CN113700451B - Well cementation cement sheath preparation facilities - Google Patents
Well cementation cement sheath preparation facilities Download PDFInfo
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- CN113700451B CN113700451B CN202010440476.2A CN202010440476A CN113700451B CN 113700451 B CN113700451 B CN 113700451B CN 202010440476 A CN202010440476 A CN 202010440476A CN 113700451 B CN113700451 B CN 113700451B
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- bevel gear
- cement sheath
- protective shell
- simulated
- connecting rod
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention discloses a well cementation cement sheath preparation device, and belongs to the technical field of well cementation. The device comprises: protective housing, last cauldron lid, interior cauldron bottom, sleeve pipe, drive assembly, simulated formation. The drive assembly includes: the device comprises a transmission screw, a threaded sleeve, a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear, a first connecting rod, a second connecting rod, a fixed support and a double-shaft motor; the threaded sleeve is fixed on the outer side wall of the simulated stratum; the transmission screw rod is sleeved in the ball bearings in the side walls of the protective shell and the heat preservation layer, one end of the transmission screw rod is connected with the threaded sleeve, and the other end of the transmission screw rod is connected with the first bevel gear; the fixed support is fixed on the outer wall of the protective shell and used for supporting a rotatable first connecting rod, and a second bevel gear and a third bevel gear are fixed at two ends of the first connecting rod; one end of the second connecting rod is connected with one output shaft of the double-shaft motor, and the other end of the second connecting rod is connected with the fourth bevel gear; the first bevel gear is meshed with the second bevel gear, and the third bevel gear is meshed with the fourth bevel gear.
Description
Technical Field
The invention relates to the technical field of well cementation, in particular to a well cementation cement sheath preparation device.
Background
In oil and gas well cementing operations, well cement is typically injected into the annulus between the casing and the formation downhole, causing the cement slurry to set and cure within a designed time to form a cement sheath having interval packing capability. Besides the isolation layer, the cement sheath has an indispensable effect on hanging and protecting the casing pipe and prolonging the production period of the whole well. Because the service environment of the cement sheath in the pit is severe, the cement sheath can be influenced by various factors, such as eccentric casing, large belly well hole, slurry mixing, uneven filling, load change, high temperature and high pressure, and the like, during actual construction on site, and the sealing capacity of the cement sheath can be disturbed. Therefore, it is necessary to simulate the preparation of the well cementing cement sheath and test the packing capacity thereof.
The prior art discloses a well cementation cement sheath preparation facilities, including the protective housing, connect in the last kettle cover of protective housing upper end, fixedly connected with heat preservation on the protective housing inner wall, protective housing inner bottom fixedly connected with inner kettle bottom, go up kettle cover lower extreme fixedly connected with sleeve pipe, the sleeve pipe lower extreme rotates with inner kettle bottom to be connected, the sleeve pipe outside is provided with simulated stratum, be equipped with the cement cavity between sleeve pipe and the simulated stratum and be used for filling cement and form the cement sheath, correspond the cutting threaded hole on protective housing and the heat preservation, fasten and revolve post tip and run through behind the screw hole with simulated stratum threaded connection, the simulated stratum separates into two parts with the axis of ordinates direction, in order to separate or dock under the drive of fastening revolve post. And measuring outside the protective shell through the acoustic wave measuring instrument to obtain the cementing quality between the cement sheath and the sleeve and the simulated stratum, and further obtain the packing capacity of the cement sheath.
In carrying out the invention, the inventors have found that there are at least the following problems in the prior art:
the fastening revolves the lateral wall that the post runs through the protective housing with threaded connection mode, when cement sheath continuously exerts radial outside force to the simulation stratum, very easily causes the fastening revolve the post and release from the lateral wall of protective housing.
Disclosure of Invention
In view of the above, the present invention provides a device for preparing a cementing cement sheath, which can solve the above technical problems.
Specifically, the method comprises the following technical scheme:
a well cementation cement sheath preparation apparatus, the apparatus comprising: a protective shell with an upper opening, an upper kettle cover, an inner kettle bottom cover, a sleeve, a driving assembly and a simulated stratum;
an insulating layer is arranged on the inner wall of the protective shell, the inner kettle bottom cover is fixedly arranged below the inner part, and the upper kettle cover is covered at the upper opening;
the sleeve is positioned in the middle of the interior of the protective shell, the upper end of the sleeve is fixedly connected with the upper kettle cover, and the lower end of the sleeve is contacted with the upper end of the inner kettle bottom cover;
two semicircular cylindrical simulated stratum capable of horizontally moving are symmetrically arranged in the protective shell, the upper end of the simulated stratum is in sliding contact with the upper kettle cover, and the lower end of the simulated stratum is in sliding contact with the inner kettle bottom cover;
an annular cavity is formed between the sleeve and the two simulated strata in the butt joint state and is used for accommodating cement to form a cement ring;
the drive assembly includes: the device comprises a transmission screw, a ball bearing, a threaded sleeve, a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear, a first connecting rod, a second connecting rod, a fixed support and a double-shaft motor;
the threaded sleeve is fixed at the middle position of the outer side wall of the simulated stratum;
the ball bearings are fixed in through holes formed in the side walls of the protective shell and the heat preservation layer;
the transmission screw rod is sleeved inside the ball bearing, one end of the transmission screw rod is in threaded connection with the threaded sleeve, and the other end of the transmission screw rod is fixedly connected with the first bevel gear outside the protective shell;
the fixed support is fixed on the lateral part of the outer wall of the protective shell and is used for supporting a rotatable first connecting rod along the vertical direction, and two ends of the first connecting rod are respectively and fixedly connected with the second bevel gear and the third bevel gear;
the double-shaft motor is fixed at the rear part of the outer wall of the protective shell, one end of the second connecting rod is coaxially connected with one output shaft of the double-shaft motor, and the other end of the second connecting rod is fixedly connected with the fourth bevel gear;
the first bevel gear is meshed with the second bevel gear, and the third bevel gear is meshed with the fourth bevel gear.
In one possible implementation, the fixing support includes: the upper support and the lower support are oppositely arranged;
ball bearings are arranged in the upper support and the lower support and are used for sleeving the first connecting rod.
In one possible implementation, the apparatus further includes: and the protective cover is used for covering the part of the driving assembly, which is positioned outside the protective shell.
In one possible implementation, the apparatus further includes: the clamping assembly is used for pressing the upper kettle cover at the upper opening of the protective shell.
In one possible implementation, the clamping assembly includes: the device comprises a fixed rod, a pressing plate, an inserting rod, a compression spring and a limiting pull plate;
the lower end of the fixing rod is fixed on the top wall of the protective shell;
the pressing plate is rotatably sleeved on the fixing rod and used for pressing the upper kettle bottom cover;
the inserting rod can vertically movably penetrate through the pressing plate and is inserted into a slot formed in the top wall of the upper kettle cover;
the limiting pull plate is fixed at the upper end of the inserted link;
the compression spring is sleeved on the inserted link, and two ends of the compression spring are fixedly connected with the pressing plate and the limiting pulling plate respectively.
In one possible implementation, the clamping assembly further includes: the two anti-falling plates are fixedly sleeved on the fixing rod and clamp the pressing plate in the fixing rod.
In one possible implementation manner, a guide chute is arranged on the inner kettle bottom cover, and the guide chute extends along the moving direction of the simulated stratum;
the lower end of the simulated stratum is connected with a sliding block;
when the simulated stratum moves horizontally, the sliding block moves in the guide sliding groove.
In one possible implementation, the guide chute includes: a body portion and a remainder portion in communication with each other;
the margin portion is configured to provide a movement space for the two simulated formations to abut to eliminate a gap after the contact portions of the two simulated formations wear to create the gap.
In one possible embodiment, the guide chute and the slide are rectangular in cross-section.
In one possible implementation manner, a lifting plate is fixedly connected to the bottom end of the sleeve, and the lifting plate is used for supporting the cement sheath;
the upper end of the inner kettle bottom cover is provided with a containing groove for containing the lifting plate.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
according to the well cementation cement sheath preparation device provided by the embodiment of the invention, through the matched transmission of the double-shaft motor, the transmission screw, the threaded sleeve, the first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear, two simulated strata move in opposite directions to be close to or far away from each other, and meanwhile, when the double-shaft motor does not work, even if the cement sheath continuously applies radial outward force to the simulated strata, the transmission screw can always and stably keep still under the supporting action of the bevel gears, and the phenomenon of reverse tripping does not occur. The rotation direction of the output shaft of the double-shaft motor is controlled, so that the two simulated strata simultaneously move inwards until the two simulated strata are tightly butted, or the two simulated strata simultaneously move outwards until the two simulated strata are not tightly held by the cement sheath.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of an exemplary well cementing cement sheath manufacturing apparatus provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of an exemplary driving assembly according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an exemplary clamping assembly according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an exemplary guide chute according to an embodiment of the present invention.
Reference numerals denote:
1-a protective shell, wherein the protective shell is provided with a plurality of grooves,
2-the kettle cover is arranged on the kettle,
3-a bottom cover of the inner kettle,
4-a sleeve pipe, wherein the sleeve pipe is provided with a plurality of grooves,
a 5-drive assembly for the vehicle,
a 51-drive screw, which is provided with a plurality of driving screws,
a 52-thread sleeve, which is provided with a plurality of threads,
53-a first bevel gear wheel,
54-a second bevel gear, which is provided with a first bevel gear,
55-a third bevel gear, which is provided with a third bevel gear,
56-a fourth bevel gear which is provided with a bevel gear,
57-the first link is provided with a first connecting rod,
58-the second link is connected with the first link,
59-a fixed support, wherein the fixed support is provided with a plurality of fixing holes,
591-an upper support, wherein the upper support is provided with a plurality of upper support seats,
592-a lower support base, which is provided with a plurality of lower support bases,
510-a double-shaft motor,
6-a simulated formation of the earth,
7-a heat-insulating layer, wherein the heat-insulating layer is arranged on the surface of the glass fiber reinforced plastic,
8-a cement sheath, wherein the cement sheath is provided with a cement sheath,
a 9-protection cover for protecting the patient from being damaged,
a 10-clamping assembly, wherein the clamping assembly comprises a clamping head and a clamping head,
101-a fixing rod, wherein the fixing rod is provided with a fixing groove,
102-a pressure plate, wherein the pressure plate,
103-the plug-in rod is connected with the plug-in rod,
104-a compression spring,
105-a limit pull plate, wherein the limit pull plate is provided with a limit pull plate,
106-a drop-off prevention plate,
107-a slot in which the first slot is formed,
11-a guiding chute, wherein the guiding chute is provided with a guiding groove,
111-the body portion,
112-a margin portion of the first frame,
a 12-slide block, wherein the slide block is provided with a plurality of slide grooves,
13-lifting plate.
Detailed Description
In order to make the technical scheme and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
The embodiment of the invention provides a well cementation cement sheath preparation device, which is shown in the accompanying drawings 1 and 2, and comprises the following components: a protective shell 1 with an upper opening, an upper kettle cover 2, an inner kettle bottom cover 3, a sleeve 4, a driving component 5 and a simulated stratum 6.
Wherein, the inner wall of the protective shell 1 is provided with a heat preservation layer 7, the lower part of the inner part of the protective shell 1 is fixedly provided with an inner kettle bottom cover 3, and the upper opening of the protective shell 1 is covered with an upper kettle cover 2;
the sleeve 4 is positioned in the middle of the interior of the protective shell 1, the upper end of the sleeve 4 is fixedly connected with the upper kettle cover 2, and the lower end of the sleeve 4 is contacted with the upper end of the inner kettle bottom cover 3;
two semicircular cylindrical simulated stratum 6 capable of horizontally moving are symmetrically arranged in the protective shell 1, the upper end of the simulated stratum 6 is in sliding contact with the upper kettle cover 2, and the lower end of the simulated stratum 6 is in sliding contact with the inner kettle bottom cover 3;
an annular cavity is formed between the casing 4 and the two simulated formations 6 in the docked state for containing cement and forming a cement sheath 8.
As shown in fig. 2, the driving assembly 5 includes: a drive screw 51, a ball bearing, a threaded sleeve 52, a first bevel gear 53, a second bevel gear 54, a third bevel gear 55, a fourth bevel gear 56, a first link 57, a second link 58, a fixed support 59, and a biaxial motor 510.
Wherein the threaded sleeve 52 is fixed in a middle position of the outer sidewall of the simulated formation 6;
the ball bearings are fixed in through holes formed in the side walls of the protective shell 1 and the heat preservation layer 7;
the transmission screw rod 51 is sleeved in the ball bearing, one end of the transmission screw rod 51 is in threaded connection with the threaded sleeve 52, and the other end of the transmission screw rod 51 is fixedly connected with the first bevel gear 53 outside the protective shell 1;
the fixed support 59 is fixed on the lateral part of the outer wall of the protective housing 1 and is used for supporting the rotatable first connecting rod 57 along the vertical direction, and two ends of the first connecting rod 57 are fixedly connected with the second bevel gear 54 and the third bevel gear 55 respectively;
the double-shaft motor 510 is fixed at the rear part of the outer wall of the protective shell 1, one end of the second connecting rod 58 is coaxially connected with one output shaft of the double-shaft motor 510, and the other end of the double-shaft motor 510 is fixedly connected with the fourth bevel gear 56;
the first bevel gear 53 is meshed with the second bevel gear 54, and the third bevel gear 55 is meshed with the fourth bevel gear 56.
The following is an explanation of the working principle of the device for preparing the well cementation cement sheath by combining the structure of the device:
cement is poured into the annular cavity between the simulated stratum 6 and the sleeve 4, then the upper kettle cover 2 is covered at the upper opening of the protective shell 1, the simulated stratum 6 is stabilized at an initial working position (namely, the position for holding the cement sheath 8), the cement sheath 8 is prepared after the cement is solidified, and then the packing capacity of the cement sheath 8 is detected (specifically, the outside of the protective shell 1 is measured by an acoustic wave measuring instrument, so that the cementing quality between the cement sheath 8 and the sleeve 4 and the simulated stratum 6 is obtained, and then the packing capacity of the cement sheath 8 is obtained).
After the packing capacity of the cement sheath 8 is detected, a double-shaft motor 510 is started, the double-shaft motor 510 drives a fourth bevel gear 56 to rotate through a second connecting rod 58, the meshing action of the fourth bevel gear 56 and a third bevel gear 55 is utilized to drive a first connecting rod to rotate, then a second bevel gear 54 is driven to rotate, the meshing action of the second bevel gear 54 and the first bevel gear 53 is utilized to drive a transmission screw 51 to rotate, and the thread sleeve 52 moves linearly on the transmission screw 51 rotating in situ along the axial direction thereof through the threaded connection action of the transmission screw 51 and the thread sleeve 52, so that two simulated strata 6 move outwards simultaneously and the cement sheath 8 is not held tightly any more. And then the upper kettle cover 2 is removed, and the cement sheath 8 is taken out of the protective shell 1.
It can be seen that, in the cement sheath preparation apparatus for well cementation provided in the embodiment of the present invention, through the cooperation transmission of the biaxial motor 510, the driving screw 51, the threaded sleeve 52, the first bevel gear 53, the second bevel gear 54, the third bevel gear 55, and the fourth bevel gear 56, the two simulated strata 6 move in opposite directions to approach each other or separate from each other, and at the same time, when the biaxial motor 510 is not in operation, even if the cement sheath 8 continuously applies a force radially outwards to the simulated strata 6, the driving screw 51 can always remain stationary stably under the supporting action of the bevel gears, and no reverse tripping phenomenon occurs. Because the motor double-shaft motor 510 can rotate clockwise and anticlockwise, the rotation direction of the output shaft of the double-shaft motor 510 is controlled, so that the two simulated strata 6 can move inwards at the same time until the two simulated strata 6 are in tight butt joint, or the two simulated strata 6 can move outwards at the same time until the two simulated strata are not tightly held by the cement sheath 8.
The following describes the structure and function of each component involved in the preparation device of the well cementation cement sheath:
for the protective case 1, which is a cylindrical structure with an upper opening, the inner wall of the protective case 1 is provided with a heat insulating layer 7, for example, the heat insulating layer 7 may be fixed on the inner wall of the protective case 1 by coating bonding or bonding, and the heat insulating layer 7 is used to maintain a desired temperature inside the protective case 1. The inside below of protective housing 1 is fixed to be provided with interior cauldron bottom 3, and interior cauldron bottom 3 is the disc, and its lateral wall and the inside wall of protective housing 1 closely cooperate. The lower extreme of interior cauldron bottom 3 can set up the bracing piece, makes the bottom mounting of bracing piece support interior cauldron bottom 3 in the bottom of protective housing 1, makes it be fixed in the protective housing 1 inside steadily.
The central axis of sleeve pipe 4 coincides with the central axis of protective housing 1 to ensure that it is located the inside intermediate position of protective housing 1, sleeve pipe 4 upper end and last kettle cover 2 fixed connection, in order to carry out the same operation along with the lifting or putting down of last kettle cover 2, improve the operating convenience, ensure sleeve pipe 4 position stability simultaneously. The lower end of the sleeve 4 is contacted with the upper end of the inner kettle bottom cover 3, the sleeve 4 is supported by the inner kettle bottom cover 3, and the sleeve 4 is conveniently taken out.
Further, as shown in fig. 1, the bottom end of the sleeve 4 is fixedly connected with a lifting plate 13, and the lifting plate 13 is used for supporting the cement sheath 8; the upper end of the inner kettle bottom cover 3 is provided with a containing groove for containing the lifting plate 13.
Thus, when the cement sheath 8 is taken out, the upper kettle cover 2 is pulled, the sleeve 4 and the lifting plate 13 are driven to move upwards, and the lifting plate 13 supports the cement sheath 8 to move upwards together, so that the cement sheath 8 can be taken out easily and efficiently.
For example, the lifting plate 13 may be a disc-shaped plate, and correspondingly, the accommodating groove arranged at the middle position of the upper end of the inner kettle bottom cover 3 is a circular groove, so that the rotation of the sleeve 4 in the protective shell 1 can be facilitated, and the adhesion between the sleeve 4 and the cement sheath 8 can be eliminated, so that the cement sheath 8 can be taken out conveniently.
For the simulated formation 6, two semicircular cylindrical simulated formations 6 with the same structure can be obtained by equally dividing the whole cylindrical simulated formation 6 along the longitudinal direction, and when the two simulated formations 6 are butted, the whole cylindrical simulated formation 6 can be formed. An annular cavity is formed between the casing 4 and the two simulated formations 6 in the docked state for containing cement and forming a cement sheath 8.
For the driving assembly 5, two output shafts of the double-shaft motor 510 are respectively and coaxially connected with one second connecting rod 58, and further, the output shafts of the double-shaft motor 510 and the second connecting rod 58 can be connected through a speed reducer, so that the rotating speed of the second connecting rod 58 meets the requirement.
The outer wall sides of the protective housing 1 are symmetrically fixed with a fixing support 59, respectively, the fixing support 59 is used for supporting the first link 57, and the first link 57 is arranged along the vertical direction and can rotate under the driving of the double-shaft motor 510.
In one possible design, as shown in fig. 2, the fixed mount 59 comprises: the upper support 591 and the lower support 592 are disposed opposite to each other, wherein ball bearings are disposed inside the upper support 591 and the lower support 592 for sleeving the first link 57. The upper portion of the first link 57 is fixedly connected with the ball bearing inside the upper support 591, and the lower portion of the first link 57 is fixedly connected with the ball bearing inside the lower support 592, so that not only can the first link 57 be stably supported, but also the first link 57 can be ensured to stably rotate.
The driving screw 51 is sleeved inside the ball bearings on the side walls of the protective shell 1 and the heat preservation 7, one end of the driving screw 51 is in threaded connection with the threaded sleeve 52, and the other end of the driving screw 51 is fixedly connected with the first bevel gear 53 outside the protective shell 1, so that the driving screw 51 can be stably rotated in situ (i.e. does not move in the axial direction) under the driving of the double-shaft motor 510. Wherein the axial direction of the drive screw 51 and the second link 58 are both parallel to the direction of movement of the simulated formation 6.
Through the through holes which are correspondingly communicated are formed in the side walls of the protective shell 1 and the heat preservation layer 7, and the ball bearings are arranged in the through holes to support the transmission screw 51, so that the rotation process of the transmission screw is more stable.
In one possible design, as shown in fig. 1, the apparatus provided in the embodiment of the present invention further includes: a protective cover 9, wherein the protective cover 9 is used for covering the part of the driving assembly 5 located outside the protective shell 1, specifically: a first bevel gear 53, a second bevel gear 54, a third bevel gear 55, a fourth bevel gear 56, a first link 57, a second link 58, a fixed support 59, and a biaxial motor 510, which are located outside the protective case 1.
The protective cover 9 may be closed or open at the lower part, and may be cylindrical or rectangular in shape, and may be fixed to the outer wall of the protective case 1 by a fixing member such as a fastening bolt.
In one possible design, the device provided by the embodiment of the invention further includes: the clamping assembly 10, wherein, this clamping assembly 10 is used for compressing tightly last kettle cover 2 in the upper shed department of protective housing 1, improves the stability when last kettle cover 2 is covered to the upper shed department of protective housing 1.
As an example, as shown in fig. 3, the chucking assembly 10 includes: a fixed rod 101, a pressing plate 102, a plug-in rod 103, a compression spring 104 and a limiting pull plate 105.
Wherein, the lower end of the fixed rod 101 is fixed on the top wall of the protective shell 1;
the pressing plate 102 is rotatably sleeved on the fixing rod 101 and used for pressing the bottom cover of the upper kettle;
the inserting rod 103 can vertically movably penetrate through the pressing plate 102 and is inserted into a slot 107 formed in the top wall of the upper kettle cover 2;
the limiting pull plate 105 is fixed at the upper end of the inserted link 103;
the compression spring 104 is sleeved on the inserted link 103, and two ends of the compression spring are fixedly connected with the pressing plate 102 and the limiting pull plate 105 respectively.
When the upper kettle cover is applied, the limiting pull plate 105 is pressed down or pulled up to drive the inserting rod 103 to insert into or withdraw from the slot 107, and when the inserting rod 103 is inserted into the slot 107, the pressing plate 102 presses the top wall of the upper kettle cover 2 under the action of the compression spring 104 (the lower surface of the pressing plate 102 is in close contact with the upper surface of the upper kettle cover 2). When the limiting pull plate 105 is pulled up, the limiting pull plate drives the inserting rod 103 to withdraw from the inserting groove 107, and the inserting can be released.
By arranging the compression spring 104, on one hand, the compression spring 104 can downwards prop against the pressing plate 102 to stably press the upper kettle cover 2 in a normal stretching state, and on the other hand, when the plugging is required to be released, the limiting pull plate 105 is pulled up, so that the compression spring 104 is stretched, and when the limiting pull plate 105 is not pulled up any more, the inserting rod 103 can be quickly and automatically reset to the original position. The upper and lower ends of the compression spring 104 may be connected to the limiting pull plate 105 and the pressing plate 102, respectively, by welding.
The insert rod 103 may be a cylindrical rod or a prismatic rod, for example, a rectangular parallelepiped, and the socket 107 is correspondingly shaped to fit the structure of the insert rod 103.
The dead lever 101 sets up along vertical direction, and its lower extreme is fixed in on the roof of protective housing 1, and clamp plate 102 rotationally overlaps on locating dead lever 101 for compress tightly the cauldron bottom, through making clamp plate 102 rotationally overlap locate on the dead lever 101, so that adjustment clamp plate 102 position makes it no longer compress tightly the cauldron bottom, is convenient for go up the dismantlement of cauldron bottom.
In order to keep the mounting position of the pressing plate 102 on the fixing rod 101 stable all the time, i.e., not to move up and down along the fixing rod 101, the clamping assembly 10 further includes in the embodiment of the present invention: the two anti-falling plates 106 are fixedly sleeved on the fixing rod 101, and the pressing plate 102 is clamped in the fixing rod, so that the pressing plate 102 is clamped between the two anti-falling plates 106, the rotation of the anti-falling plates is not affected, and the lower surface of the anti-falling plates is always leveled with the upper surface of the upper kettle cover 2.
The drop-off preventing plate 106 may be a circular plate, a rectangular plate, etc., and may be coupled to the outside of the fixing rod 101 by a screw connection.
In order to make the moving process of the simulated stratum 6 more stable, in the well cementation cement sheath preparation device provided by the embodiment of the invention, the inner kettle bottom cover 3 is provided with the guide chute 11, and the guide chute 11 extends along the moving direction of the simulated stratum 6; the lower end of the simulated stratum 6 is connected with a slide block 12; when the simulated formation 6 moves horizontally, the slide 12 moves in the guide chute 11.
For example, the guide chute 11 may be an elongated slot of rectangular structure, and its length direction is along the moving direction of the simulated formation 6. The slide 12 may be square or spherical, the width of which is adapted to the width of the guide slot 11, so that when the slide 12 is positioned in the guide slot 11, its side walls extending in the longitudinal direction are in surface contact with the side walls of the guide slot 11 extending in the longitudinal direction.
In one possible implementation, in the embodiment of the present invention, the cross-sectional shapes of the guide chute 11 and the slider 12 are rectangular, so as to facilitate the molding preparation.
Further, in the apparatus for preparing a cement sheath for well cementation provided by the embodiment of the invention, as shown in fig. 4, the guiding chute 11 includes: a body portion 111 and a surplus portion 112 communicating with each other;
wherein the margin portion 112 is configured to provide a moving space for the two simulated formations 6 to interface to eliminate the gap after the contact portion of the two simulated formations 6 wears to create the gap.
So arranged, when the contact portions of the two simulated strata 6 are worn to generate gaps, the simulated strata 6 can be further moved along the allowance portion 112 of the guide chute 11 by the sliding blocks 12 at the bottom of each simulated strata 6, so that the two simulated strata 6 are closely abutted to eliminate the gaps generated by the wear. Thus, the testing precision of the sealing capacity of the cement sheath 8 is improved, and the service life of the preparation device is prolonged.
For example, when the guide chute 11 may be an elongated slot having a rectangular structure and is divided into a main body portion 111 and a margin portion 112 along its length, normally, the slide block 12 at the bottom of the simulated formation 6 slides in the main body portion 111 of the guide chute 11, and only after the simulated formation 6 wears, the slide block 12 at the bottom of the simulated formation 6 slides in the margin portion 112 of the guide chute 11.
The length of the margin portion 112 may be determined according to the thickness of the gap generated by abrasion, and the length of the margin portion 112 may be made larger than the thickness of the gap generated by abrasion.
In the presently disclosed embodiments, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.
The foregoing description is only for the convenience of those skilled in the art to understand the technical solution of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A well cementing cement sheath preparation apparatus, the apparatus comprising: a protective shell with an upper opening, an upper kettle cover, an inner kettle bottom cover, a sleeve, a driving assembly and a simulated stratum;
an insulating layer is arranged on the inner wall of the protective shell, the inner kettle bottom cover is fixedly arranged below the inner part, and the upper kettle cover is covered at the upper opening;
the sleeve is positioned in the middle of the interior of the protective shell, the upper end of the sleeve is fixedly connected with the upper kettle cover, and the lower end of the sleeve is contacted with the upper end of the inner kettle bottom cover;
two semi-cylindrical simulated stratum capable of horizontally moving are symmetrically arranged in the protective shell, the upper end of the simulated stratum is in sliding contact with the upper kettle cover, and the lower end of the simulated stratum is in sliding contact with the inner kettle bottom cover;
an annular cavity is formed between the sleeve and the two simulated strata in the butt joint state and is used for accommodating cement to form a cement ring;
the drive assembly includes: the device comprises a transmission screw, a ball bearing, a threaded sleeve, a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear, a first connecting rod, a second connecting rod, a fixed support and a double-shaft motor;
the threaded sleeve is fixed at the middle position of the outer side wall of the simulated stratum;
the ball bearings are fixed in through holes formed in the side walls of the protective shell and the heat preservation layer;
the transmission screw rod is sleeved inside the ball bearing, one end of the transmission screw rod is in threaded connection with the threaded sleeve, and the other end of the transmission screw rod is fixedly connected with the first bevel gear outside the protective shell;
the fixed support is fixed on the lateral part of the outer wall of the protective shell and is used for supporting a rotatable first connecting rod along the vertical direction, and two ends of the first connecting rod are respectively and fixedly connected with the second bevel gear and the third bevel gear;
the double-shaft motor is fixed at the rear part of the outer wall of the protective shell, one end of the second connecting rod is coaxially connected with one output shaft of the double-shaft motor, and the other end of the second connecting rod is fixedly connected with the fourth bevel gear;
the first bevel gear is meshed with the second bevel gear, and the third bevel gear is meshed with the fourth bevel gear.
2. The apparatus for preparing a well cementing cement sheath as recited in claim 1, wherein the fixed support comprises: the upper support and the lower support are oppositely arranged;
ball bearings are arranged in the upper support and the lower support and are used for sleeving the first connecting rod.
3. The apparatus for preparing a well cementing cement sheath as recited in claim 1, further comprising: and the protective cover is used for covering the part of the driving assembly, which is positioned outside the protective shell.
4. The apparatus for preparing a well cementing cement sheath as recited in claim 1, further comprising: the clamping assembly is used for pressing the upper kettle cover at the upper opening of the protective shell.
5. The apparatus for preparing a well cementing cement sheath as recited in claim 4, wherein the clamping assembly comprises: the device comprises a fixed rod, a pressing plate, an inserting rod, a compression spring and a limiting pull plate;
the lower end of the fixing rod is fixed on the top wall of the protective shell;
the pressing plate is rotatably sleeved on the fixing rod and used for pressing the upper kettle cover;
the inserting rod can vertically movably penetrate through the pressing plate and is inserted into a slot formed in the top wall of the upper kettle cover;
the limiting pull plate is fixed at the upper end of the inserted link;
the compression spring is sleeved on the inserted link, and two ends of the compression spring are fixedly connected with the pressing plate and the limiting pulling plate respectively.
6. The apparatus for preparing a well cementing cement sheath as recited in claim 5, wherein the clamping assembly further comprises: the two anti-falling plates are fixedly sleeved on the fixing rod and clamp the pressing plate in the fixing rod.
7. The device for preparing the well cementation cement sheath according to claim 1, wherein a guide chute is arranged on the bottom cover of the inner kettle, and the guide chute extends along the moving direction of the simulated stratum;
the lower end of the simulated stratum is connected with a sliding block;
when the simulated stratum moves horizontally, the sliding block moves in the guide sliding groove.
8. The apparatus for preparing a well cementing cement sheath as recited in claim 7, wherein the guide chute comprises: a body portion and a remainder portion in communication with each other;
the margin portion is configured to provide a movement space for the two simulated formations to abut to eliminate a gap after the contact portions of the two simulated formations wear to create the gap.
9. The apparatus for preparing a well cementing cement sheath as recited in claim 8, wherein the guide chute and the slider are rectangular in cross-sectional shape.
10. The device for preparing the well cementation cement sheath as claimed in claim 1, wherein the bottom end of the sleeve is fixedly connected with a lifting plate, and the lifting plate is used for supporting the cement sheath;
the upper end of the inner kettle bottom cover is provided with a containing groove for containing the lifting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010440476.2A CN113700451B (en) | 2020-05-22 | 2020-05-22 | Well cementation cement sheath preparation facilities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010440476.2A CN113700451B (en) | 2020-05-22 | 2020-05-22 | Well cementation cement sheath preparation facilities |
Publications (2)
| Publication Number | Publication Date |
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| CN113700451A CN113700451A (en) | 2021-11-26 |
| CN113700451B true CN113700451B (en) | 2023-06-30 |
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| CN202010440476.2A Active CN113700451B (en) | 2020-05-22 | 2020-05-22 | Well cementation cement sheath preparation facilities |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015153823A1 (en) * | 2014-04-04 | 2015-10-08 | Schlumberger Canada Limited | Wellbore cement simulator |
| CN104500034B (en) * | 2014-12-29 | 2017-04-12 | 西南石油大学 | Device and method for evaluating influence of pressure change on completeness of cement sheath |
| CN106522923A (en) * | 2016-11-09 | 2017-03-22 | 中国石油大学(华东) | Oil/gas well cement sheath sealing integrity testing device and method for carrying out evaluation through device |
| CN108533209B (en) * | 2018-04-02 | 2020-07-10 | 中国石油天然气股份有限公司 | Device and method for determining volume stability of well cementation cement |
| CN109030137B (en) * | 2018-06-28 | 2021-07-06 | 中国石油大学(华东) | Experimental device and method for simulating frozen soil stratum cement sheath consolidation |
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2020
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| CN113700451A (en) | 2021-11-26 |
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