CN201496022U

CN201496022U - High-pressure converter for machine pumping wellhead

Info

Publication number: CN201496022U
Application number: CN2009200044377U
Authority: CN
Inventors: 赵普春; 曾涛; 郑东海; 蒲发军; 朱春林; 陈华强
Original assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co; Sinopec Baling Co
Priority date: 2009-08-25
Filing date: 2009-08-25
Publication date: 2010-06-02
Anticipated expiration: 2019-08-25

Abstract

The utility model relates to a high-pressure converter for a machine pumping wellhead, in particular to a high-pressure converter for high-pressure unblocking of pipe columns, which consists of a conversion connector and a suspension clamp. According to the oil pipe hanger type, one end of the conversion connector is connected with an oil pipe hanger, the other end of the conversion connector is connected with a high-pressure pipeline of a pump truck, the inner wall of the conversion connector is provided with a seat hanging step, the seat hanging step is used for supporting the suspension clamp, and the suspension clamp is used for supporting an oil pumping rod. The utility model can temporarily change the sealing mode of the wellhead of the oil well, greatly improve the bearing level, and provide the condition for the high-pressure unblocking of the machine pumping pipe columns.

Description

Machine is taken out the well head high tension transformer

Technical field

The utility model relates to a kind of rod-pumped well well mouth sealing device, particularly a kind of high tension transformer that is used for the de-plugging of tubing string high pressure.

Background technology

Pumpingh well well head employing polished rod sealer (or the manual preventer of double disc) and machine are taken out production tree and are cooperated the sealing of formation well head.As shown in Figure 1, the general rod-pumped well polished rod sealer 11 pressure-bearing limit are 20MPa, and the wellhead flange pressure-bearing limit is 25MPa, and the pressure-bearing limit of oil nozzle cover is 15MPa.When tubing string took place to stop up owing to the local emulsification of crude oil, traditional method for removing blockage was to stop, and then pump truck is received oil nozzle and is overlapped on 12, and pump truck pumps into well killing fluid, makes the tubing string de-plugging.

But this method for removing blockage is not suitable for the mining operations of thicker oil, as system in Tahe Oilfield viscosity of crude height, so wherein with the most use be suction pump.Owing to thin oil mix with viscous crude uneven, mix reasons such as rare shakiness, oil-water emulsion and may generators take out tubing string and stop up, after machine is taken out tubing string and stopped up, need the above pump pressure of 35MPa could release the viscous crude that stops up tubing string rapidly during de-plugging.Limited by wellhead equipment pressure-bearing grade, adopt polished rod sealer sealing well head at the system in Tahe Oilfield heavy oil block, from oil pipe oil nozzle cover connect pump truck horizontal sliding treatment fluid carry out de-plugging duty cycle long, engineering cost is high.Pump detection and workover recovers oil well production and has long, problems such as engineering cost is high, Master Cost height of activity duration equally.

The utility model content

The purpose of this utility model is to avoid each pressure-bearing weakness of rod-pumped well well head by a converter, and Iterim Change well head pressure-bearing grade is for the high pressure de-plugging provides execution conditions.Concrete way is after stopping wellhead equipment to be dismantled, and then converter is installed to well head, and the converter bottom is connected with tubing hanger, and upper seat is hung sucker rod.Machine is taken out tubing string, and afterwards employing high pressure de-plugging method recovery oil well production required time is short, engineering cost is low, do not produce Master Cost by the viscous crude obstruction.

Machine is taken out the well head high tension transformer and is made up of conversion joint and suspension clamp.Connect tubing hanger according to tubing hanger type selecting conversion joint one end, the other end connects the pump truck high pressure line, and the conversion inner nosepiece wall has hanging platform rank, and clamp is hung in the rank carrying of seat hanging platform, hangs clamp carrying sucker rod.

Hang clamp and cooperates with the conversion joint and be implemented in the inner suspension of conversion joint sucker rod, the original packing_seal of change rod-pumped well well head is metallic seal, significantly improves the pressure-bearing grade.This converter steel is N80, and the experiment pressure-bearing is greater than 70MPa, and the theoretical pressure-bearing limit is 103.8MP.

Description of drawings

Fig. 1 is a tubing string method for removing blockage schematic diagram in the prior art;

Fig. 2 is converter of the present utility model and sucker rod and tubing hanger annexation schematic diagram;

Fig. 3 is the conversion joint design sectional drawing of the utility model converter;

Fig. 4 is the stereogram of the suspension clamp of the utility model converter;

Fig. 5 is the cross-sectional view of the suspension clamp of the utility model converter;

Fig. 6 is the longitudinal section of the suspension clamp of the utility model converter;

Fig. 7 is the sectional drawing of the conversion joint of the utility model converter along the AA line.

The specific embodiment

As shown in Figure 2, conversion joint 23 is a tubular, and bottom joint 24 connects tubing hanger 13, and top sub 25 connects the pump truck high pressure line.Seat hanging platform rank 21 are conversion inner nosepiece wall reinforcement, and its carrying and backstop hang clamp 30.

As Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, machine is taken out the conversion joint 23 of well head high tension transformer and is made up of the integrally formed seat hanging platform rank 21 of top male joint 25, bottom male joint 24, middle cylindrical shell 26 and inwall.Male joint 25 and the screwed connection of pump truck high pressure line, male joint 24 and tubing hanger screwed connection.Hang clamp 30 and comprise that a U-shaped crosses chute 31, U-shaped bottom 32, promptly arc portion cooperates with the rod collar 16 of different size and carries, and U-shaped end 33 is the highly pressurised liquid passage, possesses conveyance capacity.Seat hanging platform rank 21 cooperate with suspension clamp 30 and support hangs clamp 30.As Fig. 4 and shown in Figure 6, the mid portion of suspension clamp and rod collar contact surface are to lower recess, and its vertical section is shown as a trapezoidal shape, just with the rod collar form fit.

Concrete using method is: tubing hanger 13 above all devices are removed in the stable back of well head; Get rid of polished rod 15 and the 1st sucker rod 17, guarantee that plunger is suggested pump barrel; Propose the 2nd sucker rod 17, conversion joint 23 is through on the 2nd sucker rod 17; On carry sucker rod 17, conversion joint top sub 25 is directly connected on the tubing hanger 13; The following box cupling 16 of the 2nd sucker rod is mentioned the conversion joint more than 23, be stuck in the last box cupling of the 3rd sucker rod 17 below 16 hanging clamp 30; Transfer sucker rod 17, make and hang on 30 present hanging platforms of

clamp rank

21,16 of the last box cuplings of the 3rd sucker rod 17 are removed the 2nd sucker rod after hanging on the U-shaped bottom 32 of clamp 30, laying down load, the U-shaped end 33 that the U-shaped of suspension clamp 30 is crossed chute 31 is the highly pressurised liquid passage; The pump truck high pressure line is received the top sub 25 of conversion joint 23.

As shown in Figure 7, cylindrical shell 26 outer walls middle part is a square, so that go up shackle.

Claims

1. a machine is taken out the well head high tension transformer, it is characterized in that, be made up of conversion joint (23) and suspension clamp (30), conversion joint (23) has two joints (24,25) up and down, the centre is cylindrical shell (26), bottom joint (24) connects tubing hanger (13), and top sub (25) connects the pump truck high pressure line, and the conversion inner nosepiece wall has hanging platform rank (21), clamp (30) is hung in seat hanging platform rank (21) carrying, hangs clamp (30) carrying sucker rod (17).

2. machine as claimed in claim 1 is taken out the well head high tension transformer, it is characterized in that, wherein conversion joint (23) two ends are pin thread.

3. machine as claimed in claim 1 is taken out the well head high tension transformer, it is characterized in that, wherein seat hanging platform rank (21) are conversion joint (23) oncus part.

4. machine as claimed in claim 1 is taken out the well head high tension transformer, it is characterized in that, wherein hangs clamp (30) and comprises that a U-shaped crosses chute (31).

5. machine as claimed in claim 1 is taken out the well head high tension transformer, it is characterized in that, wherein hangs clamp (30) and rod collar contact surface to lower recess, and its vertical section is shown as a trapezoidal shape.

6. machine as claimed in claim 1 is taken out the well head high tension transformer, it is characterized in that, wherein conversion joint outer wall middle part is a square.