CN109971053B - Pumping unit wellhead sealing filler with polished rod repairing capability - Google Patents

Pumping unit wellhead sealing filler with polished rod repairing capability Download PDF

Info

Publication number
CN109971053B
CN109971053B CN201910178639.1A CN201910178639A CN109971053B CN 109971053 B CN109971053 B CN 109971053B CN 201910178639 A CN201910178639 A CN 201910178639A CN 109971053 B CN109971053 B CN 109971053B
Authority
CN
China
Prior art keywords
polished rod
pumping unit
filler
sealing filler
repairing capability
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910178639.1A
Other languages
Chinese (zh)
Other versions
CN109971053A (en
Inventor
汤凯
赵浩男
王洪亮
杨海波
张文宇
李静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Petrochina Co Ltd
Daqing Oilfield Co Ltd
Original Assignee
Petrochina Co Ltd
Daqing Oilfield Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Petrochina Co Ltd, Daqing Oilfield Co Ltd filed Critical Petrochina Co Ltd
Priority to CN201910178639.1A priority Critical patent/CN109971053B/en
Publication of CN109971053A publication Critical patent/CN109971053A/en
Application granted granted Critical
Publication of CN109971053B publication Critical patent/CN109971053B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0014—Use of organic additives
    • C08J9/0023—Use of organic additives containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2321/00—Characterised by the use of unspecified rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2427/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
    • C08J2491/06—Waxes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Emergency Medicine (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Sealing Material Composition (AREA)

Abstract

The invention relates to a wellhead sealing filler of an oil pumping unit with polished rod repairing capability. The problem of current polished rod seriously influence the packing and pack sealed effect because of the excessive wearing and tearing that the surface unevenness caused to the packing has mainly been solved. The wellhead sealing filler of the oil pumping unit with the polished rod repairing capability comprises the following components in percentage by mass: 25-50% of rubber particles; 15-20% of epoxy resin; 5-20% of crude wax; 5-10% of SAP resin; 5-15% of chloroethylene copolymer resin; 15-25% of plasticizer and 3-5% of dehumidifying agent; 1-2% of foaming agent; 0.2 to 1.0 percent of curing agent; 5-15% of talcum powder; 5-10% of molybdenum disulfide lithium-based lubricating grease; 3-5% of base oil. This beam-pumping unit well head sealing filler that possesses polished rod repairability can make polished rod surface defect's slot by basically fill and harden, has reached the hot repair effect, has reduced the polished rod because of the excessive wearing and tearing that the surperficial unevenness caused the filler, prolongs the life of packing filler.

Description

Pumping unit wellhead sealing filler with polished rod repairing capability
Technical Field
The invention relates to the technical field of oil extraction engineering of oil fields, in particular to a wellhead sealing filler of an oil pumping unit with polished rod repairing capability.
Background
In recent years, due to the scale promotion of tertiary oil recovery in oil fields, the polished rod of the pumping well is subjected to surface damage caused by electrochemical corrosion, chemical corrosion, electric burn, mechanical scraping and the like due to various factors, the packing filler is also seriously abraded due to the damage of the polished rod, the problem of serious leakage and the like of the well mouth is directly caused, the replacement of the polished rod wastes time and labor, and great troubles are brought to the production of the oil fields.
For the above problems, the current mainstream solution in the industry focuses on popularizing the wear-resistant alloy coating polish rod, for example, patent No. CN200710118049.7, "an anticorrosion ultrahigh-strength pumping polish rod", belongs to a polish rod with nickel alloy powder thermal spraying on the surface, and has high cost, while the polish rod with damaged surface has high repair cost by secondary thermal spraying, and lacks popularization economy. The patent No. CN203547646U describes "a new blowout prevention box" which is to avoid the polished rod from being damaged by the continuous scraping action of the packing box on the polished rod, but its action is a transitional wear or damage to the polished rod. Similar failure patent solutions also include CN2622382Y and CN2608678Y, etc., and there is no reliable low-cost repair technology for now.
Disclosure of Invention
The invention provides a wellhead sealing filler of an oil pumping unit with polished rod repairing capability, aiming at overcoming the problem that the sealing effect of packing filler is seriously influenced by excessive abrasion of the existing polished rod caused by uneven or damaged surface to the filler in the background technology. This beam-pumping unit well head sealing filler that possesses polished rod repairability can repair the polished rod of damage in certain extent, reduces the polished rod because of the excessive wearing and tearing that the surperficial unevenness or damage caused the packing, prolongs the life of packing filler.
The invention can solve the problems by the following technical scheme: the wellhead sealing filler of the oil pumping unit with the polished rod repairing capability comprises the following components in percentage by mass: 25-50% of rubber particles; 15-20% of epoxy resin; 5-20% of crude wax; 5-10% of SAP resin; 5-15% of chloroethylene copolymer resin; 15-25% of plasticizer and 3-5% of dehumidifying agent; 1-2% of foaming agent; 0.2 to 1.0 percent of curing agent; 5-15% of talcum powder; 5-10% of molybdenum disulfide lithium-based lubricating grease; 3-5% of base oil.
The oil pumping machine wellhead sealing filler with polished rod repairing capability has the following functions:
the rubber particles are obtained by crushing waste rubber raw materials with higher purity, such as waste tire side walls, waste inner tubes and the like, by a mechanical method for multiple times, the particle size is 1-10mm, and the impurities are less than 30%.
The epoxy resin is diphenol propane type epoxy resin powder.
The crude wax is any one of a primary paraffin product or semi-refined paraffin; the semi-refined paraffin is 46-58# industrial paraffin.
The SAP resin is polyacrylic acid series super absorbent resin.
The chloroethylene copolymer resin is an epoxy resin colloid tackifier.
The plasticizer is phthalic diester.
The dehumidifying agent is alumina.
The foaming agent is a polyurethane foaming agent.
The curing agent is isocyanate.
The talcum powder is common talcum powder with a size of more than or equal to 1000 meshes and is ground by a dry method and a wet method.
The base oil is paraffin-based mineral oil.
The invention also provides a preparation method of the pumping unit wellhead sealing filler with polished rod repairing capability, which comprises the following steps:
(1) heating rubber particles, vinyl chloride copolymer resin, alumina, phthalic diester, epoxy resin, talcum powder and SAP resin in corresponding formula amount to 50-65 ℃ according to a proportion, and then sending the mixture into a stirrer for continuous premixing and stirring;
(2) heating the crude wax to 80-90 ℃ to melt, adding the molten crude wax into a running stirrer, mixing the molten crude wax with the pre-stirred raw materials, and continuously stirring until the raw materials are completely absorbed and uniformly mixed;
(3) detecting that the temperature of the materials in the stirrer is reduced to below 45 ℃, adding a polyurethane foaming agent, continuously stirring for 20min, adding molybdenum disulfide lubricating grease and base oil, and continuously stirring until the materials are uniformly mixed;
(4) and after the mixed material is cooled to normal temperature and semi-solidified, pouring part of talcum powder again, mixing uniformly, discharging, and sealing and storing.
Compared with the background technology, the invention has the following beneficial effects: the oil pumping unit wellhead sealing filler with polished rod repairing capability is in a scattered particle material state before use, and can be added into wellhead packing boxes of any type singly or mixed with other fillers. After adding, the filler is pressurized and adjusted according to a conventional procedure, the initial high-pressure filler generates heat due to friction with the polish rod, paraffin cores in the filler in a heat affected area are melted, hot melt colloid components consisting of rubber particles, vinyl chloride copolymer resin, aluminum oxide, phthalic diester, epoxy resin and talcum powder and wrapped in the paraffin are released, the volume of the hot melt colloid components expands rapidly, part of hot melt colloid materials are melted and attached to the surface of the polish rod in the reciprocating motion process of the polish rod in a packing box, the rest part of hot melt colloid materials are taken out by the polish rod, colloid educts rapidly fill and level the damaged part of the surface of the polish rod under the repeated scraping action of the packing filler and a gland, the colloid surface is basically dried after the temperature is reduced to be below the melting point of the filler, the filler is rapidly solidified and formed into primary hardening after 2 to 4 hours, and thus the excessive abrasion of the polish rod to the filler due to the uneven surface is, the service life of packing filler is prolonged. After the surface of the polished rod is relatively flat and smooth, the abrasion degree of the packing filler is reduced, the internal temperature is reduced along with the abrasion degree, the colloid is separated out and stops, and the packing filler is in a normal sealing state.
The oil pumping unit wellhead sealing filler with the polished rod repairing capability belongs to a normal-temperature solid hot-melt colloid material, hot melting can occur after the ambient temperature rises to the preset 58 ℃, the semi-fluid colloid is in a semi-fluid state, the semi-fluid colloid has good affinity to a metal material, oil resistance, alkali resistance and water resistance can be realized, filling repair can be performed on the defects of crater shapes, ditch shapes and unevenness of the contact surface of the polished rod, the colloid surface is basically dry when the temperature is reduced to below 58 ℃, and therefore online repairing of the damaged polished rod is realized.
The specific implementation mode is as follows:
the invention will be further illustrated with reference to specific examples:
example 1:
(1) firstly, heating 25kg of rubber particles, 5kg of vinyl chloride copolymer resin, 3kg of alumina, 15kg of phthalic diester, 15kg of epoxy resin powder, 5kg of talcum powder and 5kg of SAP resin in an oven to 50-65 ℃, and then sending the mixture into a stirrer for continuous premixing and stirring;
(2) heating 5kg of No. 46-58 industrial paraffin to 80-90 ℃ for melting, slowly adding the melted industrial paraffin into a running stirrer, mixing the melted industrial paraffin with the pre-stirred raw materials, and continuously stirring until the industrial paraffin is completely absorbed and uniformly mixed;
(3) detecting that the temperature of the materials in the stirrer is reduced to below 45 ℃, adding 1kg of polyurethane foaming agent, continuously stirring for 20min, adding 5kg of molybdenum disulfide lubricating grease and 3kg of base oil, and continuously stirring until the materials are uniformly mixed;
(4) and cooling the mixed material to normal temperature, pouring 2.5kg of partial talcum powder again, mixing uniformly, discharging, and sealing for storage.
Example 2:
(1) firstly, 50kg of rubber particles, 15kg of vinyl chloride copolymer resin, 5kg of alumina, 25kg of phthalic diester, 20kg of epoxy resin powder, 10kg of talcum powder and 10kg of SAP resin are heated to 50-65 ℃, and are sent into a stirrer to be continuously premixed and stirred;
(2) heating 20kg of No. 46-58 industrial paraffin to 80-90 ℃ for melting, adding into a running stirrer, mixing with the pre-stirred raw materials, and continuously stirring until the raw materials are completely absorbed and uniformly mixed;
(3) detecting that the temperature of the materials in the stirrer is reduced to below 45 ℃, adding 2kg of polyurethane foaming agent, continuously stirring for 20min, adding 10kg of molybdenum disulfide lubricating grease and 5kg of base oil, and continuously stirring until the materials are uniformly mixed;
(4) and cooling the mixed material to normal temperature, pouring 5kg of partial talcum powder again, uniformly mixing, discharging, and sealing and storing.
The pumping unit wellhead sealing filler with polished rod repairing capability prepared in the embodiment 1-2 is in a state of scattered particle materials before use, and can be added into wellhead packing boxes of any type singly or mixed with other fillers. After adding, the filler is pressurized and adjusted according to a conventional procedure, the initial high-pressure filler generates heat due to friction with the polish rod, paraffin cores in the filler in a heat affected area are melted, hot melt colloid components consisting of rubber particles, vinyl chloride copolymer resin, aluminum oxide, phthalic diester, epoxy resin and talcum powder and wrapped in the paraffin are released, the volume of the hot melt colloid components expands rapidly, part of hot melt colloid materials are melted and attached to the surface of the polish rod in the reciprocating motion process of the polish rod in a packing box, the rest part of hot melt colloid materials are taken out by the polish rod, colloid educts rapidly fill and level the damaged part of the surface of the polish rod under the repeated scraping action of the packing filler and a gland, the colloid surface is basically dried after the temperature is reduced to be below the melting point of the filler, the filler is rapidly solidified and formed into primary hardening after 2 to 4 hours, and thus the excessive abrasion of the polish rod to the filler due to the uneven surface is, the service life of packing filler is prolonged. After the surface of the polished rod is relatively flat and smooth, the abrasion degree of the packing filler is reduced, the internal temperature is reduced along with the abrasion degree, the colloid is separated out and stops, and the packing filler is in a normal sealing state. The process shows that the uneven part of the polished rod surface achieves the hot repair effect through the hot repair of the filler, and the service life of the filler can be prolonged to more than 20 times.
The pumping unit well head sealing filler with the polished rod repairing capability is mainly applied to the polished rod with damage, so that the well head packing box with the excessive filler abrasion and easy leakage is used, the service life of the polished rod is prolonged through hot repair and cold running of the polished rod, the replacement period of the damaged polished rod is delayed, and the operation cost is reduced.

Claims (6)

1. The utility model provides a beam-pumping unit well head sealing filler that possesses polished rod repairability which characterized in that: the components and the mixture ratio are as follows by mass percent: 25-50% of rubber particles; 15-20% of epoxy resin; 5-20% of crude wax; 5-10% of SAP resin; 5-15% of chloroethylene copolymer resin; 15-25% of plasticizer and 3-5% of dehumidifying agent; 1-2% of foaming agent; 0.2 to 1.0 percent of curing agent; 5-15% of talcum powder; 5-10% of molybdenum disulfide lithium-based lubricating grease; 3-5% of base oil.
2. The pumping unit wellhead sealing filler with polished rod repairing capability according to claim 1, characterized in that: the rubber particles are crushed rubber raw rubber particles with the particle size of 1-10mm, and the impurity content is not more than 30%; the crude wax is any one of a primary paraffin product or semi-refined paraffin; the talcum powder is common talcum powder with a size of more than or equal to 1000 meshes which is ground by a dry method and a wet method; the base oil is paraffin-based mineral oil.
3. The pumping unit wellhead sealing filler with polished rod repairing capability according to claim 2, characterized in that: the semi-refined paraffin is 46-58# industrial paraffin.
4. The pumping unit wellhead sealing filler with polished rod repairing capability according to claim 1, characterized in that: the dehumidifying agent is alumina; the curing agent is isocyanate; the plasticizer is phthalic diester; the foaming agent is a polyurethane foaming agent.
5. The preparation method of the pumping unit wellhead sealing filler with polished rod repairing capability of claim 1 comprises the following steps:
(1) heating rubber particles, vinyl chloride copolymer resin, SAP resin, alumina, phthalic diester, epoxy resin particles and talcum powder with corresponding formula amounts to 50-65 ℃ according to the proportion, and feeding the mixture into a stirrer for continuous premixing and stirring;
(2) heating the crude wax to 80-90 ℃ to melt, adding the molten crude wax into a running stirrer, mixing the molten crude wax with the pre-stirred raw materials, and continuously stirring until the raw materials are completely absorbed and uniformly mixed;
(3) detecting that the temperature of the materials in the stirrer is reduced to below 45 ℃, adding a polyurethane foaming agent, continuously stirring for 20min, adding the molybdenum disulfide lithium-based lubricating grease and the base oil, and continuously stirring until the materials are uniformly mixed;
(4) and cooling the mixed material to normal temperature, pouring part of talcum powder again, mixing uniformly, discharging, and sealing and storing.
6. The preparation method of the pumping unit wellhead sealing filler with the polished rod repairing capability according to claim 5 is characterized in that: the proportions of the talcum powder used in the step (1) and the step (4) are respectively 5-10% and 5%.
CN201910178639.1A 2019-03-11 2019-03-11 Pumping unit wellhead sealing filler with polished rod repairing capability Active CN109971053B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910178639.1A CN109971053B (en) 2019-03-11 2019-03-11 Pumping unit wellhead sealing filler with polished rod repairing capability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910178639.1A CN109971053B (en) 2019-03-11 2019-03-11 Pumping unit wellhead sealing filler with polished rod repairing capability

Publications (2)

Publication Number Publication Date
CN109971053A CN109971053A (en) 2019-07-05
CN109971053B true CN109971053B (en) 2021-06-15

Family

ID=67078417

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910178639.1A Active CN109971053B (en) 2019-03-11 2019-03-11 Pumping unit wellhead sealing filler with polished rod repairing capability

Country Status (1)

Country Link
CN (1) CN109971053B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111500082B (en) * 2020-04-29 2022-03-29 大庆油田有限责任公司 Synthetic sealing filler special for water injection well test blowout prevention pipe and preparation method thereof
CN111997601B (en) * 2020-09-27 2022-07-15 西南石油大学 Device and method for measuring influence of rock debris content on natural gas hydrate drilling erosion
CN112081574A (en) * 2020-09-27 2020-12-15 西南石油大学 Device and method for measuring influence of microbend of natural gas hydrate drilling pipeline on flow field

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0360214A3 (en) * 1988-09-21 1991-03-27 Nitto Denko Corporation Spot-weldable sheet adhesive
CN106633818B (en) * 2015-11-03 2019-10-15 中国石油化工股份有限公司 It is a kind of to run through network structure polymer and preparation method thereof for grouting material
CN107523234A (en) * 2017-08-09 2017-12-29 盐城市宝光车用材料有限公司 A kind of expansion type spot welding glue
CN107345011A (en) * 2017-08-09 2017-11-14 盐城市宝光车用材料有限公司 A kind of high-foaming expansion glue
CN107868375B (en) * 2017-11-13 2020-06-23 上安实业江苏有限公司 Bentonite-based composite water stop strip
CN108047520A (en) * 2018-01-19 2018-05-18 重庆中田化工有限公司 A kind of automobile using environment-friendly type damping expansion glue and preparation method thereof
CN109369997A (en) * 2018-09-29 2019-02-22 嘉科（无锡）密封技术有限公司 A kind of sealing metal rubber and preparation method thereof

Also Published As

Publication number Publication date
CN109971053A (en) 2019-07-05

Similar Documents

Publication Publication Date Title
CN109971053B (en) Pumping unit wellhead sealing filler with polished rod repairing capability
CN109942924B (en) Pumping unit wellhead sealing filler with slow-release self-lubricating function
CN105219271B (en) Uncured phosphorus solid waste modified waterproof asphalt material and its preparation technology
CN103289573A (en) Architectural SBS (styrene-butadiene-styrene) modified asphalt waterproof paint
CN106517207A (en) Method for preparing calcium carbide pellets
CN103897233B (en) A kind of fire-resistant rubber sealing-ring and preparation method thereof
CN103044049A (en) Blast furnace stemming
CN109279894B (en) Graphite drop tank and preparation method thereof
CN110029959B (en) Customized sealing filler applied to wellhead of oil pumping unit under polished rod eccentric condition
CN101423409A (en) Alumina-carbon lining brick for desulphurization hot-metal bottle and technique for producing the same
CN102603335B (en) High-temperate and high-strength carbon daub
CN107323051B (en) A kind of preparation method of dozer liner plate
KR101605307B1 (en) Environmental friendly briquettes and the method for preparing the same
CN109971052B (en) Special sealing filler applied to wellhead of oil pumping unit under high-water-content produced liquid condition
CN103922758A (en) Electrode paste repairing material, and preparation method and use method thereof
CN101503615B (en) Method for preparing single-component high temperature curing sealing material for ironmaking tuyere of blast furnace
CN103275375A (en) Special material for hot spraying of ultra-high molecular weight polyethylene and preparation method thereof
CN108083825B (en) Quick-drying self-flowing castable for permanent layer of regenerated ladle
CN108359257B (en) Structure of warm-mixing regenerant
CN104788864A (en) Preparation method of high-temperature-resistant rubber hose
CN103951934A (en) Bonding antioxidant and its preparation method
CN109943405B (en) Tightness regulator for packing of oil pumping unit wellhead
TWI747741B (en) Thermosetting blast furnace grouting material
CN110372388B (en) SiC combined Si for completely replacing blast furnace cooling wall inlaid brick3N4Castable and preparation method thereof
CN108659779A (en) Pitch natural rubber sticks agent

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant