CN100507078C - Method for producing 10 m long ceramic liner composite oil pipe and special centrifugal machine - Google Patents

Abstract

The process of producing 10 m long composite oil pipe with ceramic lining includes the following steps: stoving material including aluminum powder, iron oxide powder and silica powder at 180 deg.c for 1.5-2 hr, mixing and feeding into oil pipe; starting the centrifuging machine while locking the oil pipe with locking ring and igniting to react; rotating for further 10 sec after reaction, opening the locking ring automatically, starting the stretcher of the centrifuging machine until the movable drawing head reaches the head of the oil pipe; locking the clamping board on the movable drawing head and the fixed drawing head, withdrawing the movable drawing head while maintaining the pressure in 15 ton, releasing the stretcher after 5-8 sec, and withdrawing the clamping board; taking out the composite oil pipe and cooling in the air. The composite oil pipe has high anticorrosive performance, high antiwear performance and other advantages.

Description

The manufacture method of 10 m long ceramic liner composite oil pipes and special centrifugal machine

Technical field:

The invention belongs to from spreading the ceramic-lined steel pipe technical field the special-purpose overlength of the locking synchronously stretching self-centering whizzer that especially relates to a kind of method of production 10 m long ceramic liner composite oil pipes and realize this method.

Background technology:

Self propagating high temperature synthetic technology (SHS) originates from USSR (Union of Soviet Socialist Republics), is further developed in Japan afterwards, passes to China the eighties in last century.Be divided into centrifuging and gravity method in the practical application, centrifuging is used more general.Its ultimate principle is that the high temperature that utilizes thermit reaction to produce makes thermite reaction continue to carry out.Iron powder and aluminium powder are placed in the steel pipe, and allow the steel pipe high speed rotating.After thermite reaction took place, under action of centrifugal force, the iron that reaction produces separated owing to proportion is different with aluminum oxide, and the former and steel pipe walls form metallurgical binding, are attached to tube inner wall; The latter is close to the iron layer, is mechanical bond, forms ceramic-lined composite steel tube.

U.S.'s API standard is the standard that whole world petroleum industry is followed jointly, and its oil pipe is for being threaded, and tubing length is more than 9 meters, linearity≤1/1000.Yet owing to be subjected to the restriction of centrifugation apparatus, the ceramic-lined steel pipe length of producing both at home and abroad is no more than 6 meters at present, this in the welded pipe line that powder is carried, use fully can, but use in greater than 6 meters oil pipe not all right at all in length.

Summary of the invention:

Technical problem to be solved by this invention aims to provide a kind of manufacture method of 10 meters long anticorrosion, attrition resistant ceramic liner composite oil pipes, provide a kind of special-purpose overlength of locking synchronously stretching self-centering whizzer of realizing this method simultaneously, to overcome the defective that background technology exists.

Manufacture method of the present invention comprises the steps:

(1) oil pipe that cleans up is put into the type pipe of whizzer;

(2) adopt aluminium powder, brown iron oxide and silica flour to do raw material, aluminium powder and brown iron oxide are pressed the chemical reaction ratio, and silica flour is 5% of a raw material total amount, and the granularity of aluminium powder, brown iron oxide and silica flour is at 75～100 μ m; The reaction raw materials total amount is by 0.8～1.1g/cm ², its denominator is the tube inner wall surface-area; Under 180 ℃, dried respectively 1.5～2 hours calculating good raw material, after mixer mixes 0.5 hour, raw material is added in the oil pipe then;

(3) open whizzer, improve rotating speed to 2100～2200r/min gradually, the synchronous securing ring of the self-centering of whizzer automatically locks oil pipe, keeps the rotating speed of whizzer, and igniting makes raw material reaction;

(4) reaction finishes, and is rotated further for 10 seconds, stops operating, and the synchronous securing ring of self-centering is opened automatically;

(5) stretched portion of startup whizzer, when treating that pull head advances to the oil pipe head, moving pull head of locking simultaneously and the clamp of deciding pull head, back deactuate pull head keeps 15 tons of pulling force, discharges stretched portion after 5～8 seconds, the extraction clamp;

(6) in whizzer, take out oil pipe, in air, cool off.

The special centrifugal machine that the present invention adopts comprises centrifugal part, self-centering lock portion and stretched portion, and centrifugal part comprises the bearing support of type pipe, mount type pipe and the base of fixed bearing block; The self-centering lock portion is a synchronous securing ring of self-centering that evenly is installed on the type pipe excircle; Stretched portion comprises the back up pad of support bar, stationary liquid cylinder pressure and the support bar of Hydraulic Station, hydro-cylinder, supporting seat, connection Hydraulic Station and supporting seat, supporting seat is provided with one and decides pull head, hydro-cylinder is provided with a moving pull head, moving pull head and decide pull head and all have the clamp hole, clamp is provided with clamp in the hole.

The synchronous securing ring of self-centering comprises locking rotating ring and pin, and the inside circumference face of locking rotating ring has dovetail groove, and the groove bottom of dovetail groove is an inclined-plane, and the pin top is attached on the bottom land inclined-plane of dovetail groove.

The present invention utilizes special centrifugal machine, ceramic layer is made 10 meters long oil pipes as lining, so product has anticorrosion, the wear-resisting general characteristic of ceramic-lined steel pipe, make double above the work-ing life of oil pipe, thereby reduced the operation number of times of oil well, increased output; Reduce the consumption of oil pipe, reduced production cost.By the synchronous securing ring of self-centering, assurance oil pipe axle center overlaps with the whizzer rotation center, guarantees transient equilibrium; By stretched portion, guarantee when oil pipe red heat state slight curves, thereby guaranteed the linearity of oil pipe with suitable pulling force alignment oil pipe.

Description of drawings:

Fig. 1 is the structural representation of the special centrifugal machine that relates to of the inventive method;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the enlarged view of partial view A among Fig. 1;

Fig. 4 is the enlarged view of partial view B among Fig. 2;

Fig. 5 is the structural representation of self-centering lock portion.

Embodiment:

With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, the inventive method special centrifugal machine comprises centrifugal part, self-centering lock portion and stretched portion, centrifugal part comprises the bearing support 9 of type pipe 7, mount type pipe and the base 10 of fixed bearing block, and the self-centering lock portion is a synchronous securing ring 8 of self-centering that evenly is set on type pipe 7 excircles; Stretched portion comprises Hydraulic Station 1, hydro-cylinder 3, supporting seat 11, connects the back up pad 2 of support bar 15, stationary liquid cylinder pressure and the support bar of Hydraulic Station and supporting seat, supporting seat 11 is provided with one and decides pull head 12, hydro-cylinder is provided with a moving pull head 4, decide pull head 12 and be provided with clamp hole 13 and clamp 14, moving pull head 4 is provided with clamp hole 5 and clamp 6.

With reference to Fig. 5, the synchronous securing ring of self-centering comprises locking rotating ring 16 and pin 18, and the inside circumference face of locking rotating ring 16 has dovetail groove 17, and the groove bottom of dovetail groove 17 is inclined-planes, and pin 18 tops are attached on the bottom land inclined-plane of dovetail groove 17.

Embodiment 1

9.62 meters of tubing lengths, specification Φ 73 * 5.5mm presses 0.8g/cm ²Add aluminium powder 3746g, brown iron oxide 11237g, add silica flour 789g; Medicinal powder oven dry 1.5 hours; The rotating speed 2100rpm of oil pipe; Reaction finishes, and is rotated further for 10 seconds, stops operating, and starts the stretched portion of whizzer, keeps 15 tons of pulling force, discharges stretched portion after 5 seconds; Take out oil pipe, in air, cool off.

Embodiment 2

9.65 meters of tubing lengths, specification Φ 73 * 5.5mm, 1g/cm ²Add aluminium powder 4682g, brown iron oxide 14046g, add silica flour 986kg; Medicinal powder oven dry 1.8 hours; The rotating speed 2150rpm of oil pipe; Reaction finishes, and is rotated further for 8 seconds, stops operating, and starts the stretched portion of whizzer, keeps 18 tons of pulling force, discharges stretched portion after 8 seconds; Take out oil pipe, in air, cool off.

Embodiment 3

9.58 meters of tubing lengths, specification Φ 73 * 5.5mm, 1.1g/cm ²Add aluminium powder 5150g, brown iron oxide 15451g, add silica flour 1084g; Medicinal powder oven dry 2 hours; The rotating speed 2200rpm of oil pipe; Reaction finishes, and is rotated further for 10 seconds, stops operating, and starts the stretched portion of whizzer, keeps 15 tons of pulling force, discharges stretched portion after 6 seconds; Take out oil pipe, in air, cool off.

Claims (2)

1, special centrifugal machine in a kind of manufacture method of 10 m long ceramic liner composite oil pipes, its centrifugal part comprises type pipe (7), the base (10) of bearing support of mount type pipe (9) and fixed bearing block, it is characterized in that: also comprise self-centering lock portion and stretched portion, the self-centering lock portion is a synchronous securing ring of self-centering (8) that evenly is set on the type pipe excircle, the synchronous securing ring of self-centering (8) comprises locking rotating ring (16) and pin (18), the inside circumference face of locking rotating ring (16) has dovetail groove (17), the groove bottom of dovetail groove (17) is an inclined-plane, and pin (18) top is attached on the bottom land inclined-plane of dovetail groove (17); Stretched portion comprises Hydraulic Station (1), hydro-cylinder (3), supporting seat (11), connects the back up pad (2) of support bar (15), stationary liquid cylinder pressure and the support bar of Hydraulic Station and supporting seat, supporting seat (11) is provided with one and decides pull head (12), hydro-cylinder is provided with a moving pull head (4), moving pull head (4) and decide pull head (12) two ends and all have clamp mouth (5), (13) respectively respectively is provided with clamp (6), (14) in the clamp mouth.

2, utilize the described special centrifugal machine of claim 1 to make the manufacture method of 10 m long ceramic liner composite oil pipes, comprise the steps:

(1) oil pipe that cleans up is put into the type pipe of whizzer;

(2) adopt aluminium powder, brown iron oxide and silica flour to do raw material, aluminium powder and brown iron oxide are pressed the chemical reaction ratio, and silica flour is 5% of raw material total amount by weight percentage, and the granularity of aluminium powder, brown iron oxide and silica flour is at 75～100 μ m; The reaction raw materials total amount is by 0.8～1.1g/cm ², its denominator is the tube inner wall surface-area; Under 180 ℃, dried respectively 1.5～2 hours calculating good raw material, after mixer mixes 0.5 hour, raw material is added in the oil pipe then;

(3) open whizzer, improve rotating speed to 2100～2200r/min gradually, the synchronous securing ring of the self-centering of whizzer automatically locks oil pipe, keeps the rotating speed of whizzer, and igniting makes raw material reaction;

(4) reaction finishes, and is rotated further for 10 seconds, stops operating, and the synchronous securing ring of self-centering is opened automatically;

(5) stretched portion of startup whizzer, when treating that pull head advances to the oil pipe head, moving pull head of locking simultaneously and the clamp of deciding pull head, back deactuate pull head keeps 15 tons of pulling force, discharges stretched portion after 5～8 seconds, the extraction clamp;

(6) in whizzer, take out oil pipe, in air, cool off.

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