The invention discloses a direction adjustment system for a horizontal coring drilling machine. The direction adjustment system includes at least three hydraulic winches and hydraulic direction adjustment loops which are connected with hydraulic motors of the hydraulic winches in one-to-one correspondence, wherein steel wire ropes of the hydraulic winches are connected with outer sleeves of the horizontal coring drilling machine, and the steel wire ropes and fixed points of the outer sleeves are arranged non-collinearly; the hydraulic direction adjustment loops are used for controlling the oilpressure of working ports of the hydraulic motors to adjust tension of the steel wire ropes; and a drill pipe is subjected to force at different application points, through combination of different tension of the steel wire ropes, the space positions of the fixed points are changed, thus the axis direction of the drill pipe, namely the drilling direction of the horizontal coring drilling machineduring drilling is changed, the purpose of adjusting the drilling direction of the horizontal coring drilling machine is achieved, and the working condition of the hydraulic winches adjusting the drilling direction is achieved. The invention further discloses the horizontal coring drilling machine including the direction adjustment system for the horizontal coring drilling machine.

Horizontal coring drilling machine and direction adjustment system thereof

The invention discloses a drilling finish method for a continuous shale reservoir. The drilling process of the shale gas reservoir drilling finish is protected, the method is particularly suitable forthe reservoir with a shale rock layer of a large deposition thickness and a complete set of continuous shale lithology, the invention provides a set of highly feasible engineering construction methods with remarkable effects, the use of an expensive drilling fluid system is not needed, only from the point of view of engineering, the naked hole section of a shale layer section is fully trimmed andstandardized, especially a well section corresponding to the shale layer section and the junctions of upper and lower sides of a shale sedimentary layer and other rock layers are fully processed andadjusted, the problems of difficult drilling-down and large risk of casing laying after the drill finish of the continuous shale reservoir with a large thickness in the prior art are solved, and the purposes of reducing operation risk and improving the safety factor of the casing laying from the construction process are realized.

Drilling finish method for continuous shale reservoir

The invention discloses a drilling finishing method for a heterogeneous shale gas well reservoir section. A well drilling process for drilling finishing of the shale gas reservoir section is protected, and the drilling finishing method is especially suitable for a well body structure with serious heterogeneity, wherein a shale reservoir section of the well body structure is long at a macro level;an engineering construction method with high feasibility and significant effects is provided, a well drilling liquid system with the high price does not need to be adopted, and only from the engineering point of view, an open hole well section of the shale reservoir section is fully repaired and standardized; and the problems of difficult trip and large casing risk during drilling finishing of a shale gas well with the high buried depth in the prior art are solved, and the purposes of lowering the operation risk and increasing the casing safety coefficient from the construction process are achieved.

Drilling finishing method for heterogeneous shale gas well reservoir section

The invention discloses a redressing-while-drilling machine for drilling engineering. The redressing-while-drilling machine for drilling engineering comprises a cylinder body and three spiral-shaped blade wings, the three blade wings are evenly fixed to the cylinder body. The blade wings comprise blade wing bodies, PDC clad sheet cutting teeth and gauge protection flat teeth. Every blade wing bodies is evenly provided with 13-17 PDC clad sheet cutting teeth, and the gauge protection portions of the blade wing bodies are evenly provided with the gauge protection flat teeth. The redressing-while-drilling machine for drilling engineering is simple in structure, redressing while drilling is performed by using the redressing-while-drilling machine, the well wall can be cleaned and scraped whiledrilling, so that the well wall can be corrected, the redressing effect is improved, hole shrinkage is eliminated and a mould bed is cleaned, and the size of a hole diameter is ensured. The redressing machine can change the flow field of drilling fluid in a well, rotational flow upwards going of the drilling fluid and rock debris is facilitated, and the sand-carrying capacity of the drilling fluid is improved.

Redressing-while-drilling machine for drilling engineering and redressing method

The invention discloses a module drilling machine optimal and fast casing running technical method. The module drilling machine optimal and fast casing running technical method includes a brand-new optimal and fast casing running mode different from a conventional casing running mode of a workover rig and drilling platform cranes cooperating with double pneumatic winches. The module drilling machine optimal and fast casing running technical method mainly includes the steps that before drilling and completion operation, long hanging rings are selected as top drive hanging rings; casings are arranged in a casing deck sleeper area, and a casing chart is made according to the sequential serial numbers; an optimal and fast casing running working table is put in place; connection with a continuous grouting pipeline is performed; a crane is adopted to lift the multiple casings onto the optimal and fast casing running working table at a time, male buckle ends are located at a working table baffle, and female buckle ends are located at a drilling platform gate; lifting hooks and lifting cables are released, and the crane pulls a rod to prepare to transfer the other casings onto the optimaland fast casing running working table; a pneumatic winch on a drilling platform adopts a lifting belt to hold the bottoms of the casings and make the casings be lifted up and leave the catwalk surface; and after a traveling block is set, a suspension arm tilts to be matched with the pneumatic winch for elevator buckling. According to the module drilling machine optimal and fast casing running technical method, the structure is simple, the investment cost is low, the operation labor cost and the equipment cost are reduced, and the using efficiency of on-site equipment is greatly improved.

Module drilling machine optimal and fast casing running technical method

The invention discloses a batch drilling well wellhead design and assembling-disassembling method for a modular drilling machine. The wellhead design comprises the following design of supporting facilities: wellhead deck design, split bell mouth design, bell mouth fixing mode design, bell mouth fixed suspension design, grouting pipeline fixed design of bell mouths, reflux pipes and metering pumps, bell mouth variable diameter design, bell mouth variable diameter hoisting special tool design, telescopic inner and outer drum horn tube design, sealing design of special pressure plate sealing or gas inflatable pneumatic tires, lifting pipe hoisting special design, and special lifting pipe suspending channel design which are easy enough to operate. The batch drilling well wellhead design and matched wellhead assembling-disassembling method for the modular drilling machine provided by the invention can solve the problem of time consumption caused by frequently moving of a derrick in batch drilling operation of the modular drilling machine, reduce hoisting risks and risks of high falling objects caused by dissembling and throwing wellhead parts and optimize assembling and disassembling method of wellheads, and further are simple and convenient in design and simple in operation mode.

Batch drilling well wellhead design and assembling-disassembling method for modular drilling machine

The invention discloses integrated heat-preservation test fluid for a deep water single-layer marine riser The integrated heat-preservation test fluid is composed of the following components of, by weight, 100 parts of non-water-base fluid with low heat conductivity, 5-10 parts of thickening agents, and 2-180 parts of weighting agents, wherein the non-water-base fluid with the low heat conductivity is compounded by synthetic polyalcohol and reduced sugar alcohol According to the integrated heat-preservation test fluid, the heat conductivity coefficient is less than or equal to 030W/(mK), and the density can be adjusted within 105-150 SG or 150-105 SG from low to high or from high to low; the integrated heat-preservation test fluid is good in pumpability, good in low temperature-high temperature-low temperature rheological property, high in gas hydrate inhibition ability, good in high temperature settlement resistance stability (temperature resistance can be up to 150 DEG C), good in inhibition anti-swelling property, low in corrosion and good in reservoir protection performance; environmental friendliness is achieved, the using requirements of the first-level sea area can be met, the integrated heat-preservation test fluid can further be recycled, and the test cost can be greatly saved; and the integrated heat-preservation test fluid can be used for test operation of the deep water single-layer marine riser

Integrated heat-preservation test fluid for deep water single-layer marine riser

The invention discloses a high oil-water ratiooil base drilling fluid system. The system is prepared from, by volume, 90-95 parts of base oil and 5-10 parts of an aqueous phase, and further comprisesa primary emulsifier, an auxiliary emulsifier, a wetting agent, organic soil, calcium oxide, an emulsifying sealing material, a keritesealing material and calcium chloride brine, wherein the weight ofthe primary emulsifieris equal to 0.8-1.8% of the overall weight of the base oil and the aqueous phase, the auxiliary emulsifier1.0-2.0%, the wetting agent 1.2-1.5%, the organic soil 2.0-3.0%, the calcium oxide 3.0-4.0%, the emulsifying sealing material 3.5-4.5%, the keritesealing material 1-1.5% and the calcium chloride brine 2.0-2.5%. The high oil-water ratiooil base drilling fluid system is low in ECD value, has good emulsion stability, low rheological property and good well wall flushing capability, facilitates borehole cleaning, cost saving of drilling fluid and maintenance of on-site performanceof the drilling fluid, effectively reduces the risk of well leakage, and can avoid rheological propertyrise caused by drilling a stratum in which the moisture content is high.

Liu Zhiqin

Papers

Redressing-while-drilling machine for drilling engineering and redressing method

Module drilling machine optimal and fast casing running technical method

Batch drilling well wellhead design and assembling-disassembling method for modular drilling machine

Integrated heat-preservation test fluid for deep water single-layer marine riser

High oil-water ratiooil base drilling fluid system