CN203672687U - Simulation forming device for drilling fluid mud cakes - Google Patents
Simulation forming device for drilling fluid mud cakes Download PDFInfo
- Publication number
- CN203672687U CN203672687U CN201320799385.3U CN201320799385U CN203672687U CN 203672687 U CN203672687 U CN 203672687U CN 201320799385 U CN201320799385 U CN 201320799385U CN 203672687 U CN203672687 U CN 203672687U
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- CN
- China
- Prior art keywords
- drilling fluid
- autoclave
- storage barrel
- mud cake
- fluid storage
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- Expired - Fee Related
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Abstract
The utility model relates to the field of drilling experiment, in particular to a simulation forming device for drilling fluid mud cakes. The simulation forming device comprises an autoclave and an annular columnar core arranged inside the autoclave, wherein the autoclave comprises an autoclave body and an autoclave cover; a drilling fluid storage barrel is arranged at the upper end of the autoclave cover; the upper end of the drilling fluid storage barrel is connected with a nitrogen gas cylinder through a gas-guide tube; valves are arranged at the upper end and the lower end of the drilling fluid storage barrel respectively; positioning lug bosses matched with the annular columnar core are respectively arranged on the inner bottom surface of the autoclave body and the lower bottom surface of the autoclave cover; a drain pipe is arranged at the bottom of the autoclave body. The thickness of formed mud cakes can be enabled to be uniform through exerting pressure on mud in a simulated borehole through nitrogen gas pressure; mud cakes with different thicknesses and different densities can be manufactured through control to the nitrogen gas pressure and the pressure time. The simulation forming device has a simple device, and is low in cost and easy to popularize and apply.
Description
Technical field
The utility model relates to drilling experiment field, and a kind of drilling fluid mud cake simulation specifically forms device.
Background technology
In actual well drilled process, due to the leak-off effect of drilling fluid, can on the borehole wall, form the mud cake of one deck densification.This mud cake all can have a huge impact well cementing operation and cementing quality afterwards.Therefore,, while carrying out cement mantle sealing experiment correlative study in laboratory, the mud cake that approaches drilling engineering reality in rock core inwall simulation formation is very necessary.The main method of at present, making mud cake in laboratory is to smear drilling fluid on rock core inwall.Mainly there is following shortcoming in this method: 1, the thickness of mud cake is difficult to hold, and mud cake thickness is inhomogeneous, does not have repeatability; 2, the mud cake quality forming is loose, is difficult to produce the fine and close mud cake of high-quality; 3, drilling fluid invaded formation in cannot model engineering reality.
Utility model content
According to above-mentioned weak point, the purpose of this utility model is to provide the simulation of a kind of drilling fluid mud cake and forms device, applies the mud cake thickness that this equipment makes even, has repeatability.
For achieving the above object, the technical solution of the utility model is: a kind of drilling fluid mud cake simulation forms device, it comprises autoclave and is arranged on the circular cylindrical rock core of autoclave inside, autoclave comprises autoclave body and high pressure kettle cover, described autoclave covers end and is provided with drilling fluid storage barrel, the upper end of drilling fluid storage barrel is connected with nitrogen cylinder by wireway, the two ends up and down of drilling fluid storage barrel are respectively equipped with valve, the inner bottom surface of autoclave body is respectively equipped with the bottom surface of high pressure kettle cover the positioning boss matching with circular cylindrical rock core, autoclave body bottom is provided with drainpipe.
Preferably: described positioning boss outer ring is provided with O-ring seal.
Preferably: the described upper and lower two ends of circular cylindrical rock core are respectively equipped with sealing ring.
Preferably: described circular cylindrical rock core outside is provided with protective sleeve.
Preferably: between the upper end of described drilling fluid storage barrel and wireway, be provided with sealed adapter sleeve.
Preferably: the inside of described sealed adapter sleeve is provided with O-ring seal.
Preferably: described valve is spherical valve.
The beneficial effects of the utility model are:
1, this device is exerted pressure to the mud of simulation well intraocular by the pressure of nitrogen, can make the mud cake thickness of formation even;
2, this device, by drilling fluid storage barrel is installed on autoclave, has solved the problem that in the rock core causing because of drilling fluid moisture leak-off, drilling fluid volume reduces;
3, this device is by the control of nitrogen pressure and pressing time, can make the mud cake of different-thickness and different compactness extents;
4, dismountable spherical valve has been installed at the drilling fluid storage barrel two ends of this device, makes to install drilling fluid storage barrel easy to operate, more convenient to the cleaning of drilling fluid storage barrel;
5, this apparatus structure is simple, cheap, is easy to promote the use of.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with specific embodiment, the utility model is described further.
Drilling fluid mud cake simulation as shown in Figure 1 forms device, it comprises autoclave and is arranged on the circular cylindrical rock core 9 of autoclave inside, autoclave comprises autoclave body 3 and high pressure kettle cover 2, described high pressure kettle cover 2 upper ends are provided with drilling fluid storage barrel 1, the upper end of drilling fluid storage barrel 1 is connected with nitrogen cylinder 11 by wireway 6, the two ends up and down of drilling fluid storage barrel 1 are respectively equipped with valve 5, and this valve is preferably spherical valve, are convenient to the installation and removal of drilling fluid storage barrel 1.The inner bottom surface of autoclave body 3 is respectively equipped with the bottom surface of high pressure kettle cover 2 positioning boss 12 matching with circular cylindrical rock core 9, circular cylindrical rock core 9 can be located.Autoclave body 3 bottoms are provided with drainpipe 10.In order to make a confined space of circular cylindrical rock core 9 inner formation, be provided with O-ring seal in positioning boss 12 outer rings and Shang Xia 9, two ends be respectively equipped with sealing ring 7 at circular cylindrical rock core, this sealing ring is preferably stainless steel ring.Excessive and impaired in order to prevent circular cylindrical rock core 9 internal pressures, be provided with protective sleeve 8 in its outside, this protective sleeve is preferably steel bushing.Between the upper end of drilling fluid storage barrel 1 and wireway 6, be provided with sealed adapter sleeve 4, the inside of sealed adapter sleeve 4 is provided with O-ring seal, to ensure the impermeability of drilling fluid storage barrel 1.
The using method of this device is described to complete mud cake manufacturing process as example.
1, join drilling fluid: weigh bentonitic clay, distilled water, adjuvant according to the formula of testing requirements.Adopt grout to stir instrument the raw material weighing up is fully stirred, make the abundant aquation of bentonitic clay.
2, settle rock core: after circular cylindrical rock core 9 two ends are stained with to sealing ring 7, circular cylindrical rock core 9 is positioned in autoclave body 3, is sitting on the positioning boss 12 of autoclave 3 inner bottom surfaces, cover high pressure kettle cover 2.
3, drilling fluid charge: close the valve 5 of drilling fluid storage barrel 1 bottom, open the valve 5 of upper end.With funnel, drilling fluid is injected to drilling fluid storage barrel 1 from drilling fluid storage barrel 1 upper end.Afterwards, close upper end valve 5, drilling fluid storage barrel 1 is contained on high pressure kettle cover 2.Open drilling fluid storage barrel 1, open upper and lower two valves 5, drilling fluid is injected in circular cylindrical rock core 9.The volume of the drilling fluid pouring into can need and determine according to experiment, and the 2-3 of general desirable circular cylindrical rock core internal volume doubly.
4, azine gas cylinder: the wireway 6 nitrogen cylinder 11 being exported with sealed adapter sleeve 4 is connected with the upper end of drilling fluid storage barrel 1.In this device, because the pressure of desired gas is less than 1MPa, so the manometric range in nitrogen cylinder 11 exits is 1MPa, with accurate controlled pressure.
5, form mud cake: open the switch of the drainpipe 10 of autoclave body 3 bottoms, open nitrogen cylinder 11 switches, regulate pressure control valve, make the atmospheric pressure of outlet reach the required pressure of experiment.Writing time, reaching after the time of laboratory necessary requirement, close source of the gas.
6, stripping assembly: close the valve 5 at drilling fluid storage barrel two ends Shang Xia 1, screw out drilling fluid storage barrel 1 and conscientiously clean.Open high pressure kettle cover 2, beat easily out circular cylindrical rock core 9.Rinse out gently the false filter cake on mud cake with slow mobile water, obtain meeting the mud cake of requirement of experiment.
Claims (7)
1. a drilling fluid mud cake simulation forms device, it comprises autoclave and is arranged on the circular cylindrical rock core (9) of autoclave inside, autoclave comprises autoclave body (3) and high pressure kettle cover (2), it is characterized in that: described high pressure kettle cover (2) upper end is provided with drilling fluid storage barrel (1), the upper end of drilling fluid storage barrel (1) is connected with nitrogen cylinder (11) by wireway (6), the two ends up and down of drilling fluid storage barrel (1) are respectively equipped with valve (5), the inner bottom surface of autoclave body (3) is respectively equipped with the bottom surface of high pressure kettle cover (2) positioning boss (12) matching with circular cylindrical rock core (9), autoclave body (3) bottom is provided with drainpipe (10).
2. form device according to drilling fluid mud cake simulation claimed in claim 1, it is characterized in that: described positioning boss (12) outer ring is provided with O-ring seal.
3. form device according to drilling fluid mud cake simulation claimed in claim 1, it is characterized in that: the upper and lower two ends of described circular cylindrical rock core (9) are respectively equipped with sealing ring (7).
4. form device according to the drilling fluid mud cake simulation described in claim 1 or 3, it is characterized in that: described circular cylindrical rock core (9) outside is provided with protective sleeve (8).
5. form device according to drilling fluid mud cake simulation claimed in claim 1, it is characterized in that: between the upper end of described drilling fluid storage barrel (1) and wireway (6), be provided with sealed adapter sleeve (4).
6. form device according to drilling fluid mud cake simulation claimed in claim 5, it is characterized in that: the inside of described sealed adapter sleeve (4) is provided with O-ring seal.
7. form device according to drilling fluid mud cake simulation claimed in claim 1, it is characterized in that: described valve (5) is spherical valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320799385.3U CN203672687U (en) | 2013-12-09 | 2013-12-09 | Simulation forming device for drilling fluid mud cakes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320799385.3U CN203672687U (en) | 2013-12-09 | 2013-12-09 | Simulation forming device for drilling fluid mud cakes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203672687U true CN203672687U (en) | 2014-06-25 |
Family
ID=50968969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320799385.3U Expired - Fee Related CN203672687U (en) | 2013-12-09 | 2013-12-09 | Simulation forming device for drilling fluid mud cakes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203672687U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306976A (en) * | 2019-07-01 | 2019-10-08 | 西南石油大学 | Inert gas injection manages annular space band compression experiment device and its experimental method |
| CN111693455A (en) * | 2020-05-14 | 2020-09-22 | 中国石油大学(北京) | Drilling fluid mud cake generation test method |
| CN111781328A (en) * | 2020-05-14 | 2020-10-16 | 中国海洋石油集团有限公司 | Drilling fluid mud cake generation test shaft simulation mechanism and system |
-
2013
- 2013-12-09 CN CN201320799385.3U patent/CN203672687U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306976A (en) * | 2019-07-01 | 2019-10-08 | 西南石油大学 | Inert gas injection manages annular space band compression experiment device and its experimental method |
| CN111693455A (en) * | 2020-05-14 | 2020-09-22 | 中国石油大学(北京) | Drilling fluid mud cake generation test method |
| CN111781328A (en) * | 2020-05-14 | 2020-10-16 | 中国海洋石油集团有限公司 | Drilling fluid mud cake generation test shaft simulation mechanism and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20141209 |
|
| EXPY | Termination of patent right or utility model |