How to pull the casing out of the well: rules for dismantling

Alternative method

To work with a polymer liner, it is necessary to install a winch with a block designed for 1.5 tons. The weight of the polymer is not very large and even a mechanism with low power can cope with the lifting of such a repair pipe.

Work is carried out in the following order:

• With the help of a deep pump, all water is pumped out.
• A waterproofing solution is introduced into the main pipe (an anti-corrosion liquid can be used).
• Then, with the help of a winch, polymer pipes are lowered. The sections are threaded together as the insert moves deeper into the shaft.
• A self-made filter is arranged in the lower section of the liner. Several holes are made with a drill or perforation (a grinder is used). From above, the filter is tightly wrapped with geofabric.

Also, it is necessary to carry out garbage disposal so that your site is clean and all sanitary and hygienic standards are observed.

5 ways to get the pump out of the well

How to get a stuck pump

To quickly get rid of the problem, you need to know how to get the pump out of the well if it is stuck and does not move. For every reason there is a solution.

This is how the vibration pump can get stuck in the casing

Available methods:

Cable slack. If this situation occurs, you need to slowly and carefully lower the device. As soon as it is at the bottom, loosen the cable and try to lift again. At the same time, they move slowly, trying to avoid sagging of the electric wire and other structural elements (cable, hose).
Silting. With such a problem, it will be difficult to lift a stuck device. To correct the situation, silt deposits must first be washed out.

To do this, carefully swing the cable, in parallel trying to lift the stuck device. Gradually, the “grip” of the silt will weaken and after a few minutes of such work it will be possible to raise the equipment to the surface.
Burrow in limestone

If such a problem occurs, you should perform all the same actions as with silting. Slow rocking will gradually break up deposits near the hull and allow you to lift the device from the bottom.
Pipe damage. To get stuck equipment will help rotational movements that need to be given to its body. Lift the device slowly, as one careless movement will be enough to damage its outer part.
Foreign object stuck in the shaft. In such a situation, you need to take the help of professionals, since it will be difficult to get this item with your own hands. This is due to the risk of it falling to the bottom of the well or damaging the hull.

What needs to be done so that the pump does not get stuck

These include the following:

1. Attaching the electrical cable to the hose. This simple action will help to avoid sagging of the wire and its wrapping around the body of the pumping equipment. Fixation is carried out with the help of special clamps, which must be regularly replaced with new ones.
2. Placement of the pump above the filter. This installation option will avoid sticking to the body of silt, which often causes the device to get stuck.
3. Annual cleaning. Regular carrying out of this event will not allow silt and sand to accumulate at the bottom of the well.
4. preventive treatment. In this case, professionals recommend using citric acid to remove limescale. She will quickly deal with the problem and eliminate the possibility of the device getting stuck.
5. During the arrangement of an autonomous water supply system, only high quality pipes should be used. Due to this, there will be less risk of breakage as a result of mechanical stress.

How to get a pump that has fallen into a well

If the cable breaks and the pump falls into the well, it will be difficult to get it from the bottom. Even if you manage to do this work, you will have to change the device to a new one.

Procedure:

1. Find a rod made of any durable metal. Its size should be enough to reach the bottom.
2. A special screw nozzle is attached to one edge, which is shaped like a corkscrew with a pointed end.
3. At the second end of the rod, a rod is fixed, which allows you to rotate a home-made structure.
4. Lower the finished product and find the fallen equipment.
5. Applying force, screw the screw nozzle into the body of the device.
6. As soon as it deepens to half its length, the pump slowly begins to rise.

What needs to be done so that the pump does not fall

Lifting a pump from a well is considered a difficult undertaking, so you need to try to prevent it from falling to the bottom. To do this, you need to take several steps. Among them are:

• use the most rigid and durable cable;
• use a one-piece long hose, and not assembled from several small pieces;
• the pipe diameter should be selected in a ratio of 3:2 with the dimensions of the pump;
• install a head on the well to prevent falling objects.

This is interesting: How to seal the seams in a well of concrete rings: the whole point

What to do?

Depending on the reasons due to which the pump is stuck in the penetration, further tactics are chosen. We will tell you what to do in different situations.

How to remove the unit from the well to the sand?

If your pump is stuck in the shaft of a hydraulic structure due to clogging, then you can try to remove it yourself.To do this, the device must be swung in the penetration, pulling the cable towards you and releasing it. Such reciprocating movements should be repeated several times. This will allow the device to break out of the clogged plug at least a little, and it will be much easier to do this further, since water will be able to enter the gap formed and begin to blur the dirt even more. To prevent this from happening in the future, the well must be cleared of clogging at least once a year.

What to do if the device is stuck in a limestone well?

Although this type of hydraulic structure is not subject to siltation, like sand wells, the pump can still get stuck here. There may be other reasons for this. For example, if the unit is very deep, sediment may form around the device, which is formed due to the high content of calcium and iron salts in artesian water. These substances, when interacting with oxygen, form a coating on the body of the device and the walls of the penetration, making it difficult to remove the pumping equipment from the well.

The thing is that these are very dense deposits. Accumulating in the gap between the unit and the walls of the penetration, they block the pumping equipment in the mine. This happens if the cleaning of the hydraulic structure is carried out very rarely or not at all. In such a situation, you can do the following:

• try to swing the unit in the penetration, as described above (you can do it yourself);
• use a chemical or mechanical method (this method can only be used by specialists).

The essence of the chemical method is that the hardened precipitate is affected by special compounds for its dissolution.The mechanical method is the impact on mineral deposits with a stream of compressed air blown out under impressive pressure. This will either completely remove the sediment, or reduce its density.

What to do when the casing is deformed?

If the pump is stuck when lifting up due to bending and breakage of the casing pipes, then during the lifting, a characteristic blow and sound is heard. In this case, there can be several reasons for the deformation of casing pipes:

• a dent has formed due to the pressure of the soil;
• the pipe was deformed under the weight of the entire column;
• the junction of adjacent pipes diverged.

This is the most serious problem, as a result of which it is sometimes simply impossible to get the pump out of the well. Depending on the degree of deformation, even the smallest unit, like Malysh, cannot be removed from the deformed casing string. In this case, the only way out is to completely dismantle the column.

In simple cases, you can try to cope on your own. To do this, do the following:

First, try to gently rotate the cable.
As a result, the rotational movement will be transferred to the unit, and it will be able, successfully turning, to pass through the problem area.
If this does not help, lower the unit by loosening the cable and try to raise the unit again. Perhaps the device simply warped in the penetration.

If the unit is stuck while lifting and the previous methods do not help, you can try the following:

If the unit is stuck while lifting and the previous methods do not help, you can try the following:

1. Take a piece of pipe 1 m long. This piece should weigh more than the pumping equipment. The diameter of the pipe must be much smaller than the section of the trunk of the hydraulic structure.

At the end of this element, a hole must be made or a special eyelet can be welded.
A cable is passed through the prepared loop or hole and tied to the pipe.
To prevent the prepared product from falling into the shaft, the second end of the cable is tied to the surface near the wellhead.
Now the element must be carefully lowered into the penetration, trying to push the pump back to the bottom of the structure.
If it was possible to lower the unit in this way, now you can try to raise it to the surface again.

Methods for extracting casing pipes from wells

If there is a need for a complete dismantling of the well, then it is necessary to proceed with the appropriate work. Let's figure out how to pull the pipe out of the well with your own hands with the least financial loss. To do this, it is necessary to carefully study the situation, clarify what kind of soil we are dealing with and what condition the well is in.

There are several effective methods for extracting casing pipes from the ground:

• by stretching and extracting the entire column;
• soil washing method;
• by unrolling the entire structure.

Let's take a closer look at each of these methods.

Stretching Method for Column Extraction

This is an excellent way to recover large diameter casings. Well applicable when obtaining a bend in the wellbore. To implement the plan, it is necessary:

firmly grab the upper edge of the pipe and gradually pull it up;
all work must be done slowly and carefully, with jerks, the product may break;
the torn piece clings again using a special nozzle, the structure rises further to the next break.

With painstaking repetition of such actions, the entire structure is pulled to the surface. It is necessary to work slowly and systematically, since otherwise it will be more difficult to get the whole pipe out of the well. First you need to take care of the availability of the necessary tools. With frequent breaks, the reuse of such a design will not work.

Extraction by washing

Often, a sand plug forms around the casing pipe, which holds it and does not allow for quick extraction from the ground. How to pull the casing out of the well in this case? An excellent option would be to use water. For this you need:

• prepare the pump and special equipment for flushing;
• connect the pump outlet to the top of the pipe;
• through the pumping device, water is let into the structure, gradually increasing the pressure;
• with the help of special equipment, the wellbore is loosened and scrolled;
• as a result of the simultaneous action of water and a rotating mechanism, the friction force of the restraining structure in the soil decreases.

Thus, the casing pipes are removed. Ideally, use two pumps, namely one at the top of the structure, the second - to immerse in the mine itself to its foundation

It is important to consider that the pulling force must be exactly in the vertical plane. The upper part of the structure must be firmly fixed to the lifting mechanism. It is necessary to avoid sudden movements, which can lead to a rupture of the structure.

It is necessary to avoid sudden movements, which can lead to a rupture of the structure.

Applying the spin method

For this method of extracting the casing, you will need the following tool:

• crown for catching and fixing the upper part of the structure;
• rotary hammer;
• cumulative torpedoes.

Casing Retrieval Procedure

• the above crown and drill pipe are lowered into the mine;
• with the help of the rotor, the pipe is rotated against the rotation of the clock by about 2 tens of revolutions;
• there is a pacing of the structure gradually increasing the effort to the maximum limit;
• after that, a pipe break should occur, if it does not occur, the process is repeated;
• the result of these efforts should be incomplete untwisting of the joints of the casing parts.

If a positive result does not occur, it is necessary to use special equipment that will allow you to transfer the torsional force of the mine structure. After unscrewing a part of the structure, a vertical tension force is applied to it and it is removed to the surface. Such actions continue until the complete analysis of the structure and its extraction to the surface.

If these measures do not lead to the desired result, a cumulative torpedo is lowered to the depth of the proposed separation. As a result of its explosion, the structure breaks and the upper part rises with the help of the vertical force of special mechanisms. On the surface, damaged areas due to the explosion are cut off with a grinder. This method is considered expensive, requires special skills - it is not used in private wells.

What to do if the pump cannot be removed

If the electric pump after carrying out all the operations cannot be removed to the surface (it has come off the pressure pipeline, hose with a cable), proceed in the following ways:

Continue to use the well source.The housings of most centrifugal electric pumps are made of stainless steel, and the internal parts are made of polymers or corrosion-resistant metals. The materials are designed for the supply of drinking water, so the presence of fallen electric pumps at the bottom of the well for many years is unlikely to affect its quality.

The greatest danger to humans is oil, which is present in the mechanism of almost all pumping units; over time, it can leak out through a damaged housing. Also, stainless steel in budget models, usually of low quality, can become rusty over time, affecting the quality of drinking water.

The body of the vibrating pump is made of aluminum, which is not susceptible to corrosion, the internal parts are made of rubber and steel, and the mounting bolts are also steel - they are susceptible to corrosion over time.

The well is mothballed and a new one is being drilled. If the owner takes care of his health, the service life of the old borehole source is coming to an end, it is possible to drill a new well relatively inexpensively - in these cases, the old one is mothballed or liquidated.

Breaking the electric pump with a drill. The operation is permissible with a stuck pump in deep artesian wells with an internal steel casing with a torn pressure pipe, if the unit interferes with filling the source with water. Pushing the electric pump deeper will not work - a standard artesian has a tapering channel at the bottom.

After the destruction of the electric pump with a drill, its small parts fall into the artesian water basin through the filter pipe, which does not have a lower cap. Over time, the oil will wash out, and small parts will sink to the lime bottom.

Rice. 14 Example of pump removal with casing

Causes of a stuck pump

In order to figure out how to pull out the pump, it is necessary to consider the reasons leading to this situation. Most often they are explained by the human factor. For example, it was installed incorrectly, the well was not inspected for too long, the requirements for installing pump elements were violated, etc. The main causes of downhole equipment jamming are:

• well silting;
• damage to the walls of the well casing;
• ingress of foreign objects into the pipe;
• sagging power cable.

The main difficulty lies in the fact that sometimes it is impossible to determine exactly what happened to the pump. The gap between the pipe wall and the device itself can be literally 1-2 cm, and it is not possible to see the cause without special equipment. To determine the cause of the jam and decide how to get the pump out of the well, you need to analyze all the symptoms.

Silting at maximum depth

The device worked for several years without any problems, but it is not possible to get it. Most likely, the well silted up. This happens quite often, the reason is the downtime of the well for a long time. The water level can be at least a meter and block the device.

Location of the silted area in the well

The solution to the problem is to swing the pump with a cable

You need to act carefully so as not to aggravate the situation. You can gently pull up, and then lower

Gradually, the silt deposits will begin to erode the water, and the device can be lifted.

To get rid of such a problem, the well should be cleaned every 1-3 years.Unable to pull pump out of limestone well.

In limestone wells, normal siltation does not occur, perhaps the matter is “reverse siltation”. The reason for its appearance is that the device sank too deep, and water began to stagnate around it. As a result, sediment appears on the end and pipes, which causes blocking of movement. Moreover, the sediment is formed strong, and flushing the well will not give any result.

You can get the pump, as in the case of silting, by swinging. In this case, the device must be turned on, then the water will more successfully wash out the resulting plug. To prevent the problem from occurring in the future, it is worth paying more attention to maintaining the operation of the well, as well as correctly placing the pump in it.

Jamming when lifting

While lifting, the pump is stuck in the well and does not move despite all efforts. This is the most common cause of pumping equipment jamming in a pipe. Most likely, such "symptoms" mean that the cable wrapped around is sagging.

This problem is much easier to deal with than others. The stuck device must be lowered and the cable loosened. After that, pull out the pump again, trying to prevent the cable and cable from sagging again. In no case should you pull with all your might - the cable can break, and then it will be very problematic to get the equipment.

The scheme of fastening the pump to the casing to prevent sagging

To prevent the cable from sagging, it can be attached to a pipe or hose even at the stage of installation of the pumping system. For this, special clamps are used. It is not worth attaching a cable to the cable - when the cable is pulled, the clamps can fly off.Before lifting, they will have to be removed, and then replaced with new ones. But this simple measure will avoid problems with lifting a stuck pump.

The reason is a broken pipe. Perhaps a dent has formed, the edge has flattened, the joint has parted. Burrs formed due to poor-quality welding of the seam can interfere with movement. Before removing the stuck pump from the well, it is given a rotational motion.

In some cases, this can help - the device will pass by the damaged area, although there are no guarantees. Perhaps the result will be one-time, but there is a chance that this will help solve the problem. The pump stuck sharply when lifting approximately in the middle.

The reason may be that a tool or a small object (for example, a small pebble) has entered the well and blocked the movement. Stopping the movement of downhole equipment occurs precisely at the moment when a solid object gets between the wall and the pump.

Jamming intervals may vary - it depends on which cable selection is installed, while the device drops down without interference.

You cannot cope with such a problem on your own; you need to call a team of specialists for help. Using the right equipment, only specialists can pull out the part that causes jamming.

How to pull a pipe out of a well - some options for solving the problem

Drilling a well for water is a rather complicated and time-consuming task in itself. But even bigger problems await the site owners if the device needs to be dismantled. The most difficult of the questions that arise in this regard is how to pull the pipe out of the well?

What is the problem?

A water well is similar to an ordinary well, the diameter of which is small, but the depth can reach several tens of meters. To protect the walls of the well from the quite possible collapse of the soil, a casing pipe is driven into them.

And to keep the water clean and fresh, another one is inserted into the casing pipe - the operational one. Of course, the diameter of the production pipe should be somewhat smaller than that of the casing.

Often, in order to save money, pipes are used that can simultaneously perform both functions: to strengthen the soil and be in contact with drinking water.

Well pipes are made of various materials:

• steel: the most durable, durable and expensive;
• asbestos-cement: rather fragile, but quite high-quality and relatively cheap;
• plastic: a novelty on the market that is stronger than asbestos-cement products, has a low weight and is cheaper than steel.

Please note: To remove fragile asbestos-cement pipes from the well without damaging them, the task is almost impossible. Pulling the pipe is sometimes more difficult than re-drilling the well.

Pulling the pipe is sometimes more difficult than re-drilling the well.

In order to remove a narrow pipe from a well, from a sufficiently large depth, considerable effort and skill will be required. In this case, it is necessary to take into account:

• the material from which the pipe is made;
• immersion depth;
• lifetime;
• Terms of Use;
• reasons for dismantling.

In some cases, it is not possible to successfully solve the problem of dismantling, for example, when the structure breaks at a great depth.

Possible Alternatives

A specialist who is approached with a question about how to get a pipe from a well will definitely ask a counter question: why? Some owners of private houses think that this is the only way to restore the work of an old, abandoned or improperly arranged well. Sometimes the desire to dismantle the pipe is dictated by the need to repair or replace a failed structure.

Since the dismantling process is laborious, troublesome, long and expensive, you should definitely look for alternative solutions. For example, a smaller diameter production structure can be hammered into a damaged casing. The fracture will be securely closed and the well will be restored.

It can be useful to consult with experienced professionals. Sometimes it is enough to properly clean the well and dismantling is simply not needed.

In some cases, it turns out that it is cheaper and easier to drill a new well than to restore an old one.

How to remove a pipe from a well?

If the decision to pull out the pipe is nevertheless made, one of several possible methods can be used to do this.

• Contact professional drillers. They use special equipment (pipe cutters, overshots, taps, etc.), saving the owners of the site a headache and some money.
• Fix the end of the pipe, for example, with a loop or a crimp collar, fasten it to the short arm of the large lever and gradually remove the pipe.

Tip: It may take several people and time to act on the long arm of the lever. There is a known case when a team pulled out a pipe, sitting on the long arm of the lever for half an hour.

Instead of a lever, you can use a suitable jack, for example, from KAMAZ or a railway one.

Alternatively, you can get the pipe out of the well using a large railway jack.

Such a homemade device

Another way to remove the pipe is to make a special tool.

To do this, you need channel No. 10, from which two racks are made in the form of an inverted letter "T". The height of the structure should be one meter, and the width should be 0.6 m. A bearing is welded on top of each rack, the inner diameter is 40 mm.

Now you need to make an axis on which the handles and the drum are fixed. The edges of the axis are inserted into the bearings and the device can be considered ready.

For lifting, the pipe is fixed with a steel cable, which is wound on a drum. To insure long structures, it is recommended to use a special chock to hold the pipe when intercepting the cable.

To pull out the plastic pipe and not damage it, you will need a crimp clamp.

Reason 2: Sagging water hose

Pumping water from the well was carried out using a reinforced watering hose connected to a submersible pump. When lifting the pumping device by the cable, it was found that the ties connecting the electric cable and the hose were displaced (or they were not there), releasing a long (more than one and a half meters) section of the cable and hose. Moreover, the selection of the cable length at the time of pump stalling is greater than that of the hose. Accordingly, the hose sagged between the casing and the casing of the pump unit, blocking its rise.

The situation is complicated, since there is no water column made of HDPE pipes connected to the pump - it will not work to push the device deep into the well.And the hose clamped between the walls of the pump and the casing string is twisted and filled with water, which increases its volume (water is an incompressible liquid).

If the depth to the blocked pump is less than two meters, then you can try to push the device down with a wooden pole, securely fixing the horseshoe-shaped support nozzle on it. It is necessary to bring a pole with a “horseshoe” to the upper end of the device, guided by the cable holding the pump, set the pole vertically and try to move the water pump down with jerks

In the process, it is important to hold the hose and cable, not allowing them to sag, much less fall into the well

If the pump is stuck due to the hose at a greater depth, it cannot be removed by yourself. Attempts to push the pumping device out with a multi-meter self-made column dramatically increase the risk of cable and hose breaks, which will only worsen the situation. Requires the involvement of professionals with special equipment.

Preparation for the dismantling of the wellbore

Knowing about the possible difficulties, you should prepare thoroughly for the process.

The first step is to determine the weight of the product, for which:

• measure the depth of the well, the diameter of the pipe, the wall thickness;
• open the directory and, focusing on the diameter and thickness of the walls, find the weight of 1 linear meter. m;
• the found value is multiplied by the depth of the shaft and the desired mass of the pipe is obtained.

This value will be the base when choosing a winch for tractive force. If the figure turned out to be solid and there is no winch with such a pulling force, then the only option is to order a crane. When deviations from the calculated value are insignificant, a conventional winch will do.

When is casing removal necessary?

There are mainly 3 reasons for dismantling the casing from the well:

1. There was a depressurization of the wellbore, which happens due to poor-quality connection of the casing string or corrosion of the pipes.
2. A tool or equipment is hopelessly stuck in the barrel, making it impossible to remove the old pump and install a new one.
3. A change in the design of the tubular well is required: deepening, filter transformation, etc.

The remaining cases are not a reason to extract the construct. Sometimes you can save the situation by installing a polymer liner of a suitable diameter. If the break occurred at a great depth, dismantling is simply impossible. Then it is easier to drill a new source than to spend big money on restoring the old one.

Why is demolition necessary?

Among the most common reasons for repairing wells and removing casing pipes, it is worth listing the following:

• decrease in the productivity of a hydraulic structure;
• deterioration of water quality up to its complete unsuitability for drinking;
• breakdown of pumping equipment and other units;
• well clogging.

Dismantling of casing pipes is not always the only way out of the situation. If the pipe is damaged, a smaller diameter operational product can be inserted into it. It isolates the place of damage, and the structure can be operated further.

If the walls of the well are not damaged, and you just need to clean the pipes, then it is not necessary to dismantle them. In some cases, it may not be practical to extract the casing string at all. Much easier to build a new well.