Equipment for cleaning liquid purification during well boring

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production can be used during wells boring for cleaning liquid purification. Equipment includes primary and fine purification units, pump for liquid supply into units, tanks for sludge and liquid collection. Primary purification unit includes two pipe one inside of another. External pipe inclined in 30°. Top right part of external pipe has a nozzle with possibility of tangential solution supply to the internal pipe. Along external pipe executed inside hole covered with net, for fine dispersed liquid passing by and tank for it collection. In inside pipe of smaller diametre installed a screw auger for taking out sludge form pipes bottom end and its withdrawal into bunker. Fine purification unit include big diametre inclined at the same angle as the external primary purification pipe, installed in it at one end second pipe of a smaller diametre and smaller dimension for purified liquid withdrawal into tank, located at first pipe bottom nozzle, installed on tangential in correspondence to the second pipe fitting for solution supply. On the part of the first pipe there is a short square thread with possibility hard particles withdrawal out of overall flow to the auger.

EFFECT: cleaning liquid purification quality increase, secure equipment operation.

5 dwg

 

The invention relates to the mining industry and can be used in drilling wells for clean drilling fluid.

Known purification system of the drilling fluid (RF patent No. 2030546, EV 21/06, 1995), containing the reservoirs with the separation compartment, the United gutter system, shale shakers with tray, with the separation pipe, gate valves, connecting shakers with manifold, consistently set the pit, the hydrocarbon gas detection, degasser, mud pumps and trays, provided with an additional gate and an additional shaker with tray, individual drive and a grid with cell size of 1.5×1.5 mm and not less than 1.0 mm, the main screen has a cell size smaller than the size of the cells for more shakers, the level of the bottom of the pan additional vibrating screens placed below the level of the drain with sump major shale shakers in a container, pallet additional shakers has a plum on the main shakers, and the additional gate is placed in the separation pipe and connects additional vibrating screen with manifold.

With the increasing quality requirements for drilling wells grow and requirements for drilling fluids to the degree of cleaning, the cleaning system today are not able to provide quality cleaning drilling fluids necessary to the ima density of 1.08-1.10 g/cm 3), to stabilize their parameters while drilling.

In the scheme there is no equipment for fine cleaning of drilling fluids - centrifuge, there is no training going well drilling mud cleaning - dilution cleaned, there is no circular circulation system, insufficient power of the second, third stage separation of rock particles less than 0.03 mm, there are large losses of drilling fluids, to align them - rectification.

Known device for cleaning liquid, comprising coarse cleaning with capacity for purified solution, site fine purification, consisting of a series of established sand and hydrocyclone GZ with containers for the purified solution, inlet and outlet pipes and slurry pipe treatment unit, peredachny chute and a bypass connecting capacity with peredachny chute located above the tank for the purified solution and overflow outlets, the top part associated with the output pipelines treatment unit, and the lower drawers for purified solution, and in the overflow funnel, indicating the hydrocarbon gas detection with capacity for purified solution and in the bypass pipe installed check valves, and the upper edge of each subsequent overflow funnel located below the previous one, but in the higher exit peritoneo gutters. Installation is also equipped with a sludge capacity, divided drain partition with vibroplita on cumulative camera and camera collecting purified liquid, and the collection chamber in the upper part is connected with the slurry pipe treatment unit, and the bottom has an outlet with the mechanism of selection of cuttings, for example, unloading auger, and the camera is collecting the purified liquid is connected by hydroline with capacity for purified solution of the coarse cleaning (see SU # 1182150 And class. EW 21/06).

Disadvantages of using a cleaning fluid. With the increasing quality requirements for drilling wells grow and requirements for drilling fluids to the extent of their treatment. This treatment systems today are not able to provide quality cleaning of drilling mud to the desired density of 1.08-1.10 g/cm3), to stabilize their parameters while drilling. In the cleaning device of the first stage is provided by the vibrating screen, which, as practice shows, is the weak link because of the rapid breakdown, and therefore, there is a need for frequent repairs node. A significant drawback of the considered units for cleaning is the use of check valves, which are unstable in solutions with a high content of mechanical impurities. You should pay attention also is and the complexity of this installation, which significantly increases the cost of posting wells that will result in growth failure nodes, especially in the winter.

The technical objective of this invention is to improve the quality of cleaning washing liquid, ensuring stable operation of the equipment.

This is achieved by apparatus for cleaning drilling fluid containing the nodes of the coarse and fine cleaning, a pump for supplying fluid to the nodes, containers for collection of sludge and liquid according to the invention, the coarse node is equipped with two inserted one into each of the tubes, while the outer pipe is inclined at an angle of 30°in the upper right part of the outer tube is a nozzle with a possibility of solution tangentially to the inner pipe along the outer pipe cut a rectangular hole, closed mesh for the passage of fine liquid in the tank, and into the inner tube of smaller diameter set screw screw for engagement of the lower end of the pipe sludge and discharge it into the hopper, and the site fine cleaning includes a pipe of larger diameter, inclined at the same angle as the outer pipe for rough cleaning, inserted at one end of a second tube of smaller diameter and smaller for discharge of treated liquid in a tank located in the bottom of the first pipe nozzle installed on tangential to the is of the second inlet pipe for the supply of the solution, in the first part of the tube is shorter belt thread with the possibility of removal of solid particles from the total fluid flow to the screw that is installed inside the first tube, to display them in the bunker.

The invention is illustrated by drawings, where figure 1 presents a host of coarse, figure 2 - section of a coarse node, 3 - node thin clearing, figs.4 - incision site fine cleaning, figure 5 - view of the tape thread.

Coarse cleaning consists of a tube 1, an adjustable nozzle 2, the velocity of the incoming flow which can be changed depending on the intensity of the removal of cuttings from the well, the inner pipe 3 of smaller diameter with screw. The pipe 3 is inserted into the pipe 1. Outer tube 1 is inclined to the horizon at an angle of 30°. In the upper right part of the outer tube 1 has a nozzle 2, the velocity of the incoming flow which can be changed depending on the intensity of the removal of cuttings from the borehole. Along the above pipe cut a rectangular hole, closed mesh 4, for the passage of fine-dispersed liquid. On the outer side of the pipe 1, on the contrary mesh welded small rectangular box 5, where flows of fine-dispersed liquid. Near the pipe 1 is a collection of solution 6. Drilled the solution from the well enters the outer tube 1 via line 7. Separately from the pipe 1 is a hopper 8 for collection to the total particles. The auger is driven by the actuator 9. To flush grid 4 in the box 5 is installed pipe with nozzle 10.

Coarse cleaning works as follows. The liquid flow from the mouth of the drilling rig from a height of 2-3 m into the pipe 7 through the nozzle 2 in the upper right part of the pipe 1 at a tangent. Rotating inside the tube 1, the liquid moves to the left down. In this part of the liquid fine particles for each turn passes through the grid 4 in the box 5. Repeatedly passing along the grid, all the liquid goes into the duct 5. A large fraction of drilling cuttings, not passing through the grid 4 and rotating in the pipe 1 are omitted in its lower part under the weight of its weight.

Mounted within the inner tube 3 auger captures a large fraction of the lower end of the pipe and transports them to the top, and drops into the hopper 8. Liquid fine particles passed through the sieve 4 is adhered on the frame 5 to the left down and falls by gravity into the collection solution 6, where the content is served slurry pump site fine cleaning solution. The grid 4 is periodically washed with liquid, served briefly drilling pump through the pipe 10 with the nozzle.

Site fine cleaning consists of a tube 11, a larger diameter inclined at the same angle as the outer pipe for rough cleaning, installed adjustable nozzle 12, is inserted wasauksing pipe pipe 13 of a smaller diameter and smaller and rigidly connected with the lower part of the bottom. At a small distance from the upper end of the tube 13 on the inner surface of the pipe 11 is made shorter belt thread (see figure 3 points from a to B)having a small depth and a big step. At the other end of the pipe 11 of the tape threading set screw 14 for removal of solid particles and bring them into the hopper 16. The solution from the coarse node to the node in the fine purification is fed through the pipe 15.

Site fine cleaning rationally have over the coarse cleaning, and it works as follows.

The fluid injected slurry pump for tangential to the pipe 15 through an adjustable nozzle 12, entering the gap between the tubes 11 and 13 at a certain speed, performs a circular translational motion, which contributes to the stratification of the fluid flow and the moving of particles density, which improves the quality of cleaning. During the rotation of the liquid to seek the inner wall of the tube 11, forming the centerline of the pipe emptiness, while it continues to move along the walls in the form of a layer of a certain thickness right up. The flow of fluid up quickly fades out, reaching point a, because it inhibits a component of the force of gravity is directed along the pipe. Having lost his speed under the action of its gravity, the purified liquid flows through the inner pipe 13 into the tank (not shown).

Small solid particles, acquiring the I when rotating more acceleration than the liquid, continue to move further along the pipe 11 and, once in a band thread, continue to rotate in a predetermined path of the thread and try to exit the pipe 11. Reached point B picks up small particles rotating screw 14, which makes them out into the hopper 16.

Changing the size of the nozzle 12 through which the fluid enters the pipe 11, it is possible to change the speed of rotation of the fluid, therefore, the purity of her purification. Periodically, the hopper 16 is unloaded in the car and disposed of in accordance with environmental and safety requirements.

Each node is compact and easy to transport because they are technologically not rigidly connected.

The application of the present invention will allow the following:

to increase the reliability of all equipment, as there is no vibration mechanisms;

- to reduce metal consumption;

to reduce the time spent on the repair of power equipment;

to reduce the costs associated with addressing environmental problems;

- to promote a culture of drilling.

The present invention will find wide application in the oil industry, drilling wells for oil and gas.

Apparatus for cleaning drilling fluid during the drilling of wells containing the nodes of the coarse and fine cleaning, a pump for supplying fluid to the nodes, containers for collection of sludge and liquid, characterized in that the green coarse equipped with two inserted into each other by pipes, this outer tube is inclined at an angle of 30°in the upper right part of the outer tube is a nozzle with a possibility of solution tangentially to the inner pipe along the outer pipe cut a rectangular hole, closed mesh for the passage of fine liquid in the tank, and into the inner tube of smaller diameter set screw screw for engagement of the lower end of the pipe sludge and discharge it into the hopper, and the site fine cleaning includes a large diameter pipe, inclined at the same angle as the outer pipe for rough cleaning, inserted at one end of a second pipe of smaller diameter and smaller for discharge of treated liquid in a tank located in the bottom of the first pipe nozzle, mounted on a tangential with respect to the second pipe branch pipe for supplying a solution to the first part of the tube is shorter belt thread with the possibility of removal of solid particles from the total fluid flow to the screw that is installed inside the first tube, to display them in the hopper.



 

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1 dwg

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