Anticorrosion sucker rod

The utility model provides an anticorrosion sucker rod, including connect, the body of rod, connect and forge integrative with the body of rod, have the external screw thread on the joint, wrap up in the plastics anticorrosive coating that covers the high density polythene and make on the body of rod, go up surfacing anti -corrosion of metal layer except that the screw thread connecting, on the joint except that the screw thread surfacing anti -corrosion of metal layer, wrap up in the plastics anticorrosive coating that covers the high density polythene and make on the body of rod, the messenger the utility model discloses a surface does not contact with well liquid behind the last coupling of threaded connection, the incorruptible sucker rod of well liquid, consequently, the utility model discloses can prolong rod string's life, extension oil well production cycle reduces oil well workover, improves the economic benefits of pumpingh well.

Blowout control feedback oil -well pump

The utility model provides a blowout control feedback oil -well pump, it is connected with lower pump barrel to go up the pump barrel, the dump valve, the inlet valve, the plunger connects gradually down, an export is provided on the inlet valve, the import, it is supporting sealed with last pump barrel to go up the plunger, the plunger is with the pump barrel is supporting sealed down, the pump of going up the pump barrel directly is greater than the pump footpath of pump barrel down, the diameter of corresponding last plunger is greater than the diameter of plunger down, the pump barrel becomes toroidal cavity with the lower prop stopper on the messenger, well liquid passes through plunger down, the inlet valve, the export enters in the toroidal cavity, again by toroidal cavity through the import, the dump valve is upwards removed, the blowout control seat is installed to the lower part of pump barrel down, the lower part installation turnover panel of blowout control seat, the turnover ...

Pure P-wave anisotropic wave field simulation method

The invention provides a pure P-wave anisotropic wave field simulation method and belongs to the field of seismic wave migration in seismic wave exploration. The method comprises the following steps: reading a velocity model and anisotropic parameters including Thomsen parameter epsilon, Thomsen parameter delta and anisotropic dip angle beta in an anisotropic model, and then using the following formula to obtain the SV wave velocity: Vsv=Vp*(epsilon-delta)/C, wherein Vsv is the SV wave velocity, Vp is the P wave velocity, * is a product sign, and C is a constant; (2) multiplying the SV wave velocity obtained in step (1) by a constant to obtain a new shear wave velocity; (3) reading seismic data, inputting the new shear wave velocity obtained in step (2) and then using a finite difference method to realize wave field simulation of seismic waves in an anisotropic medium to obtain a wave field simulation result; and (4) using the wave field simulation result in step (3) to realize reverse-time ...

INSERTION-TYPE DEAD TIME TESTER READ-OUT DIRECTLY AT SITE

This invention discloses an important tool for determining the exact time of death of a person in forensic medicine. In addition to the main functions of traditional electric ion meter, it has an amplifier which uses an insertion-type sensor to directly convert the electric potential value representing the K ion concentration in the body fluid of corpse into a time value. The tester can measure high-temp (26-30 deg. C), ordinary-temp (5-25 deg. C), short-term (10-14 hours), or metaphase or long-term dead time (indicated by three divisions). It features small size and good portability, and can be used for both ion concentration analysis and dead time test in room or for determination of dead time outside field.

Mating and spawning device for noctuidae insects

The utility model discloses a mating and spawning device for noctuidae insects. The device comprises a box body and a supporting plate, the box body is fixed to the upper side wall of the supporting plate. A cover plate is arranged on the box body; two ventilation openings are formed in the side wall of the box body in a penetrating mode. Filter screens are arranged in the two ventilation openings; a plurality of plants are planted at the inner bottom of the box body; a heating mechanism is arranged on the cover plate in a penetrating manner; a plurality of incandescent lamps are arranged on the side wall of the bottom of the cover plate, a walking mechanism is arranged on the side wall of the bottom of the supporting plate, a transparent glass window is arranged on the side wall of the box body in a penetrating mode, a soil layer is arranged at the inner bottom of the box body, a plurality of plants are planted in the soil layer, and the heating mechanism comprises a heating machine fixed ...

INSERTION-TYPE DEAD TIME TESTER READING OUT DIRECTLY AT SITE

Application of meta-diketone compound containing phenylhydrazine in blue-green algae growth inhibition

The invention relates to application of a meta-diketone compound containing phenylhydrazine in blue-green algae growth inhibition. The structure of the meta-diketone compound containing phenylhydrazine is represented as a general formula I shown in the specification; in the general formula I, R1 represents hydroxyl, R2, R3 and R4 represent hydrogen, nitryl, carboxyl or sulfonyl; the substituents represented by the R2, R3 and R4 are the same or different; R5 and R6 represent methyl, trifluoromethyl or ethoxyl, and the substituents represented by the R5 and R6 are the same or different. The meta-diketone compound containing phenylhydrazine with the structure of the general formula I has good inhibition effect on blue-green algae fructose-1,6-bisphosphate aldolase, and can be used for inhibiting the activity of the blue-green algae fructose-1,6-bisphosphate aldolase; the compound has the good inhibition effect on the blue-green algae and can be used as the effective ingredient of an algicide ...

Actuating lever is right to screw pump wax control

The utility model provides an actuating lever is right to screw pump wax control, comprises a pole body, the body is right to the spiral, strong magnetosheath, there is the pole head at the both ends of the body of rod, the pole is overhead threaded, strong magnetosheath comprises the semicircular cylinder that the two structure is the same, the whole drum of synthetic one on the body of rod is detained to the two semicircular cylinder, right the body at the outside hot -cast spiral of strong magnetosheath, the body is right with the whole parcels of strong magnetosheath to the spiral, two helical symmetry that the spiral was right on the body distribute, revolving to being dextrorotation of spiral, the strong magnetosheath that the spiral was right in the body can be avoided and slow down network form wax crystalline form one -tenth, thereby it is taken away in the oil stream to make the wax crystalline substance be state in small, broken bits suspension, the will not is the wax deposition ...

Phenylhydrazine fork-containing meta-dicarbonyl compound, preparation method and application thereof in inhibiting growth activity of candida albicans

The invention relates to a phenylhydrazine fork-containing meta-dicarbonyl compound, a preparation method and an application thereof in inhibiting growth activity of candida albicans. The phenylhydrazine fork-containing meta-dicarbonyl compound is characterized by comprising a structure shown by a general formula I in the description, wherein in the general formula I, R1 represents hydroxyl, R2, R3 and R4 represent hydrogen, nitryl and carboxyl or sulfonic acid group; the substituent groups represented by R2, R3 and R4 are same or different; R5 and R6 represent methyl, trifluoromethyl or oxethyl; and substituent groups represented by R5 and R6 are same or different. The phenylhydrazine fork-containing meta-dicarbonyl compound has a good effect of inhibiting fructose-1,6-diphosphate aldolase of candida albicans, and the minimum IC50 value of the compound can reach 0.22 micron; and the phenylhydrazine fork-containing meta-dicarbonyl compound has a good effect of inhibiting the candida albicans ...