CN102826838A - LaMgAl11O19-SiC-Al2O3 complex-phase ceramic material for mud pump liner - Google Patents

Abstract

The invention discloses LaMgAl11O19-SiC-Al2O3 complex-phase ceramic material for a mud pump liner, which belongs to the technical field of special ceramics and wear-resistant materials; LaMgAl11O19 powder and nano SiC powder in sheet-bar structures are led into high-purity aluminum oxide powder; and the LaMgAl11O19-SiC-Al2O3 complex-phase ceramic material is prepared through procedures of material mixing, material forming and high-temperature sintering; the adding quantity of the LaMgAl11O19 powder and the nano SiC powder is regulated so as to realize to toughen and reinforce Al2O3 ceramic; the rigidity and the fracture toughness of the Al2O3 ceramic material are improved; and wear-resistant performance thereof is improved. According to the invention, the wear performance of normal-temperature-resistant liquid-solid abrasive particles is obviously preferable to that of pure aluminum oxide ceramic; and the LaMgAl11O19-SiC-Al2O3 complex-phase ceramic material can be used as the mud pump liner for drilling equipment; the wear-resistant performance of a pump liner is improved; the service life of the pup liner is prolonged; and production demands on of high-efficient drilling of the drilling equipment are satisfied.

Description

A kind of mud slurry pump cylinder jacket is used LaMgAl 11O 19-SiC-Al 2O 3Diphase ceramic material

Technical field

A kind of mud slurry pump cylinder jacket is used LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material belongs to special cermacis and high-abrasive material technical field.

Background technology

The hydrocarbon resources that is prone to exploitation along with shallow-layer is adopted totally gradually; The exploitation of hydrocarbon resources develops to deep-well, ultra deep well drilling technique direction; The difficulty and the cost of exploration are also increasing, simultaneously to also having higher requirement the work-ing life of drilling rigs and down-hole facility.Steam piano is the key equipment of the drilling mud recycle system, is equivalent to the heart of drilling outfit.Its main effect is to carry high-pressure slurry to the shaft bottom, so that at the bottom of the cools reamer head, flushing manhole, and take away the landwaste that produces in the drilling process, and then auxiliary drill bit creeps into.Steam piano military service working condition is very abominable; In the course of the work, what steam piano was carried is a kind of sand, high pressure of containing, and certain viscosity, density and corrosive alkaline drilling fluid medium are arranged; The quality of its use properties can have a direct impact the speed and the quality of drilling well; Must stop to bore maintenance or renewal part in case lose efficacy, and greatly influence the efficient of creeping into, the oil supply pneumatic drill is visited industry and is caused than the large economy benefit.Cylinder sleeve is the crucial consumable accessory of drill pump, and steam piano is transported to the shaft bottom through the to-and-fro movement of piston in cylinder sleeve with mud liquid, and cylinder sleeve and piston are the direct bearing parts of pump pressure.Mud slurry pump cylinder jacket generally will bear the above pressure of 15MPa in the course of the work, and sediment charge is high, and the pH value is 10～12; Cylinder sleeve directly receives the dual function of abrasive wear and dielectric corrosion, when abrasion loss reaches 0.2～0.3mm, causes mud to leak; Pump pressure descends, and causes the cylinder sleeve damage.。After particularly modern steam piano develops into high-power, big discharge capacity, high pressure; It is complicated that the mud liquid composition of being carried also becomes; Therefore, be to improve the technical barrier that drilling rigs job stability and drilling efficiency must solve the work-ing life that prolongs easily worn parts such as mud slurry pump cylinder jacket.

Along with China's rapid economy development and increasingly serious energy situation, require energy resource geology investigation and prospecting amount to increase rapidly, the long life of drilling rigs is had higher requirement.Cylinder sleeve one piston is a friction sealed pair important in the drilling outfit; Mud slurry pump cylinder jacket is as one of component of more or less freely inefficacy in the facility of down-hole; The material that is used as its sliding friction pair also requires high pressure resistant, corrosion-resistant and wear-resistant except the good mechanical performance will be arranged.At present; Mud slurry pump cylinder jacket mainly adopts metal_based materials such as high abrasion cast iron, wear-resisting alloy steel, wimet; But the metal_based material wear resistance is relatively poor, corrosion-resistant (especially under middle high temperature working conditions), work-ing life are shorter, can not satisfy the serialization production requirement of high-level efficiency probing well.In recent years with Al ₂O ₃, ZrO ₂, Sialon etc. for the high firmness stupalith of representative owing to have the hardness height, wear resistance is good, corrosion-resistant, high temperature resistant and frictional coefficient is little etc., and characteristics have caused people's attention.The application facet in high firmness structural ceramic material high-abrasive material field in drilling rigs has obtained certain progress, can reach about 2～5 times of plain metal cylinder sleeve the work-ing life of slurry pump ceramic cylinder jacket.In wear-resistant ceramic material, Al ₂O ₃Pottery is a kind of with low cost and use anti-abrasive material comparatively widely, has the physical strength height, and erosion resistance is good; The wear-resistant premium properties that waits, but as the high-abrasive material in the oil gas drilling technology, its outstanding shortcoming is that toughness is low; Hardness is not good enough, and shock resistance is poor, is easy to generate brittle rupture.Therefore, the present invention is through adding the LaMgAl of en plaque structure in the alumina-ceramic matrix ₁₁O ₁₉Powder and nano SiC powder are through LaMgAl ₁₁O ₁₉The synergy of sheet crystalline substance and nano SiC particle is to realize Al ₂O ₃Ceramic is toughened and reinforced, improves the toughness and the abrasion resistance properties of alumina ceramic material, as mud slurry pump cylinder jacket in the drilling rigs, is a kind of novel wear-resistant ceramic material of oil gas drilling technical field.

Summary of the invention

The present invention proposes the LaMgAl that in aluminum oxide, adds the en plaque structure ₁₁O ₁₉Powder and nano SiC powder preparing go out to have the LaMgAl of good abrasion resistance properties ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material.Through adjustment LaMgAl ₁₁O ₁₉The add-on of powder and nano SiC powder produces toughened and reinforced preferably effect, improves its abrasive wear resistance performance.

A kind of mud slurry pump cylinder jacket is used LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material is characterized in that: with the LaMgAl of en plaque structure ₁₁O ₁₉Powder, nano SiC powder (particle diameter is 0.01～0.8 μ m) and alumina powder jointed (purity>=99.9%; Particle diameter≤5 μ m) is raw material,, obtains the powder of compound then through drying treatment three kinds of raw materials first wet ball grinding 8h-30h in back for preparing burden in proportion; Adopt dry-pressing or slip casting to obtain base substrate; Handle through the 150-300MPa isostatic cool pressing and obtain green compact, green compact carry out sintering at 1400 ℃-1700 ℃ insulation 2h-40h, naturally cool to room temperature and make LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material.

Use LaMgAl according to claims 1 described mud slurry pump cylinder jacket ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material is characterized in that: described LaMgAl ₁₁O ₁₉Powder raw material is with Mg (OH) ₂, Al (OH) ₃And La ₂O ₃Be raw material (it is pure to be chemical analysis) that adopt high temperature solid phase synthesis to obtain in that 1400 ℃-1650 ℃ insulation 2h-20h are synthetic, its addition is 5-20wt%; The nano SiC powder is commercial acquisition, and its addition is 3-12wt%.

The LaMgAl that adopts the present invention to prepare ₁₁O ₁₉-SiC-Al ₂O ₃The diphase ceramic material bending strength reaches as high as 680MPa, and fracture toughness property reaches as high as 5.64MPam ^1/2Vickers' hardness is up to 12.7GPa; Its liquid-solid two-phase of anti-normal temperature abrasive wear behavior obviously is superior to the pure alumina pottery, can replace the wear-resistant metal materials such as antifriction cast iron, wear-resisting alloy steel and wimet in the oil gas drilling industry to be used as the mud slurry pump cylinder jacket in the drilling rigs.

Embodiment

Embodiment 1:

With analytically pure Al (OH) ₃, Mg (OH) ₂, La ₂O ₃As experimental raw, press LaMgAl ₁₁O ₁₉Stoichiometric ratio design batching, ball milling 12h takes out and dry, insulation 4h synthetic powder under 1550 ℃ of conditions respectively then, and the powder after synthetic grinds the LaMgAl that makes the en plaque structure through pulverizing ₁₁O ₁₉Powder.

With the LaMgAl for preparing ₁₁O ₁₉Powder, nano SiC powder and high purity alumina powder are raw material, according to LaMgAl ₁₁O ₁₉Powder 5wt%, 3wt% nano SiC powder, Al ₂O ₃The prescription of powder 92wt% is prepared burden; Ball milling 8h; Ball mill mixing after drying treatment to obtain powder dry-pressing formed under the 25MPa condition, obtain green compact handling through the 180MPa isostatic cool pressing, green compact 1600 ℃ condition in insulation 4h pressureless sintering; Naturally cool to room temperature, can obtain anti abrasive LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material.

Prepared LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃The main performance index bending strength 356MPa of diphase ceramic material, fracture toughness property reaches as high as 4.84MPam ^1/2On MLS-225 type wet type rubber wheel wear testing machine, loading the counterweight of 40N, is that abrasive material carries out the abrasive wear experiment with 40～70 purpose silica sands, and its wear rate is 0.46% after 12800 commentaries on classics (the rubber wheel diameter is 17.8cm) wearing and tearing.

Embodiment 2:

With analytically pure Al (OH) ₃, Mg (OH) ₂, La ₂O ₃As experimental raw, press LaMgAl ₁₁O ₁₉Stoichiometric ratio design batching, ball milling 20h takes out and dry, insulation 10h synthetic powder under 1600 ℃ of conditions respectively then, and the powder after synthetic grinds the LaMgAl that makes the en plaque structure through pulverizing ₁₁O ₁₉Powder.

With the LaMgAl for preparing ₁₁O ₁₉Powder, nano SiC powder and high purity alumina powder are raw material, according to LaMgAl ₁₁O ₁₉Powder 10wt%, 5wt% nano SiC powder, Al ₂O ₃The prescription of powder 85wt% is prepared burden, ball milling 12h, and ball mill mixing is after drying treatment obtains the powder injection forming; Obtain green compact in the processing of process 250MPa isostatic cool pressing; Green compact in insulation 10h pressureless sintering, naturally cool to room temperature 1550 ℃ condition, can obtain anti abrasive LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material.

Prepared LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃The main performance index bending strength 472MPa of diphase ceramic material, fracture toughness property reaches as high as 5.30MPam ^1/2, on MLS-225 type wet type rubber wheel wear testing machine, to load the counterweight of 40N, be that abrasive material carries out the abrasive wear experiment with 40～70 purpose silica sands, its wear rate is 0.42% after 12800 commentaries on classics (the rubber wheel diameter is 17.8cm) wearing and tearing.

Embodiment 3:

With analytically pure Al (OH) ₃, Mg (OH) ₂, La ₂O ₃As experimental raw, press LaMgAl ₁₁O ₁₉Stoichiometric ratio design batching, ball milling 6h takes out and dry, insulation 24h synthetic powder under 1500 ℃ of conditions respectively then, and the powder after synthetic grinds the LaMgAl that makes the en plaque structure through pulverizing ₁₁O ₁₉Powder.

With the LaMgAl for preparing ₁₁O ₁₉Powder, nano SiC powder and high purity alumina powder are raw material, according to LaMgAl ₁₁O ₁₉Powder 15wt%, 10wt% nano SiC powder, Al ₂O ₃The prescription of powder 75wt% is prepared burden, ball milling 16h, and ball mill mixing is after drying treatment obtains the powder injection forming; Obtain green compact in the processing of process 275MPa isostatic cool pressing; Green compact in insulation 6h pressureless sintering, naturally cool to room temperature 1700 ℃ condition, can obtain anti-anti abrasive LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material.

Prepared LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃The main performance index bending strength 675MPa of diphase ceramic material, fracture toughness property reaches as high as 5.64MPam ^1/2, the counterweight of loading 40N on MLS-225 type wet type rubber wheel wear testing machine is that abrasive material carries out the abrasive wear experiment with 40～70 purpose silica sands, its wear rate is 0.37% after 12800 commentaries on classics (the rubber wheel diameter is 17.8cm) wearing and tearing.

Claims (2)

1. a mud slurry pump cylinder jacket is used LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material is characterized in that: with the LaMgAl of en plaque structure ₁₁O ₁₉Powder, nano SiC powder (median size is 0.01～0.8 μ n) and high purity alumina powder (purity>=99.9%, particle diameter≤5 μ m) are raw material, first wet ball grinding 8h-30h after three kinds of raw materials are prepared burden in proportion; Obtain the powder of compound then through drying treatment; Adopt dry-pressing or slip casting to obtain base substrate, handle obtaining green compact again through the 150-300MPa isostatic cool pressing, green compact carry out sintering at 1400 ℃-1700 ℃ insulation 2h-40h; Naturally cool to room temperature, make LaMgAl ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material.

2. use LaMgAl according to claims 1 described mud slurry pump cylinder jacket ₁₁O ₁₉-SiC-Al ₂O ₃Diphase ceramic material is characterized in that: the LaMgAl of described en plaque structure ₁₁O ₁₉Powder is with Mg (OH) ₂, Al (OH) ₃And La ₂O ₃Be raw material, adopt high temperature solid phase synthesis to obtain in that 1400 ℃-1650 ℃ insulation 2h-20h are synthetic, its addition is 5-20wt%; The nano SiC powder is commercial acquisition, and its addition is 3-12wt%.