One, what is oil uses a pipe?

Oil uses a pipe(also call oil special canal) the floorboard that is all steel tube that get job of explore, exploitation with Yu Shi oil and natural gas. It formed wildcat " framework " and " hemal " , its quality matters to the security that artesian well works, efficiency and cost directly.

Because its work environment is extremely harsh (corrode high pressure, high temperature, high, complex stress) , oil uses a canal to having firm demand to material, workmanship and quality control.

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2, the ultimate cluster that oil uses a pipe (by utility)

This is the part that understands oil to use tubal key, normally cent is two cardinal principle to fasten:

System one: Wildcat is in charge of (OCTG - Oil Country Tubular Goods)

This is the core that oil uses a pipe, point to build a well (dig a well) the special steel tube that needs in the process. Basically include the following 3 kinds, they resemble " Russia covers child " in covering a ground one layer to put a well euqally:

1. Drill pipe

• Two end have add thick connect, callTool connect, solder to join with body through attrition.

• Body bears massive pulling force, pressure, torsional and curve stress.

• It is hollow among, use at carrying fluid of high-pressured artesian well.

• Function: Join drill collar and artesian well platform, tranit torque and artesian well fluid, be artesian well " tranission shaft " .

• Characteristic:

• Mark: Drill pipe paints normallyArgent.

Bushing

• Be wildcat " advocate structure " , dosage is big.

• Differ according to leaving deepness and function, cent isSurface layer bushing, technology bushing, production bushing.

• Force of the extruding force outside bearing, internal pressure and axial are tensile.

• Pass specialWhorl (bushing whorl)Join.

• Function: Go to next entering from wellhead inside the well, Add well cementation wall, prevent layer collapse; Lie between different layer(be like layer of oil reservoir, water, high pressure layer) ; Form pit shaft, offer a channel for follow-up production.

• Characteristic:

• Mark: Bushing paints normallyGreenOr other facial expression (but blame is argent) .

Vitta

• Size is aller than bushing.

• Bear pulling force of internal pressure, axial and corrode (direct contact yields fluid) .

• Pass nicety likewiseWhorl (vitta whorl)Join.

• Function: Issue manufacturing bushing interior, asFrom oil reservoir draw-out oil or natural gas arrive the passageway of the ground.

• Characteristic:

• Mark: Vitta paints normallyBlue.

Compare simply:

• Drill pipeThe broach rod that uses when = construction (finishing hind should take out) .

• BushingWhen = builds a house, hit " the picket that protect a wall " and " next conduit " , it is permanent structure.

• Vitta= is covered in " next water pipeline " inside " feed pipe " , be in charge of be being carried eventually.

System 2: Oil gas duct (Line Pipe)

This is a bat aroundCop canal. It is in charge of will extracting the oil that come out and natural gas pass the ground or marine conduitSunday run is carriedIn refinery or user hand.

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3, oil uses a pipe (especially OCTG) crucial technology asks

As a result of the working requirement of its extreme, OCTG reached the peak that steel tube makes to the requirement of function:

1. Extra high strength and tall tenacity: Must can bear the massive pulling force of subterranean number kilometre and complex stress, prevent at the same time fragile break.

2. Fight tall outside pressure with high internal pressure: Especially bushing, want counteractive layer extruding and in-house fluid pressure.

3. Strict thread machining precision: Threaded coupling manages the link that is whole weakness tubal column, must assure air-tightness and join intensity.

4. Outstanding corrosion resistance can:

• Fight vulcanization hydrogen (H? S) stress corrodes craze: Use at " acidity environment " tubal material must have extremely low hardness control and pure metallurgy quality.

• Fight carbon dioxide to corrode: Need uses the alloy steel that contains chromium.

• Fight chloric ion to corrode: Spend in deep-sea or tall mineralization attach most importance to especially in layer should.

High temperature resistant high pressure: In deep well and extradeep well, temperature can amount to 200 ℃ above, pressure exceeds 100MPa.

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4, main material pledges with steel class

• Standard: The whole world uses American oil generally to learnAPIStandard, but also have a lot of high-powered blame API levels (like V&M, of the company such as Tenaris exclusive standard) .

• Class of common API steel:

• H-40, j-55, k-55: Inferior intensity, use at shallow well.

• N-80: Class of commonly used steel.

• L-80, c-90, t-95: High strenth and fight vulcanization hydrogen to corrode.

• P-110, q-125: Extra high strength, use at deep well, extradeep well.

• Drill pipe: E-75, x-95, g-105, s-135 (the number takes strength on behalf of Xiaoqu, unit 1000 pounds / square inch) .

• Bushing and vitta:

• High-powered data:

• 13Cr martensite stainless steel: Fight CO? Corrode.

• Double photograph stainless steel / super double photograph stainless steel: Fight CO at the same time? , Cl? With H? S is corroded.

• Nickel radical alloy (be like G-3, c-276, 825): The corrosion environment that engraves with Yu Ke (high temperature, tall Cl? , tall H? S) .

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5, manufacture technology

• Without seam a canal: This is OCTG (drill pipe, bushing, vitta)The mainstream manufactures technology, because of its whole does not have welding line, sex of on the safe side is taller. Basically passHot-rollingMeans production.

• Solder take-overs: PartDuctCan use solder to take-over with bushing with shallow well (like ERW, LSAW) .