of the driving member 44 so as to be inserted into a plug hole pre-opened on the core 202, thereby achieving engagement between the connecting member 45 and the core 202 and forming a limit in the circumferential direction.

[0043] Combination Figure 1-4As shown, the use process of the assembly device 100 provided by the present invention is as follows. The technician transports the outer shell 201 or the core 202 of the floating collar or the floating shoe to the side of the assembly platform 20 by means of the transport vehicle 10, and then adjusts the lifting platform 11 to be flush with the assembly platform 20 so as to transport the outer shell 201 and the core 202 to the assembly platform 20. After the technician clamps the outer shell 201 by means of the clamping assembly 30 on the assembly platform 20, the core 202 and the outer shell 201 are pre-assembled, and then the outer shell 201 and the core 202 are assembled by means of the assembly assembly 40.

[0044] The technician rotates the mounting arm 42 so that the torsion shaft 43 in the mounting hole 421 is located above the core 202, and then grasps the handle 461 to move the torsion shaft 43 into the mounting hole 421. At this time, the torsion shaft 43 can move vertically downward in the mounting hole 421 so that the connecting member 45 engages with the core 202 and forms a circumferential limit. The driving member 44 is started, and the driving member 44 rotates the core 202 relative to the shell 201 through the connecting member 45. The technician grasps the handle 461 and moves the torsion shaft 43 in the vertical downward direction at the same time, so that the core 202 continuously rotates to the inside of the shell 201 until the core 202 and the shell 201 are assembled. The technician grasps the handle 461 and moves the torsion shaft 43 in the vertical upward direction, so that the limiting portion 431 of the torsion shaft 43 completely leaves the mounting hole 421 and ensures that the mounting portion 432 can move into the bar hole 422. Finally, the torsion shaft 43 is moved along the length direction of the mounting arm 42, so that the mounting portion 432 of the torsion shaft 43 moves into the strip hole 422. At this time, the limiting surface 433 between the limiting portion 431 and the mounting portion 432 can abut against the upper end surface of the mounting arm 42.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An assembly device for cementing tools ， include, Assembly platform (20); A clamping assembly (30) is arranged on the assembly platform (20), and the clamping assembly (30) is configured to clamp the housing (201) of the cementing tool; as well as An assembly component (40) is arranged on the assembly platform (20), the assembly component (40) comprises a support rod (41) installed on the assembly platform (20), a mounting arm (42) connected to the upper end of the support rod (41), and a torsion shaft (43) connected to the mounting arm (42), a driving member (44) is arranged at the lower end of the torsion shaft (43), and a connecting member (45) capable of engaging with the core body (202) of the cementing tool is arranged at the output end of the driving member (44), The torsion shaft (43) is configured to be able to move in a vertical direction after being rotated to the top of the clamping assembly (30) through the mounting arm (42) and the support rod (41), so that the connecting member (45) and the core body (202) are engaged, so that the driving member (44) can rotate the core body (202) into the housing (201) through the connecting member (45).

2. The assembly device for cementing tool according to claim 1, It is characterized in that The mounting arm (42) is provided with a mounting hole (421) for mounting the torsion shaft (43), and a strip hole (422) connected to the mounting hole (421) and extending along the length direction of the mounting arm (42); the mounting hole (421) is configured to form a circumferential limit for the torsion shaft (43) when the torsion shaft (43) moves in the vertical direction.

3. The assembly device for cementing tool according to claim 2, It is characterized in that The torsion shaft (43) comprises a limiting portion (431) capable of forming a circumferential limit with the mounting hole (421), and a mounting portion (432) arranged at the lower end of the limiting portion (431) and used for mounting the driving member (44), wherein the circumferential dimension of the limiting portion (431) is greater than the circumferential dimension of the mounting portion (432), so that a limiting surface (433) is formed between the limiting portion (431) and the mounting portion (432).

4. The assembly device for cementing tool according to claim 3, It is characterized in that The size of the mounting portion (432) is smaller than the size of the strip-shaped hole (422), so that the mounting portion (432) can be received in the strip-shaped hole (422), so that the torsion shaft (43) can move along the strip-shaped hole (422).

5. The assembly device for cementing tool according to claim 4, It is characterized in that The limiting surface (433) is configured to abut against the upper end surface of the mounting arm (42) when the mounting portion (432) is received in the strip-shaped hole (422).

6. The assembly device for cementing tool according to claim 3, It is characterized in that The mounting portion (432) is provided with a connection block (46) for connecting to the driving member (44), and the connection block (46) is provided with a handle (461) for grasping.

7. An assembly device for a cementing tool according to any one of claims 1 to 6, It is characterized in that The driving member (44) is an electric motor or a pneumatic motor, and the connecting member (45) is a fork eccentrically arranged at the output end of the driving member (44) and used for inserting into the plug hole opened on the core (202).

8. An assembly device for a cementing tool according to any one of claims 1 to 6, It is characterized in that The clamping assembly (30) comprises a fixed jaw (31) arranged on the assembly platform (20), a mounting seat (32) arranged opposite to the fixed jaw (31), and a movable jaw (33) arranged on the mounting seat (32), wherein the movable jaw (33) is configured to be movable on the mounting seat (32) in a direction approaching or moving away from the fixed jaw (31).

9. The assembly device for cementing tool according to claim 8, It is characterized in that The end surface on one side opposite to the fixed jaw (31) and the movable jaw (33) is a clamping surface (333) for clamping the housing (201).

10. The assembly device for cementing tool according to claim 8, It is characterized in that The movable jaw (33) is provided with a screw rod (331) penetrating the mounting seat (32); a nut is threadedly connected to a portion of the screw rod (331) located between the mounting seat (32) and the movable jaw (33); the nut is configured to abut against the mounting seat (32) when the movable jaw (33) and the fixed jaw (31) clamp the housing (201).

Images