CN111410942B - Preparation method of seawater drilling composite soil - Google Patents
Preparation method of seawater drilling composite soil Download PDFInfo
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- CN111410942B CN111410942B CN202010387514.2A CN202010387514A CN111410942B CN 111410942 B CN111410942 B CN 111410942B CN 202010387514 A CN202010387514 A CN 202010387514A CN 111410942 B CN111410942 B CN 111410942B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
- B65D53/06—Sealings formed by liquid or plastic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
Abstract
The invention belongs to the technical field of composite soil processing, and particularly relates to a preparation method of seawater drilling composite soil, which comprises a storage tank for storing the seawater drilling composite soil, wherein the storage tank comprises a tank body and a tank cover, the top end of the inner wall of the tank body is provided with a sealing groove, and the bottom end of the sealing groove is provided with a furling cavity; a winding ring is arranged in the winding cavity, the free end of the winding ring is connected with a traction plate, the top end of the traction plate is provided with a motor, and the end part of the motor is connected with the traction plate through a rotating shaft and a winding rope; the seawater drilling composite soil prepared by the method has good salt resistance, filtration reduction and stability, and is stored in a storage box in a block shape through gel, so that the seawater drilling composite soil is convenient to transport and store, and the storage quality of the seawater drilling composite soil can be improved; meanwhile, the seawater drilling composite soil can be directly mixed with seawater to be used, so that the convenience and the high efficiency of the seawater drilling field operation are greatly improved.
Description
Technical Field
The invention belongs to the technical field of composite soil processing, and particularly relates to a preparation method of seawater drilling composite soil.
Background
Drilling formulated drilling fluids are basically prepared in two forms in the offshore, seaside and high-salinity water areas all over the world: one is to add bentonite slurry into fresh water, then add various needed salt-resistant gel-protecting agents to prepare very thick base slurry, and then dilute the base slurry to the needed slurry index by seawater. During construction, slurry is continuously replenished and salt-resistant glue-protecting agent is added. This solution requires continuous fresh water transport and storage to ensure continuous construction. The cost of preparing and maintaining the slurry and storing various salt-resistant gel protectors is high.
In the other method, various salt-resistant gel protectors are used to prepare chemical drilling fluid by seawater, and then bentonite is added to prepare low solid phase polymer drilling fluid, the application of the drilling fluid has limitation, and the method is only suitable for improving the drilling speed under the geological condition of good rock layer or stratum stability.
In view of the above, the invention provides a preparation method of seawater drilling composite soil, the seawater drilling composite soil prepared by the method has good salt resistance, filtration reduction effect and stability, is convenient to operate, safe and environment-friendly, and is convenient to transport and store and can greatly improve the storage quality of the seawater drilling composite soil by storing the seawater drilling composite soil in a storage box in a gel block shape; meanwhile, the seawater drilling composite soil can be directly mixed with seawater to be used, so that the convenience and the high efficiency of the seawater drilling field operation are greatly improved.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides the preparation method of the seawater drilling composite soil, the seawater drilling composite soil prepared by the method has good salt resistance, filtration reduction effect and stability, is convenient to operate, safe and environment-friendly, and is convenient to transport and store and can greatly improve the storage quality of the seawater drilling composite soil by storing the seawater drilling composite soil in a storage box in a block shape through gel; meanwhile, the seawater drilling composite soil can be directly mixed with seawater to be used, so that the convenience and the high efficiency of the seawater drilling field operation are greatly improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of seawater drilling composite soil comprises the following steps:
s1: taking 98-100 parts of raw ore bentonite, carrying out crushing homogenization treatment, then screening the raw ore bentonite with particle size to obtain raw ore soil, simultaneously taking 4-6 parts of sodium carbonate, 0.1-1 part of anhydrous sodium sulphate, 0.1-0.5 part of magnesium salt divalent ion modification auxiliary agent and seawater with the mass of 6-8 times of that of the raw ore soil, mixing and stirring the raw ore soil, obtaining a mixed material, and then piling, aging and drying the mixed material in the sun to obtain modified sodium bentonite; the modified sodium bentonite is obtained by treating the raw ore bentonite, so that an effective raw material is provided for the subsequently prepared seawater drilling composite soil; meanwhile, the raw ore soil and the added components are mixed by using locally-obtained seawater, so that the method is convenient and quick, and the cost of fresh water transportation and storage can be effectively reduced;
s2: after the modified sodium bentonite is obtained in S1, 2-6 parts of salt-resistant fluid loss additive SR1 is mixed with 2-6 parts of guar gum, cross covering modification is carried out, the seawater drilling composite soil is obtained, and then the seawater drilling composite soil is placed in a storage tank; the salt-resistant filtration-reducing effect of the prepared seawater drilling composite soil is greatly enhanced by adding the components with salt resistance and filtration-reducing effect into the modified sodium bentonite;
s3: after the seawater drilling composite soil is obtained in S2, pouring a gelatin water solution with the temperature of 40-50 ℃ into a storage box, and naturally cooling to form a gel layer with the thickness of 1-2mm on the top of the seawater drilling composite soil in the storage box; meanwhile, the seawater drilling composite soil in the storage tank is treated by heated seawater mixing slurry before use; the gelatin aqueous solution is added into the seawater drilling composite soil in the storage box, and a gel layer is formed on the top of the gelatin aqueous solution, so that the seawater drilling composite soil can be stored in the storage box in a blocky manner, the transportation and the storage are convenient, the sealing effect during the storage of the seawater drilling composite soil can be reduced, the deterioration and the failure caused by the direct contact of the seawater drilling composite soil and oxygen in the external environment or a humid environment are reduced, and the storage quality of the seawater drilling composite soil is greatly improved; meanwhile, when the seawater drilling composite soil needs to be used, the seawater which is obtained from local materials and is heated is added into the storage box, so that the gel layer can be quickly dissolved, the seawater drilling composite soil can be directly mixed with the seawater and used, the convenience and the high efficiency in the seawater drilling field operation are greatly improved, and the prepared slurry is easy to keep stable in performance and has a good salt-resistant filtration-reducing effect.
Preferably, the gelatin aqueous solution is formed by mixing seawater at 40-50 ℃ with gelatin powder, and the concentration of the gelatin aqueous solution is kept at 15-20%; during operation, through setting up the concentration of gelatin aqueous solution for gelatin aqueous solution can high efficiency form the gel layer under the state of natural cooling, simultaneously because gelatin aqueous solution is formed by mixing 40-50 ℃ of sea water and gelatin powder, dispose gelatin aqueous solution through using the sea water this moment, not only convenient for obtaining materials, reduce the cost of fresh water configuration, simultaneously when using the sea water of heating to join in marriage thick liquid processing with sea water well drilling compound soil to the gel that gelatin aqueous solution formed, the sea water that the gel was heated to melt and is produced can be used as the sea water of joining in marriage thick liquid this moment, make the utilization that the sea water can abundant cycle, also can promote sea water well drilling compound soil to carry out the efficient and join in marriage thick liquid simultaneously.
Preferably, the mixed material in S1 is stirred and simultaneously subjected to ultrasonic treatment by 200-240W of ultrasonic waves; during operation, the mixed material is treated through the ultrasonic wave while stirring for the raw ore soil in the mixed material can carry out more abundant effectual mixture and effect with the composition that adds under the cavitation of ultrasonic wave, thereby has improved the quality of preparing and preparing efficiency of modified sodium bentonite greatly.
Preferably, the heating temperature of the seawater and seawater drilling composite soil in S3 is kept at 70-80 ℃ when slurry preparation is carried out; when the seawater drilling composite soil needs slurry preparation and use, the seawater is heated to 70-80 ℃ at the moment, so that the gelatin is dissolved in the seawater added into the storage tank while the gelatin is melted, the gelatin aqueous solution is prevented from forming gel in a natural cooling state and influences the slurry preparation of the seawater drilling composite soil, and the slurry preparation quality of the seawater drilling composite soil is greatly improved.
Preferably, the storage box used in S2 includes a box body and a box cover rotatably mounted on one side of the top end of the box body, the top ends of the inner walls of the box body are respectively provided with a sealing groove, and the height of the sealing groove is kept at 1-2 mm; meanwhile, the top end of the seawater drilling composite soil stored in the storage tank is flush with the bottom surface of the sealing groove; the thickness of the gel layer is the same as the height of the sealing groove; when the storage box works, in order to improve the stability and the sealing property of the seawater drilling composite soil in the storage box during transportation and storage, the sealing groove is arranged in the box body, when the top end of the seawater drilling composite soil is level with the bottom surface of the sealing groove, gelatin water solution is added into the box body, the outer edge of a gel layer formed by cooling the top end of the seawater drilling composite soil is filled in the surrounding sealing groove, and the sealing groove can be clamped and acted with the formed gel layer, so that the gel layer clamped in the sealing groove can play a stabilizing and fixing effect on the massive seawater drilling composite soil at the bottom of the gel layer, and the cracking dislocation caused by bumping or external force action during transportation of the massive seawater drilling composite soil formed in the storage box is reduced; simultaneously, the gel layer clamped in the sealing groove can effectively seal the seawater drilling composite soil at the bottom end, so that the stability of the seawater drilling composite soil during transportation and storage is further improved.
Preferably, the bottom end of the sealing groove extends to be flush with the bottom surface of the box body, the inner walls of the box body corresponding to one side of the bottom end of the sealing groove are respectively provided with a furling cavity, and the bottom ends of the side surfaces corresponding to the two symmetrical furling cavities are respectively provided with a sliding opening; a furling ring which can be furled freely is arranged in the furling cavity, a furling shaft is connected to the inside of the furling ring, and two ends of the furling shaft are rotatably connected to the side wall of the box body through torsion springs; the free end of the winding ring penetrates through the sliding opening and extends out of the top end of the box body, the free end of the winding ring is connected with a traction plate, the side wall of the outer end of the traction plate is attached to the side wall of the sealing groove, motors are symmetrically mounted on the inner wall of the box body at the top end of the traction plate, the end part of each motor is connected with a rotating shaft, a winding rope is wound on the side surface of each rotating shaft, and the other end of each winding rope is connected with the top surface of the traction plate; a controller is arranged in the storage box and controls the automatic operation of the storage box; when the storage box is in use, the storage capacity of the storage box is required to be accurately controlled, so that the adaptability of the storage box and the convenience in use are limited, at the moment, the adjusting mechanism is arranged in the storage box, the controller can control the work of the motor to drive the rotating shaft to roll the winding rope, the winding rope drives the traction plate to move upwards while winding, so that the free end of the winding ring moves upwards under the driving of the traction plate and drives the winding shaft in the winding ring to rotate, when the top end of the traction plate moves to a required adjusting position, a cavity matched with the gel layer can be formed between the top end of the traction plate and the top surface of the sealing groove, so that the cavity can correspondingly adjust and adapt according to the height of the seawater drilling composite soil in the box, and the gel layer can be effectively clamped and acted with the cavity, the applicability and the adjusting capability of the storage box are greatly improved.
Preferably, the side walls of the traction plates are connected through a cross-shaped connecting frame, a cylindrical rolling groove is formed in the side face, close to the sealing groove, of each traction plate, a roller made of an elastic rubber material is connected inside the rolling groove in a rolling mode, and the side wall of the roller is in interference fit with the side wall of the sealing groove; a rolling cavity is arranged in the roller, a spring is filled in the rolling cavity along the axial direction of the rolling cavity, and liquid water is filled in the rolling cavity; when the storage box works, in order to enhance the stability of the storage box in working and the sealing effect on the seawater drilling composite soil in the storage box, the traction plates are integrally connected through the arranged connecting frame, so that the integrity of the traction plates around the box and the end part of the furling ring at the bottom of the box in movement is improved, the movement of the traction plates in the vertical direction is limited, the shaking of the traction plates to the middle of the box in the ascending process is reduced, the stability of the storage box in working is improved, meanwhile, the traction plates drive the rollers to slide on the side walls of the sealing groove in the movement process, the friction force generated by the traction plates and the side walls of the sealing groove in the movement process is reduced, and meanwhile, the elastic rollers can be in interference fit with the elastic rollers in the movement process of the side walls of the sealing groove and seal the cavity at the bottom end of the elastic rollers; and through set up spring and liquid water in the roller cavity inside the roller, the effectual elasticity and the adaptability that has increased the roller when rolling on the seal groove lateral wall have reduced roller and seal groove lateral wall because of the too big motion difficulty that leads to of extrusion force, the spring that sets up simultaneously also can strengthen the bending strength and the self-healing ability of roller for the roller can carry out more stable effectual work, thereby further improved the sealed effect of the compound soil of sea water drilling inside the bin.
The invention has the following beneficial effects:
1. the seawater drilling composite soil prepared by the invention has good salt resistance, filtration reduction effect and stability, is convenient to operate, safe and environment-friendly, and is stored in a storage box in a blocky manner through a gel layer, so that the seawater drilling composite soil is convenient to transport and store, and the storage quality of the seawater drilling composite soil can be greatly improved; meanwhile, the composite soil for seawater drilling can be vertical to seawater
2. According to the invention, the sealing groove is arranged in the box body, so that the outer edge of the gel layer formed by cooling the top end of the seawater drilling composite soil can be stably filled in the sealing groove, the stabilization and fixation effects on the massive seawater drilling composite soil at the bottom of the seawater drilling composite soil can be achieved, the seawater drilling composite soil at the bottom end of the seawater drilling composite soil can be more effectively sealed, and the stability of the seawater drilling composite soil during transportation and storage is further improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a diagram of the steps of the present invention;
FIG. 2 is a perspective view of the storage case of the present invention;
FIG. 3 is a schematic view of the storage case of the present invention;
FIG. 4 is an enlarged view at A in FIG. 3;
FIG. 5 is an enlarged view at B in FIG. 3;
in the figure: the device comprises a box body 1, a box cover 11, a sealing groove 12, a motor 13, a winding rope 14, a winding cavity 2, a sliding opening 21, a winding ring 22, a winding shaft 23, a traction plate 3, a connecting frame 31, a rolling groove 32, a roller 33, a rolling cavity 34 and a spring 35.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the following embodiments.
As shown in fig. 1 to 5, the method for preparing the seawater drilling composite soil comprises the following steps:
s1: taking 98-100 parts of raw ore bentonite, carrying out crushing homogenization treatment, then screening the raw ore bentonite with particle size to obtain raw ore soil, simultaneously taking 4-6 parts of sodium carbonate, 0.1-1 part of anhydrous sodium sulphate, 0.1-0.5 part of magnesium salt divalent ion modification auxiliary agent and seawater with the mass of 6-8 times of that of the raw ore soil, mixing and stirring the raw ore soil, obtaining a mixed material, and then piling, aging and drying the mixed material in the sun to obtain modified sodium bentonite; the modified sodium bentonite is obtained by treating the raw ore bentonite, so that an effective raw material is provided for the subsequently prepared seawater drilling composite soil; meanwhile, the raw ore soil and the added components are mixed by using locally-obtained seawater, so that the method is convenient and quick, and the cost of fresh water transportation and storage can be effectively reduced;
s2: after the modified sodium bentonite is obtained in S1, 2-6 parts of salt-resistant fluid loss additive SR1 is mixed with 2-6 parts of guar gum, cross covering modification is carried out, the seawater drilling composite soil is obtained, and then the seawater drilling composite soil is placed in a storage tank; the salt-resistant filtration-reducing effect of the prepared seawater drilling composite soil is greatly enhanced by adding the components with salt resistance and filtration-reducing effect into the modified sodium bentonite;
s3: after the seawater drilling composite soil is obtained in S2, pouring a gelatin water solution with the temperature of 40-50 ℃ into a storage box, and naturally cooling to form a gel layer with the thickness of 1-2mm on the top of the seawater drilling composite soil in the storage box; meanwhile, the seawater drilling composite soil in the storage tank is treated by heated seawater mixing slurry before use; the gelatin aqueous solution is added into the seawater drilling composite soil in the storage box, and a gel layer is formed on the top of the gelatin aqueous solution, so that the seawater drilling composite soil can be stored in the storage box in a blocky manner, the transportation and the storage are convenient, the sealing effect during the storage of the seawater drilling composite soil can be reduced, the deterioration and the failure caused by the direct contact of the seawater drilling composite soil and oxygen in the external environment or a humid environment are reduced, and the storage quality of the seawater drilling composite soil is greatly improved; meanwhile, when the seawater drilling composite soil needs to be used, the seawater which is obtained from local materials and is heated is added into the storage box, so that the gel layer can be quickly dissolved, the seawater drilling composite soil can be directly mixed with the seawater and used, the convenience and the high efficiency in the seawater drilling field operation are greatly improved, and the prepared slurry is easy to keep stable in performance and has a good salt-resistant filtration-reducing effect.
As an embodiment of the invention, the gelatin aqueous solution is prepared by mixing seawater at 40-50 ℃ with gelatin powder, and the concentration of the gelatin aqueous solution is kept at 15-20%; during operation, through setting up the concentration of gelatin aqueous solution for gelatin aqueous solution can high efficiency form the gel layer under the state of natural cooling, simultaneously because gelatin aqueous solution is formed by mixing 40-50 ℃ of sea water and gelatin powder, dispose gelatin aqueous solution through using the sea water this moment, not only convenient for obtaining materials, reduce the cost of fresh water configuration, simultaneously when using the sea water of heating to join in marriage thick liquid processing with sea water well drilling compound soil to the gel that gelatin aqueous solution formed, the sea water that the gel was heated to melt and is produced can be used as the sea water of joining in marriage thick liquid this moment, make the utilization that the sea water can abundant cycle, also can promote sea water well drilling compound soil to carry out the efficient and join in marriage thick liquid simultaneously.
As an embodiment of the invention, the mixture in S1 is subjected to ultrasonic treatment by ultrasonic waves of 200 to 240W while being stirred; during operation, the mixed material is treated through the ultrasonic wave while stirring for the raw ore soil in the mixed material can carry out more abundant effectual mixture and effect with the composition that adds under the cavitation of ultrasonic wave, thereby has improved the quality of preparing and preparing efficiency of modified sodium bentonite greatly.
In one embodiment of the invention, the heating temperature of the seawater and seawater drilling composite soil in S3 is kept at 70-80 ℃ during slurry preparation; when the seawater drilling composite soil needs slurry preparation and use, the seawater is heated to 70-80 ℃ at the moment, so that the gelatin is dissolved in the seawater added into the storage tank while the gelatin is melted, the gelatin aqueous solution is prevented from forming gel in a natural cooling state and influences the slurry preparation of the seawater drilling composite soil, and the slurry preparation quality of the seawater drilling composite soil is greatly improved.
As an embodiment of the present invention, the storage box used in S2 includes a box body 1 and a box cover 11 rotatably installed on one side of the top end of the box body 1, wherein the top ends of the inner walls of the box body 1 are respectively provided with a sealing groove 12, and the height of the sealing groove 12 is maintained at 1-2 mm; meanwhile, the top end of the seawater drilling composite soil stored in the storage tank is flush with the bottom surface of the sealing groove 12; the thickness of the gel layer is the same as the height of the sealing groove 12; when the storage box works, in order to improve the stability and the sealing property of the seawater drilling composite soil in the storage box during transportation and storage, at the moment, the sealing groove 12 is arranged in the box body 1, when the top end of the seawater drilling composite soil is level with the bottom surface of the sealing groove 12, gelatin water solution is added into the box body 1, the outer edge of a gel layer formed by cooling the top end of the seawater drilling composite soil is filled in the surrounding sealing groove 12, at the moment, the sealing groove 12 can be clamped and acted with the formed gel layer, so that the gel layer clamped in the sealing groove 12 can play a stabilizing and fixing effect on the blocky seawater drilling composite soil at the bottom of the gel layer, and the cracking and dislocation caused by the bumping or external force action generated during transportation of the blocky seawater drilling composite soil in the storage box are reduced; meanwhile, the gel layer clamped in the sealing groove 12 can effectively seal the seawater drilling composite soil at the bottom end, so that the stability of the seawater drilling composite soil during transportation and storage is further improved.
As an embodiment of the present invention, the bottom end of the sealing groove 12 extends to be flush with the bottom surface of the box body 1, the inner walls of the box body 1 corresponding to one side of the bottom end of the sealing groove 12 are respectively provided with a furling cavity 2, and the bottom ends of the side surfaces corresponding to the two symmetrical furling cavities 2 are respectively provided with a sliding port 21; a furling ring 22 capable of being furled freely is arranged in the furling cavity 2, a furling shaft 23 is connected to the middle part of the furling ring 22, and two ends of the furling shaft 23 are rotatably connected to the side wall of the box body 1 through torsion springs; the free end of the furling ring 22 penetrates through the sliding opening 21 and extends out to the top end of the box body 1, the free end of the furling ring 22 is connected with the traction plate 3, the outer end side wall of the traction plate 3 is attached to the side wall of the sealing groove 12, the inner wall of the box body 1 at the top end of the traction plate 3 is symmetrically provided with the motor 13, the end part of the motor 13 is connected with a rotating shaft, a furling rope 14 is arranged on the side surface of the rotating shaft in a surrounding mode, and the other end of the furling rope 14 is connected with the top surface; a controller is arranged in the storage box and controls the automatic operation of the storage box; when the storage box works, the storage box needs to accurately control the containing amount of the seawater drilling composite soil in the storage box when in use, so that the adaptability of the storage box and the convenience in use are limited, at the moment, the adjusting mechanism is arranged in the storage box, so that the controller can control the work of the motor 13 to drive the rotating shaft to roll the rolling rope 14, at the moment, the rolling rope 14 drives the traction plate 3 to move upwards while rolling, so that the free end of the rolling ring 22 moves upwards under the driving of the traction plate 3 and drives the rolling shaft 23 in the rolling ring 22 to rotate, when the top end of the traction plate 3 moves to a required adjusting position, a cavity matched with the gel layer can be formed between the top end of the traction plate 3 and the top surface of the sealing groove 12, so that the cavity can correspondingly adjust and adapt according to the height of the seawater drilling composite soil in the box 1, and then make the gel layer can carry out effectual block and effect with this cavity, improved the adaptability and the regulating capacity of bin greatly.
As an embodiment of the invention, the side walls of the traction plate 3 are connected through a cross-shaped connecting frame 31, a cylindrical rolling groove 32 is arranged on the side surface of the traction plate 3 close to the sealing groove 12, a roller 33 made of elastic rubber material is connected inside the rolling groove 32 in a rolling manner, and the side wall of the roller 33 is in interference fit with the side wall of the sealing groove 12; a rolling cavity 34 is arranged inside the roller 33, a spring 35 is filled inside the rolling cavity 34 along the axial direction of the rolling cavity, and liquid water is filled in the rolling cavity 34; when in work, in order to enhance the stability of the storage box in work and the sealing effect on the compound soil of seawater drilling in the storage box, the traction plates 3 are integrally connected through the arranged connecting frames 31, so that the integrity of the traction plates 3 around the box body 1 and the end parts of the furling rings 22 at the bottom of the box body in movement is improved, meanwhile, the motion of the traction plate 3 in the vertical direction can be limited, the shaking of the traction plate 3 to the middle part of the box body 1 in the lifting process is reduced, the stability of the storage box in working is improved, meanwhile, the traction plate 3 drives the roller 33 to slide on the side wall of the sealing groove 12 in the moving process, so that the friction force generated between the traction plate 3 and the side wall of the sealing groove 12 in the moving process is reduced, meanwhile, the elastic roller 33 can always be in interference fit with the side wall of the sealing groove 12 in the process of moving on the side wall of the sealing groove and seal a cavity at the bottom end of the sealing groove; and through setting up spring 35 and liquid water in the roller chamber 34 in the inside of roller 33, the effectual elasticity and the adaptability that has increased roller 33 when rolling on the lateral wall of seal groove 12 have reduced roller 33 and the motion difficulty that the lateral wall of seal groove 12 caused because of the extrusion force is too big, and the spring 35 that sets up also can strengthen the bending strength and the self-resuming ability of roller 33 simultaneously for roller 33 can carry out more stable effectual work, thereby has further improved the sealed effect of the compound soil of sea water drilling in the storage tank.
To verify the effect of adding SR1, a salt-resistant fluid loss additive according to the present invention, the following tests were carried out in examples 1 to 3.
Example 1
100kg of raw ore bentonite is taken for crushing and homogenizing treatment, then the raw ore bentonite is obtained by screening the particle size, 4kg of sodium carbonate, 0.1kg of anhydrous sodium sulphate, 0.1kg of magnesium salt divalent ion modification auxiliary agent and seawater with 6 times of the mass of the raw ore bentonite are simultaneously taken for mixing and stirring treatment to obtain a mixed material, then the mixed material is piled, aged and aired and dried to obtain modified sodium bentonite, then 3kg of guar gum is taken for cross covering modification to obtain seawater drilling composite soil, then the seawater drilling composite soil and the seawater with the same weight are taken for slurry preparation, and the filtration loss of the seawater drilling composite soil and the seawater are measured under the same experimental environment.
Example 2
100kg of raw ore bentonite is taken for crushing and homogenizing treatment, then the raw ore bentonite is obtained by screening the particle size, 4kg of sodium carbonate, 0.1kg of anhydrous sodium sulphate, 0.1kg of magnesium salt divalent ion modification auxiliary agent and seawater with the mass 6 times of that of the raw ore bentonite are simultaneously taken for mixing and stirring treatment to obtain a mixed material, then the mixed material is piled, aged and dried to obtain modified sodium bentonite, then 3kg of salt resistance filtrate reducer SR1 and 3kg of guar gum are taken for mixing and cross covering modification to obtain seawater drilling composite soil, then the seawater drilling composite soil and the seawater with the same weight are taken for preparing slurry, and the filtration loss of the seawater drilling composite soil and the seawater are measured under the same experimental environment.
Example 3
100kg of raw ore bentonite is taken for crushing and homogenizing treatment, then the raw ore bentonite is obtained by screening the particle size, 4kg of sodium carbonate, 0.1kg of anhydrous sodium sulphate, 0.1kg of magnesium salt divalent ion modification auxiliary agent and seawater with the mass 6 times of that of the raw ore bentonite are simultaneously taken for mixing and stirring treatment to obtain a mixed material, then the mixed material is piled, aged and dried to obtain modified sodium bentonite, then 6kg of salt resistance filtrate reducer SR1 and 3kg of guar gum are taken for mixing and cross covering modification to obtain seawater drilling composite soil, then the seawater drilling composite soil and the seawater with the same weight are taken for slurry preparation, and the filtration loss of the seawater drilling composite soil and the seawater are measured under the same experimental environment.
The statistical results of examples 1 to 3 are shown in table one.
Table one
The table one shows that the salt-resistant fluid loss additive SR1 added into the components of the seawater drilling composite soil can effectively play a role in reducing filtration, and under the condition of ensuring that other components are not changed, the filtration loss of the seawater drilling composite soil after slurry preparation is reduced along with the increase of the components of the salt-resistant fluid loss additive SR1, and the filtration reducing effect of the seawater drilling composite soil is enhanced accordingly.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. The preparation method of the seawater drilling composite soil is characterized by comprising the following steps:
s1: taking 98-100 parts of raw ore bentonite, carrying out crushing homogenization treatment, then screening the raw ore bentonite with particle size to obtain raw ore soil, simultaneously taking 4-6 parts of sodium carbonate, 0.1-1 part of anhydrous sodium sulphate, 0.1-0.5 part of magnesium salt divalent ion modification auxiliary agent and seawater with the mass of 6-8 times of that of the raw ore soil, mixing and stirring the raw ore soil, obtaining a mixed material, and then piling, aging and drying the mixed material in the sun to obtain modified sodium bentonite;
s2: after the modified sodium bentonite is obtained in S1, 2-6 parts of salt-resistant fluid loss additive SR1 is mixed with 2-6 parts of guar gum, cross covering modification is carried out, the seawater drilling composite soil is obtained, and then the seawater drilling composite soil is placed in a storage tank;
s3: after the seawater drilling composite soil is obtained in S2, pouring a gelatin water solution with the temperature of 40-50 ℃ into a storage box, and naturally cooling to form a gel layer with the thickness of 1-2mm on the top of the seawater drilling composite soil in the storage box; meanwhile, the seawater drilling composite soil in the storage tank is treated by heated seawater mixing slurry before use;
the gelatin aqueous solution is formed by mixing seawater at 40-50 ℃ with gelatin powder, and the concentration of the gelatin aqueous solution is kept at 15-20%;
stirring the mixed material in S1, and simultaneously performing ultrasonic treatment by using 200-240W ultrasonic waves;
the heating temperature of the seawater and seawater drilling composite soil in the S3 is kept at 70-80 ℃ when slurry preparation is carried out;
the storage box used in the S2 comprises a box body (1) and a box cover (11) rotatably installed on one side of the top end of the box body (1), wherein the top end of the inner wall of the box body (1) is respectively provided with a sealing groove (12), and the height of each sealing groove (12) is kept at 1-2 mm; meanwhile, the top end of the seawater drilling composite soil stored in the storage tank is flush with the bottom surface of the sealing groove (12); the thickness of the gel layer is the same as the height of the sealing groove (12);
the bottom end of the sealing groove (12) extends to be flush with the bottom surface of the box body (1), the inner wall of the box body (1) corresponding to one side of the bottom end of the sealing groove (12) is respectively provided with a furling cavity (2), and the bottom ends of the corresponding side surfaces of the two symmetrical furling cavities (2) are respectively provided with a sliding opening (21); a furling ring (22) capable of being furled freely is arranged in the furling cavity (2), a furling shaft (23) is connected to the middle part of the furling ring (22), and two ends of the furling shaft (23) are rotatably connected to the side wall of the box body (1) through torsion springs; the free end of the winding ring (22) penetrates through the sliding opening (21) and extends out of the top end of the box body (1), the free end of the winding ring (22) is connected with a traction plate (3), the outer end side wall of the traction plate (3) is attached to the side wall of the sealing groove (12), the inner wall of the box body (1) at the top end of the traction plate (3) is symmetrically provided with a motor (13), the end part of the motor (13) is connected with a rotating shaft, a winding rope (14) is wound on the side surface of the rotating shaft, and the other end of the winding rope (14) is connected with the top surface of the traction plate (3) respectively; a controller is arranged in the storage box and controls the automatic operation of the storage box;
the side walls of the traction plate (3) are connected through a cross-shaped connecting frame (31), a cylindrical rolling groove (32) is formed in the side face, close to the sealing groove (12), of the traction plate (3), a roller (33) made of elastic rubber materials is connected inside the rolling groove (32) in a rolling mode, and the side wall of the roller (33) is in interference fit with the side wall of the sealing groove (12); and a rolling cavity (34) is arranged inside the roller (33), a spring (35) is filled inside the rolling cavity (34) along the axial direction of the rolling cavity, and meanwhile, liquid water is filled in the rolling cavity (34).
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| CN107418530A (en) * | 2017-09-05 | 2017-12-01 | 宣化燕北矿业有限责任公司 | A kind of preparation method of seawater drilling well composite earth |
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| US10442972B2 (en) * | 2018-01-29 | 2019-10-15 | King Fahd University Of Petroleum And Minerals | Drilling fluid composition containing treated date pit particles and methods of use thereof |
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| CN108239521A (en) * | 2016-12-23 | 2018-07-03 | 中石化石油工程技术服务有限公司 | A kind of drilling fluid micro emulsion gel and preparation method thereof |
| CN107418530A (en) * | 2017-09-05 | 2017-12-01 | 宣化燕北矿业有限责任公司 | A kind of preparation method of seawater drilling well composite earth |
| CN107523280A (en) * | 2017-09-05 | 2017-12-29 | 宣化燕北矿业有限责任公司 | A kind of thickening filtrate reducing complexing agent for seawater mud and preparation method thereof |
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