CN212003154U - A mould is prepared to assembly for testing annular cement ring seals and separates performance device - Google Patents
A mould is prepared to assembly for testing annular cement ring seals and separates performance device Download PDFInfo
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- CN212003154U CN212003154U CN202020536798.2U CN202020536798U CN212003154U CN 212003154 U CN212003154 U CN 212003154U CN 202020536798 U CN202020536798 U CN 202020536798U CN 212003154 U CN212003154 U CN 212003154U
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Abstract
The utility model provides a mould is prepared to assembly for testing annular cement ring seals and separates performance device, include: the mould comprises a mould cylinder, wherein an upper cover and a lower cover are respectively fixed on the top and the bottom of the mould cylinder in a sealing manner; the mold cylinder, the upper cover and the lower cover form a sealed inner space, and a combination body for testing the packing capacity of the cement ring body under high temperature and high pressure, a combination body for testing the packing capacity of the cement ring under non-uniform ground stress, a combination body for testing the packing capacity of the cement ring under the condition that the sleeve is connected back, and a combination body for testing the packing capacity of the cement ring under the formation surrounding rock at the first interface and the second interface are assembled in the inner space. The utility model discloses the key factor to different well structures influence cement sheath integrality is different, has designed different test well section of thick bamboo combinations respectively and corresponds with it to can be more accurate, more be close to the influence law of these key factors of actual test, provide more accurate test means for keeping cement sheath integrality technique.
Description
Technical Field
The utility model relates to a gas well cementing engineering technical field especially relates to a mould is prepared to assembly for testing annular cement ring packing performance device.
Background
The cement sheath is arranged between stratum rock and the casing and mainly used for interlayer isolation and casing protection, and the service life of the shaft is prolonged. In the production process of oil and gas wells, the integrity of a cement sheath can be damaged in the complex underground environment, so that annular channeling is caused, the serious annular channeling can not only lead the subsequent operations of increasing production, exploitation, well repair and the like to be implemented smoothly, but also can influence the well construction period, the oil and gas exploitation and the productivity improvement, even can lead the whole well to be scrapped, and huge economic loss is faced, so that the integrity test of the cement sheath is one of key technologies in well cementation engineering. At present, domestic and foreign researches on a cement sheath integrity testing device have achieved a lot of achievements, such as: the device for visually evaluating the airtightness integrity of the shale gas well multistage fracturing cement sheath comprises the following steps: CN 207296992U; lijun, an experimental apparatus for testing cement ring and casing cementation strength: CN 206386111U; liao Hualin, a kind of oil gas well cement sheath sealing characteristic simulation testing arrangement: CN 204024635U. In actual well conditions, the integrity of the cement sheath is influenced by a plurality of complex factors, such as formation temperature, pressure, formation lithology, non-uniform stress, well cementing process and the like, and each complex factor needs a corresponding wellbore combination to test the integrity of the cement sheath under the influence of the complex factor more accurately. The existing integrity testing device has a single shaft assembly, and many complex factors cannot be correspondingly tested.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the defect that above-mentioned prior art exists, provide a cement ring packing ability test, inhomogeneous ground stress under to high temperature high pressure, cement ring packing ability test, sleeve pipe tieback section cement ring packing ability test and stratum surrounding rock under the cement ring one or two interface packing ability test's assembly prepares mould.
A mould is prepared to assembly for testing annular cement ring packing performance device includes:
the mould comprises a mould cylinder, wherein an upper cover and a lower cover are respectively fixed on the top and the bottom of the mould cylinder in a sealing manner;
the mold cylinder, the upper cover and the lower cover form a sealed inner space, and a combination body for testing the packing capacity of the cement ring body under high temperature and high pressure, a combination body for testing the packing capacity of the cement ring under non-uniform ground stress, a combination body for testing the packing capacity of the cement ring under the condition that the sleeve is connected back, and a combination body for testing the packing capacity of the cement ring under the formation surrounding rock at the first interface and the second interface are assembled in the inner space.
Further, the above-mentioned mold is made for testing the assembly of the device for testing the packing performance of the annular cement ring, and the assembly for testing the packing capacity of the cement ring body under high temperature and high pressure includes:
an inner sleeve and a circular cement sheath;
the inner sleeve is connected with the upper cover and the lower cover through clamping grooves, and the upper cover and the lower cover are connected with the die cylinder through bolts;
and an annular space formed between the outer wall of the inner sleeve and the inner wall of the die cylinder is a pouring space of the circular cement sheath.
Further, the assembly for testing the packing performance of the annular cement ring is used for manufacturing the mold, an inner sleeve outer mud film is attached to the outer wall of the inner sleeve, and the circular cement ring is externally added to the inner sleeve outer mud film.
Further, the above-mentioned mold is made for the assembly of the device for testing the packing performance of the annular cement ring, and the assembly for testing the packing capacity of the cement ring under non-uniform ground stress comprises:
an inner sleeve and an elliptical cement sheath;
the inner sleeve is connected with the upper cover and the lower cover through clamping grooves, and the upper cover and the lower cover are connected with the die cylinder through bolts;
and an annular space formed between the outer wall of the inner sleeve and the inner wall of the die cylinder is a pouring space of the elliptical cement sheath.
Further, according to the above-mentioned mold for manufacturing the assembly of the device for testing the packing performance of the annular cement sheath, the outer wall of the inner sleeve is attached with the inner sleeve outer mud film, and the outer sleeve outer mud film is attached with the elliptical cement sheath.
Further, the above-mentioned mold for manufacturing a combination of devices for testing packing performance of an annular cement ring, the combination for testing packing capacity of a cement ring under casing tieback includes:
an inner sleeve, a circular cement sheath and an outer sleeve;
the inner sleeve is connected with the upper cover and the lower cover through clamping grooves, and the upper cover and the lower cover are connected with the die cylinder through bolts;
the outer sleeve is tightly attached to the inner wall of the die cylinder;
and an annular space formed between the outer wall of the inner sleeve and the inner wall of the outer sleeve is a pouring space of the circular cement sheath.
Further, the mold is manufactured by the assembly of the device for testing the packing performance of the annular cement ring, and an inner sleeve outer mud film is attached to the outer wall of the inner sleeve; the inner wall of the outer sleeve is attached with an inner mud film of the outer sleeve.
Further, the above-mentioned mold is made for testing the assembly of the device for testing the packing performance of the annular cement ring, and the assembly for testing the packing capacity of the cement ring with the second interface under the formation surrounding rock includes:
the device comprises an inner sleeve, a circular cement sheath and simulated surrounding rocks;
the inner sleeve is connected with the upper cover and the lower cover through clamping grooves, and the upper cover and the lower cover are connected with the die cylinder through bolts; the inner wall of the mould cylinder is tightly attached to a layer of the simulated surrounding rock;
and an annular space formed between the outer wall of the inner sleeve and the inner wall of the simulated surrounding rock is a pouring space of the circular cement sheath.
Further, according to the above assembly manufacturing mold for testing the annular cement ring packing performance device, an inner sleeve outer mud film is attached to the outer wall of the inner sleeve, and a simulated surrounding rock inner mud cake is attached to the inner wall of the simulated surrounding rock.
Has the advantages that:
the utility model aims at making 4 kinds of typical pit shaft combinations and making the mould, solve the test problem that 4 kinds of typical influence factors influence the integrality of cement sheath: 1) the cement sheath body packing capability test assembly under high temperature and high pressure solves the test problem of the influence of high temperature and high pressure on the packing performance of the cement sheath body; 2) the cement sheath packing capability test assembly under the non-uniform ground stress solves the test problem of the influence of the non-uniform ground stress on the packing performance of the cement sheath, and 3) the cement sheath packing capability test assembly under the casing tieback solves the test problem of the influence of the cement sheath packing capability of the tieback cementing process; 4) a cement ring two-interface cementing capability test assembly under formation surrounding rock solves the problem of interface cementing quality test evaluation. The utility model discloses the key factor to different well structures influence cement sheath integrality is different, has designed different test well section of thick bamboo combinations respectively and corresponds with it to can be more accurate, more be close to the influence law of these key factors of actual test, provide more accurate test means for keeping cement sheath integrality technique.
Drawings
FIG. 1(a) is a first structural sectional view of a cement ring body packing capability test assembly under high temperature and high pressure without a mud film;
FIG. 1(b) is a structural cross-sectional view of a cement ring body packing capability test assembly under high temperature and high pressure without a mud film;
FIG. 1(c) is a first sectional view of a mold for manufacturing a cement ring body packing capability test assembly under high temperature and high pressure without a mud film;
FIG. 1(d) is a sectional view of a mold manufacturing structure of a cement ring body packing capability test assembly under high temperature and high pressure without a mud film;
FIG. 1(e) is a first structural sectional view of a cement sheath body packing capability test assembly under high temperature and high pressure with a mud film at an interface of the cement sheath;
FIG. 1(f) is a structural section view of a cement sheath body packing capability test assembly under high temperature and high pressure with a mud film at an interface of a cement sheath;
FIG. 1(g) is a sectional view of a first mold manufacturing structure of a cement sheath body packing capability test assembly under high temperature and high pressure with a mud film on a cement sheath interface;
FIG. 1(h) is a sectional view of a mold manufacturing structure of a cement sheath body packing capability test assembly under high temperature and high pressure with a mud film on the interface of a cement sheath I;
FIG. 2(a) is a first structural sectional view of a cement ring packing capability test assembly under non-uniform ground stress in the absence of a mud film;
FIG. 2(b) is a structural section view of a cement ring packing capability test assembly under non-uniform ground stress without a mud film;
FIG. 2(c) is a first sectional view of a mold for manufacturing the assembly for testing the packing capacity of the cement ring under non-uniform ground stress without a mud film;
FIG. 2(d) is a sectional view of a mold manufacturing structure of a cement ring packing capability test assembly under non-uniform ground stress without a mud film;
FIG. 2(e) is a first structural sectional view of the assembly for testing packing capacity of cement sheath under non-uniform ground stress with a mud film at the interface of the cement sheath;
FIG. 2(f) is a structural section view of a cement sheath packing capability test assembly under non-uniform ground stress with a mud film at the interface of the cement sheath I;
FIG. 2(g) is a sectional view of a first mold manufacturing structure of a cement sheath packing capability test assembly under non-uniform ground stress with a cement sheath interface having a mud film;
FIG. 2(h) is a sectional view of a mold manufacturing structure of a cement sheath packing capability test assembly under non-uniform ground stress with a cement membrane at an interface of a cement sheath I;
FIG. 3(a) is a first structural sectional view of a cement ring packing capability test assembly under casing tie-back without a mud film;
FIG. 3(b) is a structural cross-sectional view of a cement ring packing capability test assembly under the condition of no mud film and the casing pipe is connected back;
FIG. 3(c) is a first sectional view of the mold for manufacturing the assembly for testing the packing capacity of the cement ring under the condition of no mud film after the casing is connected back;
FIG. 3(d) is a sectional view of the mold for manufacturing the assembly for testing the packing capacity of the cement ring under the condition of no mud film after the casing is connected back;
FIG. 3(e) is a first structural sectional view of the cement sheath packing capability test assembly under the condition that the casing with the mud film on the first and second interfaces of the cement sheath is connected back;
FIG. 3(f) is a structural section view of a cement sheath packing capability test assembly under the condition that a casing with a mud film on a first interface and a second interface of the cement sheath is connected back;
FIG. 3(g) is a first structural section view of a cement sheath packing capability test assembly under the condition that a casing with a mud film on a first and a second interfaces of the cement sheath is connected back;
FIG. 3(h) is a sectional view of a mold manufacturing structure of a cement sheath packing capability test assembly under the condition that a sleeve with a cement sheath film on a first interface and a second interface of the cement sheath is connected back;
FIG. 4(a) is a first structural section view of a cement ring-two interface packing capability test assembly under formation surrounding rock without a mud film mud cake;
FIG. 4(b) is a structural section view of a cement ring two interface packing capability test assembly under formation surrounding rock under the condition of no mud film mud cake;
FIG. 4(c) is a first section view of a mold for manufacturing a cement ring-two interface packing capability test assembly under formation surrounding rock without a mud film mud cake;
FIG. 4(d) is a sectional view of a mold manufacturing structure of a cement ring two-interface packing capability test assembly under formation surrounding rock without a mud film mud cake;
FIG. 4(e) is a structural section view I of a cement sheath two-interface packing capability test assembly under formation surrounding rock with a cement sheath two-interface and a mud film mud cake;
FIG. 4(f) is a structural section view of a cement sheath two-interface packing capability test assembly under formation surrounding rock with a cement sheath two-interface and a mud film mud cake;
FIG. 4(g) is a sectional view of a first mold manufacturing structure of a first cement sheath interface and second cement sheath interface packing capability test assembly under formation surrounding rock with a first cement sheath interface and a second cement sheath interface in the presence of a mud film mud cake;
FIG. 4(h) is a sectional view of a manufacturing mold structure of a cement sheath two-interface packing capability test assembly under formation surrounding rock with a cement sheath two-interface and a mud film mud cake;
reference numerals:
1-a circular cement sheath; 2-inner sleeve; 3-covering the cover; 4-lower cover; 5-a mold cylinder; 6-bolt; 7-inner sleeve and outer mud film; 7-1-coating mud film in the outer sleeve; 7-2-simulating mud cakes in the surrounding rock; 8-outer sleeve; 9-simulating surrounding rock; 10-oval cement sheath.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The structure of the assembly for testing the sealing capability of the cement ring body under high temperature and high pressure, the assembly for testing the sealing capability of the cement ring under non-uniform ground stress, the assembly for testing the sealing capability of the cement ring under the tie-back of the casing, the assembly for manufacturing the mold, the assembly for testing the sealing capability of the cement ring under the formation surrounding rock and the structure for manufacturing the mold are described as follows:
assembly for testing packing capacity of cement ring body under high temperature and high pressure and manufacturing mold
There are 2 combinations:
1) the assembly without the mud film is shown in fig. 1(a) and 1 (b): the inner sleeve 2 is externally provided with a circular cement sheath 1. The combined product is manufactured into a mold as shown in fig. 1(c) and fig. 1 (d): the inner sleeve 2 is throughThe clamping groove is connected with the upper cover 3 and the lower cover 4, the upper cover 3 and the lower cover 4 are connected with the die cylinder 5 through the bolt 6, and the die cylinder 5 is tightly connected with the die cylinder through the bolt 6. The outer diameter d of the inner sleeve 21Inner diameter d2The outer diameter D of the circular cement sheath 11。
2) The assembly with a cement sheath and a mud film at the interface is shown in fig. 1(e) and 1 (f): the inner sleeve 2 is externally attached with a mud film 7, and the mud film 7 is externally attached with the circular cement sheath 1. The combined product is manufactured into a mold as shown in figure 1(g) and figure 1 (h): the outer wall of the inner sleeve 2 is attached with a mud film 7, the inner sleeve 2 is connected with the upper cover 3 and the lower cover 4 through clamping grooves, the upper cover 3 and the lower cover 4 are connected with the mold cylinder 5 through bolts 6, and the mold cylinder 5 is tightly connected together through the bolts 6. The outer diameter d of the inner sleeve 21Inner diameter d2The outer diameter D of the circular cement sheath 11。
Assembly for testing cement ring packing ability under non-uniform ground stress and its making mould
There are 2 combinations:
1) the assembly without the mud film is shown in fig. 2(a) and 2 (b): an elliptical cement sheath 10 is additionally arranged on the inner sleeve 2. The combined product is manufactured into a mold as shown in fig. 2(c) and fig. 2 (d): the inner sleeve 2 is connected with the upper cover 3 and the lower cover 4 through clamping grooves, the upper cover 3 and the lower cover 4 are connected with the die cylinder 5 through bolts 6, and the die cylinder 5 is tightly connected together through the bolts 6. The outer diameter d of the inner sleeve 23Inner diameter d4The major diameter D of the oval cement sheath 102Minor diameter D3The ratio of the long diameter to the short diameter can be adjusted according to the requirement.
2) The assembly with a cement sheath and a mud film at the interface is shown in fig. 2(e) and 2 (f): the inner sleeve 2 is externally attached with a mud film 7, and the mud film 7 is externally attached with an elliptical cement sheath 10. The combined product is manufactured into a mold as shown in fig. 2(g) and fig. 2 (h): the outer wall of the inner sleeve 2 is attached with a mud film 7, the inner sleeve 2 is connected with the upper cover 3 and the lower cover 4 through clamping grooves, the upper cover 3 and the lower cover 4 are connected with the die cylinder 5 through bolts 6, and the die cylinder 5 is tightly connected together through the bolts 6. The outer diameter d of the inner sleeve 23Outer diameter d4The major diameter D of the oval cement sheath 102Minor diameter D3The ratio of the long diameter to the short diameter can be adjusted according to the requirement.
Thirdly, aiming at the assembly for testing the packing capacity of the cement ring under the condition of casing tie-back and the manufacturing mold
There are 2 combinations:
1) the assembly without the mud film is shown in fig. 3(a) and 3 (b): the inner sleeve 2 is externally provided with a circular cement sheath 1, and the circular cement sheath is externally provided with an outer sleeve 8. The combined product forming mold is shown in fig. 3(c) and 3 (d): the inner sleeve 2 is connected with the upper cover 3 and the lower cover 4 through clamping grooves, the upper cover 3 and the lower cover 4 are connected with the die cylinder 5 through bolts 6, the die cylinder 5 is closely connected with the die cylinder 5 through bolts 6, and an outer sleeve 8 tightly attached to the inner wall is arranged in the assembling die 5. The outer diameter d of the inner sleeve 25Inner diameter d6The outer diameter D of the circular cement sheath4Outer diameter d of the outer sleeve7。
2) The assembly of the cement sheath with the mud film on the first and second interfaces is shown in fig. 3(e) and 3 (f): an inner sleeve 2 is externally attached with an inner sleeve outer mud film 7, the inner sleeve outer mud film 7 is externally attached with a circular cement sheath 1, the circular cement sheath 1 is externally attached with an outer sleeve 8, and the outer sleeve 8 is internally attached with a mud film 7-1. The combined product is manufactured into a mold as shown in fig. 3(g) and fig. 3 (h): the outer wall of the inner sleeve 2 is attached with an inner sleeve outer mud film 7, the inner sleeve 2 is connected with the upper cover 3 and the lower cover 4 through clamping grooves, the upper cover 3 and the lower cover 4 are connected with the die cylinder 5 through bolts 6, the die cylinder 5 is tightly connected together through the bolts 6, the outer sleeve 8 is internally provided with an outer sleeve 7 tightly attached to the inner wall, and the inner wall of the outer sleeve 8 is attached with a mud film 7-1. The outer diameter d of the inner sleeve 25Inner diameter d6The outer diameter D of the circular cement sheath4Outer diameter d of the outer sleeve7。
And fourthly, 2 assemblies exist in the assembly for testing the sealing capacity of the first interface and the second interface of the cement ring under the formation surrounding rock and the manufactured mould:
1) the combination body without the mud film mud cake is shown in fig. 4(a) and 4 (b): the inner sleeve 2 is externally provided with a circular cement sheath 1, and the cement sheath is externally provided with a simulated surrounding rock 9. The combined product forming mold is shown in fig. 4(c) and 4 (d): the inner sleeve 2 is connected with the upper cover 3 and the lower cover 4 through clamping grooves, and the upper cover 3 and the lower cover 4 are communicatedThe bolt 6 is connected with the mould cylinder 5, the mould cylinder 5 is tightly connected together through the bolt 6, and a simulated surrounding rock 9 tightly attached to the inner wall is arranged in the mould cylinder 5. The outer diameter d of the inner sleeve 28Inner diameter d9(ii) a The outer diameter D of the circular cement sheath5(ii) a The simulated surrounding rock 9 outer diameter D6. And the simulated surrounding rock 9 is divided into a plurality of times, rock rings with the same size are taken from the rock core, and after the sections of the multi-section rock rings are coated with the impermeable material, the multi-section rock rings are cemented together by using the cementing agent.
2) The combination body of the cement sheath with the mud film mud cake on the first and second interfaces is shown in fig. 4(e) and 4 (f): an inner sleeve 2 is externally attached with an inner sleeve outer mud film 7, the inner sleeve outer mud film 7 is externally attached with a circular cement sheath 1, the circular cement sheath 1 is externally attached with a simulated surrounding rock 9, and the inner wall of the simulated surrounding rock 9 is attached with a simulated surrounding rock inner mud cake 7-2. The combined product is manufactured into a mold as shown in fig. 4(g) and fig. 4 (h): the outer wall of the inner sleeve 2 is provided with an inner sleeve outer mud film 7, the inner sleeve 2 is connected with the upper cover 3 and the lower cover 4 through clamping grooves, the upper cover 3 and the lower cover 4 are connected with the mold barrel 5 through bolts 6, the mold barrel 5 is closely connected together through the bolts 6, a simulation surrounding rock 9 tightly attached to the inner wall is arranged in the mold barrel 5, and the inner wall of the simulation surrounding rock 9 is provided with a simulation surrounding rock inner mud cake 7-2. The outer diameter d of the inner sleeve 28Inner diameter d9(ii) a The outer diameter D of the circular cement sheath5(ii) a The simulated surrounding rock 9 outer diameter D6. And the simulated surrounding rock 9 is divided into a plurality of times, rock rings with the same size are taken from the rock core, and after impermeable materials are coated on the cross section of the multi-section rock ring, a plurality of rock rings are cemented together by using a cementing agent.
The method comprises the following steps of aiming at a cement ring body packing capability test assembly under high temperature and high pressure, a cement ring packing capability test assembly under non-uniform ground stress, a cement ring packing capability test assembly under casing tie-back and a cement ring two-interface packing capability test assembly under formation surrounding rock:
first, a molding implementation step for a cement ring body packing capability test assembly under high temperature and high pressure
1) The implementation steps of preparing the assembly for testing the packing capability of the cement sheath without the mud film under the conditions of high temperature and high pressure are shown in figures 1(a), (b), (c) and (d):
the inner sleeve 2 is fixed in a clamping groove of the bottom cover 4, and the bottom cover 4 and the die cylinder 5 are tightly connected together through a bolt 6 to form an annular space.
Secondly, injecting prepared cement paste into the annular space, covering the upper cover 3 after the annular space is filled with the cement paste, and tightly connecting the upper cover 2 and the mould cylinder 5 together through the bolt 6.
Putting the whole mould into a high-temperature high-pressure curing kettle, curing for a certain age period under the conditions of set pressure and temperature, taking out the mould, and removing the mould to obtain a combined body.
2) The implementation steps of preparing the cement sheath body packing capability test assembly under high temperature and high pressure with the cement sheath interface having the mud film are shown in fig. 1(e), (f), (g) and (h):
putting the inner sleeve 2 into the drilling fluid to wash for n hours to attach a layer of inner sleeve outer mud film 7 to the outer wall of the inner sleeve 2;
secondly, the inner sleeve 2 is fixed in a clamping groove of the bottom cover 4, and the bottom cover 4 and the die cylinder 5 are tightly connected together through a bolt 6 to form an annular space.
Thirdly, injecting the prepared cement paste into the annular space, covering the upper cover 3 after the annular space is filled with the cement paste, and tightly connecting the upper cover 2 with the mold cylinder 5 through the bolt 6.
And fourthly, placing the whole mould into a high-temperature high-pressure curing kettle, curing for a certain age period under the conditions of set pressure and temperature, taking out the mould, and removing the mould to obtain the combined body.
Second, a molding implementation step of the cement ring packing capability test assembly under non-uniform ground stress
1) The implementation steps of preparing the assembly for testing the packing capacity of the cement ring under the condition of non-uniform ground stress without the mud film are shown in FIGS. 2(a), (b), (c) and (d):
firstly, the inner sleeve 2 is fixed in a clamping groove of the bottom cover 4, and the base 4 and the die cylinder 5 are tightly connected together through a bolt 6 to form an annular space.
Secondly, injecting prepared cement paste into the annular space, covering the upper cover 3 after the annular space is filled with the cement paste, and tightly connecting the upper cover 3 and the mold cylinder 5 together through the bolt 6.
Putting the whole mould into a high-temperature high-pressure curing kettle, curing for a certain age period under the conditions of set pressure and temperature, taking out the mould, and removing the mould to obtain a combined body. The elliptical-cylindrical combination can simulate the condition that the cement sheath is unevenly stressed underground.
2) The implementation steps of the cement sheath packing capability test assembly under the nonuniform ground stress with the cement sheath interface are shown in fig. 2(e), (f), (g) and (h):
putting the inner sleeve 2 into the drilling fluid to wash for n hours to attach a layer of inner sleeve outer mud film 7 to the outer wall of the inner sleeve 2;
secondly, the inner sleeve 2 is fixed in a clamping groove of the bottom cover 4, and the base 4 and the die cylinder 5 are tightly connected together through a bolt 6 to form an annular space.
Thirdly, injecting the prepared cement paste into the annular space, covering the upper cover 3 after the annular space is filled with the cement paste, and tightly connecting the upper cover 3 with the mold cylinder 5 through the bolt 6.
And fourthly, placing the whole mould into a high-temperature high-pressure curing kettle, curing for a certain age period under the conditions of set pressure and temperature, taking out the mould, and removing the mould to obtain the combined body. The elliptical-cylindrical combination can simulate the condition that the cement sheath is unevenly stressed underground.
Third, a molding implementation step of the cement ring packing capability test assembly under casing tie-back
1) The implementation steps of the cement ring packing capability test assembly under the condition of preparing the casing pipe with no mud film and connected back are shown in fig. 3(a), (b), (c) and (d):
firstly, the inner sleeve 2 is fixed in a clamping groove of the bottom cover 4, the base 4 is tightly connected with the die cylinder 5 through a bolt 6, and the outer sleeve 8 is placed to be tightly attached to the inner wall of the die cylinder 5 to form an annular space.
Secondly, injecting prepared cement paste into the annular space, covering the upper cover 3 after the annular space is filled with the cement paste, and tightly connecting the upper cover 3 and the mold cylinder 5 together through the bolt 6.
Putting the whole mould into a high-temperature high-pressure curing kettle, curing for a certain age period under the conditions of set pressure and temperature, taking out the mould, and removing the mould to obtain a combined body.
2) The implementation steps of the cement sheath packing capability test assembly under the condition that the casing with the cement sheath having the mud film on the first and second interfaces is connected back are shown in figures 3(e), (f), (g) and (h):
firstly, respectively putting an inner sleeve 2 and an outer sleeve 8 into drilling fluid to wash for n hours, so that a layer of inner mud film 7-1 of the outer sleeve is attached to the outer wall of the inner sleeve 2 and the inner wall of the outer sleeve 8;
secondly, the inner sleeve 2 is fixed in a clamping groove of the bottom cover 4, the base 4 is tightly connected with the die cylinder 5 through the bolt 6, and the outer sleeve 8 is tightly attached to the inner wall of the die cylinder 5 to form an annular space.
Thirdly, injecting the prepared cement paste into the annular space, covering the upper cover 3 after the annular space is filled with the cement paste, and tightly connecting the upper cover 3 with the mold cylinder 5 through the bolt 6.
And fourthly, placing the whole mould into a high-temperature high-pressure curing kettle, curing for a certain age period under the conditions of set pressure and temperature, taking out the mould, and removing the mould to obtain the combined body.
Fourth, a mold making implementation step of the assembly for testing the sealing capability of the first interface and the second interface of the cement ring under the formation surrounding rock
1) The implementation steps of the assembly for testing the sealing capability of the cement ring-two interface under the formation surrounding rock under the condition of preparing the mud cake without the mud film are shown in the figures 4(a), (b), (c) and (d):
firstly, the inner sleeve 2 is fixed in a clamping groove of the bottom cover 4, the base 4 is tightly connected with the die cylinder 5 through the bolt 6, and the simulated surrounding rock 9 is placed to be tightly attached to the inner wall of the die cylinder 5 to form an annular space.
Secondly, injecting prepared cement paste into the annular space, covering the upper cover 2 after the annular space is filled with the cement paste, and tightly connecting the upper cover 2 and the mold cylinder 5 together through the bolt 6.
Putting the whole mould into a high-temperature high-pressure curing kettle, curing for a certain age period under the conditions of set pressure and temperature, taking out the mould, and removing the mould to obtain a combined body.
2) The implementation steps of the assembly for testing the packing capacity of the first interface and the second interface of the cement sheath under the formation surrounding rock with the first interface and the second interface of the cement sheath and the mud film mud cake are shown in figures 4(e), (f), (g) and (h):
firstly, respectively putting the inner sleeve 2 and the simulated surrounding rock 9 into drilling fluid to be washed for n hours, so that a layer of inner sleeve outer mud film 7 is attached to the outer wall of the inner sleeve 2, and a layer of simulated surrounding rock inner mud cake 7-2 is respectively formed on the inner wall of the simulated surrounding rock 9;
secondly, the inner sleeve 2 is fixed in a clamping groove of the bottom cover 4, the base 4 is tightly connected with the die cylinder 5 through the bolt 6, and the simulated surrounding rock 9 is placed to be close to the inner wall of the die cylinder 5 to form an annular space.
Thirdly, injecting the prepared cement paste into the annular space, covering the upper cover 3 after the annular space is filled with the cement paste, and tightly connecting the upper cover 3 with the mold cylinder 5 through the bolt 6.
And fourthly, placing the whole mould into a high-temperature high-pressure curing kettle, curing for a certain age period under the conditions of set pressure and temperature, taking out the mould, and removing the mould to obtain the combined body.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. The utility model provides a mould is prepared to assembly for testing annular cement ring seals and separates performance device which characterized in that includes:
the mould comprises a mould cylinder (5), wherein an upper cover (3) and a lower cover (4) are respectively fixed on the top and the bottom of the mould cylinder (5) in a sealing manner;
the mold barrel (5), the upper cover (3) and the lower cover (4) form a sealed inner space, and a combination body for testing the sealing capacity of the cement ring body under high temperature and high pressure, a combination body for testing the sealing capacity of the cement ring under non-uniform ground stress, a combination body for testing the sealing capacity of the cement ring under casing pipe tie-back and a combination body for testing the sealing capacity of the cement ring under stratum surrounding rock with a second interface.
2. The combination manufacturing mold for testing the annular cement sheath packing performance device of claim 1, wherein the combination for testing the packing capacity of the cement sheath body under high temperature and high pressure comprises:
an inner sleeve (2) and a circular cement sheath (1);
the inner sleeve (2) is connected with the upper cover (3) and the lower cover (4) through clamping grooves, and the upper cover (3) and the lower cover (4) are connected with the die cylinder (5) through bolts (6);
and an annular space formed between the outer wall of the inner sleeve (2) and the inner wall of the die cylinder (5) is a pouring space of the circular cement sheath (1).
3. The combined body manufacturing mold for the device for testing the packing performance of the annular cement sheath according to claim 2, characterized in that an inner sleeve outer mud film (7) is attached to the outer wall of the inner sleeve (2), and the inner sleeve outer mud film (7) is attached to the circular cement sheath (1).
4. The combination preparation mold for testing the annular cement sheath packing performance device of claim 1, wherein the combination for testing the non-uniformly ground stressed cement sheath packing capacity comprises:
an inner sleeve (2) and an elliptical cement sheath (10);
the inner sleeve (2) is connected with the upper cover (3) and the lower cover (4) through clamping grooves, and the upper cover (3) and the lower cover (4) are connected with the die cylinder (5) through bolts (6);
and an annular space formed between the outer wall of the inner sleeve (2) and the inner wall of the die cylinder (5) is a pouring space of the elliptical cement sheath (10).
5. The combination manufacturing mold for the device for testing the packing performance of the annular cement sheath according to claim 4 is characterized in that an inner sleeve outer mud film (7) is attached to the outer wall of the inner sleeve (2), and the inner sleeve outer mud film (7) is attached to the oval cement sheath (10).
6. The combination preparation mold for testing the annular cement sheath packing performance device of claim 1, wherein the combination for testing the cement sheath packing capacity under casing tieback comprises:
the inner sleeve (2), the circular cement sheath (1) and the outer sleeve (8);
the inner sleeve (2) is connected with the upper cover (3) and the lower cover (4) through clamping grooves, and the upper cover (3) and the lower cover (4) are connected with the die cylinder (5) through bolts (6);
the outer sleeve (8) is tightly attached to the inner wall of the die cylinder (5);
and an annular space formed between the outer wall of the inner sleeve (2) and the inner wall of the outer sleeve (8) is a pouring space of the circular cement sheath (1).
7. The combined product preparation mould for the device for testing the packing performance of the annular cement sheath is characterized in that an inner sleeve outer mud film (7) is attached to the outer wall of the inner sleeve (2); the inner wall of the outer sleeve (8) is attached with an inner cement film (7-1) of the outer sleeve.
8. The mold for manufacturing the assembly of the device for testing the packing performance of the annular cement sheath according to claim 1, wherein the assembly for testing the packing capacity of the cement sheath at the two interfaces under the formation surrounding rock comprises:
the inner sleeve (2), the circular cement sheath (1) and the simulated surrounding rock (9);
the inner sleeve (2) is connected with the upper cover (3) and the lower cover (4) through clamping grooves, and the upper cover (3) and the lower cover (4) are connected with the die cylinder (5) through bolts (6); the inner wall of the mould cylinder (5) is tightly attached to a layer of the simulated surrounding rock (9);
and an annular space formed between the outer wall of the inner sleeve (2) and the inner wall of the simulated surrounding rock (9) is a pouring space of the circular cement sheath (1).
9. The combination manufacturing mold for testing the annular cement sheath packing performance device of claim 8,
an inner sleeve outer mud film (7) is attached to the outer wall of the inner sleeve (2), and a simulated surrounding rock inner mud cake (7-2) is attached to the inner wall of the simulated surrounding rock (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020536798.2U CN212003154U (en) | 2020-04-13 | 2020-04-13 | A mould is prepared to assembly for testing annular cement ring seals and separates performance device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020536798.2U CN212003154U (en) | 2020-04-13 | 2020-04-13 | A mould is prepared to assembly for testing annular cement ring seals and separates performance device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115266307A (en) * | 2022-08-04 | 2022-11-01 | 西南石油大学 | Test device for testing erosion of high-temperature and high-pressure oil well pipe with cement sheath |
| CN115749645A (en) * | 2022-12-06 | 2023-03-07 | 西南石油大学 | Device for preparing filter cake under simulated high-permeability variable-pressure stratum |
-
2020
- 2020-04-13 CN CN202020536798.2U patent/CN212003154U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115266307A (en) * | 2022-08-04 | 2022-11-01 | 西南石油大学 | Test device for testing erosion of high-temperature and high-pressure oil well pipe with cement sheath |
| CN115749645A (en) * | 2022-12-06 | 2023-03-07 | 西南石油大学 | Device for preparing filter cake under simulated high-permeability variable-pressure stratum |
| CN115749645B (en) * | 2022-12-06 | 2024-04-16 | 西南石油大学 | Filter cake preparation facilities under simulation hypertonic pressure variation stratum |
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