CN111577246A - Blowout prevention autonomous lifting pressurized logging construction process - Google Patents
Blowout prevention autonomous lifting pressurized logging construction process Download PDFInfo
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- CN111577246A CN111577246A CN202010525475.8A CN202010525475A CN111577246A CN 111577246 A CN111577246 A CN 111577246A CN 202010525475 A CN202010525475 A CN 202010525475A CN 111577246 A CN111577246 A CN 111577246A
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- blowout
- blowout prevention
- lifting frame
- lifting
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- 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
- E21B47/00—Survey of boreholes or wells
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- 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
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- 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
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
Abstract
The invention discloses a blowout prevention autonomous lifting under-pressure well logging construction process, which belongs to the technical field of oil field well logging operation, wherein the vertical installation and the disassembly of a blowout prevention device are realized through a base support and a suspension bracket on the base support, the autonomous lifting under-pressure well logging construction of the blowout prevention device under the condition of no derrick car is realized, 1 professional derrick car and 1 professional operator are saved in the configuration of a single operation team, the construction cost is greatly reduced, compared with a well frame car, the annual cost of each operation team can be saved by nearly 40 ten thousand yuan by applying the process technology, and the production benefit is remarkably improved.
Description
Technical Field
The invention belongs to the technical field of oil field logging operation, and relates to a blowout prevention autonomous lifting under-pressure logging construction process.
Background
The pressure logging construction operation needs to use a high-pressure blowout preventer to control a wellhead, wherein a sealing head is used for sealing liquid in a well, a blowout prevention pipe string is used for containing a logging instrument string, a pressure balance bin is constructed for logging instruments to enter and exit the well, and a drop preventer is used for preventing the logging instruments from falling down from the well accidentally. Because the length of the well descending instrument and the weighting rod for balancing the pressure of the well head are combined to be larger, the length of the blowout prevention pipe string is correspondingly larger, and the typical situation is about 13m, in the installation and construction of the traditional well descending instrument, the blowout prevention pipe string is firstly connected in series under the ground horizontal state by manpower, and then lifted to the position right above the well head Christmas tree by a special well frame vehicle or a matched lifting appliance for a truck crane and then is installed in a butt joint mode, the blowout prevention pipe keeps a closed high-pressure working state in the well logging process, the well frame vehicle is used for separating the blowout prevention pipe string from the well head Christmas tree after the well logging is completed, and then the blowout prevention pipe string is manually dismantled and decomposed after being laid down to the ground horizontal.
Therefore, each logging team must be equipped with a derrick car and a full-time operator, the derrick cars belong to special modified equipment, so that the number of manufacturers is small, the cost of purchasing new cars, daily operation and maintenance and the cost of professional human resources for evidence keeping are not small, the benefit of logging production is directly influenced, and more traffic accident opportunity cost is also implied by adding one more motor vehicle.
In addition, due to the characteristics of the weight, the length, the passing capacity and the like of the well frame vehicle, the well frame vehicle cannot adapt to adverse road conditions such as extremely steep mountain roads, height limitation, sharp bends, weight limitation and the like, cannot be used under special conditions such as ocean platforms (artificial islands), shallow water, marshes, deserts and the like, and severely limits the application of the logging technology under pressure.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a blowout-preventing autonomous lifting pressurized logging construction process, so as to solve the problems of high cost and limited application range caused by using a derrick car in the conventional construction process.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a blowout prevention autonomous lifting pressurized logging construction process comprises the following steps:
fixing a base support on the horizontal ground through an adjusting rod, detachably fixing a blowout prevention node on a wellhead Christmas tree, detachably mounting an anti-drop device above the blowout prevention node, and fixing the anti-drop device on the outer side of the base support through a mechanical connection structure;
mounting the suspension bracket on the top of the base bracket, fixing the sealing head above the suspension bracket, and vertically connecting the blowout preventing pipe string to the lower part of the sealing head by using the base bracket;
thirdly, installing a downhole instrument according to the well logging requirement, and then vertically installing the blowout-preventing pipe string on the top of the drop preventer by rotating the suspension bracket to complete the installation work of the blowout preventer;
opening a valve of a wellhead Christmas tree, and lowering a cable and a downhole instrument to perform well logging;
and step five, after the well logging is completed, closing the test valve and releasing pressure, disassembling the blowout preventer and completing the autonomous lifting pressurized well logging construction.
Preferably, the base support comprises a guide stabilizer bar, a gear structure and a lifting frame arranged on one side of the gear structure, the guide stabilizer bar is arranged perpendicular to the horizontal plane, the gear structure comprises a reduction gear set arranged on one side of the guide stabilizer bar, the reduction gear set comprises a driving gear connected with the lifting frame, a motor connected with the driving gear is arranged on the lower portion of the lifting frame, the motor is electrically connected with an external controller I, and a rack rail connected with the driving gear is arranged on the outer side of the guide stabilizer bar;
preferably, the suspension bracket comprises a hydraulic piston rod, a support rod and a limiting slip, the hydraulic piston rod is vertically installed at the top of the base bracket, the support rod is connected to the top of the hydraulic piston rod, and the limiting slip is connected to the outer side of the support rod; the limiting slips are provided with handles, and hydraulic piston rods are connected with an external manual hydraulic pump.
Preferably, step two comprises the steps of:
1) the sealing head is lifted to the height of the suspension bracket by manpower, and the limiting slips (8) are closed by screwing in the handle to fixedly clamp the sealing head;
2) vertically placing a blowout prevention pipe on a lifting frame, controlling the motor to be opened through a controller I, driving a driving gear to rotate by the motor, driving the lifting frame to vertically ascend by the driving gear, rotating the blowout prevention pipe to enable the blowout prevention pipe to be in threaded connection with the bottom of a sealing head when the top of the blowout prevention pipe on the lifting frame is in contact with the bottom of the sealing head, opening a limiting slip through a rotating-back handle, and continuously ascending the lifting frame;
3) the lifting frame drives the lubricator and the sealing head at the upper part of the lubricator to vertically rise, when the tail part of the lubricator reaches the position of the limiting slip, the limiting slip is closed through the screwing handle, the lubricator is clamped and fixed above the suspension bracket, and the installation of the first lubricator is completed;
4) the controller I controls the motor to drive the lifting frame to descend;
5) and (3) repeating the step 2), the step 3) and the step 4) in sequence, connecting a plurality of blowout preventers to the bottom of the first blowout preventer in a head-to-tail connection mode in sequence to form a blowout preventer string, and fixing the blowout preventer string to the bottom of the sealing head through a limiting slip (8).
Preferably, in the step 1), a top pulley is installed on the outer side of the sealing head, and a ground pulley is installed on the outer side of the blowout prevention joint; and a logging cable is arranged between the top pulley and the ground pulley.
Preferably, the specific operation of step three is: the hydraulic piston rod rises to drive the stay bar and the limiting slips to rise, the stay bar is rotated to enable the limiting slips to rotate along the horizontal plane, the blowout-preventing pipe string fixed on the limiting slips rotates to the position right above the anti-falling device along the horizontal plane, and the bottom of the blowout-preventing pipe string is connected with the top of the anti-falling device through the falling of the hydraulic piston rod.
Preferably, step five comprises:
1) closing the Christmas tree testing valve, releasing pressure through the blowout prevention joint, and disconnecting the blowout prevention pipe from the anti-drop device;
2) the controller I controls the motor to be started to drive the lifting frame to ascend, the hydraulic piston rod is controlled to ascend through an externally-connected manual hydraulic pump, the hydraulic piston rod ascends to drive the stay bar and the limiting slips to ascend and lift the blowout-preventing pipe string, then the blowout-preventing pipe string on the limiting slips is driven to rotate through the stay bar and stops when the hydraulic piston rod is right above the lifting frame, and the externally-connected manual hydraulic pump is used for controlling the hydraulic piston rod to descend to enable the blowout-preventing pipe string to be placed down and disassemble the blowout-preventing pipe string;
3) and disassembling the sealing head, and disassembling the base support, the anti-drop device and the anti-blowout joint from the wellhead Christmas tree to finish the disassembling work of all the equipment.
Preferably, the disassembly of the blowout preventer stack comprises: firstly, lifting a lifting frame to be in contact with the bottom of a blowout preventer string, unloading a suspension bracket, dismantling a downhole instrument, opening a limit slip through a screwing-back handle, controlling a motor through a controller I, enabling the lifting frame to descend by the length of one blowout preventer, dismantling one blowout preventer at the bottom of the blowout preventer string, and closing the limit slip through a screwing-in handle; and then repeating the steps to sequentially disassemble the blowout preventer string from bottom to top.
Preferably, in the base bracket, two guide stabilizer bars are provided, and two rack rails are provided, the two rack rails being respectively provided at both sides of the guide stabilizer bar.
Preferably, in the base support, the motor is a printed dc motor.
Preferably, in the hanger bracket, the limiting slip is a two-piece manual slip, the limiting slip comprises an inner tile and an outer barrel, the inner tile is provided with a flange, the inner tile is matched with the outer barrel in a sitting type manner, and the slip is opened and closed by screwing in and out of a handle.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a blowout prevention autonomous lifting pressurized logging construction process, which comprises the steps of firstly installing a blowout prevention node on a wellhead Christmas tree, then installing an anti-drop device on the blowout prevention node, and vertically connecting a blowout prevention pipe string to the bottom of a sealing head through a base support and suspension frames on the base support. According to the well logging construction process, the autonomous lifting and pressurized well logging construction of the blowout preventer under the condition of no derrick car is realized through vertical mounting and dismounting, 1 professional derrick car and 1 professional operator are omitted due to the configuration of a single operation team, the construction cost is greatly reduced, and compared with the well logging car, the annual cost of each operation team can be saved by nearly 40 ten thousand yuan by applying the process technology, and the production benefit is improved. The advantage of small size, light weight and convenient movement of the system is benefited, and the problem that high-pressure well logging is limited due to the fact that derrick trucks such as severe roads, ocean platforms, shoals, swamps and deserts are difficult to use is solved.
Further, the blowout preventer string is installed through the lifting frame on the base support, the controller I controls the motor to be opened, the motor provides power for the driving gear to enable the driving gear to move, and the driving gear rotates to drive the lifting frame to ascend or descend so as to drive the blowout preventer on the lifting frame to ascend and descend. The hydraulic piston rod is driven to move up and down through the control of the hand pump, so that the blowout preventer string fixed on the limiting slips can ascend and descend; the handle is screwed in and screwed out to drive the limiting slips to open and close, so that the limiting slips are temporarily fixed to the sealing head and the blowout-preventing pipe string, and the installation and the disassembly of the blowout-preventing pipe string are facilitated. The blowout preventer is vertically installed on the top of the drop preventer through the suspension bracket, the installation work of the blowout preventer is completed, then logging is carried out, and the blowout preventer is disassembled in the sequence opposite to the installation sequence after logging is finished.
Furthermore, a top pulley is arranged on the outer side of the sealing head, and a ground pulley is arranged on the outer side of the blowout prevention joint; the cable is arranged between the top pulley and the ground pulley, so that the cost of used equipment is low and the operation is easy under the condition of saving manpower, and the universality of the construction process is higher.
Furthermore, the blowout-preventing pipe string is controlled to rotate horizontally through the hydraulic piston rod and the support rod in the suspension bracket, so that the blowout-preventing pipe string can be positioned right above the anti-drop device, and the blowout-preventing pipe string and the anti-drop device are connected in the vertical direction.
Further, two guide stabilizer bars and two rack rails are arranged, so that the base support keeps the stability of the device when the logging device and the blowout preventer are installed in a lifting mode, and the construction safety and the logging efficiency are improved.
Furthermore, the limiting slips can be arranged into two manual types, and are easy to open and close on the premise of saving cost. The motor is a printed direct current motor, is suitable for the field of oil field logging, and can enlarge the application range of the logging construction process.
Drawings
FIG. 1 is a schematic diagram of a process for docking a lifting apparatus with a wellhead Christmas tree;
FIG. 2 is a schematic view of a vertical assembly process of the blowout preventer;
FIG. 3 is a schematic view of the docking process of the blowout preventer with a wellhead Christmas tree;
FIG. 4 is a schematic view of the structure of the base frame;
FIG. 5 is a mechanical drive schematic of the base bracket;
FIG. 6 is a view of the hanger bracket in an operational position in connection with the lubricator;
fig. 7 is a schematic diagram of the operation of the rotation of the suspension bracket.
Wherein: 1-a guide stabilizer bar; 2-a reduction gear set; 3-driving the gear; 31-motor output gear; 32-output gear; 33-a transmission wheel; 34-a gearbox; 4-a rack rail; 41-a rack; 5-an electric motor; 6-lifting frame; 7-lubricator body; 8-limiting slips; 9-a drop preventer; 10-a strut; 11-hydraulic piston rod.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
the invention is a construction process for blowout prevention autonomous lifting well logging under pressure based on a base support, the structural schematic diagram of the base support is shown in figure 4, the construction process comprises a guide stabilizer bar 1, a gear structure and a lifting frame 6 arranged on one side of the gear structure, the guide stabilizer bar 1 is arranged vertical to the horizontal plane, the gear structure comprises a reduction gear set 2 arranged on one side of the guide stabilizer bar 1, the reduction gear set comprises a driving gear 3 connected with the lifting frame 6, the driving gear 3 is arranged on the side of the lifting frame 6, the lower part of the lifting frame 6 is provided with a motor 5 connected with the driving gear 3, and the driving gear 3 and the side of the guide stabilizer bar 1 are provided with a rack; the working principle of the base support is shown in fig. 5, the motor 5 is controlled by the external controller I, the motor 5 drives the driving gear 3 to rotate, and the driving gear 3 drives the lifting frame 6 to ascend or descend.
The suspension bracket is arranged at the top of the base bracket and comprises a hydraulic piston rod 11, a support rod 10 and a limiting slip 8, the hydraulic piston rod 11 is vertically arranged at the top of the base bracket, the support rod 10 is connected to the top of the hydraulic piston rod 11, and the limiting slip 8 is connected to the outer side of the support rod 10; the hydraulic piston rod 11 is connected with an external manual hydraulic pump. The manual hydraulic pump drives the hydraulic piston rod 11 to ascend or descend; the rotating handle can push the limiting slips 8 to be opened or closed, so that the temporary fixing of the blowout preventer is achieved.
Example one
As shown in FIGS. 1 to 3, the blowout prevention autonomous lifting pressurized logging construction process comprises the following steps:
the first step is as follows: firstly, the blowout prevention joint is connected with a wellhead Christmas tree, then an anti-drop device is arranged above the blowout prevention joint, a ground pulley is arranged on the outer side of the blowout prevention joint, the anti-drop device is connected with a base support through a mechanical connecting mechanism, and the bottom of the base support is fixed on the ground through an adjusting rod to form a stable foundation of the whole lifting system.
The second step is that: the suspension bracket is arranged at the top of the base bracket, the cable is arranged in the crown block, the sealing head is arranged above the suspension bracket, and the sealing head is temporarily fixed at the position through the limiting slips 8. The manpower is with vertical placing of first lubricator on the lifting frame, open motor 5 through controller I, motor 5 drives drive gear 3 and rotates, drive gear 3 drives lifting frame 6 and rises perpendicularly, when the bottom of the top of the lubricator on lifting frame 6 and sealing head contacted, rotatory lubricator, make lubricator and sealing head carry out threaded connection, open spacing slips 8 through rotatory handle, make lifting frame 6 continue to rise, lifting frame 6 drives the lubricator and rises, when the afterbody of first lubricator reachs the position of spacing slips 8, utilize spacing slips 8 to press from both sides the lubricator once more, and fix in the top of mounted frame, accomplish the installation of first lubricator. The controller I controls the motor 5 to drive the lifting frame 6 to descend, a second blowout prevention pipe is vertically placed on the lifting frame 6 by manpower, the lifting frame 6 is operated again to ascend the second blowout prevention pipe to the tail part of the first blowout prevention pipe to be connected, the limiting slips 8 are opened by rotating the handle so that the lifting frame continues to ascend until the tail part of the second blowout prevention pipe can be locked by the limiting slips 8, the actions are repeated to connect a plurality of set blowout prevention pipes (the last blowout prevention pipe is marked as N) into the blowout prevention pipe string one by one, and the whole blowout prevention pipe string is fixed on the suspension bracket by the limiting slips 8.
The third step: according to the logging needs vertical installation instrument of going into the well one by one, drive hydraulic piston rod 11 through manual hydraulic pump and rise, thereby drive vaulting pole 10 and spacing slips 8 and rise, rotate through manual promotion vaulting pole 10, the rotation of vaulting pole 10 makes spacing slips 8 rotatory along the horizontal plane, thereby make fixed prevent gushing out the pipe cluster on the spacing slips 8 and rotate to preventing falling directly over the ware along the horizontal plane, control hydraulic piston rod 11 through manual hydraulic pump and descend, make the bottom of preventing gushing out the pipe cluster be connected with preventing falling the top of ware. Therefore, the complete wellhead blowout preventer is located on a wellhead Christmas tree, the wind-resistant rope is tensioned, the ground anchor is nailed tightly, and the installation work of all the blowout preventers is completed.
The fourth step: and opening a wellhead Christmas tree test valve, lowering a cable and lowering a downhole instrument for logging, and lifting the cable after logging is completed so that the downhole instrument can completely enter the lubricator.
The fifth step: 1) closing the Christmas tree testing valve, releasing pressure through the blowout prevention joint, and disassembling the blowout prevention pipe and the anti-drop device;
2) the lifting frame 6 is driven to ascend through the motor 5, the hand-operated pressure pump is operated to ascend and rotate the support rod 10 to drive the blowout-preventing pipe string to rotate to the position right above the lifting frame 6, the downhole instrument is kept at the highest position in the blowout-preventing pipe, the wind-resistant rope and the ground anchor are loosened, the blowout-preventing pipe string is lowered through the descending of the hydraulic piston rod 11 until the bottom of the blowout-preventing pipe string is contacted with the lifting frame 6, the suspension frame is unloaded, and the blowout-preventing pipe string is sequentially disassembled from bottom to top;
3) and disassembling the sealing head, and disassembling the base support, the anti-drop device and the anti-blowout joint from the wellhead Christmas tree to finish the disassembling work of all the equipment.
Lowering cables to detach downhole instruments one by one, lifting the lifting frame 6 through the controller I, lifting the whole blowout preventer string, opening the limiting slips 8 through rotating the handle, operating the lifting frame 6 to descend to the lower parts of the N-1 blowout preventers through the controller I, fixing the N-1 blowout preventers through the limiting slips 8, locking the blowout preventer string, detaching the N (namely, the 1 st to last) blowout preventers, then performing cyclic operation to vertically detach all the blowout preventers of the blowout preventer string one by one, finally detaching the sealing head and the crown block according to the reverse sequence of the step two and the step one, detaching the base support, the anti-drop device and the blowout release joint from the Christmas tree, and completing the detachment work of all equipment.
In this embodiment, the external controller I is a PLC controller, the used motor 5 is a printed dc motor, and the used limiting slip 8 is a two-piece manual slip.
Example two
Logging in an island well site in a water network zone by using the process of the invention
The logging process steps are the same as the first embodiment
For an island type well field affected by seasonal flood plain or agricultural production of peripheral paddy fields, in the past, a logging truck and a derrick truck cannot enter a construction field due to the limitation of the traffic capacity of the logging truck and the derrick truck on a shallow muddy road, logging can only be implemented in a dry season or in a winter water body icing period, and only 1 well can be operated every day due to short sunshine time and low air temperature, each well can generally only be tested for 1 time every year, the data lag condition is serious, the water injection condition change cannot be timely mastered and the water injection policy can not be adjusted, so that the crude oil yield is affected, the invalid water injection cost is wasted, and a plurality of field production operation risks such as oil production tree icing, cable slippage and the like are also borne.
After the logging construction process is applied, no derrick car matching is needed, even in rainy season, construction can be carried out by a conventional logging car far away from a well site or a tractor-dragging type and tugboat type logging winch with higher traffic capacity, the vehicle is not difficult to drive into the well site, operation can be completed only by manually conveying the blowout preventer and a downhole instrument into the well site, an operation team can complete logging work of at least 2 wells every day in summer which cannot be constructed in the past, each well can complete monitoring for at least 2 times every year, and a logging service company and an oil field exploitation unit can greatly benefit from the operation.
EXAMPLE III
Logging construction on ocean platform by using the process of the invention
When the offshore platform is constructed, the base support, the downhole instrument, the suspension bracket and the like are hoisted to the position near the Christmas tree by the ship crane, 2 operators are used for completing wellhead installation by manpower for about half an hour, and the installation steps of the logging process are the same as those of the first embodiment. By utilizing the process of the invention, the ship crane which occupies high cost as the prior art is not needed. Compared with the existing manual or hydraulic simple mast type hoisting device, the vertical hoisting mode has the advantages that the mast system is subtracted, the hoisting moment influence is avoided, the operation capacity is stronger, the typical hoisting height is increased to more than 8m from 4-5m, the wellhead pressure is increased to more than 21MPa (more weighting rods can be connected) from about 14MPa, the transportation length of the system is shortened to about 2m from about 6m, the transportation weight is reduced by about 200Kg, and the weight of the minimum non-detachable component needing manual transportation is reduced to 30Kg from 100 Kg.
In conclusion, after the process is applied, no derrick car matching is needed, even in rainy seasons, construction can be carried out through a conventional logging truck far away from a well site or a tractor-dragged skid type and tugboat type logging winch with higher traffic capacity, the crane is not difficult to drive into the well site, operation can be completed only by manually conveying the blowout preventer and a downhole instrument into the well site, an operation team can complete at least 2 wells every day in summer where construction cannot be carried out in the past, each well can complete monitoring for at least 2 times every year, and logging service companies and oil extraction units can greatly benefit from the process.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A blowout prevention autonomous lifting pressurized logging construction process is characterized by comprising the following steps:
fixing a base support on the horizontal ground through an adjusting rod, detachably fixing a blowout prevention node on a wellhead Christmas tree, detachably mounting an anti-drop device above the blowout prevention node, and fixing the anti-drop device on the outer side of the base support through a mechanical connection structure;
mounting the suspension bracket on the top of the base bracket, fixing the sealing head above the suspension bracket, and vertically connecting the blowout preventing pipe string to the lower part of the sealing head by using the base bracket;
thirdly, installing a downhole instrument according to the well logging requirement, and then vertically installing the blowout-preventing pipe string on the top of the drop preventer by rotating the suspension bracket to complete the installation work of the blowout preventer;
opening a valve of a wellhead Christmas tree, and lowering a cable and a downhole instrument to perform well logging;
and step five, after the well logging is completed, closing the test valve and releasing pressure, disassembling the blowout preventer and completing the autonomous lifting pressurized well logging construction.
2. A blowout-preventing autonomous lifting well logging construction process under pressure according to claim 1, characterized in that the base support comprises a guide stabilizer bar (1), a gear structure and a lifting frame (6) installed on one side of the gear structure, the guide stabilizer bar (1) is arranged perpendicular to the horizontal plane, the gear structure comprises a reduction gear set (2) installed on one side of the guide stabilizer bar (1), the reduction gear set (2) comprises a driving gear (3) connected with the lifting frame (6), an electric motor (5) connected with the driving gear (3) is installed on the lower portion of the lifting frame (6), the electric motor (5) is electrically connected with an external controller I, and a rack rail (4) connected with the driving gear (3) is installed on the outer side of the guide stabilizer bar (1);
the suspension bracket comprises a hydraulic piston rod (11), a support rod (10) and a limiting slip (8), the hydraulic piston rod (11) is vertically installed at the top of the base support, the support rod (10) is connected to the top of the hydraulic piston rod (11), and the limiting slip (8) is connected to the outer side of the support rod (10); the limiting slip (8) is provided with a handle, and a hydraulic piston rod (11) is connected with an external manual hydraulic pump.
3. The blowout-preventing autonomous lifting pressurized logging construction process according to claim 2, wherein the second step comprises the following steps:
1) the sealing head is lifted to the height of the suspension bracket by manpower, and the limiting slips (8) are closed by screwing in the handle to fixedly clamp the sealing head;
2) vertically placing a blowout prevention pipe on a lifting frame (6), controlling an electric motor (5) to open through a controller I, driving a driving gear (3) to rotate by the electric motor (5), driving the lifting frame (6) to vertically ascend by the driving gear (3), rotating the blowout prevention pipe to enable the blowout prevention pipe to be in threaded connection with the bottom of a sealing head when the top of the blowout prevention pipe on the lifting frame (6) is contacted with the bottom of the sealing head, opening a limiting slip (8) through a rotating-back handle, and continuously ascending the lifting frame (6);
3) the lifting frame (6) drives the lubricator and the sealing head at the upper part of the lubricator to vertically rise, when the tail part of the lubricator reaches the position of the limiting slip (8), the limiting slip (8) is closed through a screwing handle, the lubricator is clamped and fixed above the suspension bracket, and the installation of the first lubricator is completed;
4) the controller I controls the motor (5) to drive the lifting frame (6) to descend;
5) and (3) repeating the step 2), the step 3) and the step 4) in sequence, connecting a plurality of blowout preventers to the bottom of the first blowout preventer in a head-to-tail connection mode in sequence to form a blowout preventer string, and fixing the blowout preventer string to the bottom of the sealing head through a limiting slip (8).
4. The blowout-preventing autonomous lifting well logging construction process with pressure according to claim 2, characterized in that in the step 1), a crown block is installed on the outer side of the sealing head, and a ground block is installed on the outer side of the blowout-preventing joint; and a logging cable is arranged between the top pulley and the ground pulley.
5. The blowout-preventing autonomous lifting pressurized logging construction process according to claim 2, characterized in that the specific operation of the third step is as follows: the hydraulic control device is characterized in that a hydraulic piston rod (11) rises to drive a stay rod (10) and a limiting slip (8) to rise, the stay rod (10) is rotated to enable the limiting slip (8) to rotate along a horizontal plane, a blowout prevention pipe string fixed on the limiting slip (8) rotates to the position right above an anti-falling device along the horizontal plane, and the bottom of the blowout prevention pipe string is connected with the top of the anti-falling device through the falling of the hydraulic piston rod (11).
6. The blowout-preventing autonomous lifting pressurized logging construction process according to claim 2, wherein the fifth step comprises:
1) closing the Christmas tree testing valve, releasing pressure through the blowout prevention joint, and disconnecting the blowout prevention pipe from the anti-drop device;
2) the controller I controls the motor (5) to be opened to drive the lifting frame (6) to ascend, a hydraulic piston rod (11) is controlled to ascend through an external manual hydraulic pump, the hydraulic piston rod (11) ascends to drive a stay bar (10) and a limiting slip (8) to ascend to lift the blowout prevention pipe string, then the blowout prevention pipe string on the limiting slip (8) is driven to rotate through the stay bar (10), the blowout prevention pipe string stops when the blowout prevention pipe string is located right above the lifting frame (6), the hydraulic piston rod (11) descends through the external manual hydraulic pump to enable the blowout prevention pipe string to be lowered, and the blowout prevention pipe string is disassembled;
3) and disassembling the sealing head, and disassembling the base support, the anti-drop device and the anti-blowout joint from the wellhead Christmas tree to finish the disassembling work of all the equipment.
7. The blowout-prevention autonomous lifting pressurized logging construction process according to claim 6, wherein the disassembly of the blowout-prevention pipe string comprises: firstly, lifting a lifting frame (6) to be in contact with the bottom of a blowout preventer string, unloading a suspension bracket, removing a downhole instrument, opening a limiting slip (8) by rotating and retreating a handle, controlling a motor (5) by a controller I, descending the lifting frame (6) by the length of one blowout preventer, removing a blowout preventer at the bottom of the blowout preventer string, and closing the limiting slip (8) by rotating and advancing the handle again; and then repeating the steps to sequentially disassemble the blowout preventer string from bottom to top.
8. A blowout-preventing autonomous lifting well logging construction process under pressure according to claim 2, characterized in that two guide stabilizer bars (1) are arranged in the base support, two rack rails (4) are arranged, and the two rack rails (4) are respectively arranged on two sides of the guide stabilizer bars (1).
9. The blowout-preventing autonomous lifting pressurized logging construction process according to claim 2, wherein in the base support, the motor (5) is a printed direct current motor.
10. The blowout-preventing autonomous lifting well logging construction process under pressure according to claim 2, characterized in that in the suspension bracket, the limiting slips (8) are two-piece manual slips, the limiting slips (8) comprise an inner tile and an outer cylinder, the inner tile is provided with a flange, the inner tile is matched with the outer cylinder in a sitting type manner, and the slips are opened and closed through screwing in and screwing out of a handle.
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| CN202010525475.8A CN111577246A (en) | 2020-06-10 | 2020-06-10 | Blowout prevention autonomous lifting pressurized logging construction process |
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| CN202010525475.8A CN111577246A (en) | 2020-06-10 | 2020-06-10 | Blowout prevention autonomous lifting pressurized logging construction process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177556A (en) * | 2020-09-22 | 2021-01-05 | 宝鸡市赛孚石油机械有限公司 | Wellhead grabbing and lifting operation mode of pumping cable blowout preventer |
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| CN108360865A (en) * | 2018-04-23 | 2018-08-03 | 宜春学院 | A kind of mechanical bicycle garage |
| CN109695427A (en) * | 2018-10-31 | 2019-04-30 | 宝鸡市赛孚石油机械有限公司 | A kind of lubricator vertical lifting system |
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- 2020-06-10 CN CN202010525475.8A patent/CN111577246A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108360865A (en) * | 2018-04-23 | 2018-08-03 | 宜春学院 | A kind of mechanical bicycle garage |
| CN109695427A (en) * | 2018-10-31 | 2019-04-30 | 宝鸡市赛孚石油机械有限公司 | A kind of lubricator vertical lifting system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177556A (en) * | 2020-09-22 | 2021-01-05 | 宝鸡市赛孚石油机械有限公司 | Wellhead grabbing and lifting operation mode of pumping cable blowout preventer |
| CN112177556B (en) * | 2020-09-22 | 2022-12-13 | 宝鸡市赛孚石油机械有限公司 | Wellhead grabbing and lifting operation mode of pumping cable blowout preventer |
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