31results about How to "Avoid interlayer interference" patented technology

The embodiment of the invention discloses a longitudinally superposed developing three-strata oil reservoir well pattern and a deployment method of the longitudinally superposed developing three-strata oil reservoir well pattern. To the longitudinally superposed developing three-strata oil reservoir, the well spacing of a basic well pattern is 2*(square root of 2)*L; after being encrypted once, the well spacing of a middle transitional well pattern is 2L; after being encrypted twice, two superposed inverted nine-spot well patterns with well spacing of 2L are formed; after being encrypted for three times, two superposed inverted nine-spot well patterns with well spacing of 2L and one superposed inverted nine-spot well pattern with well spacing of (square root of 2)*L are formed; and after pairwise alternatively development, the well spacing of the plane well pattern of each strata has a rational well spacing of L; the evolution process of the well spacing is as follows: 2*(square root of 2)* L to 2L to (square root of 2)*L to L; the middle process of well patterns conversion with a well spacing of 2L and (square root of 2)*L is added; at the same drilling speed, well placement uniformity coefficient and reserve control speed are increased; the well spacing is encrypted in the alternation of well patterns; each well pattern can realize order development to each longitudinal strata; the utilization ratio of the well patterns is improved; meanwhile, the oil reservoir is uniformly used, so that the method is in favor of increasing accumulated oil production of an oil field and improving the recovery ratio; and interlayer interference generated by commingled extracting oil in multiple oil layers of longitudinal series of strata is avoided.

The embodiment of the invention discloses a longitudinally superposed developing two-strata oil reservoir well pattern, and an arrangement method of the two-strata oil reservoir well pattern. The method comprises the following steps: firstly determining the longitudinal development strata of the oil reservoir and the rational well distance, and determining the well spacing of a basic well pattern and the well spacing of a middle transitional well pattern according to the longitudinal development layer coefficient. According to the longitudinally superposed developing two-strata oil reservoir, the well spacing of the basic well pattern is 2L, after being encrypted once, the well spacing of a middle transitional well pattern is square root of 2 times L; after being encrypted twice, two superposed well patterns with a well spacing of square root of 2 times L are formed; the well spacing of the superposed well pattern after alternative strata development is L; the evolution process of the well spacing is as follows: 2L to 2 times square root of 2 L to L; the conversion middle process of a well pattern with a well spacing of square root of 2 times L; in the same drilling speed, well placement uniformity coefficient and reserve control speed are increased; the well spacing is encrypted in the alternation of well patterns; each well pattern can realize order development to each strata; the utilization ratio of the well patterns is improved; and meanwhile, the oil reservoir is uniformly used, so that the method is in favor of increasing accumulated oil production of an oil field and improving the recovery ratio; and interlayer interference generated by extracting oil in multiple oil layers of longitudinal series of strata is avoided.

The invention discloses a cognition-based macro eNB and femtocell interference management method. A chance interference avoidance method and a Gale-Shapley frequency spectrum sharing method are combined. In the chance interference avoidance method, a femtocell acquires free frequency spectrum resources in a macro eNB network or available time-frequency resource blocks in orthogonal frequency division multiplexing through detection. In the G-S frequency spectrum sharing method, a one-to-one frequency spectrum resource distribution strategy is adopted in the femtocell, communication is carried out through obtained frequency spectrum resource holes, in the communication process, the femtocell periodically monitors the occupancy state of the frequency spectrum resources, and once a macro eNB user occupies frequency spectrum resource blocks, the femtocell stops communication. Compared with existing partial frequency spectrum resource sharing schemes, the method has many advantages, for example, the existing schemes are low in spectrum efficiency and cannot eliminate in-layer interference, the method of detecting macro eNB behaviors is adopted in the scheme, more resources can be sensed, and the spectrum efficiency is high; meanwhile, the in-layer interference is eliminated by combining the G-S theory.

The invention relates to a vertical-well double-layer partial-pressure commingling method and device for coalbed methane. The method includes the steps that a pipe is arranged in the well, and three isolated channels including the first channel, the second channel and the third channel are arranged in the pipe; the side wall of the first channel and the side wall of the second channel are communicated with two coal beds respectively, gas of the two coal beds is discharged to a well opening through the first channel and the second channel respectively, liquid of the two coal beds flows to the bottom of the first channel and the bottom of the second channel respectively, and gas-liquid separation is achieved in the well; one-way valves are arranged between the first channel and the second channel and between the second channel and the third channel, and the liquid of the two coal beds is jointly drawn out of the well while accumulated liquid in the well bottom is avoided. According to the method and device, the gas and the water generated by the upper coal bed and the lower coal bed are jointly mined and jointly drawn through the single well, gas-liquid separation is carried out at the well bottom, the gas is drawn through a gas path, the liquid is drawn through a liquid path, pressure systems of the two coal beds are separated, interlayer interference generated during exploitation is reduced, and the gas yield is effectively increased.

An insulation ageing test device of frequency conversion high voltage pulse equipment is prepared as connecting output end of pulse generator to primary edge of high voltage boosting transformer with its secondary edge being connected to wire in insulation sleeve, applying 300H2 to lkH2, 1kH2 to 5kH2 , 5kH2 to 10k H2 and 10k H2 to 20k H2 as operation frequency of high voltage boosting transformer alternately, connecting said boosting transformer to output of pulse generator for outputting square wave to meet requirements of insulation ageing test.

The invention discloses a downhole intelligent controlling type expansion packer. The downhole intelligent controlling type expansion packer comprises an upper joint and a lower joint; an intelligent controlling plate (15) is fixedly connected to the upper joint; an inner cavity pressure gauge (47), a sealing pressure gauge (54) and an in-pipe pressure gauge (55) which are connected with the intelligent controlling plate (15) are arranged on one side of a sealing main body (33); an electric switch is arranged in the sealing main body (33) and controls liquid inlet and liquid outlet of an inner cavity of a rubber barrel, steel pipe cables penetrate through a packer body, and locking and sealing mechanisms are arranged on the two extended ends of the steel pipe cables. According to the downhole intelligent controlling type expansion packer, the self power supply and data transmission problems are solved by utilizing the penetrating cables, a ground controlling system can control the packer to be set and unset and collect and upload data of the inner cavity, stratum and in-pipe pressure in time, the examining seal procedure of the packer is simplified, the accuracy of other downhole parameter admission is improved, fluid migration preventing pressure difference between layers during stopping injection is raised to over 15MPa, interlayer interference in an oil producing well is solved, and occurrence of downhole accidents is reduced.

Dual cavity type oil well pump is composed of upper suction valve, upper delivery valve, plunger pump barrel, small plunger, upper connecting tube, delivery valve joint, lower delivery valve, suction valve joint, and lower suction valve etc. When plunger pump barrel goes up, crude oil in one layer from lower delivery valve enters into chamber between lengthen tube and upper connecting tube, and crude oil in another layer from inlet tube connected to small screw below delivery valve joint enters into inner chamber of plunger pump barrel. When plunger pump barrel goes down, crude oil in one chamber is drained into annular space between outer tube and lengthen tube, and crude oil in another chamber is drained into upper part of delivery valve. Thus, oil in two layers is sucked respectively to make oil well reach maximum output.

The invention relates to the technical field of oil production engineering, and belongs to a gas well storage type integrated layered production allocation pressure gauge, which solves the problem in the prior art that long-term pressure monitoring and productivity allocation during a dynamic production process of two gas producing zones cannot be realized at the same time. The gas well storage type integrated layering and production allocating pressure gauge is formed by a salvaging connector (1), a positioning main body (2), anti-rotation pins (3), positioning scissors (4), torsion springs (5), scissor pins (6), regulating sleeves (7), a pressing cap (8), an air faucet (9), regulating rings (10), sealing packings (11), pressing rings (12), a production allocation main body (13), a sensor (14), a back-up nut (15) and a pressure gauge cabin (16). The gas well storage type integrated layered production allocation pressure gauge disclosed by the invention has the advantages that the structure is simple and reliable, static and dynamic production of two kinds of gas producing zones and long-term monitoring on pressure in a shaft can be realized at the same time, and the like.

The invention concerns an oil gas water dynamic logging method adapted for low mineralized stratum. It adopts neutron lifetime well logger to record the state of oil well stratum exploitation, oil extraction by the producing well and remaining oil distribution. The steps are: a. recording the neutron lifetime curve of oil well without injecting the thermal absorption agent by neutron lifetime well logger b. injecting gadolinium solution to the oil well then sealing the canister to pressurize for not less than 30 to 60 minutes c. recording neutron lifetime curve The invention has large neutrino capture cross-section accurate practical data, and small used dosage. It can provide basis for searching the water producer, finding out pending container rock, solving the interlayer interference and increasing the production, it can also provides the basic data for the multi -well remaining oil evaluation.

Disclosed is a layering process pipe string. In order to overcome the shortcoming that an existing oil well with serious interlayer interference enables oil production not to be smoothly carried out, and an existing separate production technology cannot meet the production needs, a packer I, a safety joint I, a screen pipe I, a sealing working cylinder I, a safety joint II, a packer II, a safety joint III, a sealing working cylinder II, a screen pipe II and a pipe plug are sequentially and fixedly connected from top to bottom through oil pipes; the packer I is arranged above an upper oil layer, and the packer II is arranged between the upper oil layer and a lower oil layer; the screen pipe I is arranged on the upper oil layer, and the screen pipe II is arranged on the lower oil layer; and the inner diameter of the sealing working cylinder I and the inner diameter of the sealing working cylinder II are smaller than the inner diameter of the oil pipes. The layering process pipe string has the beneficial effects that the structural design is reasonable, the pipe string is matched with lifting pipe strings of different types so as to avoid interlayer interference, and per-well production and the production limitation are effectively improved.

Disclosed is a separate-layer sand blocking simultaneous production pipe string. In order to overcome the shortcoming that due to phenomena of sand jamming, sand blocking and sand burying of an existing oil well with the serious interlayer interference, oil production cannot be smoothly carried out, an upper packer, a safety joint I, a screen pipe I, a safety joint II, a lower packer, a safety joint III, a screen pipe II and a screwed plug of the separate-layer pipe string are sequentially and fixedly connected from top to bottom through oil pipes, and an upper sealing working cylinder is fixedly arranged between the screen pipe I and the safety joint II of the separate-layer pipe string. A lower sealing working cylinder is fixedly arranged between the safety joint III and the screen pipe II, and the inner diameter of the upper sealing working cylinder and the inner diameter of the lower sealing working cylinder are smaller than the inner diameter of the oil pipes. A hollow sealing pipe is fixedly arranged at the lower end of a separate-layer oil production pump of a lifting pipe string, and the lower end of the hollow sealing pipe is always matched with an inner hole of the upper sealing working cylinder. An annulus is formed between the hollow sealing pipe and an inner hole, above the upper sealing working cylinder, of the separate-layer pipe string. The separate-layer sand blocking simultaneous production pipe string has the beneficial effects of being reasonable in structural design, and capable of avoiding the interlayer interference, and effectively improving per-well production and production aging of a sandy well.