Annular micro-displacement positioning injection control device

Abstract

The invention discloses an annulus micro-displacement positioning injection control device which comprises an outer working sleeve, the outer working sleeve is of a hollow tubular structure, one end of the outer working sleeve is connected with a connector, an annular mandrel check block is embedded in an end opening of the other end of the outer working sleeve, a quick connector is arranged in the mandrel check block, and one end of the quick connector is connected with one end of a driving mandrel in a sleeved mode. The other end of the quick connector is arranged outside the outer working sleeve, the other end of the driving mandrel is connected with one end of the sealing mandrel, the other end of the sealing mandrel is connected with the spray head, the driving mandrel and the sealing mandrel are hollow, the driving mandrel is arranged in the outer working sleeve, and the outer working sleeve is fixedly connected with a driving mechanism. When well washing and paraffin control are carried out, compared with traditional modes such as electric heating well washing and large-displacement hot well washing, cleaning energy consumption can be greatly reduced, and cleaning time is shortened. When a paraffin remover and a foam scrubbing agent are used for cleaning, the problems of delayed onset time and low efficiency of the paraffin remover and the foam scrubbing agent are solved, the effect of the working agent is enhanced, and the cleaning efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas field production pipe column cleaning devices and relates to an annulus micro-displacement positioning injection control device. Background Art

[0002] During the development of oil and gas fields, wax deposition in the production tubing and water out of the production layer often occur. It is necessary to inject hot water, wax remover, foaming agent and other working fluids to clean the inside of the production tubing, so that the liquid in the well can be discharged from the wellbore, and the normal production of oil and gas wells can be restored to achieve the purpose of stabilizing production. At present, the injection pipeline is widely used to directly connect the wellhead valve or pressure gauge joint to inject the working fluid into the oil well for cleaning. Although conventional methods can also achieve the purpose of cleaning, there are problems such as slow onset after injection, difficult to control the onset time, and large injection volume, which is not conducive to improving operating efficiency. It is necessary to develop new cleaning methods to achieve the purpose of improving cleaning efficiency and reducing cleaning energy consumption. Summary of the invention

[0003] The purpose of the present invention is to provide an annular space micro-displacement positioning injection control device, which solves the problems of large injection volume and difficult control of effective time in the prior art.

[0004] The technical solution adopted by the present invention is an annular micro-displacement positioning injection control device, including an outer working sleeve, the outer working sleeve structure is a hollow tubular, one end of the outer working sleeve is connected to the connecting head, and an annular core shaft stopper is embedded in the port of the other end of the outer working sleeve. A quick connector is provided in the core shaft stopper, one end of the quick connector is sleeved with one end of the driving core shaft, and the other end of the quick connector is outside the outer working sleeve, the other end of the driving core shaft is connected to one end of the sealing core shaft, and the other end of the sealing core shaft is connected to the nozzle, the driving core shaft and the sealing core shaft are hollow inside, the driving core shaft is inside the outer working sleeve, and a driving mechanism is fixed to the outer working sleeve.

[0005] The present invention is also characterized in that one end of the sealing core shaft passes through the connector and is clamped with the nozzle, the other end of the sealing core shaft is inside the outer working sleeve, a check valve is sleeved between the sealing core shaft and the driving core shaft, and a driving rack fixing ring is sleeved on the driving core shaft.

[0006] The present invention is also characterized in that: the connector is a hollow tubular structure, one end of the connector is sleeved inside the outer working sleeve and fixed to the outer working sleeve by a locking ring, a sealing ring and a sealing device are provided between the connector and the outer working sleeve, and the sealing device is between the sealing core shaft and the outer working sleeve.

[0007] The present invention is also characterized in that: a pressure relief valve is embedded in a circular hole on the connector, and one end of the pressure relief valve passes through a tubular shell of the connector and is communicated with the interior of the connector.

[0008] The invention is also characterized in that: the outer working sleeve is provided with a circular hole in which a stabilizing device is embedded, and the stabilizing device is embedded in one end of the outer working sleeve and fits with the driving core shaft.

[0009] The present invention is also characterized in that the driving mechanism includes a shell, a driving axle is arranged in the shell, both ends of the driving axle pass through the shell, a driving gear is sleeved on the driving axle, the driving gear is meshed with the driving rack, and the driving rack is fixed to the driving core shaft through a driving rack fixing ring.

[0010] The present invention is also characterized in that a locking ratchet is nested on the driving wheel shaft, the outer side of the locking ratchet is abutted against one end of the locking pin, the other end of the locking pin is engaged with the locking handwheel, the locking pin and one end of the locking handwheel are inside the shell and are arranged perpendicular to the driving wheel shaft, and the other end of the locking handwheel is outside the shell.

[0011] The beneficial effect of the present invention is that, when performing well washing and wax prevention, compared with traditional methods such as electric heating well washing and large-displacement hot well washing, the cleaning energy consumption and cleaning time can be greatly reduced. When using wax removal agents and foam removal agents for cleaning, the problems of delayed onset and low efficiency of wax removal agents and foam removal agents are solved, the effect of the working agent is enhanced, and the cleaning efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an annular space micro-displacement positioning injection control device;

[0013] Figure 2 It is a schematic diagram of the driving mechanism of the annular space micro-displacement positioning injection control device;

[0014] Figure 3 yes Figure 1 Cross-sectional view along plane BB.

[0015] In the figure, 1, nozzle; 2, sealing core shaft; 3, connector; 4, pressure relief valve; 5, sealing ring; 6, locking ring; 7, sealing device; 8, outer working sleeve; 9, check valve; 10, driving core shaft; 11, core shaft stopper; 12, quick connector; 13, driving mechanism; 14, driving rack; 15, driving gear; 16, straightening device; 17, driving rack fixing ring; 18, housing; 19, driving wheel shaft; 20, locking ratchet; 21, locking pin; 22, locking handwheel. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1As shown, the annular micro-displacement positioning injection control device is connected to the oil wellhead through the connector 3 and the flank flange of the oil wellhead, and the injection pipeline is connected to the device through the quick connector 12, forming a closed and pressure-relief system to achieve the positioning injection function. The connector 3 is connected to the outer working sleeve 8 through the locking ring 6, the driving mechanism 13 is fixed to the outer working sleeve 8 by bolts, the check valve 9 is connected to the sealing mandrel 2 by threads, the driving mandrel 10 is connected to the check valve 9 by threads, and a pressure relief valve 4 is provided on the connector 3, which is short-circuited with the connector 3 through threads. The sealing mandrel 2 and the connector 3 are sealed by the cooperation of the sealing ring 5 and the sealing device 7. An operating hole is provided at the position of the outer working sleeve 8 near the connector 3 for adjusting the sealing device 7. The mandrel stopper 11 is used to limit the limit position of the driving mandrel 10. The nozzle 1 is divided into a jet nozzle and a drip nozzle according to the injection type, and the sealing mandrel 2 is a liquid passage.

[0018] like Figure 2 As shown, the driving gear 15 in the driving mechanism 13 is engaged with the driving rack 14, and the driving mandrel 10 is connected and fixed to the driving rack 14 through the driving rack fixing ring 17. The straightening device 16 installed on the outer working sleeve 8 is used to straighten the driving mandrel 10 and keep it in close contact with the driving mandrel 10 body.

[0019] like Figure 3 As shown, the driving mechanism 13 includes a housing 18, a driving axle 19, a locking ratchet 20, a locking pin 21, and a locking handwheel 22. The driving axle 19 is installed through the housing 18, the driving gear 15 is sleeved and fixed on the driving axle 19, the locking ratchet 20 is installed at one end of the driving axle 19 and is engaged with the driving axle 19, and the locking function of the driving axle 19 is achieved by rotating and adjusting the position of the locking pin 21 through the locking handwheel 22. A hexagonal hole for rotation is provided at the outer end of the driving axle 19. Use a special handle to insert the inner hexagonal hole set on the driving axle 19, rotate the driving axle 19, and the driving axle 19 drives the driving mandrel 10 through the driving gear 15, so that the sealing mandrel 2 and the nozzle 1 connected to the driving mandrel 10 are moved to the working position to achieve the purpose of positioning injection.

[0020] The working process of the annular micro-displacement positioning injection control device is as follows:

[0021] Step 1: The annular micro-displacement positioning injection control device is connected to the outermost flange or clamp thread of the large four-way flank at the wellhead of the operating well. During the connection process, the large four-way flank valve is in a closed state. After tightening the connector 3 and the flange or clamp thread, install the pressure relief valve 4 and close it;

[0022] Step 2: The end of the driving mandrel 10 of the annular micro-displacement positioning injection control device is connected to the quick connector 12 and connected to the injection device pipeline;

[0023] Step 3: After connecting the annulus micro-displacement positioning injection control device, open the wellhead large four-way wing valve to check the sealing condition. If the sealing is normal, proceed to the next step. If there is a leak, close the wellhead large four-way wing valve first, and then adjust the sealing device 7 through the operating hole set on the outer working sleeve 8. After adjusting the sealing, reopen the wellhead large four-way wing valve, and select step 4 or step 5 according to different situations. When performing step 4, the nozzle 1 uses a jet nozzle, and when performing step 5, the nozzle 1 uses a drip nozzle;

[0024] Step 4, when performing a small-displacement hot water well washing and wax prevention, use a special handle to insert the inner hexagonal hole at the outer end of the driving wheel shaft 19 according to the set displacement, rotate the driving wheel shaft 19 to drive the driving gear 15, the driving gear 15 drives the driving rack 14 engaged therewith, and the driving rack 14 drives the driving core shaft 10 to adjust the sealing core shaft 2 and the nozzle 1 to the appropriate injection position according to the set displacement. After adjustment, turn the locking hand wheel 22 to push the locking pin 21 into the locking wheel tooth groove set on the driving wheel shaft 19, lock the driving wheel shaft 19 and fix the position of the sealing core shaft 2. In addition, the straightening device 16 set on the outer working sleeve 8 and the driving gear 15 acting on the driving rack 14 work together to straighten the driving core shaft 10 in the working position, and a small flow of hot water is injected from the outside through the inner hole of the core shaft and directly sprayed to the outside of the production oil pipe by the front nozzle 1, mainly at the upper part of the oil pipe string. The reverse temperature field is established with a small displacement to achieve the purpose of wax removal and wax prevention at the upper part of the oil pipe string. This method greatly reduces the energy consumption of wax removal and wax prevention;

[0025] Step five, when injecting wax removal and anti-wax agent and foam removal agent, the sealing core shaft 2 connected to the nozzle 1 is driven by the driving mechanism 13 through the driving rack 14 fixed to the driving core shaft 10, and is positioned in the annulus of the oil casing. A special handle is inserted into the inner hexagonal hole at the outer end of the driving wheel shaft 19, and the driving wheel shaft 19 is rotated to drive the driving core shaft 10 to adjust the sealing core shaft 2 connected to the nozzle 1 to the annulus position. After adjustment, the locking hand wheel 22 is turned to push the locking pin 21 into the locking wheel tooth groove set on the driving shaft, and the driving wheel shaft 19 is locked to fix the position of the sealing core shaft 2. After the nozzle 1 is positioned, the working agent injection device is started to start injection, so as to achieve the purpose of directly dripping the injected working agent into the annulus. This method solves the problems of delayed onset time and low efficiency of wax removal agents and foam removal agents, which not only enhances the effect of the working agent, but also improves the cleaning efficiency and reduces the cleaning energy consumption;

[0026] Step six, after the injection work is completed, first turn the locking handwheel 22 to disengage the locking pin 21 from the tooth groove of the locking ratchet 20 set on the driving wheel shaft 19, release the lock and use a special handle to insert it into the hexagonal hole at the outer end of the driving wheel shaft 19, turn the driving wheel shaft 19 to drive the driving core shaft 10 to withdraw the sealing core shaft 2 connected to the nozzle 1, and when the nozzle 1 is withdrawn to the outside of the outermost valve gate of the large four-way flank of the wellhead, close the large four-way flank valve of the wellhead, release the pressure through the pressure relief valve 4 and then remove the controller.

[0027] Example 1

[0028] like Figure 1 As shown, the annular micro-displacement positioning injection control device proposed in this embodiment includes an outer working sleeve 8, which has a hollow tubular structure. One end of the outer working sleeve 8 is connected to the connector 3, and an annular core shaft stopper 11 is embedded in the port of the other end of the outer working sleeve 8. A quick connector 12 is provided in the core shaft stopper 11, and one end of the quick connector 12 is sleeved with one end 10 of the driving core shaft, and the other end of the quick connector 12 is outside the outer working sleeve 8. The other end of the driving core shaft 10 is connected to one end of the sealing core shaft 2, and the other end of the sealing core shaft 2 is connected to the nozzle 1. The driving core shaft 10 and the sealing core shaft 2 are hollow inside, the driving core shaft 10 is inside the outer working sleeve 8, and a driving mechanism 13 is fixed to the outer working sleeve 8.

[0029] Example 2

[0030] like Figure 1 As shown, the annular micro-displacement positioning injection control device proposed in this embodiment includes an outer working sleeve 8, which has a hollow tubular structure. One end of the outer working sleeve 8 is connected to the connector 3, and an annular core shaft stopper 11 is embedded in the port of the other end of the outer working sleeve 8. A quick connector 12 is provided in the core shaft stopper 11, and one end of the quick connector 12 is sleeved with one end 10 of the driving core shaft, and the other end of the quick connector 12 is outside the outer working sleeve 8. The other end of the driving core shaft 10 is connected to one end of the sealing core shaft 2, and the other end of the sealing core shaft 2 is connected to the nozzle 1. The driving core shaft 10 and the sealing core shaft 2 are hollow inside, the driving core shaft 10 is inside the outer working sleeve 8, and a driving mechanism 13 is fixed to the outer working sleeve 8.

[0031] One end of the sealing core shaft 2 passes through the connector 3 and is clamped with the nozzle 1, and the other end of the sealing core shaft 2 is inside the outer working sleeve 8. A check valve 9 is sleeved between the sealing core shaft 2 and the driving core shaft 10, and a driving rack fixing ring 17 is sleeved on the driving core shaft 10.

[0032] The connector 3 is a hollow tubular structure, one end of which is sleeved inside the outer working sleeve 8 and fixed to the outer working sleeve 8 by a locking ring 6. There is a sealing ring 5 and a sealing device 7 between the connector 3 and the outer working sleeve 8, and the sealing device 7 is between the sealing core shaft 2 and the outer working sleeve 8.

[0033] The connector has a circular hole in which a pressure relief valve 4 is embedded. One end of the pressure relief valve 4 passes through the tubular shell of the connector 3 and is communicated with the interior of the connector 3 .

[0034] Example 3

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, the annular micro-displacement positioning injection control device proposed in this embodiment includes an outer working sleeve 8, which has a hollow tubular structure. One end of the outer working sleeve 8 is connected to the connector 3, and an annular core shaft stopper 11 is embedded in the port of the other end of the outer working sleeve 8. A quick connector 12 is provided in the core shaft stopper 11, and one end of the quick connector 12 is sleeved with one end 10 of the driving core shaft, and the other end of the quick connector 12 is outside the outer working sleeve 8. The other end of the driving core shaft 10 is connected to one end of the sealing core shaft 2, and the other end of the sealing core shaft 2 is connected to the nozzle 1. The driving core shaft 10 and the sealing core shaft 2 are hollow inside, the driving core shaft 10 is inside the outer working sleeve 8, and a driving mechanism 13 is fixed to the outer working sleeve 8.

[0036] One end of the sealing core shaft 2 passes through the connector 3 and is clamped with the nozzle 1, and the other end of the sealing core shaft 2 is inside the outer working sleeve 8. A check valve 9 is sleeved between the sealing core shaft 2 and the driving core shaft 10, and a driving rack fixing ring 17 is sleeved on the driving core shaft 10.

[0037] The connector 3 is a hollow tubular structure, one end of which is sleeved inside the outer working sleeve 8 and fixed to the outer working sleeve 8 by a locking ring 6. There is a sealing ring 5 and a sealing device 7 between the connector 3 and the outer working sleeve 8, and the sealing device 7 is between the sealing core shaft 2 and the outer working sleeve 8.

[0038] The connector has a circular hole in which a pressure relief valve 4 is embedded. One end of the pressure relief valve 4 passes through the tubular shell of the connector 3 and is communicated with the interior of the connector 3 .

[0039] The outer working sleeve 8 has a circular hole in which a stabilizing device 16 is embedded. The stabilizing device 16 is embedded in one end of the outer working sleeve 8 and fits with the driving core shaft 10 .

[0040] The driving mechanism 13 includes a housing 18 , in which a driving axle 19 is disposed. Both ends of the driving axle 19 pass through the housing 18 . A driving gear 15 is sleeved on the driving axle 19 . The driving gear 15 is meshed with a driving rack 14 . The driving rack 14 is fixedly connected to the driving spindle 10 via a driving rack fixing ring 17 .

[0041] A locking ratchet 20 is nested on the driving wheel shaft 19, and the outer side of the locking ratchet 20 abuts against one end of a locking pin 21, and the other end of the locking pin 21 is engaged with a locking handwheel 22. One end of the locking pin 21 and the locking handwheel 22 are inside the housing 18 and are vertically arranged with the driving wheel shaft 19, and the other end of the locking handwheel 22 is outside the housing 18.

Claims

1. Annular space micro-displacement positioning injection control device, characterized by: The invention comprises an outer working sleeve (8), wherein the outer working sleeve (8) is in a hollow tubular structure, one end of the outer working sleeve (8) is connected to a connector (3), an annular core shaft stopper (11) is embedded in the port of the other end of the outer working sleeve (8), a quick connector (12) is arranged in the core shaft stopper (11), one end of the quick connector (12) is sleeved with one end of a driving core shaft (10), the other end of the quick connector (12) is outside the outer working sleeve (8), the other end of the driving core shaft (10) is connected to one end of a sealing core shaft (2), the other end of the sealing core shaft (2) is connected to a nozzle (1), the driving core shaft (10) and the sealing core shaft (2) are hollow inside, the driving core shaft (10) is inside the outer working sleeve (8), and a driving mechanism (13) is fixedly connected to the outer working sleeve (8).

2. The annular space micro-displacement positioning injection control device according to claim 1 is characterized in that: One end of the sealing core shaft (2) passes through the connector (3) and is clamped with the nozzle (1), and the other end of the sealing core shaft (2) is inside the outer working sleeve (8). A check valve (9) is sleeved between the sealing core shaft (2) and the driving core shaft (10), and a driving rack fixing ring (17) is sleeved on the driving core shaft (10).

3. The annular space micro-displacement positioning injection control device according to claim 2 is characterized in that: The connector (3) is a hollow tubular structure. One end of the connector (3) is sleeved inside an outer working sleeve (8) and is fixed to the outer working sleeve (8) via a locking ring (6). A sealing ring (5) and a sealing device (7) are provided between the connector (3) and the outer working sleeve (8). The sealing device (7) is between the sealing core shaft (2) and the outer working sleeve (8).

4. The annular space micro-displacement positioning injection control device according to claim 3 is characterized in that: The connector (3) has a circular hole in which a pressure relief valve (4) is embedded. One end of the pressure relief valve (4) passes through the tubular outer shell of the connector (3) and is in communication with the interior of the connector (3).

5. The annular space micro-displacement positioning injection control device according to claim 4 is characterized in that: The outer working sleeve (8) has a circular hole in which a stabilizing device (16) is embedded. The stabilizing device (16) is embedded in one end of the outer working sleeve (8) and fits with the driving core shaft (10).

6. The annular space micro-displacement positioning injection control device according to claim 5 is characterized in that: The driving mechanism (13) comprises a housing (18), a driving axle (19) is arranged in the housing (18), both ends of the driving axle (19) pass through the housing (18), a driving gear (15) is sleeved on the driving axle (19), the driving gear (15) is meshed with a driving rack (14), and the driving rack (14) is fixedly connected to the driving spindle (10) via a driving rack fixing ring (17).

7. The annular space micro-displacement positioning injection control device according to claim 6 is characterized in that: A locking ratchet (20) is nested on the driving wheel shaft (19); the outer side of the locking ratchet (20) abuts against one end of a locking pin (21); the other end of the locking pin (21) is engaged with a locking hand wheel (22); one end of the locking pin (21) and the locking hand wheel (22) are inside the housing (18) and are arranged vertically with the driving wheel shaft (19); the other end of the locking hand wheel (22) is outside the housing (18).

Images