CN110685616A - Well repairing operation method for low-permeability water-sensitive oil well - Google Patents
Well repairing operation method for low-permeability water-sensitive oil well Download PDFInfo
- Publication number
- CN110685616A CN110685616A CN201910998658.9A CN201910998658A CN110685616A CN 110685616 A CN110685616 A CN 110685616A CN 201910998658 A CN201910998658 A CN 201910998658A CN 110685616 A CN110685616 A CN 110685616A
- Authority
- CN
- China
- Prior art keywords
- sucker rod
- hanger
- rod
- lifting
- elevator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/02—Rod or cable suspensions
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/02—Rod or cable suspensions
- E21B19/06—Elevators, i.e. rod- or tube-gripping devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for anchoring the tools or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
- E21B43/127—Adaptations of walking-beam pump systems
Abstract
The invention relates to a well repairing operation method of a low-permeability water-sensitive oil well, which comprises the steps of using a lifting hook and an elevator to cooperate, and firstly dismantling the part above an oil extraction tee; lifting the polish rod, clamping the first sucker rod and then removing the polish rod; lifting the hook of the sucker rod, and removing the first sucker rod after the second sucker rod is clamped; and lifting the lifting hook of the sucker rod, clamping the third sucker rod, then removing the second sucker rod, and so on. When a blowout precursor occurs, a sucker rod hanger is screwed above a wellhead sucker rod, a sucker rod short joint is screwed above the sucker rod hanger, so that the sucker rod hanger is seated at the upper port of an oil pipe joint, and then the sucker rod short joint is removed; opening a forward washing pore passage of the sucker rod hanger, then screwing an oil pipe lifting short section on the conical hanger and lifting the oil pipe lifting short section, unsealing a forward washing channel of the anchoring oil drain, and then replacing a certain amount of well killing fluid to control well blowout so as to stabilize a well head. The method can solve the problems that the well cannot be closed in time during blowout and the oil layer is polluted by backwashing kill well.
Description
Technical Field
The invention relates to a workover tool, in particular to a workover method for a low-permeability water-sensitive oil well, and belongs to the technical field of workover tools.
Background
The horsehead of the beam-pumping unit drives the plunger of the underground oil pump to move up and down through the rope braid, the polish rod and the oil pumping rod, so that crude oil in a well is continuously pumped out of a shaft. The polished rod is connected with the sucker rod through a polished rod, the polished rod is positioned at the uppermost part of the sucker rod, and the polished rod is matched with a packing in the blowout prevention box to seal a well mouth. The sucker rod inserts in oil pipe, oil pipe is arranged in the sleeve pipe, the well head cross that is arranged above ground is installed to sheathed tube last port, the upper end of oil pipe column is connected with the oil pipe joint, the oil pipe joint connects the lower port at the toper hanger soon, the sealed upper portion inner wall that supports at the well head cross of toper hanger, the left and right both sides of well head cross are connected with the sleeve pipe gate that is linked together with the sleeve pipe annular space respectively, well head reducing flange is installed to well head cross top, the oil recovery tee bend is installed to well head reducing flange top, one side of oil recovery tee bend is connected with the oil pipe gate, prevent the top of blowout.
The oil well pump is damaged to cause pump out of work, the sucker rod breaks off, the sucker rod and the oil pipe are eccentrically worn to cause oil pipe abrasion or sucker rod abrasion, sand production in the well, scaling to cause pipe column sand blocking, scale blocking and the like, and the oil well is easy to stop production. The oil-water well with the problems and faults needs to be subjected to pump detection operation, so that the oil-water well can be recovered to normal production.
The main work content of the oil well pump inspection is to trip the sucker rod and the oil pipe. In addition, according to the development needs of oil fields, the work system needs to be changed for changing pumps or operations such as deepening or lifting the pump hanging depth, adjusting and repairing layers, plugging water and the like, and the sucker rod and the oil pipe in the well also need to be lifted out. Because the sucker rod has the pumping effect to the interior liquid of oil pipe in playing the sucker rod in-process, the phenomenon of induced spraying in the oil pipe easily takes place, plays the sucker rod simultaneously and causes the interior liquid column pressure of oil pipe to reduce, and the release of the dissolved gas in the oil pipe causes the liquid eruption easily, causes ground pollution, and serious can destroy oil well shaft structure, phagocytose well head equipment, arouse the fire incident, cause the casualties, the polluted environment, extravagant and destroy oil and gas resource, harm is very big.
In the prior art, in the process of starting the sucker rod, if oil injection at a well head or a well injection precursor exists, a polished rod is firstly put down, and then a polished rod blowout prevention box and a well head flow are installed, so that the labor intensity is high, the operation time is long, and the oil pipe internal injection cannot be quickly and effectively controlled in a short time. Even a blowout accident occurs due to time delay, resulting in more serious property personnel loss.
If the blowout is controlled by backwashing kill, the construction pressure of the backwashing well is high, the required well-flushing liquid amount is large, oil layer pollution can be caused to a low-permeability water-sensitive stratum, and the yield of crude oil is influenced. The best well killing method is to supplement a certain amount of well killing fluid into the oil pipe to control well blowout; however, due to the special one-way structure of the underground production pipe column, the underground anchoring oil drain device can be unsealed only by lifting the pipe column by about the height of one oil pipe, a positive circulation channel is opened, a certain amount of well killing fluid is supplemented into the oil pipe, and the well mouth is stabilized. In the existing operation method, after a polished rod and a blowout prevention box are installed, an oil string cannot be lifted, so that an oil drainer channel cannot be opened to realize positive circulation well killing.
Disclosure of Invention
The invention aims to overcome the problems in the prior art, and provides a well repairing operation method for a low-permeability water-sensitive oil well, which can solve the problems that the well cannot be closed timely when the well is shut down halfway and oil overflows during the process of lifting a sucker rod in the underground operation.
A method for repairing the oil well with low water permeability includes such steps as hanging the first sucker rod on its hook, hanging the upper part of polish rod by the first elevator, removing the parts above the three-way sucker rod on the oil well, lifting the polish rod by ⑵ until the three-way sucker rod is exposed, hanging the second elevator under the flange of the first sucker rod, hanging the second elevator on the three-way sucker rod by the hook, removing polish rod by ⑶, lifting the hook until the first elevator is exposed, removing the first elevator from the polish rod, lifting the hook until the three-way sucker rod is exposed, lowering the first elevator by ⑸ until the first elevator is removed, removing the second elevator from the second sucker rod, removing the second elevator from the flange of the second sucker rod, lowering the first elevator to the three-way sucker rod, removing the first elevator from the three-way sucker rod, removing the second elevator from the flange of the second sucker rod, removing the second elevator from the flange of the third sucker rod, removing the second elevator from the third elevator, lifting hook from the three-way sucker rod, removing the first elevator from the sucker rod, removing the third elevator from the sucker rod, removing the sucker rod from the sucker rod, removing the elevator from the sucker rod by 3875, and removing the third elevator from the sucker rod.
Compared with the prior art, the invention has the following beneficial effects: the lifting hook of the sucker rod is used as a lifting tool, the first elevator and the second elevator are alternately clamped below the upsetting flange of the sucker rod, and the upper flange of the oil extraction tee is used for supporting the elevator, so that when the thread of the sucker rod at the top is disassembled, the sucker rod below can be supported on the oil extraction tee, and the underground sucker rod can be conveniently lifted up one by one and disassembled.
⑼ screwing sucker rod hanger on sucker rod of well head, screwing sucker rod short section on sucker rod hanger, hanging sucker rod short section with sucker rod hanger and lifting it for a certain distance, removing elevator one or two on sucker rod of well head, ⑽ making sucker rod hanger move downwards to make sucker rod hanger be seated on upper end of oil pipe connector, said oil pipe connector being positioned on top of down-hole oil pipe column and screwed on lower end of conical hanger, said conical hanger being seated on conical surface of upper portion of internal cavity of well head four-way, screwing sucker rod hanger on top of sucker rod hanger, screwing sucker rod short section on sucker rod hanger to make sucker rod hanger be hung, lifting sucker rod hanger to make sucker rod hanger be in upper end of oil pipe connector, and the central hole of sucker rod hanger be in closed state, the upward channel of oil pipe is cut off to prevent overflow.
As a further improvement of the invention, the method comprises the following steps of detaching a wellhead reducing flange above a wellhead cross joint and the oil extraction tee joint by ⑾, opening a forward washing pore passage of a sucker rod hanger, detaching a short section of the sucker rod, screwing an oil pipe lifting short section on the upper port of the conical hanger, lifting the oil pipe lifting short section for a certain distance by ⒀ after the oil pipe lifting short section is hung by an oil pipe elevator, separating the conical hanger from the wellhead cross joint, enabling a downhole oil pipe column to ascend along with the conical hanger to cut a shear pin of an anchoring oil drainer at the lower part of the downhole oil pipe column, unsealing the forward washing pore passage of the anchoring oil drainer by ⒁ descending the oil pipe elevator, enabling the conical hanger to be re-seated in the wellhead cross joint, then detaching the short section of the oil pipe elevator, replacing a certain amount of pressurized well fluid after the upper end of the oil pipe lifting is connected with any flushing oil and a high-pressure hose, enabling the pressurized well fluid to pass through the forward washing pore passage of the sucker rod hanger, controlling the oil pipe to be sprayed, enabling the flushing oil layer and the flushing oil pipe hose to be detached, enabling the pressurized well to be capable of conveniently to flow along the upper part of the well lifting short section, enabling the pumping rod lifting short section to be convenient for preventing the pumping oil pipe column from the well, and enabling the pumping well to flow, and enabling the pumping oil pipe to be convenient for preventing the pumping well.
⒄ the method comprises installing a wellhead reducing flange above the wellhead cross-way, screwing a sucker rod short section above the sucker rod hanger, ⒅ hanging the sucker rod short section with a sucker rod hook and lifting it up, lifting the sucker rod hanger together with a sucker rod below the sucker rod hanger out of the wellhead reducing flange, then clamping a hanger below the upset flange of the next sucker rod, driving a hanger below the sucker rod hanger to seat on the wellhead reducing flange, ⒆ unloading the sucker rod with the sucker rod hanger, then using the sucker rod hanger to match the hanger I and the hanger II to lift all the underground oil pipes and dismantle them one by one, ⒇ lifting all the underground oil pipes and dismantle them one by one, reinstalling the wellhead reducing flange to support the hanger to lift and dismantle the sucker rod hanger and each sucker rod, after the sucker rod is lifted out, lifting the oil pipes and carrying out maintenance or replacement on the ground.
As a further improvement of the invention, the sucker rod hanger comprises a hanger cylinder body, the periphery of the middle part of the hanger cylinder body is provided with a cylinder body convex ring, and the cylinder body convex ring is supported at the upper port of the oil pipe joint; a lower sealing plate is pressed on a step at the middle section of the inner cavity of the cylinder body of the suspender, a ball valve is arranged above the lower sealing plate, an upper sealing plate is arranged above the ball valve, an upper connector of the suspender is pressed above the upper sealing plate, the upper connector of the suspender is screwed on the upper port of the cylinder body of the suspender, and the lower end of the short section of the sucker rod is screwed with the upper port of the upper connector of the suspender; the outer end of the valve rod of the ball valve is positioned in the window of the hanger cylinder; the lower port of the hanger cylinder body is screwed with a hanger lower joint, and the lower part of the hanger lower joint is screwed with the top of the wellhead sucker rod. The periphery of the upper sealing plate and the lower sealing plate is sealed with the inner wall of the cylinder body of the suspender through the sealing ring, and the upper sealing plate, the ball valve and the lower sealing plate are tightly pressed on the step of the small-bore section through the upper joint of the suspender. The sucker rod short joint is screwed on the upper end of the sucker rod hanger, the sucker rod is screwed below the sucker rod hanger, the ball valve is initially in a closed state, and if no blowout warning sign exists, the sucker rod can be directly lifted out. If the blowout precursor occurs or the wellhead overflows, the sucker rod hanger is lowered down to enable the convex ring of the cylinder body to be rested on the upper port of the oil pipe joint, the blowout can be effectively prevented because the ball valve is in a closed state, and a blowout prevention box is not required to be installed on the wellhead; the adverse effect caused by untimely well shut-in is effectively avoided, the environment is protected, and the production cost is reduced.
As a further improvement of the invention, the middle section of the lower joint of the hanger is provided with a lower joint conical body with a large upper part and a small lower part, the outer wall of the middle section of the lower joint conical body is provided with a lower joint radial hole communicated with the central hole of the lower joint of the hanger, a lower joint lower thread section is arranged below the lower joint conical body, and the lower joint lower thread section is screwed with the top of the sucker rod. When killing is needed, the ball valve is opened, then the oil pipe lifting short section is installed, then the oil pipe lifting short section is lifted, the conical hanger and the oil pipe column below the conical hanger are enabled to go upwards for a certain distance, a shear pin of the anchoring oil drain device at the lower part of the oil pipe column is cut off, a normal washing channel of the anchoring oil drain device is unsealed, then a certain amount of killing fluid is supplemented into the oil pipe from the well mouth, the killing fluid penetrates through the ball valve and enters a central hole of a lower connector of the hanger, and due to the fact that the outer diameter of the middle section of the conical body of the lower connector is far smaller than the inner diameter of the oil pipe, the killing fluid can smoothly flow out from the radial hole of the. Compared with backwashing well killing, the positive circulation well killing needs less well killing liquid, can solve the problem of oil layer pollution caused by backwashing of the low-permeability water-sensitive stratum, can improve the yield of crude oil, and has good application value.
As a further improvement of the invention, the axis of the ball valve is deviated from the axis of the hanger cylinder, and the flow passage of the ball valve is communicated with the central hole of the hanger cylinder. Because the middle part of the ball valve is provided with the valve rod which extends outwards, the ball valve is offset, the inner cavity of the cylinder body of the suspender is convenient for accommodating the whole ball valve, the installation of the ball valve in the cylinder body of the suspender is also convenient, the upper port and the lower port of the flow passage of the ball valve are completely exposed in the central hole of the cylinder body of the suspender, and the flow passage of the ball valve is prevented from being partially blocked due to the offset of the.
As a further improvement of the invention, the pipe heads at two ends of the ball valve are light pipes, the upper pipe head of the ball valve is inserted in the through hole of the upper sealing plate, and the periphery of the upper pipe head of the ball valve is embedded with an upper sealing ring of the ball valve; the lower pipe head of the ball valve is inserted in the through hole of the lower sealing plate, and the periphery of the lower pipe head of the ball valve is embedded with a lower sealing ring of the ball valve. Two ends of the traditional ball valve are connected through external threads or internal threads, so that the traditional ball valve is inconvenient to install in an inner cavity of a cylinder of the suspender; the two ends of the ball valve are inserted in the sealing plate by adopting the light pipes, the peripheries of the light pipes are sealed by the sealing rings, the ball valve is convenient to install and position quickly, and the sealing is good.
As a further improvement of the invention, the outer end of the valve rod of the ball valve is connected with a detachable square tenon. When the ball valve is installed, the square tenon at the outer end of the valve rod is detached, so that the overall dimension of the ball valve is smaller, the ball valve is convenient to install in the suspender cylinder, the square tenon is installed at the outer end of the valve rod after the ball valve is installed in place and fixed in the inner cavity of the suspender cylinder, a wrench is convenient to rotate the valve rod from the outside, and the opening and closing of the ball valve are realized.
As a further improvement of the invention, a lower joint polished rod section is arranged at the top of the lower joint of the hanger, a hanger lower joint small sealing ring is embedded in the periphery of the lower joint polished rod section to realize sealing with the inner wall of the hanger cylinder, a lower joint upper thread section is arranged below the lower joint polished rod section, the lower joint upper thread section is screwed in a lower port of the hanger cylinder, and a reducing section is arranged above the lower joint conical body and sleeved with a lower joint large sealing ring. The upper thread section of the lower joint realizes the fixation between the lower joint of the suspender and the cylinder body of the suspender, the small sealing ring of the lower joint of the suspender realizes the sealing between the lower joint of the suspender and the inner wall of the cylinder body of the suspender, and the large sealing ring of the lower joint realizes the sealing between the lower joint of the suspender and the inner wall of the oil pipe joint, thereby preventing blowout or positive circulation liquid leakage.
Drawings
FIG. 1 is a schematic structural diagram of a workover operation method for a low-permeability water-sensitive oil well according to the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
FIG. 3 is an enlarged view of the sucker rod hanger of FIG. 2.
In the figure: 1. a wellhead cross joint; 2. a conical hanger; 2a, connecting an oil pipe; 2b, lifting the short section by the oil pipe; 3. a sucker rod hanger; 3a, connecting the hanger with an upper joint; 3b, a suspender cylinder; 3b1, small aperture section; 3b2. barrel convex ring; 3b3. window; 3c, an upper sealing plate; 3d, a ball valve; 3d1. ball valve upper pipe head; 3d2. valve stem; 3d3. square tenon; 3d4. ball valve lower pipe head; 3e, a lower sealing plate; 3f, a hanger lower joint; 3f1. lower joint polished rod segment; 3f2. lower joint upper thread section; 3f3. lower joint large sealing ring; 3f4. lower joint cone; 3f5. lower joint radial hole; 3f6. lower joint lower thread section; 4. a short joint of the sucker rod; 5. a sucker rod; 6. a sleeve gate.
Detailed Description
A method for repairing the oil well with low water leakage includes such steps as hanging the first sucker rod on its hook, hanging the upper part of polish rod by the first sucker rod hook, removing the part of oil well tree above the three-way oil extraction joint, lifting the polish rod by ⑵ until the three-way oil extraction joint is exposed, hanging the second sucker rod by the second hook, lifting the hook until the three-way oil extraction joint is exposed, removing the polish rod by ⑶, removing the lift rod, removing the hook, removing the first sucker rod from the polish rod, ⑷, lifting the hook until the oil rod is exposed, removing the second sucker rod, removing the hook, removing the second sucker rod from the first hook, removing the lift rod from the three-way oil extraction joint, removing the lift rod hook from the lift rod, removing the lift rod from the lift hook, removing the lift rod from the lift rod, removing the lift rod lift hook from the lift rod, removing the lift rod lift joint from the lift joint, removing the lift rod lift the lift rod, removing the lift rod lift joint, removing the lift rod.
The lifting hook of the sucker rod is used as a lifting tool, the first elevator and the second elevator are alternately clamped below the upsetting flange of the sucker rod, and the upper flange of the oil extraction tee is used for supporting the elevator, so that when the thread of the sucker rod at the top is disassembled, the sucker rod below can be supported on the oil extraction tee, and the underground sucker rod can be conveniently lifted up one by one and disassembled.
⑼ the sucker rod hanger 3 is screwed on the top of the well mouth sucker rod 5, the sucker rod short section 4 is screwed on the top of the sucker rod hanger 3, the sucker rod short section 4 is hung by the sucker rod hook and lifted for a certain distance, the elevator I or elevator II on the well mouth sucker rod is removed, ⑽ the sucker rod hook goes down to make the sucker rod hanger 3 seat on the upper port of the oil pipe joint 2a, the oil pipe joint 2a is on the top of the down-hole oil pipe column and is screwed on the lower port of the conical hanger 2, the conical hanger 2 is sealed on the conical surface of the upper part of the inner cavity of the well mouth four-way 1.
The sucker rod hanger 3 is screwed on the top of the sucker rod 5, the sucker rod short section 4 is screwed above the sucker rod hanger 3, so that a sucker rod hook is convenient to hang, and after the sucker rod hanger 3 is seated on the upper port of the oil pipe joint 2a through lifting and placing of the sucker rod hook, because the central hole of the sucker rod hanger 3 is in a closed state, an upward channel of an oil pipe is cut off, so that the occurrence of wellhead overflow can be reliably prevented; and the blowout prevention box is prevented from being installed at the wellhead, the workload of installing the wellhead is reduced, and the internal blowout of the oil pipe can be quickly and effectively controlled in a short time. The sucker rod hanger 3 can move upwards along with the tubing string, so that the condition that the tubing string cannot be lifted upwards after the blowout prevention box is installed, and only backwashing well killing is performed is avoided.
The positive pressure well washing method further comprises the following steps of ⑾ detaching a wellhead reducing flange and an oil extraction tee joint above a wellhead cross joint 1, ⑿ opening a positive pressure well washing channel of a sucker rod hanger 3, screwing an oil pipe lifting short section 2b at an upper port of a conical hanger 2, ⒀ hanging the oil pipe lifting short section 2b by an oil pipe elevator, lifting the oil pipe lifting short section 2b for a certain distance to enable the conical hanger 2 to be separated from the wellhead cross joint 1, enabling a downhole oil pipe column to ascend along with the conical hanger 2 to enable a shear nail of an anchoring oil drain at the lower portion of the downhole oil pipe column to be sheared, unsealing the positive pressure well washing channel of the anchoring oil drain, ⒁ descending an oil pipe elevator to enable the conical hanger 2 to be re-seated in the wellhead cross joint 1, then removing the oil pipe short section, ⒂ replacing a certain amount of pressure well liquid after connecting any flushing oil and a high-pressure hose at the upper end of the lifting oil pipe 2b, enabling the pressure well washing liquid to pass through the positive pressure well washing channel of the sucker rod hanger 3 to enter the oil pipe column to control blowout to enable the wellhead to be stable, ⒃ detaching the oil pipe and.
The upper part of the wellhead cross joint 1 is removed, so that the forward washing pore passage of the sucker rod hanger 3 can be conveniently opened and the oil pipe lifting short joint 2b can be conveniently installed. The anchoring oil drain device is positioned at the lower part of the oil pipe column, and oil can only flow upwards along the inner cavity of the oil pipe after anchoring; according to the invention, the underground anchoring oil drain device is unsealed through the lifting nipple 2b of the oil lifting pipe, so that the well killing fluid can flow downwards along the inner cavity of the oil pipe column, and the normal flushing well killing is realized. And oil layer pollution of a low-permeability water-sensitive stratum caused by backwashing killing of the well is avoided.
If the forward washing pore canal of the sucker rod hanger 3 is opened and is interfered by the conical hanger 2, the sucker rod short section 4 is hung by the sucker rod lifting hook and lifted, the valve opening part of the sucker rod hanger 3 is exposed above the conical hanger 2, after the forward washing pore canal of the sucker rod hanger 3 is opened, the sucker rod hanger 3 is rested on the upper port of the oil pipe joint 2a, then the sucker rod short section 4 is removed, and the oil pipe lifting short section 2b is installed. The length of the sucker rod hanger 3 can also be lengthened, so that after the sucker rod hanger 3 is seated, the valve opening part of the sucker rod hanger is still exposed above the conical hanger 2, the opening and closing of the ball valve are not influenced, and the operation is still carried out according to the original steps.
⒄ reinstalling the reducing flange above the four-way 1, then reconnecting the short section 4 above the sucker rod hanger 3, ⒅ hanging the short section 4 and lifting it, lifting the hanger 3 and the sucker rod below it out of the reducing flange, then using the hanger to clamp under the upset flange of the next sucker rod, driving the hanger to seat on the reducing flange, ⒆ unloading the sucker rod connected with the hanger 3, then using the cooperation of the hanger to lift the hanger and the hanger, and disassembling all the sucker rods, ⒇ lifting all the oil pipes and disassembling them, reinstalling the reducing flange to support the hanger, so as to lift and disassemble the hanger 3 and each sucker rod, after the sucker rod is lifted, to overhaul the ground or replace the oil pipes.
As shown in fig. 1 to 3, the left side and the right side of the wellhead cross 1 are respectively connected with a casing gate 6 communicated with the casing annulus, a conical hanger 2 is seated on the conical surface of the upper part of the inner cavity of the wellhead cross 1, the lower port of the conical hanger 2 is screwed with an oil pipe joint 2a, an oil pipe column is connected below the oil pipe joint 2a, a sucker rod hanger 3 is inserted into the oil pipe joint 2a, the sucker rod hanger 3 comprises a hanger cylinder 3b, a cylinder convex ring 3b2 is arranged on the periphery of the middle part of the hanger cylinder 3b, and the cylinder convex ring 3b2 is supported on the upper port of the oil pipe joint 2a.
A small-bore section 3b1 is arranged in the middle section of the inner cavity of the suspender cylinder 3b, a lower sealing plate 3e is pressed on a step of the small-bore section 3b1, a ball valve 3d is arranged above the lower sealing plate 3e, an upper sealing plate 3c is arranged above the ball valve 3d, an upper suspender joint 3a is pressed above the upper sealing plate 3c, the upper suspender joint 3a is screwed at the upper port of the suspender cylinder 3b, and the upper port of the upper suspender joint 3a is screwed with a sucker rod nipple 4; the outer end of the valve rod of the ball valve 3d is positioned in the window 3b3 of the hanger cylinder 3 b; the lower port of the hanger cylinder 3b is screwed with a hanger lower joint 3f, and the lower part of the hanger lower joint 3f is screwed with the top of the sucker rod 5.
The outer peripheries of the upper seal plate 3c and the lower seal plate 3e are sealed with the inner wall of the hanger cylinder 3b by a seal ring, and the upper seal plate 3c, the ball valve 3d, and the lower seal plate 3e are pressed against the step of the small-bore section 3b1 by the hanger upper joint 3a. The sucker rod short joint 4 connects in the upper end of sucker rod hanger 3 soon, and sucker rod 5 connects in the below of sucker rod hanger 3 soon, and ball valve 3d is initial in the off-state, if there is not the blowout precursor, can directly propose sucker rod 5. If a blowout precursor occurs or well mouth overflow occurs, the sucker rod suspender 3 is lowered down, the barrel convex ring 3b2 is rested at the upper port of the oil pipe joint 2a, the ball valve 3d is in a closed state, blowout can be effectively prevented, and a blowout prevention box is not required to be installed at the well mouth; the adverse effect caused by untimely well shut-in is effectively avoided, the environment is protected, and the production cost is reduced.
An oil pipe lifting short section 2b is screwed at the upper end opening of the conical hanger 2, a lower-joint conical body 3f4 with a large upper part and a small lower part is arranged at the middle section of a lower-joint 3f of the hanger, a lower-joint radial hole 3f5 is arranged on the outer wall of the middle section of the lower-joint conical body 3f4 and communicated with a lower-joint central hole of the hanger, a lower-joint lower-thread section 3f6 is arranged below the lower-joint conical body 3f4, and a lower-joint lower-thread section 3f6 is screwed with the top of the sucker rod 5.
When killing is needed, firstly, a valve rod is rotated by a wrench at a window 3b3 of a hanger cylinder body 3b to open a ball valve 3d, then an oil pipe lifting short section 2b is installed, then the oil pipe lifting short section 2b is lifted, the conical hanger 2 and an oil pipe column below the conical hanger are enabled to move upwards for a certain distance, a shear pin of an anchoring oil drain at the lower part of the oil pipe column is cut off, a normal washing channel of the anchoring oil drain is unsealed, then a certain amount of killing fluid is supplemented into the oil pipe from a well head, the killing fluid passes through the ball valve 3d and enters a central hole of a lower connector of the hanger, and as the outer diameter of the middle section of a conical body 3f4 of the lower connector is far smaller than the inner diameter of the oil pipe, the killing fluid can smoothly flow out from the radial hole 3f5. Compared with backwashing well killing, the positive circulation well killing needs less well killing liquid, can solve the problem of oil layer pollution caused by backwashing of the low-permeability water-sensitive stratum, can improve the yield of crude oil, and has good application value.
The axis of the ball valve 3d deviates from the axis of the suspender cylinder 3b, and the flow passage of the ball valve 3d is communicated with the central hole of the suspender cylinder. Because the middle part of the ball valve 3d is provided with the valve rod which extends outwards, the ball valve 3d is offset, the inner cavity of the cylinder body 3b of the suspender is convenient for accommodating the whole ball valve 3d, the installation of the ball valve 3d in the cylinder body 3b of the suspender is also convenient, the upper port and the lower port of the flow passage of the ball valve are completely exposed in the central hole of the cylinder body of the suspender, and the flow passage of the ball valve is prevented from being partially blocked due to the offset of the.
The pipe heads at two ends of the ball valve 3d are light pipes, the upper pipe head 3d1 of the ball valve is inserted in the through hole of the upper sealing plate 3c, and the periphery of the upper pipe head is embedded with an upper sealing ring of the ball valve; the lower pipe head 3d4 of the ball valve is inserted in the through hole of the lower sealing plate 3e, and the periphery of the lower pipe head is embedded with a lower sealing ring of the ball valve. Two ends of the traditional ball valve are connected through external threads or internal threads, so that the traditional ball valve is inconvenient to install in the inner cavity of the hanger cylinder 3 b; the two ends of the ball valve are inserted in the sealing plate by adopting the light pipes, the peripheries of the light pipes are sealed by the sealing rings, the ball valve is convenient to install and position quickly, and the sealing is good.
The outer end of the valve rod of the ball valve 3d is connected with a detachable square tenon 3d3. When the ball valve 3d is installed, the square tenon 3d3 at the outer end of the valve rod is removed, so that the overall dimension of the ball valve 3d is smaller, the ball valve 3d is convenient to install in the suspender cylinder 3b, after the ball valve 3d is installed in place and fixed in the inner cavity of the suspender cylinder 3b, the square tenon 3d3 is installed at the outer end of the valve rod, the valve rod is convenient to rotate by adopting a wrench from the outside, and the opening and closing of the ball valve 3d are realized.
The top of the suspender lower joint 3f is provided with a lower joint polished rod section 3f1, the periphery of the lower joint polished rod section 3f1 is embedded with a suspender lower joint small sealing ring to realize sealing with the inner wall of the suspender cylinder 3b, a lower joint upper thread section 3f2 is arranged below the lower joint polished rod section 3f1, the lower joint upper thread section 3f2 is screwed in the lower port of the suspender cylinder 3b, and a reducing section is arranged above the lower joint conical body 3f4 and sleeved with a lower joint large sealing ring 3f3. The upper thread section 3f2 of the lower joint realizes the fixation between the lower joint 3f of the suspender and the cylinder body 3b of the suspender, the small sealing ring of the lower joint of the suspender realizes the sealing between the lower joint 3f of the suspender and the inner wall of the cylinder body 3b of the suspender, and the large sealing ring 3f3 of the lower joint realizes the sealing between the lower joint 3f of the suspender and the inner wall of the oil pipe joint 2a, so that the blowout or positive circulation liquid leakage can be prevented.
The outer diameter of the lower joint large seal ring 3f3 was 63mm, the outer diameters of the hanger cylinder 3b and the hanger upper joint 3a were 61mm, and the outer diameter of the cylinder convex ring 3b2 was 63 mm. The inner diameter of the oil pipe joint 2a is 62mm, and the part below the cylinder convex ring 3b2 is smaller than the inner diameter of the oil pipe joint 2a by 62mm, so that the insertion is convenient; the 63mm barrel flange 3b2 can be seated at the upper port of the tubing connector 2a to suspend the sucker rod hanger 3 at the top of the tubing connector 2a to facilitate the lifting of the sucker rod 5 out of the tubing string. The 63mm lower joint large seal ring 3f3 can ensure the seal between the outer periphery of the hanger lower joint 3f and the inner wall of the oil pipe joint 2a, and facilitate the insertion of the hanger lower joint 3f into the oil pipe joint 2a.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.
Claims (10)
1. A method for repairing oil well with low water leakage includes such steps as hanging the first sucker rod on its hook, hanging the upper part of polish rod by the first elevator, removing the part of oil well tree above the three-way oil pumping unit, lifting the polish rod by ⑵ until the three-way oil pumping unit is exposed, hanging the second elevator under the flange of the first sucker rod, lowering the second elevator to the three-way oil pumping unit, removing polish rod from ⑶, lowering the polish rod to remove the first elevator, removing the first elevator from polish rod, lifting the second sucker rod until the upper end of the second sucker rod is exposed, lowering the flange of the second sucker rod, lowering the first elevator to the three-way oil pumping unit, removing ⑸, lowering the first sucker rod, removing the second elevator, lowering the second elevator from the flange of the second sucker rod, lifting the second elevator from the flange of the third sucker rod, removing the second elevator from the third sucker rod, lowering the third elevator from the third sucker rod, removing the third elevator from the sucker rod, lifting the sucker rod from the sucker rod, removing the third elevator from the sucker rod, removing the sucker rod from its lift hook, removing the sucker rod from its lift rod, and removing the sucker rod from its lift rod, removing the sucker rod from its lift hook, removing the sucker rod from its lift rod, removing the sucker rod from its lift ring, and removing the sucker rod from its sucker rod lifting unit after it, removing the lift rod lifting unit, removing the lift clamp to remove the lift of the lift rod lift of.
2. The method of claim 1, wherein the well is repaired by screwing a sucker rod hanger above the sucker rod of the well head, screwing a sucker rod sub above the sucker rod hanger, hanging the sucker rod sub by a sucker rod hook and lifting the sucker rod sub for a certain distance, removing a first elevator or a second elevator on the sucker rod of the well head, descending a ⑽ sucker rod hook to make the sucker rod hanger be seated on the upper port of the tubing connector, the tubing connector being positioned on the top of the downhole tubing string and screwed on the lower port of the conical hanger, and the conical hanger being seated on the conical surface of the upper part of the inner cavity of the well head cross.
3. The method of claim 2, further comprising the steps of ⑾ removing the wellhead variable diameter flange and the production tee above the wellhead cross, ⑿ opening the forward flushing port of the sucker rod hanger, removing the short section of the sucker rod, screwing the tubing lifting short section to the upper port of the conical hanger, ⒀ hanging the tubing lifting short section with the tubing hanger, lifting the tubing lifting short section a distance to separate the conical hanger from the wellhead cross, shearing the shear pin of the oil drain at the lower part of the downhole tubing string with the ascending conical hanger, unsealing the forward flushing port of the oil drain, ⒁ lowering the tubing hanger to allow the conical hanger to be re-seated in the wellhead cross, removing the tubing hanger, ⒂ connecting any flushing oil and high pressure tubing to the upper end of the tubing lifting short section, replacing a certain amount of the pressure well fluid, passing through the forward flushing port of the sucker rod hanger, controlling the blowout well, stabilizing ⒃, removing the flushing oil and high pressure tubing, and removing the wellhead lifting hose.
4. The method of claim 3, further comprising the steps of installing ⒄ a wellhead reducing flange above the wellhead cross-way, connecting the sucker rod sub above the sucker rod hanger, hanging ⒅ the sucker rod sub by the sucker rod hanger and lifting it up, lifting the sucker rod hanger together with a sucker rod below the sucker rod hanger out of the wellhead reducing flange, clamping the sucker rod hanger below the upset flange of the next sucker rod by the first elevator, driving the first elevator on the wellhead reducing flange under the sucker rod hanger, unloading the sucker rod connected with the sucker rod hanger by ⒆, lifting and unloading all the sucker rods one by matching the sucker rod hanger with the first elevator and the second elevator, and lifting and unloading all the oil pipes one by one ⒇.
5. The method of workover treatment for a low permeability water sensitive oil well as claimed in claim 2, wherein: the sucker rod hanger comprises a hanger cylinder, a cylinder convex ring is arranged on the periphery of the middle part of the hanger cylinder, and the cylinder convex ring is supported at the upper port of the oil pipe joint; a lower sealing plate is pressed on a step at the middle section of the inner cavity of the cylinder body of the suspender, a ball valve is arranged above the lower sealing plate, an upper sealing plate is arranged above the ball valve, an upper connector of the suspender is pressed above the upper sealing plate, the upper connector of the suspender is screwed on the upper port of the cylinder body of the suspender, and the lower end of the short section of the sucker rod is screwed with the upper port of the upper connector of the suspender; the outer end of the valve rod of the ball valve is positioned in the window of the hanger cylinder; the lower port of the hanger cylinder body is screwed with a hanger lower joint, and the lower part of the hanger lower joint is screwed with the top of the wellhead sucker rod.
6. The method of workover treatment for a low permeability water sensitive oil well as claimed in claim 5, wherein: the middle section of the lower joint of the hanger is provided with a lower joint conical body with a large upper part and a small lower part, the outer wall of the middle section of the lower joint conical body is provided with a lower joint radial hole which is communicated with a central hole of the lower joint of the hanger, a lower joint lower thread section is arranged below the lower joint conical body, and the lower joint lower thread section is screwed with the top of the sucker rod.
7. The method of workover treatment for a low permeability water sensitive oil well as claimed in claim 5, wherein: the axis of the ball valve deviates from the axis of the suspender cylinder, and a flow passage of the ball valve is communicated with the central hole of the suspender cylinder.
8. The method of workover treatment for a low permeability water sensitive oil well as claimed in claim 5, wherein: the two end pipe heads of the ball valve are light pipes, the upper pipe head of the ball valve is inserted into the through hole of the upper sealing plate, and the periphery of the upper pipe head of the ball valve is embedded with an upper sealing ring of the ball valve; the lower pipe head of the ball valve is inserted in the through hole of the lower sealing plate, and the periphery of the lower pipe head of the ball valve is embedded with a lower sealing ring of the ball valve.
9. The method of workover treatment for a low permeability water sensitive oil well as claimed in claim 5, wherein: the outer end of the valve rod of the ball valve is connected with a detachable square tenon.
10. The method of workover treatment for a low permeability water sensitive oil well as claimed in claim 5, wherein: the top of suspension device lower clutch is equipped with lower clutch polished rod section, the periphery of lower clutch polished rod section is inlayed and is equipped with the little sealing washer of suspension device lower clutch and realizes sealing with the inner wall of suspension device barrel, the below of lower clutch polished rod section is equipped with screw thread section on the lower clutch, screw thread section connects soon in the lower port of suspension device barrel on the lower clutch, the top of lower clutch conical body is equipped with reducing section and cover and is equipped with the big sealing washer of lower clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910998658.9A CN110685616B (en) | 2019-10-21 | 2019-10-21 | Well repairing operation method for low-permeability water-sensitive oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910998658.9A CN110685616B (en) | 2019-10-21 | 2019-10-21 | Well repairing operation method for low-permeability water-sensitive oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110685616A true CN110685616A (en) | 2020-01-14 |
| CN110685616B CN110685616B (en) | 2020-11-27 |
Family
ID=69113388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910998658.9A Active CN110685616B (en) | 2019-10-21 | 2019-10-21 | Well repairing operation method for low-permeability water-sensitive oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110685616B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911099A (en) * | 2020-09-29 | 2020-11-10 | 胜利油田康贝石油工程装备有限公司 | Oil field well repairing operation process for realizing automation of sucker rod |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1450246A (en) * | 2003-04-18 | 2003-10-22 | 崔时光 | Automatic service rig for oil field |
| EP2578622A2 (en) * | 2011-10-06 | 2013-04-10 | Weatherford/Lamb Inc. | Enhanced oilfield swellable elastomers and methods for making and using same |
| US20140069630A1 (en) * | 2010-02-12 | 2014-03-13 | Cameron International Corporation | Integrated wellhead assembly |
| CN104632085A (en) * | 2013-11-13 | 2015-05-20 | 中国石油化工股份有限公司 | Derrick lifting holding pole for oil well and lifting method |
| CN204552640U (en) * | 2015-04-24 | 2015-08-12 | 中国石油天然气股份有限公司勘探开发研究院 | A kind of Oil/gas Well beam hanger pull-up |
| CN104963634A (en) * | 2015-07-02 | 2015-10-07 | 中国石油天然气股份有限公司 | Sucker rod tripping method |
| CN205036339U (en) * | 2015-08-25 | 2016-02-17 | 中国石油化工股份有限公司 | Sucker rod blowout preventer |
| CN106703718A (en) * | 2017-03-14 | 2017-05-24 | 三集团有限公司湖南分公司 | Sucker rod running and pulling device and sucker rod running and pulling system |
| CN110325704A (en) * | 2016-10-14 | 2019-10-11 | 卡乌斯博瑞利斯私人有限公司 | Pipe fitting or rod piece lifting device |
-
2019
- 2019-10-21 CN CN201910998658.9A patent/CN110685616B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1450246A (en) * | 2003-04-18 | 2003-10-22 | 崔时光 | Automatic service rig for oil field |
| US20140069630A1 (en) * | 2010-02-12 | 2014-03-13 | Cameron International Corporation | Integrated wellhead assembly |
| EP2578622A2 (en) * | 2011-10-06 | 2013-04-10 | Weatherford/Lamb Inc. | Enhanced oilfield swellable elastomers and methods for making and using same |
| CN104632085A (en) * | 2013-11-13 | 2015-05-20 | 中国石油化工股份有限公司 | Derrick lifting holding pole for oil well and lifting method |
| CN204552640U (en) * | 2015-04-24 | 2015-08-12 | 中国石油天然气股份有限公司勘探开发研究院 | A kind of Oil/gas Well beam hanger pull-up |
| CN104963634A (en) * | 2015-07-02 | 2015-10-07 | 中国石油天然气股份有限公司 | Sucker rod tripping method |
| CN205036339U (en) * | 2015-08-25 | 2016-02-17 | 中国石油化工股份有限公司 | Sucker rod blowout preventer |
| CN110325704A (en) * | 2016-10-14 | 2019-10-11 | 卡乌斯博瑞利斯私人有限公司 | Pipe fitting or rod piece lifting device |
| CN106703718A (en) * | 2017-03-14 | 2017-05-24 | 三集团有限公司湖南分公司 | Sucker rod running and pulling device and sucker rod running and pulling system |
Non-Patent Citations (1)
| Title |
|---|
| 胡科锋: "《百度文库》", 31 December 2011 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911099A (en) * | 2020-09-29 | 2020-11-10 | 胜利油田康贝石油工程装备有限公司 | Oil field well repairing operation process for realizing automation of sucker rod |
| CN111911099B (en) * | 2020-09-29 | 2020-12-04 | 胜利油田康贝石油工程装备有限公司 | Oil field well repairing operation process for realizing automation of sucker rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110685616B (en) | 2020-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11512549B2 (en) | Well surface safety valve assembly with a ball valve and back pressure valve | |
| US7717181B2 (en) | Artificial lift system | |
| US7578351B2 (en) | Configurable wellhead system with permanent fracturing spool and method of use | |
| CN105804680B (en) | A kind of oil gas field workover operation device with pressure and method | |
| US8261838B2 (en) | Artificial lift system | |
| CN104343400B (en) | The controllable workover treatment equipment of no killing well and its operational method | |
| CN110685616B (en) | Well repairing operation method for low-permeability water-sensitive oil well | |
| CN205605156U (en) | Workover device is pressed in oil gas field area | |
| CN211422607U (en) | Sand control tubular column and oil production system | |
| CN210948567U (en) | Wellhead anti-overflow suspension device for well repair | |
| RU2301885C1 (en) | Method for hydraulic fracturing of reservoir in gas well | |
| RU2631517C1 (en) | Method for mechanised pump operation of wells and device for its implementation | |
| CN210948539U (en) | Sucker rod hanger | |
| RU2601078C1 (en) | Method of suspending steel polymer flexible flush-joint pipe in well | |
| RU2626108C2 (en) | Method of well casing by tail pipe with bottomhole screen | |
| RU2592908C1 (en) | Method of extracting stuck pipes string of flexible pipes from well | |
| CN219316907U (en) | Quick blowout control device for lifting sucker rod | |
| CN106121590A (en) | Radial level boring is windowed filter back flush apparatus | |
| RU2306412C1 (en) | Method for hydraulic reservoir fracturing inside gas well | |
| CN105370235B (en) | A kind of well top sealing device | |
| RU2379467C1 (en) | Multihole low debit well conservation in abnormal low pressure reservoir conditions | |
| RU2614998C1 (en) | Method of deep gas well equipment with tubing string composition | |
| CN210440006U (en) | Oil-submersible electric pump well underground safety valve opening device | |
| CN104675359A (en) | Safe shale gas well plugging device | |
| CN202249894U (en) | Large-diameter wellhead assembly easy to assemble and disassemble |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230529 Address after: 225009 No.1, Wenhui West Road, Yangzhou Economic Development Zone, Jiangsu Province Patentee after: SINOPEC Group Patentee after: SINOPEC GROUP JIANGSU PETROLEUM EXPLORATION BUREAU Co.,Ltd. Patentee after: JIANGSU OILFIELD MINING DEVELOPMENT Co.,Ltd. Address before: 225009 No.1, Wenhui West Road, Yangzhou Economic Development Zone, Jiangsu Province Patentee before: JIANGSU OILFIELD MINING DEVELOPMENT Co.,Ltd. |